1#!/usr/local/bin/python2.7
2# send 6 non-overlapping ping6 fragments in 75 seconds, timeout is 60
3
4# |----|
5#      |----|
6#           |----|
7#                |----|
8#                     |----|      <--- timeout
9#                          |----|
10
11import os
12from addr import *
13from scapy.all import *
14
15pid=os.getpid()
16payload="ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcd"
17packet=IPv6(src=SRC_OUT6, dst=DST_IN6)/ICMPv6EchoRequest(id=pid, data=payload)
18frag=[]
19frag.append(IPv6ExtHdrFragment(nh=58, id=pid, m=1)/str(packet)[40:48])
20frag.append(IPv6ExtHdrFragment(nh=58, id=pid, offset=1, m=1)/str(packet)[48:56])
21frag.append(IPv6ExtHdrFragment(nh=58, id=pid, offset=2, m=1)/str(packet)[56:64])
22frag.append(IPv6ExtHdrFragment(nh=58, id=pid, offset=3, m=1)/str(packet)[64:72])
23frag.append(IPv6ExtHdrFragment(nh=58, id=pid, offset=4, m=1)/str(packet)[72:80])
24frag.append(IPv6ExtHdrFragment(nh=58, id=pid, offset=5)/str(packet)[80:88])
25eth=[]
26for f in frag:
27	pkt=IPv6(src=SRC_OUT6, dst=DST_IN6)/f
28	eth.append(Ether(src=SRC_MAC, dst=DST_MAC)/pkt)
29
30if os.fork() == 0:
31	time.sleep(1)
32	for e in eth:
33		sendp(e, iface=SRC_IF)
34		time.sleep(15)
35	os._exit(0)
36
37ans=sniff(iface=SRC_IF, timeout=90, filter=
38    "ip6 and src "+DST_IN6+" and dst "+SRC_OUT6+" and icmp6")
39for a in ans:
40	if a and a.type == ETH_P_IPV6 and \
41	    ipv6nh[a.payload.nh] == 'ICMPv6' and \
42	    icmp6types[a.payload.payload.type] == 'Echo Reply':
43		id=a.payload.payload.id
44		print "id=%#x" % (id)
45		if id != pid:
46			print "WRONG ECHO REPLY ID"
47			exit(2)
48		data=a.payload.payload.data
49		print "payload=%s" % (data)
50		if data == payload:
51			print "ECHO REPLY"
52			exit(1)
53		print "PAYLOAD!=%s" % (payload)
54		exit(2)
55print "no echo reply"
56exit(0)
57