node-gamedig/protocols/starmade.js

import Core from './core.js'

export default class starmade extends Core {
  constructor () {
    super()
    this.encoding = 'latin1'
    this.byteorder = 'be'
  }

  async run (state) {
    const b = Buffer.from([0x00, 0x00, 0x00, 0x09, 0x2a, 0xff, 0xff, 0x01, 0x6f, 0x00, 0x00, 0x00, 0x00])

    const payload = await this.withTcp(async socket => {
      return await this.tcpSend(socket, b, buffer => {
        if (buffer.length < 12) return
        const reader = this.reader(buffer)
        const packetLength = reader.uint(4)
        this.logger.debug('Received packet length: ' + packetLength)
        const timestamp = reader.uint(8).toString()
        this.logger.debug('Received timestamp: ' + timestamp)
        if (reader.remaining() < packetLength || reader.remaining() < 5) return

        const checkId = reader.uint(1)
        const packetId = reader.uint(2)
        const commandId = reader.uint(1)
        const type = reader.uint(1)

        this.logger.debug('checkId=' + checkId + ' packetId=' + packetId + ' commandId=' + commandId + ' type=' + type)
        if (checkId !== 0x2a) return

        return reader.rest()
      })
    })

    const reader = this.reader(payload)

    const data = []
    state.raw.data = data

    while (!reader.done()) {
      const mark = reader.uint(1)
      if (mark === 1) {
        // signed int
        data.push(reader.int(4))
      } else if (mark === 3) {
        // float
        data.push(reader.float())
      } else if (mark === 4) {
        // string
        data.push(reader.pascalString(2))
      } else if (mark === 6) {
        // byte
        data.push(reader.uint(1))
      }
    }

    this.logger.debug('Received raw data array', data)

    if (typeof data[0] === 'number') state.raw.infoVersion = data[0]
    if (typeof data[1] === 'string') state.version = data[1]
    if (typeof data[2] === 'string') state.name = data[2]
    if (typeof data[3] === 'string') state.raw.description = data[3]
    if (typeof data[4] === 'number') state.raw.startTime = data[4]
    if (typeof data[5] === 'number') state.numplayers = data[5]
    if (typeof data[6] === 'number') state.maxplayers = data[6]
  }
}