All files / lib dns.js

99.41% Statements 335/337
94.29% Branches 66/70
100% Functions 11/11
99.41% Lines 335/337

Press n or j to go to the next uncovered block, b, p or k for the previous block.

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 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 33815x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 5382x 5382x 9x 9x 5382x 5382x 15x 15x 1x 1x     1x 1x 1x 2x 2x 2x 2x 2x 2x 1x 1x 1x 15x 15x 15x 15x 6075x 6075x 6075x 6075x 6075x 6075x 6075x 6075x 6057x 6057x 6069x 6075x 185x 185x 6054x 5884x 5884x 5884x 5384x 5384x 5384x 5384x 5384x 5384x 5884x 496x 496x 5884x 6057x 6057x 6057x 6075x 14x 14x 1x 14x 13x 13x 14x 14x 6042x 6042x 6054x 656x 1x 1x 655x 655x 655x 656x 656x 5386x 5386x 5386x 5386x 5386x 6075x 6075x 6075x 6075x 6075x 6075x 1x 1x 1x 5385x 6075x 15x 15x 15x 15x 15x 2x 2x 2x 2x 2x 2x 15x 15x 10x 10x 10x 9x 9x 10x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 10x 2x 10x 15x 15x 15x 15x 15x 29x 29x 29x 2x 29x 29x 29x 11x 11x 29x 15x 13507x 13507x 32x 32x 4x 4x 4x 32x 32x 32x 32x 32x 32x 32x 32x 32x 32x 32x 32x 30x 32x 13507x 13507x 13507x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 6x 6x 6x 2x 6x 3x 3x 4x 1x 1x 5x 5x 3x 3x 2x 6x 15x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 90x 35x 35x 35x 90x 90x 15x 15x  
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
 
'use strict';
 
const {
  ArrayPrototypeMap,
  ObjectCreate,
  ObjectDefineProperties,
  ObjectDefineProperty,
  ReflectApply,
} = primordials;
 
const cares = internalBinding('cares_wrap');
const { toASCII } = require('internal/idna');
const { isIP } = require('internal/net');
const { customPromisifyArgs } = require('internal/util');
const errors = require('internal/errors');
const {
  bindDefaultResolver,
  getDefaultResolver,
  setDefaultResolver,
  Resolver,
  validateHints,
  emitInvalidHostnameWarning,
} = require('internal/dns/utils');
const {
  ERR_INVALID_ARG_TYPE,
  ERR_INVALID_ARG_VALUE,
  ERR_MISSING_ARGS,
} = errors.codes;
const {
  validateCallback,
  validatePort,
  validateString,
  validateOneOf,
} = require('internal/validators');
 
const {
  GetAddrInfoReqWrap,
  GetNameInfoReqWrap,
  QueryReqWrap,
} = cares;
 
const dnsException = errors.dnsException;
 
let promises = null; // Lazy loaded
 
function onlookup(err, addresses) {
  if (err) {
    return this.callback(dnsException(err, 'getaddrinfo', this.hostname));
  }
  this.callback(null, addresses[0], this.family || isIP(addresses[0]));
}
 
 
function onlookupall(err, addresses) {
  if (err) {
    return this.callback(dnsException(err, 'getaddrinfo', this.hostname));
  }
 
  const family = this.family;
  for (let i = 0; i < addresses.length; i++) {
    const addr = addresses[i];
    addresses[i] = {
      address: addr,
      family: family || isIP(addr)
    };
  }
 
  this.callback(null, addresses);
}
 
 
// Easy DNS A/AAAA look up
// lookup(hostname, [options,] callback)
function lookup(hostname, options, callback) {
  let hints = 0;
  let family = -1;
  let all = false;
  let verbatim = false;
 
  // Parse arguments
  if (hostname) {
    validateString(hostname, 'hostname');
  }
 
  if (typeof options === 'function') {
    callback = options;
    family = 0;
  } else {
    validateCallback(callback);
 
    if (options !== null && typeof options === 'object') {
      hints = options.hints >>> 0;
      family = options.family >>> 0;
      all = options.all === true;
      verbatim = options.verbatim === true;
 
      validateHints(hints);
    } else {
      family = options >>> 0;
    }
  }
 
  validateOneOf(family, 'family', [0, 4, 6]);
 
  if (!hostname) {
    emitInvalidHostnameWarning(hostname);
    if (all) {
      process.nextTick(callback, null, []);
    } else {
      process.nextTick(callback, null, null, family === 6 ? 6 : 4);
    }
    return {};
  }
 
  const matchedFamily = isIP(hostname);
  if (matchedFamily) {
    if (all) {
      process.nextTick(
        callback, null, [{ address: hostname, family: matchedFamily }]);
    } else {
      process.nextTick(callback, null, hostname, matchedFamily);
    }
    return {};
  }
 
  const req = new GetAddrInfoReqWrap();
  req.callback = callback;
  req.family = family;
  req.hostname = hostname;
  req.oncomplete = all ? onlookupall : onlookup;
 
  const err = cares.getaddrinfo(
    req, toASCII(hostname), family, hints, verbatim
  );
  if (err) {
    process.nextTick(callback, dnsException(err, 'getaddrinfo', hostname));
    return {};
  }
  return req;
}
 
ObjectDefineProperty(lookup, customPromisifyArgs,
                     { value: ['address', 'family'], enumerable: false });
 
 
function onlookupservice(err, hostname, service) {
  if (err)
    return this.callback(dnsException(err, 'getnameinfo', this.hostname));
 
  this.callback(null, hostname, service);
}
 
 
function lookupService(address, port, callback) {
  if (arguments.length !== 3)
    throw new ERR_MISSING_ARGS('address', 'port', 'callback');
 
  if (isIP(address) === 0)
    throw new ERR_INVALID_ARG_VALUE('address', address);
 
  validatePort(port);
 
  validateCallback(callback);
 
  port = +port;
 
  const req = new GetNameInfoReqWrap();
  req.callback = callback;
  req.hostname = address;
  req.port = port;
  req.oncomplete = onlookupservice;
 
  const err = cares.getnameinfo(req, address, port);
  if (err) throw dnsException(err, 'getnameinfo', address);
  return req;
}
 
ObjectDefineProperty(lookupService, customPromisifyArgs,
                     { value: ['hostname', 'service'], enumerable: false });
 
 
function onresolve(err, result, ttls) {
  if (ttls && this.ttl)
    result = ArrayPrototypeMap(
      result, (address, index) => ({ address, ttl: ttls[index] }));
 
  if (err)
    this.callback(dnsException(err, this.bindingName, this.hostname));
  else
    this.callback(null, result);
}
 
function resolver(bindingName) {
  function query(name, /* options, */ callback) {
    let options;
    if (arguments.length > 2) {
      options = callback;
      callback = arguments[2];
    }
 
    validateString(name, 'name');
    validateCallback(callback);
 
    const req = new QueryReqWrap();
    req.bindingName = bindingName;
    req.callback = callback;
    req.hostname = name;
    req.oncomplete = onresolve;
    req.ttl = !!(options && options.ttl);
    const err = this._handle[bindingName](req, toASCII(name));
    if (err) throw dnsException(err, bindingName, name);
    return req;
  }
  ObjectDefineProperty(query, 'name', { value: bindingName });
  return query;
}
 
const resolveMap = ObjectCreate(null);
Resolver.prototype.resolveAny = resolveMap.ANY = resolver('queryAny');
Resolver.prototype.resolve4 = resolveMap.A = resolver('queryA');
Resolver.prototype.resolve6 = resolveMap.AAAA = resolver('queryAaaa');
Resolver.prototype.resolveCaa = resolveMap.CAA = resolver('queryCaa');
Resolver.prototype.resolveCname = resolveMap.CNAME = resolver('queryCname');
Resolver.prototype.resolveMx = resolveMap.MX = resolver('queryMx');
Resolver.prototype.resolveNs = resolveMap.NS = resolver('queryNs');
Resolver.prototype.resolveTxt = resolveMap.TXT = resolver('queryTxt');
Resolver.prototype.resolveSrv = resolveMap.SRV = resolver('querySrv');
Resolver.prototype.resolvePtr = resolveMap.PTR = resolver('queryPtr');
Resolver.prototype.resolveNaptr = resolveMap.NAPTR = resolver('queryNaptr');
Resolver.prototype.resolveSoa = resolveMap.SOA = resolver('querySoa');
Resolver.prototype.reverse = resolver('getHostByAddr');
 
Resolver.prototype.resolve = resolve;
 
function resolve(hostname, rrtype, callback) {
  let resolver;
  if (typeof rrtype === 'string') {
    resolver = resolveMap[rrtype];
  } else if (typeof rrtype === 'function') {
    resolver = resolveMap.A;
    callback = rrtype;
  } else {
    throw new ERR_INVALID_ARG_TYPE('rrtype', 'string', rrtype);
  }
 
  if (typeof resolver === 'function') {
    return ReflectApply(resolver, this, [hostname, callback]);
  }
  throw new ERR_INVALID_ARG_VALUE('rrtype', rrtype);
}
 
function defaultResolverSetServers(servers) {
  const resolver = new Resolver();
 
  resolver.setServers(servers);
  setDefaultResolver(resolver);
  bindDefaultResolver(module.exports, Resolver.prototype);
 
  if (promises !== null)
    bindDefaultResolver(promises, promises.Resolver.prototype);
}
 
module.exports = {
  lookup,
  lookupService,
 
  Resolver,
  setServers: defaultResolverSetServers,
 
  // uv_getaddrinfo flags
  ADDRCONFIG: cares.AI_ADDRCONFIG,
  ALL: cares.AI_ALL,
  V4MAPPED: cares.AI_V4MAPPED,
 
  // ERROR CODES
  NODATA: 'ENODATA',
  FORMERR: 'EFORMERR',
  SERVFAIL: 'ESERVFAIL',
  NOTFOUND: 'ENOTFOUND',
  NOTIMP: 'ENOTIMP',
  REFUSED: 'EREFUSED',
  BADQUERY: 'EBADQUERY',
  BADNAME: 'EBADNAME',
  BADFAMILY: 'EBADFAMILY',
  BADRESP: 'EBADRESP',
  CONNREFUSED: 'ECONNREFUSED',
  TIMEOUT: 'ETIMEOUT',
  EOF: 'EOF',
  FILE: 'EFILE',
  NOMEM: 'ENOMEM',
  DESTRUCTION: 'EDESTRUCTION',
  BADSTR: 'EBADSTR',
  BADFLAGS: 'EBADFLAGS',
  NONAME: 'ENONAME',
  BADHINTS: 'EBADHINTS',
  NOTINITIALIZED: 'ENOTINITIALIZED',
  LOADIPHLPAPI: 'ELOADIPHLPAPI',
  ADDRGETNETWORKPARAMS: 'EADDRGETNETWORKPARAMS',
  CANCELLED: 'ECANCELLED'
};
 
bindDefaultResolver(module.exports, getDefaultResolver());
 
ObjectDefineProperties(module.exports, {
  promises: {
    configurable: true,
    enumerable: true,
    get() {
      if (promises === null) {
        promises = require('internal/dns/promises');
        promises.setServers = defaultResolverSetServers;
      }
      return promises;
    }
  }
});