import scapy.all as scapy

def get_mac(ip):
   arp_request = scapy.ARP(pdst=ip)
   broadcast = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
   arp_request_broadcast =  broadcast/arp_request
   answered_list = scapy.srp(arp_request_broadcast, timeout=1, verbose=False)[0]
   return answered_list[0][1].hwsrc

def sniff(interface):
        scapy.sniff(iface=interface, store=False, prn=proccess_sniffed_packet)

def proccess_sniffed_packet(packet):
        if packet.haslayer(scapy.ARP) and packet[scapy.ARP].op == 2:
                try:
                        real_mac = get_mac(packet[scapy.ARP].psrc)
                        response_mac = packet[scapy.ARP].hwsrc

                        if real_mac != response_mac:
                                print("ARP Spoofing Detected.")
                except IndexError:
                        pass


sniff("wlan0")