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#!/usr/local/bin/python3
# send Address Resolution Protocol Announcement
# expect Address Resolution Protocol response and check all fields
# RFC 5227 IPv4 Address Conflict Detection
# 2.3. Announcing an Address
import os
from addr import *
from scapy.all import *
arp=ARP(op='who-has', hwsrc=LOCAL_MAC, psrc=REMOTE_ADDR,
hwdst="00:00:00:00:00:00", pdst=REMOTE_ADDR)
eth=Ether(src=LOCAL_MAC, dst="ff:ff:ff:ff:ff:ff")/arp
e=srp1(eth, iface=LOCAL_IF, timeout=2)
if e and e.type == ETH_P_ARP:
a=e.payload
if a.hwtype != ARPHDR_ETHER:
print("HWTYPE=%#0.4x != ARPHDR_ETHER" % (a.hwtype))
exit(1)
if a.ptype != ETH_P_IP:
print("PTYPE=%#0.4x != ETH_P_IP" % (a.ptype))
exit(1)
if a.hwlen != 6:
print("HWLEN=%d != 6" % (a.hwlen))
exit(1)
if a.plen != 4:
print("PLEN=%d != 4" % (a.plen))
exit(1)
# XXX we should get a request from the defender, rfc5227 2.4 (3)
if a.op != 2:
print("OP=%s != is-at" % (a.op))
exit(1)
if a.hwsrc != REMOTE_MAC:
print("HWLOCAL=%s != REMOTE_MAC" % (a.hwsrc))
exit(1)
if a.psrc != REMOTE_ADDR:
print("PLOCAL=%s != REMOTE_ADDR" % (a.psrc))
exit(1)
if a.hwdst != LOCAL_MAC:
print("HWREMOTE=%s != LOCAL_MAC" % (a.hwdst))
exit(1)
if a.pdst != REMOTE_ADDR:
print("PREMOTE=%s != REMOTE_ADDR" % (a.pdst))
exit(1)
print("arp reply")
exit(0)
print("NO ARP REPLY")
exit(2)
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