receive.py

#!/usr/bin/env python3
import sys
import struct
import os

from scapy.all import sniff, sendp, hexdump, get_if_list, get_if_hwaddr
from scapy.all import Packet, IPOption
from scapy.all import ShortField, IntField, LongField, BitField, FieldListField, FieldLenField
from scapy.all import IP, TCP, UDP, Raw
from scapy.layers.inet import _IPOption_HDR


def get_if():
    ifs = get_if_list()
    iface = None
    for i in get_if_list():
        if "eth0" in i:
            iface = i
            break
    if not iface:
        print("Cannot find eth0 interface")
        exit(1)
    return iface


def handle_pkt(pkt):
    if UDP in pkt and pkt[UDP].dport == 8002:
        print("got a packet")
        pkt.show2()
        sys.stdout.flush()


def main():
    iface = get_if()
    print("sniffing on %s" % iface)
    sys.stdout.flush()
    sniff(iface=iface,
          prn=lambda x: handle_pkt(x))


if __name__ == '__main__':
    main()