1*527238f8Sbluhm#!/usr/local/bin/python3 2320944d6Sbluhm 3*527238f8Sbluhmprint("ping6 fragment that overlaps longer than the last fragment with m=0") 4320944d6Sbluhm 5320944d6Sbluhm# |---------| 67cd47444Sbluhm# |XXXX| 7320944d6Sbluhm# |----| 8320944d6Sbluhm 9320944d6Sbluhmimport os 10320944d6Sbluhmfrom addr import * 11320944d6Sbluhmfrom scapy.all import * 12320944d6Sbluhm 139ae5678bSbluhmpid=os.getpid() 149ae5678bSbluhmeid=pid & 0xffff 15*527238f8Sbluhmpayload=b"ABCDEFGHIJKLMNOP" 16*527238f8Sbluhmdummy=b"01234567" 177b3475a7Sbluhmpacket=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/ \ 187b3475a7Sbluhm ICMPv6EchoRequest(id=eid, data=payload) 19320944d6Sbluhmfrag=[] 209ae5678bSbluhmfid=pid & 0xffffffff 21*527238f8Sbluhmfrag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=1)/bytes(packet)[48:64]) 227cd47444Sbluhmfrag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=3)/dummy) 23*527238f8Sbluhmfrag.append(IPv6ExtHdrFragment(nh=58, id=fid, m=1)/bytes(packet)[40:48]) 24320944d6Sbluhmeth=[] 25320944d6Sbluhmfor f in frag: 267b3475a7Sbluhm pkt=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/f 277b3475a7Sbluhm eth.append(Ether(src=LOCAL_MAC, dst=REMOTE_MAC)/pkt) 28320944d6Sbluhm 29320944d6Sbluhmif os.fork() == 0: 30320944d6Sbluhm time.sleep(1) 317b3475a7Sbluhm sendp(eth, iface=LOCAL_IF) 32320944d6Sbluhm os._exit(0) 33320944d6Sbluhm 347b3475a7Sbluhmans=sniff(iface=LOCAL_IF, timeout=3, filter= 357b3475a7Sbluhm "ip6 and src "+REMOTE_ADDR6+" and dst "+LOCAL_ADDR6+" and icmp6") 36320944d6Sbluhmfor a in ans: 37320944d6Sbluhm if a and a.type == ETH_P_IPV6 and \ 38320944d6Sbluhm ipv6nh[a.payload.nh] == 'ICMPv6' and \ 39320944d6Sbluhm icmp6types[a.payload.payload.type] == 'Echo Reply': 40320944d6Sbluhm id=a.payload.payload.id 41*527238f8Sbluhm print("id=%#x" % (id)) 429ae5678bSbluhm if id != eid: 43*527238f8Sbluhm print("WRONG ECHO REPLY ID") 44320944d6Sbluhm exit(2) 45320944d6Sbluhm data=a.payload.payload.data 46*527238f8Sbluhm print("payload=%s" % (data)) 47320944d6Sbluhm if data == payload: 48*527238f8Sbluhm print("ECHO REPLY") 49320944d6Sbluhm exit(1) 50*527238f8Sbluhm print("PAYLOAD!=%s" % (payload)) 51320944d6Sbluhm exit(2) 52*527238f8Sbluhmprint("no echo reply") 53320944d6Sbluhmexit(0) 54