text: // 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.
  
  'use strict';
  /*
   * The purpose of this test is to make sure that when forking a process,
   * sending a fd representing a UDP socket to the child and sending messages
   * to this endpoint, these messages are distributed to the parent and the
   * child process.
   */
  
  const common = require('../common');
  const dgram = require('dgram');
  const fork = require('child_process').fork;
  const assert = require('assert');
  
  if (common.isWindows) {
    common.skip('Sending dgram sockets to child processes is not supported');
    return;
  }
  
  if (process.argv[2] === 'child') {
    let childServer;
  
    process.once('message', function(msg, clusterServer) {
      childServer = clusterServer;
  
      childServer.once('message', function() {
        process.send('gotMessage');
        childServer.close();
      });
  
      process.send('handleReceived');
    });
  
  } else {
    const parentServer = dgram.createSocket('udp4');
    const client = dgram.createSocket('udp4');
    const child = fork(__filename, ['child']);
  
    const msg = Buffer.from('Some bytes');
  
    let childGotMessage = false;
    let parentGotMessage = false;
  
    parentServer.once('message', function(msg, rinfo) {
      parentGotMessage = true;
      parentServer.close();
    });
  
    parentServer.on('listening', function() {
      child.send('server', parentServer);
  
      child.on('message', function(msg) {
        if (msg === 'gotMessage') {
          childGotMessage = true;
        } else if (msg = 'handlReceived') {
          sendMessages();
        }
      });
    });
  
    function sendMessages() {
      const serverPort = parentServer.address().port;
  
      const timer = setInterval(function() {
        /*
         * Both the parent and the child got at least one message,
         * test passed, clean up everything.
         */
        if (parentGotMessage && childGotMessage) {
          clearInterval(timer);
          client.close();
        } else {
          client.send(
            msg,
            0,
            msg.length,
            serverPort,
            '127.0.0.1',
            function(err) {
              assert.ifError(err);
            }
          );
        }
      }, 1);
    }
  
    parentServer.bind(0, '127.0.0.1');
  
    process.once('exit', function() {
      assert(parentGotMessage);
      assert(childGotMessage);
    });
  }
  