1#!/usr/local/bin/python3
2# send a ping6 packet with routing header type 0
3# try to source route
4# hide the routing header behind a fragment header to avoid header scan
5# we expect an ICMP6 error, as we do not support source routing
6
7print("send with fragment and routing header type 0 to be source routed")
8
9import os
10from addr import *
11from scapy.all import *
12
13pid=os.getpid()
14eid=pid & 0xffff
15fid=pid & 0xffffffff
16payload=b"ABCDEFGHIJKLMNOP"
17packet=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/\
18    IPv6ExtHdrFragment(id=fid)/\
19    IPv6ExtHdrRouting(addresses=[OTHER_FAKE1_ADDR6, OTHER_FAKE2_ADDR6], \
20    segleft=2)/\
21    ICMPv6EchoRequest(id=eid, data=payload)
22eth=Ether(src=LOCAL_MAC, dst=REMOTE_MAC)/packet
23
24if os.fork() == 0:
25	time.sleep(1)
26	sendp(eth, iface=LOCAL_IF)
27	os._exit(0)
28
29ans=sniff(iface=LOCAL_IF, timeout=3, filter=
30    "ip6 and dst "+LOCAL_ADDR6+" and icmp6")
31for a in ans:
32	if a and a.type == ETH_P_IPV6 and \
33	    ipv6nh[a.payload.nh] == 'ICMPv6' and \
34	    icmp6types[a.payload.payload.type] == 'Parameter problem':
35		pprob=a.payload.payload
36		code=pprob.code
37		print("code=%#d" % (code))
38		if code != 0:
39			print("WRONG PARAMETER PROBLEM CODE")
40			exit(2)
41		ptr=pprob.ptr
42		print("ptr=%#d" % (ptr))
43		if ptr != 50:
44			print("WRONG PARAMETER PROBLEM POINTER")
45			exit(2)
46		exit(0)
47print("NO ICMP6 PARAMETER PROBLEM")
48exit(1)
49