/
test-https-autoselectfamily.js
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test-https-autoselectfamily.js
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'use strict';
const common = require('../common');
if (!common.hasCrypto) {
common.skip('missing crypto');
}
const { parseDNSPacket, writeDNSPacket } = require('../common/dns');
const fixtures = require('../common/fixtures');
const assert = require('assert');
const dgram = require('dgram');
const { Resolver } = require('dns');
const { request, createServer } = require('https');
if (!common.hasCrypto)
common.skip('missing crypto');
const options = {
key: fixtures.readKey('agent1-key.pem'),
cert: fixtures.readKey('agent1-cert.pem')
};
// Test that happy eyeballs algorithm is properly implemented when using HTTP.
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:${socket.address().port}`]);
cb({ dnsServer: socket, lookup: _lookup.bind(null, resolver) });
});
}
// Test that IPV4 is reached if IPV6 is not reachable
{
createDnsServer('::1', '127.0.0.1', common.mustCall(function({ dnsServer, lookup }) {
const ipv4Server = createServer(options, common.mustCall((_, res) => {
res.writeHead(200, { Connection: 'close' });
res.end('response-ipv4');
}));
ipv4Server.listen(0, '127.0.0.1', common.mustCall(() => {
request(
`https://example.org:${ipv4Server.address().port}/`,
{
lookup,
rejectUnauthorized: false,
autoSelectFamily: true,
autoSelectFamilyAttemptTimeout
},
(res) => {
assert.strictEqual(res.statusCode, 200);
res.setEncoding('utf-8');
let response = '';
res.on('data', (chunk) => {
response += chunk;
});
res.on('end', common.mustCall(() => {
assert.strictEqual(response, 'response-ipv4');
ipv4Server.close();
dnsServer.close();
}));
}
).end();
}));
}));
}
// Test that IPV4 is NOT reached if IPV6 is reachable
if (common.hasIPv6) {
createDnsServer('::1', '127.0.0.1', common.mustCall(function({ dnsServer, lookup }) {
const ipv4Server = createServer(options, common.mustNotCall((_, res) => {
res.writeHead(200, { Connection: 'close' });
res.end('response-ipv4');
}));
const ipv6Server = createServer(options, common.mustCall((_, res) => {
res.writeHead(200, { Connection: 'close' });
res.end('response-ipv6');
}));
ipv4Server.listen(0, '127.0.0.1', common.mustCall(() => {
const port = ipv4Server.address().port;
ipv6Server.listen(port, '::1', common.mustCall(() => {
request(
`https://example.org:${ipv4Server.address().port}/`,
{
lookup,
rejectUnauthorized: false,
autoSelectFamily: true,
autoSelectFamilyAttemptTimeout,
},
(res) => {
assert.strictEqual(res.statusCode, 200);
res.setEncoding('utf-8');
let response = '';
res.on('data', (chunk) => {
response += chunk;
});
res.on('end', common.mustCall(() => {
assert.strictEqual(response, 'response-ipv6');
ipv4Server.close();
ipv6Server.close();
dnsServer.close();
}));
}
).end();
}));
}));
}));
}