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
// deno-fmt-ignore-file// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';const common = require('../common');const assert = require('assert');const net = require('net');
function check(addressType, cb) {  const server = net.createServer(function(client) {    client.end();    server.close();    cb && cb();  });
  const address = addressType === 4 ? common.localhostIPv4 : '::1';  server.listen(0, address, common.mustCall(function() {    net.connect({      port: this.address().port,      host: 'localhost',      family: addressType,      lookup: lookup    }).on('lookup', common.mustCall(function(err, ip, type) {      assert.strictEqual(err, null);      assert.strictEqual(address, ip);      assert.strictEqual(type, addressType);    }));  }));
  function lookup(host, dnsopts, cb) {    dnsopts.family = addressType;    if (addressType === 4) {      process.nextTick(function() {        cb(null, common.localhostIPv4, 4);      });    } else {      process.nextTick(function() {        cb(null, '::1', 6);      });    }  }}
check(4, function() {  common.hasIPv6 && check(6);});
// Verify that bad lookup() IPs are handled.{  net.connect({    host: 'localhost',    port: 80,    lookup(host, dnsopts, cb) {      cb(null, undefined, 4);    }  }).on('error', common.expectsError({ code: 'ERR_INVALID_IP_ADDRESS' }));}