node-gamedig/protocols/gamespy2.js

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class Gamespy2 extends require('./core') {
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constructor() {
super();
this.sessionId = 1;
this.encoding = 'latin1';
this.byteorder = 'be';
}
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run(state) {
const request = Buffer.from([0xfe,0xfd,0x00,0x00,0x00,0x00,0x01,0xff,0xff,0xff]);
const packets = [];
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this.udpSend(request,
(buffer) => {
if(packets.length && buffer.readUInt8(0) === 0)
buffer = buffer.slice(1);
packets.push(buffer);
},
() => {
const buffer = Buffer.concat(packets);
const reader = this.reader(buffer);
const header = reader.uint(1);
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if(header !== 0) return;
const pingId = reader.uint(4);
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if(pingId !== 1) return;
while(!reader.done()) {
const key = reader.string();
const value = reader.string();
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if(!key) break;
state.raw[key] = value;
}
if('hostname' in state.raw) state.name = state.raw.hostname;
if('mapname' in state.raw) state.map = state.raw.mapname;
if(this.trueTest(state.raw.password)) state.password = true;
if('maxplayers' in state.raw) state.maxplayers = parseInt(state.raw.maxplayers);
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state.players = this.readFieldData(reader);
state.raw.teams = this.readFieldData(reader);
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this.finish(state);
return true;
}
);
}
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readFieldData(reader) {
const count = reader.uint(1);
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// count is unreliable (often it's wrong), so we don't use it.
// read until we hit an empty first field string
if(this.debug) console.log("Reading fields, starting at: "+reader.rest());
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const fields = [];
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while(!reader.done()) {
let field = reader.string();
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if(!field) break;
if(field.charCodeAt(0) <= 2) field = field.substring(1);
fields.push(field);
if(this.debug) console.log("field:"+field);
}
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const units = [];
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outer: while(!reader.done()) {
const unit = {};
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for(let iField = 0; iField < fields.length; iField++) {
let key = fields[iField];
let value = reader.string();
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if(!value && iField === 0) break outer;
if(this.debug) console.log("value:"+value);
if(key === 'player_') key = 'name';
else if(key === 'score_') key = 'score';
else if(key === 'deaths_') key = 'deaths';
else if(key === 'ping_') key = 'ping';
else if(key === 'team_') key = 'team';
else if(key === 'kills_') key = 'kills';
else if(key === 'team_t') key = 'name';
else if(key === 'tickets_t') key = 'tickets';
if(
key === 'score' || key === 'deaths'
|| key === 'ping' || key === 'team'
|| key === 'kills' || key === 'tickets'
) {
if(value === '') continue;
value = parseInt(value);
}
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unit[key] = value;
}
units.push(unit);
}
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return units;
}
}
module.exports = Gamespy2;