+++ /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.
-
-from scapy.all import *
-from resources.libraries.python.PacketVerifier \
- import Interface, create_gratuitous_arp_request, auto_pad
-from optparse import OptionParser
-
-
-def check_ttl(ttl_begin, ttl_end, ttl_diff):
- if ttl_begin != ttl_end + ttl_diff:
- src_if.close()
- if dst_if_defined:
- dst_if.close()
- raise Exception(
- "TTL changed from {} to {} but decrease by {} expected")\
- .format(ttl_begin, ttl_end, hops)
-
-
-def ckeck_packets_equal(pkt_send, pkt_recv):
- pkt_send_raw = str(pkt_send)
- pkt_recv_raw = str(pkt_recv)
- if pkt_send_raw != pkt_recv_raw:
- print "Sent: {}".format(pkt_send_raw.encode('hex'))
- print "Received: {}".format(pkt_recv_raw.encode('hex'))
- print "Sent:"
- Ether(pkt_send_raw).show2()
- print "Received:"
- Ether(pkt_recv_raw).show2()
- src_if.close()
- if dst_if_defined:
- dst_if.close()
- raise Exception("Sent packet doesn't match received packet")
-
-
-parser = OptionParser()
-parser.add_option("--src_if", dest="src_if")
-parser.add_option("--dst_if", dest="dst_if") # optional
-parser.add_option("--src_mac", dest="src_mac")
-parser.add_option("--first_hop_mac", dest="first_hop_mac")
-parser.add_option("--dst_mac", dest="dst_mac") # optional
-parser.add_option("--src_ip", dest="src_ip")
-parser.add_option("--dst_ip", dest="dst_ip")
-parser.add_option("--hops", dest="hops") # optional
-# If one of 'dst_if', 'dst_mac' and 'hops' is specified all must be specified.
-(opts, args) = parser.parse_args()
-src_if_name = opts.src_if
-dst_if_name = opts.dst_if
-dst_if_defined = True
-if dst_if_name is None:
- dst_if_defined = False
-src_mac = opts.src_mac
-first_hop_mac = opts.first_hop_mac
-dst_mac = opts.dst_mac
-src_ip = opts.src_ip
-dst_ip = opts.dst_ip
-hops = int(opts.hops)
-
-if dst_if_defined and (src_if_name == dst_if_name):
- raise Exception("Source interface name equals destination interface name")
-
-src_if = Interface(src_if_name)
-src_if.send_pkt(create_gratuitous_arp_request(src_mac, src_ip))
-if dst_if_defined:
- dst_if = Interface(dst_if_name)
- dst_if.send_pkt(create_gratuitous_arp_request(dst_mac, dst_ip))
-
-pkt_req_send = auto_pad(Ether(src=src_mac, dst=first_hop_mac) /
- IP(src=src_ip, dst=dst_ip) /
- ICMP())
-pkt_req_send = Ether(pkt_req_send)
-src_if.send_pkt(pkt_req_send)
-
-if dst_if_defined:
- try:
- pkt_req_recv = dst_if.recv_pkt()
- except:
- src_if.close()
- if dst_if_defined:
- dst_if.close()
- raise
-
- check_ttl(pkt_req_send[IP].ttl, pkt_req_recv[IP].ttl, hops)
- pkt_req_send_mod = pkt_req_send.copy()
- pkt_req_send_mod[IP].ttl = pkt_req_recv[IP].ttl
- del pkt_req_send_mod[IP].chksum # update checksum
- ckeck_packets_equal(pkt_req_send_mod[IP], pkt_req_recv[IP])
-
- pkt_resp_send = auto_pad(Ether(src=dst_mac, dst=pkt_req_recv.src) /
- IP(src=dst_ip, dst=src_ip) /
- ICMP(type=0)) # echo-reply
- pkt_resp_send = Ether(pkt_resp_send)
- dst_if.send_pkt(pkt_resp_send)
-
-try:
- pkt_resp_recv = src_if.recv_pkt()
-except:
- src_if.close()
- if dst_if_defined:
- dst_if.close()
- raise
-
-if dst_if_defined:
- check_ttl(pkt_resp_send[IP].ttl, pkt_resp_recv[IP].ttl, hops)
- pkt_resp_send_mod = pkt_resp_send.copy()
- pkt_resp_send_mod[IP].ttl = pkt_resp_recv[IP].ttl
- del pkt_resp_send_mod[IP].chksum # update checksum
- ckeck_packets_equal(pkt_resp_send_mod[IP], pkt_resp_recv[IP])
-
-src_if.close()
-if dst_if_defined:
- dst_if.close()