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// Credits to M4GNV5 for this library
import net from 'net'
class Rcon {
socket: net.Socket
timeout: number
nextId: number
connected: boolean
authed: boolean
debug: boolean
ip: string
port: number
packages: { [key: number]: (type: number, response: string) => void }
constructor (ip: string, port: number, debug: boolean) {
this.ip = ip
this.port = port
this.debug = debug
this.timeout = 5000
this.nextId = 0
this.connected = false
this.authed = false
this.packages = []
this.socket = net.connect(port, ip, () => {
this.connected = true
console.log('[INFO] Authenticated with ' + ip + ':' + port)
})
this.socket.on('data', (data: Buffer) => {
const id = data.readInt32LE(4)
const type = data.readInt32LE(8)
const response = data.toString('ascii', 12, data.length - 2)
if (this.packages[id]) {
this.packages[id](type, response)
} else {
console.log('Unexpected rcon response', id, type, response)
}
}).on('end', () => {
if (debug) {
console.log('[DEBUG] Rcon closed!')
}
})
}
public close () {
this.connected = false
this.socket.end()
}
public async auth (password: string): Promise<void> {
if (this.authed) { throw new Error('Already authed') }
if (this.connected){
try {
await this.sendPackage(3, password)
} catch (e) {
console.log('[ERROR] Could not send password to Rcon server!')
if (this.debug) console.error(e)
}
} else {
return new Promise((resolve, reject) => {
this.socket.on('connect', async () => {
try {
await this.sendPackage(3, password)
resolve()
} catch (e) {
console.log('[ERROR] Could not send password to Rcon server!')
if (this.debug) console.error(e)
reject(e)
}
})
})
}
}
public command (cmd: string): Promise<string> {
return this.sendPackage(2, cmd)
}
public sendPackage (type: number, payload: string): Promise<string> {
const id = this.nextId
this.nextId++
if (!this.connected) { throw new Error('Cannot send package while not connected') }
const length = 14 + payload.length
const buff = Buffer.alloc(length)
buff.writeInt32LE(length - 4, 0)
buff.writeInt32LE(id, 4)
buff.writeInt32LE(type, 8)
buff.write(payload, 12)
buff.writeInt8(0, length - 2)
buff.writeInt8(0, length - 1)
this.socket.write(buff)
return new Promise((resolve, reject) => {
const timeout = setTimeout(() => {
delete this.packages[id]
return reject('Server sent no request in ' + this.timeout / 1000 + ' seconds')
}, this.timeout)
this.packages[id] = (type: number, response: string) => {
clearTimeout(timeout)
const err = type >= 0 ? false : 'Server sent package code ' + type
if (this.debug) {
console.log('[DEBUG] Received response: ' + response)
}
if (err) return reject(err)
return resolve(response)
}
})
}
}
export default Rcon
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