1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
#!/usr/local/bin/python3
print("6 non-overlapping ping6 fragments in 75 seconds, timeout is 60")
# |----|
# |----|
# |----|
# |----|
# |----| <--- timeout
# |----|
import os
from addr import *
from scapy.all import *
pid=os.getpid()
eid=pid & 0xffff
payload=b"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcd"
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, m=1)/bytes(packet)[56:64])
frag.append(IPv6ExtHdrFragment(nh=58, id=fid,
offset=3, m=1)/bytes(packet)[64:72])
frag.append(IPv6ExtHdrFragment(nh=58, id=fid,
offset=4, m=1)/bytes(packet)[72:80])
frag.append(IPv6ExtHdrFragment(nh=58, id=fid,
offset=5)/bytes(packet)[80:88])
eth=[]
for f in frag:
pkt=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/f
eth.append(Ether(src=LOCAL_MAC, dst=REMOTE_MAC)/pkt)
if os.fork() == 0:
time.sleep(1)
for e in eth:
sendp(e, iface=LOCAL_IF)
time.sleep(15)
os._exit(0)
ans=sniff(iface=LOCAL_IF, timeout=90, 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:
print("ECHO REPLY")
exit(1)
print("PAYLOAD!=%s" % (payload))
exit(2)
print("no echo reply")
exit(0)
|
