46 lines
1000 B
JavaScript
46 lines
1000 B
JavaScript
var dgram = require('dgram'),
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EventEmitter = require('events').EventEmitter,
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util = require('util'),
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dns = require('dns');
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var activeQueries = [];
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var udpSocket = dgram.createSocket('udp4');
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udpSocket.unref();
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udpSocket.bind(21943);
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udpSocket.on('message', function(buffer, rinfo) {
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for(var i = 0; i < activeQueries.length; i++) {
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var query = activeQueries[i];
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if(query.address != rinfo.address) continue;
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if(query.port != rinfo.port) continue;
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query._udpResponse(buffer);
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break;
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}
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});
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module.exports = {
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query: function(options) {
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var type = (options.type || '').replace(/\W/g,'');
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var protocol = require('./protocols/'+type);
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var query = new protocol();
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query.udpSocket = udpSocket;
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query.type = type;
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query.options = options;
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activeQueries.push(query);
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query.on('finished', function() {
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var i = activeQueries.indexOf(query);
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if(i >= 0) activeQueries.splice(i, 1);
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});
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process.nextTick(function() {
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query.start();
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});
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return query;
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}
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};
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