60 lines
1.1 KiB
JavaScript
60 lines
1.1 KiB
JavaScript
/*!
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* dns.js - dns backend for bcoin
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* Copyright (c) 2014-2016, Christopher Jeffrey (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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'use strict';
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var dns = require('dns');
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var options = {
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family: 4,
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hints: dns.ADDRCONFIG | dns.V4MAPPED,
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all: true
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};
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exports.resolve = function resolve(host, proxy) {
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return new Promise(function(resolve, reject) {
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dns.resolve(host, 'A', function(err, result) {
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if (err) {
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reject(err);
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return;
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}
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if (result.length === 0) {
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reject(new Error('No DNS results.'));
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return;
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}
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resolve(result);
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});
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});
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};
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exports.lookup = function lookup(host, proxy) {
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return new Promise(function(resolve, reject) {
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var addrs = [];
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var i, addr;
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dns.lookup(host, options, function(err, result) {
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if (err) {
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reject(err);
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return;
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}
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if (result.length === 0) {
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reject(new Error('No DNS results.'));
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return;
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}
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for (i = 0; i < result.length; i++) {
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addr = result[i];
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addrs.push(addr.address);
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}
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resolve(addrs);
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});
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});
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};
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