resources/traffic_scripts/ipv6_sweep_ping.py

   1 #!/usr/bin/env python
   2
   3 # Copyright (c) 2016 Cisco and/or its affiliates.
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at:
   7 #
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16 """Traffic script for IPv6 sweep ping."""
  17
  18 import sys
  19 import logging
  20 import os
  21 logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
  22 from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
  23 from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
  24 from scapy.layers.inet6 import IPv6, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr
  25 from scapy.layers.inet6 import ICMPv6EchoRequest, ICMPv6EchoReply
  26 from scapy.all import Ether
  27
  28
  29 def main():
  30     # start_size - start size of the ICMPv6 echo data
  31     # end_size - end size of the ICMPv6 echo data
  32     # step - increment step
  33     args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip',
  34                              'start_size', 'end_size', 'step'])
  35
  36     rxq = RxQueue(args.get_arg('rx_if'))
  37     txq = TxQueue(args.get_arg('tx_if'))
  38
  39     src_mac = args.get_arg('src_mac')
  40     dst_mac = args.get_arg('dst_mac')
  41     src_ip = args.get_arg('src_ip')
  42     dst_ip = args.get_arg('dst_ip')
  43     start_size = int(args.get_arg('start_size'))
  44     end_size = int(args.get_arg('end_size'))
  45     step = int(args.get_arg('step'))
  46     echo_id = 0xa
  47     # generate some random data buffer
  48     data = bytearray(os.urandom(end_size))
  49
  50     # send ICMPv6 neighbor advertisement message
  51     sent_packets = []
  52     pkt_send = (Ether(src=src_mac, dst=dst_mac) /
  53                       IPv6(src=src_ip, dst=dst_ip) /
  54                       ICMPv6ND_NA(tgt=src_ip, R=0) /
  55                       ICMPv6NDOptDstLLAddr(lladdr=src_mac))
  56     sent_packets.append(pkt_send)
  57     txq.send(pkt_send)
  58
  59     # send ICMPv6 echo request with incremented data length and receive ICMPv6
  60     # echo reply
  61     for echo_seq in range(start_size, end_size+1, step):
  62         pkt_send = (Ether(src=src_mac, dst=dst_mac) /
  63                           IPv6(src=src_ip, dst=dst_ip) /
  64                           ICMPv6EchoRequest(id=echo_id, seq=echo_seq,
  65                                             data=data[0:echo_seq]))
  66         sent_packets.append(pkt_send)
  67         txq.send(pkt_send)
  68
  69         ether = rxq.recv(ignore=sent_packets)
  70         if ether is None:
  71             rxq._proc.terminate()
  72             raise RuntimeError(
  73                 'ICMPv6 echo reply seq {0} Rx timeout'.format(echo_seq))
  74
  75         if not ether.haslayer(IPv6):
  76             rxq._proc.terminate()
  77             raise RuntimeError(
  78                 'Unexpected packet with no IPv6 received {0}'.format(
  79                     ether.__repr__()))
  80
  81         ipv6 = ether['IPv6']
  82
  83         if not ipv6.haslayer(ICMPv6EchoReply):
  84             rxq._proc.terminate()
  85             raise RuntimeError(
  86                 'Unexpected packet with no IPv6 ICMP received {0}'.format(
  87                     ipv6.__repr__()))
  88
  89         icmpv6 = ipv6['ICMPv6 Echo Reply']
  90
  91         if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
  92             rxq._proc.terminate()
  93             raise RuntimeError(
  94                 'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' +
  95                 'ID {2} seq {3}, {0}'.format(icmpv6.id, icmpv6.seq, echo_id,
  96                                              echo_seq))
  97
  98         cksum = icmpv6.cksum
  99         del icmpv6.cksum
 100         tmp = ICMPv6EchoReply(str(icmpv6))
 101         if tmp.cksum != cksum:
 102             rxq._proc.terminate()
 103             raise RuntimeError(
 104                 'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
 105
 106     rxq._proc.terminate()
 107     sys.exit(0)
 108
 109 if __name__ == "__main__":
 110     main()