python-netfilterqueue/gevent proof of concept

gistfile1.txt

#!/usr/bin/env python
from gevent.server import StreamServer
from netfilterqueue import NetfilterQueue
from gevent import monkey; monkey.patch_socket()

def print_and_accept(pkt):
    print(pkt)
    pkt.accept()

def echo(socket, address):
    print('New connection from %s:%s' % address)
    socket.sendall(b'Welcome to the echo server! Type quit to exit.\r\n')
    # using a makefile because we want to use readline()
    rfileobj = socket.makefile(mode='rb')
    while True:
        line = rfileobj.readline()
        if not line:
            print("client disconnected")
            break
        if line.strip().lower() == b'quit':
            print("client quit")
            break
        socket.sendall(line)
        print("echoed %r" % line)
    rfileobj.close()

if __name__ == '__main__':
    server = StreamServer(('127.0.0.1', 16000), echo)
    print('Starting echo server on port 16000')
    server.start()

    nfqueue = NetfilterQueue()
    nfqueue.bind(1, print_and_accept)
    try:
        nfqueue.run2()
    except KeyboardInterrupt:
        print('')

    nfqueue.unbind()