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#!/usr/local/bin/python3
print("send 3 non-overlapping ping6 fragments in all possible orders")
# |----|
# |----|
# |----|
import os
from addr import *
from scapy.all import *
permute=[]
permute.append([0,1,2])
permute.append([0,2,1])
permute.append([1,0,2])
permute.append([2,0,1])
permute.append([1,2,0])
permute.append([2,1,0])
pid=os.getpid()
payload=b"ABCDEFGHIJKLMNOP"
for p in permute:
pid += 1
eid=pid & 0xffff
packet=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/ \
ICMPv6EchoRequest(id=eid, data=payload)
frag=[]
fid=pid & 0xffffffff
frag.append(IPv6ExtHdrFragment(nh=58, id=fid,
m=1)/bytes(packet)[40:48])
frag.append(IPv6ExtHdrFragment(nh=58, id=fid,
offset=1, m=1)/bytes(packet)[48:56])
frag.append(IPv6ExtHdrFragment(nh=58, id=fid,
offset=2)/bytes(packet)[56:64])
eth=[]
for i in range(3):
pkt=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/frag[p[i]]
eth.append(Ether(src=LOCAL_MAC, dst=REMOTE_MAC)/pkt)
if os.fork() == 0:
time.sleep(1)
sendp(eth, iface=LOCAL_IF)
os._exit(0)
ans=sniff(iface=LOCAL_IF, timeout=3, filter=
"ip6 and src "+REMOTE_ADDR6+" and dst "+LOCAL_ADDR6+" and icmp6")
for a in ans:
if a and a.type == ETH_P_IPV6 and \
ipv6nh[a.payload.nh] == 'ICMPv6' and \
icmp6types[a.payload.payload.type] == 'Echo Reply':
id=a.payload.payload.id
print("id=%#x" % (id))
if id != eid:
print("WRONG ECHO REPLY ID")
exit(2)
data=a.payload.payload.data
print("payload=%s" % (data))
if data == payload:
break
print("PAYLOAD!=%s" % (payload))
exit(1)
else:
print("NO ECHO REPLY")
exit(2)
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