text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "remoting/signaling/jingle_info_request.h"
  
  #include "base/bind.h"
  #include "base/message_loop/message_loop.h"
  #include "base/stl_util.h"
  #include "base/strings/string_number_conversions.h"
  #include "base/time/time.h"
  #include "net/base/net_util.h"
  #include "remoting/signaling/iq_sender.h"
  #include "third_party/webrtc/base/socketaddress.h"
  #include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
  #include "third_party/webrtc/libjingle/xmpp/constants.h"
  
  namespace remoting {
  
  const int kRequestTimeoutSeconds = 5;
  
  JingleInfoRequest::JingleInfoRequest(SignalStrategy* signal_strategy)
      : iq_sender_(signal_strategy) {
  }
  
  JingleInfoRequest::~JingleInfoRequest() {}
  
  void JingleInfoRequest::Send(const OnJingleInfoCallback& callback) {
    on_jingle_info_cb_ = callback;
    scoped_ptr<buzz::XmlElement> iq_body(
        new buzz::XmlElement(buzz::QN_JINGLE_INFO_QUERY, true));
    request_ = iq_sender_.SendIq(
        buzz::STR_GET, buzz::STR_EMPTY, iq_body.Pass(),
        base::Bind(&JingleInfoRequest::OnResponse, base::Unretained(this)));
    if (!request_) {
      // If we failed to send IqRequest it means that SignalStrategy is
      // disconnected. Notify the caller.
      std::vector<rtc::SocketAddress> stun_hosts;
      std::vector<std::string> relay_hosts;
      std::string relay_token;
      on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
      return;
    }
    request_->SetTimeout(base::TimeDelta::FromSeconds(kRequestTimeoutSeconds));
  }
  
  void JingleInfoRequest::OnResponse(IqRequest* request,
                                     const buzz::XmlElement* stanza) {
    std::vector<rtc::SocketAddress> stun_hosts;
    std::vector<std::string> relay_hosts;
    std::string relay_token;
  
    if (!stanza) {
      LOG(WARNING) << "Jingle info request has timed out.";
      on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
      return;
    }
  
    const buzz::XmlElement* query =
        stanza->FirstNamed(buzz::QN_JINGLE_INFO_QUERY);
    if (query == nullptr) {
      LOG(WARNING) << "No Jingle info found in Jingle Info query response."
                   << stanza->Str();
      on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
      return;
    }
  
    const buzz::XmlElement* stun = query->FirstNamed(buzz::QN_JINGLE_INFO_STUN);
    if (stun) {
      for (const buzz::XmlElement* server =
           stun->FirstNamed(buzz::QN_JINGLE_INFO_SERVER);
           server != nullptr;
           server = server->NextNamed(buzz::QN_JINGLE_INFO_SERVER)) {
        std::string host = server->Attr(buzz::QN_JINGLE_INFO_HOST);
        std::string port_str = server->Attr(buzz::QN_JINGLE_INFO_UDP);
        if (host != buzz::STR_EMPTY && port_str != buzz::STR_EMPTY) {
          int port;
          if (!base::StringToInt(port_str, &port)) {
            LOG(WARNING) << "Unable to parse port in stanza" << stanza->Str();
            continue;
          }
  
          stun_hosts.push_back(rtc::SocketAddress(host, port));
        }
      }
    }
  
    const buzz::XmlElement* relay = query->FirstNamed(buzz::QN_JINGLE_INFO_RELAY);
    if (relay) {
      relay_token = relay->TextNamed(buzz::QN_JINGLE_INFO_TOKEN);
      for (const buzz::XmlElement* server =
           relay->FirstNamed(buzz::QN_JINGLE_INFO_SERVER);
           server != nullptr;
           server = server->NextNamed(buzz::QN_JINGLE_INFO_SERVER)) {
        std::string host = server->Attr(buzz::QN_JINGLE_INFO_HOST);
        if (host != buzz::STR_EMPTY)
          relay_hosts.push_back(host);
      }
    }
  
    on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
  }
  
  }  // namespace remoting
  