128 lines
2.9 KiB
JavaScript
128 lines
2.9 KiB
JavaScript
var dns = require('dns'),
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net = require('net'),
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varint = require('varint');
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function varIntBuffer(num) {
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return new Buffer(varint.encode(num));
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}
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module.exports = require('./protocols/core').extend({
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init: function() {
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this._super();
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this.pretty = 'Minecraft';
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this.options.port = 25565;
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},
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parseDns: function(host,c) {
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var self = this;
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var _super = this._super;
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function fallback(h) { _super.call(self,h,c); }
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dns.resolve('_minecraft._tcp.'+host, 'SRV', function(err,addresses) {
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if(err) return fallback(host);
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if(addresses.length >= 1) {
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var line = addresses[0];
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self.options.port = line.port;
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var srvhost = line.name;
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if(srvhost.match(/\d+\.\d+\.\d+\.\d+/)) {
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self.options.address = srvhost;
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c();
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} else {
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// resolve yet again
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fallback(srvhost);
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}
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return;
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}
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return fallback(host);
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});
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},
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reset: function() {
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this._super();
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if(this.socket) {
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this.socket.destroy();
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delete this.socket;
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}
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},
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run: function(state) {
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var self = this;
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var socket = this.socket = net.connect(
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this.options.port,
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this.options.address,
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function() {
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var portBuf = new Buffer(2);
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portBuf.writeUInt16BE(self.options.port,0);
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var addressBuf = new Buffer(self.options.address,'utf8');
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var bufs = [
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varIntBuffer(4),
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varIntBuffer(addressBuf.length),
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addressBuf,
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portBuf,
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varIntBuffer(1)
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];
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self.sendPacket(0,Buffer.concat(bufs));
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self.sendPacket(0);
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});
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socket.setTimeout(10000);
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socket.setNoDelay(true);
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var received = new Buffer(0);
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var expectedBytes = 0;
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socket.on('data', function(data) {
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received = Buffer.concat([received,data]);
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if(expectedBytes) {
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if(received.length >= expectedBytes) {
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self.allReceived(received,state);
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}
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} else if(received.length > 10) {
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expectedBytes = varint.decode(received);
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received = received.slice(varint.decode.bytesRead);
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}
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});
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},
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sendPacket: function(id,data) {
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if(!data) data = new Buffer(0);
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var idBuffer = varIntBuffer(id);
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var out = Buffer.concat([
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varIntBuffer(data.length+idBuffer.length),
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idBuffer,
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data
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]);
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this.socket.write(out);
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},
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allReceived: function(received,state) {
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var packetId = varint.decode(received);
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received = received.slice(varint.decode.bytesRead);
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var strLen = varint.decode(received);
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received = received.slice(varint.decode.bytesRead);
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var str = received.toString('utf8');
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var json;
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try {
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json = JSON.parse(str);
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delete json.favicon;
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} catch(e) {
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return this.fatal('Invalid JSON');
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}
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state.raw.version = json.version.name;
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state.maxplayers = json.players.max;
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state.raw.description = json.description.text;
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for(var i = 0; i < json.players.sample.length; i++) {
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state.players.push({
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id: json.players.sample[i].id,
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name: json.players.sample[i].name
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});
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}
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while(state.players.length < json.players.online) {
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state.players.push({});
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}
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this.finish(state);
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}
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});
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