'use strict'; var NUM_WORKERS = 4; var PACKETS_PER_WORKER = 10; var cluster = require('cluster'); var common = require('../common'); var dgram = require('dgram'); if (common.isWindows) { common.skip('dgram clustering is currently not supported ' + 'on windows.'); return; } if (cluster.isMaster) master(); else worker(); function master() { var received = 0; // Start listening on a socket. var socket = dgram.createSocket('udp4'); socket.bind(common.PORT); // Disconnect workers when the expected number of messages have been // received. socket.on('message', function(data, info) { received++; if (received == PACKETS_PER_WORKER * NUM_WORKERS) { console.log('master received %d packets', received); // Close the socket. socket.close(); // Disconnect all workers. cluster.disconnect(); } }); // Fork workers. for (var i = 0; i < NUM_WORKERS; i++) cluster.fork(); } function worker() { // Create udp socket and send packets to master. var socket = dgram.createSocket('udp4'); var buf = Buffer.from('hello world'); // This test is intended to exercise the cluster binding of udp sockets, but // since sockets aren't clustered when implicitly bound by at first call of // send(), explicitly bind them to an ephemeral port. socket.bind(0); for (var i = 0; i < PACKETS_PER_WORKER; i++) socket.send(buf, 0, buf.length, common.PORT, '127.0.0.1'); console.log('worker %d sent %d packets', cluster.worker.id, PACKETS_PER_WORKER); }