1#!/usr/local/bin/python2.7 2 3print "6 non-overlapping ping6 fragments in 75 seconds, timeout is 60" 4 5# |----| 6# |----| 7# |----| 8# |----| 9# |----| <--- timeout 10# |----| 11 12import os 13from addr import * 14from scapy.all import * 15 16pid=os.getpid() 17eid=pid & 0xffff 18payload="ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcd" 19packet=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/ \ 20 ICMPv6EchoRequest(id=eid, data=payload) 21frag=[] 22fid=pid & 0xffffffff 23frag.append(IPv6ExtHdrFragment(nh=58, id=fid, m=1)/str(packet)[40:48]) 24frag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=1, m=1)/str(packet)[48:56]) 25frag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=2, m=1)/str(packet)[56:64]) 26frag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=3, m=1)/str(packet)[64:72]) 27frag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=4, m=1)/str(packet)[72:80]) 28frag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=5)/str(packet)[80:88]) 29eth=[] 30for f in frag: 31 pkt=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/f 32 eth.append(Ether(src=LOCAL_MAC, dst=REMOTE_MAC)/pkt) 33 34if os.fork() == 0: 35 time.sleep(1) 36 for e in eth: 37 sendp(e, iface=LOCAL_IF) 38 time.sleep(15) 39 os._exit(0) 40 41ans=sniff(iface=LOCAL_IF, timeout=90, filter= 42 "ip6 and src "+REMOTE_ADDR6+" and dst "+LOCAL_ADDR6+" and icmp6") 43for a in ans: 44 if a and a.type == ETH_P_IPV6 and \ 45 ipv6nh[a.payload.nh] == 'ICMPv6' and \ 46 icmp6types[a.payload.payload.type] == 'Echo Reply': 47 id=a.payload.payload.id 48 print "id=%#x" % (id) 49 if id != eid: 50 print "WRONG ECHO REPLY ID" 51 exit(2) 52 data=a.payload.payload.data 53 print "payload=%s" % (data) 54 if data == payload: 55 print "ECHO REPLY" 56 exit(1) 57 print "PAYLOAD!=%s" % (payload) 58 exit(2) 59print "no echo reply" 60exit(0) 61