1*ac29c8e0Sbluhm#!/usr/local/bin/python3 2a13597faSbluhm# send Address Resolution Protocol Probe 3a13597faSbluhm# expect Address Resolution Protocol response and check all fields 4a13597faSbluhm# RFC 5227 IPv4 Address Conflict Detection 5a13597faSbluhm# 2.1.1. Probe Details 6a13597faSbluhm 7a13597faSbluhm 8a13597faSbluhmimport os 9a13597faSbluhmfrom addr import * 10a13597faSbluhmfrom scapy.all import * 11a13597faSbluhm 12a13597faSbluhmarp=ARP(op='who-has', hwsrc=LOCAL_MAC, psrc="0.0.0.0", 13a13597faSbluhm hwdst="00:00:00:00:00:00", pdst=REMOTE_ADDR) 14a13597faSbluhmeth=Ether(src=LOCAL_MAC, dst="ff:ff:ff:ff:ff:ff")/arp 15a13597faSbluhm 16a13597faSbluhme=srp1(eth, iface=LOCAL_IF, timeout=2) 17a13597faSbluhm 18a13597faSbluhmif e and e.type == ETH_P_ARP: 19a13597faSbluhm a=e.payload 20a13597faSbluhm if a.hwtype != ARPHDR_ETHER: 21*ac29c8e0Sbluhm print("HWTYPE=%#0.4x != ARPHDR_ETHER" % (a.hwtype)) 22a13597faSbluhm exit(1) 23a13597faSbluhm if a.ptype != ETH_P_IP: 24*ac29c8e0Sbluhm print("PTYPE=%#0.4x != ETH_P_IP" % (a.ptype)) 25a13597faSbluhm exit(1) 26a13597faSbluhm if a.hwlen != 6: 27*ac29c8e0Sbluhm print("HWLEN=%d != 6" % (a.hwlen)) 28a13597faSbluhm exit(1) 29a13597faSbluhm if a.plen != 4: 30*ac29c8e0Sbluhm print("PLEN=%d != 4" % (a.plen)) 31a13597faSbluhm exit(1) 32a13597faSbluhm if a.op != 2: 33*ac29c8e0Sbluhm print("OP=%s != is-at" % (a.op)) 34a13597faSbluhm exit(1) 35a13597faSbluhm if a.hwsrc != REMOTE_MAC: 36*ac29c8e0Sbluhm print("HWLOCAL=%s != REMOTE_MAC" % (a.hwsrc)) 37a13597faSbluhm exit(1) 38a13597faSbluhm if a.psrc != REMOTE_ADDR: 39*ac29c8e0Sbluhm print("PLOCAL=%s != REMOTE_ADDR" % (a.psrc)) 40a13597faSbluhm exit(1) 41a13597faSbluhm if a.hwdst != LOCAL_MAC: 42*ac29c8e0Sbluhm print("HWREMOTE=%s != LOCAL_MAC" % (a.hwdst)) 43a13597faSbluhm exit(1) 44a13597faSbluhm if a.pdst != "0.0.0.0": 45*ac29c8e0Sbluhm print("PREMOTE=%s != 0.0.0.0" % (a.pdst)) 46a13597faSbluhm exit(1) 47*ac29c8e0Sbluhm print("arp reply") 48a13597faSbluhm exit(0) 49a13597faSbluhm 50*ac29c8e0Sbluhmprint("NO ARP REPLY") 51a13597faSbluhmexit(2) 52