const Core = require('./core'); class Gamespy2 extends Core { constructor() { super(); this.encoding = 'latin1'; this.byteorder = 'be'; } async run(state) { // Parse info { const body = await this.sendPacket([0xff, 0, 0]); const reader = this.reader(body); while (!reader.done()) { const key = reader.string(); const value = reader.string(); 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); if ('hostport' in state.raw) state.gamePort = parseInt(state.raw.hostport); } // Parse players { const body = await this.sendPacket([0, 0xff, 0]); const reader = this.reader(body); state.players = this.readFieldData(reader); } // Parse teams { const body = await this.sendPacket([0, 0, 0xff]); const reader = this.reader(body); state.raw.teams = this.readFieldData(reader); } // Special case for america's army 1 and 2 // both use gamename = "armygame" if (state.raw.gamename === 'armygame') { const stripColor = (str) => { // uses unreal 2 color codes return str.replace(/\x1b...|[\x00-\x1a]/g,''); }; state.name = stripColor(state.name); state.map = stripColor(state.map); for(const key of Object.keys(state.raw)) { if(typeof state.raw[key] === 'string') { state.raw[key] = stripColor(state.raw[key]); } } for(const player of state.players) { if(!('name' in player)) continue; player.name = stripColor(player.name); } } } async sendPacket(type) { const request = Buffer.concat([ Buffer.from([0xfe,0xfd,0x00]), // gamespy2 Buffer.from([0x00,0x00,0x00,0x01]), // ping ID Buffer.from(type) ]); return await this.udpSend(request, buffer => { const reader = this.reader(buffer); const header = reader.uint(1); if (header !== 0) return; const pingId = reader.uint(4); if (pingId !== 1) return; return reader.rest(); }); } readFieldData(reader) { const zero = reader.uint(1); // always 0 const count = reader.uint(1); // number of rows in this data // some games omit the count byte entirely if it's 0 or at random (like americas army) // Luckily, count should always be <64, and ascii characters will typically be >64, // so we can detect this. if (count > 64) { reader.skip(-1); this.debugLog("Detected missing count byte, rewinding by 1"); } else { this.debugLog("Detected row count: " + count); } this.debugLog(() => "Reading fields, starting at: "+reader.rest()); const fields = []; while(!reader.done()) { let field = reader.string(); if(!field) break; fields.push(field); this.debugLog("field:"+field); } if (!fields.length) return []; const units = []; outer: while(!reader.done()) { const unit = {}; for(let iField = 0; iField < fields.length; iField++) { let key = fields[iField]; let value = reader.string(); if(!value && iField === 0) break outer; this.debugLog("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); } unit[key] = value; } units.push(unit); } return units; } } module.exports = Gamespy2;