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 server = dgram.createSocket('udp4'); 10 11server.on('message', common.mustCall((msg, { address, port }) => { 12 const parsed = dnstools.parseDNSPacket(msg); 13 const domain = parsed.questions[0].domain; 14 assert.strictEqual(domain, 'example.org'); 15 16 const buf = dnstools.writeDNSPacket({ 17 id: parsed.id, 18 questions: parsed.questions, 19 answers: { type: 'A', address: '1.2.3.4', ttl: 123, domain }, 20 }); 21 // Overwrite the # of answers with 2, which is incorrect. 22 buf.writeUInt16LE(2, 6); 23 server.send(buf, port, address); 24}, 2)); 25 26server.bind(0, common.mustCall(async () => { 27 const address = server.address(); 28 dns.setServers([`127.0.0.1:${address.port}`]); 29 30 dnsPromises.resolveAny('example.org') 31 .then(common.mustNotCall()) 32 .catch(common.expectsError({ 33 code: 'EBADRESP', 34 syscall: 'queryAny', 35 hostname: 'example.org' 36 })); 37 38 dns.resolveAny('example.org', common.mustCall((err) => { 39 assert.strictEqual(err.code, 'EBADRESP'); 40 assert.strictEqual(err.syscall, 'queryAny'); 41 assert.strictEqual(err.hostname, 'example.org'); 42 const descriptor = Object.getOwnPropertyDescriptor(err, 'message'); 43 // The error message should be non-enumerable. 44 assert.strictEqual(descriptor.enumerable, false); 45 server.close(); 46 })); 47})); 48