1*527238f8Sbluhm#!/usr/local/bin/python3 2320944d6Sbluhm 3*527238f8Sbluhmprint("ping6 fragment with mf=0 that overlaps the first fragment") 4320944d6Sbluhm 5320944d6Sbluhm# |---------| 6320944d6Sbluhm# |XXXX| 7320944d6Sbluhm# |----| 8320944d6Sbluhm 9320944d6Sbluhmimport os 10320944d6Sbluhmfrom addr import * 11320944d6Sbluhmfrom scapy.all import * 12320944d6Sbluhm 139ae5678bSbluhmpid=os.getpid() 149ae5678bSbluhmeid=pid & 0xffff 15*527238f8Sbluhmpayload=b"ABCDEFGHIJKLMNOP" 167b3475a7Sbluhmpacket=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/ \ 177b3475a7Sbluhm ICMPv6EchoRequest(id=eid, data=payload) 18320944d6Sbluhmfrag=[] 199ae5678bSbluhmfid=pid & 0xffffffff 20*527238f8Sbluhmfrag.append(IPv6ExtHdrFragment(nh=58, id=fid, m=1)/bytes(packet)[40:56]) 21*527238f8Sbluhmfrag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=1)/bytes(packet)[48:56]) 22*527238f8Sbluhmfrag.append(IPv6ExtHdrFragment(nh=58, id=fid, offset=2)/bytes(packet)[56:64]) 23320944d6Sbluhmeth=[] 24320944d6Sbluhmfor f in frag: 257b3475a7Sbluhm pkt=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/f 267b3475a7Sbluhm eth.append(Ether(src=LOCAL_MAC, dst=REMOTE_MAC)/pkt) 27320944d6Sbluhm 28320944d6Sbluhmif os.fork() == 0: 29320944d6Sbluhm time.sleep(1) 307b3475a7Sbluhm sendp(eth, iface=LOCAL_IF) 31320944d6Sbluhm os._exit(0) 32320944d6Sbluhm 337b3475a7Sbluhmans=sniff(iface=LOCAL_IF, timeout=3, filter= 347b3475a7Sbluhm "ip6 and src "+REMOTE_ADDR6+" and dst "+LOCAL_ADDR6+" and icmp6") 35320944d6Sbluhmfor a in ans: 36320944d6Sbluhm if a and a.type == ETH_P_IPV6 and \ 37320944d6Sbluhm ipv6nh[a.payload.nh] == 'ICMPv6' and \ 38320944d6Sbluhm icmp6types[a.payload.payload.type] == 'Echo Reply': 39320944d6Sbluhm id=a.payload.payload.id 40*527238f8Sbluhm print("id=%#x" % (id)) 419ae5678bSbluhm if id != eid: 42*527238f8Sbluhm print("WRONG ECHO REPLY ID") 43320944d6Sbluhm exit(2) 44320944d6Sbluhm data=a.payload.payload.data 45*527238f8Sbluhm print("payload=%s" % (data)) 46320944d6Sbluhm if data == payload: 47*527238f8Sbluhm print("ECHO REPLY") 48320944d6Sbluhm exit(1) 49*527238f8Sbluhm print("PAYLOAD!=%s" % (payload)) 50320944d6Sbluhm exit(2) 51*527238f8Sbluhmprint("no echo reply") 52320944d6Sbluhmexit(0) 53