/* * 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. * * Because it's not really possible to predict how the messages will be * distributed among the parent and the child processes, we keep sending * messages until both the parent and the child received at least one * message. The worst case scenario is when either one never receives * a message. In this case the test runner will timeout after 60 secs * and the test will fail. */ var dgram = require('dgram'); var fork = require('child_process').fork; var assert = require('assert'); var common = require('../common'); if (process.platform === 'win32') { console.error('Sending dgram sockets to child processes not supported'); process.exit(0); } if (process.argv[2] === 'child') { var childCollected = 0; var server; process.on('message', function removeMe(msg, clusterServer) { if (msg === 'server') { server = clusterServer; server.on('message', function () { process.send('gotMessage'); }); } else if (msg === 'stop') { server.close(); process.removeListener('message', removeMe); } }); } else { var server = dgram.createSocket('udp4'); var client = dgram.createSocket('udp4'); var child = fork(__filename, ['child']); var msg = new Buffer('Some bytes'); var childGotMessage = false; var parentGotMessage = false; server.on('message', function (msg, rinfo) { parentGotMessage = true; }); server.on('listening', function () { child.send('server', server); child.once('message', function (msg) { if (msg === 'gotMessage') { childGotMessage = true; } }); sendMessages(); }); var sendMessages = function () { var timer = setInterval(function () { client.send(msg, 0, msg.length, common.PORT, '127.0.0.1', function(err) { if (err) throw err; } ); /* * Both the parent and the child got at least one message, * test passed, clean up everyting. */ if (parentGotMessage && childGotMessage) { clearInterval(timer); shutdown(); } }, 1); }; var shutdown = function () { child.send('stop'); server.close(); client.close(); }; server.bind(common.PORT, '127.0.0.1'); process.once('exit', function () { assert(parentGotMessage); assert(childGotMessage); }); }