+++ /dev/null
-#!/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.
-
-"""Traffic script that sends an IP ICMPv4."""
-
-import sys
-
-from scapy.layers.inet import ICMP, IP
-from scapy.all import Ether
-
-from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
-from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-
-
-def is_icmp_reply(pkt):
- """Return True if pkt is echo reply, else return False. If exception occurs
- return False."""
- try:
- if pkt['IP']['ICMP'].type == 0: # 0 - echo-reply
- return True
- else:
- return False
- except:
- return False
-
-
-def address_check(request, reply):
- """Compare request packet source address with reply destination address
- and vice versa. If exception occurs return False."""
- try:
- return reply['IP'].src == request['IP'].dst \
- and reply['IP'].dst == request['IP'].src
- except:
- return False
-
-
-def main():
- """Send ICMP echo request and wait for ICMP echo reply. It ignores all other
- packets."""
- args = TrafficScriptArg(['dst_mac', 'src_mac', 'dst_ip', 'src_ip',
- 'timeout'])
-
- dst_mac = args.get_arg('dst_mac')
- src_mac = args.get_arg('src_mac')
- dst_ip = args.get_arg('dst_ip')
- src_ip = args.get_arg('src_ip')
- tx_if = args.get_arg('tx_if')
- rx_if = args.get_arg('rx_if')
- timeout = int(args.get_arg('timeout'))
- wait_step = 1
-
- rxq = RxQueue(rx_if)
- txq = TxQueue(tx_if)
- sent_packets = []
-
- # Create empty ip ICMP packet
- icmp_request = (Ether(src=src_mac, dst=dst_mac) /
- IP(src=src_ip, dst=dst_ip) /
- ICMP())
- # Send created packet on the interface
- sent_packets.append(icmp_request)
- txq.send(icmp_request)
-
- for _ in range(1000):
- icmp_reply = rxq.recv(wait_step)
- if icmp_reply is None:
- timeout -= wait_step
- if timeout < 0:
- raise RuntimeError("ICMP echo Rx timeout")
- elif is_icmp_reply(icmp_reply):
- if address_check(icmp_request, icmp_reply):
- break
- else:
- raise RuntimeError("Max packet count limit reached")
-
- print "ICMP echo reply received."
-
- sys.exit(0)
-
-if __name__ == "__main__":
- main()