Update arp operation code

Just added the operation code for arp-reply. The packages that were been sent were arp requests. It worked, but didn't match the comments and variable name.

Author: filipe1417

scapy/arp-spoofer/arp_spoof.py

@@ -79,7 +79,7 @@ def restore(target_ip, host_ip, verbose=True):
     # get the real MAC address of spoofed (gateway, i.e router)
     host_mac = get_mac(host_ip)
     # crafting the restoring packet
-    arp_response = ARP(pdst=target_ip, hwdst=target_mac, psrc=host_ip, hwsrc=host_mac)
+    arp_response = ARP(pdst=target_ip, hwdst=target_mac, psrc=host_ip, hwsrc=host_mac, op="is-at")
     # sending the restoring packet
     # to restore the network to its normal process
     # we send each reply seven times for a good measure (count=7)
@@ -108,4 +108,4 @@ def restore(target_ip, host_ip, verbose=True):
     except KeyboardInterrupt:
         print("[!] Detected CTRL+C ! restoring the network, please wait...")
         restore(target, host)
-        restore(host, target)
+        restore(host, target)