bta-proxy/bta_proxy/__main__.py

import asyncio
import socket
from asyncio.streams import StreamReader, StreamWriter

from .debug import debug_client, debug_server

MAX_SIZE = 0x400000

async def handle_server(writer: StreamWriter, server: socket.socket, fp):
    try:
        while (packet := await loop.sock_recv(server, MAX_SIZE)):
            try:
                debug_server(packet, fp)
            except Exception as e:
                print(f'[S] error: {e}')
            writer.write(packet)
            await writer.drain()
    except Exception as e:
        print(f'handle_server(): {e}')

async def handle_client(reader: StreamReader, writer: StreamWriter):
    print(reader, writer)
    try:
        server = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
        server.connect(('201:4f8c:4ea:0:71ec:6d7:6f1b:a4f9', 25565))
        server.setblocking(False)

        with open("packets.txt", "w") as fp:
            loop.create_task(handle_server(writer, server, fp))

            while (packet := await reader.read(MAX_SIZE)):
                try:
                    debug_client(packet, fp)
                except Exception as e:
                    print(f'[C] error: {e}')
                await loop.sock_sendall(server, packet)
    except Exception as e:
        print(f'handle_client(): {e}')


loop = asyncio.get_event_loop()
def main():
    loop.create_task(asyncio.start_server(handle_client, 'localhost', 25565))
    loop.run_forever()

if __name__ == '__main__':
    main()