// 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'; const common = require('../common'); const NUM_WORKERS = 4; const PACKETS_PER_WORKER = 10; const cluster = require('cluster'); const dgram = require('dgram'); const assert = require('assert'); if (common.isWindows) { common.skip('dgram clustering is currently not supported on Windows.'); return; } if (cluster.isMaster) master(); else worker(); function master() { let received = 0; // Start listening on a socket. const socket = dgram.createSocket('udp4'); socket.bind({ port: 0 }, common.mustCall(() => { // Fork workers. for (let i = 0; i < NUM_WORKERS; i++) { const worker = cluster.fork(); worker.send({ port: socket.address().port }); } })); // Disconnect workers when the expected number of messages have been // received. socket.on('message', common.mustCall((data, info) => { received++; if (received === PACKETS_PER_WORKER * NUM_WORKERS) { // Close the socket. socket.close(); // Disconnect all workers. cluster.disconnect(); } }, NUM_WORKERS * PACKETS_PER_WORKER)); } function worker() { // Create udp socket and send packets to master. const socket = dgram.createSocket('udp4'); const 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); process.on('message', common.mustCall((msg) => { assert(msg.port); // There is no guarantee that a sent dgram packet will be received so keep // sending until disconnect. const interval = setInterval(() => { socket.send(buf, 0, buf.length, msg.port, '127.0.0.1'); }, 1); cluster.worker.on('disconnect', () => { clearInterval(interval); }); })); }