1'use strict'; 2const common = require('../common'); 3const dnstools = require('../common/dns'); 4const dns = require('dns'); 5const assert = require('assert'); 6const dgram = require('dgram'); 7const dnsPromises = dns.promises; 8 9const answers = [ 10 { type: 'A', address: '1.2.3.4', ttl: 123 }, 11 { type: 'AAAA', address: '::42', ttl: 123 }, 12 { type: 'MX', priority: 42, exchange: 'foobar.com', ttl: 124 }, 13 { type: 'NS', value: 'foobar.org', ttl: 457 }, 14 { type: 'TXT', entries: [ 'v=spf1 ~all', 'xyz\0foo' ] }, 15 { type: 'PTR', value: 'baz.org', ttl: 987 }, 16 { 17 type: 'SOA', 18 nsname: 'ns1.example.com', 19 hostmaster: 'admin.example.com', 20 serial: 156696742, 21 refresh: 900, 22 retry: 900, 23 expire: 1800, 24 minttl: 60 25 }, 26]; 27 28const server = dgram.createSocket('udp4'); 29 30server.on('message', common.mustCall((msg, { address, port }) => { 31 const parsed = dnstools.parseDNSPacket(msg); 32 const domain = parsed.questions[0].domain; 33 assert.strictEqual(domain, 'example.org'); 34 35 server.send(dnstools.writeDNSPacket({ 36 id: parsed.id, 37 questions: parsed.questions, 38 answers: answers.map((answer) => Object.assign({ domain }, answer)), 39 }), port, address); 40}, 2)); 41 42server.bind(0, common.mustCall(async () => { 43 const address = server.address(); 44 dns.setServers([`127.0.0.1:${address.port}`]); 45 46 validateResults(await dnsPromises.resolveAny('example.org')); 47 48 dns.resolveAny('example.org', common.mustCall((err, res) => { 49 assert.ifError(err); 50 validateResults(res); 51 server.close(); 52 })); 53})); 54 55function validateResults(res) { 56 // TTL values are only provided for A and AAAA entries. 57 assert.deepStrictEqual(res.map(maybeRedactTTL), answers.map(maybeRedactTTL)); 58} 59 60function maybeRedactTTL(r) { 61 const ret = { ...r }; 62 if (!['A', 'AAAA'].includes(r.type)) 63 delete ret.ttl; 64 return ret; 65} 66