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dnsserver.js
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dnsserver.js
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/*
* dnsserver.js
*
* Copyright 2013 Jon Cross <joncross.cooljc@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*
*/
var dns = require('native-dns');
var util = require('util');
var server = dns.createServer();
var record_db = null;
var onRelay = function (domain, response) {
var question = dns.Question({
name: domain,
type: 'A',
});
var req = dns.Request({
question: question,
server: { address: '8.8.8.8', port: 53, type: 'udp' },
timeout: 1000,
});
req.on('message', function (err, answer) {
var entries = [];
answer.answer.forEach(function (a) {
response.answer.push(dns.A(a));
});
response.send();
});
req.send();
};
var onRequest = function (request, response) {
var domain = request.question[0].name;
record_db.lookupRecords(response, dns, domain, onRelay);
};
server.on('request', onRequest);
server.on('error', function (err, buff, req, res) {
console.log(err.stack);
});
function start(db) {
record_db = db;
console.log('Listening on '+53);
server.serve(53);
};
exports.start = start;