import Core from './core.js' export default class battlefield extends Core { constructor () { super() this.encoding = 'latin1' } async run (state) { await this.withTcp(async socket => { { const data = await this.query(socket, ['serverInfo']) state.name = data.shift() state.numplayers = parseInt(data.shift()) state.maxplayers = parseInt(data.shift()) state.raw.gametype = data.shift() state.map = data.shift() state.raw.roundsplayed = parseInt(data.shift()) state.raw.roundstotal = parseInt(data.shift()) const teamCount = data.shift() state.raw.teams = [] for (let i = 0; i < teamCount; i++) { const tickets = parseFloat(data.shift()) state.raw.teams.push({ tickets }) } state.raw.targetscore = parseInt(data.shift()) state.raw.status = data.shift() // Seems like the fields end at random places beyond this point // depending on the server version if (data.length) state.raw.ranked = (data.shift() === 'true') if (data.length) state.raw.punkbuster = (data.shift() === 'true') if (data.length) state.password = (data.shift() === 'true') if (data.length) state.raw.uptime = parseInt(data.shift()) if (data.length) state.raw.roundtime = parseInt(data.shift()) const isBadCompany2 = data[0] === 'BC2' if (isBadCompany2) { if (data.length) data.shift() if (data.length) data.shift() } if (data.length) { state.raw.ip = data.shift() const split = state.raw.ip.split(':') state.gameHost = split[0] state.gamePort = split[1] } else { // best guess if the server doesn't tell us what the server port is // these are just the default game ports for different default query ports if (this.options.port === 48888) state.gamePort = 7673 if (this.options.port === 22000) state.gamePort = 25200 } if (data.length) state.raw.punkbusterversion = data.shift() if (data.length) state.raw.joinqueue = (data.shift() === 'true') if (data.length) state.raw.region = data.shift() if (data.length) state.raw.pingsite = data.shift() if (data.length) state.raw.country = data.shift() if (data.length) state.raw.quickmatch = (data.shift() === 'true') } { const data = await this.query(socket, ['version']) data.shift() state.raw.version = data.shift() } { const data = await this.query(socket, ['listPlayers', 'all']) const fieldCount = parseInt(data.shift()) const fields = [] for (let i = 0; i < fieldCount; i++) { fields.push(data.shift()) } const numplayers = data.shift() for (let i = 0; i < numplayers; i++) { const player = {} for (let key of fields) { let value = data.shift() if (key === 'teamId') key = 'team' else if (key === 'squadId') key = 'squad' if ( key === 'kills' || key === 'deaths' || key === 'score' || key === 'rank' || key === 'team' || key === 'squad' || key === 'ping' || key === 'type' ) { value = parseInt(value) } player[key] = value } state.players.push(player) } } }) } async query (socket, params) { const outPacket = this.buildPacket(params) return await this.tcpSend(socket, outPacket, (data) => { const decoded = this.decodePacket(data) if (decoded) { this.logger.debug(decoded) if (decoded.shift() !== 'OK') throw new Error('Missing OK') return decoded } }) } buildPacket (params) { const paramBuffers = [] for (const param of params) { paramBuffers.push(Buffer.from(param, 'utf8')) } let totalLength = 12 for (const paramBuffer of paramBuffers) { totalLength += paramBuffer.length + 1 + 4 } const b = Buffer.alloc(totalLength) b.writeUInt32LE(0, 0) b.writeUInt32LE(totalLength, 4) b.writeUInt32LE(params.length, 8) let offset = 12 for (const paramBuffer of paramBuffers) { b.writeUInt32LE(paramBuffer.length, offset); offset += 4 paramBuffer.copy(b, offset); offset += paramBuffer.length b.writeUInt8(0, offset); offset += 1 } return b } decodePacket (buffer) { if (buffer.length < 8) return false const reader = this.reader(buffer) reader.uint(4) // header const totalLength = reader.uint(4) if (buffer.length < totalLength) return false this.logger.debug('Expected ' + totalLength + ' bytes, have ' + buffer.length) const paramCount = reader.uint(4) const params = [] for (let i = 0; i < paramCount; i++) { params.push(reader.pascalString(4)) reader.uint(1) // strNull } return params } }