TCP discard daemon

discardd.py

#!/usr/bin/env python3
import asyncio

class EchoServerProtocol(asyncio.Protocol):
    def connection_made(self, transport):
        self.transport = transport

    def data_received(self, data):
        pass

async def main():
    try:
        loop = asyncio.get_event_loop()

        server = await loop.create_server(
            lambda: EchoServerProtocol(),
            '0.0.0.0', 9999)

        async with server:
            await server.serve_forever()
    except KeyboardInterrupt:
        pass


if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main())