• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1// Copyright Joyent, Inc. and other Node contributors.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the
5// "Software"), to deal in the Software without restriction, including
6// without limitation the rights to use, copy, modify, merge, publish,
7// distribute, sublicense, and/or sell copies of the Software, and to permit
8// persons to whom the Software is furnished to do so, subject to the
9// following conditions:
10//
11// The above copyright notice and this permission notice shall be included
12// in all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20// USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22'use strict';
23const common = require('../common');
24const dnstools = require('../common/dns');
25const assert = require('assert');
26
27const dns = require('dns');
28const dnsPromises = dns.promises;
29const dgram = require('dgram');
30
31const existing = dns.getServers();
32assert(existing.length > 0);
33
34// Verify that setServers() handles arrays with holes and other oddities
35{
36  const servers = [];
37
38  servers[0] = '127.0.0.1';
39  servers[2] = '0.0.0.0';
40  dns.setServers(servers);
41
42  assert.deepStrictEqual(dns.getServers(), ['127.0.0.1', '0.0.0.0']);
43}
44
45{
46  const servers = ['127.0.0.1', '192.168.1.1'];
47
48  servers[3] = '127.1.0.1';
49  servers[4] = '127.1.0.1';
50  servers[5] = '127.1.1.1';
51
52  Object.defineProperty(servers, 2, {
53    enumerable: true,
54    get: () => {
55      servers.length = 3;
56      return '0.0.0.0';
57    }
58  });
59
60  dns.setServers(servers);
61  assert.deepStrictEqual(dns.getServers(), [
62    '127.0.0.1',
63    '192.168.1.1',
64    '0.0.0.0'
65  ]);
66}
67
68{
69  // Various invalidities, all of which should throw a clean error.
70  const invalidServers = [
71    ' ',
72    '\n',
73    '\0',
74    '1'.repeat(3 * 4),
75    // Check for REDOS issues.
76    ':'.repeat(100000),
77    '['.repeat(100000),
78    '['.repeat(100000) + ']'.repeat(100000) + 'a'
79  ];
80  invalidServers.forEach((serv) => {
81    assert.throws(
82      () => {
83        dns.setServers([serv]);
84      },
85      {
86        name: 'TypeError',
87        code: 'ERR_INVALID_IP_ADDRESS'
88      }
89    );
90  });
91}
92
93const goog = [
94  '8.8.8.8',
95  '8.8.4.4',
96];
97dns.setServers(goog);
98assert.deepStrictEqual(dns.getServers(), goog);
99assert.throws(() => dns.setServers(['foobar']), {
100  code: 'ERR_INVALID_IP_ADDRESS',
101  name: 'TypeError',
102  message: 'Invalid IP address: foobar'
103});
104assert.throws(() => dns.setServers(['127.0.0.1:va']), {
105  code: 'ERR_INVALID_IP_ADDRESS',
106  name: 'TypeError',
107  message: 'Invalid IP address: 127.0.0.1:va'
108});
109assert.deepStrictEqual(dns.getServers(), goog);
110
111const goog6 = [
112  '2001:4860:4860::8888',
113  '2001:4860:4860::8844',
114];
115dns.setServers(goog6);
116assert.deepStrictEqual(dns.getServers(), goog6);
117
118goog6.push('4.4.4.4');
119dns.setServers(goog6);
120assert.deepStrictEqual(dns.getServers(), goog6);
121
122const ports = [
123  '4.4.4.4:53',
124  '[2001:4860:4860::8888]:53',
125  '103.238.225.181:666',
126  '[fe80::483a:5aff:fee6:1f04]:666',
127  '[fe80::483a:5aff:fee6:1f04]',
128];
129const portsExpected = [
130  '4.4.4.4',
131  '2001:4860:4860::8888',
132  '103.238.225.181:666',
133  '[fe80::483a:5aff:fee6:1f04]:666',
134  'fe80::483a:5aff:fee6:1f04',
135];
136dns.setServers(ports);
137assert.deepStrictEqual(dns.getServers(), portsExpected);
138
139dns.setServers([]);
140assert.deepStrictEqual(dns.getServers(), []);
141
142{
143  const errObj = {
144    code: 'ERR_INVALID_ARG_TYPE',
145    name: 'TypeError',
146    message: 'The "rrtype" argument must be of type string. ' +
147             'Received an instance of Array'
148  };
149  assert.throws(() => {
150    dns.resolve('example.com', [], common.mustNotCall());
151  }, errObj);
152  assert.throws(() => {
153    dnsPromises.resolve('example.com', []);
154  }, errObj);
155}
156{
157  const errObj = {
158    code: 'ERR_INVALID_ARG_TYPE',
159    name: 'TypeError',
160    message: 'The "name" argument must be of type string. ' +
161             'Received undefined'
162  };
163  assert.throws(() => {
164    dnsPromises.resolve();
165  }, errObj);
166}
167
168// dns.lookup should accept only falsey and string values
169{
170  const errorReg = {
171    code: 'ERR_INVALID_ARG_TYPE',
172    name: 'TypeError',
173    message: /^The "hostname" argument must be of type string\. Received .*/
174  };
175
176  assert.throws(() => dns.lookup({}, common.mustNotCall()), errorReg);
177
178  assert.throws(() => dns.lookup([], common.mustNotCall()), errorReg);
179
180  assert.throws(() => dns.lookup(true, common.mustNotCall()), errorReg);
181
182  assert.throws(() => dns.lookup(1, common.mustNotCall()), errorReg);
183
184  assert.throws(() => dns.lookup(common.mustNotCall(), common.mustNotCall()),
185                errorReg);
186
187  assert.throws(() => dnsPromises.lookup({}), errorReg);
188  assert.throws(() => dnsPromises.lookup([]), errorReg);
189  assert.throws(() => dnsPromises.lookup(true), errorReg);
190  assert.throws(() => dnsPromises.lookup(1), errorReg);
191  assert.throws(() => dnsPromises.lookup(common.mustNotCall()), errorReg);
192}
193
194// dns.lookup should accept falsey values
195{
196  const checkCallback = (err, address, family) => {
197    assert.ifError(err);
198    assert.strictEqual(address, null);
199    assert.strictEqual(family, 4);
200  };
201
202  ['', null, undefined, 0, NaN].forEach(async (value) => {
203    const res = await dnsPromises.lookup(value);
204    assert.deepStrictEqual(res, { address: null, family: 4 });
205    dns.lookup(value, common.mustCall(checkCallback));
206  });
207}
208
209{
210  /*
211  * Make sure that dns.lookup throws if hints does not represent a valid flag.
212  * (dns.V4MAPPED | dns.ADDRCONFIG | dns.ALL) + 1 is invalid because:
213  * - it's different from dns.V4MAPPED and dns.ADDRCONFIG and dns.ALL.
214  * - it's different from any subset of them bitwise ored.
215  * - it's different from 0.
216  * - it's an odd number different than 1, and thus is invalid, because
217  * flags are either === 1 or even.
218  */
219  const hints = (dns.V4MAPPED | dns.ADDRCONFIG | dns.ALL) + 1;
220  const err = {
221    code: 'ERR_INVALID_OPT_VALUE',
222    name: 'TypeError',
223    message: /The value "\d+" is invalid for option "hints"/
224  };
225
226  assert.throws(() => {
227    dnsPromises.lookup('nodejs.org', { hints });
228  }, err);
229  assert.throws(() => {
230    dns.lookup('nodejs.org', { hints }, common.mustNotCall());
231  }, err);
232}
233
234assert.throws(() => dns.lookup('nodejs.org'), {
235  code: 'ERR_INVALID_CALLBACK',
236  name: 'TypeError'
237});
238
239assert.throws(() => dns.lookup('nodejs.org', 4), {
240  code: 'ERR_INVALID_CALLBACK',
241  name: 'TypeError'
242});
243
244dns.lookup('', { family: 4, hints: 0 }, common.mustCall());
245
246dns.lookup('', {
247  family: 6,
248  hints: dns.ADDRCONFIG
249}, common.mustCall());
250
251dns.lookup('', { hints: dns.V4MAPPED }, common.mustCall());
252
253dns.lookup('', {
254  hints: dns.ADDRCONFIG | dns.V4MAPPED
255}, common.mustCall());
256
257dns.lookup('', {
258  hints: dns.ALL
259}, common.mustCall());
260
261dns.lookup('', {
262  hints: dns.V4MAPPED | dns.ALL
263}, common.mustCall());
264
265dns.lookup('', {
266  hints: dns.ADDRCONFIG | dns.V4MAPPED | dns.ALL
267}, common.mustCall());
268
269(async function() {
270  await dnsPromises.lookup('', { family: 4, hints: 0 });
271  await dnsPromises.lookup('', { family: 6, hints: dns.ADDRCONFIG });
272  await dnsPromises.lookup('', { hints: dns.V4MAPPED });
273  await dnsPromises.lookup('', { hints: dns.ADDRCONFIG | dns.V4MAPPED });
274  await dnsPromises.lookup('', { hints: dns.ALL });
275  await dnsPromises.lookup('', { hints: dns.V4MAPPED | dns.ALL });
276  await dnsPromises.lookup('', {
277    hints: dns.ADDRCONFIG | dns.V4MAPPED | dns.ALL
278  });
279})();
280
281{
282  const err = {
283    code: 'ERR_MISSING_ARGS',
284    name: 'TypeError',
285    message: 'The "address", "port", and "callback" arguments must be ' +
286    'specified'
287  };
288
289  assert.throws(() => dns.lookupService('0.0.0.0'), err);
290  err.message = 'The "address" and "port" arguments must be specified';
291  assert.throws(() => dnsPromises.lookupService('0.0.0.0'), err);
292}
293
294{
295  const invalidAddress = 'fasdfdsaf';
296  const err = {
297    code: 'ERR_INVALID_OPT_VALUE',
298    name: 'TypeError',
299    message: `The value "${invalidAddress}" is invalid for option "address"`
300  };
301
302  assert.throws(() => {
303    dnsPromises.lookupService(invalidAddress, 0);
304  }, err);
305
306  assert.throws(() => {
307    dns.lookupService(invalidAddress, 0, common.mustNotCall());
308  }, err);
309}
310
311const portErr = (port) => {
312  const err = {
313    code: 'ERR_SOCKET_BAD_PORT',
314    message:
315      `Port should be >= 0 and < 65536. Received ${port}.`,
316    name: 'RangeError'
317  };
318
319  assert.throws(() => {
320    dnsPromises.lookupService('0.0.0.0', port);
321  }, err);
322
323  assert.throws(() => {
324    dns.lookupService('0.0.0.0', port, common.mustNotCall());
325  }, err);
326};
327portErr(null);
328portErr(undefined);
329portErr(65538);
330portErr('test');
331
332assert.throws(() => {
333  dns.lookupService('0.0.0.0', 80, null);
334}, {
335  code: 'ERR_INVALID_CALLBACK',
336  name: 'TypeError'
337});
338
339{
340  dns.resolveMx('foo.onion', function(err) {
341    assert.deepStrictEqual(err.errno, 'ENOTFOUND');
342    assert.deepStrictEqual(err.code, 'ENOTFOUND');
343    assert.deepStrictEqual(err.syscall, 'queryMx');
344    assert.deepStrictEqual(err.hostname, 'foo.onion');
345    assert.deepStrictEqual(err.message, 'queryMx ENOTFOUND foo.onion');
346  });
347}
348
349{
350  const cases = [
351    { method: 'resolveAny',
352      answers: [
353        { type: 'A', address: '1.2.3.4', ttl: 3333333333 },
354        { type: 'AAAA', address: '::42', ttl: 3333333333 },
355        { type: 'MX', priority: 42, exchange: 'foobar.com', ttl: 3333333333 },
356        { type: 'NS', value: 'foobar.org', ttl: 3333333333 },
357        { type: 'PTR', value: 'baz.org', ttl: 3333333333 },
358        {
359          type: 'SOA',
360          nsname: 'ns1.example.com',
361          hostmaster: 'admin.example.com',
362          serial: 3210987654,
363          refresh: 900,
364          retry: 900,
365          expire: 1800,
366          minttl: 3333333333
367        },
368      ]
369    },
370
371    { method: 'resolve4',
372      options: { ttl: true },
373      answers: [ { type: 'A', address: '1.2.3.4', ttl: 3333333333 } ]
374    },
375
376    { method: 'resolve6',
377      options: { ttl: true },
378      answers: [ { type: 'AAAA', address: '::42', ttl: 3333333333 } ]
379    },
380
381    { method: 'resolveSoa',
382      answers: [
383        {
384          type: 'SOA',
385          nsname: 'ns1.example.com',
386          hostmaster: 'admin.example.com',
387          serial: 3210987654,
388          refresh: 900,
389          retry: 900,
390          expire: 1800,
391          minttl: 3333333333
392        }
393      ]
394    },
395  ];
396
397  const server = dgram.createSocket('udp4');
398
399  server.on('message', common.mustCall((msg, { address, port }) => {
400    const parsed = dnstools.parseDNSPacket(msg);
401    const domain = parsed.questions[0].domain;
402    assert.strictEqual(domain, 'example.org');
403
404    server.send(dnstools.writeDNSPacket({
405      id: parsed.id,
406      questions: parsed.questions,
407      answers: cases[0].answers.map(
408        (answer) => Object.assign({ domain }, answer)
409      ),
410    }), port, address);
411  }, cases.length * 2));
412
413  server.bind(0, common.mustCall(() => {
414    const address = server.address();
415    dns.setServers([`127.0.0.1:${address.port}`]);
416
417    function validateResults(res) {
418      if (!Array.isArray(res))
419        res = [res];
420
421      assert.deepStrictEqual(res.map(tweakEntry),
422                             cases[0].answers.map(tweakEntry));
423    }
424
425    function tweakEntry(r) {
426      const ret = { ...r };
427
428      const { method } = cases[0];
429
430      // TTL values are only provided for A and AAAA entries.
431      if (!['A', 'AAAA'].includes(ret.type) && !/^resolve(4|6)?$/.test(method))
432        delete ret.ttl;
433
434      if (method !== 'resolveAny')
435        delete ret.type;
436
437      return ret;
438    }
439
440    (async function nextCase() {
441      if (cases.length === 0)
442        return server.close();
443
444      const { method, options } = cases[0];
445
446      validateResults(await dnsPromises[method]('example.org', options));
447
448      dns[method]('example.org', options, common.mustCall((err, res) => {
449        assert.ifError(err);
450        validateResults(res);
451        cases.shift();
452        nextCase();
453      }));
454    })();
455
456  }));
457}
458