mirror of
https://github.com/gamedig/node-gamedig.git
synced 2024-09-07 03:21:29 +02:00
210 lines
7.7 KiB
JavaScript
210 lines
7.7 KiB
JavaScript
const async = require('async');
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class Gamespy3 extends require('./core') {
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constructor() {
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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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this.isJc2mp = false;
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}
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run(state) {
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let challenge,packets;
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async.series([
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(c) => {
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if(this.noChallenge) return c();
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this.sendPacket(9,false,false,false,(buffer) => {
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const reader = this.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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(c) => {
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let requestPayload;
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if(this.isJc2mp) {
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// they completely alter the protocol. because why not.
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requestPayload = Buffer.from([0xff,0xff,0xff,0x02]);
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} else {
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requestPayload = Buffer.from([0xff,0xff,0xff,0x01]);
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}
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this.sendPacket(0,challenge,requestPayload,true,(b) => {
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packets = b;
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c();
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});
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},
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(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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state.raw.playerTeamInfo = {};
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for(let iPacket = 0; iPacket < packets.length; iPacket++) {
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const packet = packets[iPacket];
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const reader = this.reader(packet);
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if(this.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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// Parse raw server key/values
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if(iPacket === 0) {
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while(!reader.done()) {
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const key = reader.string();
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if(!key) break;
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let 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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// Parse player, team, item array state
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if(this.isJc2mp) {
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state.raw.numPlayers2 = reader.uint(2);
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while(!reader.done()) {
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const player = {};
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player.name = reader.string();
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player.steamid = reader.string();
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player.ping = reader.uint(2);
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state.players.push(player);
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}
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} else {
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let firstMode = true;
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while(!reader.done()) {
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let 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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let 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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const modeSplit = mode.split('_');
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const modeName = modeSplit[0];
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const modeType = modeSplit.length > 1 ? modeSplit[1] : 'no_';
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if(!(modeType in state.raw.playerTeamInfo)) {
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state.raw.playerTeamInfo[modeType] = [];
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}
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const store = state.raw.playerTeamInfo[modeType];
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while(!reader.done()) {
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const item = reader.string();
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if(!item) break;
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while(store.length <= offset) { store.push({}); }
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store[offset][modeName] = item;
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offset++;
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}
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}
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}
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}
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c();
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},
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(c) => {
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// Turn all that raw state into something useful
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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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if('' in state.raw.playerTeamInfo) {
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for (const playerInfo of state.raw.playerTeamInfo['']) {
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const player = {};
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for(const from of Object.keys(playerInfo)) {
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let key = from;
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let value = playerInfo[from];
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if(key === 'player') key = 'name';
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if(key === 'score' || key === 'ping' || key === 'team' || key === 'deaths' || key === 'pid') value = parseInt(value);
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player[key] = value;
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}
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state.players.push(player);
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}
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}
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this.finish(state);
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}
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]);
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}
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sendPacket(type,challenge,payload,assemble,c) {
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const challengeLength = (this.noChallenge || challenge === false) ? 0 : 4;
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const payloadLength = payload ? payload.length : 0;
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const b = Buffer.alloc(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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let numPackets = 0;
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const packets = {};
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this.udpSend(b,(buffer) => {
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const reader = this.reader(buffer);
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const iType = reader.uint(1);
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if(iType !== type) return;
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const iSessionId = reader.uint(4);
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if(iSessionId !== this.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(this.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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let id = reader.uint(1);
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const 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(this.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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const list = [];
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for(let i = 0; i < numPackets; i++) {
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if(!(i in packets)) {
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this.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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module.exports = Gamespy3;
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