-
Notifications
You must be signed in to change notification settings - Fork 28.2k
/
test-net-autoselectfamily-commandline-option.js
108 lines (85 loc) Β· 3.09 KB
/
test-net-autoselectfamily-commandline-option.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
'use strict';
// Flags: --enable-network-family-autoselection
const common = require('../common');
const { parseDNSPacket, writeDNSPacket } = require('../common/dns');
const assert = require('assert');
const dgram = require('dgram');
const { Resolver } = require('dns');
const { createConnection, createServer } = require('net');
// Test that happy eyeballs algorithm can be enable from command line.
let autoSelectFamilyAttemptTimeout = common.platformTimeout(250);
if (common.isWindows) {
// Some of the windows machines in the CI need more time to establish connection
autoSelectFamilyAttemptTimeout = common.platformTimeout(1500);
}
function _lookup(resolver, hostname, options, cb) {
resolver.resolve(hostname, 'ANY', (err, replies) => {
assert.notStrictEqual(options.family, 4);
if (err) {
return cb(err);
}
const hosts = replies
.map((r) => ({ address: r.address, family: r.type === 'AAAA' ? 6 : 4 }))
.sort((a, b) => b.family - a.family);
if (options.all === true) {
return cb(null, hosts);
}
return cb(null, hosts[0].address, hosts[0].family);
});
}
function createDnsServer(ipv6Addr, ipv4Addr, cb) {
// Create a DNS server which replies with a AAAA and a A record for the same host
const socket = dgram.createSocket('udp4');
socket.on('message', common.mustCall((msg, { address, port }) => {
const parsed = parseDNSPacket(msg);
const domain = parsed.questions[0].domain;
assert.strictEqual(domain, 'example.org');
socket.send(writeDNSPacket({
id: parsed.id,
questions: parsed.questions,
answers: [
{ type: 'AAAA', address: ipv6Addr, ttl: 123, domain: 'example.org' },
{ type: 'A', address: ipv4Addr, ttl: 123, domain: 'example.org' },
]
}), port, address);
}));
socket.bind(0, () => {
const resolver = new Resolver();
resolver.setServers([`127.0.0.1:${socket.address().port}`]);
cb({ dnsServer: socket, lookup: _lookup.bind(null, resolver) });
});
}
// Test that IPV4 is reached if IPV6 is not reachable
{
createDnsServer('::1', '127.0.0.1', common.mustCall(function({ dnsServer, lookup }) {
const ipv4Server = createServer((socket) => {
socket.on('data', common.mustCall(() => {
socket.write('response-ipv4');
socket.end();
}));
});
ipv4Server.listen(0, '127.0.0.1', common.mustCall(() => {
const port = ipv4Server.address().port;
const connection = createConnection({
host: 'example.org',
port: port,
lookup,
autoSelectFamilyAttemptTimeout,
});
let response = '';
connection.setEncoding('utf-8');
connection.on('ready', common.mustCall(() => {
assert.deepStrictEqual(connection.autoSelectFamilyAttemptedAddresses, [`::1:${port}`, `127.0.0.1:${port}`]);
}));
connection.on('data', (chunk) => {
response += chunk;
});
connection.on('end', common.mustCall(() => {
assert.strictEqual(response, 'response-ipv4');
ipv4Server.close();
dnsServer.close();
}));
connection.write('request');
}));
}));
}