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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.inFreeBSDJail)
common.skip('in a FreeBSD jail');
const assert = require('assert');
const dgram = require('dgram');
const util = require('util');
const networkInterfaces = require('os').networkInterfaces();
const { fork } = require('child_process');
const LOCAL_BROADCAST_HOST = '255.255.255.255';
const TIMEOUT = common.platformTimeout(5000);
const messages = [
Buffer.from('First message to send'),
Buffer.from('Second message to send'),
Buffer.from('Third message to send'),
Buffer.from('Fourth message to send'),
];
let bindAddress = null;
// Take the first non-internal interface as the address for binding.
// Ideally, this should check for whether or not an interface is set up for
// BROADCAST and favor internal/private interfaces.
get_bindAddress: for (const name in networkInterfaces) {
const interfaces = networkInterfaces[name];
for (let i = 0; i < interfaces.length; i++) {
const localInterface = interfaces[i];
if (!localInterface.internal && localInterface.family === 'IPv4') {
bindAddress = localInterface.address;
break get_bindAddress;
}
}
}
assert.ok(bindAddress);
if (process.argv[2] !== 'child') {
const workers = {};
const listeners = 3;
let listening = 0;
let dead = 0;
let i = 0;
let done = 0;
let timer = null;
// Exit the test if it doesn't succeed within TIMEOUT
timer = setTimeout(() => {
console.error('[PARENT] Responses were not received within %d ms.',
TIMEOUT);
console.error('[PARENT] Fail');
killSubprocesses(workers);
process.exit(1);
}, TIMEOUT);
// Launch child processes
for (let x = 0; x < listeners; x++) {
(function() {
const worker = fork(process.argv[1], ['child']);
workers[worker.pid] = worker;
worker.messagesReceived = [];
// Handle the death of workers
worker.on('exit', (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);
assert.notStrictEqual(signal, null);
if (dead === listeners) {
console.error('[PARENT] All workers have died.');
console.error('[PARENT] Fail');
killSubprocesses(workers);
process.exit(1);
}
});
worker.on('message', (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((pid) => {
const worker = workers[pid];
let count = 0;
worker.messagesReceived.forEach((buf) => {
for (let 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.strictEqual(count, messages.length);
});
clearTimeout(timer);
console.error('[PARENT] Success');
killSubprocesses(workers);
}
}
});
})(x);
}
const sendSocket = dgram.createSocket({
type: 'udp4',
reuseAddr: true
});
// Bind the address explicitly for sending
// INADDR_BROADCAST to only one interface
sendSocket.bind(common.PORT, bindAddress);
sendSocket.on('listening', () => {
sendSocket.setBroadcast(true);
});
sendSocket.on('close', () => {
console.error('[PARENT] sendSocket closed');
});
sendSocket.sendNext = function() {
const buf = messages[i++];
if (!buf) {
try { sendSocket.close(); } catch {
// Continue regardless of error.
}
return;
}
sendSocket.send(
buf,
0,
buf.length,
common.PORT,
LOCAL_BROADCAST_HOST,
(err) => {
assert.ifError(err);
console.error('[PARENT] sent %s to %s:%s',
util.inspect(buf.toString()),
LOCAL_BROADCAST_HOST, common.PORT);
process.nextTick(sendSocket.sendNext);
}
);
};
function killSubprocesses(subprocesses) {
Object.keys(subprocesses).forEach((key) => {
const subprocess = subprocesses[key];
subprocess.kill();
});
}
}
if (process.argv[2] === 'child') {
const receivedMessages = [];
const listenSocket = dgram.createSocket({
type: 'udp4',
reuseAddr: true
});
listenSocket.on('message', (buf, rinfo) => {
// Receive udp messages only sent from parent
if (rinfo.address !== bindAddress) return;
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) {
process.nextTick(() => { listenSocket.close(); });
}
});
listenSocket.on('close', () => {
// 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 indicative of some other issue.
setTimeout(() => { process.exit(); }, 1000);
});
listenSocket.on('listening', () => { process.send({ listening: true }); });
listenSocket.bind(common.PORT);
}
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