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//
// 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 {
ObjectDefineProperties,
ObjectDefineProperty,
Symbol,
} = 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,
setDefaultResolver,
validateHints,
emitInvalidHostnameWarning,
getDefaultVerbatim,
setDefaultResultOrder,
errorCodes: dnsErrorCodes,
} = require('internal/dns/utils');
const {
Resolver
} = require('internal/dns/callback_resolver');
const {
NODATA,
FORMERR,
SERVFAIL,
NOTFOUND,
NOTIMP,
REFUSED,
BADQUERY,
BADNAME,
BADFAMILY,
BADRESP,
CONNREFUSED,
TIMEOUT,
EOF,
FILE,
NOMEM,
DESTRUCTION,
BADSTR,
BADFLAGS,
NONAME,
BADHINTS,
NOTINITIALIZED,
LOADIPHLPAPI,
ADDRGETNETWORKPARAMS,
CANCELLED,
} = dnsErrorCodes;
const {
ERR_INVALID_ARG_TYPE,
ERR_INVALID_ARG_VALUE,
ERR_MISSING_ARGS,
} = errors.codes;
const {
validateBoolean,
validateFunction,
validateNumber,
validateOneOf,
validatePort,
validateString,
} = require('internal/validators');
const {
GetAddrInfoReqWrap,
GetNameInfoReqWrap,
} = cares;
const kPerfHooksDnsLookupContext = Symbol('kPerfHooksDnsLookupContext');
const kPerfHooksDnsLookupServiceContext = Symbol('kPerfHooksDnsLookupServiceContext');
const {
hasObserver,
startPerf,
stopPerf,
} = require('internal/perf/observe');
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]));
if (this[kPerfHooksDnsLookupContext] && hasObserver('dns')) {
stopPerf(this, kPerfHooksDnsLookupContext, { detail: { addresses } });
}
}
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);
if (this[kPerfHooksDnsLookupContext] && hasObserver('dns')) {
stopPerf(this, kPerfHooksDnsLookupContext, { detail: { addresses } });
}
}
// Easy DNS A/AAAA look up
// lookup(hostname, [options,] callback)
const validFamilies = [0, 4, 6];
function lookup(hostname, options, callback) {
let hints = 0;
let family = 0;
let all = false;
let verbatim = getDefaultVerbatim();
// Parse arguments
if (hostname) {
validateString(hostname, 'hostname');
}
if (typeof options === 'function') {
callback = options;
family = 0;
} else if (typeof options === 'number') {
validateFunction(callback, 'callback');
validateOneOf(options, 'family', validFamilies);
family = options;
} else if (options !== undefined && typeof options !== 'object') {
validateFunction(arguments.length === 2 ? options : callback, 'callback');
throw new ERR_INVALID_ARG_TYPE('options', ['integer', 'object'], options);
} else {
validateFunction(callback, 'callback');
if (options?.hints != null) {
validateNumber(options.hints, 'options.hints');
hints = options.hints >>> 0;
validateHints(hints);
}
if (options?.family != null) {
switch (options.family) {
case 'IPv4':
family = 4;
break;
case 'IPv6':
family = 6;
break;
default:
validateOneOf(options.family, 'options.family', validFamilies);
family = options.family;
break;
}
}
if (options?.all != null) {
validateBoolean(options.all, 'options.all');
all = options.all;
}
if (options?.verbatim != null) {
validateBoolean(options.verbatim, 'options.verbatim');
verbatim = options.verbatim;
}
}
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 {};
}
if (hasObserver('dns')) {
const detail = {
hostname,
family,
hints,
verbatim,
};
startPerf(req, kPerfHooksDnsLookupContext, { type: 'dns', name: 'lookup', detail });
}
return req;
}
ObjectDefineProperty(lookup, customPromisifyArgs,
{ __proto__: null, 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);
if (this[kPerfHooksDnsLookupServiceContext] && hasObserver('dns')) {
stopPerf(this, kPerfHooksDnsLookupServiceContext, { detail: { 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);
validateFunction(callback, '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);
if (hasObserver('dns')) {
startPerf(req, kPerfHooksDnsLookupServiceContext, {
type: 'dns',
name: 'lookupService',
detail: {
host: address,
port,
},
});
}
return req;
}
ObjectDefineProperty(lookupService, customPromisifyArgs,
{ __proto__: null, value: ['hostname', 'service'], enumerable: false });
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,
setDefaultResultOrder,
setServers: defaultResolverSetServers,
// uv_getaddrinfo flags
ADDRCONFIG: cares.AI_ADDRCONFIG,
ALL: cares.AI_ALL,
V4MAPPED: cares.AI_V4MAPPED,
// ERROR CODES
NODATA,
FORMERR,
SERVFAIL,
NOTFOUND,
NOTIMP,
REFUSED,
BADQUERY,
BADNAME,
BADFAMILY,
BADRESP,
CONNREFUSED,
TIMEOUT,
EOF,
FILE,
NOMEM,
DESTRUCTION,
BADSTR,
BADFLAGS,
NONAME,
BADHINTS,
NOTINITIALIZED,
LOADIPHLPAPI,
ADDRGETNETWORKPARAMS,
CANCELLED,
};
bindDefaultResolver(module.exports, Resolver.prototype);
ObjectDefineProperties(module.exports, {
promises: {
__proto__: null,
configurable: true,
enumerable: true,
get() {
if (promises === null) {
promises = require('internal/dns/promises');
}
return promises;
}
}
});
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