// 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 common = require('../common'), assert = require('assert'), dgram = require('dgram'), util = require('util'), assert = require('assert'), Buffer = require('buffer').Buffer, fork = require('child_process').fork, LOCAL_BROADCAST_HOST = '224.0.0.114', TIMEOUT = 5000, messages = [ new Buffer('First message to send'), new Buffer('Second message to send'), new Buffer('Third message to send'), new Buffer('Fourth message to send') ]; if (process.argv[2] !== 'child') { var workers = {}, listeners = 3, listening = 0, dead = 0, i = 0, done = 0, timer = null; //exit the test if it doesn't succeed within TIMEOUT timer = setTimeout(function() { console.error('[PARENT] Responses were not received within %d ms.', TIMEOUT); console.error('[PARENT] Fail'); killChildren(workers); process.exit(1); }, TIMEOUT); //launch child processes for (var x = 0; x < listeners; x++) { (function() { var worker = fork(process.argv[1], ['child']); workers[worker.pid] = worker; worker.messagesReceived = []; //handle the death of workers worker.on('exit', function(code, signal) { // don't consider this the true death if the // worker has finished successfully // or if the exit code is 0 if (worker.isDone || code === 0) { return; } dead += 1; console.error('[PARENT] Worker %d died. %d dead of %d', worker.pid, dead, listeners); if (dead === listeners) { console.error('[PARENT] All workers have died.'); console.error('[PARENT] Fail'); killChildren(workers); process.exit(1); } }); worker.on('message', function(msg) { if (msg.listening) { listening += 1; if (listening === listeners) { //all child process are listening, so start sending sendSocket.sendNext(); } } else if (msg.message) { worker.messagesReceived.push(msg.message); if (worker.messagesReceived.length === messages.length) { done += 1; worker.isDone = true; console.error('[PARENT] %d received %d messages total.', worker.pid, worker.messagesReceived.length); } if (done === listeners) { console.error('[PARENT] All workers have received the ' + 'required number of messages. Will now compare.'); Object.keys(workers).forEach(function(pid) { var worker = workers[pid]; var count = 0; worker.messagesReceived.forEach(function(buf) { for (var i = 0; i < messages.length; ++i) { if (buf.toString() === messages[i].toString()) { count++; break; } } }); console.error('[PARENT] %d received %d matching messages.', worker.pid, count); assert.equal(count, messages.length, 'A worker received an invalid multicast message'); }); clearTimeout(timer); console.error('[PARENT] Success'); killChildren(workers); } } }); })(x); } var sendSocket = dgram.createSocket('udp4'); // FIXME a libuv limitation makes it necessary to bind() // before calling any of the set*() functions - the bind() // call is what creates the actual socket... sendSocket.bind(); sendSocket.setTTL(1); sendSocket.setBroadcast(true); sendSocket.setMulticastTTL(1); sendSocket.setMulticastLoopback(true); sendSocket.on('close', function() { console.error('[PARENT] sendSocket closed'); }); sendSocket.sendNext = function() { var buf = messages[i++]; if (!buf) { try { sendSocket.close(); } catch (e) {} return; } sendSocket.send(buf, 0, buf.length, common.PORT, LOCAL_BROADCAST_HOST, function(err) { if (err) throw err; console.error('[PARENT] sent %s to %s:%s', util.inspect(buf.toString()), LOCAL_BROADCAST_HOST, common.PORT); process.nextTick(sendSocket.sendNext); }); }; function killChildren(children) { Object.keys(children).forEach(function(key) { var child = children[key]; child.kill(); }); } } if (process.argv[2] === 'child') { var receivedMessages = []; var listenSocket = dgram.createSocket('udp4'); listenSocket.on('message', function(buf, rinfo) { console.error('[CHILD] %s received %s from %j', process.pid, util.inspect(buf.toString()), rinfo); receivedMessages.push(buf); process.send({ message: buf.toString() }); if (receivedMessages.length == messages.length) { listenSocket.dropMembership(LOCAL_BROADCAST_HOST); process.nextTick(function() { // TODO should be changed to below. // listenSocket.dropMembership(LOCAL_BROADCAST_HOST, function() { listenSocket.close(); }); } }); listenSocket.on('close', function() { //HACK: Wait to exit the process to ensure that the parent //process has had time to receive all messages via process.send() //This may be indicitave of some other issue. setTimeout(function() { process.exit(); }, 1000); }); listenSocket.on('listening', function() { process.send({ listening: true }); }); listenSocket.bind(common.PORT); listenSocket.addMembership(LOCAL_BROADCAST_HOST); }