node/test/parallel/test-dgram-bind-shared-ports.js

'use strict';
var common = require('../common');
var assert = require('assert');
var cluster = require('cluster');
var dgram = require('dgram');

function noop() {}

if (cluster.isMaster) {
  var worker1 = cluster.fork();

  if (common.isWindows) {
    var checkErrType = function(er) {
      assert.equal(er.code, 'ENOTSUP');
      worker1.kill();
    };

    worker1.on('error', common.mustCall(checkErrType, 1));
    return;
  }

  worker1.on('message', function(msg) {
    assert.equal(msg, 'success');
    var worker2 = cluster.fork();

    worker2.on('message', function(msg) {
      assert.equal(msg, 'socket2:EADDRINUSE');
      worker1.kill();
      worker2.kill();
    });
  });
} else {
  var socket1 = dgram.createSocket('udp4', noop);
  var socket2 = dgram.createSocket('udp4', noop);

  socket1.on('error', function(err) {
    // no errors expected
    process.send('socket1:' + err.code);
  });

  socket2.on('error', function(err) {
    // an error is expected on the second worker
    process.send('socket2:' + err.code);
  });

  socket1.bind({
    address: 'localhost',
    port: common.PORT,
    exclusive: false
  }, function() {
    socket2.bind({port: common.PORT + 1, exclusive: true}, function() {
      // the first worker should succeed
      process.send('success');
    });
  });
}