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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');
const assert = require('assert');
const net = require('net');
// Test allowHalfOpen
{
let clientReceivedFIN = 0;
let serverConnections = 0;
let clientSentFIN = 0;
let serverReceivedFIN = 0;
const host = common.localhostIPv4;
function serverOnConnection(socket) {
console.log(`'connection' ${++serverConnections} emitted on server`);
const srvConn = serverConnections;
socket.resume();
socket.on('data', common.mustCall(function socketOnData(data) {
this.clientId = data.toString();
console.log(
`server connection ${srvConn} is started by client ${this.clientId}`);
}));
// 'end' on each socket must not be emitted twice
socket.on('end', common.mustCall(function socketOnEnd() {
console.log(`Server received FIN sent by client ${this.clientId}`);
if (++serverReceivedFIN < CLIENT_VARIANTS) return;
setTimeout(() => {
server.close();
console.log(`connection ${this.clientId} is closing the server:
FIN ${serverReceivedFIN} received by server,
FIN ${clientReceivedFIN} received by client
FIN ${clientSentFIN} sent by client,
FIN ${serverConnections} sent by server`.replace(/ {3,}/g, ''));
}, 50);
}, 1));
socket.end();
console.log(`Server has sent ${serverConnections} FIN`);
}
// These two levels of functions (and not arrows) are necessary in order to
// bind the `index`, and the calling socket (`this`)
function clientOnConnect(index) {
return common.mustCall(function clientOnConnectInner() {
const client = this;
console.log(`'connect' emitted on Client ${index}`);
client.resume();
client.on('end', common.mustCall(function clientOnEnd() {
setTimeout(function closeServer() {
// When allowHalfOpen is true, client must still be writable
// after the server closes the connections, but not readable
console.log(`client ${index} received FIN`);
assert(!client.readable);
assert(client.writable);
assert(client.write(String(index)));
client.end();
clientSentFIN++;
console.log(
`client ${index} sent FIN, ${clientSentFIN} have been sent`);
}, 50);
}));
client.on('close', common.mustCall(function clientOnClose() {
clientReceivedFIN++;
console.log(`connection ${index} has been closed by both sides,` +
` ${clientReceivedFIN} clients have closed`);
}));
});
}
function serverOnClose() {
console.log(`Server has been closed:
FIN ${serverReceivedFIN} received by server
FIN ${clientReceivedFIN} received by client
FIN ${clientSentFIN} sent by client
FIN ${serverConnections} sent by server`.replace(/ {3,}/g, ''));
}
function serverOnListen() {
const port = server.address().port;
console.log(`Server started listening at ${host}:${port}`);
const opts = { allowHalfOpen: true, host, port };
// 6 variations === CLIENT_VARIANTS
net.connect(opts, clientOnConnect(1));
net.connect(opts).on('connect', clientOnConnect(2));
net.createConnection(opts, clientOnConnect(3));
net.createConnection(opts).on('connect', clientOnConnect(4));
new net.Socket(opts).connect(opts, clientOnConnect(5));
new net.Socket(opts).connect(opts).on('connect', clientOnConnect(6));
}
const CLIENT_VARIANTS = 6;
// The trigger
const server = net.createServer({ allowHalfOpen: true })
.on('connection', common.mustCall(serverOnConnection, CLIENT_VARIANTS))
.on('close', common.mustCall(serverOnClose))
.listen(0, host, common.mustCall(serverOnListen));
}
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