mirror of
https://github.com/gamedig/node-gamedig.git
synced 2024-09-07 11:31:28 +02:00
169 lines
4.6 KiB
JavaScript
169 lines
4.6 KiB
JavaScript
var async = require('async');
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module.exports = require('./core').extend({
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init: function() {
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this._super();
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this.sessionId = 1;
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this.encoding = 'latin1';
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this.byteorder = 'be';
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this.noChallenge = false;
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this.useOnlySingleSplit = false;
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},
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run: function(state) {
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var self = this;
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var challenge,packets;
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async.series([
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function(c) {
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if(self.noChallenge) return c();
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self.sendPacket(9,false,false,false,function(buffer) {
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var reader = self.reader(buffer);
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challenge = parseInt(reader.string());
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c();
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});
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},
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function(c) {
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self.sendPacket(0,challenge,new Buffer([0xff,0xff,0xff,0x01]),true,function(b) {
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packets = b;
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c();
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});
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},
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function(c) {
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// iterate over the received packets
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// the first packet will start off with k/v pairs, followed with data fields
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// the following packets will only have data fields
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var data = {};
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for(var iPacket = 0; iPacket < packets.length; iPacket++) {
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var packet = packets[iPacket];
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var reader = self.reader(packet);
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if(self.debug) {
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console.log("+++"+packet.toString('hex'));
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console.log(":::"+packet.toString('ascii'));
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}
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if(iPacket == 0) {
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while(!reader.done()) {
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var key = reader.string();
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if(!key) break;
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var value = reader.string();
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// reread the next line if we hit the weird ut3 bug
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if(value == 'p1073741829') value = reader.string();
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state.raw[key] = value;
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}
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}
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var firstMode = true;
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while(!reader.done()) {
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var mode = reader.string();
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if(mode.charCodeAt(0) <= 2) mode = mode.substring(1);
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if(!mode) continue;
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var offset = 0;
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if(iPacket != 0 && firstMode) offset = reader.uint(1);
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reader.skip(1);
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firstMode = false;
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while(!reader.done()) {
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var item = reader.string();
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if(!item) break;
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if(
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mode == 'player_'
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|| mode == 'score_'
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|| mode == 'ping_'
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|| mode == 'team_'
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|| mode == 'deaths_'
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|| mode == 'pid_'
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) {
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if(state.players.length <= offset)
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state.players.push({});
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}
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if(mode == 'player_') state.players[offset].name = item;
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if(mode == 'score_') state.players[offset].score = parseInt(item);
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if(mode == 'ping_') state.players[offset].ping = parseInt(item);
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if(mode == 'team_') state.players[offset].team = parseInt(item);
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if(mode == 'deaths_') state.players[offset].deaths = parseInt(item);
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if(mode == 'pid_') state.players[offset].pid = item;
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offset++;
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}
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}
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}
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if('hostname' in state.raw) state.name = state.raw.hostname;
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else if('servername' in state.raw) state.name = state.raw.servername;
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if('mapname' in state.raw) state.map = state.raw.mapname;
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if(state.raw.password == '1') state.password = true;
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if('maxplayers' in state.raw) state.maxplayers = parseInt(state.raw.maxplayers);
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self.finish(state);
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}
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]);
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},
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sendPacket: function(type,challenge,payload,assemble,c) {
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var self = this;
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var challengeLength = (this.noChallenge || challenge === false) ? 0 : 4;
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var payloadLength = payload ? payload.length : 0;
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var b = new Buffer(7 + challengeLength + payloadLength);
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b.writeUInt8(0xFE, 0);
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b.writeUInt8(0xFD, 1);
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b.writeUInt8(type, 2);
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b.writeUInt32BE(this.sessionId, 3);
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if(challengeLength) b.writeInt32BE(challenge, 7);
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if(payloadLength) payload.copy(b, 7+challengeLength);
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var numPackets = 0;
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var packets = {};
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this.udpSend(b,function(buffer) {
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var reader = self.reader(buffer);
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var iType = reader.uint(1);
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if(iType != type) return;
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var iSessionId = reader.uint(4);
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if(iSessionId != self.sessionId) return;
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if(!assemble) {
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c(reader.rest());
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return true;
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}
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if(self.useOnlySingleSplit) {
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// has split headers, but they are worthless and only one packet is used
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reader.skip(11);
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c([reader.rest()]);
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return true;
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}
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reader.skip(9); // filler data -- usually set to 'splitnum\0'
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var id = reader.uint(1);
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var last = (id & 0x80);
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id = id & 0x7f;
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if(last) numPackets = id+1;
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reader.skip(1); // "another 'packet number' byte, but isn't understood."
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packets[id] = reader.rest();
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if(self.debug) {
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console.log("Received packet #"+id);
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if(last) console.log("(last)");
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}
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if(!numPackets || Object.keys(packets).length != numPackets) return;
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// assemble the parts
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var list = [];
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for(var i = 0; i < numPackets; i++) {
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if(!(i in packets)) {
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self.fatal('Missing packet #'+i);
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return true;
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}
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list.push(packets[i]);
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}
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c(list);
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return true;
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});
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}
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});
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