text: /*
   * JsSIP v3.3.11
   * the Javascript SIP library
   * Copyright: 2012-2020 José Luis Millán <jmillan@aliax.net> (https://github.com/jmillan)
   * Homepage: https://jssip.net
   * License: MIT
   */
  
  (function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.JsSIP = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
  "use strict";
  
  function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var it, normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
  
  var Utils = require('./Utils');
  
  var JsSIP_C = require('./Constants');
  
  var Grammar = require('./Grammar');
  
  var URI = require('./URI');
  
  var Socket = require('./Socket');
  
  var Exceptions = require('./Exceptions'); // Default settings.
  
  
  exports.settings = {
    // SIP authentication.
    authorization_user: null,
    password: null,
    realm: null,
    ha1: null,
    // SIP account.
    display_name: null,
    uri: null,
    contact_uri: null,
    // SIP instance id (GRUU).
    instance_id: null,
    // Preloaded SIP Route header field.
    use_preloaded_route: false,
    // Session parameters.
    session_timers: true,
    session_timers_refresh_method: JsSIP_C.UPDATE,
    no_answer_timeout: 60,
    // Registration parameters.
    register: true,
    register_expires: 600,
    registrar_server: null,
    // Connection options.
    sockets: null,
    connection_recovery_max_interval: JsSIP_C.CONNECTION_RECOVERY_MAX_INTERVAL,
    connection_recovery_min_interval: JsSIP_C.CONNECTION_RECOVERY_MIN_INTERVAL,
  
    /*
     * Host address.
     * Value to be set in Via sent_by and host part of Contact FQDN.
    */
    via_host: "".concat(Utils.createRandomToken(12), ".invalid")
  }; // Configuration checks.
  
  var checks = {
    mandatory: {
      sockets: function sockets(_sockets2) {
        /* Allow defining sockets parameter as:
         *  Socket: socket
         *  Array of Socket: [socket1, socket2]
         *  Array of Objects: [{socket: socket1, weight:1}, {socket: Socket2, weight:0}]
         *  Array of Objects and Socket: [{socket: socket1}, socket2]
         */
        var _sockets = [];
  
        if (Socket.isSocket(_sockets2)) {
          _sockets.push({
            socket: _sockets2
          });
        } else if (Array.isArray(_sockets2) && _sockets2.length) {
          var _iterator = _createForOfIteratorHelper(_sockets2),
              _step;
  
          try {
            for (_iterator.s(); !(_step = _iterator.n()).done;) {
              var socket = _step.value;
  
              if (Object.prototype.hasOwnProperty.call(socket, 'socket') && Socket.isSocket(socket.socket)) {
                _sockets.push(socket);
              } else if (Socket.isSocket(socket)) {
                _sockets.push({
                  socket: socket
                });
              }
            }
          } catch (err) {
            _iterator.e(err);
          } finally {
            _iterator.f();
          }
        } else {
          return;
        }
  
        return _sockets;
      },
      uri: function uri(_uri) {
        if (!/^sip:/i.test(_uri)) {
          _uri = "".concat(JsSIP_C.SIP, ":").concat(_uri);
        }
  
        var parsed = URI.parse(_uri);
  
        if (!parsed) {
          return;
        } else if (!parsed.user) {
          return;
        } else {
          return parsed;
        }
      }
    },
    optional: {
      authorization_user: function authorization_user(_authorization_user) {
        if (Grammar.parse("\"".concat(_authorization_user, "\""), 'quoted_string') === -1) {
          return;
        } else {
          return _authorization_user;
        }
      },
      authorization_jwt: function authorization_jwt(_authorization_jwt) {
        if (typeof _authorization_jwt === 'string') {
          return _authorization_jwt;
        }
      },
      user_agent: function user_agent(_user_agent) {
        if (typeof _user_agent === 'string') {
          return _user_agent;
        }
      },
      connection_recovery_max_interval: function connection_recovery_max_interval(_connection_recovery_max_interval) {
        if (Utils.isDecimal(_connection_recovery_max_interval)) {
          var value = Number(_connection_recovery_max_interval);
  
          if (value > 0) {
            return value;
          }
        }
      },
      connection_recovery_min_interval: function connection_recovery_min_interval(_connection_recovery_min_interval) {
        if (Utils.isDecimal(_connection_recovery_min_interval)) {
          var value = Number(_connection_recovery_min_interval);
  
          if (value > 0) {
            return value;
          }
        }
      },
      contact_uri: function contact_uri(_contact_uri) {
        if (typeof _contact_uri === 'string') {
          var uri = Grammar.parse(_contact_uri, 'SIP_URI');
  
          if (uri !== -1) {
            return uri;
          }
        }
      },
      display_name: function display_name(_display_name) {
        return _display_name;
      },
      instance_id: function instance_id(_instance_id) {
        if (/^uuid:/i.test(_instance_id)) {
          _instance_id = _instance_id.substr(5);
        }
  
        if (Grammar.parse(_instance_id, 'uuid') === -1) {
          return;
        } else {
          return _instance_id;
        }
      },
      no_answer_timeout: function no_answer_timeout(_no_answer_timeout) {
        if (Utils.isDecimal(_no_answer_timeout)) {
          var value = Number(_no_answer_timeout);
  
          if (value > 0) {
            return value;
          }
        }
      },
      session_timers: function session_timers(_session_timers) {
        if (typeof _session_timers === 'boolean') {
          return _session_timers;
        }
      },
      session_timers_refresh_method: function session_timers_refresh_method(method) {
        if (typeof method === 'string') {
          method = method.toUpperCase();
  
          if (method === JsSIP_C.INVITE || method === JsSIP_C.UPDATE) {
            return method;
          }
        }
      },
      password: function password(_password) {
        return String(_password);
      },
      realm: function realm(_realm) {
        return String(_realm);
      },
      ha1: function ha1(_ha) {
        return String(_ha);
      },
      register: function register(_register) {
        if (typeof _register === 'boolean') {
          return _register;
        }
      },
      register_expires: function register_expires(_register_expires) {
        if (Utils.isDecimal(_register_expires)) {
          var value = Number(_register_expires);
  
          if (value > 0) {
            return value;
          }
        }
      },
      registrar_server: function registrar_server(_registrar_server) {
        if (!/^sip:/i.test(_registrar_server)) {
          _registrar_server = "".concat(JsSIP_C.SIP, ":").concat(_registrar_server);
        }
  
        var parsed = URI.parse(_registrar_server);
  
        if (!parsed) {
          return;
        } else if (parsed.user) {
          return;
        } else {
          return parsed;
        }
      },
      use_preloaded_route: function use_preloaded_route(_use_preloaded_route) {
        if (typeof _use_preloaded_route === 'boolean') {
          return _use_preloaded_route;
        }
      }
    }
  };
  
  exports.load = function (dst, src) {
    // Check Mandatory parameters.
    for (var parameter in checks.mandatory) {
      if (!src.hasOwnProperty(parameter)) {
        throw new Exceptions.ConfigurationError(parameter);
      } else {
        var value = src[parameter];
        var checked_value = checks.mandatory[parameter](value);
  
        if (checked_value !== undefined) {
          dst[parameter] = checked_value;
        } else {
          throw new Exceptions.ConfigurationError(parameter, value);
        }
      }
    } // Check Optional parameters.
  
  
    for (var _parameter in checks.optional) {
      if (src.hasOwnProperty(_parameter)) {
        var _value = src[_parameter];
        /* If the parameter value is null, empty string, undefined, empty array
         * or it's a number with NaN value, then apply its default value.
         */
  
        if (Utils.isEmpty(_value)) {
          continue;
        }
  
        var _checked_value = checks.optional[_parameter](_value);
  
        if (_checked_value !== undefined) {
          dst[_parameter] = _checked_value;
        } else {
          throw new Exceptions.ConfigurationError(_parameter, _value);
        }
      }
    }
  };
  },{"./Constants":2,"./Exceptions":6,"./Grammar":7,"./Socket":20,"./URI":25,"./Utils":26}],2:[function(require,module,exports){
  "use strict";
  
  var pkg = require('../package.json');
  
  module.exports = {
    USER_AGENT: "".concat(pkg.title, " ").concat(pkg.version),
    // SIP scheme.
    SIP: 'sip',
    SIPS: 'sips',
    // End and Failure causes.
    causes: {
      // Generic error causes.
      CONNECTION_ERROR: 'Connection Error',
      REQUEST_TIMEOUT: 'Request Timeout',
      SIP_FAILURE_CODE: 'SIP Failure Code',
      INTERNAL_ERROR: 'Internal Error',
      // SIP error causes.
      BUSY: 'Busy',
      REJECTED: 'Rejected',
      REDIRECTED: 'Redirected',
      UNAVAILABLE: 'Unavailable',
      NOT_FOUND: 'Not Found',
      ADDRESS_INCOMPLETE: 'Address Incomplete',
      INCOMPATIBLE_SDP: 'Incompatible SDP',
      MISSING_SDP: 'Missing SDP',
      AUTHENTICATION_ERROR: 'Authentication Error',
      // Session error causes.
      BYE: 'Terminated',
      WEBRTC_ERROR: 'WebRTC Error',
      CANCELED: 'Canceled',
      NO_ANSWER: 'No Answer',
      EXPIRES: 'Expires',
      NO_ACK: 'No ACK',
      DIALOG_ERROR: 'Dialog Error',
      USER_DENIED_MEDIA_ACCESS: 'User Denied Media Access',
      BAD_MEDIA_DESCRIPTION: 'Bad Media Description',
      RTP_TIMEOUT: 'RTP Timeout'
    },
    SIP_ERROR_CAUSES: {
      REDIRECTED: [300, 301, 302, 305, 380],
      BUSY: [486, 600],
      REJECTED: [403, 603],
      NOT_FOUND: [404, 604],
      UNAVAILABLE: [480, 410, 408, 430],
      ADDRESS_INCOMPLETE: [484, 424],
      INCOMPATIBLE_SDP: [488, 606],
      AUTHENTICATION_ERROR: [401, 407]
    },
    // SIP Methods.
    ACK: 'ACK',
    BYE: 'BYE',
    CANCEL: 'CANCEL',
    INFO: 'INFO',
    INVITE: 'INVITE',
    MESSAGE: 'MESSAGE',
    NOTIFY: 'NOTIFY',
    OPTIONS: 'OPTIONS',
    REGISTER: 'REGISTER',
    REFER: 'REFER',
    UPDATE: 'UPDATE',
    SUBSCRIBE: 'SUBSCRIBE',
  
    /* SIP Response Reasons
     * DOC: https://www.iana.org/assignments/sip-parameters
     * Copied from https://github.com/versatica/OverSIP/blob/master/lib/oversip/sip/constants.rb#L7
     */
    REASON_PHRASE: {
      100: 'Trying',
      180: 'Ringing',
      181: 'Call Is Being Forwarded',
      182: 'Queued',
      183: 'Session Progress',
      199: 'Early Dialog Terminated',
      // draft-ietf-sipcore-199
      200: 'OK',
      202: 'Accepted',
      // RFC 3265
      204: 'No Notification',
      // RFC 5839
      300: 'Multiple Choices',
      301: 'Moved Permanently',
      302: 'Moved Temporarily',
      305: 'Use Proxy',
      380: 'Alternative Service',
      400: 'Bad Request',
      401: 'Unauthorized',
      402: 'Payment Required',
      403: 'Forbidden',
      404: 'Not Found',
      405: 'Method Not Allowed',
      406: 'Not Acceptable',
      407: 'Proxy Authentication Required',
      408: 'Request Timeout',
      410: 'Gone',
      412: 'Conditional Request Failed',
      // RFC 3903
      413: 'Request Entity Too Large',
      414: 'Request-URI Too Long',
      415: 'Unsupported Media Type',
      416: 'Unsupported URI Scheme',
      417: 'Unknown Resource-Priority',
      // RFC 4412
      420: 'Bad Extension',
      421: 'Extension Required',
      422: 'Session Interval Too Small',
      // RFC 4028
      423: 'Interval Too Brief',
      424: 'Bad Location Information',
      // RFC 6442
      428: 'Use Identity Header',
      // RFC 4474
      429: 'Provide Referrer Identity',
      // RFC 3892
      430: 'Flow Failed',
      // RFC 5626
      433: 'Anonymity Disallowed',
      // RFC 5079
      436: 'Bad Identity-Info',
      // RFC 4474
      437: 'Unsupported Certificate',
      // RFC 4744
      438: 'Invalid Identity Header',
      // RFC 4744
      439: 'First Hop Lacks Outbound Support',
      // RFC 5626
      440: 'Max-Breadth Exceeded',
      // RFC 5393
      469: 'Bad Info Package',
      // draft-ietf-sipcore-info-events
      470: 'Consent Needed',
      // RFC 5360
      478: 'Unresolvable Destination',
      // Custom code copied from Kamailio.
      480: 'Temporarily Unavailable',
      481: 'Call/Transaction Does Not Exist',
      482: 'Loop Detected',
      483: 'Too Many Hops',
      484: 'Address Incomplete',
      485: 'Ambiguous',
      486: 'Busy Here',
      487: 'Request Terminated',
      488: 'Not Acceptable Here',
      489: 'Bad Event',
      // RFC 3265
      491: 'Request Pending',
      493: 'Undecipherable',
      494: 'Security Agreement Required',
      // RFC 3329
      500: 'JsSIP Internal Error',
      501: 'Not Implemented',
      502: 'Bad Gateway',
      503: 'Service Unavailable',
      504: 'Server Time-out',
      505: 'Version Not Supported',
      513: 'Message Too Large',
      580: 'Precondition Failure',
      // RFC 3312
      600: 'Busy Everywhere',
      603: 'Decline',
      604: 'Does Not Exist Anywhere',
      606: 'Not Acceptable'
    },
    ALLOWED_METHODS: 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY',
    ACCEPTED_BODY_TYPES: 'application/sdp, application/dtmf-relay',
    MAX_FORWARDS: 69,
    SESSION_EXPIRES: 90,
    MIN_SESSION_EXPIRES: 60,
    CONNECTION_RECOVERY_MAX_INTERVAL: 30,
    CONNECTION_RECOVERY_MIN_INTERVAL: 2
  };
  },{"../package.json":38}],3:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var SIPMessage = require('./SIPMessage');
  
  var JsSIP_C = require('./Constants');
  
  var Transactions = require('./Transactions');
  
  var Dialog_RequestSender = require('./Dialog/RequestSender');
  
  var Utils = require('./Utils');
  
  var debug = require('debug')('JsSIP:Dialog');
  
  var C = {
    // Dialog states.
    STATUS_EARLY: 1,
    STATUS_CONFIRMED: 2
  }; // RFC 3261 12.1.
  
  module.exports = /*#__PURE__*/function () {
    _createClass(Dialog, null, [{
      key: "C",
      // Expose C object.
      get: function get() {
        return C;
      }
    }]);
  
    function Dialog(owner, message, type) {
      var state = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : C.STATUS_CONFIRMED;
  
      _classCallCheck(this, Dialog);
  
      this._owner = owner;
      this._ua = owner._ua;
      this._uac_pending_reply = false;
      this._uas_pending_reply = false;
  
      if (!message.hasHeader('contact')) {
        return {
          error: 'unable to create a Dialog without Contact header field'
        };
      }
  
      if (message instanceof SIPMessage.IncomingResponse) {
        state = message.status_code < 200 ? C.STATUS_EARLY : C.STATUS_CONFIRMED;
      }
  
      var contact = message.parseHeader('contact'); // RFC 3261 12.1.1.
  
      if (type === 'UAS') {
        this._id = {
          call_id: message.call_id,
          local_tag: message.to_tag,
          remote_tag: message.from_tag,
          toString: function toString() {
            return this.call_id + this.local_tag + this.remote_tag;
          }
        };
        this._state = state;
        this._remote_seqnum = message.cseq;
        this._local_uri = message.parseHeader('to').uri;
        this._remote_uri = message.parseHeader('from').uri;
        this._remote_target = contact.uri;
        this._route_set = message.getHeaders('record-route');
        this._ack_seqnum = this._remote_seqnum;
      } // RFC 3261 12.1.2.
      else if (type === 'UAC') {
          this._id = {
            call_id: message.call_id,
            local_tag: message.from_tag,
            remote_tag: message.to_tag,
            toString: function toString() {
              return this.call_id + this.local_tag + this.remote_tag;
            }
          };
          this._state = state;
          this._local_seqnum = message.cseq;
          this._local_uri = message.parseHeader('from').uri;
          this._remote_uri = message.parseHeader('to').uri;
          this._remote_target = contact.uri;
          this._route_set = message.getHeaders('record-route').reverse();
          this._ack_seqnum = null;
        }
  
      this._ua.newDialog(this);
  
      debug("new ".concat(type, " dialog created with status ").concat(this._state === C.STATUS_EARLY ? 'EARLY' : 'CONFIRMED'));
    }
  
    _createClass(Dialog, [{
      key: "update",
      value: function update(message, type) {
        this._state = C.STATUS_CONFIRMED;
        debug("dialog ".concat(this._id.toString(), "  changed to CONFIRMED state"));
  
        if (type === 'UAC') {
          // RFC 3261 13.2.2.4.
          this._route_set = message.getHeaders('record-route').reverse();
        }
      }
    }, {
      key: "terminate",
      value: function terminate() {
        debug("dialog ".concat(this._id.toString(), " deleted"));
  
        this._ua.destroyDialog(this);
      }
    }, {
      key: "sendRequest",
      value: function sendRequest(method) {
        var _this = this;
  
        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var eventHandlers = options.eventHandlers || {};
        var body = options.body || null;
  
        var request = this._createRequest(method, extraHeaders, body); // Increase the local CSeq on authentication.
  
  
        eventHandlers.onAuthenticated = function () {
          _this._local_seqnum += 1;
        };
  
        var request_sender = new Dialog_RequestSender(this, request, eventHandlers);
        request_sender.send(); // Return the instance of OutgoingRequest.
  
        return request;
      }
    }, {
      key: "receiveRequest",
      value: function receiveRequest(request) {
        // Check in-dialog request.
        if (!this._checkInDialogRequest(request)) {
          return;
        } // ACK received. Cleanup this._ack_seqnum.
  
  
        if (request.method === JsSIP_C.ACK && this._ack_seqnum !== null) {
          this._ack_seqnum = null;
        } // INVITE received. Set this._ack_seqnum.
        else if (request.method === JsSIP_C.INVITE) {
            this._ack_seqnum = request.cseq;
          }
  
        this._owner.receiveRequest(request);
      } // RFC 3261 12.2.1.1.
  
    }, {
      key: "_createRequest",
      value: function _createRequest(method, extraHeaders, body) {
        extraHeaders = Utils.cloneArray(extraHeaders);
  
        if (!this._local_seqnum) {
          this._local_seqnum = Math.floor(Math.random() * 10000);
        }
  
        var cseq = method === JsSIP_C.CANCEL || method === JsSIP_C.ACK ? this._local_seqnum : this._local_seqnum += 1;
        var request = new SIPMessage.OutgoingRequest(method, this._remote_target, this._ua, {
          'cseq': cseq,
          'call_id': this._id.call_id,
          'from_uri': this._local_uri,
          'from_tag': this._id.local_tag,
          'to_uri': this._remote_uri,
          'to_tag': this._id.remote_tag,
          'route_set': this._route_set
        }, extraHeaders, body);
        return request;
      } // RFC 3261 12.2.2.
  
    }, {
      key: "_checkInDialogRequest",
      value: function _checkInDialogRequest(request) {
        var _this2 = this;
  
        if (!this._remote_seqnum) {
          this._remote_seqnum = request.cseq;
        } else if (request.cseq < this._remote_seqnum) {
          if (request.method === JsSIP_C.ACK) {
            // We are not expecting any ACK with lower seqnum than the current one.
            // Or this is not the ACK we are waiting for.
            if (this._ack_seqnum === null || request.cseq !== this._ack_seqnum) {
              return false;
            }
          } else {
            request.reply(500);
            return false;
          }
        } else if (request.cseq > this._remote_seqnum) {
          this._remote_seqnum = request.cseq;
        } // RFC3261 14.2 Modifying an Existing Session -UAS BEHAVIOR-.
  
  
        if (request.method === JsSIP_C.INVITE || request.method === JsSIP_C.UPDATE && request.body) {
          if (this._uac_pending_reply === true) {
            request.reply(491);
          } else if (this._uas_pending_reply === true) {
            var retryAfter = (Math.random() * 10 | 0) + 1;
            request.reply(500, null, ["Retry-After:".concat(retryAfter)]);
            return false;
          } else {
            this._uas_pending_reply = true;
  
            var stateChanged = function stateChanged() {
              if (request.server_transaction.state === Transactions.C.STATUS_ACCEPTED || request.server_transaction.state === Transactions.C.STATUS_COMPLETED || request.server_transaction.state === Transactions.C.STATUS_TERMINATED) {
                request.server_transaction.removeListener('stateChanged', stateChanged);
                _this2._uas_pending_reply = false;
              }
            };
  
            request.server_transaction.on('stateChanged', stateChanged);
          } // RFC3261 12.2.2 Replace the dialog`s remote target URI if the request is accepted.
  
  
          if (request.hasHeader('contact')) {
            request.server_transaction.on('stateChanged', function () {
              if (request.server_transaction.state === Transactions.C.STATUS_ACCEPTED) {
                _this2._remote_target = request.parseHeader('contact').uri;
              }
            });
          }
        } else if (request.method === JsSIP_C.NOTIFY) {
          // RFC6665 3.2 Replace the dialog`s remote target URI if the request is accepted.
          if (request.hasHeader('contact')) {
            request.server_transaction.on('stateChanged', function () {
              if (request.server_transaction.state === Transactions.C.STATUS_COMPLETED) {
                _this2._remote_target = request.parseHeader('contact').uri;
              }
            });
          }
        }
  
        return true;
      }
    }, {
      key: "id",
      get: function get() {
        return this._id;
      }
    }, {
      key: "local_seqnum",
      get: function get() {
        return this._local_seqnum;
      },
      set: function set(num) {
        this._local_seqnum = num;
      }
    }, {
      key: "owner",
      get: function get() {
        return this._owner;
      }
    }, {
      key: "uac_pending_reply",
      get: function get() {
        return this._uac_pending_reply;
      },
      set: function set(pending) {
        this._uac_pending_reply = pending;
      }
    }, {
      key: "uas_pending_reply",
      get: function get() {
        return this._uas_pending_reply;
      }
    }]);
  
    return Dialog;
  }();
  },{"./Constants":2,"./Dialog/RequestSender":4,"./SIPMessage":19,"./Transactions":22,"./Utils":26,"debug":30}],4:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var JsSIP_C = require('../Constants');
  
  var Transactions = require('../Transactions');
  
  var RTCSession = require('../RTCSession');
  
  var RequestSender = require('../RequestSender'); // Default event handlers.
  
  
  var EventHandlers = {
    onRequestTimeout: function onRequestTimeout() {},
    onTransportError: function onTransportError() {},
    onSuccessResponse: function onSuccessResponse() {},
    onErrorResponse: function onErrorResponse() {},
    onAuthenticated: function onAuthenticated() {},
    onDialogError: function onDialogError() {}
  };
  
  module.exports = /*#__PURE__*/function () {
    function DialogRequestSender(dialog, request, eventHandlers) {
      _classCallCheck(this, DialogRequestSender);
  
      this._dialog = dialog;
      this._ua = dialog._ua;
      this._request = request;
      this._eventHandlers = eventHandlers; // RFC3261 14.1 Modifying an Existing Session. UAC Behavior.
  
      this._reattempt = false;
      this._reattemptTimer = null; // Define the undefined handlers.
  
      for (var handler in EventHandlers) {
        if (Object.prototype.hasOwnProperty.call(EventHandlers, handler)) {
          if (!this._eventHandlers[handler]) {
            this._eventHandlers[handler] = EventHandlers[handler];
          }
        }
      }
    }
  
    _createClass(DialogRequestSender, [{
      key: "send",
      value: function send() {
        var _this = this;
  
        var request_sender = new RequestSender(this._ua, this._request, {
          onRequestTimeout: function onRequestTimeout() {
            _this._eventHandlers.onRequestTimeout();
          },
          onTransportError: function onTransportError() {
            _this._eventHandlers.onTransportError();
          },
          onAuthenticated: function onAuthenticated(request) {
            _this._eventHandlers.onAuthenticated(request);
          },
          onReceiveResponse: function onReceiveResponse(response) {
            _this._receiveResponse(response);
          }
        });
        request_sender.send(); // RFC3261 14.2 Modifying an Existing Session -UAC BEHAVIOR-.
  
        if ((this._request.method === JsSIP_C.INVITE || this._request.method === JsSIP_C.UPDATE && this._request.body) && request_sender.clientTransaction.state !== Transactions.C.STATUS_TERMINATED) {
          this._dialog.uac_pending_reply = true;
  
          var stateChanged = function stateChanged() {
            if (request_sender.clientTransaction.state === Transactions.C.STATUS_ACCEPTED || request_sender.clientTransaction.state === Transactions.C.STATUS_COMPLETED || request_sender.clientTransaction.state === Transactions.C.STATUS_TERMINATED) {
              request_sender.clientTransaction.removeListener('stateChanged', stateChanged);
              _this._dialog.uac_pending_reply = false;
            }
          };
  
          request_sender.clientTransaction.on('stateChanged', stateChanged);
        }
      }
    }, {
      key: "_receiveResponse",
      value: function _receiveResponse(response) {
        var _this2 = this;
  
        // RFC3261 12.2.1.2 408 or 481 is received for a request within a dialog.
        if (response.status_code === 408 || response.status_code === 481) {
          this._eventHandlers.onDialogError(response);
        } else if (response.method === JsSIP_C.INVITE && response.status_code === 491) {
          if (this._reattempt) {
            if (response.status_code >= 200 && response.status_code < 300) {
              this._eventHandlers.onSuccessResponse(response);
            } else if (response.status_code >= 300) {
              this._eventHandlers.onErrorResponse(response);
            }
          } else {
            this._request.cseq.value = this._dialog.local_seqnum += 1;
            this._reattemptTimer = setTimeout(function () {
              // TODO: look at dialog state instead.
              if (_this2._dialog.owner.status !== RTCSession.C.STATUS_TERMINATED) {
                _this2._reattempt = true;
  
                _this2._request_sender.send();
              }
            }, 1000);
          }
        } else if (response.status_code >= 200 && response.status_code < 300) {
          this._eventHandlers.onSuccessResponse(response);
        } else if (response.status_code >= 300) {
          this._eventHandlers.onErrorResponse(response);
        }
      }
    }, {
      key: "request",
      get: function get() {
        return this._request;
      }
    }]);
  
    return DialogRequestSender;
  }();
  },{"../Constants":2,"../RTCSession":12,"../RequestSender":18,"../Transactions":22}],5:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var Utils = require('./Utils');
  
  var debug = require('debug')('JsSIP:DigestAuthentication');
  
  var debugerror = require('debug')('JsSIP:ERROR:DigestAuthentication');
  
  debugerror.log = console.warn.bind(console);
  
  module.exports = /*#__PURE__*/function () {
    function DigestAuthentication(credentials) {
      _classCallCheck(this, DigestAuthentication);
  
      this._credentials = credentials;
      this._cnonce = null;
      this._nc = 0;
      this._ncHex = '00000000';
      this._algorithm = null;
      this._realm = null;
      this._nonce = null;
      this._opaque = null;
      this._stale = null;
      this._qop = null;
      this._method = null;
      this._uri = null;
      this._ha1 = null;
      this._response = null;
    }
  
    _createClass(DigestAuthentication, [{
      key: "get",
      value: function get(parameter) {
        switch (parameter) {
          case 'realm':
            return this._realm;
  
          case 'ha1':
            return this._ha1;
  
          default:
            debugerror('get() | cannot get "%s" parameter', parameter);
            return undefined;
        }
      }
      /**
      * Performs Digest authentication given a SIP request and the challenge
      * received in a response to that request.
      * Returns true if auth was successfully generated, false otherwise.
      */
  
    }, {
      key: "authenticate",
      value: function authenticate(_ref, challenge)
      /* test interface */
      {
        var method = _ref.method,
            ruri = _ref.ruri,
            body = _ref.body;
        var cnonce = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
        this._algorithm = challenge.algorithm;
        this._realm = challenge.realm;
        this._nonce = challenge.nonce;
        this._opaque = challenge.opaque;
        this._stale = challenge.stale;
  
        if (this._algorithm) {
          if (this._algorithm !== 'MD5') {
            debugerror('authenticate() | challenge with Digest algorithm different than "MD5", authentication aborted');
            return false;
          }
        } else {
          this._algorithm = 'MD5';
        }
  
        if (!this._nonce) {
          debugerror('authenticate() | challenge without Digest nonce, authentication aborted');
          return false;
        }
  
        if (!this._realm) {
          debugerror('authenticate() | challenge without Digest realm, authentication aborted');
          return false;
        } // If no plain SIP password is provided.
  
  
        if (!this._credentials.password) {
          // If ha1 is not provided we cannot authenticate.
          if (!this._credentials.ha1) {
            debugerror('authenticate() | no plain SIP password nor ha1 provided, authentication aborted');
            return false;
          } // If the realm does not match the stored realm we cannot authenticate.
  
  
          if (this._credentials.realm !== this._realm) {
            debugerror('authenticate() | no plain SIP password, and stored `realm` does not match the given `realm`, cannot authenticate [stored:"%s", given:"%s"]', this._credentials.realm, this._realm);
            return false;
          }
        } // 'qop' can contain a list of values (Array). Let's choose just one.
  
  
        if (challenge.qop) {
          if (challenge.qop.indexOf('auth-int') > -1) {
            this._qop = 'auth-int';
          } else if (challenge.qop.indexOf('auth') > -1) {
            this._qop = 'auth';
          } else {
            // Otherwise 'qop' is present but does not contain 'auth' or 'auth-int', so abort here.
            debugerror('authenticate() | challenge without Digest qop different than "auth" or "auth-int", authentication aborted');
            return false;
          }
        } else {
          this._qop = null;
        } // Fill other attributes.
  
  
        this._method = method;
        this._uri = ruri;
        this._cnonce = cnonce || Utils.createRandomToken(12);
        this._nc += 1;
        var hex = Number(this._nc).toString(16);
        this._ncHex = '00000000'.substr(0, 8 - hex.length) + hex; // Nc-value = 8LHEX. Max value = 'FFFFFFFF'.
  
        if (this._nc === 4294967296) {
          this._nc = 1;
          this._ncHex = '00000001';
        } // Calculate the Digest "response" value.
        // If we have plain SIP password then regenerate ha1.
  
  
        if (this._credentials.password) {
          // HA1 = MD5(A1) = MD5(username:realm:password).
          this._ha1 = Utils.calculateMD5("".concat(this._credentials.username, ":").concat(this._realm, ":").concat(this._credentials.password));
        } // Otherwise reuse the stored ha1.
        else {
            this._ha1 = this._credentials.ha1;
          }
  
        var a2;
        var ha2;
  
        if (this._qop === 'auth') {
          // HA2 = MD5(A2) = MD5(method:digestURI).
          a2 = "".concat(this._method, ":").concat(this._uri);
          ha2 = Utils.calculateMD5(a2);
          debug('authenticate() | using qop=auth [a2:"%s"]', a2); // Response = MD5(HA1:nonce:nonceCount:credentialsNonce:qop:HA2).
  
          this._response = Utils.calculateMD5("".concat(this._ha1, ":").concat(this._nonce, ":").concat(this._ncHex, ":").concat(this._cnonce, ":auth:").concat(ha2));
        } else if (this._qop === 'auth-int') {
          // HA2 = MD5(A2) = MD5(method:digestURI:MD5(entityBody)).
          a2 = "".concat(this._method, ":").concat(this._uri, ":").concat(Utils.calculateMD5(body ? body : ''));
          ha2 = Utils.calculateMD5(a2);
          debug('authenticate() | using qop=auth-int [a2:"%s"]', a2); // Response = MD5(HA1:nonce:nonceCount:credentialsNonce:qop:HA2).
  
          this._response = Utils.calculateMD5("".concat(this._ha1, ":").concat(this._nonce, ":").concat(this._ncHex, ":").concat(this._cnonce, ":auth-int:").concat(ha2));
        } else if (this._qop === null) {
          // HA2 = MD5(A2) = MD5(method:digestURI).
          a2 = "".concat(this._method, ":").concat(this._uri);
          ha2 = Utils.calculateMD5(a2);
          debug('authenticate() | using qop=null [a2:"%s"]', a2); // Response = MD5(HA1:nonce:HA2).
  
          this._response = Utils.calculateMD5("".concat(this._ha1, ":").concat(this._nonce, ":").concat(ha2));
        }
  
        debug('authenticate() | response generated');
        return true;
      }
      /**
      * Return the Proxy-Authorization or WWW-Authorization header value.
      */
  
    }, {
      key: "toString",
      value: function toString() {
        var auth_params = [];
  
        if (!this._response) {
          throw new Error('response field does not exist, cannot generate Authorization header');
        }
  
        auth_params.push("algorithm=".concat(this._algorithm));
        auth_params.push("username=\"".concat(this._credentials.username, "\""));
        auth_params.push("realm=\"".concat(this._realm, "\""));
        auth_params.push("nonce=\"".concat(this._nonce, "\""));
        auth_params.push("uri=\"".concat(this._uri, "\""));
        auth_params.push("response=\"".concat(this._response, "\""));
  
        if (this._opaque) {
          auth_params.push("opaque=\"".concat(this._opaque, "\""));
        }
  
        if (this._qop) {
          auth_params.push("qop=".concat(this._qop));
          auth_params.push("cnonce=\"".concat(this._cnonce, "\""));
          auth_params.push("nc=".concat(this._ncHex));
        }
  
        return "Digest ".concat(auth_params.join(', '));
      }
    }]);
  
    return DigestAuthentication;
  }();
  },{"./Utils":26,"debug":30}],6:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _wrapNativeSuper(Class) { var _cache = typeof Map === "function" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (Class === null || !_isNativeFunction(Class)) return Class; if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() { return _construct(Class, arguments, _getPrototypeOf(this).constructor); } Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _setPrototypeOf(Wrapper, Class); }; return _wrapNativeSuper(Class); }
  
  function _construct(Parent, args, Class) { if (_isNativeReflectConstruct()) { _construct = Reflect.construct; } else { _construct = function _construct(Parent, args, Class) { var a = [null]; a.push.apply(a, args); var Constructor = Function.bind.apply(Parent, a); var instance = new Constructor(); if (Class) _setPrototypeOf(instance, Class.prototype); return instance; }; } return _construct.apply(null, arguments); }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _isNativeFunction(fn) { return Function.toString.call(fn).indexOf("[native code]") !== -1; }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  var ConfigurationError = /*#__PURE__*/function (_Error) {
    _inherits(ConfigurationError, _Error);
  
    var _super = _createSuper(ConfigurationError);
  
    function ConfigurationError(parameter, value) {
      var _this;
  
      _classCallCheck(this, ConfigurationError);
  
      _this = _super.call(this);
      _this.code = 1;
      _this.name = 'CONFIGURATION_ERROR';
      _this.parameter = parameter;
      _this.value = value;
      _this.message = !_this.value ? "Missing parameter: ".concat(_this.parameter) : "Invalid value ".concat(JSON.stringify(_this.value), " for parameter \"").concat(_this.parameter, "\"");
      return _this;
    }
  
    return ConfigurationError;
  }( /*#__PURE__*/_wrapNativeSuper(Error));
  
  var InvalidStateError = /*#__PURE__*/function (_Error2) {
    _inherits(InvalidStateError, _Error2);
  
    var _super2 = _createSuper(InvalidStateError);
  
    function InvalidStateError(status) {
      var _this2;
  
      _classCallCheck(this, InvalidStateError);
  
      _this2 = _super2.call(this);
      _this2.code = 2;
      _this2.name = 'INVALID_STATE_ERROR';
      _this2.status = status;
      _this2.message = "Invalid status: ".concat(status);
      return _this2;
    }
  
    return InvalidStateError;
  }( /*#__PURE__*/_wrapNativeSuper(Error));
  
  var NotSupportedError = /*#__PURE__*/function (_Error3) {
    _inherits(NotSupportedError, _Error3);
  
    var _super3 = _createSuper(NotSupportedError);
  
    function NotSupportedError(message) {
      var _this3;
  
      _classCallCheck(this, NotSupportedError);
  
      _this3 = _super3.call(this);
      _this3.code = 3;
      _this3.name = 'NOT_SUPPORTED_ERROR';
      _this3.message = message;
      return _this3;
    }
  
    return NotSupportedError;
  }( /*#__PURE__*/_wrapNativeSuper(Error));
  
  var NotReadyError = /*#__PURE__*/function (_Error4) {
    _inherits(NotReadyError, _Error4);
  
    var _super4 = _createSuper(NotReadyError);
  
    function NotReadyError(message) {
      var _this4;
  
      _classCallCheck(this, NotReadyError);
  
      _this4 = _super4.call(this);
      _this4.code = 4;
      _this4.name = 'NOT_READY_ERROR';
      _this4.message = message;
      return _this4;
    }
  
    return NotReadyError;
  }( /*#__PURE__*/_wrapNativeSuper(Error));
  
  module.exports = {
    ConfigurationError: ConfigurationError,
    InvalidStateError: InvalidStateError,
    NotSupportedError: NotSupportedError,
    NotReadyError: NotReadyError
  };
  },{}],7:[function(require,module,exports){
  "use strict";
  
  module.exports = function () {
    /*
     * Generated by PEG.js 0.7.0.
     *
     * http://pegjs.majda.cz/
     */
    function quote(s) {
      /*
       * ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a
       * string literal except for the closing quote character, backslash,
       * carriage return, line separator, paragraph separator, and line feed.
       * Any character may appear in the form of an escape sequence.
       *
       * For portability, we also escape escape all control and non-ASCII
       * characters. Note that "\0" and "\v" escape sequences are not used
       * because JSHint does not like the first and IE the second.
       */
      return '"' + s.replace(/\\/g, '\\\\') // backslash
      .replace(/"/g, '\\"') // closing quote character
      .replace(/\x08/g, '\\b') // backspace
      .replace(/\t/g, '\\t') // horizontal tab
      .replace(/\n/g, '\\n') // line feed
      .replace(/\f/g, '\\f') // form feed
      .replace(/\r/g, '\\r') // carriage return
      .replace(/[\x00-\x07\x0B\x0E-\x1F\x80-\uFFFF]/g, escape) + '"';
    }
  
    var result = {
      /*
       * Parses the input with a generated parser. If the parsing is successfull,
       * returns a value explicitly or implicitly specified by the grammar from
       * which the parser was generated (see |PEG.buildParser|). If the parsing is
       * unsuccessful, throws |PEG.parser.SyntaxError| describing the error.
       */
      parse: function parse(input, startRule) {
        var parseFunctions = {
          "CRLF": parse_CRLF,
          "DIGIT": parse_DIGIT,
          "ALPHA": parse_ALPHA,
          "HEXDIG": parse_HEXDIG,
          "WSP": parse_WSP,
          "OCTET": parse_OCTET,
          "DQUOTE": parse_DQUOTE,
          "SP": parse_SP,
          "HTAB": parse_HTAB,
          "alphanum": parse_alphanum,
          "reserved": parse_reserved,
          "unreserved": parse_unreserved,
          "mark": parse_mark,
          "escaped": parse_escaped,
          "LWS": parse_LWS,
          "SWS": parse_SWS,
          "HCOLON": parse_HCOLON,
          "TEXT_UTF8_TRIM": parse_TEXT_UTF8_TRIM,
          "TEXT_UTF8char": parse_TEXT_UTF8char,
          "UTF8_NONASCII": parse_UTF8_NONASCII,
          "UTF8_CONT": parse_UTF8_CONT,
          "LHEX": parse_LHEX,
          "token": parse_token,
          "token_nodot": parse_token_nodot,
          "separators": parse_separators,
          "word": parse_word,
          "STAR": parse_STAR,
          "SLASH": parse_SLASH,
          "EQUAL": parse_EQUAL,
          "LPAREN": parse_LPAREN,
          "RPAREN": parse_RPAREN,
          "RAQUOT": parse_RAQUOT,
          "LAQUOT": parse_LAQUOT,
          "COMMA": parse_COMMA,
          "SEMI": parse_SEMI,
          "COLON": parse_COLON,
          "LDQUOT": parse_LDQUOT,
          "RDQUOT": parse_RDQUOT,
          "comment": parse_comment,
          "ctext": parse_ctext,
          "quoted_string": parse_quoted_string,
          "quoted_string_clean": parse_quoted_string_clean,
          "qdtext": parse_qdtext,
          "quoted_pair": parse_quoted_pair,
          "SIP_URI_noparams": parse_SIP_URI_noparams,
          "SIP_URI": parse_SIP_URI,
          "uri_scheme": parse_uri_scheme,
          "uri_scheme_sips": parse_uri_scheme_sips,
          "uri_scheme_sip": parse_uri_scheme_sip,
          "userinfo": parse_userinfo,
          "user": parse_user,
          "user_unreserved": parse_user_unreserved,
          "password": parse_password,
          "hostport": parse_hostport,
          "host": parse_host,
          "hostname": parse_hostname,
          "domainlabel": parse_domainlabel,
          "toplabel": parse_toplabel,
          "IPv6reference": parse_IPv6reference,
          "IPv6address": parse_IPv6address,
          "h16": parse_h16,
          "ls32": parse_ls32,
          "IPv4address": parse_IPv4address,
          "dec_octet": parse_dec_octet,
          "port": parse_port,
          "uri_parameters": parse_uri_parameters,
          "uri_parameter": parse_uri_parameter,
          "transport_param": parse_transport_param,
          "user_param": parse_user_param,
          "method_param": parse_method_param,
          "ttl_param": parse_ttl_param,
          "maddr_param": parse_maddr_param,
          "lr_param": parse_lr_param,
          "other_param": parse_other_param,
          "pname": parse_pname,
          "pvalue": parse_pvalue,
          "paramchar": parse_paramchar,
          "param_unreserved": parse_param_unreserved,
          "headers": parse_headers,
          "header": parse_header,
          "hname": parse_hname,
          "hvalue": parse_hvalue,
          "hnv_unreserved": parse_hnv_unreserved,
          "Request_Response": parse_Request_Response,
          "Request_Line": parse_Request_Line,
          "Request_URI": parse_Request_URI,
          "absoluteURI": parse_absoluteURI,
          "hier_part": parse_hier_part,
          "net_path": parse_net_path,
          "abs_path": parse_abs_path,
          "opaque_part": parse_opaque_part,
          "uric": parse_uric,
          "uric_no_slash": parse_uric_no_slash,
          "path_segments": parse_path_segments,
          "segment": parse_segment,
          "param": parse_param,
          "pchar": parse_pchar,
          "scheme": parse_scheme,
          "authority": parse_authority,
          "srvr": parse_srvr,
          "reg_name": parse_reg_name,
          "query": parse_query,
          "SIP_Version": parse_SIP_Version,
          "INVITEm": parse_INVITEm,
          "ACKm": parse_ACKm,
          "OPTIONSm": parse_OPTIONSm,
          "BYEm": parse_BYEm,
          "CANCELm": parse_CANCELm,
          "REGISTERm": parse_REGISTERm,
          "SUBSCRIBEm": parse_SUBSCRIBEm,
          "NOTIFYm": parse_NOTIFYm,
          "REFERm": parse_REFERm,
          "Method": parse_Method,
          "Status_Line": parse_Status_Line,
          "Status_Code": parse_Status_Code,
          "extension_code": parse_extension_code,
          "Reason_Phrase": parse_Reason_Phrase,
          "Allow_Events": parse_Allow_Events,
          "Call_ID": parse_Call_ID,
          "Contact": parse_Contact,
          "contact_param": parse_contact_param,
          "name_addr": parse_name_addr,
          "display_name": parse_display_name,
          "contact_params": parse_contact_params,
          "c_p_q": parse_c_p_q,
          "c_p_expires": parse_c_p_expires,
          "delta_seconds": parse_delta_seconds,
          "qvalue": parse_qvalue,
          "generic_param": parse_generic_param,
          "gen_value": parse_gen_value,
          "Content_Disposition": parse_Content_Disposition,
          "disp_type": parse_disp_type,
          "disp_param": parse_disp_param,
          "handling_param": parse_handling_param,
          "Content_Encoding": parse_Content_Encoding,
          "Content_Length": parse_Content_Length,
          "Content_Type": parse_Content_Type,
          "media_type": parse_media_type,
          "m_type": parse_m_type,
          "discrete_type": parse_discrete_type,
          "composite_type": parse_composite_type,
          "extension_token": parse_extension_token,
          "x_token": parse_x_token,
          "m_subtype": parse_m_subtype,
          "m_parameter": parse_m_parameter,
          "m_value": parse_m_value,
          "CSeq": parse_CSeq,
          "CSeq_value": parse_CSeq_value,
          "Expires": parse_Expires,
          "Event": parse_Event,
          "event_type": parse_event_type,
          "From": parse_From,
          "from_param": parse_from_param,
          "tag_param": parse_tag_param,
          "Max_Forwards": parse_Max_Forwards,
          "Min_Expires": parse_Min_Expires,
          "Name_Addr_Header": parse_Name_Addr_Header,
          "Proxy_Authenticate": parse_Proxy_Authenticate,
          "challenge": parse_challenge,
          "other_challenge": parse_other_challenge,
          "auth_param": parse_auth_param,
          "digest_cln": parse_digest_cln,
          "realm": parse_realm,
          "realm_value": parse_realm_value,
          "domain": parse_domain,
          "URI": parse_URI,
          "nonce": parse_nonce,
          "nonce_value": parse_nonce_value,
          "opaque": parse_opaque,
          "stale": parse_stale,
          "algorithm": parse_algorithm,
          "qop_options": parse_qop_options,
          "qop_value": parse_qop_value,
          "Proxy_Require": parse_Proxy_Require,
          "Record_Route": parse_Record_Route,
          "rec_route": parse_rec_route,
          "Reason": parse_Reason,
          "reason_param": parse_reason_param,
          "reason_cause": parse_reason_cause,
          "Require": parse_Require,
          "Route": parse_Route,
          "route_param": parse_route_param,
          "Subscription_State": parse_Subscription_State,
          "substate_value": parse_substate_value,
          "subexp_params": parse_subexp_params,
          "event_reason_value": parse_event_reason_value,
          "Subject": parse_Subject,
          "Supported": parse_Supported,
          "To": parse_To,
          "to_param": parse_to_param,
          "Via": parse_Via,
          "via_param": parse_via_param,
          "via_params": parse_via_params,
          "via_ttl": parse_via_ttl,
          "via_maddr": parse_via_maddr,
          "via_received": parse_via_received,
          "via_branch": parse_via_branch,
          "response_port": parse_response_port,
          "sent_protocol": parse_sent_protocol,
          "protocol_name": parse_protocol_name,
          "transport": parse_transport,
          "sent_by": parse_sent_by,
          "via_host": parse_via_host,
          "via_port": parse_via_port,
          "ttl": parse_ttl,
          "WWW_Authenticate": parse_WWW_Authenticate,
          "Session_Expires": parse_Session_Expires,
          "s_e_expires": parse_s_e_expires,
          "s_e_params": parse_s_e_params,
          "s_e_refresher": parse_s_e_refresher,
          "extension_header": parse_extension_header,
          "header_value": parse_header_value,
          "message_body": parse_message_body,
          "uuid_URI": parse_uuid_URI,
          "uuid": parse_uuid,
          "hex4": parse_hex4,
          "hex8": parse_hex8,
          "hex12": parse_hex12,
          "Refer_To": parse_Refer_To,
          "Replaces": parse_Replaces,
          "call_id": parse_call_id,
          "replaces_param": parse_replaces_param,
          "to_tag": parse_to_tag,
          "from_tag": parse_from_tag,
          "early_flag": parse_early_flag
        };
  
        if (startRule !== undefined) {
          if (parseFunctions[startRule] === undefined) {
            throw new Error("Invalid rule name: " + quote(startRule) + ".");
          }
        } else {
          startRule = "CRLF";
        }
  
        var pos = 0;
        var reportFailures = 0;
        var rightmostFailuresPos = 0;
        var rightmostFailuresExpected = [];
  
        function padLeft(input, padding, length) {
          var result = input;
          var padLength = length - input.length;
  
          for (var i = 0; i < padLength; i++) {
            result = padding + result;
          }
  
          return result;
        }
  
        function escape(ch) {
          var charCode = ch.charCodeAt(0);
          var escapeChar;
          var length;
  
          if (charCode <= 0xFF) {
            escapeChar = 'x';
            length = 2;
          } else {
            escapeChar = 'u';
            length = 4;
          }
  
          return '\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length);
        }
  
        function matchFailed(failure) {
          if (pos < rightmostFailuresPos) {
            return;
          }
  
          if (pos > rightmostFailuresPos) {
            rightmostFailuresPos = pos;
            rightmostFailuresExpected = [];
          }
  
          rightmostFailuresExpected.push(failure);
        }
  
        function parse_CRLF() {
          var result0;
  
          if (input.substr(pos, 2) === "\r\n") {
            result0 = "\r\n";
            pos += 2;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"\\r\\n\"");
            }
          }
  
          return result0;
        }
  
        function parse_DIGIT() {
          var result0;
  
          if (/^[0-9]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[0-9]");
            }
          }
  
          return result0;
        }
  
        function parse_ALPHA() {
          var result0;
  
          if (/^[a-zA-Z]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[a-zA-Z]");
            }
          }
  
          return result0;
        }
  
        function parse_HEXDIG() {
          var result0;
  
          if (/^[0-9a-fA-F]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[0-9a-fA-F]");
            }
          }
  
          return result0;
        }
  
        function parse_WSP() {
          var result0;
          result0 = parse_SP();
  
          if (result0 === null) {
            result0 = parse_HTAB();
          }
  
          return result0;
        }
  
        function parse_OCTET() {
          var result0;
  
          if (/^[\0-\xFF]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[\\0-\\xFF]");
            }
          }
  
          return result0;
        }
  
        function parse_DQUOTE() {
          var result0;
  
          if (/^["]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[\"]");
            }
          }
  
          return result0;
        }
  
        function parse_SP() {
          var result0;
  
          if (input.charCodeAt(pos) === 32) {
            result0 = " ";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\" \"");
            }
          }
  
          return result0;
        }
  
        function parse_HTAB() {
          var result0;
  
          if (input.charCodeAt(pos) === 9) {
            result0 = "\t";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"\\t\"");
            }
          }
  
          return result0;
        }
  
        function parse_alphanum() {
          var result0;
  
          if (/^[a-zA-Z0-9]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[a-zA-Z0-9]");
            }
          }
  
          return result0;
        }
  
        function parse_reserved() {
          var result0;
  
          if (input.charCodeAt(pos) === 59) {
            result0 = ";";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\";\"");
            }
          }
  
          if (result0 === null) {
            if (input.charCodeAt(pos) === 47) {
              result0 = "/";
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"/\"");
              }
            }
  
            if (result0 === null) {
              if (input.charCodeAt(pos) === 63) {
                result0 = "?";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"?\"");
                }
              }
  
              if (result0 === null) {
                if (input.charCodeAt(pos) === 58) {
                  result0 = ":";
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\":\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.charCodeAt(pos) === 64) {
                    result0 = "@";
                    pos++;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"@\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.charCodeAt(pos) === 38) {
                      result0 = "&";
                      pos++;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"&\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.charCodeAt(pos) === 61) {
                        result0 = "=";
                        pos++;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"=\"");
                        }
                      }
  
                      if (result0 === null) {
                        if (input.charCodeAt(pos) === 43) {
                          result0 = "+";
                          pos++;
                        } else {
                          result0 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"+\"");
                          }
                        }
  
                        if (result0 === null) {
                          if (input.charCodeAt(pos) === 36) {
                            result0 = "$";
                            pos++;
                          } else {
                            result0 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"$\"");
                            }
                          }
  
                          if (result0 === null) {
                            if (input.charCodeAt(pos) === 44) {
                              result0 = ",";
                              pos++;
                            } else {
                              result0 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\",\"");
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_unreserved() {
          var result0;
          result0 = parse_alphanum();
  
          if (result0 === null) {
            result0 = parse_mark();
          }
  
          return result0;
        }
  
        function parse_mark() {
          var result0;
  
          if (input.charCodeAt(pos) === 45) {
            result0 = "-";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"-\"");
            }
          }
  
          if (result0 === null) {
            if (input.charCodeAt(pos) === 95) {
              result0 = "_";
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"_\"");
              }
            }
  
            if (result0 === null) {
              if (input.charCodeAt(pos) === 46) {
                result0 = ".";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\".\"");
                }
              }
  
              if (result0 === null) {
                if (input.charCodeAt(pos) === 33) {
                  result0 = "!";
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"!\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.charCodeAt(pos) === 126) {
                    result0 = "~";
                    pos++;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"~\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.charCodeAt(pos) === 42) {
                      result0 = "*";
                      pos++;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"*\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.charCodeAt(pos) === 39) {
                        result0 = "'";
                        pos++;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"'\"");
                        }
                      }
  
                      if (result0 === null) {
                        if (input.charCodeAt(pos) === 40) {
                          result0 = "(";
                          pos++;
                        } else {
                          result0 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"(\"");
                          }
                        }
  
                        if (result0 === null) {
                          if (input.charCodeAt(pos) === 41) {
                            result0 = ")";
                            pos++;
                          } else {
                            result0 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\")\"");
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_escaped() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.charCodeAt(pos) === 37) {
            result0 = "%";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"%\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_HEXDIG();
  
            if (result1 !== null) {
              result2 = parse_HEXDIG();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, escaped) {
              return escaped.join('');
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_LWS() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          pos2 = pos;
          result0 = [];
          result1 = parse_WSP();
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_WSP();
          }
  
          if (result0 !== null) {
            result1 = parse_CRLF();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos2;
            }
          } else {
            result0 = null;
            pos = pos2;
          }
  
          result0 = result0 !== null ? result0 : "";
  
          if (result0 !== null) {
            result2 = parse_WSP();
  
            if (result2 !== null) {
              result1 = [];
  
              while (result2 !== null) {
                result1.push(result2);
                result2 = parse_WSP();
              }
            } else {
              result1 = null;
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return " ";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_SWS() {
          var result0;
          result0 = parse_LWS();
          result0 = result0 !== null ? result0 : "";
          return result0;
        }
  
        function parse_HCOLON() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = [];
          result1 = parse_SP();
  
          if (result1 === null) {
            result1 = parse_HTAB();
          }
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_SP();
  
            if (result1 === null) {
              result1 = parse_HTAB();
            }
          }
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return ':';
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_TEXT_UTF8_TRIM() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result1 = parse_TEXT_UTF8char();
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_TEXT_UTF8char();
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = [];
            result3 = parse_LWS();
  
            while (result3 !== null) {
              result2.push(result3);
              result3 = parse_LWS();
            }
  
            if (result2 !== null) {
              result3 = parse_TEXT_UTF8char();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = [];
              result3 = parse_LWS();
  
              while (result3 !== null) {
                result2.push(result3);
                result3 = parse_LWS();
              }
  
              if (result2 !== null) {
                result3 = parse_TEXT_UTF8char();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_TEXT_UTF8char() {
          var result0;
  
          if (/^[!-~]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[!-~]");
            }
          }
  
          if (result0 === null) {
            result0 = parse_UTF8_NONASCII();
          }
  
          return result0;
        }
  
        function parse_UTF8_NONASCII() {
          var result0;
  
          if (/^[\x80-\uFFFF]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[\\x80-\\uFFFF]");
            }
          }
  
          return result0;
        }
  
        function parse_UTF8_CONT() {
          var result0;
  
          if (/^[\x80-\xBF]/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[\\x80-\\xBF]");
            }
          }
  
          return result0;
        }
  
        function parse_LHEX() {
          var result0;
          result0 = parse_DIGIT();
  
          if (result0 === null) {
            if (/^[a-f]/.test(input.charAt(pos))) {
              result0 = input.charAt(pos);
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("[a-f]");
              }
            }
          }
  
          return result0;
        }
  
        function parse_token() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_alphanum();
  
          if (result1 === null) {
            if (input.charCodeAt(pos) === 45) {
              result1 = "-";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"-\"");
              }
            }
  
            if (result1 === null) {
              if (input.charCodeAt(pos) === 46) {
                result1 = ".";
                pos++;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\".\"");
                }
              }
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 33) {
                  result1 = "!";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"!\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 37) {
                    result1 = "%";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"%\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 42) {
                      result1 = "*";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"*\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 95) {
                        result1 = "_";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"_\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 43) {
                          result1 = "+";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"+\"");
                          }
                        }
  
                        if (result1 === null) {
                          if (input.charCodeAt(pos) === 96) {
                            result1 = "`";
                            pos++;
                          } else {
                            result1 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"`\"");
                            }
                          }
  
                          if (result1 === null) {
                            if (input.charCodeAt(pos) === 39) {
                              result1 = "'";
                              pos++;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"'\"");
                              }
                            }
  
                            if (result1 === null) {
                              if (input.charCodeAt(pos) === 126) {
                                result1 = "~";
                                pos++;
                              } else {
                                result1 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\"~\"");
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_alphanum();
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 45) {
                  result1 = "-";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"-\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 46) {
                    result1 = ".";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\".\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 33) {
                      result1 = "!";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"!\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 37) {
                        result1 = "%";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"%\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 42) {
                          result1 = "*";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"*\"");
                          }
                        }
  
                        if (result1 === null) {
                          if (input.charCodeAt(pos) === 95) {
                            result1 = "_";
                            pos++;
                          } else {
                            result1 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"_\"");
                            }
                          }
  
                          if (result1 === null) {
                            if (input.charCodeAt(pos) === 43) {
                              result1 = "+";
                              pos++;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"+\"");
                              }
                            }
  
                            if (result1 === null) {
                              if (input.charCodeAt(pos) === 96) {
                                result1 = "`";
                                pos++;
                              } else {
                                result1 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\"`\"");
                                }
                              }
  
                              if (result1 === null) {
                                if (input.charCodeAt(pos) === 39) {
                                  result1 = "'";
                                  pos++;
                                } else {
                                  result1 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\"'\"");
                                  }
                                }
  
                                if (result1 === null) {
                                  if (input.charCodeAt(pos) === 126) {
                                    result1 = "~";
                                    pos++;
                                  } else {
                                    result1 = null;
  
                                    if (reportFailures === 0) {
                                      matchFailed("\"~\"");
                                    }
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_token_nodot() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_alphanum();
  
          if (result1 === null) {
            if (input.charCodeAt(pos) === 45) {
              result1 = "-";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"-\"");
              }
            }
  
            if (result1 === null) {
              if (input.charCodeAt(pos) === 33) {
                result1 = "!";
                pos++;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"!\"");
                }
              }
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 37) {
                  result1 = "%";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"%\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 42) {
                    result1 = "*";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"*\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 95) {
                      result1 = "_";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"_\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 43) {
                        result1 = "+";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"+\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 96) {
                          result1 = "`";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"`\"");
                          }
                        }
  
                        if (result1 === null) {
                          if (input.charCodeAt(pos) === 39) {
                            result1 = "'";
                            pos++;
                          } else {
                            result1 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"'\"");
                            }
                          }
  
                          if (result1 === null) {
                            if (input.charCodeAt(pos) === 126) {
                              result1 = "~";
                              pos++;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"~\"");
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_alphanum();
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 45) {
                  result1 = "-";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"-\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 33) {
                    result1 = "!";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"!\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 37) {
                      result1 = "%";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"%\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 42) {
                        result1 = "*";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"*\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 95) {
                          result1 = "_";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"_\"");
                          }
                        }
  
                        if (result1 === null) {
                          if (input.charCodeAt(pos) === 43) {
                            result1 = "+";
                            pos++;
                          } else {
                            result1 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"+\"");
                            }
                          }
  
                          if (result1 === null) {
                            if (input.charCodeAt(pos) === 96) {
                              result1 = "`";
                              pos++;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"`\"");
                              }
                            }
  
                            if (result1 === null) {
                              if (input.charCodeAt(pos) === 39) {
                                result1 = "'";
                                pos++;
                              } else {
                                result1 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\"'\"");
                                }
                              }
  
                              if (result1 === null) {
                                if (input.charCodeAt(pos) === 126) {
                                  result1 = "~";
                                  pos++;
                                } else {
                                  result1 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\"~\"");
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_separators() {
          var result0;
  
          if (input.charCodeAt(pos) === 40) {
            result0 = "(";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"(\"");
            }
          }
  
          if (result0 === null) {
            if (input.charCodeAt(pos) === 41) {
              result0 = ")";
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\")\"");
              }
            }
  
            if (result0 === null) {
              if (input.charCodeAt(pos) === 60) {
                result0 = "<";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"<\"");
                }
              }
  
              if (result0 === null) {
                if (input.charCodeAt(pos) === 62) {
                  result0 = ">";
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\">\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.charCodeAt(pos) === 64) {
                    result0 = "@";
                    pos++;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"@\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.charCodeAt(pos) === 44) {
                      result0 = ",";
                      pos++;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\",\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.charCodeAt(pos) === 59) {
                        result0 = ";";
                        pos++;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\";\"");
                        }
                      }
  
                      if (result0 === null) {
                        if (input.charCodeAt(pos) === 58) {
                          result0 = ":";
                          pos++;
                        } else {
                          result0 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\":\"");
                          }
                        }
  
                        if (result0 === null) {
                          if (input.charCodeAt(pos) === 92) {
                            result0 = "\\";
                            pos++;
                          } else {
                            result0 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"\\\\\"");
                            }
                          }
  
                          if (result0 === null) {
                            result0 = parse_DQUOTE();
  
                            if (result0 === null) {
                              if (input.charCodeAt(pos) === 47) {
                                result0 = "/";
                                pos++;
                              } else {
                                result0 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\"/\"");
                                }
                              }
  
                              if (result0 === null) {
                                if (input.charCodeAt(pos) === 91) {
                                  result0 = "[";
                                  pos++;
                                } else {
                                  result0 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\"[\"");
                                  }
                                }
  
                                if (result0 === null) {
                                  if (input.charCodeAt(pos) === 93) {
                                    result0 = "]";
                                    pos++;
                                  } else {
                                    result0 = null;
  
                                    if (reportFailures === 0) {
                                      matchFailed("\"]\"");
                                    }
                                  }
  
                                  if (result0 === null) {
                                    if (input.charCodeAt(pos) === 63) {
                                      result0 = "?";
                                      pos++;
                                    } else {
                                      result0 = null;
  
                                      if (reportFailures === 0) {
                                        matchFailed("\"?\"");
                                      }
                                    }
  
                                    if (result0 === null) {
                                      if (input.charCodeAt(pos) === 61) {
                                        result0 = "=";
                                        pos++;
                                      } else {
                                        result0 = null;
  
                                        if (reportFailures === 0) {
                                          matchFailed("\"=\"");
                                        }
                                      }
  
                                      if (result0 === null) {
                                        if (input.charCodeAt(pos) === 123) {
                                          result0 = "{";
                                          pos++;
                                        } else {
                                          result0 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\"{\"");
                                          }
                                        }
  
                                        if (result0 === null) {
                                          if (input.charCodeAt(pos) === 125) {
                                            result0 = "}";
                                            pos++;
                                          } else {
                                            result0 = null;
  
                                            if (reportFailures === 0) {
                                              matchFailed("\"}\"");
                                            }
                                          }
  
                                          if (result0 === null) {
                                            result0 = parse_SP();
  
                                            if (result0 === null) {
                                              result0 = parse_HTAB();
                                            }
                                          }
                                        }
                                      }
                                    }
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_word() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_alphanum();
  
          if (result1 === null) {
            if (input.charCodeAt(pos) === 45) {
              result1 = "-";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"-\"");
              }
            }
  
            if (result1 === null) {
              if (input.charCodeAt(pos) === 46) {
                result1 = ".";
                pos++;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\".\"");
                }
              }
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 33) {
                  result1 = "!";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"!\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 37) {
                    result1 = "%";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"%\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 42) {
                      result1 = "*";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"*\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 95) {
                        result1 = "_";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"_\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 43) {
                          result1 = "+";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"+\"");
                          }
                        }
  
                        if (result1 === null) {
                          if (input.charCodeAt(pos) === 96) {
                            result1 = "`";
                            pos++;
                          } else {
                            result1 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"`\"");
                            }
                          }
  
                          if (result1 === null) {
                            if (input.charCodeAt(pos) === 39) {
                              result1 = "'";
                              pos++;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"'\"");
                              }
                            }
  
                            if (result1 === null) {
                              if (input.charCodeAt(pos) === 126) {
                                result1 = "~";
                                pos++;
                              } else {
                                result1 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\"~\"");
                                }
                              }
  
                              if (result1 === null) {
                                if (input.charCodeAt(pos) === 40) {
                                  result1 = "(";
                                  pos++;
                                } else {
                                  result1 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\"(\"");
                                  }
                                }
  
                                if (result1 === null) {
                                  if (input.charCodeAt(pos) === 41) {
                                    result1 = ")";
                                    pos++;
                                  } else {
                                    result1 = null;
  
                                    if (reportFailures === 0) {
                                      matchFailed("\")\"");
                                    }
                                  }
  
                                  if (result1 === null) {
                                    if (input.charCodeAt(pos) === 60) {
                                      result1 = "<";
                                      pos++;
                                    } else {
                                      result1 = null;
  
                                      if (reportFailures === 0) {
                                        matchFailed("\"<\"");
                                      }
                                    }
  
                                    if (result1 === null) {
                                      if (input.charCodeAt(pos) === 62) {
                                        result1 = ">";
                                        pos++;
                                      } else {
                                        result1 = null;
  
                                        if (reportFailures === 0) {
                                          matchFailed("\">\"");
                                        }
                                      }
  
                                      if (result1 === null) {
                                        if (input.charCodeAt(pos) === 58) {
                                          result1 = ":";
                                          pos++;
                                        } else {
                                          result1 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\":\"");
                                          }
                                        }
  
                                        if (result1 === null) {
                                          if (input.charCodeAt(pos) === 92) {
                                            result1 = "\\";
                                            pos++;
                                          } else {
                                            result1 = null;
  
                                            if (reportFailures === 0) {
                                              matchFailed("\"\\\\\"");
                                            }
                                          }
  
                                          if (result1 === null) {
                                            result1 = parse_DQUOTE();
  
                                            if (result1 === null) {
                                              if (input.charCodeAt(pos) === 47) {
                                                result1 = "/";
                                                pos++;
                                              } else {
                                                result1 = null;
  
                                                if (reportFailures === 0) {
                                                  matchFailed("\"/\"");
                                                }
                                              }
  
                                              if (result1 === null) {
                                                if (input.charCodeAt(pos) === 91) {
                                                  result1 = "[";
                                                  pos++;
                                                } else {
                                                  result1 = null;
  
                                                  if (reportFailures === 0) {
                                                    matchFailed("\"[\"");
                                                  }
                                                }
  
                                                if (result1 === null) {
                                                  if (input.charCodeAt(pos) === 93) {
                                                    result1 = "]";
                                                    pos++;
                                                  } else {
                                                    result1 = null;
  
                                                    if (reportFailures === 0) {
                                                      matchFailed("\"]\"");
                                                    }
                                                  }
  
                                                  if (result1 === null) {
                                                    if (input.charCodeAt(pos) === 63) {
                                                      result1 = "?";
                                                      pos++;
                                                    } else {
                                                      result1 = null;
  
                                                      if (reportFailures === 0) {
                                                        matchFailed("\"?\"");
                                                      }
                                                    }
  
                                                    if (result1 === null) {
                                                      if (input.charCodeAt(pos) === 123) {
                                                        result1 = "{";
                                                        pos++;
                                                      } else {
                                                        result1 = null;
  
                                                        if (reportFailures === 0) {
                                                          matchFailed("\"{\"");
                                                        }
                                                      }
  
                                                      if (result1 === null) {
                                                        if (input.charCodeAt(pos) === 125) {
                                                          result1 = "}";
                                                          pos++;
                                                        } else {
                                                          result1 = null;
  
                                                          if (reportFailures === 0) {
                                                            matchFailed("\"}\"");
                                                          }
                                                        }
                                                      }
                                                    }
                                                  }
                                                }
                                              }
                                            }
                                          }
                                        }
                                      }
                                    }
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_alphanum();
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 45) {
                  result1 = "-";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"-\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 46) {
                    result1 = ".";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\".\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 33) {
                      result1 = "!";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"!\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 37) {
                        result1 = "%";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"%\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 42) {
                          result1 = "*";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"*\"");
                          }
                        }
  
                        if (result1 === null) {
                          if (input.charCodeAt(pos) === 95) {
                            result1 = "_";
                            pos++;
                          } else {
                            result1 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"_\"");
                            }
                          }
  
                          if (result1 === null) {
                            if (input.charCodeAt(pos) === 43) {
                              result1 = "+";
                              pos++;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"+\"");
                              }
                            }
  
                            if (result1 === null) {
                              if (input.charCodeAt(pos) === 96) {
                                result1 = "`";
                                pos++;
                              } else {
                                result1 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\"`\"");
                                }
                              }
  
                              if (result1 === null) {
                                if (input.charCodeAt(pos) === 39) {
                                  result1 = "'";
                                  pos++;
                                } else {
                                  result1 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\"'\"");
                                  }
                                }
  
                                if (result1 === null) {
                                  if (input.charCodeAt(pos) === 126) {
                                    result1 = "~";
                                    pos++;
                                  } else {
                                    result1 = null;
  
                                    if (reportFailures === 0) {
                                      matchFailed("\"~\"");
                                    }
                                  }
  
                                  if (result1 === null) {
                                    if (input.charCodeAt(pos) === 40) {
                                      result1 = "(";
                                      pos++;
                                    } else {
                                      result1 = null;
  
                                      if (reportFailures === 0) {
                                        matchFailed("\"(\"");
                                      }
                                    }
  
                                    if (result1 === null) {
                                      if (input.charCodeAt(pos) === 41) {
                                        result1 = ")";
                                        pos++;
                                      } else {
                                        result1 = null;
  
                                        if (reportFailures === 0) {
                                          matchFailed("\")\"");
                                        }
                                      }
  
                                      if (result1 === null) {
                                        if (input.charCodeAt(pos) === 60) {
                                          result1 = "<";
                                          pos++;
                                        } else {
                                          result1 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\"<\"");
                                          }
                                        }
  
                                        if (result1 === null) {
                                          if (input.charCodeAt(pos) === 62) {
                                            result1 = ">";
                                            pos++;
                                          } else {
                                            result1 = null;
  
                                            if (reportFailures === 0) {
                                              matchFailed("\">\"");
                                            }
                                          }
  
                                          if (result1 === null) {
                                            if (input.charCodeAt(pos) === 58) {
                                              result1 = ":";
                                              pos++;
                                            } else {
                                              result1 = null;
  
                                              if (reportFailures === 0) {
                                                matchFailed("\":\"");
                                              }
                                            }
  
                                            if (result1 === null) {
                                              if (input.charCodeAt(pos) === 92) {
                                                result1 = "\\";
                                                pos++;
                                              } else {
                                                result1 = null;
  
                                                if (reportFailures === 0) {
                                                  matchFailed("\"\\\\\"");
                                                }
                                              }
  
                                              if (result1 === null) {
                                                result1 = parse_DQUOTE();
  
                                                if (result1 === null) {
                                                  if (input.charCodeAt(pos) === 47) {
                                                    result1 = "/";
                                                    pos++;
                                                  } else {
                                                    result1 = null;
  
                                                    if (reportFailures === 0) {
                                                      matchFailed("\"/\"");
                                                    }
                                                  }
  
                                                  if (result1 === null) {
                                                    if (input.charCodeAt(pos) === 91) {
                                                      result1 = "[";
                                                      pos++;
                                                    } else {
                                                      result1 = null;
  
                                                      if (reportFailures === 0) {
                                                        matchFailed("\"[\"");
                                                      }
                                                    }
  
                                                    if (result1 === null) {
                                                      if (input.charCodeAt(pos) === 93) {
                                                        result1 = "]";
                                                        pos++;
                                                      } else {
                                                        result1 = null;
  
                                                        if (reportFailures === 0) {
                                                          matchFailed("\"]\"");
                                                        }
                                                      }
  
                                                      if (result1 === null) {
                                                        if (input.charCodeAt(pos) === 63) {
                                                          result1 = "?";
                                                          pos++;
                                                        } else {
                                                          result1 = null;
  
                                                          if (reportFailures === 0) {
                                                            matchFailed("\"?\"");
                                                          }
                                                        }
  
                                                        if (result1 === null) {
                                                          if (input.charCodeAt(pos) === 123) {
                                                            result1 = "{";
                                                            pos++;
                                                          } else {
                                                            result1 = null;
  
                                                            if (reportFailures === 0) {
                                                              matchFailed("\"{\"");
                                                            }
                                                          }
  
                                                          if (result1 === null) {
                                                            if (input.charCodeAt(pos) === 125) {
                                                              result1 = "}";
                                                              pos++;
                                                            } else {
                                                              result1 = null;
  
                                                              if (reportFailures === 0) {
                                                                matchFailed("\"}\"");
                                                              }
                                                            }
                                                          }
                                                        }
                                                      }
                                                    }
                                                  }
                                                }
                                              }
                                            }
                                          }
                                        }
                                      }
                                    }
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_STAR() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 42) {
              result1 = "*";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"*\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return "*";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_SLASH() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 47) {
              result1 = "/";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"/\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return "/";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_EQUAL() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 61) {
              result1 = "=";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"=\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return "=";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_LPAREN() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 40) {
              result1 = "(";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"(\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return "(";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_RPAREN() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 41) {
              result1 = ")";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\")\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return ")";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_RAQUOT() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.charCodeAt(pos) === 62) {
            result0 = ">";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\">\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_SWS();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return ">";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_LAQUOT() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 60) {
              result1 = "<";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"<\"");
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return "<";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_COMMA() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 44) {
              result1 = ",";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\",\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return ",";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_SEMI() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 59) {
              result1 = ";";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\";\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return ";";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_COLON() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_SWS();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return ":";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_LDQUOT() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            result1 = parse_DQUOTE();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return "\"";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_RDQUOT() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_DQUOTE();
  
          if (result0 !== null) {
            result1 = parse_SWS();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return "\"";
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_comment() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_LPAREN();
  
          if (result0 !== null) {
            result1 = [];
            result2 = parse_ctext();
  
            if (result2 === null) {
              result2 = parse_quoted_pair();
  
              if (result2 === null) {
                result2 = parse_comment();
              }
            }
  
            while (result2 !== null) {
              result1.push(result2);
              result2 = parse_ctext();
  
              if (result2 === null) {
                result2 = parse_quoted_pair();
  
                if (result2 === null) {
                  result2 = parse_comment();
                }
              }
            }
  
            if (result1 !== null) {
              result2 = parse_RPAREN();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_ctext() {
          var result0;
  
          if (/^[!-']/.test(input.charAt(pos))) {
            result0 = input.charAt(pos);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("[!-']");
            }
          }
  
          if (result0 === null) {
            if (/^[*-[]/.test(input.charAt(pos))) {
              result0 = input.charAt(pos);
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("[*-[]");
              }
            }
  
            if (result0 === null) {
              if (/^[\]-~]/.test(input.charAt(pos))) {
                result0 = input.charAt(pos);
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("[\\]-~]");
                }
              }
  
              if (result0 === null) {
                result0 = parse_UTF8_NONASCII();
  
                if (result0 === null) {
                  result0 = parse_LWS();
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_quoted_string() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            result1 = parse_DQUOTE();
  
            if (result1 !== null) {
              result2 = [];
              result3 = parse_qdtext();
  
              if (result3 === null) {
                result3 = parse_quoted_pair();
              }
  
              while (result3 !== null) {
                result2.push(result3);
                result3 = parse_qdtext();
  
                if (result3 === null) {
                  result3 = parse_quoted_pair();
                }
              }
  
              if (result2 !== null) {
                result3 = parse_DQUOTE();
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_quoted_string_clean() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SWS();
  
          if (result0 !== null) {
            result1 = parse_DQUOTE();
  
            if (result1 !== null) {
              result2 = [];
              result3 = parse_qdtext();
  
              if (result3 === null) {
                result3 = parse_quoted_pair();
              }
  
              while (result3 !== null) {
                result2.push(result3);
                result3 = parse_qdtext();
  
                if (result3 === null) {
                  result3 = parse_quoted_pair();
                }
              }
  
              if (result2 !== null) {
                result3 = parse_DQUOTE();
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              var trimmed = input.substring(pos, offset).trim();
              return trimmed.substring(1, trimmed.length - 1) // remove outer quotes
              .replace(/\\([\x00-\x09\x0b-\x0c\x0e-\x7f])/g, '$1');
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_qdtext() {
          var result0;
          result0 = parse_LWS();
  
          if (result0 === null) {
            if (input.charCodeAt(pos) === 33) {
              result0 = "!";
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"!\"");
              }
            }
  
            if (result0 === null) {
              if (/^[#-[]/.test(input.charAt(pos))) {
                result0 = input.charAt(pos);
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("[#-[]");
                }
              }
  
              if (result0 === null) {
                if (/^[\]-~]/.test(input.charAt(pos))) {
                  result0 = input.charAt(pos);
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("[\\]-~]");
                  }
                }
  
                if (result0 === null) {
                  result0 = parse_UTF8_NONASCII();
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_quoted_pair() {
          var result0, result1;
          var pos0;
          pos0 = pos;
  
          if (input.charCodeAt(pos) === 92) {
            result0 = "\\";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"\\\\\"");
            }
          }
  
          if (result0 !== null) {
            if (/^[\0-\t]/.test(input.charAt(pos))) {
              result1 = input.charAt(pos);
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("[\\0-\\t]");
              }
            }
  
            if (result1 === null) {
              if (/^[\x0B-\f]/.test(input.charAt(pos))) {
                result1 = input.charAt(pos);
                pos++;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("[\\x0B-\\f]");
                }
              }
  
              if (result1 === null) {
                if (/^[\x0E-]/.test(input.charAt(pos))) {
                  result1 = input.charAt(pos);
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("[\\x0E-]");
                  }
                }
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_SIP_URI_noparams() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_uri_scheme();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_userinfo();
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result3 = parse_hostport();
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              try {
                data.uri = new URI(data.scheme, data.user, data.host, data.port);
                delete data.scheme;
                delete data.user;
                delete data.host;
                delete data.host_type;
                delete data.port;
              } catch (e) {
                data = -1;
              }
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_SIP_URI() {
          var result0, result1, result2, result3, result4, result5;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_uri_scheme();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_userinfo();
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result3 = parse_hostport();
  
                if (result3 !== null) {
                  result4 = parse_uri_parameters();
  
                  if (result4 !== null) {
                    result5 = parse_headers();
                    result5 = result5 !== null ? result5 : "";
  
                    if (result5 !== null) {
                      result0 = [result0, result1, result2, result3, result4, result5];
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              var header;
  
              try {
                data.uri = new URI(data.scheme, data.user, data.host, data.port, data.uri_params, data.uri_headers);
                delete data.scheme;
                delete data.user;
                delete data.host;
                delete data.host_type;
                delete data.port;
                delete data.uri_params;
  
                if (startRule === 'SIP_URI') {
                  data = data.uri;
                }
              } catch (e) {
                data = -1;
              }
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_uri_scheme() {
          var result0;
          result0 = parse_uri_scheme_sips();
  
          if (result0 === null) {
            result0 = parse_uri_scheme_sip();
          }
  
          return result0;
        }
  
        function parse_uri_scheme_sips() {
          var result0;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 4).toLowerCase() === "sips") {
            result0 = input.substr(pos, 4);
            pos += 4;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"sips\"");
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset, scheme) {
              data.scheme = scheme.toLowerCase();
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_uri_scheme_sip() {
          var result0;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 3).toLowerCase() === "sip") {
            result0 = input.substr(pos, 3);
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"sip\"");
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset, scheme) {
              data.scheme = scheme.toLowerCase();
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_userinfo() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_user();
  
          if (result0 !== null) {
            pos2 = pos;
  
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_password();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              if (input.charCodeAt(pos) === 64) {
                result2 = "@";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"@\"");
                }
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.user = decodeURIComponent(input.substring(pos - 1, offset));
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_user() {
          var result0, result1;
          result1 = parse_unreserved();
  
          if (result1 === null) {
            result1 = parse_escaped();
  
            if (result1 === null) {
              result1 = parse_user_unreserved();
            }
          }
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_unreserved();
  
              if (result1 === null) {
                result1 = parse_escaped();
  
                if (result1 === null) {
                  result1 = parse_user_unreserved();
                }
              }
            }
          } else {
            result0 = null;
          }
  
          return result0;
        }
  
        function parse_user_unreserved() {
          var result0;
  
          if (input.charCodeAt(pos) === 38) {
            result0 = "&";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"&\"");
            }
          }
  
          if (result0 === null) {
            if (input.charCodeAt(pos) === 61) {
              result0 = "=";
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"=\"");
              }
            }
  
            if (result0 === null) {
              if (input.charCodeAt(pos) === 43) {
                result0 = "+";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"+\"");
                }
              }
  
              if (result0 === null) {
                if (input.charCodeAt(pos) === 36) {
                  result0 = "$";
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"$\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.charCodeAt(pos) === 44) {
                    result0 = ",";
                    pos++;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\",\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.charCodeAt(pos) === 59) {
                      result0 = ";";
                      pos++;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\";\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.charCodeAt(pos) === 63) {
                        result0 = "?";
                        pos++;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"?\"");
                        }
                      }
  
                      if (result0 === null) {
                        if (input.charCodeAt(pos) === 47) {
                          result0 = "/";
                          pos++;
                        } else {
                          result0 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"/\"");
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_password() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result0 = [];
          result1 = parse_unreserved();
  
          if (result1 === null) {
            result1 = parse_escaped();
  
            if (result1 === null) {
              if (input.charCodeAt(pos) === 38) {
                result1 = "&";
                pos++;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"&\"");
                }
              }
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 61) {
                  result1 = "=";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"=\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 43) {
                    result1 = "+";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"+\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 36) {
                      result1 = "$";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"$\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 44) {
                        result1 = ",";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\",\"");
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_unreserved();
  
            if (result1 === null) {
              result1 = parse_escaped();
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 38) {
                  result1 = "&";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"&\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 61) {
                    result1 = "=";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"=\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 43) {
                      result1 = "+";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"+\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 36) {
                        result1 = "$";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"$\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 44) {
                          result1 = ",";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\",\"");
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.password = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_hostport() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_host();
  
          if (result0 !== null) {
            pos1 = pos;
  
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_port();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos1;
              }
            } else {
              result1 = null;
              pos = pos1;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_host() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_hostname();
  
          if (result0 === null) {
            result0 = parse_IPv4address();
  
            if (result0 === null) {
              result0 = parse_IPv6reference();
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.host = input.substring(pos, offset).toLowerCase();
              return data.host;
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_hostname() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = [];
          pos2 = pos;
          result1 = parse_domainlabel();
  
          if (result1 !== null) {
            if (input.charCodeAt(pos) === 46) {
              result2 = ".";
              pos++;
            } else {
              result2 = null;
  
              if (reportFailures === 0) {
                matchFailed("\".\"");
              }
            }
  
            if (result2 !== null) {
              result1 = [result1, result2];
            } else {
              result1 = null;
              pos = pos2;
            }
          } else {
            result1 = null;
            pos = pos2;
          }
  
          while (result1 !== null) {
            result0.push(result1);
            pos2 = pos;
            result1 = parse_domainlabel();
  
            if (result1 !== null) {
              if (input.charCodeAt(pos) === 46) {
                result2 = ".";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\".\"");
                }
              }
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
          }
  
          if (result0 !== null) {
            result1 = parse_toplabel();
  
            if (result1 !== null) {
              if (input.charCodeAt(pos) === 46) {
                result2 = ".";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\".\"");
                }
              }
  
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.host_type = 'domain';
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_domainlabel() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_alphanum();
  
          if (result0 !== null) {
            result1 = [];
            result2 = parse_alphanum();
  
            if (result2 === null) {
              if (input.charCodeAt(pos) === 45) {
                result2 = "-";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"-\"");
                }
              }
  
              if (result2 === null) {
                if (input.charCodeAt(pos) === 95) {
                  result2 = "_";
                  pos++;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"_\"");
                  }
                }
              }
            }
  
            while (result2 !== null) {
              result1.push(result2);
              result2 = parse_alphanum();
  
              if (result2 === null) {
                if (input.charCodeAt(pos) === 45) {
                  result2 = "-";
                  pos++;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"-\"");
                  }
                }
  
                if (result2 === null) {
                  if (input.charCodeAt(pos) === 95) {
                    result2 = "_";
                    pos++;
                  } else {
                    result2 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"_\"");
                    }
                  }
                }
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_toplabel() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_ALPHA();
  
          if (result0 !== null) {
            result1 = [];
            result2 = parse_alphanum();
  
            if (result2 === null) {
              if (input.charCodeAt(pos) === 45) {
                result2 = "-";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"-\"");
                }
              }
  
              if (result2 === null) {
                if (input.charCodeAt(pos) === 95) {
                  result2 = "_";
                  pos++;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"_\"");
                  }
                }
              }
            }
  
            while (result2 !== null) {
              result1.push(result2);
              result2 = parse_alphanum();
  
              if (result2 === null) {
                if (input.charCodeAt(pos) === 45) {
                  result2 = "-";
                  pos++;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"-\"");
                  }
                }
  
                if (result2 === null) {
                  if (input.charCodeAt(pos) === 95) {
                    result2 = "_";
                    pos++;
                  } else {
                    result2 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"_\"");
                    }
                  }
                }
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_IPv6reference() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.charCodeAt(pos) === 91) {
            result0 = "[";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"[\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_IPv6address();
  
            if (result1 !== null) {
              if (input.charCodeAt(pos) === 93) {
                result2 = "]";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"]\"");
                }
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.host_type = 'IPv6';
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_IPv6address() {
          var result0, result1, result2, result3, result4, result5, result6, result7, result8, result9, result10, result11, result12;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_h16();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_h16();
  
              if (result2 !== null) {
                if (input.charCodeAt(pos) === 58) {
                  result3 = ":";
                  pos++;
                } else {
                  result3 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\":\"");
                  }
                }
  
                if (result3 !== null) {
                  result4 = parse_h16();
  
                  if (result4 !== null) {
                    if (input.charCodeAt(pos) === 58) {
                      result5 = ":";
                      pos++;
                    } else {
                      result5 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\":\"");
                      }
                    }
  
                    if (result5 !== null) {
                      result6 = parse_h16();
  
                      if (result6 !== null) {
                        if (input.charCodeAt(pos) === 58) {
                          result7 = ":";
                          pos++;
                        } else {
                          result7 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\":\"");
                          }
                        }
  
                        if (result7 !== null) {
                          result8 = parse_h16();
  
                          if (result8 !== null) {
                            if (input.charCodeAt(pos) === 58) {
                              result9 = ":";
                              pos++;
                            } else {
                              result9 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\":\"");
                              }
                            }
  
                            if (result9 !== null) {
                              result10 = parse_h16();
  
                              if (result10 !== null) {
                                if (input.charCodeAt(pos) === 58) {
                                  result11 = ":";
                                  pos++;
                                } else {
                                  result11 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\":\"");
                                  }
                                }
  
                                if (result11 !== null) {
                                  result12 = parse_ls32();
  
                                  if (result12 !== null) {
                                    result0 = [result0, result1, result2, result3, result4, result5, result6, result7, result8, result9, result10, result11, result12];
                                  } else {
                                    result0 = null;
                                    pos = pos1;
                                  }
                                } else {
                                  result0 = null;
                                  pos = pos1;
                                }
                              } else {
                                result0 = null;
                                pos = pos1;
                              }
                            } else {
                              result0 = null;
                              pos = pos1;
                            }
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 === null) {
            pos1 = pos;
  
            if (input.substr(pos, 2) === "::") {
              result0 = "::";
              pos += 2;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"::\"");
              }
            }
  
            if (result0 !== null) {
              result1 = parse_h16();
  
              if (result1 !== null) {
                if (input.charCodeAt(pos) === 58) {
                  result2 = ":";
                  pos++;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\":\"");
                  }
                }
  
                if (result2 !== null) {
                  result3 = parse_h16();
  
                  if (result3 !== null) {
                    if (input.charCodeAt(pos) === 58) {
                      result4 = ":";
                      pos++;
                    } else {
                      result4 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\":\"");
                      }
                    }
  
                    if (result4 !== null) {
                      result5 = parse_h16();
  
                      if (result5 !== null) {
                        if (input.charCodeAt(pos) === 58) {
                          result6 = ":";
                          pos++;
                        } else {
                          result6 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\":\"");
                          }
                        }
  
                        if (result6 !== null) {
                          result7 = parse_h16();
  
                          if (result7 !== null) {
                            if (input.charCodeAt(pos) === 58) {
                              result8 = ":";
                              pos++;
                            } else {
                              result8 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\":\"");
                              }
                            }
  
                            if (result8 !== null) {
                              result9 = parse_h16();
  
                              if (result9 !== null) {
                                if (input.charCodeAt(pos) === 58) {
                                  result10 = ":";
                                  pos++;
                                } else {
                                  result10 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\":\"");
                                  }
                                }
  
                                if (result10 !== null) {
                                  result11 = parse_ls32();
  
                                  if (result11 !== null) {
                                    result0 = [result0, result1, result2, result3, result4, result5, result6, result7, result8, result9, result10, result11];
                                  } else {
                                    result0 = null;
                                    pos = pos1;
                                  }
                                } else {
                                  result0 = null;
                                  pos = pos1;
                                }
                              } else {
                                result0 = null;
                                pos = pos1;
                              }
                            } else {
                              result0 = null;
                              pos = pos1;
                            }
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
  
            if (result0 === null) {
              pos1 = pos;
  
              if (input.substr(pos, 2) === "::") {
                result0 = "::";
                pos += 2;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"::\"");
                }
              }
  
              if (result0 !== null) {
                result1 = parse_h16();
  
                if (result1 !== null) {
                  if (input.charCodeAt(pos) === 58) {
                    result2 = ":";
                    pos++;
                  } else {
                    result2 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\":\"");
                    }
                  }
  
                  if (result2 !== null) {
                    result3 = parse_h16();
  
                    if (result3 !== null) {
                      if (input.charCodeAt(pos) === 58) {
                        result4 = ":";
                        pos++;
                      } else {
                        result4 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\":\"");
                        }
                      }
  
                      if (result4 !== null) {
                        result5 = parse_h16();
  
                        if (result5 !== null) {
                          if (input.charCodeAt(pos) === 58) {
                            result6 = ":";
                            pos++;
                          } else {
                            result6 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\":\"");
                            }
                          }
  
                          if (result6 !== null) {
                            result7 = parse_h16();
  
                            if (result7 !== null) {
                              if (input.charCodeAt(pos) === 58) {
                                result8 = ":";
                                pos++;
                              } else {
                                result8 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\":\"");
                                }
                              }
  
                              if (result8 !== null) {
                                result9 = parse_ls32();
  
                                if (result9 !== null) {
                                  result0 = [result0, result1, result2, result3, result4, result5, result6, result7, result8, result9];
                                } else {
                                  result0 = null;
                                  pos = pos1;
                                }
                              } else {
                                result0 = null;
                                pos = pos1;
                              }
                            } else {
                              result0 = null;
                              pos = pos1;
                            }
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
  
              if (result0 === null) {
                pos1 = pos;
  
                if (input.substr(pos, 2) === "::") {
                  result0 = "::";
                  pos += 2;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"::\"");
                  }
                }
  
                if (result0 !== null) {
                  result1 = parse_h16();
  
                  if (result1 !== null) {
                    if (input.charCodeAt(pos) === 58) {
                      result2 = ":";
                      pos++;
                    } else {
                      result2 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\":\"");
                      }
                    }
  
                    if (result2 !== null) {
                      result3 = parse_h16();
  
                      if (result3 !== null) {
                        if (input.charCodeAt(pos) === 58) {
                          result4 = ":";
                          pos++;
                        } else {
                          result4 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\":\"");
                          }
                        }
  
                        if (result4 !== null) {
                          result5 = parse_h16();
  
                          if (result5 !== null) {
                            if (input.charCodeAt(pos) === 58) {
                              result6 = ":";
                              pos++;
                            } else {
                              result6 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\":\"");
                              }
                            }
  
                            if (result6 !== null) {
                              result7 = parse_ls32();
  
                              if (result7 !== null) {
                                result0 = [result0, result1, result2, result3, result4, result5, result6, result7];
                              } else {
                                result0 = null;
                                pos = pos1;
                              }
                            } else {
                              result0 = null;
                              pos = pos1;
                            }
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
  
                if (result0 === null) {
                  pos1 = pos;
  
                  if (input.substr(pos, 2) === "::") {
                    result0 = "::";
                    pos += 2;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"::\"");
                    }
                  }
  
                  if (result0 !== null) {
                    result1 = parse_h16();
  
                    if (result1 !== null) {
                      if (input.charCodeAt(pos) === 58) {
                        result2 = ":";
                        pos++;
                      } else {
                        result2 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\":\"");
                        }
                      }
  
                      if (result2 !== null) {
                        result3 = parse_h16();
  
                        if (result3 !== null) {
                          if (input.charCodeAt(pos) === 58) {
                            result4 = ":";
                            pos++;
                          } else {
                            result4 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\":\"");
                            }
                          }
  
                          if (result4 !== null) {
                            result5 = parse_ls32();
  
                            if (result5 !== null) {
                              result0 = [result0, result1, result2, result3, result4, result5];
                            } else {
                              result0 = null;
                              pos = pos1;
                            }
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
  
                  if (result0 === null) {
                    pos1 = pos;
  
                    if (input.substr(pos, 2) === "::") {
                      result0 = "::";
                      pos += 2;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"::\"");
                      }
                    }
  
                    if (result0 !== null) {
                      result1 = parse_h16();
  
                      if (result1 !== null) {
                        if (input.charCodeAt(pos) === 58) {
                          result2 = ":";
                          pos++;
                        } else {
                          result2 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\":\"");
                          }
                        }
  
                        if (result2 !== null) {
                          result3 = parse_ls32();
  
                          if (result3 !== null) {
                            result0 = [result0, result1, result2, result3];
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
  
                    if (result0 === null) {
                      pos1 = pos;
  
                      if (input.substr(pos, 2) === "::") {
                        result0 = "::";
                        pos += 2;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"::\"");
                        }
                      }
  
                      if (result0 !== null) {
                        result1 = parse_ls32();
  
                        if (result1 !== null) {
                          result0 = [result0, result1];
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
  
                      if (result0 === null) {
                        pos1 = pos;
  
                        if (input.substr(pos, 2) === "::") {
                          result0 = "::";
                          pos += 2;
                        } else {
                          result0 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"::\"");
                          }
                        }
  
                        if (result0 !== null) {
                          result1 = parse_h16();
  
                          if (result1 !== null) {
                            result0 = [result0, result1];
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
  
                        if (result0 === null) {
                          pos1 = pos;
                          result0 = parse_h16();
  
                          if (result0 !== null) {
                            if (input.substr(pos, 2) === "::") {
                              result1 = "::";
                              pos += 2;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"::\"");
                              }
                            }
  
                            if (result1 !== null) {
                              result2 = parse_h16();
  
                              if (result2 !== null) {
                                if (input.charCodeAt(pos) === 58) {
                                  result3 = ":";
                                  pos++;
                                } else {
                                  result3 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\":\"");
                                  }
                                }
  
                                if (result3 !== null) {
                                  result4 = parse_h16();
  
                                  if (result4 !== null) {
                                    if (input.charCodeAt(pos) === 58) {
                                      result5 = ":";
                                      pos++;
                                    } else {
                                      result5 = null;
  
                                      if (reportFailures === 0) {
                                        matchFailed("\":\"");
                                      }
                                    }
  
                                    if (result5 !== null) {
                                      result6 = parse_h16();
  
                                      if (result6 !== null) {
                                        if (input.charCodeAt(pos) === 58) {
                                          result7 = ":";
                                          pos++;
                                        } else {
                                          result7 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\":\"");
                                          }
                                        }
  
                                        if (result7 !== null) {
                                          result8 = parse_h16();
  
                                          if (result8 !== null) {
                                            if (input.charCodeAt(pos) === 58) {
                                              result9 = ":";
                                              pos++;
                                            } else {
                                              result9 = null;
  
                                              if (reportFailures === 0) {
                                                matchFailed("\":\"");
                                              }
                                            }
  
                                            if (result9 !== null) {
                                              result10 = parse_ls32();
  
                                              if (result10 !== null) {
                                                result0 = [result0, result1, result2, result3, result4, result5, result6, result7, result8, result9, result10];
                                              } else {
                                                result0 = null;
                                                pos = pos1;
                                              }
                                            } else {
                                              result0 = null;
                                              pos = pos1;
                                            }
                                          } else {
                                            result0 = null;
                                            pos = pos1;
                                          }
                                        } else {
                                          result0 = null;
                                          pos = pos1;
                                        }
                                      } else {
                                        result0 = null;
                                        pos = pos1;
                                      }
                                    } else {
                                      result0 = null;
                                      pos = pos1;
                                    }
                                  } else {
                                    result0 = null;
                                    pos = pos1;
                                  }
                                } else {
                                  result0 = null;
                                  pos = pos1;
                                }
                              } else {
                                result0 = null;
                                pos = pos1;
                              }
                            } else {
                              result0 = null;
                              pos = pos1;
                            }
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
  
                          if (result0 === null) {
                            pos1 = pos;
                            result0 = parse_h16();
  
                            if (result0 !== null) {
                              pos2 = pos;
  
                              if (input.charCodeAt(pos) === 58) {
                                result1 = ":";
                                pos++;
                              } else {
                                result1 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\":\"");
                                }
                              }
  
                              if (result1 !== null) {
                                result2 = parse_h16();
  
                                if (result2 !== null) {
                                  result1 = [result1, result2];
                                } else {
                                  result1 = null;
                                  pos = pos2;
                                }
                              } else {
                                result1 = null;
                                pos = pos2;
                              }
  
                              result1 = result1 !== null ? result1 : "";
  
                              if (result1 !== null) {
                                if (input.substr(pos, 2) === "::") {
                                  result2 = "::";
                                  pos += 2;
                                } else {
                                  result2 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\"::\"");
                                  }
                                }
  
                                if (result2 !== null) {
                                  result3 = parse_h16();
  
                                  if (result3 !== null) {
                                    if (input.charCodeAt(pos) === 58) {
                                      result4 = ":";
                                      pos++;
                                    } else {
                                      result4 = null;
  
                                      if (reportFailures === 0) {
                                        matchFailed("\":\"");
                                      }
                                    }
  
                                    if (result4 !== null) {
                                      result5 = parse_h16();
  
                                      if (result5 !== null) {
                                        if (input.charCodeAt(pos) === 58) {
                                          result6 = ":";
                                          pos++;
                                        } else {
                                          result6 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\":\"");
                                          }
                                        }
  
                                        if (result6 !== null) {
                                          result7 = parse_h16();
  
                                          if (result7 !== null) {
                                            if (input.charCodeAt(pos) === 58) {
                                              result8 = ":";
                                              pos++;
                                            } else {
                                              result8 = null;
  
                                              if (reportFailures === 0) {
                                                matchFailed("\":\"");
                                              }
                                            }
  
                                            if (result8 !== null) {
                                              result9 = parse_ls32();
  
                                              if (result9 !== null) {
                                                result0 = [result0, result1, result2, result3, result4, result5, result6, result7, result8, result9];
                                              } else {
                                                result0 = null;
                                                pos = pos1;
                                              }
                                            } else {
                                              result0 = null;
                                              pos = pos1;
                                            }
                                          } else {
                                            result0 = null;
                                            pos = pos1;
                                          }
                                        } else {
                                          result0 = null;
                                          pos = pos1;
                                        }
                                      } else {
                                        result0 = null;
                                        pos = pos1;
                                      }
                                    } else {
                                      result0 = null;
                                      pos = pos1;
                                    }
                                  } else {
                                    result0 = null;
                                    pos = pos1;
                                  }
                                } else {
                                  result0 = null;
                                  pos = pos1;
                                }
                              } else {
                                result0 = null;
                                pos = pos1;
                              }
                            } else {
                              result0 = null;
                              pos = pos1;
                            }
  
                            if (result0 === null) {
                              pos1 = pos;
                              result0 = parse_h16();
  
                              if (result0 !== null) {
                                pos2 = pos;
  
                                if (input.charCodeAt(pos) === 58) {
                                  result1 = ":";
                                  pos++;
                                } else {
                                  result1 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\":\"");
                                  }
                                }
  
                                if (result1 !== null) {
                                  result2 = parse_h16();
  
                                  if (result2 !== null) {
                                    result1 = [result1, result2];
                                  } else {
                                    result1 = null;
                                    pos = pos2;
                                  }
                                } else {
                                  result1 = null;
                                  pos = pos2;
                                }
  
                                result1 = result1 !== null ? result1 : "";
  
                                if (result1 !== null) {
                                  pos2 = pos;
  
                                  if (input.charCodeAt(pos) === 58) {
                                    result2 = ":";
                                    pos++;
                                  } else {
                                    result2 = null;
  
                                    if (reportFailures === 0) {
                                      matchFailed("\":\"");
                                    }
                                  }
  
                                  if (result2 !== null) {
                                    result3 = parse_h16();
  
                                    if (result3 !== null) {
                                      result2 = [result2, result3];
                                    } else {
                                      result2 = null;
                                      pos = pos2;
                                    }
                                  } else {
                                    result2 = null;
                                    pos = pos2;
                                  }
  
                                  result2 = result2 !== null ? result2 : "";
  
                                  if (result2 !== null) {
                                    if (input.substr(pos, 2) === "::") {
                                      result3 = "::";
                                      pos += 2;
                                    } else {
                                      result3 = null;
  
                                      if (reportFailures === 0) {
                                        matchFailed("\"::\"");
                                      }
                                    }
  
                                    if (result3 !== null) {
                                      result4 = parse_h16();
  
                                      if (result4 !== null) {
                                        if (input.charCodeAt(pos) === 58) {
                                          result5 = ":";
                                          pos++;
                                        } else {
                                          result5 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\":\"");
                                          }
                                        }
  
                                        if (result5 !== null) {
                                          result6 = parse_h16();
  
                                          if (result6 !== null) {
                                            if (input.charCodeAt(pos) === 58) {
                                              result7 = ":";
                                              pos++;
                                            } else {
                                              result7 = null;
  
                                              if (reportFailures === 0) {
                                                matchFailed("\":\"");
                                              }
                                            }
  
                                            if (result7 !== null) {
                                              result8 = parse_ls32();
  
                                              if (result8 !== null) {
                                                result0 = [result0, result1, result2, result3, result4, result5, result6, result7, result8];
                                              } else {
                                                result0 = null;
                                                pos = pos1;
                                              }
                                            } else {
                                              result0 = null;
                                              pos = pos1;
                                            }
                                          } else {
                                            result0 = null;
                                            pos = pos1;
                                          }
                                        } else {
                                          result0 = null;
                                          pos = pos1;
                                        }
                                      } else {
                                        result0 = null;
                                        pos = pos1;
                                      }
                                    } else {
                                      result0 = null;
                                      pos = pos1;
                                    }
                                  } else {
                                    result0 = null;
                                    pos = pos1;
                                  }
                                } else {
                                  result0 = null;
                                  pos = pos1;
                                }
                              } else {
                                result0 = null;
                                pos = pos1;
                              }
  
                              if (result0 === null) {
                                pos1 = pos;
                                result0 = parse_h16();
  
                                if (result0 !== null) {
                                  pos2 = pos;
  
                                  if (input.charCodeAt(pos) === 58) {
                                    result1 = ":";
                                    pos++;
                                  } else {
                                    result1 = null;
  
                                    if (reportFailures === 0) {
                                      matchFailed("\":\"");
                                    }
                                  }
  
                                  if (result1 !== null) {
                                    result2 = parse_h16();
  
                                    if (result2 !== null) {
                                      result1 = [result1, result2];
                                    } else {
                                      result1 = null;
                                      pos = pos2;
                                    }
                                  } else {
                                    result1 = null;
                                    pos = pos2;
                                  }
  
                                  result1 = result1 !== null ? result1 : "";
  
                                  if (result1 !== null) {
                                    pos2 = pos;
  
                                    if (input.charCodeAt(pos) === 58) {
                                      result2 = ":";
                                      pos++;
                                    } else {
                                      result2 = null;
  
                                      if (reportFailures === 0) {
                                        matchFailed("\":\"");
                                      }
                                    }
  
                                    if (result2 !== null) {
                                      result3 = parse_h16();
  
                                      if (result3 !== null) {
                                        result2 = [result2, result3];
                                      } else {
                                        result2 = null;
                                        pos = pos2;
                                      }
                                    } else {
                                      result2 = null;
                                      pos = pos2;
                                    }
  
                                    result2 = result2 !== null ? result2 : "";
  
                                    if (result2 !== null) {
                                      pos2 = pos;
  
                                      if (input.charCodeAt(pos) === 58) {
                                        result3 = ":";
                                        pos++;
                                      } else {
                                        result3 = null;
  
                                        if (reportFailures === 0) {
                                          matchFailed("\":\"");
                                        }
                                      }
  
                                      if (result3 !== null) {
                                        result4 = parse_h16();
  
                                        if (result4 !== null) {
                                          result3 = [result3, result4];
                                        } else {
                                          result3 = null;
                                          pos = pos2;
                                        }
                                      } else {
                                        result3 = null;
                                        pos = pos2;
                                      }
  
                                      result3 = result3 !== null ? result3 : "";
  
                                      if (result3 !== null) {
                                        if (input.substr(pos, 2) === "::") {
                                          result4 = "::";
                                          pos += 2;
                                        } else {
                                          result4 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\"::\"");
                                          }
                                        }
  
                                        if (result4 !== null) {
                                          result5 = parse_h16();
  
                                          if (result5 !== null) {
                                            if (input.charCodeAt(pos) === 58) {
                                              result6 = ":";
                                              pos++;
                                            } else {
                                              result6 = null;
  
                                              if (reportFailures === 0) {
                                                matchFailed("\":\"");
                                              }
                                            }
  
                                            if (result6 !== null) {
                                              result7 = parse_ls32();
  
                                              if (result7 !== null) {
                                                result0 = [result0, result1, result2, result3, result4, result5, result6, result7];
                                              } else {
                                                result0 = null;
                                                pos = pos1;
                                              }
                                            } else {
                                              result0 = null;
                                              pos = pos1;
                                            }
                                          } else {
                                            result0 = null;
                                            pos = pos1;
                                          }
                                        } else {
                                          result0 = null;
                                          pos = pos1;
                                        }
                                      } else {
                                        result0 = null;
                                        pos = pos1;
                                      }
                                    } else {
                                      result0 = null;
                                      pos = pos1;
                                    }
                                  } else {
                                    result0 = null;
                                    pos = pos1;
                                  }
                                } else {
                                  result0 = null;
                                  pos = pos1;
                                }
  
                                if (result0 === null) {
                                  pos1 = pos;
                                  result0 = parse_h16();
  
                                  if (result0 !== null) {
                                    pos2 = pos;
  
                                    if (input.charCodeAt(pos) === 58) {
                                      result1 = ":";
                                      pos++;
                                    } else {
                                      result1 = null;
  
                                      if (reportFailures === 0) {
                                        matchFailed("\":\"");
                                      }
                                    }
  
                                    if (result1 !== null) {
                                      result2 = parse_h16();
  
                                      if (result2 !== null) {
                                        result1 = [result1, result2];
                                      } else {
                                        result1 = null;
                                        pos = pos2;
                                      }
                                    } else {
                                      result1 = null;
                                      pos = pos2;
                                    }
  
                                    result1 = result1 !== null ? result1 : "";
  
                                    if (result1 !== null) {
                                      pos2 = pos;
  
                                      if (input.charCodeAt(pos) === 58) {
                                        result2 = ":";
                                        pos++;
                                      } else {
                                        result2 = null;
  
                                        if (reportFailures === 0) {
                                          matchFailed("\":\"");
                                        }
                                      }
  
                                      if (result2 !== null) {
                                        result3 = parse_h16();
  
                                        if (result3 !== null) {
                                          result2 = [result2, result3];
                                        } else {
                                          result2 = null;
                                          pos = pos2;
                                        }
                                      } else {
                                        result2 = null;
                                        pos = pos2;
                                      }
  
                                      result2 = result2 !== null ? result2 : "";
  
                                      if (result2 !== null) {
                                        pos2 = pos;
  
                                        if (input.charCodeAt(pos) === 58) {
                                          result3 = ":";
                                          pos++;
                                        } else {
                                          result3 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\":\"");
                                          }
                                        }
  
                                        if (result3 !== null) {
                                          result4 = parse_h16();
  
                                          if (result4 !== null) {
                                            result3 = [result3, result4];
                                          } else {
                                            result3 = null;
                                            pos = pos2;
                                          }
                                        } else {
                                          result3 = null;
                                          pos = pos2;
                                        }
  
                                        result3 = result3 !== null ? result3 : "";
  
                                        if (result3 !== null) {
                                          pos2 = pos;
  
                                          if (input.charCodeAt(pos) === 58) {
                                            result4 = ":";
                                            pos++;
                                          } else {
                                            result4 = null;
  
                                            if (reportFailures === 0) {
                                              matchFailed("\":\"");
                                            }
                                          }
  
                                          if (result4 !== null) {
                                            result5 = parse_h16();
  
                                            if (result5 !== null) {
                                              result4 = [result4, result5];
                                            } else {
                                              result4 = null;
                                              pos = pos2;
                                            }
                                          } else {
                                            result4 = null;
                                            pos = pos2;
                                          }
  
                                          result4 = result4 !== null ? result4 : "";
  
                                          if (result4 !== null) {
                                            if (input.substr(pos, 2) === "::") {
                                              result5 = "::";
                                              pos += 2;
                                            } else {
                                              result5 = null;
  
                                              if (reportFailures === 0) {
                                                matchFailed("\"::\"");
                                              }
                                            }
  
                                            if (result5 !== null) {
                                              result6 = parse_ls32();
  
                                              if (result6 !== null) {
                                                result0 = [result0, result1, result2, result3, result4, result5, result6];
                                              } else {
                                                result0 = null;
                                                pos = pos1;
                                              }
                                            } else {
                                              result0 = null;
                                              pos = pos1;
                                            }
                                          } else {
                                            result0 = null;
                                            pos = pos1;
                                          }
                                        } else {
                                          result0 = null;
                                          pos = pos1;
                                        }
                                      } else {
                                        result0 = null;
                                        pos = pos1;
                                      }
                                    } else {
                                      result0 = null;
                                      pos = pos1;
                                    }
                                  } else {
                                    result0 = null;
                                    pos = pos1;
                                  }
  
                                  if (result0 === null) {
                                    pos1 = pos;
                                    result0 = parse_h16();
  
                                    if (result0 !== null) {
                                      pos2 = pos;
  
                                      if (input.charCodeAt(pos) === 58) {
                                        result1 = ":";
                                        pos++;
                                      } else {
                                        result1 = null;
  
                                        if (reportFailures === 0) {
                                          matchFailed("\":\"");
                                        }
                                      }
  
                                      if (result1 !== null) {
                                        result2 = parse_h16();
  
                                        if (result2 !== null) {
                                          result1 = [result1, result2];
                                        } else {
                                          result1 = null;
                                          pos = pos2;
                                        }
                                      } else {
                                        result1 = null;
                                        pos = pos2;
                                      }
  
                                      result1 = result1 !== null ? result1 : "";
  
                                      if (result1 !== null) {
                                        pos2 = pos;
  
                                        if (input.charCodeAt(pos) === 58) {
                                          result2 = ":";
                                          pos++;
                                        } else {
                                          result2 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\":\"");
                                          }
                                        }
  
                                        if (result2 !== null) {
                                          result3 = parse_h16();
  
                                          if (result3 !== null) {
                                            result2 = [result2, result3];
                                          } else {
                                            result2 = null;
                                            pos = pos2;
                                          }
                                        } else {
                                          result2 = null;
                                          pos = pos2;
                                        }
  
                                        result2 = result2 !== null ? result2 : "";
  
                                        if (result2 !== null) {
                                          pos2 = pos;
  
                                          if (input.charCodeAt(pos) === 58) {
                                            result3 = ":";
                                            pos++;
                                          } else {
                                            result3 = null;
  
                                            if (reportFailures === 0) {
                                              matchFailed("\":\"");
                                            }
                                          }
  
                                          if (result3 !== null) {
                                            result4 = parse_h16();
  
                                            if (result4 !== null) {
                                              result3 = [result3, result4];
                                            } else {
                                              result3 = null;
                                              pos = pos2;
                                            }
                                          } else {
                                            result3 = null;
                                            pos = pos2;
                                          }
  
                                          result3 = result3 !== null ? result3 : "";
  
                                          if (result3 !== null) {
                                            pos2 = pos;
  
                                            if (input.charCodeAt(pos) === 58) {
                                              result4 = ":";
                                              pos++;
                                            } else {
                                              result4 = null;
  
                                              if (reportFailures === 0) {
                                                matchFailed("\":\"");
                                              }
                                            }
  
                                            if (result4 !== null) {
                                              result5 = parse_h16();
  
                                              if (result5 !== null) {
                                                result4 = [result4, result5];
                                              } else {
                                                result4 = null;
                                                pos = pos2;
                                              }
                                            } else {
                                              result4 = null;
                                              pos = pos2;
                                            }
  
                                            result4 = result4 !== null ? result4 : "";
  
                                            if (result4 !== null) {
                                              pos2 = pos;
  
                                              if (input.charCodeAt(pos) === 58) {
                                                result5 = ":";
                                                pos++;
                                              } else {
                                                result5 = null;
  
                                                if (reportFailures === 0) {
                                                  matchFailed("\":\"");
                                                }
                                              }
  
                                              if (result5 !== null) {
                                                result6 = parse_h16();
  
                                                if (result6 !== null) {
                                                  result5 = [result5, result6];
                                                } else {
                                                  result5 = null;
                                                  pos = pos2;
                                                }
                                              } else {
                                                result5 = null;
                                                pos = pos2;
                                              }
  
                                              result5 = result5 !== null ? result5 : "";
  
                                              if (result5 !== null) {
                                                if (input.substr(pos, 2) === "::") {
                                                  result6 = "::";
                                                  pos += 2;
                                                } else {
                                                  result6 = null;
  
                                                  if (reportFailures === 0) {
                                                    matchFailed("\"::\"");
                                                  }
                                                }
  
                                                if (result6 !== null) {
                                                  result7 = parse_h16();
  
                                                  if (result7 !== null) {
                                                    result0 = [result0, result1, result2, result3, result4, result5, result6, result7];
                                                  } else {
                                                    result0 = null;
                                                    pos = pos1;
                                                  }
                                                } else {
                                                  result0 = null;
                                                  pos = pos1;
                                                }
                                              } else {
                                                result0 = null;
                                                pos = pos1;
                                              }
                                            } else {
                                              result0 = null;
                                              pos = pos1;
                                            }
                                          } else {
                                            result0 = null;
                                            pos = pos1;
                                          }
                                        } else {
                                          result0 = null;
                                          pos = pos1;
                                        }
                                      } else {
                                        result0 = null;
                                        pos = pos1;
                                      }
                                    } else {
                                      result0 = null;
                                      pos = pos1;
                                    }
  
                                    if (result0 === null) {
                                      pos1 = pos;
                                      result0 = parse_h16();
  
                                      if (result0 !== null) {
                                        pos2 = pos;
  
                                        if (input.charCodeAt(pos) === 58) {
                                          result1 = ":";
                                          pos++;
                                        } else {
                                          result1 = null;
  
                                          if (reportFailures === 0) {
                                            matchFailed("\":\"");
                                          }
                                        }
  
                                        if (result1 !== null) {
                                          result2 = parse_h16();
  
                                          if (result2 !== null) {
                                            result1 = [result1, result2];
                                          } else {
                                            result1 = null;
                                            pos = pos2;
                                          }
                                        } else {
                                          result1 = null;
                                          pos = pos2;
                                        }
  
                                        result1 = result1 !== null ? result1 : "";
  
                                        if (result1 !== null) {
                                          pos2 = pos;
  
                                          if (input.charCodeAt(pos) === 58) {
                                            result2 = ":";
                                            pos++;
                                          } else {
                                            result2 = null;
  
                                            if (reportFailures === 0) {
                                              matchFailed("\":\"");
                                            }
                                          }
  
                                          if (result2 !== null) {
                                            result3 = parse_h16();
  
                                            if (result3 !== null) {
                                              result2 = [result2, result3];
                                            } else {
                                              result2 = null;
                                              pos = pos2;
                                            }
                                          } else {
                                            result2 = null;
                                            pos = pos2;
                                          }
  
                                          result2 = result2 !== null ? result2 : "";
  
                                          if (result2 !== null) {
                                            pos2 = pos;
  
                                            if (input.charCodeAt(pos) === 58) {
                                              result3 = ":";
                                              pos++;
                                            } else {
                                              result3 = null;
  
                                              if (reportFailures === 0) {
                                                matchFailed("\":\"");
                                              }
                                            }
  
                                            if (result3 !== null) {
                                              result4 = parse_h16();
  
                                              if (result4 !== null) {
                                                result3 = [result3, result4];
                                              } else {
                                                result3 = null;
                                                pos = pos2;
                                              }
                                            } else {
                                              result3 = null;
                                              pos = pos2;
                                            }
  
                                            result3 = result3 !== null ? result3 : "";
  
                                            if (result3 !== null) {
                                              pos2 = pos;
  
                                              if (input.charCodeAt(pos) === 58) {
                                                result4 = ":";
                                                pos++;
                                              } else {
                                                result4 = null;
  
                                                if (reportFailures === 0) {
                                                  matchFailed("\":\"");
                                                }
                                              }
  
                                              if (result4 !== null) {
                                                result5 = parse_h16();
  
                                                if (result5 !== null) {
                                                  result4 = [result4, result5];
                                                } else {
                                                  result4 = null;
                                                  pos = pos2;
                                                }
                                              } else {
                                                result4 = null;
                                                pos = pos2;
                                              }
  
                                              result4 = result4 !== null ? result4 : "";
  
                                              if (result4 !== null) {
                                                pos2 = pos;
  
                                                if (input.charCodeAt(pos) === 58) {
                                                  result5 = ":";
                                                  pos++;
                                                } else {
                                                  result5 = null;
  
                                                  if (reportFailures === 0) {
                                                    matchFailed("\":\"");
                                                  }
                                                }
  
                                                if (result5 !== null) {
                                                  result6 = parse_h16();
  
                                                  if (result6 !== null) {
                                                    result5 = [result5, result6];
                                                  } else {
                                                    result5 = null;
                                                    pos = pos2;
                                                  }
                                                } else {
                                                  result5 = null;
                                                  pos = pos2;
                                                }
  
                                                result5 = result5 !== null ? result5 : "";
  
                                                if (result5 !== null) {
                                                  pos2 = pos;
  
                                                  if (input.charCodeAt(pos) === 58) {
                                                    result6 = ":";
                                                    pos++;
                                                  } else {
                                                    result6 = null;
  
                                                    if (reportFailures === 0) {
                                                      matchFailed("\":\"");
                                                    }
                                                  }
  
                                                  if (result6 !== null) {
                                                    result7 = parse_h16();
  
                                                    if (result7 !== null) {
                                                      result6 = [result6, result7];
                                                    } else {
                                                      result6 = null;
                                                      pos = pos2;
                                                    }
                                                  } else {
                                                    result6 = null;
                                                    pos = pos2;
                                                  }
  
                                                  result6 = result6 !== null ? result6 : "";
  
                                                  if (result6 !== null) {
                                                    if (input.substr(pos, 2) === "::") {
                                                      result7 = "::";
                                                      pos += 2;
                                                    } else {
                                                      result7 = null;
  
                                                      if (reportFailures === 0) {
                                                        matchFailed("\"::\"");
                                                      }
                                                    }
  
                                                    if (result7 !== null) {
                                                      result0 = [result0, result1, result2, result3, result4, result5, result6, result7];
                                                    } else {
                                                      result0 = null;
                                                      pos = pos1;
                                                    }
                                                  } else {
                                                    result0 = null;
                                                    pos = pos1;
                                                  }
                                                } else {
                                                  result0 = null;
                                                  pos = pos1;
                                                }
                                              } else {
                                                result0 = null;
                                                pos = pos1;
                                              }
                                            } else {
                                              result0 = null;
                                              pos = pos1;
                                            }
                                          } else {
                                            result0 = null;
                                            pos = pos1;
                                          }
                                        } else {
                                          result0 = null;
                                          pos = pos1;
                                        }
                                      } else {
                                        result0 = null;
                                        pos = pos1;
                                      }
                                    }
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.host_type = 'IPv6';
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_h16() {
          var result0, result1, result2, result3;
          var pos0;
          pos0 = pos;
          result0 = parse_HEXDIG();
  
          if (result0 !== null) {
            result1 = parse_HEXDIG();
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result2 = parse_HEXDIG();
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result3 = parse_HEXDIG();
                result3 = result3 !== null ? result3 : "";
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_ls32() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_h16();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_h16();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          if (result0 === null) {
            result0 = parse_IPv4address();
          }
  
          return result0;
        }
  
        function parse_IPv4address() {
          var result0, result1, result2, result3, result4, result5, result6;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_dec_octet();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 46) {
              result1 = ".";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\".\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_dec_octet();
  
              if (result2 !== null) {
                if (input.charCodeAt(pos) === 46) {
                  result3 = ".";
                  pos++;
                } else {
                  result3 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\".\"");
                  }
                }
  
                if (result3 !== null) {
                  result4 = parse_dec_octet();
  
                  if (result4 !== null) {
                    if (input.charCodeAt(pos) === 46) {
                      result5 = ".";
                      pos++;
                    } else {
                      result5 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\".\"");
                      }
                    }
  
                    if (result5 !== null) {
                      result6 = parse_dec_octet();
  
                      if (result6 !== null) {
                        result0 = [result0, result1, result2, result3, result4, result5, result6];
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.host_type = 'IPv4';
              return input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_dec_octet() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 2) === "25") {
            result0 = "25";
            pos += 2;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"25\"");
            }
          }
  
          if (result0 !== null) {
            if (/^[0-5]/.test(input.charAt(pos))) {
              result1 = input.charAt(pos);
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("[0-5]");
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          if (result0 === null) {
            pos0 = pos;
  
            if (input.charCodeAt(pos) === 50) {
              result0 = "2";
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"2\"");
              }
            }
  
            if (result0 !== null) {
              if (/^[0-4]/.test(input.charAt(pos))) {
                result1 = input.charAt(pos);
                pos++;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("[0-4]");
                }
              }
  
              if (result1 !== null) {
                result2 = parse_DIGIT();
  
                if (result2 !== null) {
                  result0 = [result0, result1, result2];
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
  
            if (result0 === null) {
              pos0 = pos;
  
              if (input.charCodeAt(pos) === 49) {
                result0 = "1";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"1\"");
                }
              }
  
              if (result0 !== null) {
                result1 = parse_DIGIT();
  
                if (result1 !== null) {
                  result2 = parse_DIGIT();
  
                  if (result2 !== null) {
                    result0 = [result0, result1, result2];
                  } else {
                    result0 = null;
                    pos = pos0;
                  }
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
  
              if (result0 === null) {
                pos0 = pos;
  
                if (/^[1-9]/.test(input.charAt(pos))) {
                  result0 = input.charAt(pos);
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("[1-9]");
                  }
                }
  
                if (result0 !== null) {
                  result1 = parse_DIGIT();
  
                  if (result1 !== null) {
                    result0 = [result0, result1];
                  } else {
                    result0 = null;
                    pos = pos0;
                  }
                } else {
                  result0 = null;
                  pos = pos0;
                }
  
                if (result0 === null) {
                  result0 = parse_DIGIT();
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_port() {
          var result0, result1, result2, result3, result4;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_DIGIT();
          result0 = result0 !== null ? result0 : "";
  
          if (result0 !== null) {
            result1 = parse_DIGIT();
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result2 = parse_DIGIT();
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result3 = parse_DIGIT();
                result3 = result3 !== null ? result3 : "";
  
                if (result3 !== null) {
                  result4 = parse_DIGIT();
                  result4 = result4 !== null ? result4 : "";
  
                  if (result4 !== null) {
                    result0 = [result0, result1, result2, result3, result4];
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, port) {
              port = parseInt(port.join(''));
              data.port = port;
              return port;
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_uri_parameters() {
          var result0, result1, result2;
          var pos0;
          result0 = [];
          pos0 = pos;
  
          if (input.charCodeAt(pos) === 59) {
            result1 = ";";
            pos++;
          } else {
            result1 = null;
  
            if (reportFailures === 0) {
              matchFailed("\";\"");
            }
          }
  
          if (result1 !== null) {
            result2 = parse_uri_parameter();
  
            if (result2 !== null) {
              result1 = [result1, result2];
            } else {
              result1 = null;
              pos = pos0;
            }
          } else {
            result1 = null;
            pos = pos0;
          }
  
          while (result1 !== null) {
            result0.push(result1);
            pos0 = pos;
  
            if (input.charCodeAt(pos) === 59) {
              result1 = ";";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\";\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_uri_parameter();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos0;
              }
            } else {
              result1 = null;
              pos = pos0;
            }
          }
  
          return result0;
        }
  
        function parse_uri_parameter() {
          var result0;
          result0 = parse_transport_param();
  
          if (result0 === null) {
            result0 = parse_user_param();
  
            if (result0 === null) {
              result0 = parse_method_param();
  
              if (result0 === null) {
                result0 = parse_ttl_param();
  
                if (result0 === null) {
                  result0 = parse_maddr_param();
  
                  if (result0 === null) {
                    result0 = parse_lr_param();
  
                    if (result0 === null) {
                      result0 = parse_other_param();
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_transport_param() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 10).toLowerCase() === "transport=") {
            result0 = input.substr(pos, 10);
            pos += 10;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"transport=\"");
            }
          }
  
          if (result0 !== null) {
            if (input.substr(pos, 3).toLowerCase() === "udp") {
              result1 = input.substr(pos, 3);
              pos += 3;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"udp\"");
              }
            }
  
            if (result1 === null) {
              if (input.substr(pos, 3).toLowerCase() === "tcp") {
                result1 = input.substr(pos, 3);
                pos += 3;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"tcp\"");
                }
              }
  
              if (result1 === null) {
                if (input.substr(pos, 4).toLowerCase() === "sctp") {
                  result1 = input.substr(pos, 4);
                  pos += 4;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"sctp\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.substr(pos, 3).toLowerCase() === "tls") {
                    result1 = input.substr(pos, 3);
                    pos += 3;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"tls\"");
                    }
                  }
  
                  if (result1 === null) {
                    result1 = parse_token();
                  }
                }
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, transport) {
              if (!data.uri_params) data.uri_params = {};
              data.uri_params['transport'] = transport.toLowerCase();
            }(pos0, result0[1]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_user_param() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 5).toLowerCase() === "user=") {
            result0 = input.substr(pos, 5);
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"user=\"");
            }
          }
  
          if (result0 !== null) {
            if (input.substr(pos, 5).toLowerCase() === "phone") {
              result1 = input.substr(pos, 5);
              pos += 5;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"phone\"");
              }
            }
  
            if (result1 === null) {
              if (input.substr(pos, 2).toLowerCase() === "ip") {
                result1 = input.substr(pos, 2);
                pos += 2;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"ip\"");
                }
              }
  
              if (result1 === null) {
                result1 = parse_token();
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, user) {
              if (!data.uri_params) data.uri_params = {};
              data.uri_params['user'] = user.toLowerCase();
            }(pos0, result0[1]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_method_param() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 7).toLowerCase() === "method=") {
            result0 = input.substr(pos, 7);
            pos += 7;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"method=\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_Method();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, method) {
              if (!data.uri_params) data.uri_params = {};
              data.uri_params['method'] = method;
            }(pos0, result0[1]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_ttl_param() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 4).toLowerCase() === "ttl=") {
            result0 = input.substr(pos, 4);
            pos += 4;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"ttl=\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_ttl();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, ttl) {
              if (!data.params) data.params = {};
              data.params['ttl'] = ttl;
            }(pos0, result0[1]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_maddr_param() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 6).toLowerCase() === "maddr=") {
            result0 = input.substr(pos, 6);
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"maddr=\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_host();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, maddr) {
              if (!data.uri_params) data.uri_params = {};
              data.uri_params['maddr'] = maddr;
            }(pos0, result0[1]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_lr_param() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 2).toLowerCase() === "lr") {
            result0 = input.substr(pos, 2);
            pos += 2;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"lr\"");
            }
          }
  
          if (result0 !== null) {
            pos2 = pos;
  
            if (input.charCodeAt(pos) === 61) {
              result1 = "=";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"=\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_token();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              if (!data.uri_params) data.uri_params = {};
              data.uri_params['lr'] = undefined;
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_other_param() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_pname();
  
          if (result0 !== null) {
            pos2 = pos;
  
            if (input.charCodeAt(pos) === 61) {
              result1 = "=";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"=\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_pvalue();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, param, value) {
              if (!data.uri_params) data.uri_params = {};
  
              if (typeof value === 'undefined') {
                value = undefined;
              } else {
                value = value[1];
              }
  
              data.uri_params[param.toLowerCase()] = value;
            }(pos0, result0[0], result0[1]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_pname() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_paramchar();
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_paramchar();
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset, pname) {
              return pname.join('');
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_pvalue() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_paramchar();
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_paramchar();
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset, pvalue) {
              return pvalue.join('');
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_paramchar() {
          var result0;
          result0 = parse_param_unreserved();
  
          if (result0 === null) {
            result0 = parse_unreserved();
  
            if (result0 === null) {
              result0 = parse_escaped();
            }
          }
  
          return result0;
        }
  
        function parse_param_unreserved() {
          var result0;
  
          if (input.charCodeAt(pos) === 91) {
            result0 = "[";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"[\"");
            }
          }
  
          if (result0 === null) {
            if (input.charCodeAt(pos) === 93) {
              result0 = "]";
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"]\"");
              }
            }
  
            if (result0 === null) {
              if (input.charCodeAt(pos) === 47) {
                result0 = "/";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"/\"");
                }
              }
  
              if (result0 === null) {
                if (input.charCodeAt(pos) === 58) {
                  result0 = ":";
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\":\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.charCodeAt(pos) === 38) {
                    result0 = "&";
                    pos++;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"&\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.charCodeAt(pos) === 43) {
                      result0 = "+";
                      pos++;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"+\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.charCodeAt(pos) === 36) {
                        result0 = "$";
                        pos++;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"$\"");
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_headers() {
          var result0, result1, result2, result3, result4;
          var pos0, pos1;
          pos0 = pos;
  
          if (input.charCodeAt(pos) === 63) {
            result0 = "?";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"?\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_header();
  
            if (result1 !== null) {
              result2 = [];
              pos1 = pos;
  
              if (input.charCodeAt(pos) === 38) {
                result3 = "&";
                pos++;
              } else {
                result3 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"&\"");
                }
              }
  
              if (result3 !== null) {
                result4 = parse_header();
  
                if (result4 !== null) {
                  result3 = [result3, result4];
                } else {
                  result3 = null;
                  pos = pos1;
                }
              } else {
                result3 = null;
                pos = pos1;
              }
  
              while (result3 !== null) {
                result2.push(result3);
                pos1 = pos;
  
                if (input.charCodeAt(pos) === 38) {
                  result3 = "&";
                  pos++;
                } else {
                  result3 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"&\"");
                  }
                }
  
                if (result3 !== null) {
                  result4 = parse_header();
  
                  if (result4 !== null) {
                    result3 = [result3, result4];
                  } else {
                    result3 = null;
                    pos = pos1;
                  }
                } else {
                  result3 = null;
                  pos = pos1;
                }
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_header() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_hname();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 61) {
              result1 = "=";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"=\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_hvalue();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, hname, hvalue) {
              hname = hname.join('').toLowerCase();
              hvalue = hvalue.join('');
              if (!data.uri_headers) data.uri_headers = {};
  
              if (!data.uri_headers[hname]) {
                data.uri_headers[hname] = [hvalue];
              } else {
                data.uri_headers[hname].push(hvalue);
              }
            }(pos0, result0[0], result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_hname() {
          var result0, result1;
          result1 = parse_hnv_unreserved();
  
          if (result1 === null) {
            result1 = parse_unreserved();
  
            if (result1 === null) {
              result1 = parse_escaped();
            }
          }
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_hnv_unreserved();
  
              if (result1 === null) {
                result1 = parse_unreserved();
  
                if (result1 === null) {
                  result1 = parse_escaped();
                }
              }
            }
          } else {
            result0 = null;
          }
  
          return result0;
        }
  
        function parse_hvalue() {
          var result0, result1;
          result0 = [];
          result1 = parse_hnv_unreserved();
  
          if (result1 === null) {
            result1 = parse_unreserved();
  
            if (result1 === null) {
              result1 = parse_escaped();
            }
          }
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_hnv_unreserved();
  
            if (result1 === null) {
              result1 = parse_unreserved();
  
              if (result1 === null) {
                result1 = parse_escaped();
              }
            }
          }
  
          return result0;
        }
  
        function parse_hnv_unreserved() {
          var result0;
  
          if (input.charCodeAt(pos) === 91) {
            result0 = "[";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"[\"");
            }
          }
  
          if (result0 === null) {
            if (input.charCodeAt(pos) === 93) {
              result0 = "]";
              pos++;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"]\"");
              }
            }
  
            if (result0 === null) {
              if (input.charCodeAt(pos) === 47) {
                result0 = "/";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"/\"");
                }
              }
  
              if (result0 === null) {
                if (input.charCodeAt(pos) === 63) {
                  result0 = "?";
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"?\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.charCodeAt(pos) === 58) {
                    result0 = ":";
                    pos++;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\":\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.charCodeAt(pos) === 43) {
                      result0 = "+";
                      pos++;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"+\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.charCodeAt(pos) === 36) {
                        result0 = "$";
                        pos++;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"$\"");
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_Request_Response() {
          var result0;
          result0 = parse_Status_Line();
  
          if (result0 === null) {
            result0 = parse_Request_Line();
          }
  
          return result0;
        }
  
        function parse_Request_Line() {
          var result0, result1, result2, result3, result4;
          var pos0;
          pos0 = pos;
          result0 = parse_Method();
  
          if (result0 !== null) {
            result1 = parse_SP();
  
            if (result1 !== null) {
              result2 = parse_Request_URI();
  
              if (result2 !== null) {
                result3 = parse_SP();
  
                if (result3 !== null) {
                  result4 = parse_SIP_Version();
  
                  if (result4 !== null) {
                    result0 = [result0, result1, result2, result3, result4];
                  } else {
                    result0 = null;
                    pos = pos0;
                  }
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Request_URI() {
          var result0;
          result0 = parse_SIP_URI();
  
          if (result0 === null) {
            result0 = parse_absoluteURI();
          }
  
          return result0;
        }
  
        function parse_absoluteURI() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_scheme();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 58) {
              result1 = ":";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\":\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_hier_part();
  
              if (result2 === null) {
                result2 = parse_opaque_part();
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_hier_part() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_net_path();
  
          if (result0 === null) {
            result0 = parse_abs_path();
          }
  
          if (result0 !== null) {
            pos1 = pos;
  
            if (input.charCodeAt(pos) === 63) {
              result1 = "?";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"?\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_query();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos1;
              }
            } else {
              result1 = null;
              pos = pos1;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_net_path() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 2) === "//") {
            result0 = "//";
            pos += 2;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"//\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_authority();
  
            if (result1 !== null) {
              result2 = parse_abs_path();
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_abs_path() {
          var result0, result1;
          var pos0;
          pos0 = pos;
  
          if (input.charCodeAt(pos) === 47) {
            result0 = "/";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"/\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_path_segments();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_opaque_part() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_uric_no_slash();
  
          if (result0 !== null) {
            result1 = [];
            result2 = parse_uric();
  
            while (result2 !== null) {
              result1.push(result2);
              result2 = parse_uric();
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_uric() {
          var result0;
          result0 = parse_reserved();
  
          if (result0 === null) {
            result0 = parse_unreserved();
  
            if (result0 === null) {
              result0 = parse_escaped();
            }
          }
  
          return result0;
        }
  
        function parse_uric_no_slash() {
          var result0;
          result0 = parse_unreserved();
  
          if (result0 === null) {
            result0 = parse_escaped();
  
            if (result0 === null) {
              if (input.charCodeAt(pos) === 59) {
                result0 = ";";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\";\"");
                }
              }
  
              if (result0 === null) {
                if (input.charCodeAt(pos) === 63) {
                  result0 = "?";
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"?\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.charCodeAt(pos) === 58) {
                    result0 = ":";
                    pos++;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\":\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.charCodeAt(pos) === 64) {
                      result0 = "@";
                      pos++;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"@\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.charCodeAt(pos) === 38) {
                        result0 = "&";
                        pos++;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"&\"");
                        }
                      }
  
                      if (result0 === null) {
                        if (input.charCodeAt(pos) === 61) {
                          result0 = "=";
                          pos++;
                        } else {
                          result0 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"=\"");
                          }
                        }
  
                        if (result0 === null) {
                          if (input.charCodeAt(pos) === 43) {
                            result0 = "+";
                            pos++;
                          } else {
                            result0 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"+\"");
                            }
                          }
  
                          if (result0 === null) {
                            if (input.charCodeAt(pos) === 36) {
                              result0 = "$";
                              pos++;
                            } else {
                              result0 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"$\"");
                              }
                            }
  
                            if (result0 === null) {
                              if (input.charCodeAt(pos) === 44) {
                                result0 = ",";
                                pos++;
                              } else {
                                result0 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\",\"");
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_path_segments() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_segment();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
  
            if (input.charCodeAt(pos) === 47) {
              result2 = "/";
              pos++;
            } else {
              result2 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"/\"");
              }
            }
  
            if (result2 !== null) {
              result3 = parse_segment();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
  
              if (input.charCodeAt(pos) === 47) {
                result2 = "/";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"/\"");
                }
              }
  
              if (result2 !== null) {
                result3 = parse_segment();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_segment() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = [];
          result1 = parse_pchar();
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_pchar();
          }
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
  
            if (input.charCodeAt(pos) === 59) {
              result2 = ";";
              pos++;
            } else {
              result2 = null;
  
              if (reportFailures === 0) {
                matchFailed("\";\"");
              }
            }
  
            if (result2 !== null) {
              result3 = parse_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
  
              if (input.charCodeAt(pos) === 59) {
                result2 = ";";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\";\"");
                }
              }
  
              if (result2 !== null) {
                result3 = parse_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_param() {
          var result0, result1;
          result0 = [];
          result1 = parse_pchar();
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_pchar();
          }
  
          return result0;
        }
  
        function parse_pchar() {
          var result0;
          result0 = parse_unreserved();
  
          if (result0 === null) {
            result0 = parse_escaped();
  
            if (result0 === null) {
              if (input.charCodeAt(pos) === 58) {
                result0 = ":";
                pos++;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\":\"");
                }
              }
  
              if (result0 === null) {
                if (input.charCodeAt(pos) === 64) {
                  result0 = "@";
                  pos++;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"@\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.charCodeAt(pos) === 38) {
                    result0 = "&";
                    pos++;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"&\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.charCodeAt(pos) === 61) {
                      result0 = "=";
                      pos++;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"=\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.charCodeAt(pos) === 43) {
                        result0 = "+";
                        pos++;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"+\"");
                        }
                      }
  
                      if (result0 === null) {
                        if (input.charCodeAt(pos) === 36) {
                          result0 = "$";
                          pos++;
                        } else {
                          result0 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"$\"");
                          }
                        }
  
                        if (result0 === null) {
                          if (input.charCodeAt(pos) === 44) {
                            result0 = ",";
                            pos++;
                          } else {
                            result0 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\",\"");
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_scheme() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_ALPHA();
  
          if (result0 !== null) {
            result1 = [];
            result2 = parse_ALPHA();
  
            if (result2 === null) {
              result2 = parse_DIGIT();
  
              if (result2 === null) {
                if (input.charCodeAt(pos) === 43) {
                  result2 = "+";
                  pos++;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"+\"");
                  }
                }
  
                if (result2 === null) {
                  if (input.charCodeAt(pos) === 45) {
                    result2 = "-";
                    pos++;
                  } else {
                    result2 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"-\"");
                    }
                  }
  
                  if (result2 === null) {
                    if (input.charCodeAt(pos) === 46) {
                      result2 = ".";
                      pos++;
                    } else {
                      result2 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\".\"");
                      }
                    }
                  }
                }
              }
            }
  
            while (result2 !== null) {
              result1.push(result2);
              result2 = parse_ALPHA();
  
              if (result2 === null) {
                result2 = parse_DIGIT();
  
                if (result2 === null) {
                  if (input.charCodeAt(pos) === 43) {
                    result2 = "+";
                    pos++;
                  } else {
                    result2 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"+\"");
                    }
                  }
  
                  if (result2 === null) {
                    if (input.charCodeAt(pos) === 45) {
                      result2 = "-";
                      pos++;
                    } else {
                      result2 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"-\"");
                      }
                    }
  
                    if (result2 === null) {
                      if (input.charCodeAt(pos) === 46) {
                        result2 = ".";
                        pos++;
                      } else {
                        result2 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\".\"");
                        }
                      }
                    }
                  }
                }
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.scheme = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_authority() {
          var result0;
          result0 = parse_srvr();
  
          if (result0 === null) {
            result0 = parse_reg_name();
          }
  
          return result0;
        }
  
        function parse_srvr() {
          var result0, result1;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_userinfo();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 64) {
              result1 = "@";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"@\"");
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          result0 = result0 !== null ? result0 : "";
  
          if (result0 !== null) {
            result1 = parse_hostport();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          result0 = result0 !== null ? result0 : "";
          return result0;
        }
  
        function parse_reg_name() {
          var result0, result1;
          result1 = parse_unreserved();
  
          if (result1 === null) {
            result1 = parse_escaped();
  
            if (result1 === null) {
              if (input.charCodeAt(pos) === 36) {
                result1 = "$";
                pos++;
              } else {
                result1 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"$\"");
                }
              }
  
              if (result1 === null) {
                if (input.charCodeAt(pos) === 44) {
                  result1 = ",";
                  pos++;
                } else {
                  result1 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\",\"");
                  }
                }
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 59) {
                    result1 = ";";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\";\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 58) {
                      result1 = ":";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\":\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 64) {
                        result1 = "@";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"@\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 38) {
                          result1 = "&";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"&\"");
                          }
                        }
  
                        if (result1 === null) {
                          if (input.charCodeAt(pos) === 61) {
                            result1 = "=";
                            pos++;
                          } else {
                            result1 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"=\"");
                            }
                          }
  
                          if (result1 === null) {
                            if (input.charCodeAt(pos) === 43) {
                              result1 = "+";
                              pos++;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"+\"");
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_unreserved();
  
              if (result1 === null) {
                result1 = parse_escaped();
  
                if (result1 === null) {
                  if (input.charCodeAt(pos) === 36) {
                    result1 = "$";
                    pos++;
                  } else {
                    result1 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"$\"");
                    }
                  }
  
                  if (result1 === null) {
                    if (input.charCodeAt(pos) === 44) {
                      result1 = ",";
                      pos++;
                    } else {
                      result1 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\",\"");
                      }
                    }
  
                    if (result1 === null) {
                      if (input.charCodeAt(pos) === 59) {
                        result1 = ";";
                        pos++;
                      } else {
                        result1 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\";\"");
                        }
                      }
  
                      if (result1 === null) {
                        if (input.charCodeAt(pos) === 58) {
                          result1 = ":";
                          pos++;
                        } else {
                          result1 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\":\"");
                          }
                        }
  
                        if (result1 === null) {
                          if (input.charCodeAt(pos) === 64) {
                            result1 = "@";
                            pos++;
                          } else {
                            result1 = null;
  
                            if (reportFailures === 0) {
                              matchFailed("\"@\"");
                            }
                          }
  
                          if (result1 === null) {
                            if (input.charCodeAt(pos) === 38) {
                              result1 = "&";
                              pos++;
                            } else {
                              result1 = null;
  
                              if (reportFailures === 0) {
                                matchFailed("\"&\"");
                              }
                            }
  
                            if (result1 === null) {
                              if (input.charCodeAt(pos) === 61) {
                                result1 = "=";
                                pos++;
                              } else {
                                result1 = null;
  
                                if (reportFailures === 0) {
                                  matchFailed("\"=\"");
                                }
                              }
  
                              if (result1 === null) {
                                if (input.charCodeAt(pos) === 43) {
                                  result1 = "+";
                                  pos++;
                                } else {
                                  result1 = null;
  
                                  if (reportFailures === 0) {
                                    matchFailed("\"+\"");
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          } else {
            result0 = null;
          }
  
          return result0;
        }
  
        function parse_query() {
          var result0, result1;
          result0 = [];
          result1 = parse_uric();
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_uric();
          }
  
          return result0;
        }
  
        function parse_SIP_Version() {
          var result0, result1, result2, result3, result4, result5;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 3).toLowerCase() === "sip") {
            result0 = input.substr(pos, 3);
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"SIP\"");
            }
          }
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 47) {
              result1 = "/";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"/\"");
              }
            }
  
            if (result1 !== null) {
              result3 = parse_DIGIT();
  
              if (result3 !== null) {
                result2 = [];
  
                while (result3 !== null) {
                  result2.push(result3);
                  result3 = parse_DIGIT();
                }
              } else {
                result2 = null;
              }
  
              if (result2 !== null) {
                if (input.charCodeAt(pos) === 46) {
                  result3 = ".";
                  pos++;
                } else {
                  result3 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\".\"");
                  }
                }
  
                if (result3 !== null) {
                  result5 = parse_DIGIT();
  
                  if (result5 !== null) {
                    result4 = [];
  
                    while (result5 !== null) {
                      result4.push(result5);
                      result5 = parse_DIGIT();
                    }
                  } else {
                    result4 = null;
                  }
  
                  if (result4 !== null) {
                    result0 = [result0, result1, result2, result3, result4];
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.sip_version = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_INVITEm() {
          var result0;
  
          if (input.substr(pos, 6) === "INVITE") {
            result0 = "INVITE";
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"INVITE\"");
            }
          }
  
          return result0;
        }
  
        function parse_ACKm() {
          var result0;
  
          if (input.substr(pos, 3) === "ACK") {
            result0 = "ACK";
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"ACK\"");
            }
          }
  
          return result0;
        }
  
        function parse_OPTIONSm() {
          var result0;
  
          if (input.substr(pos, 7) === "OPTIONS") {
            result0 = "OPTIONS";
            pos += 7;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"OPTIONS\"");
            }
          }
  
          return result0;
        }
  
        function parse_BYEm() {
          var result0;
  
          if (input.substr(pos, 3) === "BYE") {
            result0 = "BYE";
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"BYE\"");
            }
          }
  
          return result0;
        }
  
        function parse_CANCELm() {
          var result0;
  
          if (input.substr(pos, 6) === "CANCEL") {
            result0 = "CANCEL";
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"CANCEL\"");
            }
          }
  
          return result0;
        }
  
        function parse_REGISTERm() {
          var result0;
  
          if (input.substr(pos, 8) === "REGISTER") {
            result0 = "REGISTER";
            pos += 8;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"REGISTER\"");
            }
          }
  
          return result0;
        }
  
        function parse_SUBSCRIBEm() {
          var result0;
  
          if (input.substr(pos, 9) === "SUBSCRIBE") {
            result0 = "SUBSCRIBE";
            pos += 9;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"SUBSCRIBE\"");
            }
          }
  
          return result0;
        }
  
        function parse_NOTIFYm() {
          var result0;
  
          if (input.substr(pos, 6) === "NOTIFY") {
            result0 = "NOTIFY";
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"NOTIFY\"");
            }
          }
  
          return result0;
        }
  
        function parse_REFERm() {
          var result0;
  
          if (input.substr(pos, 5) === "REFER") {
            result0 = "REFER";
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"REFER\"");
            }
          }
  
          return result0;
        }
  
        function parse_Method() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_INVITEm();
  
          if (result0 === null) {
            result0 = parse_ACKm();
  
            if (result0 === null) {
              result0 = parse_OPTIONSm();
  
              if (result0 === null) {
                result0 = parse_BYEm();
  
                if (result0 === null) {
                  result0 = parse_CANCELm();
  
                  if (result0 === null) {
                    result0 = parse_REGISTERm();
  
                    if (result0 === null) {
                      result0 = parse_SUBSCRIBEm();
  
                      if (result0 === null) {
                        result0 = parse_NOTIFYm();
  
                        if (result0 === null) {
                          result0 = parse_REFERm();
  
                          if (result0 === null) {
                            result0 = parse_token();
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.method = input.substring(pos, offset);
              return data.method;
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Status_Line() {
          var result0, result1, result2, result3, result4;
          var pos0;
          pos0 = pos;
          result0 = parse_SIP_Version();
  
          if (result0 !== null) {
            result1 = parse_SP();
  
            if (result1 !== null) {
              result2 = parse_Status_Code();
  
              if (result2 !== null) {
                result3 = parse_SP();
  
                if (result3 !== null) {
                  result4 = parse_Reason_Phrase();
  
                  if (result4 !== null) {
                    result0 = [result0, result1, result2, result3, result4];
                  } else {
                    result0 = null;
                    pos = pos0;
                  }
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Status_Code() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_extension_code();
  
          if (result0 !== null) {
            result0 = function (offset, status_code) {
              data.status_code = parseInt(status_code.join(''));
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_extension_code() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_DIGIT();
  
          if (result0 !== null) {
            result1 = parse_DIGIT();
  
            if (result1 !== null) {
              result2 = parse_DIGIT();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Reason_Phrase() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result0 = [];
          result1 = parse_reserved();
  
          if (result1 === null) {
            result1 = parse_unreserved();
  
            if (result1 === null) {
              result1 = parse_escaped();
  
              if (result1 === null) {
                result1 = parse_UTF8_NONASCII();
  
                if (result1 === null) {
                  result1 = parse_UTF8_CONT();
  
                  if (result1 === null) {
                    result1 = parse_SP();
  
                    if (result1 === null) {
                      result1 = parse_HTAB();
                    }
                  }
                }
              }
            }
          }
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_reserved();
  
            if (result1 === null) {
              result1 = parse_unreserved();
  
              if (result1 === null) {
                result1 = parse_escaped();
  
                if (result1 === null) {
                  result1 = parse_UTF8_NONASCII();
  
                  if (result1 === null) {
                    result1 = parse_UTF8_CONT();
  
                    if (result1 === null) {
                      result1 = parse_SP();
  
                      if (result1 === null) {
                        result1 = parse_HTAB();
                      }
                    }
                  }
                }
              }
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.reason_phrase = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Allow_Events() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_event_type();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_COMMA();
  
            if (result2 !== null) {
              result3 = parse_event_type();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_event_type();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Call_ID() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_word();
  
          if (result0 !== null) {
            pos2 = pos;
  
            if (input.charCodeAt(pos) === 64) {
              result1 = "@";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"@\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_word();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Contact() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          result0 = parse_STAR();
  
          if (result0 === null) {
            pos1 = pos;
            result0 = parse_contact_param();
  
            if (result0 !== null) {
              result1 = [];
              pos2 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_contact_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
  
              while (result2 !== null) {
                result1.push(result2);
                pos2 = pos;
                result2 = parse_COMMA();
  
                if (result2 !== null) {
                  result3 = parse_contact_param();
  
                  if (result3 !== null) {
                    result2 = [result2, result3];
                  } else {
                    result2 = null;
                    pos = pos2;
                  }
                } else {
                  result2 = null;
                  pos = pos2;
                }
              }
  
              if (result1 !== null) {
                result0 = [result0, result1];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              var idx, length;
              length = data.multi_header.length;
  
              for (idx = 0; idx < length; idx++) {
                if (data.multi_header[idx].parsed === null) {
                  data = null;
                  break;
                }
              }
  
              if (data !== null) {
                data = data.multi_header;
              } else {
                data = -1;
              }
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_contact_param() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SIP_URI_noparams();
  
          if (result0 === null) {
            result0 = parse_name_addr();
          }
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_contact_params();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_contact_params();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              var header;
              if (!data.multi_header) data.multi_header = [];
  
              try {
                header = new NameAddrHeader(data.uri, data.display_name, data.params);
                delete data.uri;
                delete data.display_name;
                delete data.params;
              } catch (e) {
                header = null;
              }
  
              data.multi_header.push({
                'possition': pos,
                'offset': offset,
                'parsed': header
              });
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_name_addr() {
          var result0, result1, result2, result3;
          var pos0;
          pos0 = pos;
          result0 = parse_display_name();
          result0 = result0 !== null ? result0 : "";
  
          if (result0 !== null) {
            result1 = parse_LAQUOT();
  
            if (result1 !== null) {
              result2 = parse_SIP_URI();
  
              if (result2 !== null) {
                result3 = parse_RAQUOT();
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_display_name() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_LWS();
  
            if (result2 !== null) {
              result3 = parse_token();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_LWS();
  
              if (result2 !== null) {
                result3 = parse_token();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 === null) {
            result0 = parse_quoted_string_clean();
          }
  
          if (result0 !== null) {
            result0 = function (offset, display_name) {
              if (typeof display_name === 'string') {
                // quoted_string_clean
                data.display_name = display_name;
              } else {
                // token ( LWS token )*
                data.display_name = display_name[1].reduce(function (acc, cur) {
                  return acc + cur[0] + cur[1];
                }, display_name[0]);
              }
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_contact_params() {
          var result0;
          result0 = parse_c_p_q();
  
          if (result0 === null) {
            result0 = parse_c_p_expires();
  
            if (result0 === null) {
              result0 = parse_generic_param();
            }
          }
  
          return result0;
        }
  
        function parse_c_p_q() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 1).toLowerCase() === "q") {
            result0 = input.substr(pos, 1);
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"q\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_qvalue();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, q) {
              if (!data.params) data.params = {};
              data.params['q'] = q;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_c_p_expires() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 7).toLowerCase() === "expires") {
            result0 = input.substr(pos, 7);
            pos += 7;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"expires\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_delta_seconds();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, expires) {
              if (!data.params) data.params = {};
              data.params['expires'] = expires;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_delta_seconds() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_DIGIT();
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_DIGIT();
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset, delta_seconds) {
              return parseInt(delta_seconds.join(''));
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_qvalue() {
          var result0, result1, result2, result3, result4;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
  
          if (input.charCodeAt(pos) === 48) {
            result0 = "0";
            pos++;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"0\"");
            }
          }
  
          if (result0 !== null) {
            pos2 = pos;
  
            if (input.charCodeAt(pos) === 46) {
              result1 = ".";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\".\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_DIGIT();
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result3 = parse_DIGIT();
                result3 = result3 !== null ? result3 : "";
  
                if (result3 !== null) {
                  result4 = parse_DIGIT();
                  result4 = result4 !== null ? result4 : "";
  
                  if (result4 !== null) {
                    result1 = [result1, result2, result3, result4];
                  } else {
                    result1 = null;
                    pos = pos2;
                  }
                } else {
                  result1 = null;
                  pos = pos2;
                }
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              return parseFloat(input.substring(pos, offset));
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_generic_param() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            pos2 = pos;
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_gen_value();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, param, value) {
              if (!data.params) data.params = {};
  
              if (typeof value === 'undefined') {
                value = undefined;
              } else {
                value = value[1];
              }
  
              data.params[param.toLowerCase()] = value;
            }(pos0, result0[0], result0[1]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_gen_value() {
          var result0;
          result0 = parse_token();
  
          if (result0 === null) {
            result0 = parse_host();
  
            if (result0 === null) {
              result0 = parse_quoted_string();
            }
          }
  
          return result0;
        }
  
        function parse_Content_Disposition() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_disp_type();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_disp_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_disp_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_disp_type() {
          var result0;
  
          if (input.substr(pos, 6).toLowerCase() === "render") {
            result0 = input.substr(pos, 6);
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"render\"");
            }
          }
  
          if (result0 === null) {
            if (input.substr(pos, 7).toLowerCase() === "session") {
              result0 = input.substr(pos, 7);
              pos += 7;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"session\"");
              }
            }
  
            if (result0 === null) {
              if (input.substr(pos, 4).toLowerCase() === "icon") {
                result0 = input.substr(pos, 4);
                pos += 4;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"icon\"");
                }
              }
  
              if (result0 === null) {
                if (input.substr(pos, 5).toLowerCase() === "alert") {
                  result0 = input.substr(pos, 5);
                  pos += 5;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"alert\"");
                  }
                }
  
                if (result0 === null) {
                  result0 = parse_token();
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_disp_param() {
          var result0;
          result0 = parse_handling_param();
  
          if (result0 === null) {
            result0 = parse_generic_param();
          }
  
          return result0;
        }
  
        function parse_handling_param() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 8).toLowerCase() === "handling") {
            result0 = input.substr(pos, 8);
            pos += 8;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"handling\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              if (input.substr(pos, 8).toLowerCase() === "optional") {
                result2 = input.substr(pos, 8);
                pos += 8;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"optional\"");
                }
              }
  
              if (result2 === null) {
                if (input.substr(pos, 8).toLowerCase() === "required") {
                  result2 = input.substr(pos, 8);
                  pos += 8;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"required\"");
                  }
                }
  
                if (result2 === null) {
                  result2 = parse_token();
                }
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Content_Encoding() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_COMMA();
  
            if (result2 !== null) {
              result3 = parse_token();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_token();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Content_Length() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_DIGIT();
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_DIGIT();
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset, length) {
              data = parseInt(length.join(''));
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Content_Type() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_media_type();
  
          if (result0 !== null) {
            result0 = function (offset) {
              data = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_media_type() {
          var result0, result1, result2, result3, result4, result5;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_m_type();
  
          if (result0 !== null) {
            result1 = parse_SLASH();
  
            if (result1 !== null) {
              result2 = parse_m_subtype();
  
              if (result2 !== null) {
                result3 = [];
                pos1 = pos;
                result4 = parse_SEMI();
  
                if (result4 !== null) {
                  result5 = parse_m_parameter();
  
                  if (result5 !== null) {
                    result4 = [result4, result5];
                  } else {
                    result4 = null;
                    pos = pos1;
                  }
                } else {
                  result4 = null;
                  pos = pos1;
                }
  
                while (result4 !== null) {
                  result3.push(result4);
                  pos1 = pos;
                  result4 = parse_SEMI();
  
                  if (result4 !== null) {
                    result5 = parse_m_parameter();
  
                    if (result5 !== null) {
                      result4 = [result4, result5];
                    } else {
                      result4 = null;
                      pos = pos1;
                    }
                  } else {
                    result4 = null;
                    pos = pos1;
                  }
                }
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_m_type() {
          var result0;
          result0 = parse_discrete_type();
  
          if (result0 === null) {
            result0 = parse_composite_type();
          }
  
          return result0;
        }
  
        function parse_discrete_type() {
          var result0;
  
          if (input.substr(pos, 4).toLowerCase() === "text") {
            result0 = input.substr(pos, 4);
            pos += 4;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"text\"");
            }
          }
  
          if (result0 === null) {
            if (input.substr(pos, 5).toLowerCase() === "image") {
              result0 = input.substr(pos, 5);
              pos += 5;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"image\"");
              }
            }
  
            if (result0 === null) {
              if (input.substr(pos, 5).toLowerCase() === "audio") {
                result0 = input.substr(pos, 5);
                pos += 5;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"audio\"");
                }
              }
  
              if (result0 === null) {
                if (input.substr(pos, 5).toLowerCase() === "video") {
                  result0 = input.substr(pos, 5);
                  pos += 5;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"video\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.substr(pos, 11).toLowerCase() === "application") {
                    result0 = input.substr(pos, 11);
                    pos += 11;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"application\"");
                    }
                  }
  
                  if (result0 === null) {
                    result0 = parse_extension_token();
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_composite_type() {
          var result0;
  
          if (input.substr(pos, 7).toLowerCase() === "message") {
            result0 = input.substr(pos, 7);
            pos += 7;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"message\"");
            }
          }
  
          if (result0 === null) {
            if (input.substr(pos, 9).toLowerCase() === "multipart") {
              result0 = input.substr(pos, 9);
              pos += 9;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"multipart\"");
              }
            }
  
            if (result0 === null) {
              result0 = parse_extension_token();
            }
          }
  
          return result0;
        }
  
        function parse_extension_token() {
          var result0;
          result0 = parse_token();
  
          if (result0 === null) {
            result0 = parse_x_token();
          }
  
          return result0;
        }
  
        function parse_x_token() {
          var result0, result1;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 2).toLowerCase() === "x-") {
            result0 = input.substr(pos, 2);
            pos += 2;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"x-\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_token();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_m_subtype() {
          var result0;
          result0 = parse_extension_token();
  
          if (result0 === null) {
            result0 = parse_token();
          }
  
          return result0;
        }
  
        function parse_m_parameter() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_m_value();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_m_value() {
          var result0;
          result0 = parse_token();
  
          if (result0 === null) {
            result0 = parse_quoted_string();
          }
  
          return result0;
        }
  
        function parse_CSeq() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_CSeq_value();
  
          if (result0 !== null) {
            result1 = parse_LWS();
  
            if (result1 !== null) {
              result2 = parse_Method();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_CSeq_value() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_DIGIT();
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_DIGIT();
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset, cseq_value) {
              data.value = parseInt(cseq_value.join(''));
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Expires() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_delta_seconds();
  
          if (result0 !== null) {
            result0 = function (offset, expires) {
              data = expires;
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Event() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_event_type();
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_generic_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_generic_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, event_type) {
              data.event = event_type.join('').toLowerCase();
            }(pos0, result0[0]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_event_type() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_token_nodot();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
  
            if (input.charCodeAt(pos) === 46) {
              result2 = ".";
              pos++;
            } else {
              result2 = null;
  
              if (reportFailures === 0) {
                matchFailed("\".\"");
              }
            }
  
            if (result2 !== null) {
              result3 = parse_token_nodot();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
  
              if (input.charCodeAt(pos) === 46) {
                result2 = ".";
                pos++;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\".\"");
                }
              }
  
              if (result2 !== null) {
                result3 = parse_token_nodot();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_From() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SIP_URI_noparams();
  
          if (result0 === null) {
            result0 = parse_name_addr();
          }
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_from_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_from_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              var tag = data.tag;
  
              try {
                data = new NameAddrHeader(data.uri, data.display_name, data.params);
  
                if (tag) {
                  data.setParam('tag', tag);
                }
              } catch (e) {
                data = -1;
              }
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_from_param() {
          var result0;
          result0 = parse_tag_param();
  
          if (result0 === null) {
            result0 = parse_generic_param();
          }
  
          return result0;
        }
  
        function parse_tag_param() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 3).toLowerCase() === "tag") {
            result0 = input.substr(pos, 3);
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"tag\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_token();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, tag) {
              data.tag = tag;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Max_Forwards() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result1 = parse_DIGIT();
  
          if (result1 !== null) {
            result0 = [];
  
            while (result1 !== null) {
              result0.push(result1);
              result1 = parse_DIGIT();
            }
          } else {
            result0 = null;
          }
  
          if (result0 !== null) {
            result0 = function (offset, forwards) {
              data = parseInt(forwards.join(''));
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Min_Expires() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_delta_seconds();
  
          if (result0 !== null) {
            result0 = function (offset, min_expires) {
              data = min_expires;
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Name_Addr_Header() {
          var result0, result1, result2, result3, result4, result5, result6;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = [];
          result1 = parse_display_name();
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_display_name();
          }
  
          if (result0 !== null) {
            result1 = parse_LAQUOT();
  
            if (result1 !== null) {
              result2 = parse_SIP_URI();
  
              if (result2 !== null) {
                result3 = parse_RAQUOT();
  
                if (result3 !== null) {
                  result4 = [];
                  pos2 = pos;
                  result5 = parse_SEMI();
  
                  if (result5 !== null) {
                    result6 = parse_generic_param();
  
                    if (result6 !== null) {
                      result5 = [result5, result6];
                    } else {
                      result5 = null;
                      pos = pos2;
                    }
                  } else {
                    result5 = null;
                    pos = pos2;
                  }
  
                  while (result5 !== null) {
                    result4.push(result5);
                    pos2 = pos;
                    result5 = parse_SEMI();
  
                    if (result5 !== null) {
                      result6 = parse_generic_param();
  
                      if (result6 !== null) {
                        result5 = [result5, result6];
                      } else {
                        result5 = null;
                        pos = pos2;
                      }
                    } else {
                      result5 = null;
                      pos = pos2;
                    }
                  }
  
                  if (result4 !== null) {
                    result0 = [result0, result1, result2, result3, result4];
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              try {
                data = new NameAddrHeader(data.uri, data.display_name, data.params);
              } catch (e) {
                data = -1;
              }
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Proxy_Authenticate() {
          var result0;
          result0 = parse_challenge();
          return result0;
        }
  
        function parse_challenge() {
          var result0, result1, result2, result3, result4, result5;
          var pos0, pos1;
          pos0 = pos;
  
          if (input.substr(pos, 6).toLowerCase() === "digest") {
            result0 = input.substr(pos, 6);
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"Digest\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_LWS();
  
            if (result1 !== null) {
              result2 = parse_digest_cln();
  
              if (result2 !== null) {
                result3 = [];
                pos1 = pos;
                result4 = parse_COMMA();
  
                if (result4 !== null) {
                  result5 = parse_digest_cln();
  
                  if (result5 !== null) {
                    result4 = [result4, result5];
                  } else {
                    result4 = null;
                    pos = pos1;
                  }
                } else {
                  result4 = null;
                  pos = pos1;
                }
  
                while (result4 !== null) {
                  result3.push(result4);
                  pos1 = pos;
                  result4 = parse_COMMA();
  
                  if (result4 !== null) {
                    result5 = parse_digest_cln();
  
                    if (result5 !== null) {
                      result4 = [result4, result5];
                    } else {
                      result4 = null;
                      pos = pos1;
                    }
                  } else {
                    result4 = null;
                    pos = pos1;
                  }
                }
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          if (result0 === null) {
            result0 = parse_other_challenge();
          }
  
          return result0;
        }
  
        function parse_other_challenge() {
          var result0, result1, result2, result3, result4, result5;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = parse_LWS();
  
            if (result1 !== null) {
              result2 = parse_auth_param();
  
              if (result2 !== null) {
                result3 = [];
                pos1 = pos;
                result4 = parse_COMMA();
  
                if (result4 !== null) {
                  result5 = parse_auth_param();
  
                  if (result5 !== null) {
                    result4 = [result4, result5];
                  } else {
                    result4 = null;
                    pos = pos1;
                  }
                } else {
                  result4 = null;
                  pos = pos1;
                }
  
                while (result4 !== null) {
                  result3.push(result4);
                  pos1 = pos;
                  result4 = parse_COMMA();
  
                  if (result4 !== null) {
                    result5 = parse_auth_param();
  
                    if (result5 !== null) {
                      result4 = [result4, result5];
                    } else {
                      result4 = null;
                      pos = pos1;
                    }
                  } else {
                    result4 = null;
                    pos = pos1;
                  }
                }
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_auth_param() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_token();
  
              if (result2 === null) {
                result2 = parse_quoted_string();
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_digest_cln() {
          var result0;
          result0 = parse_realm();
  
          if (result0 === null) {
            result0 = parse_domain();
  
            if (result0 === null) {
              result0 = parse_nonce();
  
              if (result0 === null) {
                result0 = parse_opaque();
  
                if (result0 === null) {
                  result0 = parse_stale();
  
                  if (result0 === null) {
                    result0 = parse_algorithm();
  
                    if (result0 === null) {
                      result0 = parse_qop_options();
  
                      if (result0 === null) {
                        result0 = parse_auth_param();
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_realm() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 5).toLowerCase() === "realm") {
            result0 = input.substr(pos, 5);
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"realm\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_realm_value();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_realm_value() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_quoted_string_clean();
  
          if (result0 !== null) {
            result0 = function (offset, realm) {
              data.realm = realm;
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_domain() {
          var result0, result1, result2, result3, result4, result5, result6;
          var pos0, pos1;
          pos0 = pos;
  
          if (input.substr(pos, 6).toLowerCase() === "domain") {
            result0 = input.substr(pos, 6);
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"domain\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_LDQUOT();
  
              if (result2 !== null) {
                result3 = parse_URI();
  
                if (result3 !== null) {
                  result4 = [];
                  pos1 = pos;
                  result6 = parse_SP();
  
                  if (result6 !== null) {
                    result5 = [];
  
                    while (result6 !== null) {
                      result5.push(result6);
                      result6 = parse_SP();
                    }
                  } else {
                    result5 = null;
                  }
  
                  if (result5 !== null) {
                    result6 = parse_URI();
  
                    if (result6 !== null) {
                      result5 = [result5, result6];
                    } else {
                      result5 = null;
                      pos = pos1;
                    }
                  } else {
                    result5 = null;
                    pos = pos1;
                  }
  
                  while (result5 !== null) {
                    result4.push(result5);
                    pos1 = pos;
                    result6 = parse_SP();
  
                    if (result6 !== null) {
                      result5 = [];
  
                      while (result6 !== null) {
                        result5.push(result6);
                        result6 = parse_SP();
                      }
                    } else {
                      result5 = null;
                    }
  
                    if (result5 !== null) {
                      result6 = parse_URI();
  
                      if (result6 !== null) {
                        result5 = [result5, result6];
                      } else {
                        result5 = null;
                        pos = pos1;
                      }
                    } else {
                      result5 = null;
                      pos = pos1;
                    }
                  }
  
                  if (result4 !== null) {
                    result5 = parse_RDQUOT();
  
                    if (result5 !== null) {
                      result0 = [result0, result1, result2, result3, result4, result5];
                    } else {
                      result0 = null;
                      pos = pos0;
                    }
                  } else {
                    result0 = null;
                    pos = pos0;
                  }
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_URI() {
          var result0;
          result0 = parse_absoluteURI();
  
          if (result0 === null) {
            result0 = parse_abs_path();
          }
  
          return result0;
        }
  
        function parse_nonce() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 5).toLowerCase() === "nonce") {
            result0 = input.substr(pos, 5);
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"nonce\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_nonce_value();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_nonce_value() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_quoted_string_clean();
  
          if (result0 !== null) {
            result0 = function (offset, nonce) {
              data.nonce = nonce;
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_opaque() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 6).toLowerCase() === "opaque") {
            result0 = input.substr(pos, 6);
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"opaque\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_quoted_string_clean();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, opaque) {
              data.opaque = opaque;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_stale() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
  
          if (input.substr(pos, 5).toLowerCase() === "stale") {
            result0 = input.substr(pos, 5);
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"stale\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              pos1 = pos;
  
              if (input.substr(pos, 4).toLowerCase() === "true") {
                result2 = input.substr(pos, 4);
                pos += 4;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"true\"");
                }
              }
  
              if (result2 !== null) {
                result2 = function (offset) {
                  data.stale = true;
                }(pos1);
              }
  
              if (result2 === null) {
                pos = pos1;
              }
  
              if (result2 === null) {
                pos1 = pos;
  
                if (input.substr(pos, 5).toLowerCase() === "false") {
                  result2 = input.substr(pos, 5);
                  pos += 5;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"false\"");
                  }
                }
  
                if (result2 !== null) {
                  result2 = function (offset) {
                    data.stale = false;
                  }(pos1);
                }
  
                if (result2 === null) {
                  pos = pos1;
                }
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_algorithm() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 9).toLowerCase() === "algorithm") {
            result0 = input.substr(pos, 9);
            pos += 9;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"algorithm\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              if (input.substr(pos, 3).toLowerCase() === "md5") {
                result2 = input.substr(pos, 3);
                pos += 3;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"MD5\"");
                }
              }
  
              if (result2 === null) {
                if (input.substr(pos, 8).toLowerCase() === "md5-sess") {
                  result2 = input.substr(pos, 8);
                  pos += 8;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"MD5-sess\"");
                  }
                }
  
                if (result2 === null) {
                  result2 = parse_token();
                }
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, algorithm) {
              data.algorithm = algorithm.toUpperCase();
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_qop_options() {
          var result0, result1, result2, result3, result4, result5, result6;
          var pos0, pos1, pos2;
          pos0 = pos;
  
          if (input.substr(pos, 3).toLowerCase() === "qop") {
            result0 = input.substr(pos, 3);
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"qop\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_LDQUOT();
  
              if (result2 !== null) {
                pos1 = pos;
                result3 = parse_qop_value();
  
                if (result3 !== null) {
                  result4 = [];
                  pos2 = pos;
  
                  if (input.charCodeAt(pos) === 44) {
                    result5 = ",";
                    pos++;
                  } else {
                    result5 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\",\"");
                    }
                  }
  
                  if (result5 !== null) {
                    result6 = parse_qop_value();
  
                    if (result6 !== null) {
                      result5 = [result5, result6];
                    } else {
                      result5 = null;
                      pos = pos2;
                    }
                  } else {
                    result5 = null;
                    pos = pos2;
                  }
  
                  while (result5 !== null) {
                    result4.push(result5);
                    pos2 = pos;
  
                    if (input.charCodeAt(pos) === 44) {
                      result5 = ",";
                      pos++;
                    } else {
                      result5 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\",\"");
                      }
                    }
  
                    if (result5 !== null) {
                      result6 = parse_qop_value();
  
                      if (result6 !== null) {
                        result5 = [result5, result6];
                      } else {
                        result5 = null;
                        pos = pos2;
                      }
                    } else {
                      result5 = null;
                      pos = pos2;
                    }
                  }
  
                  if (result4 !== null) {
                    result3 = [result3, result4];
                  } else {
                    result3 = null;
                    pos = pos1;
                  }
                } else {
                  result3 = null;
                  pos = pos1;
                }
  
                if (result3 !== null) {
                  result4 = parse_RDQUOT();
  
                  if (result4 !== null) {
                    result0 = [result0, result1, result2, result3, result4];
                  } else {
                    result0 = null;
                    pos = pos0;
                  }
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_qop_value() {
          var result0;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 8).toLowerCase() === "auth-int") {
            result0 = input.substr(pos, 8);
            pos += 8;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"auth-int\"");
            }
          }
  
          if (result0 === null) {
            if (input.substr(pos, 4).toLowerCase() === "auth") {
              result0 = input.substr(pos, 4);
              pos += 4;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"auth\"");
              }
            }
  
            if (result0 === null) {
              result0 = parse_token();
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset, qop_value) {
              data.qop || (data.qop = []);
              data.qop.push(qop_value.toLowerCase());
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Proxy_Require() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_COMMA();
  
            if (result2 !== null) {
              result3 = parse_token();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_token();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Record_Route() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_rec_route();
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_COMMA();
  
            if (result2 !== null) {
              result3 = parse_rec_route();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_rec_route();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              var idx, length;
              length = data.multi_header.length;
  
              for (idx = 0; idx < length; idx++) {
                if (data.multi_header[idx].parsed === null) {
                  data = null;
                  break;
                }
              }
  
              if (data !== null) {
                data = data.multi_header;
              } else {
                data = -1;
              }
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_rec_route() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_name_addr();
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_generic_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_generic_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              var header;
              if (!data.multi_header) data.multi_header = [];
  
              try {
                header = new NameAddrHeader(data.uri, data.display_name, data.params);
                delete data.uri;
                delete data.display_name;
                delete data.params;
              } catch (e) {
                header = null;
              }
  
              data.multi_header.push({
                'possition': pos,
                'offset': offset,
                'parsed': header
              });
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Reason() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 3).toLowerCase() === "sip") {
            result0 = input.substr(pos, 3);
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"SIP\"");
            }
          }
  
          if (result0 === null) {
            result0 = parse_token();
          }
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_reason_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_reason_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, protocol) {
              data.protocol = protocol.toLowerCase();
              if (!data.params) data.params = {};
  
              if (data.params.text && data.params.text[0] === '"') {
                var text = data.params.text;
                data.text = text.substring(1, text.length - 1);
                delete data.params.text;
              }
            }(pos0, result0[0]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_reason_param() {
          var result0;
          result0 = parse_reason_cause();
  
          if (result0 === null) {
            result0 = parse_generic_param();
          }
  
          return result0;
        }
  
        function parse_reason_cause() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 5).toLowerCase() === "cause") {
            result0 = input.substr(pos, 5);
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"cause\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result3 = parse_DIGIT();
  
              if (result3 !== null) {
                result2 = [];
  
                while (result3 !== null) {
                  result2.push(result3);
                  result3 = parse_DIGIT();
                }
              } else {
                result2 = null;
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, cause) {
              data.cause = parseInt(cause.join(''));
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Require() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_COMMA();
  
            if (result2 !== null) {
              result3 = parse_token();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_token();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Route() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_route_param();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_COMMA();
  
            if (result2 !== null) {
              result3 = parse_route_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_route_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_route_param() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_name_addr();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_generic_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_generic_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Subscription_State() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_substate_value();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_subexp_params();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_subexp_params();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_substate_value() {
          var result0;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 6).toLowerCase() === "active") {
            result0 = input.substr(pos, 6);
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"active\"");
            }
          }
  
          if (result0 === null) {
            if (input.substr(pos, 7).toLowerCase() === "pending") {
              result0 = input.substr(pos, 7);
              pos += 7;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"pending\"");
              }
            }
  
            if (result0 === null) {
              if (input.substr(pos, 10).toLowerCase() === "terminated") {
                result0 = input.substr(pos, 10);
                pos += 10;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"terminated\"");
                }
              }
  
              if (result0 === null) {
                result0 = parse_token();
              }
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.state = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_subexp_params() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 6).toLowerCase() === "reason") {
            result0 = input.substr(pos, 6);
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"reason\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_event_reason_value();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, reason) {
              if (typeof reason !== 'undefined') data.reason = reason;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          if (result0 === null) {
            pos0 = pos;
            pos1 = pos;
  
            if (input.substr(pos, 7).toLowerCase() === "expires") {
              result0 = input.substr(pos, 7);
              pos += 7;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"expires\"");
              }
            }
  
            if (result0 !== null) {
              result1 = parse_EQUAL();
  
              if (result1 !== null) {
                result2 = parse_delta_seconds();
  
                if (result2 !== null) {
                  result0 = [result0, result1, result2];
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
  
            if (result0 !== null) {
              result0 = function (offset, expires) {
                if (typeof expires !== 'undefined') data.expires = expires;
              }(pos0, result0[2]);
            }
  
            if (result0 === null) {
              pos = pos0;
            }
  
            if (result0 === null) {
              pos0 = pos;
              pos1 = pos;
  
              if (input.substr(pos, 11).toLowerCase() === "retry_after") {
                result0 = input.substr(pos, 11);
                pos += 11;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"retry_after\"");
                }
              }
  
              if (result0 !== null) {
                result1 = parse_EQUAL();
  
                if (result1 !== null) {
                  result2 = parse_delta_seconds();
  
                  if (result2 !== null) {
                    result0 = [result0, result1, result2];
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
  
              if (result0 !== null) {
                result0 = function (offset, retry_after) {
                  if (typeof retry_after !== 'undefined') data.retry_after = retry_after;
                }(pos0, result0[2]);
              }
  
              if (result0 === null) {
                pos = pos0;
              }
  
              if (result0 === null) {
                result0 = parse_generic_param();
              }
            }
          }
  
          return result0;
        }
  
        function parse_event_reason_value() {
          var result0;
  
          if (input.substr(pos, 11).toLowerCase() === "deactivated") {
            result0 = input.substr(pos, 11);
            pos += 11;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"deactivated\"");
            }
          }
  
          if (result0 === null) {
            if (input.substr(pos, 9).toLowerCase() === "probation") {
              result0 = input.substr(pos, 9);
              pos += 9;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"probation\"");
              }
            }
  
            if (result0 === null) {
              if (input.substr(pos, 8).toLowerCase() === "rejected") {
                result0 = input.substr(pos, 8);
                pos += 8;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"rejected\"");
                }
              }
  
              if (result0 === null) {
                if (input.substr(pos, 7).toLowerCase() === "timeout") {
                  result0 = input.substr(pos, 7);
                  pos += 7;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"timeout\"");
                  }
                }
  
                if (result0 === null) {
                  if (input.substr(pos, 6).toLowerCase() === "giveup") {
                    result0 = input.substr(pos, 6);
                    pos += 6;
                  } else {
                    result0 = null;
  
                    if (reportFailures === 0) {
                      matchFailed("\"giveup\"");
                    }
                  }
  
                  if (result0 === null) {
                    if (input.substr(pos, 10).toLowerCase() === "noresource") {
                      result0 = input.substr(pos, 10);
                      pos += 10;
                    } else {
                      result0 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"noresource\"");
                      }
                    }
  
                    if (result0 === null) {
                      if (input.substr(pos, 9).toLowerCase() === "invariant") {
                        result0 = input.substr(pos, 9);
                        pos += 9;
                      } else {
                        result0 = null;
  
                        if (reportFailures === 0) {
                          matchFailed("\"invariant\"");
                        }
                      }
  
                      if (result0 === null) {
                        result0 = parse_token();
                      }
                    }
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_Subject() {
          var result0;
          result0 = parse_TEXT_UTF8_TRIM();
          result0 = result0 !== null ? result0 : "";
          return result0;
        }
  
        function parse_Supported() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_COMMA();
  
            if (result2 !== null) {
              result3 = parse_token();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_token();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          result0 = result0 !== null ? result0 : "";
          return result0;
        }
  
        function parse_To() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SIP_URI_noparams();
  
          if (result0 === null) {
            result0 = parse_name_addr();
          }
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_to_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_to_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              var tag = data.tag;
  
              try {
                data = new NameAddrHeader(data.uri, data.display_name, data.params);
  
                if (tag) {
                  data.setParam('tag', tag);
                }
              } catch (e) {
                data = -1;
              }
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_to_param() {
          var result0;
          result0 = parse_tag_param();
  
          if (result0 === null) {
            result0 = parse_generic_param();
          }
  
          return result0;
        }
  
        function parse_Via() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_via_param();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_COMMA();
  
            if (result2 !== null) {
              result3 = parse_via_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_COMMA();
  
              if (result2 !== null) {
                result3 = parse_via_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_via_param() {
          var result0, result1, result2, result3, result4, result5;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_sent_protocol();
  
          if (result0 !== null) {
            result1 = parse_LWS();
  
            if (result1 !== null) {
              result2 = parse_sent_by();
  
              if (result2 !== null) {
                result3 = [];
                pos1 = pos;
                result4 = parse_SEMI();
  
                if (result4 !== null) {
                  result5 = parse_via_params();
  
                  if (result5 !== null) {
                    result4 = [result4, result5];
                  } else {
                    result4 = null;
                    pos = pos1;
                  }
                } else {
                  result4 = null;
                  pos = pos1;
                }
  
                while (result4 !== null) {
                  result3.push(result4);
                  pos1 = pos;
                  result4 = parse_SEMI();
  
                  if (result4 !== null) {
                    result5 = parse_via_params();
  
                    if (result5 !== null) {
                      result4 = [result4, result5];
                    } else {
                      result4 = null;
                      pos = pos1;
                    }
                  } else {
                    result4 = null;
                    pos = pos1;
                  }
                }
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_via_params() {
          var result0;
          result0 = parse_via_ttl();
  
          if (result0 === null) {
            result0 = parse_via_maddr();
  
            if (result0 === null) {
              result0 = parse_via_received();
  
              if (result0 === null) {
                result0 = parse_via_branch();
  
                if (result0 === null) {
                  result0 = parse_response_port();
  
                  if (result0 === null) {
                    result0 = parse_generic_param();
                  }
                }
              }
            }
          }
  
          return result0;
        }
  
        function parse_via_ttl() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 3).toLowerCase() === "ttl") {
            result0 = input.substr(pos, 3);
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"ttl\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_ttl();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, via_ttl_value) {
              data.ttl = via_ttl_value;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_via_maddr() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 5).toLowerCase() === "maddr") {
            result0 = input.substr(pos, 5);
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"maddr\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_host();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, via_maddr) {
              data.maddr = via_maddr;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_via_received() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 8).toLowerCase() === "received") {
            result0 = input.substr(pos, 8);
            pos += 8;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"received\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_IPv4address();
  
              if (result2 === null) {
                result2 = parse_IPv6address();
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, via_received) {
              data.received = via_received;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_via_branch() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 6).toLowerCase() === "branch") {
            result0 = input.substr(pos, 6);
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"branch\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_token();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, via_branch) {
              data.branch = via_branch;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_response_port() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 5).toLowerCase() === "rport") {
            result0 = input.substr(pos, 5);
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"rport\"");
            }
          }
  
          if (result0 !== null) {
            pos2 = pos;
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = [];
              result3 = parse_DIGIT();
  
              while (result3 !== null) {
                result2.push(result3);
                result3 = parse_DIGIT();
              }
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              if (typeof response_port !== 'undefined') data.rport = response_port.join('');
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_sent_protocol() {
          var result0, result1, result2, result3, result4;
          var pos0;
          pos0 = pos;
          result0 = parse_protocol_name();
  
          if (result0 !== null) {
            result1 = parse_SLASH();
  
            if (result1 !== null) {
              result2 = parse_token();
  
              if (result2 !== null) {
                result3 = parse_SLASH();
  
                if (result3 !== null) {
                  result4 = parse_transport();
  
                  if (result4 !== null) {
                    result0 = [result0, result1, result2, result3, result4];
                  } else {
                    result0 = null;
                    pos = pos0;
                  }
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_protocol_name() {
          var result0;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 3).toLowerCase() === "sip") {
            result0 = input.substr(pos, 3);
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"SIP\"");
            }
          }
  
          if (result0 === null) {
            result0 = parse_token();
          }
  
          if (result0 !== null) {
            result0 = function (offset, via_protocol) {
              data.protocol = via_protocol;
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_transport() {
          var result0;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 3).toLowerCase() === "udp") {
            result0 = input.substr(pos, 3);
            pos += 3;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"UDP\"");
            }
          }
  
          if (result0 === null) {
            if (input.substr(pos, 3).toLowerCase() === "tcp") {
              result0 = input.substr(pos, 3);
              pos += 3;
            } else {
              result0 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"TCP\"");
              }
            }
  
            if (result0 === null) {
              if (input.substr(pos, 3).toLowerCase() === "tls") {
                result0 = input.substr(pos, 3);
                pos += 3;
              } else {
                result0 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"TLS\"");
                }
              }
  
              if (result0 === null) {
                if (input.substr(pos, 4).toLowerCase() === "sctp") {
                  result0 = input.substr(pos, 4);
                  pos += 4;
                } else {
                  result0 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"SCTP\"");
                  }
                }
  
                if (result0 === null) {
                  result0 = parse_token();
                }
              }
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset, via_transport) {
              data.transport = via_transport;
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_sent_by() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_via_host();
  
          if (result0 !== null) {
            pos1 = pos;
            result1 = parse_COLON();
  
            if (result1 !== null) {
              result2 = parse_via_port();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos1;
              }
            } else {
              result1 = null;
              pos = pos1;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_via_host() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_IPv4address();
  
          if (result0 === null) {
            result0 = parse_IPv6reference();
  
            if (result0 === null) {
              result0 = parse_hostname();
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.host = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_via_port() {
          var result0, result1, result2, result3, result4;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_DIGIT();
          result0 = result0 !== null ? result0 : "";
  
          if (result0 !== null) {
            result1 = parse_DIGIT();
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result2 = parse_DIGIT();
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result3 = parse_DIGIT();
                result3 = result3 !== null ? result3 : "";
  
                if (result3 !== null) {
                  result4 = parse_DIGIT();
                  result4 = result4 !== null ? result4 : "";
  
                  if (result4 !== null) {
                    result0 = [result0, result1, result2, result3, result4];
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, via_sent_by_port) {
              data.port = parseInt(via_sent_by_port.join(''));
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_ttl() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_DIGIT();
  
          if (result0 !== null) {
            result1 = parse_DIGIT();
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result2 = parse_DIGIT();
              result2 = result2 !== null ? result2 : "";
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, ttl) {
              return parseInt(ttl.join(''));
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_WWW_Authenticate() {
          var result0;
          result0 = parse_challenge();
          return result0;
        }
  
        function parse_Session_Expires() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_s_e_expires();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_s_e_params();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_s_e_params();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_s_e_expires() {
          var result0;
          var pos0;
          pos0 = pos;
          result0 = parse_delta_seconds();
  
          if (result0 !== null) {
            result0 = function (offset, expires) {
              data.expires = expires;
            }(pos0, result0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_s_e_params() {
          var result0;
          result0 = parse_s_e_refresher();
  
          if (result0 === null) {
            result0 = parse_generic_param();
          }
  
          return result0;
        }
  
        function parse_s_e_refresher() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 9).toLowerCase() === "refresher") {
            result0 = input.substr(pos, 9);
            pos += 9;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"refresher\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              if (input.substr(pos, 3).toLowerCase() === "uac") {
                result2 = input.substr(pos, 3);
                pos += 3;
              } else {
                result2 = null;
  
                if (reportFailures === 0) {
                  matchFailed("\"uac\"");
                }
              }
  
              if (result2 === null) {
                if (input.substr(pos, 3).toLowerCase() === "uas") {
                  result2 = input.substr(pos, 3);
                  pos += 3;
                } else {
                  result2 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"uas\"");
                  }
                }
              }
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, s_e_refresher_value) {
              data.refresher = s_e_refresher_value.toLowerCase();
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_extension_header() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_token();
  
          if (result0 !== null) {
            result1 = parse_HCOLON();
  
            if (result1 !== null) {
              result2 = parse_header_value();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_header_value() {
          var result0, result1;
          result0 = [];
          result1 = parse_TEXT_UTF8char();
  
          if (result1 === null) {
            result1 = parse_UTF8_CONT();
  
            if (result1 === null) {
              result1 = parse_LWS();
            }
          }
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_TEXT_UTF8char();
  
            if (result1 === null) {
              result1 = parse_UTF8_CONT();
  
              if (result1 === null) {
                result1 = parse_LWS();
              }
            }
          }
  
          return result0;
        }
  
        function parse_message_body() {
          var result0, result1;
          result0 = [];
          result1 = parse_OCTET();
  
          while (result1 !== null) {
            result0.push(result1);
            result1 = parse_OCTET();
          }
  
          return result0;
        }
  
        function parse_uuid_URI() {
          var result0, result1;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 5) === "uuid:") {
            result0 = "uuid:";
            pos += 5;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"uuid:\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_uuid();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_uuid() {
          var result0, result1, result2, result3, result4, result5, result6, result7, result8;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_hex8();
  
          if (result0 !== null) {
            if (input.charCodeAt(pos) === 45) {
              result1 = "-";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"-\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_hex4();
  
              if (result2 !== null) {
                if (input.charCodeAt(pos) === 45) {
                  result3 = "-";
                  pos++;
                } else {
                  result3 = null;
  
                  if (reportFailures === 0) {
                    matchFailed("\"-\"");
                  }
                }
  
                if (result3 !== null) {
                  result4 = parse_hex4();
  
                  if (result4 !== null) {
                    if (input.charCodeAt(pos) === 45) {
                      result5 = "-";
                      pos++;
                    } else {
                      result5 = null;
  
                      if (reportFailures === 0) {
                        matchFailed("\"-\"");
                      }
                    }
  
                    if (result5 !== null) {
                      result6 = parse_hex4();
  
                      if (result6 !== null) {
                        if (input.charCodeAt(pos) === 45) {
                          result7 = "-";
                          pos++;
                        } else {
                          result7 = null;
  
                          if (reportFailures === 0) {
                            matchFailed("\"-\"");
                          }
                        }
  
                        if (result7 !== null) {
                          result8 = parse_hex12();
  
                          if (result8 !== null) {
                            result0 = [result0, result1, result2, result3, result4, result5, result6, result7, result8];
                          } else {
                            result0 = null;
                            pos = pos1;
                          }
                        } else {
                          result0 = null;
                          pos = pos1;
                        }
                      } else {
                        result0 = null;
                        pos = pos1;
                      }
                    } else {
                      result0 = null;
                      pos = pos1;
                    }
                  } else {
                    result0 = null;
                    pos = pos1;
                  }
                } else {
                  result0 = null;
                  pos = pos1;
                }
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, uuid) {
              data = input.substring(pos + 5, offset);
            }(pos0, result0[0]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_hex4() {
          var result0, result1, result2, result3;
          var pos0;
          pos0 = pos;
          result0 = parse_HEXDIG();
  
          if (result0 !== null) {
            result1 = parse_HEXDIG();
  
            if (result1 !== null) {
              result2 = parse_HEXDIG();
  
              if (result2 !== null) {
                result3 = parse_HEXDIG();
  
                if (result3 !== null) {
                  result0 = [result0, result1, result2, result3];
                } else {
                  result0 = null;
                  pos = pos0;
                }
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_hex8() {
          var result0, result1;
          var pos0;
          pos0 = pos;
          result0 = parse_hex4();
  
          if (result0 !== null) {
            result1 = parse_hex4();
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_hex12() {
          var result0, result1, result2;
          var pos0;
          pos0 = pos;
          result0 = parse_hex4();
  
          if (result0 !== null) {
            result1 = parse_hex4();
  
            if (result1 !== null) {
              result2 = parse_hex4();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos0;
              }
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Refer_To() {
          var result0, result1, result2, result3;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_SIP_URI_noparams();
  
          if (result0 === null) {
            result0 = parse_name_addr();
          }
  
          if (result0 !== null) {
            result1 = [];
            pos2 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_generic_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos2;
              }
            } else {
              result2 = null;
              pos = pos2;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos2 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_generic_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos2;
                }
              } else {
                result2 = null;
                pos = pos2;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              try {
                data = new NameAddrHeader(data.uri, data.display_name, data.params);
              } catch (e) {
                data = -1;
              }
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_Replaces() {
          var result0, result1, result2, result3;
          var pos0, pos1;
          pos0 = pos;
          result0 = parse_call_id();
  
          if (result0 !== null) {
            result1 = [];
            pos1 = pos;
            result2 = parse_SEMI();
  
            if (result2 !== null) {
              result3 = parse_replaces_param();
  
              if (result3 !== null) {
                result2 = [result2, result3];
              } else {
                result2 = null;
                pos = pos1;
              }
            } else {
              result2 = null;
              pos = pos1;
            }
  
            while (result2 !== null) {
              result1.push(result2);
              pos1 = pos;
              result2 = parse_SEMI();
  
              if (result2 !== null) {
                result3 = parse_replaces_param();
  
                if (result3 !== null) {
                  result2 = [result2, result3];
                } else {
                  result2 = null;
                  pos = pos1;
                }
              } else {
                result2 = null;
                pos = pos1;
              }
            }
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos0;
            }
          } else {
            result0 = null;
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_call_id() {
          var result0, result1, result2;
          var pos0, pos1, pos2;
          pos0 = pos;
          pos1 = pos;
          result0 = parse_word();
  
          if (result0 !== null) {
            pos2 = pos;
  
            if (input.charCodeAt(pos) === 64) {
              result1 = "@";
              pos++;
            } else {
              result1 = null;
  
              if (reportFailures === 0) {
                matchFailed("\"@\"");
              }
            }
  
            if (result1 !== null) {
              result2 = parse_word();
  
              if (result2 !== null) {
                result1 = [result1, result2];
              } else {
                result1 = null;
                pos = pos2;
              }
            } else {
              result1 = null;
              pos = pos2;
            }
  
            result1 = result1 !== null ? result1 : "";
  
            if (result1 !== null) {
              result0 = [result0, result1];
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.call_id = input.substring(pos, offset);
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_replaces_param() {
          var result0;
          result0 = parse_to_tag();
  
          if (result0 === null) {
            result0 = parse_from_tag();
  
            if (result0 === null) {
              result0 = parse_early_flag();
  
              if (result0 === null) {
                result0 = parse_generic_param();
              }
            }
          }
  
          return result0;
        }
  
        function parse_to_tag() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 6) === "to-tag") {
            result0 = "to-tag";
            pos += 6;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"to-tag\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_token();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, to_tag) {
              data.to_tag = to_tag;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_from_tag() {
          var result0, result1, result2;
          var pos0, pos1;
          pos0 = pos;
          pos1 = pos;
  
          if (input.substr(pos, 8) === "from-tag") {
            result0 = "from-tag";
            pos += 8;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"from-tag\"");
            }
          }
  
          if (result0 !== null) {
            result1 = parse_EQUAL();
  
            if (result1 !== null) {
              result2 = parse_token();
  
              if (result2 !== null) {
                result0 = [result0, result1, result2];
              } else {
                result0 = null;
                pos = pos1;
              }
            } else {
              result0 = null;
              pos = pos1;
            }
          } else {
            result0 = null;
            pos = pos1;
          }
  
          if (result0 !== null) {
            result0 = function (offset, from_tag) {
              data.from_tag = from_tag;
            }(pos0, result0[2]);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function parse_early_flag() {
          var result0;
          var pos0;
          pos0 = pos;
  
          if (input.substr(pos, 10) === "early-only") {
            result0 = "early-only";
            pos += 10;
          } else {
            result0 = null;
  
            if (reportFailures === 0) {
              matchFailed("\"early-only\"");
            }
          }
  
          if (result0 !== null) {
            result0 = function (offset) {
              data.early_only = true;
            }(pos0);
          }
  
          if (result0 === null) {
            pos = pos0;
          }
  
          return result0;
        }
  
        function cleanupExpected(expected) {
          expected.sort();
          var lastExpected = null;
          var cleanExpected = [];
  
          for (var i = 0; i < expected.length; i++) {
            if (expected[i] !== lastExpected) {
              cleanExpected.push(expected[i]);
              lastExpected = expected[i];
            }
          }
  
          return cleanExpected;
        }
  
        function computeErrorPosition() {
          /*
           * The first idea was to use |String.split| to break the input up to the
           * error position along newlines and derive the line and column from
           * there. However IE's |split| implementation is so broken that it was
           * enough to prevent it.
           */
          var line = 1;
          var column = 1;
          var seenCR = false;
  
          for (var i = 0; i < Math.max(pos, rightmostFailuresPos); i++) {
            var ch = input.charAt(i);
  
            if (ch === "\n") {
              if (!seenCR) {
                line++;
              }
  
              column = 1;
              seenCR = false;
            } else if (ch === "\r" || ch === "\u2028" || ch === "\u2029") {
              line++;
              column = 1;
              seenCR = true;
            } else {
              column++;
              seenCR = false;
            }
          }
  
          return {
            line: line,
            column: column
          };
        }
  
        var URI = require('./URI');
  
        var NameAddrHeader = require('./NameAddrHeader');
  
        var data = {};
        var result = parseFunctions[startRule]();
        /*
         * The parser is now in one of the following three states:
         *
         * 1. The parser successfully parsed the whole input.
         *
         *    - |result !== null|
         *    - |pos === input.length|
         *    - |rightmostFailuresExpected| may or may not contain something
         *
         * 2. The parser successfully parsed only a part of the input.
         *
         *    - |result !== null|
         *    - |pos < input.length|
         *    - |rightmostFailuresExpected| may or may not contain something
         *
         * 3. The parser did not successfully parse any part of the input.
         *
         *   - |result === null|
         *   - |pos === 0|
         *   - |rightmostFailuresExpected| contains at least one failure
         *
         * All code following this comment (including called functions) must
         * handle these states.
         */
  
        if (result === null || pos !== input.length) {
          var offset = Math.max(pos, rightmostFailuresPos);
          var found = offset < input.length ? input.charAt(offset) : null;
          var errorPosition = computeErrorPosition();
          new this.SyntaxError(cleanupExpected(rightmostFailuresExpected), found, offset, errorPosition.line, errorPosition.column);
          return -1;
        }
  
        return data;
      },
  
      /* Returns the parser source code. */
      toSource: function toSource() {
        return this._source;
      }
    };
    /* Thrown when a parser encounters a syntax error. */
  
    result.SyntaxError = function (expected, found, offset, line, column) {
      function buildMessage(expected, found) {
        var expectedHumanized, foundHumanized;
  
        switch (expected.length) {
          case 0:
            expectedHumanized = "end of input";
            break;
  
          case 1:
            expectedHumanized = expected[0];
            break;
  
          default:
            expectedHumanized = expected.slice(0, expected.length - 1).join(", ") + " or " + expected[expected.length - 1];
        }
  
        foundHumanized = found ? quote(found) : "end of input";
        return "Expected " + expectedHumanized + " but " + foundHumanized + " found.";
      }
  
      this.name = "SyntaxError";
      this.expected = expected;
      this.found = found;
      this.message = buildMessage(expected, found);
      this.offset = offset;
      this.line = line;
      this.column = column;
    };
  
    result.SyntaxError.prototype = Error.prototype;
    return result;
  }();
  },{"./NameAddrHeader":10,"./URI":25}],8:[function(require,module,exports){
  "use strict";
  
  var pkg = require('../package.json');
  
  var C = require('./Constants');
  
  var Exceptions = require('./Exceptions');
  
  var Utils = require('./Utils');
  
  var UA = require('./UA');
  
  var URI = require('./URI');
  
  var NameAddrHeader = require('./NameAddrHeader');
  
  var Grammar = require('./Grammar');
  
  var WebSocketInterface = require('./WebSocketInterface');
  
  var debug = require('debug')('JsSIP');
  
  debug('version %s', pkg.version);
  /**
   * Expose the JsSIP module.
   */
  
  module.exports = {
    C: C,
    Exceptions: Exceptions,
    Utils: Utils,
    UA: UA,
    URI: URI,
    NameAddrHeader: NameAddrHeader,
    WebSocketInterface: WebSocketInterface,
    Grammar: Grammar,
    // Expose the debug module.
    debug: require('debug'),
  
    get name() {
      return pkg.title;
    },
  
    get version() {
      return pkg.version;
    }
  
  };
  },{"../package.json":38,"./Constants":2,"./Exceptions":6,"./Grammar":7,"./NameAddrHeader":10,"./UA":24,"./URI":25,"./Utils":26,"./WebSocketInterface":27,"debug":30}],9:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  var EventEmitter = require('events').EventEmitter;
  
  var JsSIP_C = require('./Constants');
  
  var SIPMessage = require('./SIPMessage');
  
  var Utils = require('./Utils');
  
  var RequestSender = require('./RequestSender');
  
  var Exceptions = require('./Exceptions');
  
  var debug = require('debug')('JsSIP:Message');
  
  module.exports = /*#__PURE__*/function (_EventEmitter) {
    _inherits(Message, _EventEmitter);
  
    var _super = _createSuper(Message);
  
    function Message(ua) {
      var _this;
  
      _classCallCheck(this, Message);
  
      _this = _super.call(this);
      _this._ua = ua;
      _this._request = null;
      _this._closed = false;
      _this._direction = null;
      _this._local_identity = null;
      _this._remote_identity = null; // Whether an incoming message has been replied.
  
      _this._is_replied = false; // Custom message empty object for high level use.
  
      _this._data = {};
      return _this;
    }
  
    _createClass(Message, [{
      key: "send",
      value: function send(target, body) {
        var _this2 = this;
  
        var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
        var originalTarget = target;
  
        if (target === undefined || body === undefined) {
          throw new TypeError('Not enough arguments');
        } // Check target validity.
  
  
        target = this._ua.normalizeTarget(target);
  
        if (!target) {
          throw new TypeError("Invalid target: ".concat(originalTarget));
        } // Get call options.
  
  
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var eventHandlers = options.eventHandlers || {};
        var contentType = options.contentType || 'text/plain'; // Set event handlers.
  
        for (var event in eventHandlers) {
          if (Object.prototype.hasOwnProperty.call(eventHandlers, event)) {
            this.on(event, eventHandlers[event]);
          }
        }
  
        extraHeaders.push("Content-Type: ".concat(contentType));
        this._request = new SIPMessage.OutgoingRequest(JsSIP_C.MESSAGE, target, this._ua, null, extraHeaders);
  
        if (body) {
          this._request.body = body;
        }
  
        var request_sender = new RequestSender(this._ua, this._request, {
          onRequestTimeout: function onRequestTimeout() {
            _this2._onRequestTimeout();
          },
          onTransportError: function onTransportError() {
            _this2._onTransportError();
          },
          onReceiveResponse: function onReceiveResponse(response) {
            _this2._receiveResponse(response);
          }
        });
  
        this._newMessage('local', this._request);
  
        request_sender.send();
      }
    }, {
      key: "init_incoming",
      value: function init_incoming(request) {
        this._request = request;
  
        this._newMessage('remote', request); // Reply with a 200 OK if the user didn't reply.
  
  
        if (!this._is_replied) {
          this._is_replied = true;
          request.reply(200);
        }
  
        this._close();
      }
      /**
       * Accept the incoming Message
       * Only valid for incoming Messages
       */
  
    }, {
      key: "accept",
      value: function accept() {
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var body = options.body;
  
        if (this._direction !== 'incoming') {
          throw new Exceptions.NotSupportedError('"accept" not supported for outgoing Message');
        }
  
        if (this._is_replied) {
          throw new Error('incoming Message already replied');
        }
  
        this._is_replied = true;
  
        this._request.reply(200, null, extraHeaders, body);
      }
      /**
       * Reject the incoming Message
       * Only valid for incoming Messages
       */
  
    }, {
      key: "reject",
      value: function reject() {
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        var status_code = options.status_code || 480;
        var reason_phrase = options.reason_phrase;
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var body = options.body;
  
        if (this._direction !== 'incoming') {
          throw new Exceptions.NotSupportedError('"reject" not supported for outgoing Message');
        }
  
        if (this._is_replied) {
          throw new Error('incoming Message already replied');
        }
  
        if (status_code < 300 || status_code >= 700) {
          throw new TypeError("Invalid status_code: ".concat(status_code));
        }
  
        this._is_replied = true;
  
        this._request.reply(status_code, reason_phrase, extraHeaders, body);
      }
    }, {
      key: "_receiveResponse",
      value: function _receiveResponse(response) {
        if (this._closed) {
          return;
        }
  
        switch (true) {
          case /^1[0-9]{2}$/.test(response.status_code):
            // Ignore provisional responses.
            break;
  
          case /^2[0-9]{2}$/.test(response.status_code):
            this._succeeded('remote', response);
  
            break;
  
          default:
            {
              var cause = Utils.sipErrorCause(response.status_code);
  
              this._failed('remote', response, cause);
  
              break;
            }
        }
      }
    }, {
      key: "_onRequestTimeout",
      value: function _onRequestTimeout() {
        if (this._closed) {
          return;
        }
  
        this._failed('system', null, JsSIP_C.causes.REQUEST_TIMEOUT);
      }
    }, {
      key: "_onTransportError",
      value: function _onTransportError() {
        if (this._closed) {
          return;
        }
  
        this._failed('system', null, JsSIP_C.causes.CONNECTION_ERROR);
      }
    }, {
      key: "_close",
      value: function _close() {
        this._closed = true;
  
        this._ua.destroyMessage(this);
      }
      /**
       * Internal Callbacks
       */
  
    }, {
      key: "_newMessage",
      value: function _newMessage(originator, request) {
        if (originator === 'remote') {
          this._direction = 'incoming';
          this._local_identity = request.to;
          this._remote_identity = request.from;
        } else if (originator === 'local') {
          this._direction = 'outgoing';
          this._local_identity = request.from;
          this._remote_identity = request.to;
        }
  
        this._ua.newMessage(this, {
          originator: originator,
          message: this,
          request: request
        });
      }
    }, {
      key: "_failed",
      value: function _failed(originator, response, cause) {
        debug('MESSAGE failed');
  
        this._close();
  
        debug('emit "failed"');
        this.emit('failed', {
          originator: originator,
          response: response || null,
          cause: cause
        });
      }
    }, {
      key: "_succeeded",
      value: function _succeeded(originator, response) {
        debug('MESSAGE succeeded');
  
        this._close();
  
        debug('emit "succeeded"');
        this.emit('succeeded', {
          originator: originator,
          response: response
        });
      }
    }, {
      key: "direction",
      get: function get() {
        return this._direction;
      }
    }, {
      key: "local_identity",
      get: function get() {
        return this._local_identity;
      }
    }, {
      key: "remote_identity",
      get: function get() {
        return this._remote_identity;
      }
    }]);
  
    return Message;
  }(EventEmitter);
  },{"./Constants":2,"./Exceptions":6,"./RequestSender":18,"./SIPMessage":19,"./Utils":26,"debug":30,"events":29}],10:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var URI = require('./URI');
  
  var Grammar = require('./Grammar');
  
  module.exports = /*#__PURE__*/function () {
    _createClass(NameAddrHeader, null, [{
      key: "parse",
  
      /**
       * Parse the given string and returns a NameAddrHeader instance or undefined if
       * it is an invalid NameAddrHeader.
       */
      value: function parse(name_addr_header) {
        name_addr_header = Grammar.parse(name_addr_header, 'Name_Addr_Header');
  
        if (name_addr_header !== -1) {
          return name_addr_header;
        } else {
          return undefined;
        }
      }
    }]);
  
    function NameAddrHeader(uri, display_name, parameters) {
      _classCallCheck(this, NameAddrHeader);
  
      // Checks.
      if (!uri || !(uri instanceof URI)) {
        throw new TypeError('missing or invalid "uri" parameter');
      } // Initialize parameters.
  
  
      this._uri = uri;
      this._parameters = {};
      this.display_name = display_name;
  
      for (var param in parameters) {
        if (Object.prototype.hasOwnProperty.call(parameters, param)) {
          this.setParam(param, parameters[param]);
        }
      }
    }
  
    _createClass(NameAddrHeader, [{
      key: "setParam",
      value: function setParam(key, value) {
        if (key) {
          this._parameters[key.toLowerCase()] = typeof value === 'undefined' || value === null ? null : value.toString();
        }
      }
    }, {
      key: "getParam",
      value: function getParam(key) {
        if (key) {
          return this._parameters[key.toLowerCase()];
        }
      }
    }, {
      key: "hasParam",
      value: function hasParam(key) {
        if (key) {
          return this._parameters.hasOwnProperty(key.toLowerCase()) && true || false;
        }
      }
    }, {
      key: "deleteParam",
      value: function deleteParam(parameter) {
        parameter = parameter.toLowerCase();
  
        if (this._parameters.hasOwnProperty(parameter)) {
          var value = this._parameters[parameter];
          delete this._parameters[parameter];
          return value;
        }
      }
    }, {
      key: "clearParams",
      value: function clearParams() {
        this._parameters = {};
      }
    }, {
      key: "clone",
      value: function clone() {
        return new NameAddrHeader(this._uri.clone(), this._display_name, JSON.parse(JSON.stringify(this._parameters)));
      }
    }, {
      key: "_quote",
      value: function _quote(str) {
        return str.replace(/\\/g, '\\\\').replace(/"/g, '\\"');
      }
    }, {
      key: "toString",
      value: function toString() {
        var body = this._display_name ? "\"".concat(this._quote(this._display_name), "\" ") : '';
        body += "<".concat(this._uri.toString(), ">");
  
        for (var parameter in this._parameters) {
          if (Object.prototype.hasOwnProperty.call(this._parameters, parameter)) {
            body += ";".concat(parameter);
  
            if (this._parameters[parameter] !== null) {
              body += "=".concat(this._parameters[parameter]);
            }
          }
        }
  
        return body;
      }
    }, {
      key: "uri",
      get: function get() {
        return this._uri;
      }
    }, {
      key: "display_name",
      get: function get() {
        return this._display_name;
      },
      set: function set(value) {
        this._display_name = value === 0 ? '0' : value;
      }
    }]);
  
    return NameAddrHeader;
  }();
  },{"./Grammar":7,"./URI":25}],11:[function(require,module,exports){
  "use strict";
  
  function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var it, normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
  
  var Grammar = require('./Grammar');
  
  var SIPMessage = require('./SIPMessage');
  
  var debugerror = require('debug')('JsSIP:ERROR:Parser');
  
  debugerror.log = console.warn.bind(console);
  /**
   * Parse SIP Message
   */
  
  exports.parseMessage = function (data, ua) {
    var message;
    var bodyStart;
    var headerEnd = data.indexOf('\r\n');
  
    if (headerEnd === -1) {
      debugerror('parseMessage() | no CRLF found, not a SIP message');
      return;
    } // Parse first line. Check if it is a Request or a Reply.
  
  
    var firstLine = data.substring(0, headerEnd);
    var parsed = Grammar.parse(firstLine, 'Request_Response');
  
    if (parsed === -1) {
      debugerror("parseMessage() | error parsing first line of SIP message: \"".concat(firstLine, "\""));
      return;
    } else if (!parsed.status_code) {
      message = new SIPMessage.IncomingRequest(ua);
      message.method = parsed.method;
      message.ruri = parsed.uri;
    } else {
      message = new SIPMessage.IncomingResponse();
      message.status_code = parsed.status_code;
      message.reason_phrase = parsed.reason_phrase;
    }
  
    message.data = data;
    var headerStart = headerEnd + 2;
    /* Loop over every line in data. Detect the end of each header and parse
    * it or simply add to the headers collection.
    */
  
    while (true) {
      headerEnd = getHeader(data, headerStart); // The SIP message has normally finished.
  
      if (headerEnd === -2) {
        bodyStart = headerStart + 2;
        break;
      } // Data.indexOf returned -1 due to a malformed message.
      else if (headerEnd === -1) {
          debugerror('parseMessage() | malformed message');
          return;
        }
  
      parsed = parseHeader(message, data, headerStart, headerEnd);
  
      if (parsed !== true) {
        debugerror('parseMessage() |', parsed.error);
        return;
      }
  
      headerStart = headerEnd + 2;
    }
    /* RFC3261 18.3.
     * If there are additional bytes in the transport packet
     * beyond the end of the body, they MUST be discarded.
     */
  
  
    if (message.hasHeader('content-length')) {
      var contentLength = message.getHeader('content-length');
      message.body = data.substr(bodyStart, contentLength);
    } else {
      message.body = data.substring(bodyStart);
    }
  
    return message;
  };
  /**
   * Extract and parse every header of a SIP message.
   */
  
  
  function getHeader(data, headerStart) {
    // 'start' position of the header.
    var start = headerStart; // 'end' position of the header.
  
    var end = 0; // 'partial end' position of the header.
  
    var partialEnd = 0; // End of message.
  
    if (data.substring(start, start + 2).match(/(^\r\n)/)) {
      return -2;
    }
  
    while (end === 0) {
      // Partial End of Header.
      partialEnd = data.indexOf('\r\n', start); // 'indexOf' returns -1 if the value to be found never occurs.
  
      if (partialEnd === -1) {
        return partialEnd;
      }
  
      if (!data.substring(partialEnd + 2, partialEnd + 4).match(/(^\r\n)/) && data.charAt(partialEnd + 2).match(/(^\s+)/)) {
        // Not the end of the message. Continue from the next position.
        start = partialEnd + 2;
      } else {
        end = partialEnd;
      }
    }
  
    return end;
  }
  
  function parseHeader(message, data, headerStart, headerEnd) {
    var parsed;
    var hcolonIndex = data.indexOf(':', headerStart);
    var headerName = data.substring(headerStart, hcolonIndex).trim();
    var headerValue = data.substring(hcolonIndex + 1, headerEnd).trim(); // If header-field is well-known, parse it.
  
    switch (headerName.toLowerCase()) {
      case 'via':
      case 'v':
        message.addHeader('via', headerValue);
  
        if (message.getHeaders('via').length === 1) {
          parsed = message.parseHeader('Via');
  
          if (parsed) {
            message.via = parsed;
            message.via_branch = parsed.branch;
          }
        } else {
          parsed = 0;
        }
  
        break;
  
      case 'from':
      case 'f':
        message.setHeader('from', headerValue);
        parsed = message.parseHeader('from');
  
        if (parsed) {
          message.from = parsed;
          message.from_tag = parsed.getParam('tag');
        }
  
        break;
  
      case 'to':
      case 't':
        message.setHeader('to', headerValue);
        parsed = message.parseHeader('to');
  
        if (parsed) {
          message.to = parsed;
          message.to_tag = parsed.getParam('tag');
        }
  
        break;
  
      case 'record-route':
        parsed = Grammar.parse(headerValue, 'Record_Route');
  
        if (parsed === -1) {
          parsed = undefined;
        } else {
          var _iterator = _createForOfIteratorHelper(parsed),
              _step;
  
          try {
            for (_iterator.s(); !(_step = _iterator.n()).done;) {
              var header = _step.value;
              message.addHeader('record-route', headerValue.substring(header.possition, header.offset));
              message.headers['Record-Route'][message.getHeaders('record-route').length - 1].parsed = header.parsed;
            }
          } catch (err) {
            _iterator.e(err);
          } finally {
            _iterator.f();
          }
        }
  
        break;
  
      case 'call-id':
      case 'i':
        message.setHeader('call-id', headerValue);
        parsed = message.parseHeader('call-id');
  
        if (parsed) {
          message.call_id = headerValue;
        }
  
        break;
  
      case 'contact':
      case 'm':
        parsed = Grammar.parse(headerValue, 'Contact');
  
        if (parsed === -1) {
          parsed = undefined;
        } else {
          var _iterator2 = _createForOfIteratorHelper(parsed),
              _step2;
  
          try {
            for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
              var _header = _step2.value;
              message.addHeader('contact', headerValue.substring(_header.possition, _header.offset));
              message.headers.Contact[message.getHeaders('contact').length - 1].parsed = _header.parsed;
            }
          } catch (err) {
            _iterator2.e(err);
          } finally {
            _iterator2.f();
          }
        }
  
        break;
  
      case 'content-length':
      case 'l':
        message.setHeader('content-length', headerValue);
        parsed = message.parseHeader('content-length');
        break;
  
      case 'content-type':
      case 'c':
        message.setHeader('content-type', headerValue);
        parsed = message.parseHeader('content-type');
        break;
  
      case 'cseq':
        message.setHeader('cseq', headerValue);
        parsed = message.parseHeader('cseq');
  
        if (parsed) {
          message.cseq = parsed.value;
        }
  
        if (message instanceof SIPMessage.IncomingResponse) {
          message.method = parsed.method;
        }
  
        break;
  
      case 'max-forwards':
        message.setHeader('max-forwards', headerValue);
        parsed = message.parseHeader('max-forwards');
        break;
  
      case 'www-authenticate':
        message.setHeader('www-authenticate', headerValue);
        parsed = message.parseHeader('www-authenticate');
        break;
  
      case 'proxy-authenticate':
        message.setHeader('proxy-authenticate', headerValue);
        parsed = message.parseHeader('proxy-authenticate');
        break;
  
      case 'session-expires':
      case 'x':
        message.setHeader('session-expires', headerValue);
        parsed = message.parseHeader('session-expires');
  
        if (parsed) {
          message.session_expires = parsed.expires;
          message.session_expires_refresher = parsed.refresher;
        }
  
        break;
  
      case 'refer-to':
      case 'r':
        message.setHeader('refer-to', headerValue);
        parsed = message.parseHeader('refer-to');
  
        if (parsed) {
          message.refer_to = parsed;
        }
  
        break;
  
      case 'replaces':
        message.setHeader('replaces', headerValue);
        parsed = message.parseHeader('replaces');
  
        if (parsed) {
          message.replaces = parsed;
        }
  
        break;
  
      case 'event':
      case 'o':
        message.setHeader('event', headerValue);
        parsed = message.parseHeader('event');
  
        if (parsed) {
          message.event = parsed;
        }
  
        break;
  
      default:
        // Do not parse this header.
        message.addHeader(headerName, headerValue);
        parsed = 0;
    }
  
    if (parsed === undefined) {
      return {
        error: "error parsing header \"".concat(headerName, "\"")
      };
    } else {
      return true;
    }
  }
  },{"./Grammar":7,"./SIPMessage":19,"debug":30}],12:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e2) { throw _e2; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var it, normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e3) { didErr = true; err = _e3; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  /* globals RTCPeerConnection: false, RTCSessionDescription: false */
  var EventEmitter = require('events').EventEmitter;
  
  var sdp_transform = require('sdp-transform');
  
  var JsSIP_C = require('./Constants');
  
  var Exceptions = require('./Exceptions');
  
  var Transactions = require('./Transactions');
  
  var Utils = require('./Utils');
  
  var Timers = require('./Timers');
  
  var SIPMessage = require('./SIPMessage');
  
  var Dialog = require('./Dialog');
  
  var RequestSender = require('./RequestSender');
  
  var RTCSession_DTMF = require('./RTCSession/DTMF');
  
  var RTCSession_Info = require('./RTCSession/Info');
  
  var RTCSession_ReferNotifier = require('./RTCSession/ReferNotifier');
  
  var RTCSession_ReferSubscriber = require('./RTCSession/ReferSubscriber');
  
  var URI = require('./URI');
  
  var debug = require('debug')('JsSIP:RTCSession');
  
  var debugerror = require('debug')('JsSIP:ERROR:RTCSession');
  
  debugerror.log = console.warn.bind(console);
  var C = {
    // RTCSession states.
    STATUS_NULL: 0,
    STATUS_INVITE_SENT: 1,
    STATUS_1XX_RECEIVED: 2,
    STATUS_INVITE_RECEIVED: 3,
    STATUS_WAITING_FOR_ANSWER: 4,
    STATUS_ANSWERED: 5,
    STATUS_WAITING_FOR_ACK: 6,
    STATUS_CANCELED: 7,
    STATUS_TERMINATED: 8,
    STATUS_CONFIRMED: 9
  };
  /**
   * Local variables.
   */
  
  var holdMediaTypes = ['audio', 'video'];
  
  module.exports = /*#__PURE__*/function (_EventEmitter) {
    _inherits(RTCSession, _EventEmitter);
  
    var _super = _createSuper(RTCSession);
  
    _createClass(RTCSession, null, [{
      key: "C",
  
      /**
       * Expose C object.
       */
      get: function get() {
        return C;
      }
    }]);
  
    function RTCSession(ua) {
      var _this;
  
      _classCallCheck(this, RTCSession);
  
      debug('new');
      _this = _super.call(this);
      _this._id = null;
      _this._ua = ua;
      _this._status = C.STATUS_NULL;
      _this._dialog = null;
      _this._earlyDialogs = {};
      _this._contact = null;
      _this._from_tag = null;
      _this._to_tag = null; // The RTCPeerConnection instance (public attribute).
  
      _this._connection = null; // Prevent races on serial PeerConnction operations.
  
      _this._connectionPromiseQueue = Promise.resolve(); // Incoming/Outgoing request being currently processed.
  
      _this._request = null; // Cancel state for initial outgoing request.
  
      _this._is_canceled = false;
      _this._cancel_reason = ''; // RTCSession confirmation flag.
  
      _this._is_confirmed = false; // Is late SDP being negotiated.
  
      _this._late_sdp = false; // Default rtcOfferConstraints and rtcAnswerConstrainsts (passed in connect() or answer()).
  
      _this._rtcOfferConstraints = null;
      _this._rtcAnswerConstraints = null; // Local MediaStream.
  
      _this._localMediaStream = null;
      _this._localMediaStreamLocallyGenerated = false; // Flag to indicate PeerConnection ready for new actions.
  
      _this._rtcReady = true; // SIP Timers.
  
      _this._timers = {
        ackTimer: null,
        expiresTimer: null,
        invite2xxTimer: null,
        userNoAnswerTimer: null
      }; // Session info.
  
      _this._direction = null;
      _this._local_identity = null;
      _this._remote_identity = null;
      _this._start_time = null;
      _this._end_time = null;
      _this._tones = null; // Mute/Hold state.
  
      _this._audioMuted = false;
      _this._videoMuted = false;
      _this._localHold = false;
      _this._remoteHold = false; // Session Timers (RFC 4028).
  
      _this._sessionTimers = {
        enabled: _this._ua.configuration.session_timers,
        refreshMethod: _this._ua.configuration.session_timers_refresh_method,
        defaultExpires: JsSIP_C.SESSION_EXPIRES,
        currentExpires: null,
        running: false,
        refresher: false,
        timer: null // A setTimeout.
  
      }; // Map of ReferSubscriber instances indexed by the REFER's CSeq number.
  
      _this._referSubscribers = {}; // Custom session empty object for high level use.
  
      _this._data = {};
      return _this;
    }
    /**
     * User API
     */
    // Expose RTCSession constants as a property of the RTCSession instance.
  
  
    _createClass(RTCSession, [{
      key: "isInProgress",
      value: function isInProgress() {
        switch (this._status) {
          case C.STATUS_NULL:
          case C.STATUS_INVITE_SENT:
          case C.STATUS_1XX_RECEIVED:
          case C.STATUS_INVITE_RECEIVED:
          case C.STATUS_WAITING_FOR_ANSWER:
            return true;
  
          default:
            return false;
        }
      }
    }, {
      key: "isEstablished",
      value: function isEstablished() {
        switch (this._status) {
          case C.STATUS_ANSWERED:
          case C.STATUS_WAITING_FOR_ACK:
          case C.STATUS_CONFIRMED:
            return true;
  
          default:
            return false;
        }
      }
    }, {
      key: "isEnded",
      value: function isEnded() {
        switch (this._status) {
          case C.STATUS_CANCELED:
          case C.STATUS_TERMINATED:
            return true;
  
          default:
            return false;
        }
      }
    }, {
      key: "isMuted",
      value: function isMuted() {
        return {
          audio: this._audioMuted,
          video: this._videoMuted
        };
      }
    }, {
      key: "isOnHold",
      value: function isOnHold() {
        return {
          local: this._localHold,
          remote: this._remoteHold
        };
      }
    }, {
      key: "connect",
      value: function connect(target) {
        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
        var initCallback = arguments.length > 2 ? arguments[2] : undefined;
        debug('connect()');
        var originalTarget = target;
        var eventHandlers = options.eventHandlers || {};
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var mediaConstraints = options.mediaConstraints || {
          audio: true,
          video: true
        };
        var mediaStream = options.mediaStream || null;
        var pcConfig = options.pcConfig || {
          iceServers: []
        };
        var rtcConstraints = options.rtcConstraints || null;
        var rtcOfferConstraints = options.rtcOfferConstraints || null;
        this._rtcOfferConstraints = rtcOfferConstraints;
        this._rtcAnswerConstraints = options.rtcAnswerConstraints || null;
        this._data = options.data || this._data; // Check target.
  
        if (target === undefined) {
          throw new TypeError('Not enough arguments');
        } // Check Session Status.
  
  
        if (this._status !== C.STATUS_NULL) {
          throw new Exceptions.InvalidStateError(this._status);
        } // Check WebRTC support.
  
  
        if (!window.RTCPeerConnection) {
          throw new Exceptions.NotSupportedError('WebRTC not supported');
        } // Check target validity.
  
  
        target = this._ua.normalizeTarget(target);
  
        if (!target) {
          throw new TypeError("Invalid target: ".concat(originalTarget));
        } // Session Timers.
  
  
        if (this._sessionTimers.enabled) {
          if (Utils.isDecimal(options.sessionTimersExpires)) {
            if (options.sessionTimersExpires >= JsSIP_C.MIN_SESSION_EXPIRES) {
              this._sessionTimers.defaultExpires = options.sessionTimersExpires;
            } else {
              this._sessionTimers.defaultExpires = JsSIP_C.SESSION_EXPIRES;
            }
          }
        } // Set event handlers.
  
  
        for (var event in eventHandlers) {
          if (Object.prototype.hasOwnProperty.call(eventHandlers, event)) {
            this.on(event, eventHandlers[event]);
          }
        } // Session parameter initialization.
  
  
        this._from_tag = Utils.newTag(); // Set anonymous property.
  
        var anonymous = options.anonymous || false;
        var requestParams = {
          from_tag: this._from_tag
        };
        this._contact = this._ua.contact.toString({
          anonymous: anonymous,
          outbound: true
        });
  
        if (anonymous) {
          requestParams.from_display_name = 'Anonymous';
          requestParams.from_uri = new URI('sip', 'anonymous', 'anonymous.invalid');
          extraHeaders.push("P-Preferred-Identity: ".concat(this._ua.configuration.uri.toString()));
          extraHeaders.push('Privacy: id');
        }
  
        extraHeaders.push("Contact: ".concat(this._contact));
        extraHeaders.push('Content-Type: application/sdp');
  
        if (this._sessionTimers.enabled) {
          extraHeaders.push("Session-Expires: ".concat(this._sessionTimers.defaultExpires));
        }
  
        this._request = new SIPMessage.InitialOutgoingInviteRequest(target, this._ua, requestParams, extraHeaders);
        this._id = this._request.call_id + this._from_tag; // Create a new RTCPeerConnection instance.
  
        this._createRTCConnection(pcConfig, rtcConstraints); // Set internal properties.
  
  
        this._direction = 'outgoing';
        this._local_identity = this._request.from;
        this._remote_identity = this._request.to; // User explicitly provided a newRTCSession callback for this session.
  
        if (initCallback) {
          initCallback(this);
        }
  
        this._newRTCSession('local', this._request);
  
        this._sendInitialRequest(mediaConstraints, rtcOfferConstraints, mediaStream);
      }
    }, {
      key: "init_incoming",
      value: function init_incoming(request, initCallback) {
        var _this2 = this;
  
        debug('init_incoming()');
        var expires;
        var contentType = request.getHeader('Content-Type'); // Check body and content type.
  
        if (request.body && contentType !== 'application/sdp') {
          request.reply(415);
          return;
        } // Session parameter initialization.
  
  
        this._status = C.STATUS_INVITE_RECEIVED;
        this._from_tag = request.from_tag;
        this._id = request.call_id + this._from_tag;
        this._request = request;
        this._contact = this._ua.contact.toString(); // Get the Expires header value if exists.
  
        if (request.hasHeader('expires')) {
          expires = request.getHeader('expires') * 1000;
        }
        /* Set the to_tag before
         * replying a response code that will create a dialog.
         */
  
  
        request.to_tag = Utils.newTag(); // An error on dialog creation will fire 'failed' event.
  
        if (!this._createDialog(request, 'UAS', true)) {
          request.reply(500, 'Missing Contact header field');
          return;
        }
  
        if (request.body) {
          this._late_sdp = false;
        } else {
          this._late_sdp = true;
        }
  
        this._status = C.STATUS_WAITING_FOR_ANSWER; // Set userNoAnswerTimer.
  
        this._timers.userNoAnswerTimer = setTimeout(function () {
          request.reply(408);
  
          _this2._failed('local', null, JsSIP_C.causes.NO_ANSWER);
        }, this._ua.configuration.no_answer_timeout);
        /* Set expiresTimer
         * RFC3261 13.3.1
         */
  
        if (expires) {
          this._timers.expiresTimer = setTimeout(function () {
            if (_this2._status === C.STATUS_WAITING_FOR_ANSWER) {
              request.reply(487);
  
              _this2._failed('system', null, JsSIP_C.causes.EXPIRES);
            }
          }, expires);
        } // Set internal properties.
  
  
        this._direction = 'incoming';
        this._local_identity = request.to;
        this._remote_identity = request.from; // A init callback was specifically defined.
  
        if (initCallback) {
          initCallback(this);
        } // Fire 'newRTCSession' event.
  
  
        this._newRTCSession('remote', request); // The user may have rejected the call in the 'newRTCSession' event.
  
  
        if (this._status === C.STATUS_TERMINATED) {
          return;
        } // Reply 180.
  
  
        request.reply(180, null, ["Contact: ".concat(this._contact)]); // Fire 'progress' event.
        // TODO: Document that 'response' field in 'progress' event is null for incoming calls.
  
        this._progress('local', null);
      }
      /**
       * Answer the call.
       */
  
    }, {
      key: "answer",
      value: function answer() {
        var _this3 = this;
  
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        debug('answer()');
        var request = this._request;
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var mediaConstraints = options.mediaConstraints || {};
        var mediaStream = options.mediaStream || null;
        var pcConfig = options.pcConfig || {
          iceServers: []
        };
        var rtcConstraints = options.rtcConstraints || null;
        var rtcAnswerConstraints = options.rtcAnswerConstraints || null;
        var tracks;
        var peerHasAudioLine = false;
        var peerHasVideoLine = false;
        var peerOffersFullAudio = false;
        var peerOffersFullVideo = false;
        this._rtcAnswerConstraints = rtcAnswerConstraints;
        this._rtcOfferConstraints = options.rtcOfferConstraints || null;
        this._data = options.data || this._data; // Check Session Direction and Status.
  
        if (this._direction !== 'incoming') {
          throw new Exceptions.NotSupportedError('"answer" not supported for outgoing RTCSession');
        } // Check Session status.
  
  
        if (this._status !== C.STATUS_WAITING_FOR_ANSWER) {
          throw new Exceptions.InvalidStateError(this._status);
        } // Session Timers.
  
  
        if (this._sessionTimers.enabled) {
          if (Utils.isDecimal(options.sessionTimersExpires)) {
            if (options.sessionTimersExpires >= JsSIP_C.MIN_SESSION_EXPIRES) {
              this._sessionTimers.defaultExpires = options.sessionTimersExpires;
            } else {
              this._sessionTimers.defaultExpires = JsSIP_C.SESSION_EXPIRES;
            }
          }
        }
  
        this._status = C.STATUS_ANSWERED; // An error on dialog creation will fire 'failed' event.
  
        if (!this._createDialog(request, 'UAS')) {
          request.reply(500, 'Error creating dialog');
          return;
        }
  
        clearTimeout(this._timers.userNoAnswerTimer);
        extraHeaders.unshift("Contact: ".concat(this._contact)); // Determine incoming media from incoming SDP offer (if any).
  
        var sdp = request.parseSDP(); // Make sure sdp.media is an array, not the case if there is only one media.
  
        if (!Array.isArray(sdp.media)) {
          sdp.media = [sdp.media];
        } // Go through all medias in SDP to find offered capabilities to answer with.
  
  
        var _iterator = _createForOfIteratorHelper(sdp.media),
            _step;
  
        try {
          for (_iterator.s(); !(_step = _iterator.n()).done;) {
            var m = _step.value;
  
            if (m.type === 'audio') {
              peerHasAudioLine = true;
  
              if (!m.direction || m.direction === 'sendrecv') {
                peerOffersFullAudio = true;
              }
            }
  
            if (m.type === 'video') {
              peerHasVideoLine = true;
  
              if (!m.direction || m.direction === 'sendrecv') {
                peerOffersFullVideo = true;
              }
            }
          } // Remove audio from mediaStream if suggested by mediaConstraints.
  
        } catch (err) {
          _iterator.e(err);
        } finally {
          _iterator.f();
        }
  
        if (mediaStream && mediaConstraints.audio === false) {
          tracks = mediaStream.getAudioTracks();
  
          var _iterator2 = _createForOfIteratorHelper(tracks),
              _step2;
  
          try {
            for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
              var track = _step2.value;
              mediaStream.removeTrack(track);
            }
          } catch (err) {
            _iterator2.e(err);
          } finally {
            _iterator2.f();
          }
        } // Remove video from mediaStream if suggested by mediaConstraints.
  
  
        if (mediaStream && mediaConstraints.video === false) {
          tracks = mediaStream.getVideoTracks();
  
          var _iterator3 = _createForOfIteratorHelper(tracks),
              _step3;
  
          try {
            for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
              var _track = _step3.value;
              mediaStream.removeTrack(_track);
            }
          } catch (err) {
            _iterator3.e(err);
          } finally {
            _iterator3.f();
          }
        } // Set audio constraints based on incoming stream if not supplied.
  
  
        if (!mediaStream && mediaConstraints.audio === undefined) {
          mediaConstraints.audio = peerOffersFullAudio;
        } // Set video constraints based on incoming stream if not supplied.
  
  
        if (!mediaStream && mediaConstraints.video === undefined) {
          mediaConstraints.video = peerOffersFullVideo;
        } // Don't ask for audio if the incoming offer has no audio section.
  
  
        if (!mediaStream && !peerHasAudioLine) {
          mediaConstraints.audio = false;
        } // Don't ask for video if the incoming offer has no video section.
  
  
        if (!mediaStream && !peerHasVideoLine) {
          mediaConstraints.video = false;
        } // Create a new RTCPeerConnection instance.
        // TODO: This may throw an error, should react.
  
  
        this._createRTCConnection(pcConfig, rtcConstraints);
  
        Promise.resolve() // Handle local MediaStream.
        .then(function () {
          // A local MediaStream is given, use it.
          if (mediaStream) {
            return mediaStream;
          } // Audio and/or video requested, prompt getUserMedia.
          else if (mediaConstraints.audio || mediaConstraints.video) {
              _this3._localMediaStreamLocallyGenerated = true;
              return navigator.mediaDevices.getUserMedia(mediaConstraints)["catch"](function (error) {
                if (_this3._status === C.STATUS_TERMINATED) {
                  throw new Error('terminated');
                }
  
                request.reply(480);
  
                _this3._failed('local', null, JsSIP_C.causes.USER_DENIED_MEDIA_ACCESS);
  
                debugerror('emit "getusermediafailed" [error:%o]', error);
  
                _this3.emit('getusermediafailed', error);
  
                throw new Error('getUserMedia() failed');
              });
            }
        }) // Attach MediaStream to RTCPeerconnection.
        .then(function (stream) {
          if (_this3._status === C.STATUS_TERMINATED) {
            throw new Error('terminated');
          }
  
          _this3._localMediaStream = stream;
  
          if (stream) {
            stream.getTracks().forEach(function (track) {
              _this3._connection.addTrack(track, stream);
            });
          }
        }) // Set remote description.
        .then(function () {
          if (_this3._late_sdp) {
            return;
          }
  
          var e = {
            originator: 'remote',
            type: 'offer',
            sdp: request.body
          };
          debug('emit "sdp"');
  
          _this3.emit('sdp', e);
  
          var offer = new RTCSessionDescription({
            type: 'offer',
            sdp: e.sdp
          });
          _this3._connectionPromiseQueue = _this3._connectionPromiseQueue.then(function () {
            return _this3._connection.setRemoteDescription(offer);
          })["catch"](function (error) {
            request.reply(488);
  
            _this3._failed('system', null, JsSIP_C.causes.WEBRTC_ERROR);
  
            debugerror('emit "peerconnection:setremotedescriptionfailed" [error:%o]', error);
  
            _this3.emit('peerconnection:setremotedescriptionfailed', error);
  
            throw new Error('peerconnection.setRemoteDescription() failed');
          });
          return _this3._connectionPromiseQueue;
        }) // Create local description.
        .then(function () {
          if (_this3._status === C.STATUS_TERMINATED) {
            throw new Error('terminated');
          } // TODO: Is this event already useful?
  
  
          _this3._connecting(request);
  
          if (!_this3._late_sdp) {
            return _this3._createLocalDescription('answer', rtcAnswerConstraints)["catch"](function () {
              request.reply(500);
              throw new Error('_createLocalDescription() failed');
            });
          } else {
            return _this3._createLocalDescription('offer', _this3._rtcOfferConstraints)["catch"](function () {
              request.reply(500);
              throw new Error('_createLocalDescription() failed');
            });
          }
        }) // Send reply.
        .then(function (desc) {
          if (_this3._status === C.STATUS_TERMINATED) {
            throw new Error('terminated');
          }
  
          _this3._handleSessionTimersInIncomingRequest(request, extraHeaders);
  
          request.reply(200, null, extraHeaders, desc, function () {
            _this3._status = C.STATUS_WAITING_FOR_ACK;
  
            _this3._setInvite2xxTimer(request, desc);
  
            _this3._setACKTimer();
  
            _this3._accepted('local');
          }, function () {
            _this3._failed('system', null, JsSIP_C.causes.CONNECTION_ERROR);
          });
        })["catch"](function (error) {
          if (_this3._status === C.STATUS_TERMINATED) {
            return;
          }
  
          debugerror(error);
        });
      }
      /**
       * Terminate the call.
       */
  
    }, {
      key: "terminate",
      value: function terminate() {
        var _this4 = this;
  
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        debug('terminate()');
        var cause = options.cause || JsSIP_C.causes.BYE;
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var body = options.body;
        var cancel_reason;
        var status_code = options.status_code;
        var reason_phrase = options.reason_phrase; // Check Session Status.
  
        if (this._status === C.STATUS_TERMINATED) {
          throw new Exceptions.InvalidStateError(this._status);
        }
  
        switch (this._status) {
          // - UAC -
          case C.STATUS_NULL:
          case C.STATUS_INVITE_SENT:
          case C.STATUS_1XX_RECEIVED:
            debug('canceling session');
  
            if (status_code && (status_code < 200 || status_code >= 700)) {
              throw new TypeError("Invalid status_code: ".concat(status_code));
            } else if (status_code) {
              reason_phrase = reason_phrase || JsSIP_C.REASON_PHRASE[status_code] || '';
              cancel_reason = "SIP ;cause=".concat(status_code, " ;text=\"").concat(reason_phrase, "\"");
            } // Check Session Status.
  
  
            if (this._status === C.STATUS_NULL || this._status === C.STATUS_INVITE_SENT) {
              this._is_canceled = true;
              this._cancel_reason = cancel_reason;
            } else if (this._status === C.STATUS_1XX_RECEIVED) {
              this._request.cancel(cancel_reason);
            }
  
            this._status = C.STATUS_CANCELED;
  
            this._failed('local', null, JsSIP_C.causes.CANCELED);
  
            break;
          // - UAS -
  
          case C.STATUS_WAITING_FOR_ANSWER:
          case C.STATUS_ANSWERED:
            debug('rejecting session');
            status_code = status_code || 480;
  
            if (status_code < 300 || status_code >= 700) {
              throw new TypeError("Invalid status_code: ".concat(status_code));
            }
  
            this._request.reply(status_code, reason_phrase, extraHeaders, body);
  
            this._failed('local', null, JsSIP_C.causes.REJECTED);
  
            break;
  
          case C.STATUS_WAITING_FOR_ACK:
          case C.STATUS_CONFIRMED:
            debug('terminating session');
            reason_phrase = options.reason_phrase || JsSIP_C.REASON_PHRASE[status_code] || '';
  
            if (status_code && (status_code < 200 || status_code >= 700)) {
              throw new TypeError("Invalid status_code: ".concat(status_code));
            } else if (status_code) {
              extraHeaders.push("Reason: SIP ;cause=".concat(status_code, "; text=\"").concat(reason_phrase, "\""));
            }
            /* RFC 3261 section 15 (Terminating a session):
              *
              * "...the callee's UA MUST NOT send a BYE on a confirmed dialog
              * until it has received an ACK for its 2xx response or until the server
              * transaction times out."
              */
  
  
            if (this._status === C.STATUS_WAITING_FOR_ACK && this._direction === 'incoming' && this._request.server_transaction.state !== Transactions.C.STATUS_TERMINATED) {
              // Save the dialog for later restoration.
              var dialog = this._dialog; // Send the BYE as soon as the ACK is received...
  
              this.receiveRequest = function (_ref) {
                var method = _ref.method;
  
                if (method === JsSIP_C.ACK) {
                  _this4.sendRequest(JsSIP_C.BYE, {
                    extraHeaders: extraHeaders,
                    body: body
                  });
  
                  dialog.terminate();
                }
              }; // .., or when the INVITE transaction times out
  
  
              this._request.server_transaction.on('stateChanged', function () {
                if (_this4._request.server_transaction.state === Transactions.C.STATUS_TERMINATED) {
                  _this4.sendRequest(JsSIP_C.BYE, {
                    extraHeaders: extraHeaders,
                    body: body
                  });
  
                  dialog.terminate();
                }
              });
  
              this._ended('local', null, cause); // Restore the dialog into 'this' in order to be able to send the in-dialog BYE :-).
  
  
              this._dialog = dialog; // Restore the dialog into 'ua' so the ACK can reach 'this' session.
  
              this._ua.newDialog(dialog);
            } else {
              this.sendRequest(JsSIP_C.BYE, {
                extraHeaders: extraHeaders,
                body: body
              });
  
              this._ended('local', null, cause);
            }
  
        }
      }
    }, {
      key: "sendDTMF",
      value: function sendDTMF(tones) {
        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
        debug('sendDTMF() | tones: %s', tones);
        var position = 0;
        var duration = options.duration || null;
        var interToneGap = options.interToneGap || null;
  
        if (tones === undefined) {
          throw new TypeError('Not enough arguments');
        } // Check Session Status.
  
  
        if (this._status !== C.STATUS_CONFIRMED && this._status !== C.STATUS_WAITING_FOR_ACK) {
          throw new Exceptions.InvalidStateError(this._status);
        } // Convert to string.
  
  
        if (typeof tones === 'number') {
          tones = tones.toString();
        } // Check tones.
  
  
        if (!tones || typeof tones !== 'string' || !tones.match(/^[0-9A-DR#*,]+$/i)) {
          throw new TypeError("Invalid tones: ".concat(tones));
        } // Check duration.
  
  
        if (duration && !Utils.isDecimal(duration)) {
          throw new TypeError("Invalid tone duration: ".concat(duration));
        } else if (!duration) {
          duration = RTCSession_DTMF.C.DEFAULT_DURATION;
        } else if (duration < RTCSession_DTMF.C.MIN_DURATION) {
          debug("\"duration\" value is lower than the minimum allowed, setting it to ".concat(RTCSession_DTMF.C.MIN_DURATION, " milliseconds"));
          duration = RTCSession_DTMF.C.MIN_DURATION;
        } else if (duration > RTCSession_DTMF.C.MAX_DURATION) {
          debug("\"duration\" value is greater than the maximum allowed, setting it to ".concat(RTCSession_DTMF.C.MAX_DURATION, " milliseconds"));
          duration = RTCSession_DTMF.C.MAX_DURATION;
        } else {
          duration = Math.abs(duration);
        }
  
        options.duration = duration; // Check interToneGap.
  
        if (interToneGap && !Utils.isDecimal(interToneGap)) {
          throw new TypeError("Invalid interToneGap: ".concat(interToneGap));
        } else if (!interToneGap) {
          interToneGap = RTCSession_DTMF.C.DEFAULT_INTER_TONE_GAP;
        } else if (interToneGap < RTCSession_DTMF.C.MIN_INTER_TONE_GAP) {
          debug("\"interToneGap\" value is lower than the minimum allowed, setting it to ".concat(RTCSession_DTMF.C.MIN_INTER_TONE_GAP, " milliseconds"));
          interToneGap = RTCSession_DTMF.C.MIN_INTER_TONE_GAP;
        } else {
          interToneGap = Math.abs(interToneGap);
        }
  
        if (this._tones) {
          // Tones are already queued, just add to the queue.
          this._tones += tones;
          return;
        }
  
        this._tones = tones; // Send the first tone.
  
        _sendDTMF.call(this);
  
        function _sendDTMF() {
          var _this5 = this;
  
          var timeout;
  
          if (this._status === C.STATUS_TERMINATED || !this._tones || position >= this._tones.length) {
            // Stop sending DTMF.
            this._tones = null;
            return;
          }
  
          var tone = this._tones[position];
          position += 1;
  
          if (tone === ',') {
            timeout = 2000;
          } else {
            var dtmf = new RTCSession_DTMF(this);
            options.eventHandlers = {
              onFailed: function onFailed() {
                _this5._tones = null;
              }
            };
            dtmf.send(tone, options);
            timeout = duration + interToneGap;
          } // Set timeout for the next tone.
  
  
          setTimeout(_sendDTMF.bind(this), timeout);
        }
      }
    }, {
      key: "sendInfo",
      value: function sendInfo(contentType, body) {
        var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
        debug('sendInfo()'); // Check Session Status.
  
        if (this._status !== C.STATUS_CONFIRMED && this._status !== C.STATUS_WAITING_FOR_ACK) {
          throw new Exceptions.InvalidStateError(this._status);
        }
  
        var info = new RTCSession_Info(this);
        info.send(contentType, body, options);
      }
      /**
       * Mute
       */
  
    }, {
      key: "mute",
      value: function mute() {
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {
          audio: true,
          video: false
        };
        debug('mute()');
        var audioMuted = false,
            videoMuted = false;
  
        if (this._audioMuted === false && options.audio) {
          audioMuted = true;
          this._audioMuted = true;
  
          this._toggleMuteAudio(true);
        }
  
        if (this._videoMuted === false && options.video) {
          videoMuted = true;
          this._videoMuted = true;
  
          this._toggleMuteVideo(true);
        }
  
        if (audioMuted === true || videoMuted === true) {
          this._onmute({
            audio: audioMuted,
            video: videoMuted
          });
        }
      }
      /**
       * Unmute
       */
  
    }, {
      key: "unmute",
      value: function unmute() {
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {
          audio: true,
          video: true
        };
        debug('unmute()');
        var audioUnMuted = false,
            videoUnMuted = false;
  
        if (this._audioMuted === true && options.audio) {
          audioUnMuted = true;
          this._audioMuted = false;
  
          if (this._localHold === false) {
            this._toggleMuteAudio(false);
          }
        }
  
        if (this._videoMuted === true && options.video) {
          videoUnMuted = true;
          this._videoMuted = false;
  
          if (this._localHold === false) {
            this._toggleMuteVideo(false);
          }
        }
  
        if (audioUnMuted === true || videoUnMuted === true) {
          this._onunmute({
            audio: audioUnMuted,
            video: videoUnMuted
          });
        }
      }
      /**
       * Hold
       */
  
    }, {
      key: "hold",
      value: function hold() {
        var _this6 = this;
  
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        var done = arguments.length > 1 ? arguments[1] : undefined;
        debug('hold()');
  
        if (this._status !== C.STATUS_WAITING_FOR_ACK && this._status !== C.STATUS_CONFIRMED) {
          return false;
        }
  
        if (this._localHold === true) {
          return false;
        }
  
        if (!this._isReadyToReOffer()) {
          return false;
        }
  
        this._localHold = true;
  
        this._onhold('local');
  
        var eventHandlers = {
          succeeded: function succeeded() {
            if (done) {
              done();
            }
          },
          failed: function failed() {
            _this6.terminate({
              cause: JsSIP_C.causes.WEBRTC_ERROR,
              status_code: 500,
              reason_phrase: 'Hold Failed'
            });
          }
        };
  
        if (options.useUpdate) {
          this._sendUpdate({
            sdpOffer: true,
            eventHandlers: eventHandlers,
            extraHeaders: options.extraHeaders
          });
        } else {
          this._sendReinvite({
            eventHandlers: eventHandlers,
            extraHeaders: options.extraHeaders
          });
        }
  
        return true;
      }
    }, {
      key: "unhold",
      value: function unhold() {
        var _this7 = this;
  
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        var done = arguments.length > 1 ? arguments[1] : undefined;
        debug('unhold()');
  
        if (this._status !== C.STATUS_WAITING_FOR_ACK && this._status !== C.STATUS_CONFIRMED) {
          return false;
        }
  
        if (this._localHold === false) {
          return false;
        }
  
        if (!this._isReadyToReOffer()) {
          return false;
        }
  
        this._localHold = false;
  
        this._onunhold('local');
  
        var eventHandlers = {
          succeeded: function succeeded() {
            if (done) {
              done();
            }
          },
          failed: function failed() {
            _this7.terminate({
              cause: JsSIP_C.causes.WEBRTC_ERROR,
              status_code: 500,
              reason_phrase: 'Unhold Failed'
            });
          }
        };
  
        if (options.useUpdate) {
          this._sendUpdate({
            sdpOffer: true,
            eventHandlers: eventHandlers,
            extraHeaders: options.extraHeaders
          });
        } else {
          this._sendReinvite({
            eventHandlers: eventHandlers,
            extraHeaders: options.extraHeaders
          });
        }
  
        return true;
      }
    }, {
      key: "renegotiate",
      value: function renegotiate() {
        var _this8 = this;
  
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        var done = arguments.length > 1 ? arguments[1] : undefined;
        debug('renegotiate()');
        var rtcOfferConstraints = options.rtcOfferConstraints || null;
  
        if (this._status !== C.STATUS_WAITING_FOR_ACK && this._status !== C.STATUS_CONFIRMED) {
          return false;
        }
  
        if (!this._isReadyToReOffer()) {
          return false;
        }
  
        var eventHandlers = {
          succeeded: function succeeded() {
            if (done) {
              done();
            }
          },
          failed: function failed() {
            _this8.terminate({
              cause: JsSIP_C.causes.WEBRTC_ERROR,
              status_code: 500,
              reason_phrase: 'Media Renegotiation Failed'
            });
          }
        };
  
        this._setLocalMediaStatus();
  
        if (options.useUpdate) {
          this._sendUpdate({
            sdpOffer: true,
            eventHandlers: eventHandlers,
            rtcOfferConstraints: rtcOfferConstraints,
            extraHeaders: options.extraHeaders
          });
        } else {
          this._sendReinvite({
            eventHandlers: eventHandlers,
            rtcOfferConstraints: rtcOfferConstraints,
            extraHeaders: options.extraHeaders
          });
        }
  
        return true;
      }
      /**
       * Refer
       */
  
    }, {
      key: "refer",
      value: function refer(target, options) {
        var _this9 = this;
  
        debug('refer()');
        var originalTarget = target;
  
        if (this._status !== C.STATUS_WAITING_FOR_ACK && this._status !== C.STATUS_CONFIRMED) {
          return false;
        } // Check target validity.
  
  
        target = this._ua.normalizeTarget(target);
  
        if (!target) {
          throw new TypeError("Invalid target: ".concat(originalTarget));
        }
  
        var referSubscriber = new RTCSession_ReferSubscriber(this);
        referSubscriber.sendRefer(target, options); // Store in the map.
  
        var id = referSubscriber.id;
        this._referSubscribers[id] = referSubscriber; // Listen for ending events so we can remove it from the map.
  
        referSubscriber.on('requestFailed', function () {
          delete _this9._referSubscribers[id];
        });
        referSubscriber.on('accepted', function () {
          delete _this9._referSubscribers[id];
        });
        referSubscriber.on('failed', function () {
          delete _this9._referSubscribers[id];
        });
        return referSubscriber;
      }
      /**
       * Send a generic in-dialog Request
       */
  
    }, {
      key: "sendRequest",
      value: function sendRequest(method, options) {
        debug('sendRequest()');
        return this._dialog.sendRequest(method, options);
      }
      /**
       * In dialog Request Reception
       */
  
    }, {
      key: "receiveRequest",
      value: function receiveRequest(request) {
        var _this10 = this;
  
        debug('receiveRequest()');
  
        if (request.method === JsSIP_C.CANCEL) {
          /* RFC3261 15 States that a UAS may have accepted an invitation while a CANCEL
          * was in progress and that the UAC MAY continue with the session established by
          * any 2xx response, or MAY terminate with BYE. JsSIP does continue with the
          * established session. So the CANCEL is processed only if the session is not yet
          * established.
          */
  
          /*
          * Terminate the whole session in case the user didn't accept (or yet send the answer)
          * nor reject the request opening the session.
          */
          if (this._status === C.STATUS_WAITING_FOR_ANSWER || this._status === C.STATUS_ANSWERED) {
            this._status = C.STATUS_CANCELED;
  
            this._request.reply(487);
  
            this._failed('remote', request, JsSIP_C.causes.CANCELED);
          }
        } else {
          // Requests arriving here are in-dialog requests.
          switch (request.method) {
            case JsSIP_C.ACK:
              if (this._status !== C.STATUS_WAITING_FOR_ACK) {
                return;
              } // Update signaling status.
  
  
              this._status = C.STATUS_CONFIRMED;
              clearTimeout(this._timers.ackTimer);
              clearTimeout(this._timers.invite2xxTimer);
  
              if (this._late_sdp) {
                if (!request.body) {
                  this.terminate({
                    cause: JsSIP_C.causes.MISSING_SDP,
                    status_code: 400
                  });
                  break;
                }
  
                var e = {
                  originator: 'remote',
                  type: 'answer',
                  sdp: request.body
                };
                debug('emit "sdp"');
                this.emit('sdp', e);
                var answer = new RTCSessionDescription({
                  type: 'answer',
                  sdp: e.sdp
                });
                this._connectionPromiseQueue = this._connectionPromiseQueue.then(function () {
                  return _this10._connection.setRemoteDescription(answer);
                }).then(function () {
                  if (!_this10._is_confirmed) {
                    _this10._confirmed('remote', request);
                  }
                })["catch"](function (error) {
                  _this10.terminate({
                    cause: JsSIP_C.causes.BAD_MEDIA_DESCRIPTION,
                    status_code: 488
                  });
  
                  debugerror('emit "peerconnection:setremotedescriptionfailed" [error:%o]', error);
  
                  _this10.emit('peerconnection:setremotedescriptionfailed', error);
                });
              } else if (!this._is_confirmed) {
                this._confirmed('remote', request);
              }
  
              break;
  
            case JsSIP_C.BYE:
              if (this._status === C.STATUS_CONFIRMED || this._status === C.STATUS_WAITING_FOR_ACK) {
                request.reply(200);
  
                this._ended('remote', request, JsSIP_C.causes.BYE);
              } else if (this._status === C.STATUS_INVITE_RECEIVED) {
                request.reply(200);
  
                this._request.reply(487, 'BYE Received');
  
                this._ended('remote', request, JsSIP_C.causes.BYE);
              } else {
                request.reply(403, 'Wrong Status');
              }
  
              break;
  
            case JsSIP_C.INVITE:
              if (this._status === C.STATUS_CONFIRMED) {
                if (request.hasHeader('replaces')) {
                  this._receiveReplaces(request);
                } else {
                  this._receiveReinvite(request);
                }
              } else {
                request.reply(403, 'Wrong Status');
              }
  
              break;
  
            case JsSIP_C.INFO:
              if (this._status === C.STATUS_1XX_RECEIVED || this._status === C.STATUS_WAITING_FOR_ANSWER || this._status === C.STATUS_ANSWERED || this._status === C.STATUS_WAITING_FOR_ACK || this._status === C.STATUS_CONFIRMED) {
                var contentType = request.getHeader('content-type');
  
                if (contentType && contentType.match(/^application\/dtmf-relay/i)) {
                  new RTCSession_DTMF(this).init_incoming(request);
                } else if (contentType !== undefined) {
                  new RTCSession_Info(this).init_incoming(request);
                } else {
                  request.reply(415);
                }
              } else {
                request.reply(403, 'Wrong Status');
              }
  
              break;
  
            case JsSIP_C.UPDATE:
              if (this._status === C.STATUS_CONFIRMED) {
                this._receiveUpdate(request);
              } else {
                request.reply(403, 'Wrong Status');
              }
  
              break;
  
            case JsSIP_C.REFER:
              if (this._status === C.STATUS_CONFIRMED) {
                this._receiveRefer(request);
              } else {
                request.reply(403, 'Wrong Status');
              }
  
              break;
  
            case JsSIP_C.NOTIFY:
              if (this._status === C.STATUS_CONFIRMED) {
                this._receiveNotify(request);
              } else {
                request.reply(403, 'Wrong Status');
              }
  
              break;
  
            default:
              request.reply(501);
          }
        }
      }
      /**
       * Session Callbacks
       */
  
    }, {
      key: "onTransportError",
      value: function onTransportError() {
        debugerror('onTransportError()');
  
        if (this._status !== C.STATUS_TERMINATED) {
          this.terminate({
            status_code: 500,
            reason_phrase: JsSIP_C.causes.CONNECTION_ERROR,
            cause: JsSIP_C.causes.CONNECTION_ERROR
          });
        }
      }
    }, {
      key: "onRequestTimeout",
      value: function onRequestTimeout() {
        debugerror('onRequestTimeout()');
  
        if (this._status !== C.STATUS_TERMINATED) {
          this.terminate({
            status_code: 408,
            reason_phrase: JsSIP_C.causes.REQUEST_TIMEOUT,
            cause: JsSIP_C.causes.REQUEST_TIMEOUT
          });
        }
      }
    }, {
      key: "onDialogError",
      value: function onDialogError() {
        debugerror('onDialogError()');
  
        if (this._status !== C.STATUS_TERMINATED) {
          this.terminate({
            status_code: 500,
            reason_phrase: JsSIP_C.causes.DIALOG_ERROR,
            cause: JsSIP_C.causes.DIALOG_ERROR
          });
        }
      } // Called from DTMF handler.
  
    }, {
      key: "newDTMF",
      value: function newDTMF(data) {
        debug('newDTMF()');
        this.emit('newDTMF', data);
      } // Called from Info handler.
  
    }, {
      key: "newInfo",
      value: function newInfo(data) {
        debug('newInfo()');
        this.emit('newInfo', data);
      }
      /**
       * Check if RTCSession is ready for an outgoing re-INVITE or UPDATE with SDP.
       */
  
    }, {
      key: "_isReadyToReOffer",
      value: function _isReadyToReOffer() {
        if (!this._rtcReady) {
          debug('_isReadyToReOffer() | internal WebRTC status not ready');
          return false;
        } // No established yet.
  
  
        if (!this._dialog) {
          debug('_isReadyToReOffer() | session not established yet');
          return false;
        } // Another INVITE transaction is in progress.
  
  
        if (this._dialog.uac_pending_reply === true || this._dialog.uas_pending_reply === true) {
          debug('_isReadyToReOffer() | there is another INVITE/UPDATE transaction in progress');
          return false;
        }
  
        return true;
      }
    }, {
      key: "_close",
      value: function _close() {
        debug('close()');
  
        if (this._status === C.STATUS_TERMINATED) {
          return;
        }
  
        this._status = C.STATUS_TERMINATED; // Terminate RTC.
  
        if (this._connection) {
          try {
            this._connection.close();
          } catch (error) {
            debugerror('close() | error closing the RTCPeerConnection: %o', error);
          }
        } // Close local MediaStream if it was not given by the user.
  
  
        if (this._localMediaStream && this._localMediaStreamLocallyGenerated) {
          debug('close() | closing local MediaStream');
          Utils.closeMediaStream(this._localMediaStream);
        } // Terminate signaling.
        // Clear SIP timers.
  
  
        for (var timer in this._timers) {
          if (Object.prototype.hasOwnProperty.call(this._timers, timer)) {
            clearTimeout(this._timers[timer]);
          }
        } // Clear Session Timers.
  
  
        clearTimeout(this._sessionTimers.timer); // Terminate confirmed dialog.
  
        if (this._dialog) {
          this._dialog.terminate();
  
          delete this._dialog;
        } // Terminate early dialogs.
  
  
        for (var dialog in this._earlyDialogs) {
          if (Object.prototype.hasOwnProperty.call(this._earlyDialogs, dialog)) {
            this._earlyDialogs[dialog].terminate();
  
            delete this._earlyDialogs[dialog];
          }
        } // Terminate REFER subscribers.
  
  
        for (var subscriber in this._referSubscribers) {
          if (Object.prototype.hasOwnProperty.call(this._referSubscribers, subscriber)) {
            delete this._referSubscribers[subscriber];
          }
        }
  
        this._ua.destroyRTCSession(this);
      }
      /**
       * Private API.
       */
  
      /**
       * RFC3261 13.3.1.4
       * Response retransmissions cannot be accomplished by transaction layer
       *  since it is destroyed when receiving the first 2xx answer
       */
  
    }, {
      key: "_setInvite2xxTimer",
      value: function _setInvite2xxTimer(request, body) {
        var timeout = Timers.T1;
  
        function invite2xxRetransmission() {
          if (this._status !== C.STATUS_WAITING_FOR_ACK) {
            return;
          }
  
          request.reply(200, null, ["Contact: ".concat(this._contact)], body);
  
          if (timeout < Timers.T2) {
            timeout = timeout * 2;
  
            if (timeout > Timers.T2) {
              timeout = Timers.T2;
            }
          }
  
          this._timers.invite2xxTimer = setTimeout(invite2xxRetransmission.bind(this), timeout);
        }
  
        this._timers.invite2xxTimer = setTimeout(invite2xxRetransmission.bind(this), timeout);
      }
      /**
       * RFC3261 14.2
       * If a UAS generates a 2xx response and never receives an ACK,
       *  it SHOULD generate a BYE to terminate the dialog.
       */
  
    }, {
      key: "_setACKTimer",
      value: function _setACKTimer() {
        var _this11 = this;
  
        this._timers.ackTimer = setTimeout(function () {
          if (_this11._status === C.STATUS_WAITING_FOR_ACK) {
            debug('no ACK received, terminating the session');
            clearTimeout(_this11._timers.invite2xxTimer);
  
            _this11.sendRequest(JsSIP_C.BYE);
  
            _this11._ended('remote', null, JsSIP_C.causes.NO_ACK);
          }
        }, Timers.TIMER_H);
      }
    }, {
      key: "_createRTCConnection",
      value: function _createRTCConnection(pcConfig, rtcConstraints) {
        var _this12 = this;
  
        this._connection = new RTCPeerConnection(pcConfig, rtcConstraints);
  
        this._connection.addEventListener('iceconnectionstatechange', function () {
          var state = _this12._connection.iceConnectionState; // TODO: Do more with different states.
  
          if (state === 'failed') {
            _this12.terminate({
              cause: JsSIP_C.causes.RTP_TIMEOUT,
              status_code: 408,
              reason_phrase: JsSIP_C.causes.RTP_TIMEOUT
            });
          }
        });
  
        debug('emit "peerconnection"');
        this.emit('peerconnection', {
          peerconnection: this._connection
        });
      }
    }, {
      key: "_createLocalDescription",
      value: function _createLocalDescription(type, constraints) {
        var _this13 = this;
  
        debug('createLocalDescription()');
        if (type !== 'offer' && type !== 'answer') throw new Error("createLocalDescription() | invalid type \"".concat(type, "\""));
        var connection = this._connection;
        this._rtcReady = false;
        return Promise.resolve() // Create Offer or Answer.
        .then(function () {
          if (type === 'offer') {
            return connection.createOffer(constraints)["catch"](function (error) {
              debugerror('emit "peerconnection:createofferfailed" [error:%o]', error);
  
              _this13.emit('peerconnection:createofferfailed', error);
  
              return Promise.reject(error);
            });
          } else {
            return connection.createAnswer(constraints)["catch"](function (error) {
              debugerror('emit "peerconnection:createanswerfailed" [error:%o]', error);
  
              _this13.emit('peerconnection:createanswerfailed', error);
  
              return Promise.reject(error);
            });
          }
        }) // Set local description.
        .then(function (desc) {
          return connection.setLocalDescription(desc)["catch"](function (error) {
            _this13._rtcReady = true;
            debugerror('emit "peerconnection:setlocaldescriptionfailed" [error:%o]', error);
  
            _this13.emit('peerconnection:setlocaldescriptionfailed', error);
  
            return Promise.reject(error);
          });
        }).then(function () {
          // Resolve right away if 'pc.iceGatheringState' is 'complete'.
          if (connection.iceGatheringState === 'complete') {
            _this13._rtcReady = true;
            var e = {
              originator: 'local',
              type: type,
              sdp: connection.localDescription.sdp
            };
            debug('emit "sdp"');
  
            _this13.emit('sdp', e);
  
            return Promise.resolve(e.sdp);
          } // Add 'pc.onicencandidate' event handler to resolve on last candidate.
  
  
          return new Promise(function (resolve) {
            var finished = false;
            var iceCandidateListener;
            var iceGatheringStateListener;
  
            var ready = function ready() {
              connection.removeEventListener('icecandidate', iceCandidateListener);
              connection.removeEventListener('icegatheringstatechange', iceGatheringStateListener);
              finished = true;
              _this13._rtcReady = true;
              var e = {
                originator: 'local',
                type: type,
                sdp: connection.localDescription.sdp
              };
              debug('emit "sdp"');
  
              _this13.emit('sdp', e);
  
              resolve(e.sdp);
            };
  
            connection.addEventListener('icecandidate', iceCandidateListener = function iceCandidateListener(event) {
              var candidate = event.candidate;
  
              if (candidate) {
                _this13.emit('icecandidate', {
                  candidate: candidate,
                  ready: ready
                });
              } else if (!finished) {
                ready();
              }
            });
            connection.addEventListener('icegatheringstatechange', iceGatheringStateListener = function iceGatheringStateListener() {
              if (connection.iceGatheringState === 'complete' && !finished) {
                ready();
              }
            });
          });
        });
      }
      /**
       * Dialog Management
       */
  
    }, {
      key: "_createDialog",
      value: function _createDialog(message, type, early) {
        var local_tag = type === 'UAS' ? message.to_tag : message.from_tag;
        var remote_tag = type === 'UAS' ? message.from_tag : message.to_tag;
        var id = message.call_id + local_tag + remote_tag;
        var early_dialog = this._earlyDialogs[id]; // Early Dialog.
  
        if (early) {
          if (early_dialog) {
            return true;
          } else {
            early_dialog = new Dialog(this, message, type, Dialog.C.STATUS_EARLY); // Dialog has been successfully created.
  
            if (early_dialog.error) {
              debug(early_dialog.error);
  
              this._failed('remote', message, JsSIP_C.causes.INTERNAL_ERROR);
  
              return false;
            } else {
              this._earlyDialogs[id] = early_dialog;
              return true;
            }
          }
        } // Confirmed Dialog.
        else {
            this._from_tag = message.from_tag;
            this._to_tag = message.to_tag; // In case the dialog is in _early_ state, update it.
  
            if (early_dialog) {
              early_dialog.update(message, type);
              this._dialog = early_dialog;
              delete this._earlyDialogs[id];
              return true;
            } // Otherwise, create a _confirmed_ dialog.
  
  
            var dialog = new Dialog(this, message, type);
  
            if (dialog.error) {
              debug(dialog.error);
  
              this._failed('remote', message, JsSIP_C.causes.INTERNAL_ERROR);
  
              return false;
            } else {
              this._dialog = dialog;
              return true;
            }
          }
      }
      /**
       * In dialog INVITE Reception
       */
  
    }, {
      key: "_receiveReinvite",
      value: function _receiveReinvite(request) {
        var _this14 = this;
  
        debug('receiveReinvite()');
        var contentType = request.getHeader('Content-Type');
        var data = {
          request: request,
          callback: undefined,
          reject: reject.bind(this)
        };
        var rejected = false;
  
        function reject() {
          var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
          rejected = true;
          var status_code = options.status_code || 403;
          var reason_phrase = options.reason_phrase || '';
          var extraHeaders = Utils.cloneArray(options.extraHeaders);
  
          if (this._status !== C.STATUS_CONFIRMED) {
            return false;
          }
  
          if (status_code < 300 || status_code >= 700) {
            throw new TypeError("Invalid status_code: ".concat(status_code));
          }
  
          request.reply(status_code, reason_phrase, extraHeaders);
        } // Emit 'reinvite'.
  
  
        this.emit('reinvite', data);
  
        if (rejected) {
          return;
        }
  
        this._late_sdp = false; // Request without SDP.
  
        if (!request.body) {
          this._late_sdp = true;
          this._connectionPromiseQueue = this._connectionPromiseQueue.then(function () {
            return _this14._createLocalDescription('offer', _this14._rtcOfferConstraints);
          }).then(function (sdp) {
            sendAnswer.call(_this14, sdp);
          })["catch"](function () {
            request.reply(500);
          });
          return;
        } // Request with SDP.
  
  
        if (contentType !== 'application/sdp') {
          debug('invalid Content-Type');
          request.reply(415);
          return;
        }
  
        this._processInDialogSdpOffer(request) // Send answer.
        .then(function (desc) {
          if (_this14._status === C.STATUS_TERMINATED) {
            return;
          }
  
          sendAnswer.call(_this14, desc);
        })["catch"](function (error) {
          debugerror(error);
        });
  
        function sendAnswer(desc) {
          var _this15 = this;
  
          var extraHeaders = ["Contact: ".concat(this._contact)];
  
          this._handleSessionTimersInIncomingRequest(request, extraHeaders);
  
          if (this._late_sdp) {
            desc = this._mangleOffer(desc);
          }
  
          request.reply(200, null, extraHeaders, desc, function () {
            _this15._status = C.STATUS_WAITING_FOR_ACK;
  
            _this15._setInvite2xxTimer(request, desc);
  
            _this15._setACKTimer();
          }); // If callback is given execute it.
  
          if (typeof data.callback === 'function') {
            data.callback();
          }
        }
      }
      /**
       * In dialog UPDATE Reception
       */
  
    }, {
      key: "_receiveUpdate",
      value: function _receiveUpdate(request) {
        var _this16 = this;
  
        debug('receiveUpdate()');
        var contentType = request.getHeader('Content-Type');
        var data = {
          request: request,
          callback: undefined,
          reject: reject.bind(this)
        };
        var rejected = false;
  
        function reject() {
          var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
          rejected = true;
          var status_code = options.status_code || 403;
          var reason_phrase = options.reason_phrase || '';
          var extraHeaders = Utils.cloneArray(options.extraHeaders);
  
          if (this._status !== C.STATUS_CONFIRMED) {
            return false;
          }
  
          if (status_code < 300 || status_code >= 700) {
            throw new TypeError("Invalid status_code: ".concat(status_code));
          }
  
          request.reply(status_code, reason_phrase, extraHeaders);
        } // Emit 'update'.
  
  
        this.emit('update', data);
  
        if (rejected) {
          return;
        }
  
        if (!request.body) {
          sendAnswer.call(this, null);
          return;
        }
  
        if (contentType !== 'application/sdp') {
          debug('invalid Content-Type');
          request.reply(415);
          return;
        }
  
        this._processInDialogSdpOffer(request) // Send answer.
        .then(function (desc) {
          if (_this16._status === C.STATUS_TERMINATED) {
            return;
          }
  
          sendAnswer.call(_this16, desc);
        })["catch"](function (error) {
          debugerror(error);
        });
  
        function sendAnswer(desc) {
          var extraHeaders = ["Contact: ".concat(this._contact)];
  
          this._handleSessionTimersInIncomingRequest(request, extraHeaders);
  
          request.reply(200, null, extraHeaders, desc); // If callback is given execute it.
  
          if (typeof data.callback === 'function') {
            data.callback();
          }
        }
      }
    }, {
      key: "_processInDialogSdpOffer",
      value: function _processInDialogSdpOffer(request) {
        var _this17 = this;
  
        debug('_processInDialogSdpOffer()');
        var sdp = request.parseSDP();
        var hold = false;
  
        var _iterator4 = _createForOfIteratorHelper(sdp.media),
            _step4;
  
        try {
          for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
            var m = _step4.value;
  
            if (holdMediaTypes.indexOf(m.type) === -1) {
              continue;
            }
  
            var direction = m.direction || sdp.direction || 'sendrecv';
  
            if (direction === 'sendonly' || direction === 'inactive') {
              hold = true;
            } // If at least one of the streams is active don't emit 'hold'.
            else {
                hold = false;
                break;
              }
          }
        } catch (err) {
          _iterator4.e(err);
        } finally {
          _iterator4.f();
        }
  
        var e = {
          originator: 'remote',
          type: 'offer',
          sdp: request.body
        };
        debug('emit "sdp"');
        this.emit('sdp', e);
        var offer = new RTCSessionDescription({
          type: 'offer',
          sdp: e.sdp
        });
        this._connectionPromiseQueue = this._connectionPromiseQueue // Set remote description.
        .then(function () {
          if (_this17._status === C.STATUS_TERMINATED) {
            throw new Error('terminated');
          }
  
          return _this17._connection.setRemoteDescription(offer)["catch"](function (error) {
            request.reply(488);
            debugerror('emit "peerconnection:setremotedescriptionfailed" [error:%o]', error);
  
            _this17.emit('peerconnection:setremotedescriptionfailed', error);
  
            throw new Error('peerconnection.setRemoteDescription() failed');
          });
        }).then(function () {
          if (_this17._status === C.STATUS_TERMINATED) {
            throw new Error('terminated');
          }
  
          if (_this17._remoteHold === true && hold === false) {
            _this17._remoteHold = false;
  
            _this17._onunhold('remote');
          } else if (_this17._remoteHold === false && hold === true) {
            _this17._remoteHold = true;
  
            _this17._onhold('remote');
          }
        }) // Create local description.
        .then(function () {
          if (_this17._status === C.STATUS_TERMINATED) {
            throw new Error('terminated');
          }
  
          return _this17._createLocalDescription('answer', _this17._rtcAnswerConstraints)["catch"](function () {
            request.reply(500);
            throw new Error('_createLocalDescription() failed');
          });
        });
        return this._connectionPromiseQueue;
      }
      /**
       * In dialog Refer Reception
       */
  
    }, {
      key: "_receiveRefer",
      value: function _receiveRefer(request) {
        var _this18 = this;
  
        debug('receiveRefer()');
  
        if (!request.refer_to) {
          debug('no Refer-To header field present in REFER');
          request.reply(400);
          return;
        }
  
        if (request.refer_to.uri.scheme !== JsSIP_C.SIP) {
          debug('Refer-To header field points to a non-SIP URI scheme');
          request.reply(416);
          return;
        } // Reply before the transaction timer expires.
  
  
        request.reply(202);
        var notifier = new RTCSession_ReferNotifier(this, request.cseq);
        debug('emit "refer"'); // Emit 'refer'.
  
        this.emit('refer', {
          request: request,
          accept: function accept(initCallback, options) {
            _accept.call(_this18, initCallback, options);
          },
          reject: function reject() {
            _reject.call(_this18);
          }
        });
  
        function _accept(initCallback) {
          var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
          initCallback = typeof initCallback === 'function' ? initCallback : null;
  
          if (this._status !== C.STATUS_WAITING_FOR_ACK && this._status !== C.STATUS_CONFIRMED) {
            return false;
          }
  
          var session = new RTCSession(this._ua);
          session.on('progress', function (_ref2) {
            var response = _ref2.response;
            notifier.notify(response.status_code, response.reason_phrase);
          });
          session.on('accepted', function (_ref3) {
            var response = _ref3.response;
            notifier.notify(response.status_code, response.reason_phrase);
          });
          session.on('_failed', function (_ref4) {
            var message = _ref4.message,
                cause = _ref4.cause;
  
            if (message) {
              notifier.notify(message.status_code, message.reason_phrase);
            } else {
              notifier.notify(487, cause);
            }
          }); // Consider the Replaces header present in the Refer-To URI.
  
          if (request.refer_to.uri.hasHeader('replaces')) {
            var replaces = decodeURIComponent(request.refer_to.uri.getHeader('replaces'));
            options.extraHeaders = Utils.cloneArray(options.extraHeaders);
            options.extraHeaders.push("Replaces: ".concat(replaces));
          }
  
          session.connect(request.refer_to.uri.toAor(), options, initCallback);
        }
  
        function _reject() {
          notifier.notify(603);
        }
      }
      /**
       * In dialog Notify Reception
       */
  
    }, {
      key: "_receiveNotify",
      value: function _receiveNotify(request) {
        debug('receiveNotify()');
  
        if (!request.event) {
          request.reply(400);
        }
  
        switch (request.event.event) {
          case 'refer':
            {
              var id;
              var referSubscriber;
  
              if (request.event.params && request.event.params.id) {
                id = request.event.params.id;
                referSubscriber = this._referSubscribers[id];
              } else if (Object.keys(this._referSubscribers).length === 1) {
                referSubscriber = this._referSubscribers[Object.keys(this._referSubscribers)[0]];
              } else {
                request.reply(400, 'Missing event id parameter');
                return;
              }
  
              if (!referSubscriber) {
                request.reply(481, 'Subscription does not exist');
                return;
              }
  
              referSubscriber.receiveNotify(request);
              request.reply(200);
              break;
            }
  
          default:
            {
              request.reply(489);
            }
        }
      }
      /**
       * INVITE with Replaces Reception
       */
  
    }, {
      key: "_receiveReplaces",
      value: function _receiveReplaces(request) {
        var _this20 = this;
  
        debug('receiveReplaces()');
  
        function _accept2(initCallback) {
          var _this19 = this;
  
          if (this._status !== C.STATUS_WAITING_FOR_ACK && this._status !== C.STATUS_CONFIRMED) {
            return false;
          }
  
          var session = new RTCSession(this._ua); // Terminate the current session when the new one is confirmed.
  
          session.on('confirmed', function () {
            _this19.terminate();
          });
          session.init_incoming(request, initCallback);
        }
  
        function _reject2() {
          debug('Replaced INVITE rejected by the user');
          request.reply(486);
        } // Emit 'replace'.
  
  
        this.emit('replaces', {
          request: request,
          accept: function accept(initCallback) {
            _accept2.call(_this20, initCallback);
          },
          reject: function reject() {
            _reject2.call(_this20);
          }
        });
      }
      /**
       * Initial Request Sender
       */
  
    }, {
      key: "_sendInitialRequest",
      value: function _sendInitialRequest(mediaConstraints, rtcOfferConstraints, mediaStream) {
        var _this21 = this;
  
        var request_sender = new RequestSender(this._ua, this._request, {
          onRequestTimeout: function onRequestTimeout() {
            _this21.onRequestTimeout();
          },
          onTransportError: function onTransportError() {
            _this21.onTransportError();
          },
          // Update the request on authentication.
          onAuthenticated: function onAuthenticated(request) {
            _this21._request = request;
          },
          onReceiveResponse: function onReceiveResponse(response) {
            _this21._receiveInviteResponse(response);
          }
        }); // This Promise is resolved within the next iteration, so the app has now
        // a chance to set events such as 'peerconnection' and 'connecting'.
  
        Promise.resolve() // Get a stream if required.
        .then(function () {
          // A stream is given, let the app set events such as 'peerconnection' and 'connecting'.
          if (mediaStream) {
            return mediaStream;
          } // Request for user media access.
          else if (mediaConstraints.audio || mediaConstraints.video) {
              _this21._localMediaStreamLocallyGenerated = true;
              return navigator.mediaDevices.getUserMedia(mediaConstraints)["catch"](function (error) {
                if (_this21._status === C.STATUS_TERMINATED) {
                  throw new Error('terminated');
                }
  
                _this21._failed('local', null, JsSIP_C.causes.USER_DENIED_MEDIA_ACCESS);
  
                debugerror('emit "getusermediafailed" [error:%o]', error);
  
                _this21.emit('getusermediafailed', error);
  
                throw error;
              });
            }
        }).then(function (stream) {
          if (_this21._status === C.STATUS_TERMINATED) {
            throw new Error('terminated');
          }
  
          _this21._localMediaStream = stream;
  
          if (stream) {
            stream.getTracks().forEach(function (track) {
              _this21._connection.addTrack(track, stream);
            });
          } // TODO: should this be triggered here?
  
  
          _this21._connecting(_this21._request);
  
          return _this21._createLocalDescription('offer', rtcOfferConstraints)["catch"](function (error) {
            _this21._failed('local', null, JsSIP_C.causes.WEBRTC_ERROR);
  
            throw error;
          });
        }).then(function (desc) {
          if (_this21._is_canceled || _this21._status === C.STATUS_TERMINATED) {
            throw new Error('terminated');
          }
  
          _this21._request.body = desc;
          _this21._status = C.STATUS_INVITE_SENT;
          debug('emit "sending" [request:%o]', _this21._request); // Emit 'sending' so the app can mangle the body before the request is sent.
  
          _this21.emit('sending', {
            request: _this21._request
          });
  
          request_sender.send();
        })["catch"](function (error) {
          if (_this21._status === C.STATUS_TERMINATED) {
            return;
          }
  
          debugerror(error);
        });
      }
      /**
       * Reception of Response for Initial INVITE
       */
  
    }, {
      key: "_receiveInviteResponse",
      value: function _receiveInviteResponse(response) {
        var _this22 = this;
  
        debug('receiveInviteResponse()'); // Handle 2XX retransmissions and responses from forked requests.
  
        if (this._dialog && response.status_code >= 200 && response.status_code <= 299) {
          /*
           * If it is a retransmission from the endpoint that established
           * the dialog, send an ACK
           */
          if (this._dialog.id.call_id === response.call_id && this._dialog.id.local_tag === response.from_tag && this._dialog.id.remote_tag === response.to_tag) {
            this.sendRequest(JsSIP_C.ACK);
            return;
          } // If not, send an ACK  and terminate.
          else {
              var dialog = new Dialog(this, response, 'UAC');
  
              if (dialog.error !== undefined) {
                debug(dialog.error);
                return;
              }
  
              this.sendRequest(JsSIP_C.ACK);
              this.sendRequest(JsSIP_C.BYE);
              return;
            }
        } // Proceed to cancellation if the user requested.
  
  
        if (this._is_canceled) {
          if (response.status_code >= 100 && response.status_code < 200) {
            this._request.cancel(this._cancel_reason);
          } else if (response.status_code >= 200 && response.status_code < 299) {
            this._acceptAndTerminate(response);
          }
  
          return;
        }
  
        if (this._status !== C.STATUS_INVITE_SENT && this._status !== C.STATUS_1XX_RECEIVED) {
          return;
        }
  
        switch (true) {
          case /^100$/.test(response.status_code):
            this._status = C.STATUS_1XX_RECEIVED;
            break;
  
          case /^1[0-9]{2}$/.test(response.status_code):
            {
              // Do nothing with 1xx responses without To tag.
              if (!response.to_tag) {
                debug('1xx response received without to tag');
                break;
              } // Create Early Dialog if 1XX comes with contact.
  
  
              if (response.hasHeader('contact')) {
                // An error on dialog creation will fire 'failed' event.
                if (!this._createDialog(response, 'UAC', true)) {
                  break;
                }
              }
  
              this._status = C.STATUS_1XX_RECEIVED;
  
              this._progress('remote', response);
  
              if (!response.body) {
                break;
              }
  
              var e = {
                originator: 'remote',
                type: 'answer',
                sdp: response.body
              };
              debug('emit "sdp"');
              this.emit('sdp', e);
              var answer = new RTCSessionDescription({
                type: 'answer',
                sdp: e.sdp
              });
              this._connectionPromiseQueue = this._connectionPromiseQueue.then(function () {
                return _this22._connection.setRemoteDescription(answer);
              })["catch"](function (error) {
                debugerror('emit "peerconnection:setremotedescriptionfailed" [error:%o]', error);
  
                _this22.emit('peerconnection:setremotedescriptionfailed', error);
              });
              break;
            }
  
          case /^2[0-9]{2}$/.test(response.status_code):
            {
              this._status = C.STATUS_CONFIRMED;
  
              if (!response.body) {
                this._acceptAndTerminate(response, 400, JsSIP_C.causes.MISSING_SDP);
  
                this._failed('remote', response, JsSIP_C.causes.BAD_MEDIA_DESCRIPTION);
  
                break;
              } // An error on dialog creation will fire 'failed' event.
  
  
              if (!this._createDialog(response, 'UAC')) {
                break;
              }
  
              var _e = {
                originator: 'remote',
                type: 'answer',
                sdp: response.body
              };
              debug('emit "sdp"');
              this.emit('sdp', _e);
  
              var _answer = new RTCSessionDescription({
                type: 'answer',
                sdp: _e.sdp
              });
  
              this._connectionPromiseQueue = this._connectionPromiseQueue.then(function () {
                // Be ready for 200 with SDP after a 180/183 with SDP.
                // We created a SDP 'answer' for it, so check the current signaling state.
                if (_this22._connection.signalingState === 'stable') {
                  return _this22._connection.createOffer(_this22._rtcOfferConstraints).then(function (offer) {
                    return _this22._connection.setLocalDescription(offer);
                  })["catch"](function (error) {
                    _this22._acceptAndTerminate(response, 500, error.toString());
  
                    _this22._failed('local', response, JsSIP_C.causes.WEBRTC_ERROR);
                  });
                }
              }).then(function () {
                _this22._connection.setRemoteDescription(_answer).then(function () {
                  // Handle Session Timers.
                  _this22._handleSessionTimersInIncomingResponse(response);
  
                  _this22._accepted('remote', response);
  
                  _this22.sendRequest(JsSIP_C.ACK);
  
                  _this22._confirmed('local', null);
                })["catch"](function (error) {
                  _this22._acceptAndTerminate(response, 488, 'Not Acceptable Here');
  
                  _this22._failed('remote', response, JsSIP_C.causes.BAD_MEDIA_DESCRIPTION);
  
                  debugerror('emit "peerconnection:setremotedescriptionfailed" [error:%o]', error);
  
                  _this22.emit('peerconnection:setremotedescriptionfailed', error);
                });
              });
              break;
            }
  
          default:
            {
              var cause = Utils.sipErrorCause(response.status_code);
  
              this._failed('remote', response, cause);
            }
        }
      }
      /**
       * Send Re-INVITE
       */
  
    }, {
      key: "_sendReinvite",
      value: function _sendReinvite() {
        var _this23 = this;
  
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        debug('sendReinvite()');
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var eventHandlers = options.eventHandlers || {};
        var rtcOfferConstraints = options.rtcOfferConstraints || this._rtcOfferConstraints || null;
        var succeeded = false;
        extraHeaders.push("Contact: ".concat(this._contact));
        extraHeaders.push('Content-Type: application/sdp'); // Session Timers.
  
        if (this._sessionTimers.running) {
          extraHeaders.push("Session-Expires: ".concat(this._sessionTimers.currentExpires, ";refresher=").concat(this._sessionTimers.refresher ? 'uac' : 'uas'));
        }
  
        this._connectionPromiseQueue = this._connectionPromiseQueue.then(function () {
          return _this23._createLocalDescription('offer', rtcOfferConstraints);
        }).then(function (sdp) {
          sdp = _this23._mangleOffer(sdp);
          var e = {
            originator: 'local',
            type: 'offer',
            sdp: sdp
          };
          debug('emit "sdp"');
  
          _this23.emit('sdp', e);
  
          _this23.sendRequest(JsSIP_C.INVITE, {
            extraHeaders: extraHeaders,
            body: sdp,
            eventHandlers: {
              onSuccessResponse: function onSuccessResponse(response) {
                onSucceeded.call(_this23, response);
                succeeded = true;
              },
              onErrorResponse: function onErrorResponse(response) {
                onFailed.call(_this23, response);
              },
              onTransportError: function onTransportError() {
                _this23.onTransportError(); // Do nothing because session ends.
  
              },
              onRequestTimeout: function onRequestTimeout() {
                _this23.onRequestTimeout(); // Do nothing because session ends.
  
              },
              onDialogError: function onDialogError() {
                _this23.onDialogError(); // Do nothing because session ends.
  
              }
            }
          });
        })["catch"](function () {
          onFailed();
        });
  
        function onSucceeded(response) {
          var _this24 = this;
  
          if (this._status === C.STATUS_TERMINATED) {
            return;
          }
  
          this.sendRequest(JsSIP_C.ACK); // If it is a 2XX retransmission exit now.
  
          if (succeeded) {
            return;
          } // Handle Session Timers.
  
  
          this._handleSessionTimersInIncomingResponse(response); // Must have SDP answer.
  
  
          if (!response.body) {
            onFailed.call(this);
            return;
          } else if (response.getHeader('Content-Type') !== 'application/sdp') {
            onFailed.call(this);
            return;
          }
  
          var e = {
            originator: 'remote',
            type: 'answer',
            sdp: response.body
          };
          debug('emit "sdp"');
          this.emit('sdp', e);
          var answer = new RTCSessionDescription({
            type: 'answer',
            sdp: e.sdp
          });
          this._connectionPromiseQueue = this._connectionPromiseQueue.then(function () {
            return _this24._connection.setRemoteDescription(answer);
          }).then(function () {
            if (eventHandlers.succeeded) {
              eventHandlers.succeeded(response);
            }
          })["catch"](function (error) {
            onFailed.call(_this24);
            debugerror('emit "peerconnection:setremotedescriptionfailed" [error:%o]', error);
  
            _this24.emit('peerconnection:setremotedescriptionfailed', error);
          });
        }
  
        function onFailed(response) {
          if (eventHandlers.failed) {
            eventHandlers.failed(response);
          }
        }
      }
      /**
       * Send UPDATE
       */
  
    }, {
      key: "_sendUpdate",
      value: function _sendUpdate() {
        var _this25 = this;
  
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
        debug('sendUpdate()');
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var eventHandlers = options.eventHandlers || {};
        var rtcOfferConstraints = options.rtcOfferConstraints || this._rtcOfferConstraints || null;
        var sdpOffer = options.sdpOffer || false;
        var succeeded = false;
        extraHeaders.push("Contact: ".concat(this._contact)); // Session Timers.
  
        if (this._sessionTimers.running) {
          extraHeaders.push("Session-Expires: ".concat(this._sessionTimers.currentExpires, ";refresher=").concat(this._sessionTimers.refresher ? 'uac' : 'uas'));
        }
  
        if (sdpOffer) {
          extraHeaders.push('Content-Type: application/sdp');
          this._connectionPromiseQueue = this._connectionPromiseQueue.then(function () {
            return _this25._createLocalDescription('offer', rtcOfferConstraints);
          }).then(function (sdp) {
            sdp = _this25._mangleOffer(sdp);
            var e = {
              originator: 'local',
              type: 'offer',
              sdp: sdp
            };
            debug('emit "sdp"');
  
            _this25.emit('sdp', e);
  
            _this25.sendRequest(JsSIP_C.UPDATE, {
              extraHeaders: extraHeaders,
              body: sdp,
              eventHandlers: {
                onSuccessResponse: function onSuccessResponse(response) {
                  onSucceeded.call(_this25, response);
                  succeeded = true;
                },
                onErrorResponse: function onErrorResponse(response) {
                  onFailed.call(_this25, response);
                },
                onTransportError: function onTransportError() {
                  _this25.onTransportError(); // Do nothing because session ends.
  
                },
                onRequestTimeout: function onRequestTimeout() {
                  _this25.onRequestTimeout(); // Do nothing because session ends.
  
                },
                onDialogError: function onDialogError() {
                  _this25.onDialogError(); // Do nothing because session ends.
  
                }
              }
            });
          })["catch"](function () {
            onFailed.call(_this25);
          });
        } // No SDP.
        else {
            this.sendRequest(JsSIP_C.UPDATE, {
              extraHeaders: extraHeaders,
              eventHandlers: {
                onSuccessResponse: function onSuccessResponse(response) {
                  onSucceeded.call(_this25, response);
                },
                onErrorResponse: function onErrorResponse(response) {
                  onFailed.call(_this25, response);
                },
                onTransportError: function onTransportError() {
                  _this25.onTransportError(); // Do nothing because session ends.
  
                },
                onRequestTimeout: function onRequestTimeout() {
                  _this25.onRequestTimeout(); // Do nothing because session ends.
  
                },
                onDialogError: function onDialogError() {
                  _this25.onDialogError(); // Do nothing because session ends.
  
                }
              }
            });
          }
  
        function onSucceeded(response) {
          var _this26 = this;
  
          if (this._status === C.STATUS_TERMINATED) {
            return;
          } // If it is a 2XX retransmission exit now.
  
  
          if (succeeded) {
            return;
          } // Handle Session Timers.
  
  
          this._handleSessionTimersInIncomingResponse(response); // Must have SDP answer.
  
  
          if (sdpOffer) {
            if (!response.body) {
              onFailed.call(this);
              return;
            } else if (response.getHeader('Content-Type') !== 'application/sdp') {
              onFailed.call(this);
              return;
            }
  
            var e = {
              originator: 'remote',
              type: 'answer',
              sdp: response.body
            };
            debug('emit "sdp"');
            this.emit('sdp', e);
            var answer = new RTCSessionDescription({
              type: 'answer',
              sdp: e.sdp
            });
            this._connectionPromiseQueue = this._connectionPromiseQueue.then(function () {
              return _this26._connection.setRemoteDescription(answer);
            }).then(function () {
              if (eventHandlers.succeeded) {
                eventHandlers.succeeded(response);
              }
            })["catch"](function (error) {
              onFailed.call(_this26);
              debugerror('emit "peerconnection:setremotedescriptionfailed" [error:%o]', error);
  
              _this26.emit('peerconnection:setremotedescriptionfailed', error);
            });
          } // No SDP answer.
          else if (eventHandlers.succeeded) {
              eventHandlers.succeeded(response);
            }
        }
  
        function onFailed(response) {
          if (eventHandlers.failed) {
            eventHandlers.failed(response);
          }
        }
      }
    }, {
      key: "_acceptAndTerminate",
      value: function _acceptAndTerminate(response, status_code, reason_phrase) {
        debug('acceptAndTerminate()');
        var extraHeaders = [];
  
        if (status_code) {
          reason_phrase = reason_phrase || JsSIP_C.REASON_PHRASE[status_code] || '';
          extraHeaders.push("Reason: SIP ;cause=".concat(status_code, "; text=\"").concat(reason_phrase, "\""));
        } // An error on dialog creation will fire 'failed' event.
  
  
        if (this._dialog || this._createDialog(response, 'UAC')) {
          this.sendRequest(JsSIP_C.ACK);
          this.sendRequest(JsSIP_C.BYE, {
            extraHeaders: extraHeaders
          });
        } // Update session status.
  
  
        this._status = C.STATUS_TERMINATED;
      }
      /**
       * Correctly set the SDP direction attributes if the call is on local hold
       */
  
    }, {
      key: "_mangleOffer",
      value: function _mangleOffer(sdp) {
        if (!this._localHold && !this._remoteHold) {
          return sdp;
        }
  
        sdp = sdp_transform.parse(sdp); // Local hold.
  
        if (this._localHold && !this._remoteHold) {
          debug('mangleOffer() | me on hold, mangling offer');
  
          var _iterator5 = _createForOfIteratorHelper(sdp.media),
              _step5;
  
          try {
            for (_iterator5.s(); !(_step5 = _iterator5.n()).done;) {
              var m = _step5.value;
  
              if (holdMediaTypes.indexOf(m.type) === -1) {
                continue;
              }
  
              if (!m.direction) {
                m.direction = 'sendonly';
              } else if (m.direction === 'sendrecv') {
                m.direction = 'sendonly';
              } else if (m.direction === 'recvonly') {
                m.direction = 'inactive';
              }
            }
          } catch (err) {
            _iterator5.e(err);
          } finally {
            _iterator5.f();
          }
        } // Local and remote hold.
        else if (this._localHold && this._remoteHold) {
            debug('mangleOffer() | both on hold, mangling offer');
  
            var _iterator6 = _createForOfIteratorHelper(sdp.media),
                _step6;
  
            try {
              for (_iterator6.s(); !(_step6 = _iterator6.n()).done;) {
                var _m = _step6.value;
  
                if (holdMediaTypes.indexOf(_m.type) === -1) {
                  continue;
                }
  
                _m.direction = 'inactive';
              }
            } catch (err) {
              _iterator6.e(err);
            } finally {
              _iterator6.f();
            }
          } // Remote hold.
          else if (this._remoteHold) {
              debug('mangleOffer() | remote on hold, mangling offer');
  
              var _iterator7 = _createForOfIteratorHelper(sdp.media),
                  _step7;
  
              try {
                for (_iterator7.s(); !(_step7 = _iterator7.n()).done;) {
                  var _m2 = _step7.value;
  
                  if (holdMediaTypes.indexOf(_m2.type) === -1) {
                    continue;
                  }
  
                  if (!_m2.direction) {
                    _m2.direction = 'recvonly';
                  } else if (_m2.direction === 'sendrecv') {
                    _m2.direction = 'recvonly';
                  } else if (_m2.direction === 'recvonly') {
                    _m2.direction = 'inactive';
                  }
                }
              } catch (err) {
                _iterator7.e(err);
              } finally {
                _iterator7.f();
              }
            }
  
        return sdp_transform.write(sdp);
      }
    }, {
      key: "_setLocalMediaStatus",
      value: function _setLocalMediaStatus() {
        var enableAudio = true,
            enableVideo = true;
  
        if (this._localHold || this._remoteHold) {
          enableAudio = false;
          enableVideo = false;
        }
  
        if (this._audioMuted) {
          enableAudio = false;
        }
  
        if (this._videoMuted) {
          enableVideo = false;
        }
  
        this._toggleMuteAudio(!enableAudio);
  
        this._toggleMuteVideo(!enableVideo);
      }
      /**
       * Handle SessionTimers for an incoming INVITE or UPDATE.
       * @param  {IncomingRequest} request
       * @param  {Array} responseExtraHeaders  Extra headers for the 200 response.
       */
  
    }, {
      key: "_handleSessionTimersInIncomingRequest",
      value: function _handleSessionTimersInIncomingRequest(request, responseExtraHeaders) {
        if (!this._sessionTimers.enabled) {
          return;
        }
  
        var session_expires_refresher;
  
        if (request.session_expires && request.session_expires >= JsSIP_C.MIN_SESSION_EXPIRES) {
          this._sessionTimers.currentExpires = request.session_expires;
          session_expires_refresher = request.session_expires_refresher || 'uas';
        } else {
          this._sessionTimers.currentExpires = this._sessionTimers.defaultExpires;
          session_expires_refresher = 'uas';
        }
  
        responseExtraHeaders.push("Session-Expires: ".concat(this._sessionTimers.currentExpires, ";refresher=").concat(session_expires_refresher));
        this._sessionTimers.refresher = session_expires_refresher === 'uas';
  
        this._runSessionTimer();
      }
      /**
       * Handle SessionTimers for an incoming response to INVITE or UPDATE.
       * @param  {IncomingResponse} response
       */
  
    }, {
      key: "_handleSessionTimersInIncomingResponse",
      value: function _handleSessionTimersInIncomingResponse(response) {
        if (!this._sessionTimers.enabled) {
          return;
        }
  
        var session_expires_refresher;
  
        if (response.session_expires && response.session_expires >= JsSIP_C.MIN_SESSION_EXPIRES) {
          this._sessionTimers.currentExpires = response.session_expires;
          session_expires_refresher = response.session_expires_refresher || 'uac';
        } else {
          this._sessionTimers.currentExpires = this._sessionTimers.defaultExpires;
          session_expires_refresher = 'uac';
        }
  
        this._sessionTimers.refresher = session_expires_refresher === 'uac';
  
        this._runSessionTimer();
      }
    }, {
      key: "_runSessionTimer",
      value: function _runSessionTimer() {
        var _this27 = this;
  
        var expires = this._sessionTimers.currentExpires;
        this._sessionTimers.running = true;
        clearTimeout(this._sessionTimers.timer); // I'm the refresher.
  
        if (this._sessionTimers.refresher) {
          this._sessionTimers.timer = setTimeout(function () {
            if (_this27._status === C.STATUS_TERMINATED) {
              return;
            }
  
            debug('runSessionTimer() | sending session refresh request');
  
            if (_this27._sessionTimers.refreshMethod === JsSIP_C.UPDATE) {
              _this27._sendUpdate();
            } else {
              _this27._sendReinvite();
            }
          }, expires * 500); // Half the given interval (as the RFC states).
        } // I'm not the refresher.
        else {
            this._sessionTimers.timer = setTimeout(function () {
              if (_this27._status === C.STATUS_TERMINATED) {
                return;
              }
  
              debugerror('runSessionTimer() | timer expired, terminating the session');
  
              _this27.terminate({
                cause: JsSIP_C.causes.REQUEST_TIMEOUT,
                status_code: 408,
                reason_phrase: 'Session Timer Expired'
              });
            }, expires * 1100);
          }
      }
    }, {
      key: "_toggleMuteAudio",
      value: function _toggleMuteAudio(mute) {
        var senders = this._connection.getSenders().filter(function (sender) {
          return sender.track && sender.track.kind === 'audio';
        });
  
        var _iterator8 = _createForOfIteratorHelper(senders),
            _step8;
  
        try {
          for (_iterator8.s(); !(_step8 = _iterator8.n()).done;) {
            var sender = _step8.value;
            sender.track.enabled = !mute;
          }
        } catch (err) {
          _iterator8.e(err);
        } finally {
          _iterator8.f();
        }
      }
    }, {
      key: "_toggleMuteVideo",
      value: function _toggleMuteVideo(mute) {
        var senders = this._connection.getSenders().filter(function (sender) {
          return sender.track && sender.track.kind === 'video';
        });
  
        var _iterator9 = _createForOfIteratorHelper(senders),
            _step9;
  
        try {
          for (_iterator9.s(); !(_step9 = _iterator9.n()).done;) {
            var sender = _step9.value;
            sender.track.enabled = !mute;
          }
        } catch (err) {
          _iterator9.e(err);
        } finally {
          _iterator9.f();
        }
      }
    }, {
      key: "_newRTCSession",
      value: function _newRTCSession(originator, request) {
        debug('newRTCSession()');
  
        this._ua.newRTCSession(this, {
          originator: originator,
          session: this,
          request: request
        });
      }
    }, {
      key: "_connecting",
      value: function _connecting(request) {
        debug('session connecting');
        debug('emit "connecting"');
        this.emit('connecting', {
          request: request
        });
      }
    }, {
      key: "_progress",
      value: function _progress(originator, response) {
        debug('session progress');
        debug('emit "progress"');
        this.emit('progress', {
          originator: originator,
          response: response || null
        });
      }
    }, {
      key: "_accepted",
      value: function _accepted(originator, message) {
        debug('session accepted');
        this._start_time = new Date();
        debug('emit "accepted"');
        this.emit('accepted', {
          originator: originator,
          response: message || null
        });
      }
    }, {
      key: "_confirmed",
      value: function _confirmed(originator, ack) {
        debug('session confirmed');
        this._is_confirmed = true;
        debug('emit "confirmed"');
        this.emit('confirmed', {
          originator: originator,
          ack: ack || null
        });
      }
    }, {
      key: "_ended",
      value: function _ended(originator, message, cause) {
        debug('session ended');
        this._end_time = new Date();
  
        this._close();
  
        debug('emit "ended"');
        this.emit('ended', {
          originator: originator,
          message: message || null,
          cause: cause
        });
      }
    }, {
      key: "_failed",
      value: function _failed(originator, message, cause) {
        debug('session failed'); // Emit private '_failed' event first.
  
        debug('emit "_failed"');
        this.emit('_failed', {
          originator: originator,
          message: message || null,
          cause: cause
        });
  
        this._close();
  
        debug('emit "failed"');
        this.emit('failed', {
          originator: originator,
          message: message || null,
          cause: cause
        });
      }
    }, {
      key: "_onhold",
      value: function _onhold(originator) {
        debug('session onhold');
  
        this._setLocalMediaStatus();
  
        debug('emit "hold"');
        this.emit('hold', {
          originator: originator
        });
      }
    }, {
      key: "_onunhold",
      value: function _onunhold(originator) {
        debug('session onunhold');
  
        this._setLocalMediaStatus();
  
        debug('emit "unhold"');
        this.emit('unhold', {
          originator: originator
        });
      }
    }, {
      key: "_onmute",
      value: function _onmute(_ref5) {
        var audio = _ref5.audio,
            video = _ref5.video;
        debug('session onmute');
  
        this._setLocalMediaStatus();
  
        debug('emit "muted"');
        this.emit('muted', {
          audio: audio,
          video: video
        });
      }
    }, {
      key: "_onunmute",
      value: function _onunmute(_ref6) {
        var audio = _ref6.audio,
            video = _ref6.video;
        debug('session onunmute');
  
        this._setLocalMediaStatus();
  
        debug('emit "unmuted"');
        this.emit('unmuted', {
          audio: audio,
          video: video
        });
      }
    }, {
      key: "C",
      get: function get() {
        return C;
      } // Expose session failed/ended causes as a property of the RTCSession instance.
  
    }, {
      key: "causes",
      get: function get() {
        return JsSIP_C.causes;
      }
    }, {
      key: "id",
      get: function get() {
        return this._id;
      }
    }, {
      key: "connection",
      get: function get() {
        return this._connection;
      }
    }, {
      key: "contact",
      get: function get() {
        return this._contact;
      }
    }, {
      key: "direction",
      get: function get() {
        return this._direction;
      }
    }, {
      key: "local_identity",
      get: function get() {
        return this._local_identity;
      }
    }, {
      key: "remote_identity",
      get: function get() {
        return this._remote_identity;
      }
    }, {
      key: "start_time",
      get: function get() {
        return this._start_time;
      }
    }, {
      key: "end_time",
      get: function get() {
        return this._end_time;
      }
    }, {
      key: "data",
      get: function get() {
        return this._data;
      },
      set: function set(_data) {
        this._data = _data;
      }
    }, {
      key: "status",
      get: function get() {
        return this._status;
      }
    }]);
  
    return RTCSession;
  }(EventEmitter);
  },{"./Constants":2,"./Dialog":3,"./Exceptions":6,"./RTCSession/DTMF":13,"./RTCSession/Info":14,"./RTCSession/ReferNotifier":15,"./RTCSession/ReferSubscriber":16,"./RequestSender":18,"./SIPMessage":19,"./Timers":21,"./Transactions":22,"./URI":25,"./Utils":26,"debug":30,"events":29,"sdp-transform":35}],13:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  var EventEmitter = require('events').EventEmitter;
  
  var JsSIP_C = require('../Constants');
  
  var Exceptions = require('../Exceptions');
  
  var Utils = require('../Utils');
  
  var debug = require('debug')('JsSIP:RTCSession:DTMF');
  
  var debugerror = require('debug')('JsSIP:ERROR:RTCSession:DTMF');
  
  debugerror.log = console.warn.bind(console);
  var C = {
    MIN_DURATION: 70,
    MAX_DURATION: 6000,
    DEFAULT_DURATION: 100,
    MIN_INTER_TONE_GAP: 50,
    DEFAULT_INTER_TONE_GAP: 500
  };
  
  module.exports = /*#__PURE__*/function (_EventEmitter) {
    _inherits(DTMF, _EventEmitter);
  
    var _super = _createSuper(DTMF);
  
    function DTMF(session) {
      var _this;
  
      _classCallCheck(this, DTMF);
  
      _this = _super.call(this);
      _this._session = session;
      _this._direction = null;
      _this._tone = null;
      _this._duration = null;
      _this._request = null;
      return _this;
    }
  
    _createClass(DTMF, [{
      key: "send",
      value: function send(tone) {
        var _this2 = this;
  
        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
  
        if (tone === undefined) {
          throw new TypeError('Not enough arguments');
        }
  
        this._direction = 'outgoing'; // Check RTCSession Status.
  
        if (this._session.status !== this._session.C.STATUS_CONFIRMED && this._session.status !== this._session.C.STATUS_WAITING_FOR_ACK) {
          throw new Exceptions.InvalidStateError(this._session.status);
        }
  
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        this.eventHandlers = options.eventHandlers || {}; // Check tone type.
  
        if (typeof tone === 'string') {
          tone = tone.toUpperCase();
        } else if (typeof tone === 'number') {
          tone = tone.toString();
        } else {
          throw new TypeError("Invalid tone: ".concat(tone));
        } // Check tone value.
  
  
        if (!tone.match(/^[0-9A-DR#*]$/)) {
          throw new TypeError("Invalid tone: ".concat(tone));
        } else {
          this._tone = tone;
        } // Duration is checked/corrected in RTCSession.
  
  
        this._duration = options.duration;
        extraHeaders.push('Content-Type: application/dtmf-relay');
        var body = "Signal=".concat(this._tone, "\r\n");
        body += "Duration=".concat(this._duration);
  
        this._session.newDTMF({
          originator: 'local',
          dtmf: this,
          request: this._request
        });
  
        this._session.sendRequest(JsSIP_C.INFO, {
          extraHeaders: extraHeaders,
          eventHandlers: {
            onSuccessResponse: function onSuccessResponse(response) {
              _this2.emit('succeeded', {
                originator: 'remote',
                response: response
              });
            },
            onErrorResponse: function onErrorResponse(response) {
              if (_this2.eventHandlers.onFailed) {
                _this2.eventHandlers.onFailed();
              }
  
              _this2.emit('failed', {
                originator: 'remote',
                response: response
              });
            },
            onRequestTimeout: function onRequestTimeout() {
              _this2._session.onRequestTimeout();
            },
            onTransportError: function onTransportError() {
              _this2._session.onTransportError();
            },
            onDialogError: function onDialogError() {
              _this2._session.onDialogError();
            }
          },
          body: body
        });
      }
    }, {
      key: "init_incoming",
      value: function init_incoming(request) {
        var reg_tone = /^(Signal\s*?=\s*?)([0-9A-D#*]{1})(\s)?.*/;
        var reg_duration = /^(Duration\s?=\s?)([0-9]{1,4})(\s)?.*/;
        this._direction = 'incoming';
        this._request = request;
        request.reply(200);
  
        if (request.body) {
          var body = request.body.split('\n');
  
          if (body.length >= 1) {
            if (reg_tone.test(body[0])) {
              this._tone = body[0].replace(reg_tone, '$2');
            }
          }
  
          if (body.length >= 2) {
            if (reg_duration.test(body[1])) {
              this._duration = parseInt(body[1].replace(reg_duration, '$2'), 10);
            }
          }
        }
  
        if (!this._duration) {
          this._duration = C.DEFAULT_DURATION;
        }
  
        if (!this._tone) {
          debug('invalid INFO DTMF received, discarded');
        } else {
          this._session.newDTMF({
            originator: 'remote',
            dtmf: this,
            request: request
          });
        }
      }
    }, {
      key: "tone",
      get: function get() {
        return this._tone;
      }
    }, {
      key: "duration",
      get: function get() {
        return this._duration;
      }
    }]);
  
    return DTMF;
  }(EventEmitter);
  /**
   * Expose C object.
   */
  
  
  module.exports.C = C;
  },{"../Constants":2,"../Exceptions":6,"../Utils":26,"debug":30,"events":29}],14:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  var EventEmitter = require('events').EventEmitter;
  
  var debugerror = require('debug')('JsSIP:ERROR:RTCSession:Info');
  
  debugerror.log = console.warn.bind(console);
  
  var JsSIP_C = require('../Constants');
  
  var Exceptions = require('../Exceptions');
  
  var Utils = require('../Utils');
  
  module.exports = /*#__PURE__*/function (_EventEmitter) {
    _inherits(Info, _EventEmitter);
  
    var _super = _createSuper(Info);
  
    function Info(session) {
      var _this;
  
      _classCallCheck(this, Info);
  
      _this = _super.call(this);
      _this._session = session;
      _this._direction = null;
      _this._contentType = null;
      _this._body = null;
      return _this;
    }
  
    _createClass(Info, [{
      key: "send",
      value: function send(contentType, body) {
        var _this2 = this;
  
        var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
        this._direction = 'outgoing';
  
        if (contentType === undefined) {
          throw new TypeError('Not enough arguments');
        } // Check RTCSession Status.
  
  
        if (this._session.status !== this._session.C.STATUS_CONFIRMED && this._session.status !== this._session.C.STATUS_WAITING_FOR_ACK) {
          throw new Exceptions.InvalidStateError(this._session.status);
        }
  
        this._contentType = contentType;
        this._body = body;
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        extraHeaders.push("Content-Type: ".concat(contentType));
  
        this._session.newInfo({
          originator: 'local',
          info: this,
          request: this.request
        });
  
        this._session.sendRequest(JsSIP_C.INFO, {
          extraHeaders: extraHeaders,
          eventHandlers: {
            onSuccessResponse: function onSuccessResponse(response) {
              _this2.emit('succeeded', {
                originator: 'remote',
                response: response
              });
            },
            onErrorResponse: function onErrorResponse(response) {
              _this2.emit('failed', {
                originator: 'remote',
                response: response
              });
            },
            onTransportError: function onTransportError() {
              _this2._session.onTransportError();
            },
            onRequestTimeout: function onRequestTimeout() {
              _this2._session.onRequestTimeout();
            },
            onDialogError: function onDialogError() {
              _this2._session.onDialogError();
            }
          },
          body: body
        });
      }
    }, {
      key: "init_incoming",
      value: function init_incoming(request) {
        this._direction = 'incoming';
        this.request = request;
        request.reply(200);
        this._contentType = request.getHeader('content-type');
        this._body = request.body;
  
        this._session.newInfo({
          originator: 'remote',
          info: this,
          request: request
        });
      }
    }, {
      key: "contentType",
      get: function get() {
        return this._contentType;
      }
    }, {
      key: "body",
      get: function get() {
        return this._body;
      }
    }]);
  
    return Info;
  }(EventEmitter);
  },{"../Constants":2,"../Exceptions":6,"../Utils":26,"debug":30,"events":29}],15:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var JsSIP_C = require('../Constants');
  
  var debug = require('debug')('JsSIP:RTCSession:ReferNotifier');
  
  var C = {
    event_type: 'refer',
    body_type: 'message/sipfrag;version=2.0',
    expires: 300
  };
  
  module.exports = /*#__PURE__*/function () {
    function ReferNotifier(session, id, expires) {
      _classCallCheck(this, ReferNotifier);
  
      this._session = session;
      this._id = id;
      this._expires = expires || C.expires;
      this._active = true; // The creation of a Notifier results in an immediate NOTIFY.
  
      this.notify(100);
    }
  
    _createClass(ReferNotifier, [{
      key: "notify",
      value: function notify(code, reason) {
        debug('notify()');
  
        if (this._active === false) {
          return;
        }
  
        reason = reason || JsSIP_C.REASON_PHRASE[code] || '';
        var state;
  
        if (code >= 200) {
          state = 'terminated;reason=noresource';
        } else {
          state = "active;expires=".concat(this._expires);
        } // Put this in a try/catch block.
  
  
        this._session.sendRequest(JsSIP_C.NOTIFY, {
          extraHeaders: ["Event: ".concat(C.event_type, ";id=").concat(this._id), "Subscription-State: ".concat(state), "Content-Type: ".concat(C.body_type)],
          body: "SIP/2.0 ".concat(code, " ").concat(reason),
          eventHandlers: {
            // If a negative response is received, subscription is canceled.
            onErrorResponse: function onErrorResponse() {
              this._active = false;
            }
          }
        });
      }
    }]);
  
    return ReferNotifier;
  }();
  },{"../Constants":2,"debug":30}],16:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  var EventEmitter = require('events').EventEmitter;
  
  var JsSIP_C = require('../Constants');
  
  var Grammar = require('../Grammar');
  
  var Utils = require('../Utils');
  
  var debug = require('debug')('JsSIP:RTCSession:ReferSubscriber');
  
  module.exports = /*#__PURE__*/function (_EventEmitter) {
    _inherits(ReferSubscriber, _EventEmitter);
  
    var _super = _createSuper(ReferSubscriber);
  
    function ReferSubscriber(session) {
      var _this;
  
      _classCallCheck(this, ReferSubscriber);
  
      _this = _super.call(this);
      _this._id = null;
      _this._session = session;
      return _this;
    }
  
    _createClass(ReferSubscriber, [{
      key: "sendRefer",
      value: function sendRefer(target) {
        var _this2 = this;
  
        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
        debug('sendRefer()');
        var extraHeaders = Utils.cloneArray(options.extraHeaders);
        var eventHandlers = options.eventHandlers || {}; // Set event handlers.
  
        for (var event in eventHandlers) {
          if (Object.prototype.hasOwnProperty.call(eventHandlers, event)) {
            this.on(event, eventHandlers[event]);
          }
        } // Replaces URI header field.
  
  
        var replaces = null;
  
        if (options.replaces) {
          replaces = options.replaces._request.call_id;
          replaces += ";to-tag=".concat(options.replaces._to_tag);
          replaces += ";from-tag=".concat(options.replaces._from_tag);
          replaces = encodeURIComponent(replaces);
        } // Refer-To header field.
  
  
        var referTo = "Refer-To: <".concat(target).concat(replaces ? "?Replaces=".concat(replaces) : '', ">");
        extraHeaders.push(referTo); // Referred-By header field.
  
        var referredBy = "Referred-By: <".concat(this._session._ua._configuration.uri._scheme, ":").concat(this._session._ua._configuration.uri._user, "@").concat(this._session._ua._configuration.uri._host, ">");
        extraHeaders.push(referredBy);
        extraHeaders.push("Contact: ".concat(this._session.contact));
  
        var request = this._session.sendRequest(JsSIP_C.REFER, {
          extraHeaders: extraHeaders,
          eventHandlers: {
            onSuccessResponse: function onSuccessResponse(response) {
              _this2._requestSucceeded(response);
            },
            onErrorResponse: function onErrorResponse(response) {
              _this2._requestFailed(response, JsSIP_C.causes.REJECTED);
            },
            onTransportError: function onTransportError() {
              _this2._requestFailed(null, JsSIP_C.causes.CONNECTION_ERROR);
            },
            onRequestTimeout: function onRequestTimeout() {
              _this2._requestFailed(null, JsSIP_C.causes.REQUEST_TIMEOUT);
            },
            onDialogError: function onDialogError() {
              _this2._requestFailed(null, JsSIP_C.causes.DIALOG_ERROR);
            }
          }
        });
  
        this._id = request.cseq;
      }
    }, {
      key: "receiveNotify",
      value: function receiveNotify(request) {
        debug('receiveNotify()');
  
        if (!request.body) {
          return;
        }
  
        var status_line = Grammar.parse(request.body.trim(), 'Status_Line');
  
        if (status_line === -1) {
          debug("receiveNotify() | error parsing NOTIFY body: \"".concat(request.body, "\""));
          return;
        }
  
        switch (true) {
          case /^100$/.test(status_line.status_code):
            this.emit('trying', {
              request: request,
              status_line: status_line
            });
            break;
  
          case /^1[0-9]{2}$/.test(status_line.status_code):
            this.emit('progress', {
              request: request,
              status_line: status_line
            });
            break;
  
          case /^2[0-9]{2}$/.test(status_line.status_code):
            this.emit('accepted', {
              request: request,
              status_line: status_line
            });
            break;
  
          default:
            this.emit('failed', {
              request: request,
              status_line: status_line
            });
            break;
        }
      }
    }, {
      key: "_requestSucceeded",
      value: function _requestSucceeded(response) {
        debug('REFER succeeded');
        debug('emit "requestSucceeded"');
        this.emit('requestSucceeded', {
          response: response
        });
      }
    }, {
      key: "_requestFailed",
      value: function _requestFailed(response, cause) {
        debug('REFER failed');
        debug('emit "requestFailed"');
        this.emit('requestFailed', {
          response: response || null,
          cause: cause
        });
      }
    }, {
      key: "id",
      get: function get() {
        return this._id;
      }
    }]);
  
    return ReferSubscriber;
  }(EventEmitter);
  },{"../Constants":2,"../Grammar":7,"../Utils":26,"debug":30,"events":29}],17:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var Utils = require('./Utils');
  
  var JsSIP_C = require('./Constants');
  
  var SIPMessage = require('./SIPMessage');
  
  var RequestSender = require('./RequestSender');
  
  var debug = require('debug')('JsSIP:Registrator');
  
  var MIN_REGISTER_EXPIRES = 10; // In seconds.
  
  module.exports = /*#__PURE__*/function () {
    function Registrator(ua, transport) {
      _classCallCheck(this, Registrator);
  
      var reg_id = 1; // Force reg_id to 1.
  
      this._ua = ua;
      this._transport = transport;
      this._registrar = ua.configuration.registrar_server;
      this._expires = ua.configuration.register_expires; // Call-ID and CSeq values RFC3261 10.2.
  
      this._call_id = Utils.createRandomToken(22);
      this._cseq = 0;
      this._to_uri = ua.configuration.uri;
      this._registrationTimer = null; // Ongoing Register request.
  
      this._registering = false; // Set status.
  
      this._registered = false; // Contact header.
  
      this._contact = this._ua.contact.toString(); // Sip.ice media feature tag (RFC 5768).
  
      this._contact += ';+sip.ice'; // Custom headers for REGISTER and un-REGISTER.
  
      this._extraHeaders = []; // Custom Contact header params for REGISTER and un-REGISTER.
  
      this._extraContactParams = '';
  
      if (reg_id) {
        this._contact += ";reg-id=".concat(reg_id);
        this._contact += ";+sip.instance=\"<urn:uuid:".concat(this._ua.configuration.instance_id, ">\"");
      }
    }
  
    _createClass(Registrator, [{
      key: "setExtraHeaders",
      value: function setExtraHeaders(extraHeaders) {
        if (!Array.isArray(extraHeaders)) {
          extraHeaders = [];
        }
  
        this._extraHeaders = extraHeaders.slice();
      }
    }, {
      key: "setExtraContactParams",
      value: function setExtraContactParams(extraContactParams) {
        if (!(extraContactParams instanceof Object)) {
          extraContactParams = {};
        } // Reset it.
  
  
        this._extraContactParams = '';
  
        for (var param_key in extraContactParams) {
          if (Object.prototype.hasOwnProperty.call(extraContactParams, param_key)) {
            var param_value = extraContactParams[param_key];
            this._extraContactParams += ";".concat(param_key);
  
            if (param_value) {
              this._extraContactParams += "=".concat(param_value);
            }
          }
        }
      }
    }, {
      key: "register",
      value: function register() {
        var _this = this;
  
        if (this._registering) {
          debug('Register request in progress...');
          return;
        }
  
        var extraHeaders = this._extraHeaders.slice();
  
        extraHeaders.push("Contact: ".concat(this._contact, ";expires=").concat(this._expires).concat(this._extraContactParams));
        extraHeaders.push("Expires: ".concat(this._expires));
        var request = new SIPMessage.OutgoingRequest(JsSIP_C.REGISTER, this._registrar, this._ua, {
          'to_uri': this._to_uri,
          'call_id': this._call_id,
          'cseq': this._cseq += 1
        }, extraHeaders);
        var request_sender = new RequestSender(this._ua, request, {
          onRequestTimeout: function onRequestTimeout() {
            _this._registrationFailure(null, JsSIP_C.causes.REQUEST_TIMEOUT);
          },
          onTransportError: function onTransportError() {
            _this._registrationFailure(null, JsSIP_C.causes.CONNECTION_ERROR);
          },
          // Increase the CSeq on authentication.
          onAuthenticated: function onAuthenticated() {
            _this._cseq += 1;
          },
          onReceiveResponse: function onReceiveResponse(response) {
            // Discard responses to older REGISTER/un-REGISTER requests.
            if (response.cseq !== _this._cseq) {
              return;
            } // Clear registration timer.
  
  
            if (_this._registrationTimer !== null) {
              clearTimeout(_this._registrationTimer);
              _this._registrationTimer = null;
            }
  
            switch (true) {
              case /^1[0-9]{2}$/.test(response.status_code):
                {
                  // Ignore provisional responses.
                  break;
                }
  
              case /^2[0-9]{2}$/.test(response.status_code):
                {
                  _this._registering = false;
  
                  if (!response.hasHeader('Contact')) {
                    debug('no Contact header in response to REGISTER, response ignored');
                    break;
                  }
  
                  var contacts = response.headers['Contact'].reduce(function (a, b) {
                    return a.concat(b.parsed);
                  }, []); // Get the Contact pointing to us and update the expires value accordingly.
  
                  var contact = contacts.find(function (element) {
                    return element.uri.user === _this._ua.contact.uri.user;
                  });
  
                  if (!contact) {
                    debug('no Contact header pointing to us, response ignored');
                    break;
                  }
  
                  var expires = contact.getParam('expires');
  
                  if (!expires && response.hasHeader('expires')) {
                    expires = response.getHeader('expires');
                  }
  
                  if (!expires) {
                    expires = _this._expires;
                  }
  
                  expires = Number(expires);
                  if (expires < MIN_REGISTER_EXPIRES) expires = MIN_REGISTER_EXPIRES; // Re-Register or emit an event before the expiration interval has elapsed.
                  // For that, decrease the expires value. ie: 3 seconds.
  
                  _this._registrationTimer = setTimeout(function () {
                    _this._registrationTimer = null; // If there are no listeners for registrationExpiring, renew registration.
                    // If there are listeners, let the function listening do the register call.
  
                    if (_this._ua.listeners('registrationExpiring').length === 0) {
                      _this.register();
                    } else {
                      _this._ua.emit('registrationExpiring');
                    }
                  }, expires * 1000 - 5000); // Save gruu values.
  
                  if (contact.hasParam('temp-gruu')) {
                    _this._ua.contact.temp_gruu = contact.getParam('temp-gruu').replace(/"/g, '');
                  }
  
                  if (contact.hasParam('pub-gruu')) {
                    _this._ua.contact.pub_gruu = contact.getParam('pub-gruu').replace(/"/g, '');
                  }
  
                  if (!_this._registered) {
                    _this._registered = true;
  
                    _this._ua.registered({
                      response: response
                    });
                  }
  
                  break;
                }
              // Interval too brief RFC3261 10.2.8.
  
              case /^423$/.test(response.status_code):
                {
                  if (response.hasHeader('min-expires')) {
                    // Increase our registration interval to the suggested minimum.
                    _this._expires = Number(response.getHeader('min-expires'));
                    if (_this._expires < MIN_REGISTER_EXPIRES) _this._expires = MIN_REGISTER_EXPIRES; // Attempt the registration again immediately.
  
                    _this.register();
                  } else {
                    // This response MUST contain a Min-Expires header field.
                    debug('423 response received for REGISTER without Min-Expires');
  
                    _this._registrationFailure(response, JsSIP_C.causes.SIP_FAILURE_CODE);
                  }
  
                  break;
                }
  
              default:
                {
                  var cause = Utils.sipErrorCause(response.status_code);
  
                  _this._registrationFailure(response, cause);
                }
            }
          }
        });
        this._registering = true;
        request_sender.send();
      }
    }, {
      key: "unregister",
      value: function unregister() {
        var _this2 = this;
  
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  
        if (!this._registered) {
          debug('already unregistered');
          return;
        }
  
        this._registered = false; // Clear the registration timer.
  
        if (this._registrationTimer !== null) {
          clearTimeout(this._registrationTimer);
          this._registrationTimer = null;
        }
  
        var extraHeaders = this._extraHeaders.slice();
  
        if (options.all) {
          extraHeaders.push("Contact: *".concat(this._extraContactParams));
        } else {
          extraHeaders.push("Contact: ".concat(this._contact, ";expires=0").concat(this._extraContactParams));
        }
  
        extraHeaders.push('Expires: 0');
        var request = new SIPMessage.OutgoingRequest(JsSIP_C.REGISTER, this._registrar, this._ua, {
          'to_uri': this._to_uri,
          'call_id': this._call_id,
          'cseq': this._cseq += 1
        }, extraHeaders);
        var request_sender = new RequestSender(this._ua, request, {
          onRequestTimeout: function onRequestTimeout() {
            _this2._unregistered(null, JsSIP_C.causes.REQUEST_TIMEOUT);
          },
          onTransportError: function onTransportError() {
            _this2._unregistered(null, JsSIP_C.causes.CONNECTION_ERROR);
          },
          // Increase the CSeq on authentication.
          onAuthenticated: function onAuthenticated() {
            _this2._cseq += 1;
          },
          onReceiveResponse: function onReceiveResponse(response) {
            switch (true) {
              case /^1[0-9]{2}$/.test(response.status_code):
                // Ignore provisional responses.
                break;
  
              case /^2[0-9]{2}$/.test(response.status_code):
                _this2._unregistered(response);
  
                break;
  
              default:
                {
                  var cause = Utils.sipErrorCause(response.status_code);
  
                  _this2._unregistered(response, cause);
                }
            }
          }
        });
        request_sender.send();
      }
    }, {
      key: "close",
      value: function close() {
        if (this._registered) {
          this.unregister();
        }
      }
    }, {
      key: "onTransportClosed",
      value: function onTransportClosed() {
        this._registering = false;
  
        if (this._registrationTimer !== null) {
          clearTimeout(this._registrationTimer);
          this._registrationTimer = null;
        }
  
        if (this._registered) {
          this._registered = false;
  
          this._ua.unregistered({});
        }
      }
    }, {
      key: "_registrationFailure",
      value: function _registrationFailure(response, cause) {
        this._registering = false;
  
        this._ua.registrationFailed({
          response: response || null,
          cause: cause
        });
  
        if (this._registered) {
          this._registered = false;
  
          this._ua.unregistered({
            response: response || null,
            cause: cause
          });
        }
      }
    }, {
      key: "_unregistered",
      value: function _unregistered(response, cause) {
        this._registering = false;
        this._registered = false;
  
        this._ua.unregistered({
          response: response || null,
          cause: cause || null
        });
      }
    }, {
      key: "registered",
      get: function get() {
        return this._registered;
      }
    }]);
  
    return Registrator;
  }();
  },{"./Constants":2,"./RequestSender":18,"./SIPMessage":19,"./Utils":26,"debug":30}],18:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var JsSIP_C = require('./Constants');
  
  var DigestAuthentication = require('./DigestAuthentication');
  
  var Transactions = require('./Transactions');
  
  var debug = require('debug')('JsSIP:RequestSender'); // Default event handlers.
  
  
  var EventHandlers = {
    onRequestTimeout: function onRequestTimeout() {},
    onTransportError: function onTransportError() {},
    onReceiveResponse: function onReceiveResponse() {},
    onAuthenticated: function onAuthenticated() {}
  };
  
  module.exports = /*#__PURE__*/function () {
    function RequestSender(ua, request, eventHandlers) {
      _classCallCheck(this, RequestSender);
  
      this._ua = ua;
      this._eventHandlers = eventHandlers;
      this._method = request.method;
      this._request = request;
      this._auth = null;
      this._challenged = false;
      this._staled = false; // Define the undefined handlers.
  
      for (var handler in EventHandlers) {
        if (Object.prototype.hasOwnProperty.call(EventHandlers, handler)) {
          if (!this._eventHandlers[handler]) {
            this._eventHandlers[handler] = EventHandlers[handler];
          }
        }
      } // If ua is in closing process or even closed just allow sending Bye and ACK.
  
  
      if (ua.status === ua.C.STATUS_USER_CLOSED && (this._method !== JsSIP_C.BYE || this._method !== JsSIP_C.ACK)) {
        this._eventHandlers.onTransportError();
      }
    }
    /**
    * Create the client transaction and send the message.
    */
  
  
    _createClass(RequestSender, [{
      key: "send",
      value: function send() {
        var _this = this;
  
        var eventHandlers = {
          onRequestTimeout: function onRequestTimeout() {
            _this._eventHandlers.onRequestTimeout();
          },
          onTransportError: function onTransportError() {
            _this._eventHandlers.onTransportError();
          },
          onReceiveResponse: function onReceiveResponse(response) {
            _this._receiveResponse(response);
          }
        };
  
        switch (this._method) {
          case 'INVITE':
            this.clientTransaction = new Transactions.InviteClientTransaction(this._ua, this._ua.transport, this._request, eventHandlers);
            break;
  
          case 'ACK':
            this.clientTransaction = new Transactions.AckClientTransaction(this._ua, this._ua.transport, this._request, eventHandlers);
            break;
  
          default:
            this.clientTransaction = new Transactions.NonInviteClientTransaction(this._ua, this._ua.transport, this._request, eventHandlers);
        } // If authorization JWT is present, use it.
  
  
        if (this._ua._configuration.authorization_jwt) {
          this._request.headers.Authorization = ["Bearer ".concat(this._ua._configuration.authorization_jwt)];
        }
  
        this.clientTransaction.send();
      }
      /**
      * Called from client transaction when receiving a correct response to the request.
      * Authenticate request if needed or pass the response back to the applicant.
      */
  
    }, {
      key: "_receiveResponse",
      value: function _receiveResponse(response) {
        var challenge;
        var authorization_header_name;
        var status_code = response.status_code;
        /*
        * Authentication
        * Authenticate once. _challenged_ flag used to avoid infinite authentications.
        */
  
        if ((status_code === 401 || status_code === 407) && (this._ua.configuration.password !== null || this._ua.configuration.ha1 !== null)) {
          // Get and parse the appropriate WWW-Authenticate or Proxy-Authenticate header.
          if (response.status_code === 401) {
            challenge = response.parseHeader('www-authenticate');
            authorization_header_name = 'authorization';
          } else {
            challenge = response.parseHeader('proxy-authenticate');
            authorization_header_name = 'proxy-authorization';
          } // Verify it seems a valid challenge.
  
  
          if (!challenge) {
            debug("".concat(response.status_code, " with wrong or missing challenge, cannot authenticate"));
  
            this._eventHandlers.onReceiveResponse(response);
  
            return;
          }
  
          if (!this._challenged || !this._staled && challenge.stale === true) {
            if (!this._auth) {
              this._auth = new DigestAuthentication({
                username: this._ua.configuration.authorization_user,
                password: this._ua.configuration.password,
                realm: this._ua.configuration.realm,
                ha1: this._ua.configuration.ha1
              });
            } // Verify that the challenge is really valid.
  
  
            if (!this._auth.authenticate(this._request, challenge)) {
              this._eventHandlers.onReceiveResponse(response);
  
              return;
            }
  
            this._challenged = true; // Update ha1 and realm in the UA.
  
            this._ua.set('realm', this._auth.get('realm'));
  
            this._ua.set('ha1', this._auth.get('ha1'));
  
            if (challenge.stale) {
              this._staled = true;
            }
  
            this._request = this._request.clone();
            this._request.cseq += 1;
  
            this._request.setHeader('cseq', "".concat(this._request.cseq, " ").concat(this._method));
  
            this._request.setHeader(authorization_header_name, this._auth.toString());
  
            this._eventHandlers.onAuthenticated(this._request);
  
            this.send();
          } else {
            this._eventHandlers.onReceiveResponse(response);
          }
        } else {
          this._eventHandlers.onReceiveResponse(response);
        }
      }
    }]);
  
    return RequestSender;
  }();
  },{"./Constants":2,"./DigestAuthentication":5,"./Transactions":22,"debug":30}],19:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var it, normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var sdp_transform = require('sdp-transform');
  
  var JsSIP_C = require('./Constants');
  
  var Utils = require('./Utils');
  
  var NameAddrHeader = require('./NameAddrHeader');
  
  var Grammar = require('./Grammar');
  
  var debug = require('debug')('JsSIP:SIPMessage');
  /**
   * -param {String} method request method
   * -param {String} ruri request uri
   * -param {UA} ua
   * -param {Object} params parameters that will have priority over ua.configuration parameters:
   * <br>
   *  - cseq, call_id, from_tag, from_uri, from_display_name, to_uri, to_tag, route_set
   * -param {Object} [headers] extra headers
   * -param {String} [body]
   */
  
  
  var OutgoingRequest = /*#__PURE__*/function () {
    function OutgoingRequest(method, ruri, ua, params, extraHeaders, body) {
      _classCallCheck(this, OutgoingRequest);
  
      // Mandatory parameters check.
      if (!method || !ruri || !ua) {
        return null;
      }
  
      params = params || {};
      this.ua = ua;
      this.headers = {};
      this.method = method;
      this.ruri = ruri;
      this.body = body;
      this.extraHeaders = Utils.cloneArray(extraHeaders); // Fill the Common SIP Request Headers.
      // Route.
  
      if (params.route_set) {
        this.setHeader('route', params.route_set);
      } else if (ua.configuration.use_preloaded_route) {
        this.setHeader('route', "<".concat(ua.transport.sip_uri, ";lr>"));
      } // Via.
      // Empty Via header. Will be filled by the client transaction.
  
  
      this.setHeader('via', ''); // Max-Forwards.
  
      this.setHeader('max-forwards', JsSIP_C.MAX_FORWARDS); // To
  
      var to_uri = params.to_uri || ruri;
      var to_params = params.to_tag ? {
        tag: params.to_tag
      } : null;
      var to_display_name = typeof params.to_display_name !== 'undefined' ? params.to_display_name : null;
      this.to = new NameAddrHeader(to_uri, to_display_name, to_params);
      this.setHeader('to', this.to.toString()); // From.
  
      var from_uri = params.from_uri || ua.configuration.uri;
      var from_params = {
        tag: params.from_tag || Utils.newTag()
      };
      var display_name;
  
      if (typeof params.from_display_name !== 'undefined') {
        display_name = params.from_display_name;
      } else if (ua.configuration.display_name) {
        display_name = ua.configuration.display_name;
      } else {
        display_name = null;
      }
  
      this.from = new NameAddrHeader(from_uri, display_name, from_params);
      this.setHeader('from', this.from.toString()); // Call-ID.
  
      var call_id = params.call_id || ua.configuration.jssip_id + Utils.createRandomToken(15);
      this.call_id = call_id;
      this.setHeader('call-id', call_id); // CSeq.
  
      var cseq = params.cseq || Math.floor(Math.random() * 10000);
      this.cseq = cseq;
      this.setHeader('cseq', "".concat(cseq, " ").concat(method));
    }
    /**
     * Replace the the given header by the given value.
     * -param {String} name header name
     * -param {String | Array} value header value
     */
  
  
    _createClass(OutgoingRequest, [{
      key: "setHeader",
      value: function setHeader(name, value) {
        // Remove the header from extraHeaders if present.
        var regexp = new RegExp("^\\s*".concat(name, "\\s*:"), 'i');
  
        for (var idx = 0; idx < this.extraHeaders.length; idx++) {
          if (regexp.test(this.extraHeaders[idx])) {
            this.extraHeaders.splice(idx, 1);
          }
        }
  
        this.headers[Utils.headerize(name)] = Array.isArray(value) ? value : [value];
      }
      /**
       * Get the value of the given header name at the given position.
       * -param {String} name header name
       * -returns {String|undefined} Returns the specified header, null if header doesn't exist.
       */
  
    }, {
      key: "getHeader",
      value: function getHeader(name) {
        var headers = this.headers[Utils.headerize(name)];
  
        if (headers) {
          if (headers[0]) {
            return headers[0];
          }
        } else {
          var regexp = new RegExp("^\\s*".concat(name, "\\s*:"), 'i');
  
          var _iterator = _createForOfIteratorHelper(this.extraHeaders),
              _step;
  
          try {
            for (_iterator.s(); !(_step = _iterator.n()).done;) {
              var header = _step.value;
  
              if (regexp.test(header)) {
                return header.substring(header.indexOf(':') + 1).trim();
              }
            }
          } catch (err) {
            _iterator.e(err);
          } finally {
            _iterator.f();
          }
        }
  
        return;
      }
      /**
       * Get the header/s of the given name.
       * -param {String} name header name
       * -returns {Array} Array with all the headers of the specified name.
       */
  
    }, {
      key: "getHeaders",
      value: function getHeaders(name) {
        var headers = this.headers[Utils.headerize(name)];
        var result = [];
  
        if (headers) {
          var _iterator2 = _createForOfIteratorHelper(headers),
              _step2;
  
          try {
            for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
              var header = _step2.value;
              result.push(header);
            }
          } catch (err) {
            _iterator2.e(err);
          } finally {
            _iterator2.f();
          }
  
          return result;
        } else {
          var regexp = new RegExp("^\\s*".concat(name, "\\s*:"), 'i');
  
          var _iterator3 = _createForOfIteratorHelper(this.extraHeaders),
              _step3;
  
          try {
            for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
              var _header = _step3.value;
  
              if (regexp.test(_header)) {
                result.push(_header.substring(_header.indexOf(':') + 1).trim());
              }
            }
          } catch (err) {
            _iterator3.e(err);
          } finally {
            _iterator3.f();
          }
  
          return result;
        }
      }
      /**
       * Verify the existence of the given header.
       * -param {String} name header name
       * -returns {boolean} true if header with given name exists, false otherwise
       */
  
    }, {
      key: "hasHeader",
      value: function hasHeader(name) {
        if (this.headers[Utils.headerize(name)]) {
          return true;
        } else {
          var regexp = new RegExp("^\\s*".concat(name, "\\s*:"), 'i');
  
          var _iterator4 = _createForOfIteratorHelper(this.extraHeaders),
              _step4;
  
          try {
            for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
              var header = _step4.value;
  
              if (regexp.test(header)) {
                return true;
              }
            }
          } catch (err) {
            _iterator4.e(err);
          } finally {
            _iterator4.f();
          }
        }
  
        return false;
      }
      /**
       * Parse the current body as a SDP and store the resulting object
       * into this.sdp.
       * -param {Boolean} force: Parse even if this.sdp already exists.
       *
       * Returns this.sdp.
       */
  
    }, {
      key: "parseSDP",
      value: function parseSDP(force) {
        if (!force && this.sdp) {
          return this.sdp;
        } else {
          this.sdp = sdp_transform.parse(this.body || '');
          return this.sdp;
        }
      }
    }, {
      key: "toString",
      value: function toString() {
        var msg = "".concat(this.method, " ").concat(this.ruri, " SIP/2.0\r\n");
  
        for (var headerName in this.headers) {
          if (Object.prototype.hasOwnProperty.call(this.headers, headerName)) {
            var _iterator5 = _createForOfIteratorHelper(this.headers[headerName]),
                _step5;
  
            try {
              for (_iterator5.s(); !(_step5 = _iterator5.n()).done;) {
                var headerValue = _step5.value;
                msg += "".concat(headerName, ": ").concat(headerValue, "\r\n");
              }
            } catch (err) {
              _iterator5.e(err);
            } finally {
              _iterator5.f();
            }
          }
        }
  
        var _iterator6 = _createForOfIteratorHelper(this.extraHeaders),
            _step6;
  
        try {
          for (_iterator6.s(); !(_step6 = _iterator6.n()).done;) {
            var header = _step6.value;
            msg += "".concat(header.trim(), "\r\n");
          } // Supported.
  
        } catch (err) {
          _iterator6.e(err);
        } finally {
          _iterator6.f();
        }
  
        var supported = [];
  
        switch (this.method) {
          case JsSIP_C.REGISTER:
            supported.push('path', 'gruu');
            break;
  
          case JsSIP_C.INVITE:
            if (this.ua.configuration.session_timers) {
              supported.push('timer');
            }
  
            if (this.ua.contact.pub_gruu || this.ua.contact.temp_gruu) {
              supported.push('gruu');
            }
  
            supported.push('ice', 'replaces');
            break;
  
          case JsSIP_C.UPDATE:
            if (this.ua.configuration.session_timers) {
              supported.push('timer');
            }
  
            supported.push('ice');
            break;
        }
  
        supported.push('outbound');
        var userAgent = this.ua.configuration.user_agent || JsSIP_C.USER_AGENT; // Allow.
  
        msg += "Allow: ".concat(JsSIP_C.ALLOWED_METHODS, "\r\n");
        msg += "Supported: ".concat(supported, "\r\n");
        msg += "User-Agent: ".concat(userAgent, "\r\n");
  
        if (this.body) {
          var length = Utils.str_utf8_length(this.body);
          msg += "Content-Length: ".concat(length, "\r\n\r\n");
          msg += this.body;
        } else {
          msg += 'Content-Length: 0\r\n\r\n';
        }
  
        return msg;
      }
    }, {
      key: "clone",
      value: function clone() {
        var request = new OutgoingRequest(this.method, this.ruri, this.ua);
        Object.keys(this.headers).forEach(function (name) {
          request.headers[name] = this.headers[name].slice();
        }, this);
        request.body = this.body;
        request.extraHeaders = Utils.cloneArray(this.extraHeaders);
        request.to = this.to;
        request.from = this.from;
        request.call_id = this.call_id;
        request.cseq = this.cseq;
        return request;
      }
    }]);
  
    return OutgoingRequest;
  }();
  
  var InitialOutgoingInviteRequest = /*#__PURE__*/function (_OutgoingRequest) {
    _inherits(InitialOutgoingInviteRequest, _OutgoingRequest);
  
    var _super = _createSuper(InitialOutgoingInviteRequest);
  
    function InitialOutgoingInviteRequest(ruri, ua, params, extraHeaders, body) {
      var _this;
  
      _classCallCheck(this, InitialOutgoingInviteRequest);
  
      _this = _super.call(this, JsSIP_C.INVITE, ruri, ua, params, extraHeaders, body);
      _this.transaction = null;
      return _this;
    }
  
    _createClass(InitialOutgoingInviteRequest, [{
      key: "cancel",
      value: function cancel(reason) {
        this.transaction.cancel(reason);
      }
    }, {
      key: "clone",
      value: function clone() {
        var request = new InitialOutgoingInviteRequest(this.ruri, this.ua);
        Object.keys(this.headers).forEach(function (name) {
          request.headers[name] = this.headers[name].slice();
        }, this);
        request.body = this.body;
        request.extraHeaders = Utils.cloneArray(this.extraHeaders);
        request.to = this.to;
        request.from = this.from;
        request.call_id = this.call_id;
        request.cseq = this.cseq;
        request.transaction = this.transaction;
        return request;
      }
    }]);
  
    return InitialOutgoingInviteRequest;
  }(OutgoingRequest);
  
  var IncomingMessage = /*#__PURE__*/function () {
    function IncomingMessage() {
      _classCallCheck(this, IncomingMessage);
  
      this.data = null;
      this.headers = null;
      this.method = null;
      this.via = null;
      this.via_branch = null;
      this.call_id = null;
      this.cseq = null;
      this.from = null;
      this.from_tag = null;
      this.to = null;
      this.to_tag = null;
      this.body = null;
      this.sdp = null;
    }
    /**
    * Insert a header of the given name and value into the last position of the
    * header array.
    */
  
  
    _createClass(IncomingMessage, [{
      key: "addHeader",
      value: function addHeader(name, value) {
        var header = {
          raw: value
        };
        name = Utils.headerize(name);
  
        if (this.headers[name]) {
          this.headers[name].push(header);
        } else {
          this.headers[name] = [header];
        }
      }
      /**
       * Get the value of the given header name at the given position.
       */
  
    }, {
      key: "getHeader",
      value: function getHeader(name) {
        var header = this.headers[Utils.headerize(name)];
  
        if (header) {
          if (header[0]) {
            return header[0].raw;
          }
        } else {
          return;
        }
      }
      /**
       * Get the header/s of the given name.
       */
  
    }, {
      key: "getHeaders",
      value: function getHeaders(name) {
        var headers = this.headers[Utils.headerize(name)];
        var result = [];
  
        if (!headers) {
          return [];
        }
  
        var _iterator7 = _createForOfIteratorHelper(headers),
            _step7;
  
        try {
          for (_iterator7.s(); !(_step7 = _iterator7.n()).done;) {
            var header = _step7.value;
            result.push(header.raw);
          }
        } catch (err) {
          _iterator7.e(err);
        } finally {
          _iterator7.f();
        }
  
        return result;
      }
      /**
       * Verify the existence of the given header.
       */
  
    }, {
      key: "hasHeader",
      value: function hasHeader(name) {
        return this.headers[Utils.headerize(name)] ? true : false;
      }
      /**
      * Parse the given header on the given index.
      * -param {String} name header name
      * -param {Number} [idx=0] header index
      * -returns {Object|undefined} Parsed header object, undefined if the header
      *  is not present or in case of a parsing error.
      */
  
    }, {
      key: "parseHeader",
      value: function parseHeader(name) {
        var idx = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
        name = Utils.headerize(name);
  
        if (!this.headers[name]) {
          debug("header \"".concat(name, "\" not present"));
          return;
        } else if (idx >= this.headers[name].length) {
          debug("not so many \"".concat(name, "\" headers present"));
          return;
        }
  
        var header = this.headers[name][idx];
        var value = header.raw;
  
        if (header.parsed) {
          return header.parsed;
        } // Substitute '-' by '_' for grammar rule matching.
  
  
        var parsed = Grammar.parse(value, name.replace(/-/g, '_'));
  
        if (parsed === -1) {
          this.headers[name].splice(idx, 1); // delete from headers
  
          debug("error parsing \"".concat(name, "\" header field with value \"").concat(value, "\""));
          return;
        } else {
          header.parsed = parsed;
          return parsed;
        }
      }
      /**
       * Message Header attribute selector. Alias of parseHeader.
       * -param {String} name header name
       * -param {Number} [idx=0] header index
       * -returns {Object|undefined} Parsed header object, undefined if the header
       *  is not present or in case of a parsing error.
       *
       * -example
       * message.s('via',3).port
       */
  
    }, {
      key: "s",
      value: function s(name, idx) {
        return this.parseHeader(name, idx);
      }
      /**
      * Replace the value of the given header by the value.
      * -param {String} name header name
      * -param {String} value header value
      */
  
    }, {
      key: "setHeader",
      value: function setHeader(name, value) {
        var header = {
          raw: value
        };
        this.headers[Utils.headerize(name)] = [header];
      }
      /**
       * Parse the current body as a SDP and store the resulting object
       * into this.sdp.
       * -param {Boolean} force: Parse even if this.sdp already exists.
       *
       * Returns this.sdp.
       */
  
    }, {
      key: "parseSDP",
      value: function parseSDP(force) {
        if (!force && this.sdp) {
          return this.sdp;
        } else {
          this.sdp = sdp_transform.parse(this.body || '');
          return this.sdp;
        }
      }
    }, {
      key: "toString",
      value: function toString() {
        return this.data;
      }
    }]);
  
    return IncomingMessage;
  }();
  
  var IncomingRequest = /*#__PURE__*/function (_IncomingMessage) {
    _inherits(IncomingRequest, _IncomingMessage);
  
    var _super2 = _createSuper(IncomingRequest);
  
    function IncomingRequest(ua) {
      var _this2;
  
      _classCallCheck(this, IncomingRequest);
  
      _this2 = _super2.call(this);
      _this2.ua = ua;
      _this2.headers = {};
      _this2.ruri = null;
      _this2.transport = null;
      _this2.server_transaction = null;
      return _this2;
    }
    /**
    * Stateful reply.
    * -param {Number} code status code
    * -param {String} reason reason phrase
    * -param {Object} headers extra headers
    * -param {String} body body
    * -param {Function} [onSuccess] onSuccess callback
    * -param {Function} [onFailure] onFailure callback
    */
  
  
    _createClass(IncomingRequest, [{
      key: "reply",
      value: function reply(code, reason, extraHeaders, body, onSuccess, onFailure) {
        var supported = [];
        var to = this.getHeader('To');
        code = code || null;
        reason = reason || null; // Validate code and reason values.
  
        if (!code || code < 100 || code > 699) {
          throw new TypeError("Invalid status_code: ".concat(code));
        } else if (reason && typeof reason !== 'string' && !(reason instanceof String)) {
          throw new TypeError("Invalid reason_phrase: ".concat(reason));
        }
  
        reason = reason || JsSIP_C.REASON_PHRASE[code] || '';
        extraHeaders = Utils.cloneArray(extraHeaders);
        var response = "SIP/2.0 ".concat(code, " ").concat(reason, "\r\n");
  
        if (this.method === JsSIP_C.INVITE && code > 100 && code <= 200) {
          var headers = this.getHeaders('record-route');
  
          var _iterator8 = _createForOfIteratorHelper(headers),
              _step8;
  
          try {
            for (_iterator8.s(); !(_step8 = _iterator8.n()).done;) {
              var header = _step8.value;
              response += "Record-Route: ".concat(header, "\r\n");
            }
          } catch (err) {
            _iterator8.e(err);
          } finally {
            _iterator8.f();
          }
        }
  
        var vias = this.getHeaders('via');
  
        var _iterator9 = _createForOfIteratorHelper(vias),
            _step9;
  
        try {
          for (_iterator9.s(); !(_step9 = _iterator9.n()).done;) {
            var via = _step9.value;
            response += "Via: ".concat(via, "\r\n");
          }
        } catch (err) {
          _iterator9.e(err);
        } finally {
          _iterator9.f();
        }
  
        if (!this.to_tag && code > 100) {
          to += ";tag=".concat(Utils.newTag());
        } else if (this.to_tag && !this.s('to').hasParam('tag')) {
          to += ";tag=".concat(this.to_tag);
        }
  
        response += "To: ".concat(to, "\r\n");
        response += "From: ".concat(this.getHeader('From'), "\r\n");
        response += "Call-ID: ".concat(this.call_id, "\r\n");
        response += "CSeq: ".concat(this.cseq, " ").concat(this.method, "\r\n");
  
        var _iterator10 = _createForOfIteratorHelper(extraHeaders),
            _step10;
  
        try {
          for (_iterator10.s(); !(_step10 = _iterator10.n()).done;) {
            var _header2 = _step10.value;
            response += "".concat(_header2.trim(), "\r\n");
          } // Supported.
  
        } catch (err) {
          _iterator10.e(err);
        } finally {
          _iterator10.f();
        }
  
        switch (this.method) {
          case JsSIP_C.INVITE:
            if (this.ua.configuration.session_timers) {
              supported.push('timer');
            }
  
            if (this.ua.contact.pub_gruu || this.ua.contact.temp_gruu) {
              supported.push('gruu');
            }
  
            supported.push('ice', 'replaces');
            break;
  
          case JsSIP_C.UPDATE:
            if (this.ua.configuration.session_timers) {
              supported.push('timer');
            }
  
            if (body) {
              supported.push('ice');
            }
  
            supported.push('replaces');
        }
  
        supported.push('outbound'); // Allow and Accept.
  
        if (this.method === JsSIP_C.OPTIONS) {
          response += "Allow: ".concat(JsSIP_C.ALLOWED_METHODS, "\r\n");
          response += "Accept: ".concat(JsSIP_C.ACCEPTED_BODY_TYPES, "\r\n");
        } else if (code === 405) {
          response += "Allow: ".concat(JsSIP_C.ALLOWED_METHODS, "\r\n");
        } else if (code === 415) {
          response += "Accept: ".concat(JsSIP_C.ACCEPTED_BODY_TYPES, "\r\n");
        }
  
        response += "Supported: ".concat(supported, "\r\n");
  
        if (body) {
          var length = Utils.str_utf8_length(body);
          response += 'Content-Type: application/sdp\r\n';
          response += "Content-Length: ".concat(length, "\r\n\r\n");
          response += body;
        } else {
          response += "Content-Length: ".concat(0, "\r\n\r\n");
        }
  
        this.server_transaction.receiveResponse(code, response, onSuccess, onFailure);
      }
      /**
      * Stateless reply.
      * -param {Number} code status code
      * -param {String} reason reason phrase
      */
  
    }, {
      key: "reply_sl",
      value: function reply_sl() {
        var code = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
        var reason = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
        var vias = this.getHeaders('via'); // Validate code and reason values.
  
        if (!code || code < 100 || code > 699) {
          throw new TypeError("Invalid status_code: ".concat(code));
        } else if (reason && typeof reason !== 'string' && !(reason instanceof String)) {
          throw new TypeError("Invalid reason_phrase: ".concat(reason));
        }
  
        reason = reason || JsSIP_C.REASON_PHRASE[code] || '';
        var response = "SIP/2.0 ".concat(code, " ").concat(reason, "\r\n");
  
        var _iterator11 = _createForOfIteratorHelper(vias),
            _step11;
  
        try {
          for (_iterator11.s(); !(_step11 = _iterator11.n()).done;) {
            var via = _step11.value;
            response += "Via: ".concat(via, "\r\n");
          }
        } catch (err) {
          _iterator11.e(err);
        } finally {
          _iterator11.f();
        }
  
        var to = this.getHeader('To');
  
        if (!this.to_tag && code > 100) {
          to += ";tag=".concat(Utils.newTag());
        } else if (this.to_tag && !this.s('to').hasParam('tag')) {
          to += ";tag=".concat(this.to_tag);
        }
  
        response += "To: ".concat(to, "\r\n");
        response += "From: ".concat(this.getHeader('From'), "\r\n");
        response += "Call-ID: ".concat(this.call_id, "\r\n");
        response += "CSeq: ".concat(this.cseq, " ").concat(this.method, "\r\n");
        response += "Content-Length: ".concat(0, "\r\n\r\n");
        this.transport.send(response);
      }
    }]);
  
    return IncomingRequest;
  }(IncomingMessage);
  
  var IncomingResponse = /*#__PURE__*/function (_IncomingMessage2) {
    _inherits(IncomingResponse, _IncomingMessage2);
  
    var _super3 = _createSuper(IncomingResponse);
  
    function IncomingResponse() {
      var _this3;
  
      _classCallCheck(this, IncomingResponse);
  
      _this3 = _super3.call(this);
      _this3.headers = {};
      _this3.status_code = null;
      _this3.reason_phrase = null;
      return _this3;
    }
  
    return IncomingResponse;
  }(IncomingMessage);
  
  module.exports = {
    OutgoingRequest: OutgoingRequest,
    InitialOutgoingInviteRequest: InitialOutgoingInviteRequest,
    IncomingRequest: IncomingRequest,
    IncomingResponse: IncomingResponse
  };
  },{"./Constants":2,"./Grammar":7,"./NameAddrHeader":10,"./Utils":26,"debug":30,"sdp-transform":35}],20:[function(require,module,exports){
  "use strict";
  
  var Utils = require('./Utils');
  
  var Grammar = require('./Grammar');
  
  var debugerror = require('debug')('JsSIP:ERROR:Socket');
  
  debugerror.log = console.warn.bind(console);
  /**
   * Interface documentation: https://jssip.net/documentation/$last_version/api/socket/
   *
   * interface Socket {
   *  attribute String via_transport
   *  attribute String url
   *  attribute String sip_uri
   *
   *  method connect();
   *  method disconnect();
   *  method send(data);
   *
   *  attribute EventHandler onconnect
   *  attribute EventHandler ondisconnect
   *  attribute EventHandler ondata
   * }
   *
   */
  
  exports.isSocket = function (socket) {
    // Ignore if an array is given.
    if (Array.isArray(socket)) {
      return false;
    }
  
    if (typeof socket === 'undefined') {
      debugerror('undefined JsSIP.Socket instance');
      return false;
    } // Check Properties.
  
  
    try {
      if (!Utils.isString(socket.url)) {
        debugerror('missing or invalid JsSIP.Socket url property');
        throw new Error();
      }
  
      if (!Utils.isString(socket.via_transport)) {
        debugerror('missing or invalid JsSIP.Socket via_transport property');
        throw new Error();
      }
  
      if (Grammar.parse(socket.sip_uri, 'SIP_URI') === -1) {
        debugerror('missing or invalid JsSIP.Socket sip_uri property');
        throw new Error();
      }
    } catch (e) {
      return false;
    } // Check Methods.
  
  
    try {
      ['connect', 'disconnect', 'send'].forEach(function (method) {
        if (!Utils.isFunction(socket[method])) {
          debugerror("missing or invalid JsSIP.Socket method: ".concat(method));
          throw new Error();
        }
      });
    } catch (e) {
      return false;
    }
  
    return true;
  };
  },{"./Grammar":7,"./Utils":26,"debug":30}],21:[function(require,module,exports){
  "use strict";
  
  var T1 = 500,
      T2 = 4000,
      T4 = 5000;
  module.exports = {
    T1: T1,
    T2: T2,
    T4: T4,
    TIMER_B: 64 * T1,
    TIMER_D: 0 * T1,
    TIMER_F: 64 * T1,
    TIMER_H: 64 * T1,
    TIMER_I: 0 * T1,
    TIMER_J: 0 * T1,
    TIMER_K: 0 * T4,
    TIMER_L: 64 * T1,
    TIMER_M: 64 * T1,
    PROVISIONAL_RESPONSE_INTERVAL: 60000 // See RFC 3261 Section 13.3.1.1
  
  };
  },{}],22:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  var EventEmitter = require('events').EventEmitter;
  
  var JsSIP_C = require('./Constants');
  
  var SIPMessage = require('./SIPMessage');
  
  var Timers = require('./Timers');
  
  var debugnict = require('debug')('JsSIP:NonInviteClientTransaction');
  
  var debugict = require('debug')('JsSIP:InviteClientTransaction');
  
  var debugact = require('debug')('JsSIP:AckClientTransaction');
  
  var debugnist = require('debug')('JsSIP:NonInviteServerTransaction');
  
  var debugist = require('debug')('JsSIP:InviteServerTransaction');
  
  var C = {
    // Transaction states.
    STATUS_TRYING: 1,
    STATUS_PROCEEDING: 2,
    STATUS_CALLING: 3,
    STATUS_ACCEPTED: 4,
    STATUS_COMPLETED: 5,
    STATUS_TERMINATED: 6,
    STATUS_CONFIRMED: 7,
    // Transaction types.
    NON_INVITE_CLIENT: 'nict',
    NON_INVITE_SERVER: 'nist',
    INVITE_CLIENT: 'ict',
    INVITE_SERVER: 'ist'
  };
  
  var NonInviteClientTransaction = /*#__PURE__*/function (_EventEmitter) {
    _inherits(NonInviteClientTransaction, _EventEmitter);
  
    var _super = _createSuper(NonInviteClientTransaction);
  
    function NonInviteClientTransaction(ua, transport, request, eventHandlers) {
      var _this;
  
      _classCallCheck(this, NonInviteClientTransaction);
  
      _this = _super.call(this);
      _this.type = C.NON_INVITE_CLIENT;
      _this.id = "z9hG4bK".concat(Math.floor(Math.random() * 10000000));
      _this.ua = ua;
      _this.transport = transport;
      _this.request = request;
      _this.eventHandlers = eventHandlers;
      var via = "SIP/2.0/".concat(transport.via_transport);
      via += " ".concat(ua.configuration.via_host, ";branch=").concat(_this.id);
  
      _this.request.setHeader('via', via);
  
      _this.ua.newTransaction(_assertThisInitialized(_this));
  
      return _this;
    }
  
    _createClass(NonInviteClientTransaction, [{
      key: "stateChanged",
      value: function stateChanged(state) {
        this.state = state;
        this.emit('stateChanged');
      }
    }, {
      key: "send",
      value: function send() {
        var _this2 = this;
  
        this.stateChanged(C.STATUS_TRYING);
        this.F = setTimeout(function () {
          _this2.timer_F();
        }, Timers.TIMER_F);
  
        if (!this.transport.send(this.request)) {
          this.onTransportError();
        }
      }
    }, {
      key: "onTransportError",
      value: function onTransportError() {
        debugnict("transport error occurred, deleting transaction ".concat(this.id));
        clearTimeout(this.F);
        clearTimeout(this.K);
        this.stateChanged(C.STATUS_TERMINATED);
        this.ua.destroyTransaction(this);
        this.eventHandlers.onTransportError();
      }
    }, {
      key: "timer_F",
      value: function timer_F() {
        debugnict("Timer F expired for transaction ".concat(this.id));
        this.stateChanged(C.STATUS_TERMINATED);
        this.ua.destroyTransaction(this);
        this.eventHandlers.onRequestTimeout();
      }
    }, {
      key: "timer_K",
      value: function timer_K() {
        this.stateChanged(C.STATUS_TERMINATED);
        this.ua.destroyTransaction(this);
      }
    }, {
      key: "receiveResponse",
      value: function receiveResponse(response) {
        var _this3 = this;
  
        var status_code = response.status_code;
  
        if (status_code < 200) {
          switch (this.state) {
            case C.STATUS_TRYING:
            case C.STATUS_PROCEEDING:
              this.stateChanged(C.STATUS_PROCEEDING);
              this.eventHandlers.onReceiveResponse(response);
              break;
          }
        } else {
          switch (this.state) {
            case C.STATUS_TRYING:
            case C.STATUS_PROCEEDING:
              this.stateChanged(C.STATUS_COMPLETED);
              clearTimeout(this.F);
  
              if (status_code === 408) {
                this.eventHandlers.onRequestTimeout();
              } else {
                this.eventHandlers.onReceiveResponse(response);
              }
  
              this.K = setTimeout(function () {
                _this3.timer_K();
              }, Timers.TIMER_K);
              break;
  
            case C.STATUS_COMPLETED:
              break;
          }
        }
      }
    }, {
      key: "C",
      get: function get() {
        return C;
      }
    }]);
  
    return NonInviteClientTransaction;
  }(EventEmitter);
  
  var InviteClientTransaction = /*#__PURE__*/function (_EventEmitter2) {
    _inherits(InviteClientTransaction, _EventEmitter2);
  
    var _super2 = _createSuper(InviteClientTransaction);
  
    function InviteClientTransaction(ua, transport, request, eventHandlers) {
      var _this4;
  
      _classCallCheck(this, InviteClientTransaction);
  
      _this4 = _super2.call(this);
      _this4.type = C.INVITE_CLIENT;
      _this4.id = "z9hG4bK".concat(Math.floor(Math.random() * 10000000));
      _this4.ua = ua;
      _this4.transport = transport;
      _this4.request = request;
      _this4.eventHandlers = eventHandlers;
      request.transaction = _assertThisInitialized(_this4);
      var via = "SIP/2.0/".concat(transport.via_transport);
      via += " ".concat(ua.configuration.via_host, ";branch=").concat(_this4.id);
  
      _this4.request.setHeader('via', via);
  
      _this4.ua.newTransaction(_assertThisInitialized(_this4));
  
      return _this4;
    }
  
    _createClass(InviteClientTransaction, [{
      key: "stateChanged",
      value: function stateChanged(state) {
        this.state = state;
        this.emit('stateChanged');
      }
    }, {
      key: "send",
      value: function send() {
        var _this5 = this;
  
        this.stateChanged(C.STATUS_CALLING);
        this.B = setTimeout(function () {
          _this5.timer_B();
        }, Timers.TIMER_B);
  
        if (!this.transport.send(this.request)) {
          this.onTransportError();
        }
      }
    }, {
      key: "onTransportError",
      value: function onTransportError() {
        clearTimeout(this.B);
        clearTimeout(this.D);
        clearTimeout(this.M);
  
        if (this.state !== C.STATUS_ACCEPTED) {
          debugict("transport error occurred, deleting transaction ".concat(this.id));
          this.eventHandlers.onTransportError();
        }
  
        this.stateChanged(C.STATUS_TERMINATED);
        this.ua.destroyTransaction(this);
      } // RFC 6026 7.2.
  
    }, {
      key: "timer_M",
      value: function timer_M() {
        debugict("Timer M expired for transaction ".concat(this.id));
  
        if (this.state === C.STATUS_ACCEPTED) {
          clearTimeout(this.B);
          this.stateChanged(C.STATUS_TERMINATED);
          this.ua.destroyTransaction(this);
        }
      } // RFC 3261 17.1.1.
  
    }, {
      key: "timer_B",
      value: function timer_B() {
        debugict("Timer B expired for transaction ".concat(this.id));
  
        if (this.state === C.STATUS_CALLING) {
          this.stateChanged(C.STATUS_TERMINATED);
          this.ua.destroyTransaction(this);
          this.eventHandlers.onRequestTimeout();
        }
      }
    }, {
      key: "timer_D",
      value: function timer_D() {
        debugict("Timer D expired for transaction ".concat(this.id));
        clearTimeout(this.B);
        this.stateChanged(C.STATUS_TERMINATED);
        this.ua.destroyTransaction(this);
      }
    }, {
      key: "sendACK",
      value: function sendACK(response) {
        var _this6 = this;
  
        var ack = new SIPMessage.OutgoingRequest(JsSIP_C.ACK, this.request.ruri, this.ua, {
          'route_set': this.request.getHeaders('route'),
          'call_id': this.request.getHeader('call-id'),
          'cseq': this.request.cseq
        });
        ack.setHeader('from', this.request.getHeader('from'));
        ack.setHeader('via', this.request.getHeader('via'));
        ack.setHeader('to', response.getHeader('to'));
        this.D = setTimeout(function () {
          _this6.timer_D();
        }, Timers.TIMER_D);
        this.transport.send(ack);
      }
    }, {
      key: "cancel",
      value: function cancel(reason) {
        // Send only if a provisional response (>100) has been received.
        if (this.state !== C.STATUS_PROCEEDING) {
          return;
        }
  
        var cancel = new SIPMessage.OutgoingRequest(JsSIP_C.CANCEL, this.request.ruri, this.ua, {
          'route_set': this.request.getHeaders('route'),
          'call_id': this.request.getHeader('call-id'),
          'cseq': this.request.cseq
        });
        cancel.setHeader('from', this.request.getHeader('from'));
        cancel.setHeader('via', this.request.getHeader('via'));
        cancel.setHeader('to', this.request.getHeader('to'));
  
        if (reason) {
          cancel.setHeader('reason', reason);
        }
  
        this.transport.send(cancel);
      }
    }, {
      key: "receiveResponse",
      value: function receiveResponse(response) {
        var _this7 = this;
  
        var status_code = response.status_code;
  
        if (status_code >= 100 && status_code <= 199) {
          switch (this.state) {
            case C.STATUS_CALLING:
              this.stateChanged(C.STATUS_PROCEEDING);
              this.eventHandlers.onReceiveResponse(response);
              break;
  
            case C.STATUS_PROCEEDING:
              this.eventHandlers.onReceiveResponse(response);
              break;
          }
        } else if (status_code >= 200 && status_code <= 299) {
          switch (this.state) {
            case C.STATUS_CALLING:
            case C.STATUS_PROCEEDING:
              this.stateChanged(C.STATUS_ACCEPTED);
              this.M = setTimeout(function () {
                _this7.timer_M();
              }, Timers.TIMER_M);
              this.eventHandlers.onReceiveResponse(response);
              break;
  
            case C.STATUS_ACCEPTED:
              this.eventHandlers.onReceiveResponse(response);
              break;
          }
        } else if (status_code >= 300 && status_code <= 699) {
          switch (this.state) {
            case C.STATUS_CALLING:
            case C.STATUS_PROCEEDING:
              this.stateChanged(C.STATUS_COMPLETED);
              this.sendACK(response);
              this.eventHandlers.onReceiveResponse(response);
              break;
  
            case C.STATUS_COMPLETED:
              this.sendACK(response);
              break;
          }
        }
      }
    }, {
      key: "C",
      get: function get() {
        return C;
      }
    }]);
  
    return InviteClientTransaction;
  }(EventEmitter);
  
  var AckClientTransaction = /*#__PURE__*/function (_EventEmitter3) {
    _inherits(AckClientTransaction, _EventEmitter3);
  
    var _super3 = _createSuper(AckClientTransaction);
  
    function AckClientTransaction(ua, transport, request, eventHandlers) {
      var _this8;
  
      _classCallCheck(this, AckClientTransaction);
  
      _this8 = _super3.call(this);
      _this8.id = "z9hG4bK".concat(Math.floor(Math.random() * 10000000));
      _this8.transport = transport;
      _this8.request = request;
      _this8.eventHandlers = eventHandlers;
      var via = "SIP/2.0/".concat(transport.via_transport);
      via += " ".concat(ua.configuration.via_host, ";branch=").concat(_this8.id);
  
      _this8.request.setHeader('via', via);
  
      return _this8;
    }
  
    _createClass(AckClientTransaction, [{
      key: "send",
      value: function send() {
        if (!this.transport.send(this.request)) {
          this.onTransportError();
        }
      }
    }, {
      key: "onTransportError",
      value: function onTransportError() {
        debugact("transport error occurred for transaction ".concat(this.id));
        this.eventHandlers.onTransportError();
      }
    }, {
      key: "C",
      get: function get() {
        return C;
      }
    }]);
  
    return AckClientTransaction;
  }(EventEmitter);
  
  var NonInviteServerTransaction = /*#__PURE__*/function (_EventEmitter4) {
    _inherits(NonInviteServerTransaction, _EventEmitter4);
  
    var _super4 = _createSuper(NonInviteServerTransaction);
  
    function NonInviteServerTransaction(ua, transport, request) {
      var _this9;
  
      _classCallCheck(this, NonInviteServerTransaction);
  
      _this9 = _super4.call(this);
      _this9.type = C.NON_INVITE_SERVER;
      _this9.id = request.via_branch;
      _this9.ua = ua;
      _this9.transport = transport;
      _this9.request = request;
      _this9.last_response = '';
      request.server_transaction = _assertThisInitialized(_this9);
      _this9.state = C.STATUS_TRYING;
      ua.newTransaction(_assertThisInitialized(_this9));
      return _this9;
    }
  
    _createClass(NonInviteServerTransaction, [{
      key: "stateChanged",
      value: function stateChanged(state) {
        this.state = state;
        this.emit('stateChanged');
      }
    }, {
      key: "timer_J",
      value: function timer_J() {
        debugnist("Timer J expired for transaction ".concat(this.id));
        this.stateChanged(C.STATUS_TERMINATED);
        this.ua.destroyTransaction(this);
      }
    }, {
      key: "onTransportError",
      value: function onTransportError() {
        if (!this.transportError) {
          this.transportError = true;
          debugnist("transport error occurred, deleting transaction ".concat(this.id));
          clearTimeout(this.J);
          this.stateChanged(C.STATUS_TERMINATED);
          this.ua.destroyTransaction(this);
        }
      }
    }, {
      key: "receiveResponse",
      value: function receiveResponse(status_code, response, onSuccess, onFailure) {
        var _this10 = this;
  
        if (status_code === 100) {
          /* RFC 4320 4.1
           * 'A SIP element MUST NOT
           * send any provisional response with a
           * Status-Code other than 100 to a non-INVITE request.'
           */
          switch (this.state) {
            case C.STATUS_TRYING:
              this.stateChanged(C.STATUS_PROCEEDING);
  
              if (!this.transport.send(response)) {
                this.onTransportError();
              }
  
              break;
  
            case C.STATUS_PROCEEDING:
              this.last_response = response;
  
              if (!this.transport.send(response)) {
                this.onTransportError();
  
                if (onFailure) {
                  onFailure();
                }
              } else if (onSuccess) {
                onSuccess();
              }
  
              break;
          }
        } else if (status_code >= 200 && status_code <= 699) {
          switch (this.state) {
            case C.STATUS_TRYING:
            case C.STATUS_PROCEEDING:
              this.stateChanged(C.STATUS_COMPLETED);
              this.last_response = response;
              this.J = setTimeout(function () {
                _this10.timer_J();
              }, Timers.TIMER_J);
  
              if (!this.transport.send(response)) {
                this.onTransportError();
  
                if (onFailure) {
                  onFailure();
                }
              } else if (onSuccess) {
                onSuccess();
              }
  
              break;
  
            case C.STATUS_COMPLETED:
              break;
          }
        }
      }
    }, {
      key: "C",
      get: function get() {
        return C;
      }
    }]);
  
    return NonInviteServerTransaction;
  }(EventEmitter);
  
  var InviteServerTransaction = /*#__PURE__*/function (_EventEmitter5) {
    _inherits(InviteServerTransaction, _EventEmitter5);
  
    var _super5 = _createSuper(InviteServerTransaction);
  
    function InviteServerTransaction(ua, transport, request) {
      var _this11;
  
      _classCallCheck(this, InviteServerTransaction);
  
      _this11 = _super5.call(this);
      _this11.type = C.INVITE_SERVER;
      _this11.id = request.via_branch;
      _this11.ua = ua;
      _this11.transport = transport;
      _this11.request = request;
      _this11.last_response = '';
      request.server_transaction = _assertThisInitialized(_this11);
      _this11.state = C.STATUS_PROCEEDING;
      ua.newTransaction(_assertThisInitialized(_this11));
      _this11.resendProvisionalTimer = null;
      request.reply(100);
      return _this11;
    }
  
    _createClass(InviteServerTransaction, [{
      key: "stateChanged",
      value: function stateChanged(state) {
        this.state = state;
        this.emit('stateChanged');
      }
    }, {
      key: "timer_H",
      value: function timer_H() {
        debugist("Timer H expired for transaction ".concat(this.id));
  
        if (this.state === C.STATUS_COMPLETED) {
          debugist('ACK not received, dialog will be terminated');
        }
  
        this.stateChanged(C.STATUS_TERMINATED);
        this.ua.destroyTransaction(this);
      }
    }, {
      key: "timer_I",
      value: function timer_I() {
        this.stateChanged(C.STATUS_TERMINATED);
      } // RFC 6026 7.1.
  
    }, {
      key: "timer_L",
      value: function timer_L() {
        debugist("Timer L expired for transaction ".concat(this.id));
  
        if (this.state === C.STATUS_ACCEPTED) {
          this.stateChanged(C.STATUS_TERMINATED);
          this.ua.destroyTransaction(this);
        }
      }
    }, {
      key: "onTransportError",
      value: function onTransportError() {
        if (!this.transportError) {
          this.transportError = true;
          debugist("transport error occurred, deleting transaction ".concat(this.id));
  
          if (this.resendProvisionalTimer !== null) {
            clearInterval(this.resendProvisionalTimer);
            this.resendProvisionalTimer = null;
          }
  
          clearTimeout(this.L);
          clearTimeout(this.H);
          clearTimeout(this.I);
          this.stateChanged(C.STATUS_TERMINATED);
          this.ua.destroyTransaction(this);
        }
      }
    }, {
      key: "resend_provisional",
      value: function resend_provisional() {
        if (!this.transport.send(this.last_response)) {
          this.onTransportError();
        }
      } // INVITE Server Transaction RFC 3261 17.2.1.
  
    }, {
      key: "receiveResponse",
      value: function receiveResponse(status_code, response, onSuccess, onFailure) {
        var _this12 = this;
  
        if (status_code >= 100 && status_code <= 199) {
          switch (this.state) {
            case C.STATUS_PROCEEDING:
              if (!this.transport.send(response)) {
                this.onTransportError();
              }
  
              this.last_response = response;
              break;
          }
        }
  
        if (status_code > 100 && status_code <= 199 && this.state === C.STATUS_PROCEEDING) {
          // Trigger the resendProvisionalTimer only for the first non 100 provisional response.
          if (this.resendProvisionalTimer === null) {
            this.resendProvisionalTimer = setInterval(function () {
              _this12.resend_provisional();
            }, Timers.PROVISIONAL_RESPONSE_INTERVAL);
          }
        } else if (status_code >= 200 && status_code <= 299) {
          switch (this.state) {
            case C.STATUS_PROCEEDING:
              this.stateChanged(C.STATUS_ACCEPTED);
              this.last_response = response;
              this.L = setTimeout(function () {
                _this12.timer_L();
              }, Timers.TIMER_L);
  
              if (this.resendProvisionalTimer !== null) {
                clearInterval(this.resendProvisionalTimer);
                this.resendProvisionalTimer = null;
              }
  
            /* falls through */
  
            case C.STATUS_ACCEPTED:
              // Note that this point will be reached for proceeding this.state also.
              if (!this.transport.send(response)) {
                this.onTransportError();
  
                if (onFailure) {
                  onFailure();
                }
              } else if (onSuccess) {
                onSuccess();
              }
  
              break;
          }
        } else if (status_code >= 300 && status_code <= 699) {
          switch (this.state) {
            case C.STATUS_PROCEEDING:
              if (this.resendProvisionalTimer !== null) {
                clearInterval(this.resendProvisionalTimer);
                this.resendProvisionalTimer = null;
              }
  
              if (!this.transport.send(response)) {
                this.onTransportError();
  
                if (onFailure) {
                  onFailure();
                }
              } else {
                this.stateChanged(C.STATUS_COMPLETED);
                this.H = setTimeout(function () {
                  _this12.timer_H();
                }, Timers.TIMER_H);
  
                if (onSuccess) {
                  onSuccess();
                }
              }
  
              break;
          }
        }
      }
    }, {
      key: "C",
      get: function get() {
        return C;
      }
    }]);
  
    return InviteServerTransaction;
  }(EventEmitter);
  /**
   * INVITE:
   *  _true_ if retransmission
   *  _false_ new request
   *
   * ACK:
   *  _true_  ACK to non2xx response
   *  _false_ ACK must be passed to TU (accepted state)
   *          ACK to 2xx response
   *
   * CANCEL:
   *  _true_  no matching invite transaction
   *  _false_ matching invite transaction and no final response sent
   *
   * OTHER:
   *  _true_  retransmission
   *  _false_ new request
   */
  
  
  function checkTransaction(_ref, request) {
    var _transactions = _ref._transactions;
    var tr;
  
    switch (request.method) {
      case JsSIP_C.INVITE:
        tr = _transactions.ist[request.via_branch];
  
        if (tr) {
          switch (tr.state) {
            case C.STATUS_PROCEEDING:
              tr.transport.send(tr.last_response);
              break;
            // RFC 6026 7.1 Invite retransmission.
            // Received while in C.STATUS_ACCEPTED state. Absorb it.
  
            case C.STATUS_ACCEPTED:
              break;
          }
  
          return true;
        }
  
        break;
  
      case JsSIP_C.ACK:
        tr = _transactions.ist[request.via_branch]; // RFC 6026 7.1.
  
        if (tr) {
          if (tr.state === C.STATUS_ACCEPTED) {
            return false;
          } else if (tr.state === C.STATUS_COMPLETED) {
            tr.state = C.STATUS_CONFIRMED;
            tr.I = setTimeout(function () {
              tr.timer_I();
            }, Timers.TIMER_I);
            return true;
          }
        } // ACK to 2XX Response.
        else {
            return false;
          }
  
        break;
  
      case JsSIP_C.CANCEL:
        tr = _transactions.ist[request.via_branch];
  
        if (tr) {
          request.reply_sl(200);
  
          if (tr.state === C.STATUS_PROCEEDING) {
            return false;
          } else {
            return true;
          }
        } else {
          request.reply_sl(481);
          return true;
        }
  
      default:
        // Non-INVITE Server Transaction RFC 3261 17.2.2.
        tr = _transactions.nist[request.via_branch];
  
        if (tr) {
          switch (tr.state) {
            case C.STATUS_TRYING:
              break;
  
            case C.STATUS_PROCEEDING:
            case C.STATUS_COMPLETED:
              tr.transport.send(tr.last_response);
              break;
          }
  
          return true;
        }
  
        break;
    }
  }
  
  module.exports = {
    C: C,
    NonInviteClientTransaction: NonInviteClientTransaction,
    InviteClientTransaction: InviteClientTransaction,
    AckClientTransaction: AckClientTransaction,
    NonInviteServerTransaction: NonInviteServerTransaction,
    InviteServerTransaction: InviteServerTransaction,
    checkTransaction: checkTransaction
  };
  },{"./Constants":2,"./SIPMessage":19,"./Timers":21,"debug":30,"events":29}],23:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var Socket = require('./Socket');
  
  var debug = require('debug')('JsSIP:Transport');
  
  var debugerror = require('debug')('JsSIP:ERROR:Transport');
  
  var JsSIP_C = require('./Constants');
  
  debugerror.log = console.warn.bind(console);
  /**
   * Constants
   */
  
  var C = {
    // Transport status.
    STATUS_CONNECTED: 0,
    STATUS_CONNECTING: 1,
    STATUS_DISCONNECTED: 2,
    // Socket status.
    SOCKET_STATUS_READY: 0,
    SOCKET_STATUS_ERROR: 1,
    // Recovery options.
    recovery_options: {
      // minimum interval in seconds between recover attempts.
      min_interval: JsSIP_C.CONNECTION_RECOVERY_MIN_INTERVAL,
      // maximum interval in seconds between recover attempts.
      max_interval: JsSIP_C.CONNECTION_RECOVERY_MAX_INTERVAL
    }
  };
  /*
   * Manages one or multiple JsSIP.Socket instances.
   * Is reponsible for transport recovery logic among all socket instances.
   *
   * @socket JsSIP::Socket instance
   */
  
  module.exports = /*#__PURE__*/function () {
    function Transport(sockets) {
      var recovery_options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : C.recovery_options;
  
      _classCallCheck(this, Transport);
  
      debug('new()');
      this.status = C.STATUS_DISCONNECTED; // Current socket.
  
      this.socket = null; // Socket collection.
  
      this.sockets = [];
      this.recovery_options = recovery_options;
      this.recover_attempts = 0;
      this.recovery_timer = null;
      this.close_requested = false;
  
      if (typeof sockets === 'undefined') {
        throw new TypeError('Invalid argument.' + ' undefined \'sockets\' argument');
      }
  
      if (!(sockets instanceof Array)) {
        sockets = [sockets];
      }
  
      sockets.forEach(function (socket) {
        if (!Socket.isSocket(socket.socket)) {
          throw new TypeError('Invalid argument.' + ' invalid \'JsSIP.Socket\' instance');
        }
  
        if (socket.weight && !Number(socket.weight)) {
          throw new TypeError('Invalid argument.' + ' \'weight\' attribute is not a number');
        }
  
        this.sockets.push({
          socket: socket.socket,
          weight: socket.weight || 0,
          status: C.SOCKET_STATUS_READY
        });
      }, this); // Get the socket with higher weight.
  
      this._getSocket();
    }
    /**
     * Instance Methods
     */
  
  
    _createClass(Transport, [{
      key: "connect",
      value: function connect() {
        debug('connect()');
  
        if (this.isConnected()) {
          debug('Transport is already connected');
          return;
        } else if (this.isConnecting()) {
          debug('Transport is connecting');
          return;
        }
  
        this.close_requested = false;
        this.status = C.STATUS_CONNECTING;
        this.onconnecting({
          socket: this.socket,
          attempts: this.recover_attempts
        });
  
        if (!this.close_requested) {
          // Bind socket event callbacks.
          this.socket.onconnect = this._onConnect.bind(this);
          this.socket.ondisconnect = this._onDisconnect.bind(this);
          this.socket.ondata = this._onData.bind(this);
          this.socket.connect();
        }
  
        return;
      }
    }, {
      key: "disconnect",
      value: function disconnect() {
        debug('close()');
        this.close_requested = true;
        this.recover_attempts = 0;
        this.status = C.STATUS_DISCONNECTED; // Clear recovery_timer.
  
        if (this.recovery_timer !== null) {
          clearTimeout(this.recovery_timer);
          this.recovery_timer = null;
        } // Unbind socket event callbacks.
  
  
        this.socket.onconnect = function () {};
  
        this.socket.ondisconnect = function () {};
  
        this.socket.ondata = function () {};
  
        this.socket.disconnect();
        this.ondisconnect({
          socket: this.socket,
          error: false
        });
      }
    }, {
      key: "send",
      value: function send(data) {
        debug('send()');
  
        if (!this.isConnected()) {
          debugerror('unable to send message, transport is not connected');
          return false;
        }
  
        var message = data.toString();
        debug("sending message:\n\n".concat(message, "\n"));
        return this.socket.send(message);
      }
    }, {
      key: "isConnected",
      value: function isConnected() {
        return this.status === C.STATUS_CONNECTED;
      }
    }, {
      key: "isConnecting",
      value: function isConnecting() {
        return this.status === C.STATUS_CONNECTING;
      }
      /**
       * Private API.
       */
  
    }, {
      key: "_reconnect",
      value: function _reconnect() {
        var _this = this;
  
        this.recover_attempts += 1;
        var k = Math.floor(Math.random() * Math.pow(2, this.recover_attempts) + 1);
  
        if (k < this.recovery_options.min_interval) {
          k = this.recovery_options.min_interval;
        } else if (k > this.recovery_options.max_interval) {
          k = this.recovery_options.max_interval;
        }
  
        debug("reconnection attempt: ".concat(this.recover_attempts, ". next connection attempt in ").concat(k, " seconds"));
        this.recovery_timer = setTimeout(function () {
          if (!_this.close_requested && !(_this.isConnected() || _this.isConnecting())) {
            // Get the next available socket with higher weight.
            _this._getSocket(); // Connect the socket.
  
  
            _this.connect();
          }
        }, k * 1000);
      }
      /**
       * get the next available socket with higher weight
       */
  
    }, {
      key: "_getSocket",
      value: function _getSocket() {
        var candidates = [];
        this.sockets.forEach(function (socket) {
          if (socket.status === C.SOCKET_STATUS_ERROR) {
            return; // continue the array iteration
          } else if (candidates.length === 0) {
            candidates.push(socket);
          } else if (socket.weight > candidates[0].weight) {
            candidates = [socket];
          } else if (socket.weight === candidates[0].weight) {
            candidates.push(socket);
          }
        });
  
        if (candidates.length === 0) {
          // All sockets have failed. reset sockets status.
          this.sockets.forEach(function (socket) {
            socket.status = C.SOCKET_STATUS_READY;
          }); // Get next available socket.
  
          this._getSocket();
  
          return;
        }
  
        var idx = Math.floor(Math.random() * candidates.length);
        this.socket = candidates[idx].socket;
      }
      /**
       * Socket Event Handlers
       */
  
    }, {
      key: "_onConnect",
      value: function _onConnect() {
        this.recover_attempts = 0;
        this.status = C.STATUS_CONNECTED; // Clear recovery_timer.
  
        if (this.recovery_timer !== null) {
          clearTimeout(this.recovery_timer);
          this.recovery_timer = null;
        }
  
        this.onconnect({
          socket: this
        });
      }
    }, {
      key: "_onDisconnect",
      value: function _onDisconnect(error, code, reason) {
        this.status = C.STATUS_DISCONNECTED;
        this.ondisconnect({
          socket: this.socket,
          error: error,
          code: code,
          reason: reason
        });
  
        if (this.close_requested) {
          return;
        } // Update socket status.
        else {
            this.sockets.forEach(function (socket) {
              if (this.socket === socket.socket) {
                socket.status = C.SOCKET_STATUS_ERROR;
              }
            }, this);
          }
  
        this._reconnect(error);
      }
    }, {
      key: "_onData",
      value: function _onData(data) {
        // CRLF Keep Alive response from server. Ignore it.
        if (data === '\r\n') {
          debug('received message with CRLF Keep Alive response');
          return;
        } // Binary message.
        else if (typeof data !== 'string') {
            try {
              data = String.fromCharCode.apply(null, new Uint8Array(data));
            } catch (evt) {
              debug('received binary message failed to be converted into string,' + ' message discarded');
              return;
            }
  
            debug("received binary message:\n\n".concat(data, "\n"));
          } // Text message.
          else {
              debug("received text message:\n\n".concat(data, "\n"));
            }
  
        this.ondata({
          transport: this,
          message: data
        });
      }
    }, {
      key: "via_transport",
      get: function get() {
        return this.socket.via_transport;
      }
    }, {
      key: "url",
      get: function get() {
        return this.socket.url;
      }
    }, {
      key: "sip_uri",
      get: function get() {
        return this.socket.sip_uri;
      }
    }]);
  
    return Transport;
  }();
  },{"./Constants":2,"./Socket":20,"debug":30}],24:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  function _createSuper(Derived) { return function () { var Super = _getPrototypeOf(Derived), result; if (_isNativeReflectConstruct()) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
  
  function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
  
  function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
  
  function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
  
  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
  
  function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
  
  var EventEmitter = require('events').EventEmitter;
  
  var JsSIP_C = require('./Constants');
  
  var Registrator = require('./Registrator');
  
  var RTCSession = require('./RTCSession');
  
  var Message = require('./Message');
  
  var Transactions = require('./Transactions');
  
  var Transport = require('./Transport');
  
  var Utils = require('./Utils');
  
  var Exceptions = require('./Exceptions');
  
  var URI = require('./URI');
  
  var Parser = require('./Parser');
  
  var SIPMessage = require('./SIPMessage');
  
  var sanityCheck = require('./sanityCheck');
  
  var config = require('./Config');
  
  var debug = require('debug')('JsSIP:UA');
  
  var debugerror = require('debug')('JsSIP:ERROR:UA');
  
  debugerror.log = console.warn.bind(console);
  var C = {
    // UA status codes.
    STATUS_INIT: 0,
    STATUS_READY: 1,
    STATUS_USER_CLOSED: 2,
    STATUS_NOT_READY: 3,
    // UA error codes.
    CONFIGURATION_ERROR: 1,
    NETWORK_ERROR: 2
  };
  /**
   * The User-Agent class.
   * @class JsSIP.UA
   * @param {Object} configuration Configuration parameters.
   * @throws {JsSIP.Exceptions.ConfigurationError} If a configuration parameter is invalid.
   * @throws {TypeError} If no configuration is given.
   */
  
  module.exports = /*#__PURE__*/function (_EventEmitter) {
    _inherits(UA, _EventEmitter);
  
    var _super = _createSuper(UA);
  
    _createClass(UA, null, [{
      key: "C",
      // Expose C object.
      get: function get() {
        return C;
      }
    }]);
  
    function UA(configuration) {
      var _this;
  
      _classCallCheck(this, UA);
  
      debug('new() [configuration:%o]', configuration);
      _this = _super.call(this);
      _this._cache = {
        credentials: {}
      };
      _this._configuration = Object.assign({}, config.settings);
      _this._dynConfiguration = {};
      _this._dialogs = {}; // User actions outside any session/dialog (MESSAGE).
  
      _this._applicants = {};
      _this._sessions = {};
      _this._transport = null;
      _this._contact = null;
      _this._status = C.STATUS_INIT;
      _this._error = null;
      _this._transactions = {
        nist: {},
        nict: {},
        ist: {},
        ict: {}
      }; // Custom UA empty object for high level use.
  
      _this._data = {};
      _this._closeTimer = null; // Check configuration argument.
  
      if (configuration === undefined) {
        throw new TypeError('Not enough arguments');
      } // Load configuration.
  
  
      try {
        _this._loadConfig(configuration);
      } catch (e) {
        _this._status = C.STATUS_NOT_READY;
        _this._error = C.CONFIGURATION_ERROR;
        throw e;
      } // Initialize registrator.
  
  
      _this._registrator = new Registrator(_assertThisInitialized(_this));
      return _this;
    }
  
    _createClass(UA, [{
      key: "start",
      // =================
      //  High Level API
      // =================
  
      /**
       * Connect to the server if status = STATUS_INIT.
       * Resume UA after being closed.
       */
      value: function start() {
        debug('start()');
  
        if (this._status === C.STATUS_INIT) {
          this._transport.connect();
        } else if (this._status === C.STATUS_USER_CLOSED) {
          debug('restarting UA'); // Disconnect.
  
          if (this._closeTimer !== null) {
            clearTimeout(this._closeTimer);
            this._closeTimer = null;
  
            this._transport.disconnect();
          } // Reconnect.
  
  
          this._status = C.STATUS_INIT;
  
          this._transport.connect();
        } else if (this._status === C.STATUS_READY) {
          debug('UA is in READY status, not restarted');
        } else {
          debug('ERROR: connection is down, Auto-Recovery system is trying to reconnect');
        } // Set dynamic configuration.
  
  
        this._dynConfiguration.register = this._configuration.register;
      }
      /**
       * Register.
       */
  
    }, {
      key: "register",
      value: function register() {
        debug('register()');
        this._dynConfiguration.register = true;
  
        this._registrator.register();
      }
      /**
       * Unregister.
       */
  
    }, {
      key: "unregister",
      value: function unregister(options) {
        debug('unregister()');
        this._dynConfiguration.register = false;
  
        this._registrator.unregister(options);
      }
      /**
       * Get the Registrator instance.
       */
  
    }, {
      key: "registrator",
      value: function registrator() {
        return this._registrator;
      }
      /**
       * Registration state.
       */
  
    }, {
      key: "isRegistered",
      value: function isRegistered() {
        return this._registrator.registered;
      }
      /**
       * Connection state.
       */
  
    }, {
      key: "isConnected",
      value: function isConnected() {
        return this._transport.isConnected();
      }
      /**
       * Make an outgoing call.
       *
       * -param {String} target
       * -param {Object} [options]
       *
       * -throws {TypeError}
       *
       */
  
    }, {
      key: "call",
      value: function call(target, options) {
        debug('call()');
        var session = new RTCSession(this);
        session.connect(target, options);
        return session;
      }
      /**
       * Send a message.
       *
       * -param {String} target
       * -param {String} body
       * -param {Object} [options]
       *
       * -throws {TypeError}
       *
       */
  
    }, {
      key: "sendMessage",
      value: function sendMessage(target, body, options) {
        debug('sendMessage()');
        var message = new Message(this);
        message.send(target, body, options);
        return message;
      }
      /**
       * Terminate ongoing sessions.
       */
  
    }, {
      key: "terminateSessions",
      value: function terminateSessions(options) {
        debug('terminateSessions()');
  
        for (var idx in this._sessions) {
          if (!this._sessions[idx].isEnded()) {
            this._sessions[idx].terminate(options);
          }
        }
      }
      /**
       * Gracefully close.
       *
       */
  
    }, {
      key: "stop",
      value: function stop() {
        var _this2 = this;
  
        debug('stop()'); // Remove dynamic settings.
  
        this._dynConfiguration = {};
  
        if (this._status === C.STATUS_USER_CLOSED) {
          debug('UA already closed');
          return;
        } // Close registrator.
  
  
        this._registrator.close(); // If there are session wait a bit so CANCEL/BYE can be sent and their responses received.
  
  
        var num_sessions = Object.keys(this._sessions).length; // Run  _terminate_ on every Session.
  
        for (var session in this._sessions) {
          if (Object.prototype.hasOwnProperty.call(this._sessions, session)) {
            debug("closing session ".concat(session));
  
            try {
              this._sessions[session].terminate();
            } catch (error) {}
          }
        } // Run  _close_ on every applicant.
  
  
        for (var applicant in this._applicants) {
          if (Object.prototype.hasOwnProperty.call(this._applicants, applicant)) try {
            this._applicants[applicant].close();
          } catch (error) {}
        }
  
        this._status = C.STATUS_USER_CLOSED;
        var num_transactions = Object.keys(this._transactions.nict).length + Object.keys(this._transactions.nist).length + Object.keys(this._transactions.ict).length + Object.keys(this._transactions.ist).length;
  
        if (num_transactions === 0 && num_sessions === 0) {
          this._transport.disconnect();
        } else {
          this._closeTimer = setTimeout(function () {
            _this2._closeTimer = null;
  
            _this2._transport.disconnect();
          }, 2000);
        }
      }
      /**
       * Normalice a string into a valid SIP request URI
       * -param {String} target
       * -returns {JsSIP.URI|undefined}
       */
  
    }, {
      key: "normalizeTarget",
      value: function normalizeTarget(target) {
        return Utils.normalizeTarget(target, this._configuration.hostport_params);
      }
      /**
       * Allow retrieving configuration and autogenerated fields in runtime.
       */
  
    }, {
      key: "get",
      value: function get(parameter) {
        switch (parameter) {
          case 'realm':
            return this._configuration.realm;
  
          case 'ha1':
            return this._configuration.ha1;
  
          default:
            debugerror('get() | cannot get "%s" parameter in runtime', parameter);
            return undefined;
        }
      }
      /**
       * Allow configuration changes in runtime.
       * Returns true if the parameter could be set.
       */
  
    }, {
      key: "set",
      value: function set(parameter, value) {
        switch (parameter) {
          case 'password':
            {
              this._configuration.password = String(value);
              break;
            }
  
          case 'realm':
            {
              this._configuration.realm = String(value);
              break;
            }
  
          case 'ha1':
            {
              this._configuration.ha1 = String(value); // Delete the plain SIP password.
  
              this._configuration.password = null;
              break;
            }
  
          case 'display_name':
            {
              this._configuration.display_name = value;
              break;
            }
  
          default:
            debugerror('set() | cannot set "%s" parameter in runtime', parameter);
            return false;
        }
  
        return true;
      } // ==========================
      // Event Handlers.
      // ==========================
  
      /**
       * new Transaction
       */
  
    }, {
      key: "newTransaction",
      value: function newTransaction(transaction) {
        this._transactions[transaction.type][transaction.id] = transaction;
        this.emit('newTransaction', {
          transaction: transaction
        });
      }
      /**
       * Transaction destroyed.
       */
  
    }, {
      key: "destroyTransaction",
      value: function destroyTransaction(transaction) {
        delete this._transactions[transaction.type][transaction.id];
        this.emit('transactionDestroyed', {
          transaction: transaction
        });
      }
      /**
       * new Dialog
       */
  
    }, {
      key: "newDialog",
      value: function newDialog(dialog) {
        this._dialogs[dialog.id] = dialog;
      }
      /**
       * Dialog destroyed.
       */
  
    }, {
      key: "destroyDialog",
      value: function destroyDialog(dialog) {
        delete this._dialogs[dialog.id];
      }
      /**
       *  new Message
       */
  
    }, {
      key: "newMessage",
      value: function newMessage(message, data) {
        this._applicants[message] = message;
        this.emit('newMessage', data);
      }
      /**
       *  Message destroyed.
       */
  
    }, {
      key: "destroyMessage",
      value: function destroyMessage(message) {
        delete this._applicants[message];
      }
      /**
       * new RTCSession
       */
  
    }, {
      key: "newRTCSession",
      value: function newRTCSession(session, data) {
        this._sessions[session.id] = session;
        this.emit('newRTCSession', data);
      }
      /**
       * RTCSession destroyed.
       */
  
    }, {
      key: "destroyRTCSession",
      value: function destroyRTCSession(session) {
        delete this._sessions[session.id];
      }
      /**
       * Registered
       */
  
    }, {
      key: "registered",
      value: function registered(data) {
        this.emit('registered', data);
      }
      /**
       * Unregistered
       */
  
    }, {
      key: "unregistered",
      value: function unregistered(data) {
        this.emit('unregistered', data);
      }
      /**
       * Registration Failed
       */
  
    }, {
      key: "registrationFailed",
      value: function registrationFailed(data) {
        this.emit('registrationFailed', data);
      } // =========================
      // ReceiveRequest.
      // =========================
  
      /**
       * Request reception
       */
  
    }, {
      key: "receiveRequest",
      value: function receiveRequest(request) {
        var method = request.method; // Check that request URI points to us.
  
        if (request.ruri.user !== this._configuration.uri.user && request.ruri.user !== this._contact.uri.user) {
          debug('Request-URI does not point to us');
  
          if (request.method !== JsSIP_C.ACK) {
            request.reply_sl(404);
          }
  
          return;
        } // Check request URI scheme.
  
  
        if (request.ruri.scheme === JsSIP_C.SIPS) {
          request.reply_sl(416);
          return;
        } // Check transaction.
  
  
        if (Transactions.checkTransaction(this, request)) {
          return;
        } // Create the server transaction.
  
  
        if (method === JsSIP_C.INVITE) {
          /* eslint-disable no-new */
          new Transactions.InviteServerTransaction(this, this._transport, request);
          /* eslint-enable no-new */
        } else if (method !== JsSIP_C.ACK && method !== JsSIP_C.CANCEL) {
          /* eslint-disable no-new */
          new Transactions.NonInviteServerTransaction(this, this._transport, request);
          /* eslint-enable no-new */
        }
        /* RFC3261 12.2.2
         * Requests that do not change in any way the state of a dialog may be
         * received within a dialog (for example, an OPTIONS request).
         * They are processed as if they had been received outside the dialog.
         */
  
  
        if (method === JsSIP_C.OPTIONS) {
          request.reply(200);
        } else if (method === JsSIP_C.MESSAGE) {
          if (this.listeners('newMessage').length === 0) {
            request.reply(405);
            return;
          }
  
          var message = new Message(this);
          message.init_incoming(request);
        } else if (method === JsSIP_C.INVITE) {
          // Initial INVITE.
          if (!request.to_tag && this.listeners('newRTCSession').length === 0) {
            request.reply(405);
            return;
          }
        }
  
        var dialog;
        var session; // Initial Request.
  
        if (!request.to_tag) {
          switch (method) {
            case JsSIP_C.INVITE:
              if (window.RTCPeerConnection) {
                // TODO
                if (request.hasHeader('replaces')) {
                  var replaces = request.replaces;
                  dialog = this._findDialog(replaces.call_id, replaces.from_tag, replaces.to_tag);
  
                  if (dialog) {
                    session = dialog.owner;
  
                    if (!session.isEnded()) {
                      session.receiveRequest(request);
                    } else {
                      request.reply(603);
                    }
                  } else {
                    request.reply(481);
                  }
                } else {
                  session = new RTCSession(this);
                  session.init_incoming(request);
                }
              } else {
                debugerror('INVITE received but WebRTC is not supported');
                request.reply(488);
              }
  
              break;
  
            case JsSIP_C.BYE:
              // Out of dialog BYE received.
              request.reply(481);
              break;
  
            case JsSIP_C.CANCEL:
              session = this._findSession(request);
  
              if (session) {
                session.receiveRequest(request);
              } else {
                debug('received CANCEL request for a non existent session');
              }
  
              break;
  
            case JsSIP_C.ACK:
              /* Absorb it.
               * ACK request without a corresponding Invite Transaction
               * and without To tag.
               */
              break;
  
            case JsSIP_C.NOTIFY:
              // Receive new sip event.
              this.emit('sipEvent', {
                event: request.event,
                request: request
              });
              request.reply(200);
              break;
  
            default:
              request.reply(405);
              break;
          }
        } // In-dialog request.
        else {
            dialog = this._findDialog(request.call_id, request.from_tag, request.to_tag);
  
            if (dialog) {
              dialog.receiveRequest(request);
            } else if (method === JsSIP_C.NOTIFY) {
              session = this._findSession(request);
  
              if (session) {
                session.receiveRequest(request);
              } else {
                debug('received NOTIFY request for a non existent subscription');
                request.reply(481, 'Subscription does not exist');
              }
            }
            /* RFC3261 12.2.2
             * Request with to tag, but no matching dialog found.
             * Exception: ACK for an Invite request for which a dialog has not
             * been created.
             */
            else if (method !== JsSIP_C.ACK) {
                request.reply(481);
              }
          }
      } // =================
      // Utils.
      // =================
  
      /**
       * Get the session to which the request belongs to, if any.
       */
  
    }, {
      key: "_findSession",
      value: function _findSession(_ref) {
        var call_id = _ref.call_id,
            from_tag = _ref.from_tag,
            to_tag = _ref.to_tag;
        var sessionIDa = call_id + from_tag;
        var sessionA = this._sessions[sessionIDa];
        var sessionIDb = call_id + to_tag;
        var sessionB = this._sessions[sessionIDb];
  
        if (sessionA) {
          return sessionA;
        } else if (sessionB) {
          return sessionB;
        } else {
          return null;
        }
      }
      /**
       * Get the dialog to which the request belongs to, if any.
       */
  
    }, {
      key: "_findDialog",
      value: function _findDialog(call_id, from_tag, to_tag) {
        var id = call_id + from_tag + to_tag;
        var dialog = this._dialogs[id];
  
        if (dialog) {
          return dialog;
        } else {
          id = call_id + to_tag + from_tag;
          dialog = this._dialogs[id];
  
          if (dialog) {
            return dialog;
          } else {
            return null;
          }
        }
      }
    }, {
      key: "_loadConfig",
      value: function _loadConfig(configuration) {
        // Check and load the given configuration.
        try {
          config.load(this._configuration, configuration);
        } catch (e) {
          throw e;
        } // Post Configuration Process.
        // Allow passing 0 number as display_name.
  
  
        if (this._configuration.display_name === 0) {
          this._configuration.display_name = '0';
        } // Instance-id for GRUU.
  
  
        if (!this._configuration.instance_id) {
          this._configuration.instance_id = Utils.newUUID();
        } // Jssip_id instance parameter. Static random tag of length 5.
  
  
        this._configuration.jssip_id = Utils.createRandomToken(5); // String containing this._configuration.uri without scheme and user.
  
        var hostport_params = this._configuration.uri.clone();
  
        hostport_params.user = null;
        this._configuration.hostport_params = hostport_params.toString().replace(/^sip:/i, ''); // Transport.
  
        try {
          this._transport = new Transport(this._configuration.sockets, {
            // Recovery options.
            max_interval: this._configuration.connection_recovery_max_interval,
            min_interval: this._configuration.connection_recovery_min_interval
          }); // Transport event callbacks.
  
          this._transport.onconnecting = onTransportConnecting.bind(this);
          this._transport.onconnect = onTransportConnect.bind(this);
          this._transport.ondisconnect = onTransportDisconnect.bind(this);
          this._transport.ondata = onTransportData.bind(this);
        } catch (e) {
          debugerror(e);
          throw new Exceptions.ConfigurationError('sockets', this._configuration.sockets);
        } // Remove sockets instance from configuration object.
  
  
        delete this._configuration.sockets; // Check whether authorization_user is explicitly defined.
        // Take 'this._configuration.uri.user' value if not.
  
        if (!this._configuration.authorization_user) {
          this._configuration.authorization_user = this._configuration.uri.user;
        } // If no 'registrar_server' is set use the 'uri' value without user portion and
        // without URI params/headers.
  
  
        if (!this._configuration.registrar_server) {
          var registrar_server = this._configuration.uri.clone();
  
          registrar_server.user = null;
          registrar_server.clearParams();
          registrar_server.clearHeaders();
          this._configuration.registrar_server = registrar_server;
        } // User no_answer_timeout.
  
  
        this._configuration.no_answer_timeout *= 1000; // Via Host.
  
        if (this._configuration.contact_uri) {
          this._configuration.via_host = this._configuration.contact_uri.host;
        } // Contact URI.
        else {
            this._configuration.contact_uri = new URI('sip', Utils.createRandomToken(8), this._configuration.via_host, null, {
              transport: 'ws'
            });
          }
  
        this._contact = {
          pub_gruu: null,
          temp_gruu: null,
          uri: this._configuration.contact_uri,
          toString: function toString() {
            var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
            var anonymous = options.anonymous || null;
            var outbound = options.outbound || null;
            var contact = '<';
  
            if (anonymous) {
              contact += this.temp_gruu || 'sip:anonymous@anonymous.invalid;transport=ws';
            } else {
              contact += this.pub_gruu || this.uri.toString();
            }
  
            if (outbound && (anonymous ? !this.temp_gruu : !this.pub_gruu)) {
              contact += ';ob';
            }
  
            contact += '>';
            return contact;
          }
        }; // Seal the configuration.
  
        var writable_parameters = ['password', 'realm', 'ha1', 'display_name', 'register'];
  
        for (var parameter in this._configuration) {
          if (Object.prototype.hasOwnProperty.call(this._configuration, parameter)) {
            if (writable_parameters.indexOf(parameter) !== -1) {
              Object.defineProperty(this._configuration, parameter, {
                writable: true,
                configurable: false
              });
            } else {
              Object.defineProperty(this._configuration, parameter, {
                writable: false,
                configurable: false
              });
            }
          }
        }
  
        debug('configuration parameters after validation:');
  
        for (var _parameter in this._configuration) {
          // Only show the user user configurable parameters.
          if (Object.prototype.hasOwnProperty.call(config.settings, _parameter)) {
            switch (_parameter) {
              case 'uri':
              case 'registrar_server':
                debug("- ".concat(_parameter, ": ").concat(this._configuration[_parameter]));
                break;
  
              case 'password':
              case 'ha1':
                debug("- ".concat(_parameter, ": NOT SHOWN"));
                break;
  
              default:
                debug("- ".concat(_parameter, ": ").concat(JSON.stringify(this._configuration[_parameter])));
            }
          }
        }
  
        return;
      }
    }, {
      key: "C",
      get: function get() {
        return C;
      }
    }, {
      key: "status",
      get: function get() {
        return this._status;
      }
    }, {
      key: "contact",
      get: function get() {
        return this._contact;
      }
    }, {
      key: "configuration",
      get: function get() {
        return this._configuration;
      }
    }, {
      key: "transport",
      get: function get() {
        return this._transport;
      }
    }]);
  
    return UA;
  }(EventEmitter);
  /**
   * Transport event handlers
   */
  // Transport connecting event.
  
  
  function onTransportConnecting(data) {
    this.emit('connecting', data);
  } // Transport connected event.
  
  
  function onTransportConnect(data) {
    if (this._status === C.STATUS_USER_CLOSED) {
      return;
    }
  
    this._status = C.STATUS_READY;
    this._error = null;
    this.emit('connected', data);
  
    if (this._dynConfiguration.register) {
      this._registrator.register();
    }
  } // Transport disconnected event.
  
  
  function onTransportDisconnect(data) {
    // Run _onTransportError_ callback on every client transaction using _transport_.
    var client_transactions = ['nict', 'ict', 'nist', 'ist'];
  
    for (var _i = 0, _client_transactions = client_transactions; _i < _client_transactions.length; _i++) {
      var type = _client_transactions[_i];
  
      for (var id in this._transactions[type]) {
        if (Object.prototype.hasOwnProperty.call(this._transactions[type], id)) {
          this._transactions[type][id].onTransportError();
        }
      }
    }
  
    this.emit('disconnected', data); // Call registrator _onTransportClosed_.
  
    this._registrator.onTransportClosed();
  
    if (this._status !== C.STATUS_USER_CLOSED) {
      this._status = C.STATUS_NOT_READY;
      this._error = C.NETWORK_ERROR;
    }
  } // Transport data event.
  
  
  function onTransportData(data) {
    var transport = data.transport;
    var message = data.message;
    message = Parser.parseMessage(message, this);
  
    if (!message) {
      return;
    }
  
    if (this._status === C.STATUS_USER_CLOSED && message instanceof SIPMessage.IncomingRequest) {
      return;
    } // Do some sanity check.
  
  
    if (!sanityCheck(message, this, transport)) {
      return;
    }
  
    if (message instanceof SIPMessage.IncomingRequest) {
      message.transport = transport;
      this.receiveRequest(message);
    } else if (message instanceof SIPMessage.IncomingResponse) {
      /* Unike stated in 18.1.2, if a response does not match
      * any transaction, it is discarded here and no passed to the core
      * in order to be discarded there.
      */
      var transaction;
  
      switch (message.method) {
        case JsSIP_C.INVITE:
          transaction = this._transactions.ict[message.via_branch];
  
          if (transaction) {
            transaction.receiveResponse(message);
          }
  
          break;
  
        case JsSIP_C.ACK:
          // Just in case ;-).
          break;
  
        default:
          transaction = this._transactions.nict[message.via_branch];
  
          if (transaction) {
            transaction.receiveResponse(message);
          }
  
          break;
      }
    }
  }
  },{"./Config":1,"./Constants":2,"./Exceptions":6,"./Message":9,"./Parser":11,"./RTCSession":12,"./Registrator":17,"./SIPMessage":19,"./Transactions":22,"./Transport":23,"./URI":25,"./Utils":26,"./sanityCheck":28,"debug":30,"events":29}],25:[function(require,module,exports){
  "use strict";
  
  function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var it, normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var JsSIP_C = require('./Constants');
  
  var Utils = require('./Utils');
  
  var Grammar = require('./Grammar');
  /**
   * -param {String} [scheme]
   * -param {String} [user]
   * -param {String} host
   * -param {String} [port]
   * -param {Object} [parameters]
   * -param {Object} [headers]
   *
   */
  
  
  module.exports = /*#__PURE__*/function () {
    _createClass(URI, null, [{
      key: "parse",
  
      /**
        * Parse the given string and returns a JsSIP.URI instance or undefined if
        * it is an invalid URI.
        */
      value: function parse(uri) {
        uri = Grammar.parse(uri, 'SIP_URI');
  
        if (uri !== -1) {
          return uri;
        } else {
          return undefined;
        }
      }
    }]);
  
    function URI(scheme, user, host, port) {
      var parameters = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : {};
      var headers = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : {};
  
      _classCallCheck(this, URI);
  
      // Checks.
      if (!host) {
        throw new TypeError('missing or invalid "host" parameter');
      } // Initialize parameters.
  
  
      this._parameters = {};
      this._headers = {};
      this._scheme = scheme || JsSIP_C.SIP;
      this._user = user;
      this._host = host;
      this._port = port;
  
      for (var param in parameters) {
        if (Object.prototype.hasOwnProperty.call(parameters, param)) {
          this.setParam(param, parameters[param]);
        }
      }
  
      for (var header in headers) {
        if (Object.prototype.hasOwnProperty.call(headers, header)) {
          this.setHeader(header, headers[header]);
        }
      }
    }
  
    _createClass(URI, [{
      key: "setParam",
      value: function setParam(key, value) {
        if (key) {
          this._parameters[key.toLowerCase()] = typeof value === 'undefined' || value === null ? null : value.toString();
        }
      }
    }, {
      key: "getParam",
      value: function getParam(key) {
        if (key) {
          return this._parameters[key.toLowerCase()];
        }
      }
    }, {
      key: "hasParam",
      value: function hasParam(key) {
        if (key) {
          return this._parameters.hasOwnProperty(key.toLowerCase()) && true || false;
        }
      }
    }, {
      key: "deleteParam",
      value: function deleteParam(parameter) {
        parameter = parameter.toLowerCase();
  
        if (this._parameters.hasOwnProperty(parameter)) {
          var value = this._parameters[parameter];
          delete this._parameters[parameter];
          return value;
        }
      }
    }, {
      key: "clearParams",
      value: function clearParams() {
        this._parameters = {};
      }
    }, {
      key: "setHeader",
      value: function setHeader(name, value) {
        this._headers[Utils.headerize(name)] = Array.isArray(value) ? value : [value];
      }
    }, {
      key: "getHeader",
      value: function getHeader(name) {
        if (name) {
          return this._headers[Utils.headerize(name)];
        }
      }
    }, {
      key: "hasHeader",
      value: function hasHeader(name) {
        if (name) {
          return this._headers.hasOwnProperty(Utils.headerize(name)) && true || false;
        }
      }
    }, {
      key: "deleteHeader",
      value: function deleteHeader(header) {
        header = Utils.headerize(header);
  
        if (this._headers.hasOwnProperty(header)) {
          var value = this._headers[header];
          delete this._headers[header];
          return value;
        }
      }
    }, {
      key: "clearHeaders",
      value: function clearHeaders() {
        this._headers = {};
      }
    }, {
      key: "clone",
      value: function clone() {
        return new URI(this._scheme, this._user, this._host, this._port, JSON.parse(JSON.stringify(this._parameters)), JSON.parse(JSON.stringify(this._headers)));
      }
    }, {
      key: "toString",
      value: function toString() {
        var headers = [];
        var uri = "".concat(this._scheme, ":");
  
        if (this._user) {
          uri += "".concat(Utils.escapeUser(this._user), "@");
        }
  
        uri += this._host;
  
        if (this._port || this._port === 0) {
          uri += ":".concat(this._port);
        }
  
        for (var parameter in this._parameters) {
          if (Object.prototype.hasOwnProperty.call(this._parameters, parameter)) {
            uri += ";".concat(parameter);
  
            if (this._parameters[parameter] !== null) {
              uri += "=".concat(this._parameters[parameter]);
            }
          }
        }
  
        for (var header in this._headers) {
          if (Object.prototype.hasOwnProperty.call(this._headers, header)) {
            var _iterator = _createForOfIteratorHelper(this._headers[header]),
                _step;
  
            try {
              for (_iterator.s(); !(_step = _iterator.n()).done;) {
                var item = _step.value;
                headers.push("".concat(header, "=").concat(item));
              }
            } catch (err) {
              _iterator.e(err);
            } finally {
              _iterator.f();
            }
          }
        }
  
        if (headers.length > 0) {
          uri += "?".concat(headers.join('&'));
        }
  
        return uri;
      }
    }, {
      key: "toAor",
      value: function toAor(show_port) {
        var aor = "".concat(this._scheme, ":");
  
        if (this._user) {
          aor += "".concat(Utils.escapeUser(this._user), "@");
        }
  
        aor += this._host;
  
        if (show_port && (this._port || this._port === 0)) {
          aor += ":".concat(this._port);
        }
  
        return aor;
      }
    }, {
      key: "scheme",
      get: function get() {
        return this._scheme;
      },
      set: function set(value) {
        this._scheme = value.toLowerCase();
      }
    }, {
      key: "user",
      get: function get() {
        return this._user;
      },
      set: function set(value) {
        this._user = value;
      }
    }, {
      key: "host",
      get: function get() {
        return this._host;
      },
      set: function set(value) {
        this._host = value.toLowerCase();
      }
    }, {
      key: "port",
      get: function get() {
        return this._port;
      },
      set: function set(value) {
        this._port = value === 0 ? value : parseInt(value, 10) || null;
      }
    }]);
  
    return URI;
  }();
  },{"./Constants":2,"./Grammar":7,"./Utils":26}],26:[function(require,module,exports){
  "use strict";
  
  function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
  
  function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var it, normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
  
  var JsSIP_C = require('./Constants');
  
  var URI = require('./URI');
  
  var Grammar = require('./Grammar');
  
  exports.str_utf8_length = function (string) {
    return unescape(encodeURIComponent(string)).length;
  }; // Used by 'hasMethods'.
  
  
  var isFunction = exports.isFunction = function (fn) {
    if (fn !== undefined) {
      return Object.prototype.toString.call(fn) === '[object Function]' ? true : false;
    } else {
      return false;
    }
  };
  
  exports.isString = function (str) {
    if (str !== undefined) {
      return Object.prototype.toString.call(str) === '[object String]' ? true : false;
    } else {
      return false;
    }
  };
  
  exports.isDecimal = function (num) {
    return !isNaN(num) && parseFloat(num) === parseInt(num, 10);
  };
  
  exports.isEmpty = function (value) {
    return value === null || value === '' || value === undefined || Array.isArray(value) && value.length === 0 || typeof value === 'number' && isNaN(value);
  };
  
  exports.hasMethods = function (obj) {
    for (var _len = arguments.length, methodNames = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      methodNames[_key - 1] = arguments[_key];
    }
  
    for (var _i = 0, _methodNames = methodNames; _i < _methodNames.length; _i++) {
      var methodName = _methodNames[_i];
  
      if (isFunction(obj[methodName])) {
        return false;
      }
    }
  
    return true;
  }; // Used by 'newTag'.
  
  
  var createRandomToken = exports.createRandomToken = function (size) {
    var base = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 32;
    var i,
        r,
        token = '';
  
    for (i = 0; i < size; i++) {
      r = Math.random() * base | 0;
      token += r.toString(base);
    }
  
    return token;
  };
  
  exports.newTag = function () {
    return createRandomToken(10);
  }; // https://stackoverflow.com/users/109538/broofa.
  
  
  exports.newUUID = function () {
    var UUID = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
      var r = Math.random() * 16 | 0,
          v = c === 'x' ? r : r & 0x3 | 0x8;
      return v.toString(16);
    });
    return UUID;
  };
  
  exports.hostType = function (host) {
    if (!host) {
      return;
    } else {
      host = Grammar.parse(host, 'host');
  
      if (host !== -1) {
        return host.host_type;
      }
    }
  };
  /**
  * Hex-escape a SIP URI user.
  * Don't hex-escape ':' (%3A), '+' (%2B), '?' (%3F"), '/' (%2F).
  *
  * Used by 'normalizeTarget'.
  */
  
  
  var escapeUser = exports.escapeUser = function (user) {
    return encodeURIComponent(decodeURIComponent(user)).replace(/%3A/ig, ':').replace(/%2B/ig, '+').replace(/%3F/ig, '?').replace(/%2F/ig, '/');
  };
  /**
  * Normalize SIP URI.
  * NOTE: It does not allow a SIP URI without username.
  * Accepts 'sip', 'sips' and 'tel' URIs and convert them into 'sip'.
  * Detects the domain part (if given) and properly hex-escapes the user portion.
  * If the user portion has only 'tel' number symbols the user portion is clean of 'tel' visual separators.
  */
  
  
  exports.normalizeTarget = function (target, domain) {
    // If no target is given then raise an error.
    if (!target) {
      return; // If a URI instance is given then return it.
    } else if (target instanceof URI) {
      return target; // If a string is given split it by '@':
      // - Last fragment is the desired domain.
      // - Otherwise append the given domain argument.
    } else if (typeof target === 'string') {
      var target_array = target.split('@');
      var target_user;
      var target_domain;
  
      switch (target_array.length) {
        case 1:
          if (!domain) {
            return;
          }
  
          target_user = target;
          target_domain = domain;
          break;
  
        case 2:
          target_user = target_array[0];
          target_domain = target_array[1];
          break;
  
        default:
          target_user = target_array.slice(0, target_array.length - 1).join('@');
          target_domain = target_array[target_array.length - 1];
      } // Remove the URI scheme (if present).
  
  
      target_user = target_user.replace(/^(sips?|tel):/i, ''); // Remove 'tel' visual separators if the user portion just contains 'tel' number symbols.
  
      if (/^[-.()]*\+?[0-9\-.()]+$/.test(target_user)) {
        target_user = target_user.replace(/[-.()]/g, '');
      } // Build the complete SIP URI.
  
  
      target = "".concat(JsSIP_C.SIP, ":").concat(escapeUser(target_user), "@").concat(target_domain); // Finally parse the resulting URI.
  
      var uri;
  
      if (uri = URI.parse(target)) {
        return uri;
      } else {
        return;
      }
    } else {
      return;
    }
  };
  
  exports.headerize = function (string) {
    var exceptions = {
      'Call-Id': 'Call-ID',
      'Cseq': 'CSeq',
      'Www-Authenticate': 'WWW-Authenticate'
    };
    var name = string.toLowerCase().replace(/_/g, '-').split('-');
    var hname = '';
    var parts = name.length;
    var part;
  
    for (part = 0; part < parts; part++) {
      if (part !== 0) {
        hname += '-';
      }
  
      hname += name[part].charAt(0).toUpperCase() + name[part].substring(1);
    }
  
    if (exceptions[hname]) {
      hname = exceptions[hname];
    }
  
    return hname;
  };
  
  exports.sipErrorCause = function (status_code) {
    for (var cause in JsSIP_C.SIP_ERROR_CAUSES) {
      if (JsSIP_C.SIP_ERROR_CAUSES[cause].indexOf(status_code) !== -1) {
        return JsSIP_C.causes[cause];
      }
    }
  
    return JsSIP_C.causes.SIP_FAILURE_CODE;
  };
  /**
  * Generate a random Test-Net IP (https://tools.ietf.org/html/rfc5735)
  */
  
  
  exports.getRandomTestNetIP = function () {
    function getOctet(from, to) {
      return Math.floor(Math.random() * (to - from + 1) + from);
    }
  
    return "192.0.2.".concat(getOctet(1, 254));
  }; // MD5 (Message-Digest Algorithm) https://www.webtoolkit.info.
  
  
  exports.calculateMD5 = function (string) {
    function rotateLeft(lValue, iShiftBits) {
      return lValue << iShiftBits | lValue >>> 32 - iShiftBits;
    }
  
    function addUnsigned(lX, lY) {
      var lX8 = lX & 0x80000000;
      var lY8 = lY & 0x80000000;
      var lX4 = lX & 0x40000000;
      var lY4 = lY & 0x40000000;
      var lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
  
      if (lX4 & lY4) {
        return lResult ^ 0x80000000 ^ lX8 ^ lY8;
      }
  
      if (lX4 | lY4) {
        if (lResult & 0x40000000) {
          return lResult ^ 0xC0000000 ^ lX8 ^ lY8;
        } else {
          return lResult ^ 0x40000000 ^ lX8 ^ lY8;
        }
      } else {
        return lResult ^ lX8 ^ lY8;
      }
    }
  
    function doF(x, y, z) {
      return x & y | ~x & z;
    }
  
    function doG(x, y, z) {
      return x & z | y & ~z;
    }
  
    function doH(x, y, z) {
      return x ^ y ^ z;
    }
  
    function doI(x, y, z) {
      return y ^ (x | ~z);
    }
  
    function doFF(a, b, c, d, x, s, ac) {
      a = addUnsigned(a, addUnsigned(addUnsigned(doF(b, c, d), x), ac));
      return addUnsigned(rotateLeft(a, s), b);
    }
  
    function doGG(a, b, c, d, x, s, ac) {
      a = addUnsigned(a, addUnsigned(addUnsigned(doG(b, c, d), x), ac));
      return addUnsigned(rotateLeft(a, s), b);
    }
  
    function doHH(a, b, c, d, x, s, ac) {
      a = addUnsigned(a, addUnsigned(addUnsigned(doH(b, c, d), x), ac));
      return addUnsigned(rotateLeft(a, s), b);
    }
  
    function doII(a, b, c, d, x, s, ac) {
      a = addUnsigned(a, addUnsigned(addUnsigned(doI(b, c, d), x), ac));
      return addUnsigned(rotateLeft(a, s), b);
    }
  
    function convertToWordArray(str) {
      var lWordCount;
      var lMessageLength = str.length;
      var lNumberOfWords_temp1 = lMessageLength + 8;
      var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - lNumberOfWords_temp1 % 64) / 64;
      var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
      var lWordArray = new Array(lNumberOfWords - 1);
      var lBytePosition = 0;
      var lByteCount = 0;
  
      while (lByteCount < lMessageLength) {
        lWordCount = (lByteCount - lByteCount % 4) / 4;
        lBytePosition = lByteCount % 4 * 8;
        lWordArray[lWordCount] = lWordArray[lWordCount] | str.charCodeAt(lByteCount) << lBytePosition;
        lByteCount++;
      }
  
      lWordCount = (lByteCount - lByteCount % 4) / 4;
      lBytePosition = lByteCount % 4 * 8;
      lWordArray[lWordCount] = lWordArray[lWordCount] | 0x80 << lBytePosition;
      lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
      lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
      return lWordArray;
    }
  
    function wordToHex(lValue) {
      var wordToHexValue = '',
          wordToHexValue_temp = '',
          lByte,
          lCount;
  
      for (lCount = 0; lCount <= 3; lCount++) {
        lByte = lValue >>> lCount * 8 & 255;
        wordToHexValue_temp = "0".concat(lByte.toString(16));
        wordToHexValue = wordToHexValue + wordToHexValue_temp.substr(wordToHexValue_temp.length - 2, 2);
      }
  
      return wordToHexValue;
    }
  
    function utf8Encode(str) {
      str = str.replace(/\r\n/g, '\n');
      var utftext = '';
  
      for (var n = 0; n < str.length; n++) {
        var _c = str.charCodeAt(n);
  
        if (_c < 128) {
          utftext += String.fromCharCode(_c);
        } else if (_c > 127 && _c < 2048) {
          utftext += String.fromCharCode(_c >> 6 | 192);
          utftext += String.fromCharCode(_c & 63 | 128);
        } else {
          utftext += String.fromCharCode(_c >> 12 | 224);
          utftext += String.fromCharCode(_c >> 6 & 63 | 128);
          utftext += String.fromCharCode(_c & 63 | 128);
        }
      }
  
      return utftext;
    }
  
    var x = [];
    var k, AA, BB, CC, DD, a, b, c, d;
    var S11 = 7,
        S12 = 12,
        S13 = 17,
        S14 = 22;
    var S21 = 5,
        S22 = 9,
        S23 = 14,
        S24 = 20;
    var S31 = 4,
        S32 = 11,
        S33 = 16,
        S34 = 23;
    var S41 = 6,
        S42 = 10,
        S43 = 15,
        S44 = 21;
    string = utf8Encode(string);
    x = convertToWordArray(string);
    a = 0x67452301;
    b = 0xEFCDAB89;
    c = 0x98BADCFE;
    d = 0x10325476;
  
    for (k = 0; k < x.length; k += 16) {
      AA = a;
      BB = b;
      CC = c;
      DD = d;
      a = doFF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
      d = doFF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
      c = doFF(c, d, a, b, x[k + 2], S13, 0x242070DB);
      b = doFF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
      a = doFF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
      d = doFF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
      c = doFF(c, d, a, b, x[k + 6], S13, 0xA8304613);
      b = doFF(b, c, d, a, x[k + 7], S14, 0xFD469501);
      a = doFF(a, b, c, d, x[k + 8], S11, 0x698098D8);
      d = doFF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
      c = doFF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
      b = doFF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
      a = doFF(a, b, c, d, x[k + 12], S11, 0x6B901122);
      d = doFF(d, a, b, c, x[k + 13], S12, 0xFD987193);
      c = doFF(c, d, a, b, x[k + 14], S13, 0xA679438E);
      b = doFF(b, c, d, a, x[k + 15], S14, 0x49B40821);
      a = doGG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
      d = doGG(d, a, b, c, x[k + 6], S22, 0xC040B340);
      c = doGG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
      b = doGG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
      a = doGG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
      d = doGG(d, a, b, c, x[k + 10], S22, 0x2441453);
      c = doGG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
      b = doGG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
      a = doGG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
      d = doGG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
      c = doGG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
      b = doGG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
      a = doGG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
      d = doGG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
      c = doGG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
      b = doGG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
      a = doHH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
      d = doHH(d, a, b, c, x[k + 8], S32, 0x8771F681);
      c = doHH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
      b = doHH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
      a = doHH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
      d = doHH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
      c = doHH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
      b = doHH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
      a = doHH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
      d = doHH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
      c = doHH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
      b = doHH(b, c, d, a, x[k + 6], S34, 0x4881D05);
      a = doHH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
      d = doHH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
      c = doHH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
      b = doHH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
      a = doII(a, b, c, d, x[k + 0], S41, 0xF4292244);
      d = doII(d, a, b, c, x[k + 7], S42, 0x432AFF97);
      c = doII(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
      b = doII(b, c, d, a, x[k + 5], S44, 0xFC93A039);
      a = doII(a, b, c, d, x[k + 12], S41, 0x655B59C3);
      d = doII(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
      c = doII(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
      b = doII(b, c, d, a, x[k + 1], S44, 0x85845DD1);
      a = doII(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
      d = doII(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
      c = doII(c, d, a, b, x[k + 6], S43, 0xA3014314);
      b = doII(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
      a = doII(a, b, c, d, x[k + 4], S41, 0xF7537E82);
      d = doII(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
      c = doII(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
      b = doII(b, c, d, a, x[k + 9], S44, 0xEB86D391);
      a = addUnsigned(a, AA);
      b = addUnsigned(b, BB);
      c = addUnsigned(c, CC);
      d = addUnsigned(d, DD);
    }
  
    var temp = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
    return temp.toLowerCase();
  };
  
  exports.closeMediaStream = function (stream) {
    if (!stream) {
      return;
    } // Latest spec states that MediaStream has no stop() method and instead must
    // call stop() on every MediaStreamTrack.
  
  
    try {
      var tracks;
  
      if (stream.getTracks) {
        tracks = stream.getTracks();
  
        var _iterator = _createForOfIteratorHelper(tracks),
            _step;
  
        try {
          for (_iterator.s(); !(_step = _iterator.n()).done;) {
            var track = _step.value;
            track.stop();
          }
        } catch (err) {
          _iterator.e(err);
        } finally {
          _iterator.f();
        }
      } else {
        tracks = stream.getAudioTracks();
  
        var _iterator2 = _createForOfIteratorHelper(tracks),
            _step2;
  
        try {
          for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
            var _track = _step2.value;
  
            _track.stop();
          }
        } catch (err) {
          _iterator2.e(err);
        } finally {
          _iterator2.f();
        }
  
        tracks = stream.getVideoTracks();
  
        var _iterator3 = _createForOfIteratorHelper(tracks),
            _step3;
  
        try {
          for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
            var _track2 = _step3.value;
  
            _track2.stop();
          }
        } catch (err) {
          _iterator3.e(err);
        } finally {
          _iterator3.f();
        }
      }
    } catch (error) {
      // Deprecated by the spec, but still in use.
      // NOTE: In Temasys IE plugin stream.stop is a callable 'object'.
      if (typeof stream.stop === 'function' || _typeof(stream.stop) === 'object') {
        stream.stop();
      }
    }
  };
  
  exports.cloneArray = function (array) {
    return array && array.slice() || [];
  };
  },{"./Constants":2,"./Grammar":7,"./URI":25}],27:[function(require,module,exports){
  "use strict";
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var Grammar = require('./Grammar');
  
  var debug = require('debug')('JsSIP:WebSocketInterface');
  
  var debugerror = require('debug')('JsSIP:ERROR:WebSocketInterface');
  
  debugerror.log = console.warn.bind(console);
  
  module.exports = /*#__PURE__*/function () {
    function WebSocketInterface(url) {
      _classCallCheck(this, WebSocketInterface);
  
      debug('new() [url:"%s"]', url);
      this._url = url;
      this._sip_uri = null;
      this._via_transport = null;
      this._ws = null;
      var parsed_url = Grammar.parse(url, 'absoluteURI');
  
      if (parsed_url === -1) {
        debugerror("invalid WebSocket URI: ".concat(url));
        throw new TypeError("Invalid argument: ".concat(url));
      } else if (parsed_url.scheme !== 'wss' && parsed_url.scheme !== 'ws') {
        debugerror("invalid WebSocket URI scheme: ".concat(parsed_url.scheme));
        throw new TypeError("Invalid argument: ".concat(url));
      } else {
        this._sip_uri = "sip:".concat(parsed_url.host).concat(parsed_url.port ? ":".concat(parsed_url.port) : '', ";transport=ws");
        this._via_transport = parsed_url.scheme.toUpperCase();
      }
    }
  
    _createClass(WebSocketInterface, [{
      key: "connect",
      value: function connect() {
        debug('connect()');
  
        if (this.isConnected()) {
          debug("WebSocket ".concat(this._url, " is already connected"));
          return;
        } else if (this.isConnecting()) {
          debug("WebSocket ".concat(this._url, " is connecting"));
          return;
        }
  
        if (this._ws) {
          this.disconnect();
        }
  
        debug("connecting to WebSocket ".concat(this._url));
  
        try {
          this._ws = new WebSocket(this._url, 'sip');
          this._ws.binaryType = 'arraybuffer';
          this._ws.onopen = this._onOpen.bind(this);
          this._ws.onclose = this._onClose.bind(this);
          this._ws.onmessage = this._onMessage.bind(this);
          this._ws.onerror = this._onError.bind(this);
        } catch (e) {
          this._onError(e);
        }
      }
    }, {
      key: "disconnect",
      value: function disconnect() {
        debug('disconnect()');
  
        if (this._ws) {
          // Unbind websocket event callbacks.
          this._ws.onopen = function () {};
  
          this._ws.onclose = function () {};
  
          this._ws.onmessage = function () {};
  
          this._ws.onerror = function () {};
  
          this._ws.close();
  
          this._ws = null;
        }
      }
    }, {
      key: "send",
      value: function send(message) {
        debug('send()');
  
        if (this.isConnected()) {
          this._ws.send(message);
  
          return true;
        } else {
          debugerror('unable to send message, WebSocket is not open');
          return false;
        }
      }
    }, {
      key: "isConnected",
      value: function isConnected() {
        return this._ws && this._ws.readyState === this._ws.OPEN;
      }
    }, {
      key: "isConnecting",
      value: function isConnecting() {
        return this._ws && this._ws.readyState === this._ws.CONNECTING;
      }
      /**
       * WebSocket Event Handlers
       */
  
    }, {
      key: "_onOpen",
      value: function _onOpen() {
        debug("WebSocket ".concat(this._url, " connected"));
        this.onconnect();
      }
    }, {
      key: "_onClose",
      value: function _onClose(_ref) {
        var wasClean = _ref.wasClean,
            code = _ref.code,
            reason = _ref.reason;
        debug("WebSocket ".concat(this._url, " closed"));
  
        if (wasClean === false) {
          debug('WebSocket abrupt disconnection');
        }
  
        var data = {
          socket: this,
          error: !wasClean,
          code: code,
          reason: reason
        };
        this.ondisconnect(data);
      }
    }, {
      key: "_onMessage",
      value: function _onMessage(_ref2) {
        var data = _ref2.data;
        debug('received WebSocket message');
        this.ondata(data);
      }
    }, {
      key: "_onError",
      value: function _onError(e) {
        debugerror("WebSocket ".concat(this._url, " error: ").concat(e));
      }
    }, {
      key: "via_transport",
      get: function get() {
        return this._via_transport;
      },
      set: function set(value) {
        this._via_transport = value.toUpperCase();
      }
    }, {
      key: "sip_uri",
      get: function get() {
        return this._sip_uri;
      }
    }, {
      key: "url",
      get: function get() {
        return this._url;
      }
    }]);
  
    return WebSocketInterface;
  }();
  },{"./Grammar":7,"debug":30}],28:[function(require,module,exports){
  "use strict";
  
  function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var it, normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
  
  var JsSIP_C = require('./Constants');
  
  var SIPMessage = require('./SIPMessage');
  
  var Utils = require('./Utils');
  
  var debug = require('debug')('JsSIP:sanityCheck'); // Checks for requests and responses.
  
  
  var all = [minimumHeaders]; // Checks for requests.
  
  var requests = [rfc3261_8_2_2_1, rfc3261_16_3_4, rfc3261_18_3_request, rfc3261_8_2_2_2]; // Checks for responses.
  
  var responses = [rfc3261_8_1_3_3, rfc3261_18_3_response]; // local variables.
  
  var message;
  var ua;
  var transport;
  
  module.exports = function (m, u, t) {
    message = m;
    ua = u;
    transport = t;
  
    var _iterator = _createForOfIteratorHelper(all),
        _step;
  
    try {
      for (_iterator.s(); !(_step = _iterator.n()).done;) {
        var _check2 = _step.value;
  
        if (_check2() === false) {
          return false;
        }
      }
    } catch (err) {
      _iterator.e(err);
    } finally {
      _iterator.f();
    }
  
    if (message instanceof SIPMessage.IncomingRequest) {
      var _iterator2 = _createForOfIteratorHelper(requests),
          _step2;
  
      try {
        for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
          var check = _step2.value;
  
          if (check() === false) {
            return false;
          }
        }
      } catch (err) {
        _iterator2.e(err);
      } finally {
        _iterator2.f();
      }
    } else if (message instanceof SIPMessage.IncomingResponse) {
      var _iterator3 = _createForOfIteratorHelper(responses),
          _step3;
  
      try {
        for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
          var _check = _step3.value;
  
          if (_check() === false) {
            return false;
          }
        }
      } catch (err) {
        _iterator3.e(err);
      } finally {
        _iterator3.f();
      }
    } // Everything is OK.
  
  
    return true;
  };
  /*
   * Sanity Check for incoming Messages
   *
   * Requests:
   *  - _rfc3261_8_2_2_1_ Receive a Request with a non supported URI scheme
   *  - _rfc3261_16_3_4_ Receive a Request already sent by us
   *   Does not look at via sent-by but at jssip_id, which is inserted as
   *   a prefix in all initial requests generated by the ua
   *  - _rfc3261_18_3_request_ Body Content-Length
   *  - _rfc3261_8_2_2_2_ Merged Requests
   *
   * Responses:
   *  - _rfc3261_8_1_3_3_ Multiple Via headers
   *  - _rfc3261_18_3_response_ Body Content-Length
   *
   * All:
   *  - Minimum headers in a SIP message
   */
  // Sanity Check functions for requests.
  
  
  function rfc3261_8_2_2_1() {
    if (message.s('to').uri.scheme !== 'sip') {
      reply(416);
      return false;
    }
  }
  
  function rfc3261_16_3_4() {
    if (!message.to_tag) {
      if (message.call_id.substr(0, 5) === ua.configuration.jssip_id) {
        reply(482);
        return false;
      }
    }
  }
  
  function rfc3261_18_3_request() {
    var len = Utils.str_utf8_length(message.body);
    var contentLength = message.getHeader('content-length');
  
    if (len < contentLength) {
      reply(400);
      return false;
    }
  }
  
  function rfc3261_8_2_2_2() {
    var fromTag = message.from_tag;
    var call_id = message.call_id;
    var cseq = message.cseq;
    var tr; // Accept any in-dialog request.
  
    if (message.to_tag) {
      return;
    } // INVITE request.
  
  
    if (message.method === JsSIP_C.INVITE) {
      // If the branch matches the key of any IST then assume it is a retransmission
      // and ignore the INVITE.
      // TODO: we should reply the last response.
      if (ua._transactions.ist[message.via_branch]) {
        return false;
      } // Otherwise check whether it is a merged request.
      else {
          for (var transaction in ua._transactions.ist) {
            if (Object.prototype.hasOwnProperty.call(ua._transactions.ist, transaction)) {
              tr = ua._transactions.ist[transaction];
  
              if (tr.request.from_tag === fromTag && tr.request.call_id === call_id && tr.request.cseq === cseq) {
                reply(482);
                return false;
              }
            }
          }
        }
    } // Non INVITE request.
    // If the branch matches the key of any NIST then assume it is a retransmission
    // and ignore the request.
    // TODO: we should reply the last response.
    else if (ua._transactions.nist[message.via_branch]) {
        return false;
      } // Otherwise check whether it is a merged request.
      else {
          for (var _transaction in ua._transactions.nist) {
            if (Object.prototype.hasOwnProperty.call(ua._transactions.nist, _transaction)) {
              tr = ua._transactions.nist[_transaction];
  
              if (tr.request.from_tag === fromTag && tr.request.call_id === call_id && tr.request.cseq === cseq) {
                reply(482);
                return false;
              }
            }
          }
        }
  } // Sanity Check functions for responses.
  
  
  function rfc3261_8_1_3_3() {
    if (message.getHeaders('via').length > 1) {
      debug('more than one Via header field present in the response, dropping the response');
      return false;
    }
  }
  
  function rfc3261_18_3_response() {
    var len = Utils.str_utf8_length(message.body),
        contentLength = message.getHeader('content-length');
  
    if (len < contentLength) {
      debug('message body length is lower than the value in Content-Length header field, dropping the response');
      return false;
    }
  } // Sanity Check functions for requests and responses.
  
  
  function minimumHeaders() {
    var mandatoryHeaders = ['from', 'to', 'call_id', 'cseq', 'via'];
  
    for (var _i = 0, _mandatoryHeaders = mandatoryHeaders; _i < _mandatoryHeaders.length; _i++) {
      var header = _mandatoryHeaders[_i];
  
      if (!message.hasHeader(header)) {
        debug("missing mandatory header field : ".concat(header, ", dropping the response"));
        return false;
      }
    }
  } // Reply.
  
  
  function reply(status_code) {
    var vias = message.getHeaders('via');
    var to;
    var response = "SIP/2.0 ".concat(status_code, " ").concat(JsSIP_C.REASON_PHRASE[status_code], "\r\n");
  
    var _iterator4 = _createForOfIteratorHelper(vias),
        _step4;
  
    try {
      for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
        var via = _step4.value;
        response += "Via: ".concat(via, "\r\n");
      }
    } catch (err) {
      _iterator4.e(err);
    } finally {
      _iterator4.f();
    }
  
    to = message.getHeader('To');
  
    if (!message.to_tag) {
      to += ";tag=".concat(Utils.newTag());
    }
  
    response += "To: ".concat(to, "\r\n");
    response += "From: ".concat(message.getHeader('From'), "\r\n");
    response += "Call-ID: ".concat(message.call_id, "\r\n");
    response += "CSeq: ".concat(message.cseq, " ").concat(message.method, "\r\n");
    response += '\r\n';
    transport.send(response);
  }
  },{"./Constants":2,"./SIPMessage":19,"./Utils":26,"debug":30}],29:[function(require,module,exports){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  var objectCreate = Object.create || objectCreatePolyfill
  var objectKeys = Object.keys || objectKeysPolyfill
  var bind = Function.prototype.bind || functionBindPolyfill
  
  function EventEmitter() {
    if (!this._events || !Object.prototype.hasOwnProperty.call(this, '_events')) {
      this._events = objectCreate(null);
      this._eventsCount = 0;
    }
  
    this._maxListeners = this._maxListeners || undefined;
  }
  module.exports = EventEmitter;
  
  // Backwards-compat with node 0.10.x
  EventEmitter.EventEmitter = EventEmitter;
  
  EventEmitter.prototype._events = undefined;
  EventEmitter.prototype._maxListeners = undefined;
  
  // By default EventEmitters will print a warning if more than 10 listeners are
  // added to it. This is a useful default which helps finding memory leaks.
  var defaultMaxListeners = 10;
  
  var hasDefineProperty;
  try {
    var o = {};
    if (Object.defineProperty) Object.defineProperty(o, 'x', { value: 0 });
    hasDefineProperty = o.x === 0;
  } catch (err) { hasDefineProperty = false }
  if (hasDefineProperty) {
    Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
      enumerable: true,
      get: function() {
        return defaultMaxListeners;
      },
      set: function(arg) {
        // check whether the input is a positive number (whose value is zero or
        // greater and not a NaN).
        if (typeof arg !== 'number' || arg < 0 || arg !== arg)
          throw new TypeError('"defaultMaxListeners" must be a positive number');
        defaultMaxListeners = arg;
      }
    });
  } else {
    EventEmitter.defaultMaxListeners = defaultMaxListeners;
  }
  
  // Obviously not all Emitters should be limited to 10. This function allows
  // that to be increased. Set to zero for unlimited.
  EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
    if (typeof n !== 'number' || n < 0 || isNaN(n))
      throw new TypeError('"n" argument must be a positive number');
    this._maxListeners = n;
    return this;
  };
  
  function $getMaxListeners(that) {
    if (that._maxListeners === undefined)
      return EventEmitter.defaultMaxListeners;
    return that._maxListeners;
  }
  
  EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
    return $getMaxListeners(this);
  };
  
  // These standalone emit* functions are used to optimize calling of event
  // handlers for fast cases because emit() itself often has a variable number of
  // arguments and can be deoptimized because of that. These functions always have
  // the same number of arguments and thus do not get deoptimized, so the code
  // inside them can execute faster.
  function emitNone(handler, isFn, self) {
    if (isFn)
      handler.call(self);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].call(self);
    }
  }
  function emitOne(handler, isFn, self, arg1) {
    if (isFn)
      handler.call(self, arg1);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].call(self, arg1);
    }
  }
  function emitTwo(handler, isFn, self, arg1, arg2) {
    if (isFn)
      handler.call(self, arg1, arg2);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].call(self, arg1, arg2);
    }
  }
  function emitThree(handler, isFn, self, arg1, arg2, arg3) {
    if (isFn)
      handler.call(self, arg1, arg2, arg3);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].call(self, arg1, arg2, arg3);
    }
  }
  
  function emitMany(handler, isFn, self, args) {
    if (isFn)
      handler.apply(self, args);
    else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i)
        listeners[i].apply(self, args);
    }
  }
  
  EventEmitter.prototype.emit = function emit(type) {
    var er, handler, len, args, i, events;
    var doError = (type === 'error');
  
    events = this._events;
    if (events)
      doError = (doError && events.error == null);
    else if (!doError)
      return false;
  
    // If there is no 'error' event listener then throw.
    if (doError) {
      if (arguments.length > 1)
        er = arguments[1];
      if (er instanceof Error) {
        throw er; // Unhandled 'error' event
      } else {
        // At least give some kind of context to the user
        var err = new Error('Unhandled "error" event. (' + er + ')');
        err.context = er;
        throw err;
      }
      return false;
    }
  
    handler = events[type];
  
    if (!handler)
      return false;
  
    var isFn = typeof handler === 'function';
    len = arguments.length;
    switch (len) {
        // fast cases
      case 1:
        emitNone(handler, isFn, this);
        break;
      case 2:
        emitOne(handler, isFn, this, arguments[1]);
        break;
      case 3:
        emitTwo(handler, isFn, this, arguments[1], arguments[2]);
        break;
      case 4:
        emitThree(handler, isFn, this, arguments[1], arguments[2], arguments[3]);
        break;
        // slower
      default:
        args = new Array(len - 1);
        for (i = 1; i < len; i++)
          args[i - 1] = arguments[i];
        emitMany(handler, isFn, this, args);
    }
  
    return true;
  };
  
  function _addListener(target, type, listener, prepend) {
    var m;
    var events;
    var existing;
  
    if (typeof listener !== 'function')
      throw new TypeError('"listener" argument must be a function');
  
    events = target._events;
    if (!events) {
      events = target._events = objectCreate(null);
      target._eventsCount = 0;
    } else {
      // To avoid recursion in the case that type === "newListener"! Before
      // adding it to the listeners, first emit "newListener".
      if (events.newListener) {
        target.emit('newListener', type,
            listener.listener ? listener.listener : listener);
  
        // Re-assign `events` because a newListener handler could have caused the
        // this._events to be assigned to a new object
        events = target._events;
      }
      existing = events[type];
    }
  
    if (!existing) {
      // Optimize the case of one listener. Don't need the extra array object.
      existing = events[type] = listener;
      ++target._eventsCount;
    } else {
      if (typeof existing === 'function') {
        // Adding the second element, need to change to array.
        existing = events[type] =
            prepend ? [listener, existing] : [existing, listener];
      } else {
        // If we've already got an array, just append.
        if (prepend) {
          existing.unshift(listener);
        } else {
          existing.push(listener);
        }
      }
  
      // Check for listener leak
      if (!existing.warned) {
        m = $getMaxListeners(target);
        if (m && m > 0 && existing.length > m) {
          existing.warned = true;
          var w = new Error('Possible EventEmitter memory leak detected. ' +
              existing.length + ' "' + String(type) + '" listeners ' +
              'added. Use emitter.setMaxListeners() to ' +
              'increase limit.');
          w.name = 'MaxListenersExceededWarning';
          w.emitter = target;
          w.type = type;
          w.count = existing.length;
          if (typeof console === 'object' && console.warn) {
            console.warn('%s: %s', w.name, w.message);
          }
        }
      }
    }
  
    return target;
  }
  
  EventEmitter.prototype.addListener = function addListener(type, listener) {
    return _addListener(this, type, listener, false);
  };
  
  EventEmitter.prototype.on = EventEmitter.prototype.addListener;
  
  EventEmitter.prototype.prependListener =
      function prependListener(type, listener) {
        return _addListener(this, type, listener, true);
      };
  
  function onceWrapper() {
    if (!this.fired) {
      this.target.removeListener(this.type, this.wrapFn);
      this.fired = true;
      switch (arguments.length) {
        case 0:
          return this.listener.call(this.target);
        case 1:
          return this.listener.call(this.target, arguments[0]);
        case 2:
          return this.listener.call(this.target, arguments[0], arguments[1]);
        case 3:
          return this.listener.call(this.target, arguments[0], arguments[1],
              arguments[2]);
        default:
          var args = new Array(arguments.length);
          for (var i = 0; i < args.length; ++i)
            args[i] = arguments[i];
          this.listener.apply(this.target, args);
      }
    }
  }
  
  function _onceWrap(target, type, listener) {
    var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
    var wrapped = bind.call(onceWrapper, state);
    wrapped.listener = listener;
    state.wrapFn = wrapped;
    return wrapped;
  }
  
  EventEmitter.prototype.once = function once(type, listener) {
    if (typeof listener !== 'function')
      throw new TypeError('"listener" argument must be a function');
    this.on(type, _onceWrap(this, type, listener));
    return this;
  };
  
  EventEmitter.prototype.prependOnceListener =
      function prependOnceListener(type, listener) {
        if (typeof listener !== 'function')
          throw new TypeError('"listener" argument must be a function');
        this.prependListener(type, _onceWrap(this, type, listener));
        return this;
      };
  
  // Emits a 'removeListener' event if and only if the listener was removed.
  EventEmitter.prototype.removeListener =
      function removeListener(type, listener) {
        var list, events, position, i, originalListener;
  
        if (typeof listener !== 'function')
          throw new TypeError('"listener" argument must be a function');
  
        events = this._events;
        if (!events)
          return this;
  
        list = events[type];
        if (!list)
          return this;
  
        if (list === listener || list.listener === listener) {
          if (--this._eventsCount === 0)
            this._events = objectCreate(null);
          else {
            delete events[type];
            if (events.removeListener)
              this.emit('removeListener', type, list.listener || listener);
          }
        } else if (typeof list !== 'function') {
          position = -1;
  
          for (i = list.length - 1; i >= 0; i--) {
            if (list[i] === listener || list[i].listener === listener) {
              originalListener = list[i].listener;
              position = i;
              break;
            }
          }
  
          if (position < 0)
            return this;
  
          if (position === 0)
            list.shift();
          else
            spliceOne(list, position);
  
          if (list.length === 1)
            events[type] = list[0];
  
          if (events.removeListener)
            this.emit('removeListener', type, originalListener || listener);
        }
  
        return this;
      };
  
  EventEmitter.prototype.removeAllListeners =
      function removeAllListeners(type) {
        var listeners, events, i;
  
        events = this._events;
        if (!events)
          return this;
  
        // not listening for removeListener, no need to emit
        if (!events.removeListener) {
          if (arguments.length === 0) {
            this._events = objectCreate(null);
            this._eventsCount = 0;
          } else if (events[type]) {
            if (--this._eventsCount === 0)
              this._events = objectCreate(null);
            else
              delete events[type];
          }
          return this;
        }
  
        // emit removeListener for all listeners on all events
        if (arguments.length === 0) {
          var keys = objectKeys(events);
          var key;
          for (i = 0; i < keys.length; ++i) {
            key = keys[i];
            if (key === 'removeListener') continue;
            this.removeAllListeners(key);
          }
          this.removeAllListeners('removeListener');
          this._events = objectCreate(null);
          this._eventsCount = 0;
          return this;
        }
  
        listeners = events[type];
  
        if (typeof listeners === 'function') {
          this.removeListener(type, listeners);
        } else if (listeners) {
          // LIFO order
          for (i = listeners.length - 1; i >= 0; i--) {
            this.removeListener(type, listeners[i]);
          }
        }
  
        return this;
      };
  
  function _listeners(target, type, unwrap) {
    var events = target._events;
  
    if (!events)
      return [];
  
    var evlistener = events[type];
    if (!evlistener)
      return [];
  
    if (typeof evlistener === 'function')
      return unwrap ? [evlistener.listener || evlistener] : [evlistener];
  
    return unwrap ? unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
  }
  
  EventEmitter.prototype.listeners = function listeners(type) {
    return _listeners(this, type, true);
  };
  
  EventEmitter.prototype.rawListeners = function rawListeners(type) {
    return _listeners(this, type, false);
  };
  
  EventEmitter.listenerCount = function(emitter, type) {
    if (typeof emitter.listenerCount === 'function') {
      return emitter.listenerCount(type);
    } else {
      return listenerCount.call(emitter, type);
    }
  };
  
  EventEmitter.prototype.listenerCount = listenerCount;
  function listenerCount(type) {
    var events = this._events;
  
    if (events) {
      var evlistener = events[type];
  
      if (typeof evlistener === 'function') {
        return 1;
      } else if (evlistener) {
        return evlistener.length;
      }
    }
  
    return 0;
  }
  
  EventEmitter.prototype.eventNames = function eventNames() {
    return this._eventsCount > 0 ? Reflect.ownKeys(this._events) : [];
  };
  
  // About 1.5x faster than the two-arg version of Array#splice().
  function spliceOne(list, index) {
    for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1)
      list[i] = list[k];
    list.pop();
  }
  
  function arrayClone(arr, n) {
    var copy = new Array(n);
    for (var i = 0; i < n; ++i)
      copy[i] = arr[i];
    return copy;
  }
  
  function unwrapListeners(arr) {
    var ret = new Array(arr.length);
    for (var i = 0; i < ret.length; ++i) {
      ret[i] = arr[i].listener || arr[i];
    }
    return ret;
  }
  
  function objectCreatePolyfill(proto) {
    var F = function() {};
    F.prototype = proto;
    return new F;
  }
  function objectKeysPolyfill(obj) {
    var keys = [];
    for (var k in obj) if (Object.prototype.hasOwnProperty.call(obj, k)) {
      keys.push(k);
    }
    return k;
  }
  function functionBindPolyfill(context) {
    var fn = this;
    return function () {
      return fn.apply(context, arguments);
    };
  }
  
  },{}],30:[function(require,module,exports){
  (function (process){
  /* eslint-env browser */
  
  /**
   * This is the web browser implementation of `debug()`.
   */
  
  exports.log = log;
  exports.formatArgs = formatArgs;
  exports.save = save;
  exports.load = load;
  exports.useColors = useColors;
  exports.storage = localstorage();
  
  /**
   * Colors.
   */
  
  exports.colors = [
  	'#0000CC',
  	'#0000FF',
  	'#0033CC',
  	'#0033FF',
  	'#0066CC',
  	'#0066FF',
  	'#0099CC',
  	'#0099FF',
  	'#00CC00',
  	'#00CC33',
  	'#00CC66',
  	'#00CC99',
  	'#00CCCC',
  	'#00CCFF',
  	'#3300CC',
  	'#3300FF',
  	'#3333CC',
  	'#3333FF',
  	'#3366CC',
  	'#3366FF',
  	'#3399CC',
  	'#3399FF',
  	'#33CC00',
  	'#33CC33',
  	'#33CC66',
  	'#33CC99',
  	'#33CCCC',
  	'#33CCFF',
  	'#6600CC',
  	'#6600FF',
  	'#6633CC',
  	'#6633FF',
  	'#66CC00',
  	'#66CC33',
  	'#9900CC',
  	'#9900FF',
  	'#9933CC',
  	'#9933FF',
  	'#99CC00',
  	'#99CC33',
  	'#CC0000',
  	'#CC0033',
  	'#CC0066',
  	'#CC0099',
  	'#CC00CC',
  	'#CC00FF',
  	'#CC3300',
  	'#CC3333',
  	'#CC3366',
  	'#CC3399',
  	'#CC33CC',
  	'#CC33FF',
  	'#CC6600',
  	'#CC6633',
  	'#CC9900',
  	'#CC9933',
  	'#CCCC00',
  	'#CCCC33',
  	'#FF0000',
  	'#FF0033',
  	'#FF0066',
  	'#FF0099',
  	'#FF00CC',
  	'#FF00FF',
  	'#FF3300',
  	'#FF3333',
  	'#FF3366',
  	'#FF3399',
  	'#FF33CC',
  	'#FF33FF',
  	'#FF6600',
  	'#FF6633',
  	'#FF9900',
  	'#FF9933',
  	'#FFCC00',
  	'#FFCC33'
  ];
  
  /**
   * Currently only WebKit-based Web Inspectors, Firefox >= v31,
   * and the Firebug extension (any Firefox version) are known
   * to support "%c" CSS customizations.
   *
   * TODO: add a `localStorage` variable to explicitly enable/disable colors
   */
  
  // eslint-disable-next-line complexity
  function useColors() {
  	// NB: In an Electron preload script, document will be defined but not fully
  	// initialized. Since we know we're in Chrome, we'll just detect this case
  	// explicitly
  	if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {
  		return true;
  	}
  
  	// Internet Explorer and Edge do not support colors.
  	if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
  		return false;
  	}
  
  	// Is webkit? http://stackoverflow.com/a/16459606/376773
  	// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
  	return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
  		// Is firebug? http://stackoverflow.com/a/398120/376773
  		(typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
  		// Is firefox >= v31?
  		// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
  		(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
  		// Double check webkit in userAgent just in case we are in a worker
  		(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
  }
  
  /**
   * Colorize log arguments if enabled.
   *
   * @api public
   */
  
  function formatArgs(args) {
  	args[0] = (this.useColors ? '%c' : '') +
  		this.namespace +
  		(this.useColors ? ' %c' : ' ') +
  		args[0] +
  		(this.useColors ? '%c ' : ' ') +
  		'+' + module.exports.humanize(this.diff);
  
  	if (!this.useColors) {
  		return;
  	}
  
  	const c = 'color: ' + this.color;
  	args.splice(1, 0, c, 'color: inherit');
  
  	// The final "%c" is somewhat tricky, because there could be other
  	// arguments passed either before or after the %c, so we need to
  	// figure out the correct index to insert the CSS into
  	let index = 0;
  	let lastC = 0;
  	args[0].replace(/%[a-zA-Z%]/g, match => {
  		if (match === '%%') {
  			return;
  		}
  		index++;
  		if (match === '%c') {
  			// We only are interested in the *last* %c
  			// (the user may have provided their own)
  			lastC = index;
  		}
  	});
  
  	args.splice(lastC, 0, c);
  }
  
  /**
   * Invokes `console.log()` when available.
   * No-op when `console.log` is not a "function".
   *
   * @api public
   */
  function log(...args) {
  	// This hackery is required for IE8/9, where
  	// the `console.log` function doesn't have 'apply'
  	return typeof console === 'object' &&
  		console.log &&
  		console.log(...args);
  }
  
  /**
   * Save `namespaces`.
   *
   * @param {String} namespaces
   * @api private
   */
  function save(namespaces) {
  	try {
  		if (namespaces) {
  			exports.storage.setItem('debug', namespaces);
  		} else {
  			exports.storage.removeItem('debug');
  		}
  	} catch (error) {
  		// Swallow
  		// XXX (@Qix-) should we be logging these?
  	}
  }
  
  /**
   * Load `namespaces`.
   *
   * @return {String} returns the previously persisted debug modes
   * @api private
   */
  function load() {
  	let r;
  	try {
  		r = exports.storage.getItem('debug');
  	} catch (error) {
  		// Swallow
  		// XXX (@Qix-) should we be logging these?
  	}
  
  	// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
  	if (!r && typeof process !== 'undefined' && 'env' in process) {
  		r = process.env.DEBUG;
  	}
  
  	return r;
  }
  
  /**
   * Localstorage attempts to return the localstorage.
   *
   * This is necessary because safari throws
   * when a user disables cookies/localstorage
   * and you attempt to access it.
   *
   * @return {LocalStorage}
   * @api private
   */
  
  function localstorage() {
  	try {
  		// TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context
  		// The Browser also has localStorage in the global context.
  		return localStorage;
  	} catch (error) {
  		// Swallow
  		// XXX (@Qix-) should we be logging these?
  	}
  }
  
  module.exports = require('./common')(exports);
  
  const {formatters} = module.exports;
  
  /**
   * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
   */
  
  formatters.j = function (v) {
  	try {
  		return JSON.stringify(v);
  	} catch (error) {
  		return '[UnexpectedJSONParseError]: ' + error.message;
  	}
  };
  
  }).call(this,require('_process'))
  },{"./common":31,"_process":33}],31:[function(require,module,exports){
  
  /**
   * This is the common logic for both the Node.js and web browser
   * implementations of `debug()`.
   */
  
  function setup(env) {
  	createDebug.debug = createDebug;
  	createDebug.default = createDebug;
  	createDebug.coerce = coerce;
  	createDebug.disable = disable;
  	createDebug.enable = enable;
  	createDebug.enabled = enabled;
  	createDebug.humanize = require('ms');
  
  	Object.keys(env).forEach(key => {
  		createDebug[key] = env[key];
  	});
  
  	/**
  	* Active `debug` instances.
  	*/
  	createDebug.instances = [];
  
  	/**
  	* The currently active debug mode names, and names to skip.
  	*/
  
  	createDebug.names = [];
  	createDebug.skips = [];
  
  	/**
  	* Map of special "%n" handling functions, for the debug "format" argument.
  	*
  	* Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
  	*/
  	createDebug.formatters = {};
  
  	/**
  	* Selects a color for a debug namespace
  	* @param {String} namespace The namespace string for the for the debug instance to be colored
  	* @return {Number|String} An ANSI color code for the given namespace
  	* @api private
  	*/
  	function selectColor(namespace) {
  		let hash = 0;
  
  		for (let i = 0; i < namespace.length; i++) {
  			hash = ((hash << 5) - hash) + namespace.charCodeAt(i);
  			hash |= 0; // Convert to 32bit integer
  		}
  
  		return createDebug.colors[Math.abs(hash) % createDebug.colors.length];
  	}
  	createDebug.selectColor = selectColor;
  
  	/**
  	* Create a debugger with the given `namespace`.
  	*
  	* @param {String} namespace
  	* @return {Function}
  	* @api public
  	*/
  	function createDebug(namespace) {
  		let prevTime;
  
  		function debug(...args) {
  			// Disabled?
  			if (!debug.enabled) {
  				return;
  			}
  
  			const self = debug;
  
  			// Set `diff` timestamp
  			const curr = Number(new Date());
  			const ms = curr - (prevTime || curr);
  			self.diff = ms;
  			self.prev = prevTime;
  			self.curr = curr;
  			prevTime = curr;
  
  			args[0] = createDebug.coerce(args[0]);
  
  			if (typeof args[0] !== 'string') {
  				// Anything else let's inspect with %O
  				args.unshift('%O');
  			}
  
  			// Apply any `formatters` transformations
  			let index = 0;
  			args[0] = args[0].replace(/%([a-zA-Z%])/g, (match, format) => {
  				// If we encounter an escaped % then don't increase the array index
  				if (match === '%%') {
  					return match;
  				}
  				index++;
  				const formatter = createDebug.formatters[format];
  				if (typeof formatter === 'function') {
  					const val = args[index];
  					match = formatter.call(self, val);
  
  					// Now we need to remove `args[index]` since it's inlined in the `format`
  					args.splice(index, 1);
  					index--;
  				}
  				return match;
  			});
  
  			// Apply env-specific formatting (colors, etc.)
  			createDebug.formatArgs.call(self, args);
  
  			const logFn = self.log || createDebug.log;
  			logFn.apply(self, args);
  		}
  
  		debug.namespace = namespace;
  		debug.enabled = createDebug.enabled(namespace);
  		debug.useColors = createDebug.useColors();
  		debug.color = selectColor(namespace);
  		debug.destroy = destroy;
  		debug.extend = extend;
  		// Debug.formatArgs = formatArgs;
  		// debug.rawLog = rawLog;
  
  		// env-specific initialization logic for debug instances
  		if (typeof createDebug.init === 'function') {
  			createDebug.init(debug);
  		}
  
  		createDebug.instances.push(debug);
  
  		return debug;
  	}
  
  	function destroy() {
  		const index = createDebug.instances.indexOf(this);
  		if (index !== -1) {
  			createDebug.instances.splice(index, 1);
  			return true;
  		}
  		return false;
  	}
  
  	function extend(namespace, delimiter) {
  		const newDebug = createDebug(this.namespace + (typeof delimiter === 'undefined' ? ':' : delimiter) + namespace);
  		newDebug.log = this.log;
  		return newDebug;
  	}
  
  	/**
  	* Enables a debug mode by namespaces. This can include modes
  	* separated by a colon and wildcards.
  	*
  	* @param {String} namespaces
  	* @api public
  	*/
  	function enable(namespaces) {
  		createDebug.save(namespaces);
  
  		createDebug.names = [];
  		createDebug.skips = [];
  
  		let i;
  		const split = (typeof namespaces === 'string' ? namespaces : '').split(/[\s,]+/);
  		const len = split.length;
  
  		for (i = 0; i < len; i++) {
  			if (!split[i]) {
  				// ignore empty strings
  				continue;
  			}
  
  			namespaces = split[i].replace(/\*/g, '.*?');
  
  			if (namespaces[0] === '-') {
  				createDebug.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
  			} else {
  				createDebug.names.push(new RegExp('^' + namespaces + '$'));
  			}
  		}
  
  		for (i = 0; i < createDebug.instances.length; i++) {
  			const instance = createDebug.instances[i];
  			instance.enabled = createDebug.enabled(instance.namespace);
  		}
  	}
  
  	/**
  	* Disable debug output.
  	*
  	* @return {String} namespaces
  	* @api public
  	*/
  	function disable() {
  		const namespaces = [
  			...createDebug.names.map(toNamespace),
  			...createDebug.skips.map(toNamespace).map(namespace => '-' + namespace)
  		].join(',');
  		createDebug.enable('');
  		return namespaces;
  	}
  
  	/**
  	* Returns true if the given mode name is enabled, false otherwise.
  	*
  	* @param {String} name
  	* @return {Boolean}
  	* @api public
  	*/
  	function enabled(name) {
  		if (name[name.length - 1] === '*') {
  			return true;
  		}
  
  		let i;
  		let len;
  
  		for (i = 0, len = createDebug.skips.length; i < len; i++) {
  			if (createDebug.skips[i].test(name)) {
  				return false;
  			}
  		}
  
  		for (i = 0, len = createDebug.names.length; i < len; i++) {
  			if (createDebug.names[i].test(name)) {
  				return true;
  			}
  		}
  
  		return false;
  	}
  
  	/**
  	* Convert regexp to namespace
  	*
  	* @param {RegExp} regxep
  	* @return {String} namespace
  	* @api private
  	*/
  	function toNamespace(regexp) {
  		return regexp.toString()
  			.substring(2, regexp.toString().length - 2)
  			.replace(/\.\*\?$/, '*');
  	}
  
  	/**
  	* Coerce `val`.
  	*
  	* @param {Mixed} val
  	* @return {Mixed}
  	* @api private
  	*/
  	function coerce(val) {
  		if (val instanceof Error) {
  			return val.stack || val.message;
  		}
  		return val;
  	}
  
  	createDebug.enable(createDebug.load());
  
  	return createDebug;
  }
  
  module.exports = setup;
  
  },{"ms":32}],32:[function(require,module,exports){
  /**
   * Helpers.
   */
  
  var s = 1000;
  var m = s * 60;
  var h = m * 60;
  var d = h * 24;
  var w = d * 7;
  var y = d * 365.25;
  
  /**
   * Parse or format the given `val`.
   *
   * Options:
   *
   *  - `long` verbose formatting [false]
   *
   * @param {String|Number} val
   * @param {Object} [options]
   * @throws {Error} throw an error if val is not a non-empty string or a number
   * @return {String|Number}
   * @api public
   */
  
  module.exports = function(val, options) {
    options = options || {};
    var type = typeof val;
    if (type === 'string' && val.length > 0) {
      return parse(val);
    } else if (type === 'number' && isFinite(val)) {
      return options.long ? fmtLong(val) : fmtShort(val);
    }
    throw new Error(
      'val is not a non-empty string or a valid number. val=' +
        JSON.stringify(val)
    );
  };
  
  /**
   * Parse the given `str` and return milliseconds.
   *
   * @param {String} str
   * @return {Number}
   * @api private
   */
  
  function parse(str) {
    str = String(str);
    if (str.length > 100) {
      return;
    }
    var match = /^(-?(?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(
      str
    );
    if (!match) {
      return;
    }
    var n = parseFloat(match[1]);
    var type = (match[2] || 'ms').toLowerCase();
    switch (type) {
      case 'years':
      case 'year':
      case 'yrs':
      case 'yr':
      case 'y':
        return n * y;
      case 'weeks':
      case 'week':
      case 'w':
        return n * w;
      case 'days':
      case 'day':
      case 'd':
        return n * d;
      case 'hours':
      case 'hour':
      case 'hrs':
      case 'hr':
      case 'h':
        return n * h;
      case 'minutes':
      case 'minute':
      case 'mins':
      case 'min':
      case 'm':
        return n * m;
      case 'seconds':
      case 'second':
      case 'secs':
      case 'sec':
      case 's':
        return n * s;
      case 'milliseconds':
      case 'millisecond':
      case 'msecs':
      case 'msec':
      case 'ms':
        return n;
      default:
        return undefined;
    }
  }
  
  /**
   * Short format for `ms`.
   *
   * @param {Number} ms
   * @return {String}
   * @api private
   */
  
  function fmtShort(ms) {
    var msAbs = Math.abs(ms);
    if (msAbs >= d) {
      return Math.round(ms / d) + 'd';
    }
    if (msAbs >= h) {
      return Math.round(ms / h) + 'h';
    }
    if (msAbs >= m) {
      return Math.round(ms / m) + 'm';
    }
    if (msAbs >= s) {
      return Math.round(ms / s) + 's';
    }
    return ms + 'ms';
  }
  
  /**
   * Long format for `ms`.
   *
   * @param {Number} ms
   * @return {String}
   * @api private
   */
  
  function fmtLong(ms) {
    var msAbs = Math.abs(ms);
    if (msAbs >= d) {
      return plural(ms, msAbs, d, 'day');
    }
    if (msAbs >= h) {
      return plural(ms, msAbs, h, 'hour');
    }
    if (msAbs >= m) {
      return plural(ms, msAbs, m, 'minute');
    }
    if (msAbs >= s) {
      return plural(ms, msAbs, s, 'second');
    }
    return ms + ' ms';
  }
  
  /**
   * Pluralization helper.
   */
  
  function plural(ms, msAbs, n, name) {
    var isPlural = msAbs >= n * 1.5;
    return Math.round(ms / n) + ' ' + name + (isPlural ? 's' : '');
  }
  
  },{}],33:[function(require,module,exports){
  // shim for using process in browser
  var process = module.exports = {};
  
  // cached from whatever global is present so that test runners that stub it
  // don't break things.  But we need to wrap it in a try catch in case it is
  // wrapped in strict mode code which doesn't define any globals.  It's inside a
  // function because try/catches deoptimize in certain engines.
  
  var cachedSetTimeout;
  var cachedClearTimeout;
  
  function defaultSetTimout() {
      throw new Error('setTimeout has not been defined');
  }
  function defaultClearTimeout () {
      throw new Error('clearTimeout has not been defined');
  }
  (function () {
      try {
          if (typeof setTimeout === 'function') {
              cachedSetTimeout = setTimeout;
          } else {
              cachedSetTimeout = defaultSetTimout;
          }
      } catch (e) {
          cachedSetTimeout = defaultSetTimout;
      }
      try {
          if (typeof clearTimeout === 'function') {
              cachedClearTimeout = clearTimeout;
          } else {
              cachedClearTimeout = defaultClearTimeout;
          }
      } catch (e) {
          cachedClearTimeout = defaultClearTimeout;
      }
  } ())
  function runTimeout(fun) {
      if (cachedSetTimeout === setTimeout) {
          //normal enviroments in sane situations
          return setTimeout(fun, 0);
      }
      // if setTimeout wasn't available but was latter defined
      if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
          cachedSetTimeout = setTimeout;
          return setTimeout(fun, 0);
      }
      try {
          // when when somebody has screwed with setTimeout but no I.E. maddness
          return cachedSetTimeout(fun, 0);
      } catch(e){
          try {
              // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
              return cachedSetTimeout.call(null, fun, 0);
          } catch(e){
              // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
              return cachedSetTimeout.call(this, fun, 0);
          }
      }
  
  
  }
  function runClearTimeout(marker) {
      if (cachedClearTimeout === clearTimeout) {
          //normal enviroments in sane situations
          return clearTimeout(marker);
      }
      // if clearTimeout wasn't available but was latter defined
      if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
          cachedClearTimeout = clearTimeout;
          return clearTimeout(marker);
      }
      try {
          // when when somebody has screwed with setTimeout but no I.E. maddness
          return cachedClearTimeout(marker);
      } catch (e){
          try {
              // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
              return cachedClearTimeout.call(null, marker);
          } catch (e){
              // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
              // Some versions of I.E. have different rules for clearTimeout vs setTimeout
              return cachedClearTimeout.call(this, marker);
          }
      }
  
  
  
  }
  var queue = [];
  var draining = false;
  var currentQueue;
  var queueIndex = -1;
  
  function cleanUpNextTick() {
      if (!draining || !currentQueue) {
          return;
      }
      draining = false;
      if (currentQueue.length) {
          queue = currentQueue.concat(queue);
      } else {
          queueIndex = -1;
      }
      if (queue.length) {
          drainQueue();
      }
  }
  
  function drainQueue() {
      if (draining) {
          return;
      }
      var timeout = runTimeout(cleanUpNextTick);
      draining = true;
  
      var len = queue.length;
      while(len) {
          currentQueue = queue;
          queue = [];
          while (++queueIndex < len) {
              if (currentQueue) {
                  currentQueue[queueIndex].run();
              }
          }
          queueIndex = -1;
          len = queue.length;
      }
      currentQueue = null;
      draining = false;
      runClearTimeout(timeout);
  }
  
  process.nextTick = function (fun) {
      var args = new Array(arguments.length - 1);
      if (arguments.length > 1) {
          for (var i = 1; i < arguments.length; i++) {
              args[i - 1] = arguments[i];
          }
      }
      queue.push(new Item(fun, args));
      if (queue.length === 1 && !draining) {
          runTimeout(drainQueue);
      }
  };
  
  // v8 likes predictible objects
  function Item(fun, array) {
      this.fun = fun;
      this.array = array;
  }
  Item.prototype.run = function () {
      this.fun.apply(null, this.array);
  };
  process.title = 'browser';
  process.browser = true;
  process.env = {};
  process.argv = [];
  process.version = ''; // empty string to avoid regexp issues
  process.versions = {};
  
  function noop() {}
  
  process.on = noop;
  process.addListener = noop;
  process.once = noop;
  process.off = noop;
  process.removeListener = noop;
  process.removeAllListeners = noop;
  process.emit = noop;
  process.prependListener = noop;
  process.prependOnceListener = noop;
  
  process.listeners = function (name) { return [] }
  
  process.binding = function (name) {
      throw new Error('process.binding is not supported');
  };
  
  process.cwd = function () { return '/' };
  process.chdir = function (dir) {
      throw new Error('process.chdir is not supported');
  };
  process.umask = function() { return 0; };
  
  },{}],34:[function(require,module,exports){
  var grammar = module.exports = {
    v: [{
      name: 'version',
      reg: /^(\d*)$/
    }],
    o: [{
      // o=- 20518 0 IN IP4 203.0.113.1
      // NB: sessionId will be a String in most cases because it is huge
      name: 'origin',
      reg: /^(\S*) (\d*) (\d*) (\S*) IP(\d) (\S*)/,
      names: ['username', 'sessionId', 'sessionVersion', 'netType', 'ipVer', 'address'],
      format: '%s %s %d %s IP%d %s'
    }],
    // default parsing of these only (though some of these feel outdated)
    s: [{ name: 'name' }],
    i: [{ name: 'description' }],
    u: [{ name: 'uri' }],
    e: [{ name: 'email' }],
    p: [{ name: 'phone' }],
    z: [{ name: 'timezones' }], // TODO: this one can actually be parsed properly...
    r: [{ name: 'repeats' }],   // TODO: this one can also be parsed properly
    // k: [{}], // outdated thing ignored
    t: [{
      // t=0 0
      name: 'timing',
      reg: /^(\d*) (\d*)/,
      names: ['start', 'stop'],
      format: '%d %d'
    }],
    c: [{
      // c=IN IP4 10.47.197.26
      name: 'connection',
      reg: /^IN IP(\d) (\S*)/,
      names: ['version', 'ip'],
      format: 'IN IP%d %s'
    }],
    b: [{
      // b=AS:4000
      push: 'bandwidth',
      reg: /^(TIAS|AS|CT|RR|RS):(\d*)/,
      names: ['type', 'limit'],
      format: '%s:%s'
    }],
    m: [{
      // m=video 51744 RTP/AVP 126 97 98 34 31
      // NB: special - pushes to session
      // TODO: rtp/fmtp should be filtered by the payloads found here?
      reg: /^(\w*) (\d*) ([\w/]*)(?: (.*))?/,
      names: ['type', 'port', 'protocol', 'payloads'],
      format: '%s %d %s %s'
    }],
    a: [
      {
        // a=rtpmap:110 opus/48000/2
        push: 'rtp',
        reg: /^rtpmap:(\d*) ([\w\-.]*)(?:\s*\/(\d*)(?:\s*\/(\S*))?)?/,
        names: ['payload', 'codec', 'rate', 'encoding'],
        format: function (o) {
          return (o.encoding)
            ? 'rtpmap:%d %s/%s/%s'
            : o.rate
              ? 'rtpmap:%d %s/%s'
              : 'rtpmap:%d %s';
        }
      },
      {
        // a=fmtp:108 profile-level-id=24;object=23;bitrate=64000
        // a=fmtp:111 minptime=10; useinbandfec=1
        push: 'fmtp',
        reg: /^fmtp:(\d*) ([\S| ]*)/,
        names: ['payload', 'config'],
        format: 'fmtp:%d %s'
      },
      {
        // a=control:streamid=0
        name: 'control',
        reg: /^control:(.*)/,
        format: 'control:%s'
      },
      {
        // a=rtcp:65179 IN IP4 193.84.77.194
        name: 'rtcp',
        reg: /^rtcp:(\d*)(?: (\S*) IP(\d) (\S*))?/,
        names: ['port', 'netType', 'ipVer', 'address'],
        format: function (o) {
          return (o.address != null)
            ? 'rtcp:%d %s IP%d %s'
            : 'rtcp:%d';
        }
      },
      {
        // a=rtcp-fb:98 trr-int 100
        push: 'rtcpFbTrrInt',
        reg: /^rtcp-fb:(\*|\d*) trr-int (\d*)/,
        names: ['payload', 'value'],
        format: 'rtcp-fb:%d trr-int %d'
      },
      {
        // a=rtcp-fb:98 nack rpsi
        push: 'rtcpFb',
        reg: /^rtcp-fb:(\*|\d*) ([\w-_]*)(?: ([\w-_]*))?/,
        names: ['payload', 'type', 'subtype'],
        format: function (o) {
          return (o.subtype != null)
            ? 'rtcp-fb:%s %s %s'
            : 'rtcp-fb:%s %s';
        }
      },
      {
        // a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
        // a=extmap:1/recvonly URI-gps-string
        // a=extmap:3 urn:ietf:params:rtp-hdrext:encrypt urn:ietf:params:rtp-hdrext:smpte-tc 25@600/24
        push: 'ext',
        reg: /^extmap:(\d+)(?:\/(\w+))?(?: (urn:ietf:params:rtp-hdrext:encrypt))? (\S*)(?: (\S*))?/,
        names: ['value', 'direction', 'encrypt-uri', 'uri', 'config'],
        format: function (o) {
          return (
            'extmap:%d' +
            (o.direction ? '/%s' : '%v') +
            (o['encrypt-uri'] ? ' %s' : '%v') +
            ' %s' +
            (o.config ? ' %s' : '')
          );
        }
      },
      {
        // a=extmap-allow-mixed
        name: 'extmapAllowMixed',
        reg: /^(extmap-allow-mixed)/
      },
      {
        // a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:PS1uQCVeeCFCanVmcjkpPywjNWhcYD0mXXtxaVBR|2^20|1:32
        push: 'crypto',
        reg: /^crypto:(\d*) ([\w_]*) (\S*)(?: (\S*))?/,
        names: ['id', 'suite', 'config', 'sessionConfig'],
        format: function (o) {
          return (o.sessionConfig != null)
            ? 'crypto:%d %s %s %s'
            : 'crypto:%d %s %s';
        }
      },
      {
        // a=setup:actpass
        name: 'setup',
        reg: /^setup:(\w*)/,
        format: 'setup:%s'
      },
      {
        // a=connection:new
        name: 'connectionType',
        reg: /^connection:(new|existing)/,
        format: 'connection:%s'
      },
      {
        // a=mid:1
        name: 'mid',
        reg: /^mid:([^\s]*)/,
        format: 'mid:%s'
      },
      {
        // a=msid:0c8b064d-d807-43b4-b434-f92a889d8587 98178685-d409-46e0-8e16-7ef0db0db64a
        name: 'msid',
        reg: /^msid:(.*)/,
        format: 'msid:%s'
      },
      {
        // a=ptime:20
        name: 'ptime',
        reg: /^ptime:(\d*(?:\.\d*)*)/,
        format: 'ptime:%d'
      },
      {
        // a=maxptime:60
        name: 'maxptime',
        reg: /^maxptime:(\d*(?:\.\d*)*)/,
        format: 'maxptime:%d'
      },
      {
        // a=sendrecv
        name: 'direction',
        reg: /^(sendrecv|recvonly|sendonly|inactive)/
      },
      {
        // a=ice-lite
        name: 'icelite',
        reg: /^(ice-lite)/
      },
      {
        // a=ice-ufrag:F7gI
        name: 'iceUfrag',
        reg: /^ice-ufrag:(\S*)/,
        format: 'ice-ufrag:%s'
      },
      {
        // a=ice-pwd:x9cml/YzichV2+XlhiMu8g
        name: 'icePwd',
        reg: /^ice-pwd:(\S*)/,
        format: 'ice-pwd:%s'
      },
      {
        // a=fingerprint:SHA-1 00:11:22:33:44:55:66:77:88:99:AA:BB:CC:DD:EE:FF:00:11:22:33
        name: 'fingerprint',
        reg: /^fingerprint:(\S*) (\S*)/,
        names: ['type', 'hash'],
        format: 'fingerprint:%s %s'
      },
      {
        // a=candidate:0 1 UDP 2113667327 203.0.113.1 54400 typ host
        // a=candidate:1162875081 1 udp 2113937151 192.168.34.75 60017 typ host generation 0 network-id 3 network-cost 10
        // a=candidate:3289912957 2 udp 1845501695 193.84.77.194 60017 typ srflx raddr 192.168.34.75 rport 60017 generation 0 network-id 3 network-cost 10
        // a=candidate:229815620 1 tcp 1518280447 192.168.150.19 60017 typ host tcptype active generation 0 network-id 3 network-cost 10
        // a=candidate:3289912957 2 tcp 1845501695 193.84.77.194 60017 typ srflx raddr 192.168.34.75 rport 60017 tcptype passive generation 0 network-id 3 network-cost 10
        push:'candidates',
        reg: /^candidate:(\S*) (\d*) (\S*) (\d*) (\S*) (\d*) typ (\S*)(?: raddr (\S*) rport (\d*))?(?: tcptype (\S*))?(?: generation (\d*))?(?: network-id (\d*))?(?: network-cost (\d*))?/,
        names: ['foundation', 'component', 'transport', 'priority', 'ip', 'port', 'type', 'raddr', 'rport', 'tcptype', 'generation', 'network-id', 'network-cost'],
        format: function (o) {
          var str = 'candidate:%s %d %s %d %s %d typ %s';
  
          str += (o.raddr != null) ? ' raddr %s rport %d' : '%v%v';
  
          // NB: candidate has three optional chunks, so %void middles one if it's missing
          str += (o.tcptype != null) ? ' tcptype %s' : '%v';
  
          if (o.generation != null) {
            str += ' generation %d';
          }
  
          str += (o['network-id'] != null) ? ' network-id %d' : '%v';
          str += (o['network-cost'] != null) ? ' network-cost %d' : '%v';
          return str;
        }
      },
      {
        // a=end-of-candidates (keep after the candidates line for readability)
        name: 'endOfCandidates',
        reg: /^(end-of-candidates)/
      },
      {
        // a=remote-candidates:1 203.0.113.1 54400 2 203.0.113.1 54401 ...
        name: 'remoteCandidates',
        reg: /^remote-candidates:(.*)/,
        format: 'remote-candidates:%s'
      },
      {
        // a=ice-options:google-ice
        name: 'iceOptions',
        reg: /^ice-options:(\S*)/,
        format: 'ice-options:%s'
      },
      {
        // a=ssrc:2566107569 cname:t9YU8M1UxTF8Y1A1
        push: 'ssrcs',
        reg: /^ssrc:(\d*) ([\w_-]*)(?::(.*))?/,
        names: ['id', 'attribute', 'value'],
        format: function (o) {
          var str = 'ssrc:%d';
          if (o.attribute != null) {
            str += ' %s';
            if (o.value != null) {
              str += ':%s';
            }
          }
          return str;
        }
      },
      {
        // a=ssrc-group:FEC 1 2
        // a=ssrc-group:FEC-FR 3004364195 1080772241
        push: 'ssrcGroups',
        // token-char = %x21 / %x23-27 / %x2A-2B / %x2D-2E / %x30-39 / %x41-5A / %x5E-7E
        reg: /^ssrc-group:([\x21\x23\x24\x25\x26\x27\x2A\x2B\x2D\x2E\w]*) (.*)/,
        names: ['semantics', 'ssrcs'],
        format: 'ssrc-group:%s %s'
      },
      {
        // a=msid-semantic: WMS Jvlam5X3SX1OP6pn20zWogvaKJz5Hjf9OnlV
        name: 'msidSemantic',
        reg: /^msid-semantic:\s?(\w*) (\S*)/,
        names: ['semantic', 'token'],
        format: 'msid-semantic: %s %s' // space after ':' is not accidental
      },
      {
        // a=group:BUNDLE audio video
        push: 'groups',
        reg: /^group:(\w*) (.*)/,
        names: ['type', 'mids'],
        format: 'group:%s %s'
      },
      {
        // a=rtcp-mux
        name: 'rtcpMux',
        reg: /^(rtcp-mux)/
      },
      {
        // a=rtcp-rsize
        name: 'rtcpRsize',
        reg: /^(rtcp-rsize)/
      },
      {
        // a=sctpmap:5000 webrtc-datachannel 1024
        name: 'sctpmap',
        reg: /^sctpmap:([\w_/]*) (\S*)(?: (\S*))?/,
        names: ['sctpmapNumber', 'app', 'maxMessageSize'],
        format: function (o) {
          return (o.maxMessageSize != null)
            ? 'sctpmap:%s %s %s'
            : 'sctpmap:%s %s';
        }
      },
      {
        // a=x-google-flag:conference
        name: 'xGoogleFlag',
        reg: /^x-google-flag:([^\s]*)/,
        format: 'x-google-flag:%s'
      },
      {
        // a=rid:1 send max-width=1280;max-height=720;max-fps=30;depend=0
        push: 'rids',
        reg: /^rid:([\d\w]+) (\w+)(?: ([\S| ]*))?/,
        names: ['id', 'direction', 'params'],
        format: function (o) {
          return (o.params) ? 'rid:%s %s %s' : 'rid:%s %s';
        }
      },
      {
        // a=imageattr:97 send [x=800,y=640,sar=1.1,q=0.6] [x=480,y=320] recv [x=330,y=250]
        // a=imageattr:* send [x=800,y=640] recv *
        // a=imageattr:100 recv [x=320,y=240]
        push: 'imageattrs',
        reg: new RegExp(
          // a=imageattr:97
          '^imageattr:(\\d+|\\*)' +
          // send [x=800,y=640,sar=1.1,q=0.6] [x=480,y=320]
          '[\\s\\t]+(send|recv)[\\s\\t]+(\\*|\\[\\S+\\](?:[\\s\\t]+\\[\\S+\\])*)' +
          // recv [x=330,y=250]
          '(?:[\\s\\t]+(recv|send)[\\s\\t]+(\\*|\\[\\S+\\](?:[\\s\\t]+\\[\\S+\\])*))?'
        ),
        names: ['pt', 'dir1', 'attrs1', 'dir2', 'attrs2'],
        format: function (o) {
          return 'imageattr:%s %s %s' + (o.dir2 ? ' %s %s' : '');
        }
      },
      {
        // a=simulcast:send 1,2,3;~4,~5 recv 6;~7,~8
        // a=simulcast:recv 1;4,5 send 6;7
        name: 'simulcast',
        reg: new RegExp(
          // a=simulcast:
          '^simulcast:' +
          // send 1,2,3;~4,~5
          '(send|recv) ([a-zA-Z0-9\\-_~;,]+)' +
          // space + recv 6;~7,~8
          '(?:\\s?(send|recv) ([a-zA-Z0-9\\-_~;,]+))?' +
          // end
          '$'
        ),
        names: ['dir1', 'list1', 'dir2', 'list2'],
        format: function (o) {
          return 'simulcast:%s %s' + (o.dir2 ? ' %s %s' : '');
        }
      },
      {
        // old simulcast draft 03 (implemented by Firefox)
        //   https://tools.ietf.org/html/draft-ietf-mmusic-sdp-simulcast-03
        // a=simulcast: recv pt=97;98 send pt=97
        // a=simulcast: send rid=5;6;7 paused=6,7
        name: 'simulcast_03',
        reg: /^simulcast:[\s\t]+([\S+\s\t]+)$/,
        names: ['value'],
        format: 'simulcast: %s'
      },
      {
        // a=framerate:25
        // a=framerate:29.97
        name: 'framerate',
        reg: /^framerate:(\d+(?:$|\.\d+))/,
        format: 'framerate:%s'
      },
      {
        // RFC4570
        // a=source-filter: incl IN IP4 239.5.2.31 10.1.15.5
        name: 'sourceFilter',
        reg: /^source-filter: *(excl|incl) (\S*) (IP4|IP6|\*) (\S*) (.*)/,
        names: ['filterMode', 'netType', 'addressTypes', 'destAddress', 'srcList'],
        format: 'source-filter: %s %s %s %s %s'
      },
      {
        // a=bundle-only
        name: 'bundleOnly',
        reg: /^(bundle-only)/
      },
      {
        // a=label:1
        name: 'label',
        reg: /^label:(.+)/,
        format: 'label:%s'
      },
      {
        // RFC version 26 for SCTP over DTLS
        // https://tools.ietf.org/html/draft-ietf-mmusic-sctp-sdp-26#section-5
        name: 'sctpPort',
        reg: /^sctp-port:(\d+)$/,
        format: 'sctp-port:%s'
      },
      {
        // RFC version 26 for SCTP over DTLS
        // https://tools.ietf.org/html/draft-ietf-mmusic-sctp-sdp-26#section-6
        name: 'maxMessageSize',
        reg: /^max-message-size:(\d+)$/,
        format: 'max-message-size:%s'
      },
      {
        // RFC7273
        // a=ts-refclk:ptp=IEEE1588-2008:39-A7-94-FF-FE-07-CB-D0:37
        push:'tsRefClocks',
        reg: /^ts-refclk:([^\s=]*)(?:=(\S*))?/,
        names: ['clksrc', 'clksrcExt'],
        format: function (o) {
          return 'ts-refclk:%s' + (o.clksrcExt != null ? '=%s' : '');
        }
      },
      {
        // RFC7273
        // a=mediaclk:direct=963214424
        name:'mediaClk',
        reg: /^mediaclk:(?:id=(\S*))? *([^\s=]*)(?:=(\S*))?(?: *rate=(\d+)\/(\d+))?/,
        names: ['id', 'mediaClockName', 'mediaClockValue', 'rateNumerator', 'rateDenominator'],
        format: function (o) {
          var str = 'mediaclk:';
          str += (o.id != null ? 'id=%s %s' : '%v%s');
          str += (o.mediaClockValue != null ? '=%s' : '');
          str += (o.rateNumerator != null ? ' rate=%s' : '');
          str += (o.rateDenominator != null ? '/%s' : '');
          return str;
        }
      },
      {
        // a=keywds:keywords
        name: 'keywords',
        reg: /^keywds:(.+)$/,
        format: 'keywds:%s'
      },
      {
        // a=content:main
        name: 'content',
        reg: /^content:(.+)/,
        format: 'content:%s'
      },
      // BFCP https://tools.ietf.org/html/rfc4583
      {
        // a=floorctrl:c-s
        name: 'bfcpFloorCtrl',
        reg: /^floorctrl:(c-only|s-only|c-s)/,
        format: 'floorctrl:%s'
      },
      {
        // a=confid:1
        name: 'bfcpConfId',
        reg: /^confid:(\d+)/,
        format: 'confid:%s'
      },
      {
        // a=userid:1
        name: 'bfcpUserId',
        reg: /^userid:(\d+)/,
        format: 'userid:%s'
      },
      {
        // a=floorid:1
        name: 'bfcpFloorId',
        reg: /^floorid:(.+) (?:m-stream|mstrm):(.+)/,
        names: ['id', 'mStream'],
        format: 'floorid:%s mstrm:%s'
      },
      {
        // any a= that we don't understand is kept verbatim on media.invalid
        push: 'invalid',
        names: ['value']
      }
    ]
  };
  
  // set sensible defaults to avoid polluting the grammar with boring details
  Object.keys(grammar).forEach(function (key) {
    var objs = grammar[key];
    objs.forEach(function (obj) {
      if (!obj.reg) {
        obj.reg = /(.*)/;
      }
      if (!obj.format) {
        obj.format = '%s';
      }
    });
  });
  
  },{}],35:[function(require,module,exports){
  var parser = require('./parser');
  var writer = require('./writer');
  
  exports.write = writer;
  exports.parse = parser.parse;
  exports.parseParams = parser.parseParams;
  exports.parseFmtpConfig = parser.parseFmtpConfig; // Alias of parseParams().
  exports.parsePayloads = parser.parsePayloads;
  exports.parseRemoteCandidates = parser.parseRemoteCandidates;
  exports.parseImageAttributes = parser.parseImageAttributes;
  exports.parseSimulcastStreamList = parser.parseSimulcastStreamList;
  
  },{"./parser":36,"./writer":37}],36:[function(require,module,exports){
  var toIntIfInt = function (v) {
    return String(Number(v)) === v ? Number(v) : v;
  };
  
  var attachProperties = function (match, location, names, rawName) {
    if (rawName && !names) {
      location[rawName] = toIntIfInt(match[1]);
    }
    else {
      for (var i = 0; i < names.length; i += 1) {
        if (match[i+1] != null) {
          location[names[i]] = toIntIfInt(match[i+1]);
        }
      }
    }
  };
  
  var parseReg = function (obj, location, content) {
    var needsBlank = obj.name && obj.names;
    if (obj.push && !location[obj.push]) {
      location[obj.push] = [];
    }
    else if (needsBlank && !location[obj.name]) {
      location[obj.name] = {};
    }
    var keyLocation = obj.push ?
      {} :  // blank object that will be pushed
      needsBlank ? location[obj.name] : location; // otherwise, named location or root
  
    attachProperties(content.match(obj.reg), keyLocation, obj.names, obj.name);
  
    if (obj.push) {
      location[obj.push].push(keyLocation);
    }
  };
  
  var grammar = require('./grammar');
  var validLine = RegExp.prototype.test.bind(/^([a-z])=(.*)/);
  
  exports.parse = function (sdp) {
    var session = {}
      , media = []
      , location = session; // points at where properties go under (one of the above)
  
    // parse lines we understand
    sdp.split(/(\r\n|\r|\n)/).filter(validLine).forEach(function (l) {
      var type = l[0];
      var content = l.slice(2);
      if (type === 'm') {
        media.push({rtp: [], fmtp: []});
        location = media[media.length-1]; // point at latest media line
      }
  
      for (var j = 0; j < (grammar[type] || []).length; j += 1) {
        var obj = grammar[type][j];
        if (obj.reg.test(content)) {
          return parseReg(obj, location, content);
        }
      }
    });
  
    session.media = media; // link it up
    return session;
  };
  
  var paramReducer = function (acc, expr) {
    var s = expr.split(/=(.+)/, 2);
    if (s.length === 2) {
      acc[s[0]] = toIntIfInt(s[1]);
    } else if (s.length === 1 && expr.length > 1) {
      acc[s[0]] = undefined;
    }
    return acc;
  };
  
  exports.parseParams = function (str) {
    return str.split(/;\s?/).reduce(paramReducer, {});
  };
  
  // For backward compatibility - alias will be removed in 3.0.0
  exports.parseFmtpConfig = exports.parseParams;
  
  exports.parsePayloads = function (str) {
    return str.toString().split(' ').map(Number);
  };
  
  exports.parseRemoteCandidates = function (str) {
    var candidates = [];
    var parts = str.split(' ').map(toIntIfInt);
    for (var i = 0; i < parts.length; i += 3) {
      candidates.push({
        component: parts[i],
        ip: parts[i + 1],
        port: parts[i + 2]
      });
    }
    return candidates;
  };
  
  exports.parseImageAttributes = function (str) {
    return str.split(' ').map(function (item) {
      return item.substring(1, item.length-1).split(',').reduce(paramReducer, {});
    });
  };
  
  exports.parseSimulcastStreamList = function (str) {
    return str.split(';').map(function (stream) {
      return stream.split(',').map(function (format) {
        var scid, paused = false;
  
        if (format[0] !== '~') {
          scid = toIntIfInt(format);
        } else {
          scid = toIntIfInt(format.substring(1, format.length));
          paused = true;
        }
  
        return {
          scid: scid,
          paused: paused
        };
      });
    });
  };
  
  },{"./grammar":34}],37:[function(require,module,exports){
  var grammar = require('./grammar');
  
  // customized util.format - discards excess arguments and can void middle ones
  var formatRegExp = /%[sdv%]/g;
  var format = function (formatStr) {
    var i = 1;
    var args = arguments;
    var len = args.length;
    return formatStr.replace(formatRegExp, function (x) {
      if (i >= len) {
        return x; // missing argument
      }
      var arg = args[i];
      i += 1;
      switch (x) {
      case '%%':
        return '%';
      case '%s':
        return String(arg);
      case '%d':
        return Number(arg);
      case '%v':
        return '';
      }
    });
    // NB: we discard excess arguments - they are typically undefined from makeLine
  };
  
  var makeLine = function (type, obj, location) {
    var str = obj.format instanceof Function ?
      (obj.format(obj.push ? location : location[obj.name])) :
      obj.format;
  
    var args = [type + '=' + str];
    if (obj.names) {
      for (var i = 0; i < obj.names.length; i += 1) {
        var n = obj.names[i];
        if (obj.name) {
          args.push(location[obj.name][n]);
        }
        else { // for mLine and push attributes
          args.push(location[obj.names[i]]);
        }
      }
    }
    else {
      args.push(location[obj.name]);
    }
    return format.apply(null, args);
  };
  
  // RFC specified order
  // TODO: extend this with all the rest
  var defaultOuterOrder = [
    'v', 'o', 's', 'i',
    'u', 'e', 'p', 'c',
    'b', 't', 'r', 'z', 'a'
  ];
  var defaultInnerOrder = ['i', 'c', 'b', 'a'];
  
  
  module.exports = function (session, opts) {
    opts = opts || {};
    // ensure certain properties exist
    if (session.version == null) {
      session.version = 0; // 'v=0' must be there (only defined version atm)
    }
    if (session.name == null) {
      session.name = ' '; // 's= ' must be there if no meaningful name set
    }
    session.media.forEach(function (mLine) {
      if (mLine.payloads == null) {
        mLine.payloads = '';
      }
    });
  
    var outerOrder = opts.outerOrder || defaultOuterOrder;
    var innerOrder = opts.innerOrder || defaultInnerOrder;
    var sdp = [];
  
    // loop through outerOrder for matching properties on session
    outerOrder.forEach(function (type) {
      grammar[type].forEach(function (obj) {
        if (obj.name in session && session[obj.name] != null) {
          sdp.push(makeLine(type, obj, session));
        }
        else if (obj.push in session && session[obj.push] != null) {
          session[obj.push].forEach(function (el) {
            sdp.push(makeLine(type, obj, el));
          });
        }
      });
    });
  
    // then for each media line, follow the innerOrder
    session.media.forEach(function (mLine) {
      sdp.push(makeLine('m', grammar.m[0], mLine));
  
      innerOrder.forEach(function (type) {
        grammar[type].forEach(function (obj) {
          if (obj.name in mLine && mLine[obj.name] != null) {
            sdp.push(makeLine(type, obj, mLine));
          }
          else if (obj.push in mLine && mLine[obj.push] != null) {
            mLine[obj.push].forEach(function (el) {
              sdp.push(makeLine(type, obj, el));
            });
          }
        });
      });
    });
  
    return sdp.join('\r\n') + '\r\n';
  };
  
  },{"./grammar":34}],38:[function(require,module,exports){
  module.exports={
    "name": "jssip",
    "title": "JsSIP",
    "description": "the Javascript SIP library",
    "version": "3.3.11",
    "homepage": "https://jssip.net",
    "author": "José Luis Millán <jmillan@aliax.net> (https://github.com/jmillan)",
    "contributors": [
      "Iñaki Baz Castillo <ibc@aliax.net> (https://github.com/ibc)"
    ],
    "main": "lib-es5/JsSIP.js",
    "keywords": [
      "sip",
      "websocket",
      "webrtc",
      "node",
      "browser",
      "library"
    ],
    "license": "MIT",
    "repository": {
      "type": "git",
      "url": "https://github.com/versatica/JsSIP.git"
    },
    "bugs": {
      "url": "https://github.com/versatica/JsSIP/issues"
    },
    "dependencies": {
      "debug": "^4.1.1",
      "events": "^3.0.0",
      "sdp-transform": "^2.7.0"
    },
    "devDependencies": {
      "@babel/core": "^7.4.3",
      "@babel/preset-env": "^7.4.3",
      "ansi-colors": "^3.2.4",
      "browserify": "^16.2.3",
      "eslint": "^5.16.0",
      "fancy-log": "^1.3.3",
      "gulp": "^4.0.0",
      "gulp-babel": "^8.0.0",
      "gulp-eslint": "^5.0.0",
      "gulp-expect-file": "^1.0.1",
      "gulp-header": "^2.0.7",
      "gulp-nodeunit-runner": "^0.2.2",
      "gulp-plumber": "^1.2.1",
      "gulp-rename": "^1.4.0",
      "gulp-uglify-es": "^1.0.4",
      "pegjs": "^0.7.0",
      "vinyl-buffer": "^1.0.1",
      "vinyl-source-stream": "^2.0.0"
    },
    "scripts": {
      "lint": "gulp lint",
      "test": "gulp test",
      "prepublishOnly": "gulp babel"
    }
  }
  
  },{}]},{},[8])(8)
  });
  