+++ /dev/null
-#!/usr/bin/env python
-
-# Copyright (c) 2018 Cisco and/or its affiliates.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at:
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Send ICMPv6 echo request from one TG port to DUT port or to another TG port
- through DUT node(s) and send reply back. Also verify hop limit processing."""
-
-import sys
-import logging
-
-# pylint: disable=no-name-in-module
-# pylint: disable=import-error
-logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
-
-from scapy.layers.inet6 import IPv6, ICMPv6ND_NA, ICMPv6ND_NS
-from scapy.layers.inet6 import ICMPv6NDOptDstLLAddr
-from scapy.layers.inet6 import ICMPv6EchoRequest, ICMPv6EchoReply
-from scapy.all import Ether
-
-from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
-from resources.libraries.python.PacketVerifier import checksum_equal
-from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-
-
-def main():
- args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_nh_mac', 'dst_nh_mac',
- 'src_ip', 'dst_ip', 'h_num'], ['is_dst_tg'])
-
- src_rxq = RxQueue(args.get_arg('tx_if'))
- src_txq = TxQueue(args.get_arg('tx_if'))
-
- src_mac = args.get_arg('src_mac')
- dst_mac = args.get_arg('dst_mac')
- src_nh_mac = args.get_arg('src_nh_mac')
- dst_nh_mac = args.get_arg('dst_nh_mac')
- src_ip = args.get_arg('src_ip')
- dst_ip = args.get_arg('dst_ip')
- hop_num = int(args.get_arg('h_num'))
-
- is_dst_tg = True if args.get_arg('is_dst_tg') in ['True', ''] else False
- dst_rxq = RxQueue(args.get_arg('rx_if')) if is_dst_tg else None
- dst_txq = TxQueue(args.get_arg('rx_if')) if is_dst_tg else None
-
- hop_limit = 64
- echo_id = 0xa
- echo_seq = 0x1
-
- src_sent_packets = []
- dst_sent_packets = []
-
- # send ICMPv6 neighbor advertisement message
- pkt_send = (Ether(src=src_mac, dst='ff:ff:ff:ff:ff:ff') /
- IPv6(src=src_ip, dst='ff02::1:ff00:2') /
- ICMPv6ND_NA(tgt=src_ip, R=0) /
- ICMPv6NDOptDstLLAddr(lladdr=src_mac))
- src_sent_packets.append(pkt_send)
- src_txq.send(pkt_send)
-
- if is_dst_tg:
- # send ICMPv6 neighbor advertisement message
- pkt_send = (Ether(src=dst_mac, dst='ff:ff:ff:ff:ff:ff') /
- IPv6(src=dst_ip, dst='ff02::1:ff00:2') /
- ICMPv6ND_NA(tgt=dst_ip, R=0) /
- ICMPv6NDOptDstLLAddr(lladdr=dst_mac))
- dst_sent_packets.append(pkt_send)
- dst_txq.send(pkt_send)
-
- # send ICMPv6 echo request from first TG interface
- pkt_send = (Ether(src=src_mac, dst=src_nh_mac) /
- IPv6(src=src_ip, dst=dst_ip, hlim=hop_limit) /
- ICMPv6EchoRequest(id=echo_id, seq=echo_seq))
- src_sent_packets.append(pkt_send)
- src_txq.send(pkt_send)
-
- if is_dst_tg:
- # receive ICMPv6 echo request on second TG interface
- while True:
- ether = dst_rxq.recv(2, dst_sent_packets)
- if ether is None:
- raise RuntimeError('ICMPv6 echo reply Rx timeout')
-
- if ether.haslayer(ICMPv6ND_NS):
- # read another packet in the queue if the current one is
- # ICMPv6ND_NS
- continue
- else:
- # otherwise process the current packet
- break
-
- if not ether.haslayer(IPv6):
- raise RuntimeError('Unexpected packet with no IPv6 received: {0}'.
- format(ether.__repr__()))
-
- ipv6 = ether[IPv6]
-
- # verify hop limit processing
- if ipv6.hlim != (hop_limit - hop_num):
- raise RuntimeError('Invalid hop limit {0} should be {1}'.
- format(ipv6.hlim, hop_limit - hop_num))
-
- if not ipv6.haslayer(ICMPv6EchoRequest):
- raise RuntimeError('Unexpected packet with no IPv6 ICMP received '
- '{0}'.format(ipv6.__repr__()))
-
- icmpv6 = ipv6[ICMPv6EchoRequest]
-
- # check identifier and sequence number
- if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
- raise RuntimeError('Invalid ICMPv6 echo reply received ID {0} '
- 'seq {1} should be ID {2} seq {3}'.
- format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
-
- # verify checksum
- cksum = icmpv6.cksum
- del icmpv6.cksum
- tmp = ICMPv6EchoRequest(str(icmpv6))
- if not checksum_equal(tmp.cksum, cksum):
- raise RuntimeError('Invalid checksum {0} should be {1}'.
- format(cksum, tmp.cksum))
-
- # send ICMPv6 echo reply from second TG interface
- pkt_send = (Ether(src=dst_mac, dst=dst_nh_mac) /
- IPv6(src=dst_ip, dst=src_ip, hlim=(ipv6.hlim - 1)) /
- ICMPv6EchoReply(id=echo_id, seq=echo_seq))
- dst_sent_packets.append(pkt_send)
- dst_txq.send(pkt_send)
-
- # receive ICMPv6 echo reply on first TG interface
- while True:
- ether = src_rxq.recv(2, src_sent_packets)
- if ether is None:
- raise RuntimeError('ICMPv6 echo reply Rx timeout')
-
- if ether.haslayer(ICMPv6ND_NS):
- # read another packet in the queue if the current one is ICMPv6ND_NS
- continue
- else:
- # otherwise process the current packet
- break
-
- if not ether.haslayer(IPv6):
- raise RuntimeError('Unexpected packet with no IPv6 layer received {0}'.
- format(ether.__repr__()))
-
- ipv6 = ether[IPv6]
-
- # verify hop limit processing; destination node decrements hlim by one in
- # outgoing ICMPv6 Echo Reply
- directions = 2 if is_dst_tg else 1
- hop_limit_reply = hop_limit - directions * hop_num - 1
- if ipv6.hlim != hop_limit_reply:
- raise RuntimeError('Invalid hop limit {0} should be {1}'.
- format(ipv6.hlim, hop_limit_reply))
-
- if not ipv6.haslayer(ICMPv6EchoReply):
- raise RuntimeError('Unexpected packet with no IPv6 ICMP received {0}'.
- format(ipv6.__repr__()))
-
- icmpv6 = ipv6[ICMPv6EchoReply]
-
- # check identifier and sequence number
- if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
- raise RuntimeError('Invalid ICMPv6 echo reply received ID {0} '
- 'seq {1} should be ID {2} seq {3}'.
- format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
-
- # verify checksum
- cksum = icmpv6.cksum
- del icmpv6.cksum
- tmp = ICMPv6EchoReply(str(icmpv6))
- if not checksum_equal(tmp.cksum, cksum):
- raise RuntimeError('Invalid checksum {0} should be {1}'.
- format(cksum, tmp.cksum))
-
- sys.exit(0)
-
-
-if __name__ == "__main__":
- main()
Code Review / csit.git / blobdiff