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// 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');
if (common.isWindows)
common.skip('dgram clustering is currently not supported on Windows.');
const NUM_WORKERS = 4;
const PACKETS_PER_WORKER = 10;
const cluster = require('cluster');
const dgram = require('dgram');
const assert = require('assert');
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);
});
}));
}
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