1#!/usr/local/bin/python3
2# send Address Resolution Protocol Request with ethernet multicast sender
3# expect Address Resolution Protocol response and check all fields
4# RFC 826  An Ethernet Address Resolution Protocol
5# Packet Generation
6
7import os
8from addr import *
9from scapy.all import *
10
11arp=ARP(op='who-has', hwsrc="33:33:33:33:33:33", psrc=LOCAL_ADDR,
12    hwdst="ff:ff:ff:ff:ff:ff", pdst=REMOTE_ADDR)
13eth=Ether(src=LOCAL_MAC, dst="ff:ff:ff:ff:ff:ff")/arp
14
15e=srp1(eth, iface=LOCAL_IF, promisc=1, timeout=2)
16
17if e and e.type == ETH_P_ARP:
18	a=e.payload
19	if a.hwtype != ARPHDR_ETHER:
20		print("HWTYPE=%#0.4x != ARPHDR_ETHER" % (a.hwtype))
21		exit(1)
22	if a.ptype != ETH_P_IP:
23		print("PTYPE=%#0.4x != ETH_P_IP" % (a.ptype))
24		exit(1)
25	if a.hwlen != 6:
26		print("HWLEN=%d != 6" % (a.hwlen))
27		exit(1)
28	if a.plen != 4:
29		print("PLEN=%d != 4" % (a.plen))
30		exit(1)
31	if a.op != 2:
32		print("OP=%s != is-at" % (a.op))
33		exit(1)
34	if a.hwsrc != REMOTE_MAC:
35		print("HWLOCAL=%s != REMOTE_MAC" % (a.hwsrc))
36		exit(1)
37	if a.psrc != REMOTE_ADDR:
38		print("PLOCAL=%s != REMOTE_ADDR" % (a.psrc))
39		exit(1)
40	if a.hwdst != "33:33:33:33:33:33":
41		print("HWREMOTE=%s != 33:33:33:33:33:33" % (a.hwdst))
42		exit(1)
43	if a.pdst != LOCAL_ADDR:
44		print("PREMOTE=%s != LOCAL_ADDR" % (a.pdst))
45		exit(1)
46	print("arp reply")
47	exit(0)
48
49print("NO ARP REPLY")
50exit(2)
51