Sniff_and_Spoof.py

#!/usr/bin/env python3
from scapy.all import *

# Task 1.4 ----------------------------------------------
# Lookup the code in the lecture


def spoof_pkt(pkt):
    # sniff and print out icmp echo request packet
    if ICMP in pkt and pkt[ICMP.type == 8:
        print("Original Packet...........")
        print("Source IP : ", pkt[IP].src)
        print("Destination IP :", pkt[IP].dst)

        # spoof an icmp echo reply packet   
        # swap srcip and dstip
        ip = IP(src=pkt[IP].dst, dst=pkt[IP].src, ihl=pkt[IP].ihl)
        icmp = ICMP(type=0, id=pkt[ICMP].id, seq=pkt[ICMP].seq)
        data = pkt[Raw].load
        newpkt = ip/icmp/data

        print("Spoofed Packet..............")
        print("Source IP : "' newpkt[IP}.src)
        print("Destination IP :", newpkt[IP].dst)
  
        send(newpkt, verbose=0)

#filter = 'icmp and host 1.2.3.4'
#filter = 'icmp and host 10.9.0.99'
#filter = 'icmp and host 8.8.8.8'
#filter = 'icmp and host host 8.8.4.4'
#print("filter:{}\n".format(filter))

pkt = sniff(iface = 'br-6d54bbcb5aeb', filter=filter, prn=spoof_pkt)