from typing import List

import netfilterqueue
from netfilterqueue import NetfilterQueue


packet_storage: List[netfilterqueue.Packet] = []


def print_packets():
    for packet in packet_storage:
        print(packet)


def handle_packet(packet: netfilterqueue.Packet):
    packet.retain()
    packet.accept()
    packet_storage.append(packet)
    print_packets()


q = NetfilterQueue()
q.bind(11, handle_packet)
q.run()

    def __str__(self):
        cdef iphdr *hdr = <iphdr*>self.payload
        protocol = PROTOCOLS.get(hdr.protocol, "Unknown protocol")
        return "%s packet, %s bytes" % (protocol, self.payload_len)