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#!/usr/bin/env python
# Copyright (c) 2016 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.
"""Macswap test."""
from scapy.all import Ether, IP
from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
def check_macswap(pkt_send, pkt_recv):
"""Compare MAC addresses of sent and received packet.
:param pkt_send: Sent packet.
:param pkt_recv: Received packet.
:type pkt_send: Ether
:type pkt_recv: Ether
"""
print "Comparing following packets:"
pkt_send.show2()
pkt_recv.show2()
if pkt_send.dst != pkt_recv.src or pkt_send.src != pkt_recv.dst:
raise RuntimeError("MAC addresses were not swapped.")
def main():
"""Main function."""
args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip'])
rxq = RxQueue(args.get_arg('rx_if'))
txq = TxQueue(args.get_arg('tx_if'))
src_mac = args.get_arg('src_mac')
dst_mac = args.get_arg('dst_mac')
src_ip = args.get_arg('src_ip')
dst_ip = args.get_arg('dst_ip')
pkt_send = (Ether(src=src_mac, dst=dst_mac) /
IP(src=src_ip, dst=dst_ip, proto=61))
sent_packets = []
sent_packets.append(pkt_send)
txq.send(pkt_send)
pkt_recv = rxq.recv(ignore=sent_packets)
if pkt_recv is None:
raise RuntimeError('Timeout waiting for packet')
check_macswap(pkt_send, pkt_recv)
if __name__ == "__main__":
main()
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