81 lines
2.0 KiB
JavaScript
81 lines
2.0 KiB
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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TypeResolver = require('./typeresolver');
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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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if(Gamedig.debug) console.log(rinfo.address+':'+rinfo.port+" <--UDP "+buffer.toString('hex'));
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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(
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query.options.address != rinfo.address
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&& query.options.altaddress != rinfo.address
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) continue;
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if(query.options.port_query != 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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udpSocket.on('error', function(e) {
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if(Gamedig.debug) console.log("UDP ERROR: "+e);
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});
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Gamedig = {
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query: function(options,callback) {
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if(callback) options.callback = callback;
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var query;
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try {
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query = TypeResolver.lookup(options.type);
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} catch(e) {
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process.nextTick(function() {
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callback({error:e.message});
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});
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return;
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}
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query.debug = Gamedig.debug;
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query.udpSocket = udpSocket;
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query.type = options.type;
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if(!('port' in query.options) && ('port_query' in query.options)) {
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if(Gamedig.isCommandLine) {
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process.stderr.write(
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"Warning! This game is so old, that we don't know"
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+" what the server's connection port is. We've guessed that"
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+" the query port for "+query.type+" is "+query.options.port_query+"."
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+" If you know the connection port for this type of server, please let"
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+" us know on the GameDig issue tracker, thanks!\n"
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);
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}
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query.options.port = query.options.port_query;
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delete query.options.port_query;
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}
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// copy over options
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for(var i in options) query.options[i] = options[i];
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activeQueries.push(query);
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query.on('finished',function(state) {
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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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module.exports = Gamedig;
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