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deps: cherry-pick 0ef4a0c64b6 from c-ares upstream #15023

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deps: cherry-pick 0ef4a0c64b6 from c-ares upstream #15023

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089b24e
deps: cherry-pick 0ef4a0c64b6 from c-ares upstream
addaleax Aug 14, 2017
32c5a63
test: add regression test for 14814
addaleax Aug 24, 2017
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test: add regression test for 14814 
Ref: #14814
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@addaleax
addaleax committed Aug 24, 2017
commit 32c5a6360936c84204a5f592e6b282e3b4dc3d5d
29 changes: 29 additions & 0 deletions test/parallel/test-dns-cancel-reverse-lookup.js
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'use strict';
const common = require('../common');
const dnstools = require('../common/dns');
const { Resolver } = require('dns');
const assert = require('assert');
const dgram = require('dgram');

const server = dgram.createSocket('udp4');
const resolver = new Resolver();

server.bind(0, common.mustCall(() => {
resolver.setServers([`127.0.0.1:${server.address().port}`]);
resolver.reverse('123.45.67.89', common.mustCall((err, res) => {
assert.strictEqual(err.code, 'ECANCELLED');
assert.strictEqual(err.errno, 'ECANCELLED');
assert.strictEqual(err.syscall, 'getHostByAddr');
assert.strictEqual(err.hostname, '123.45.67.89');
server.close();
}));
}));

server.on('message', common.mustCall((msg, { address, port }) => {
const parsed = dnstools.parseDNSPacket(msg);
const domain = parsed.questions[0].domain;
assert.strictEqual(domain, '89.67.45.123.in-addr.arpa');

// Do not send a reply.
resolver.cancel();
}));