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