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authorStefan Kobza <skobza@cisco.com>2016-01-11 18:03:25 +0100
committerStefan Kobza <skobza@cisco.com>2016-02-08 22:38:32 +0100
commit33499c81c94c2d3baef9d3e9f061cd76ef86fa74 (patch)
tree2d000ba17b821339a05e0c039f71e48e09553de9 /resources/traffic_scripts/ipv4_ping_ttl_check.py
parent5cbeca02602061d32212e14f289d65cf648920e4 (diff)
New version of RF tests.
Change-Id: I241a2b7a7706e65f71cfd4a62e2a40f053fc5d07 Signed-off-by: Stefan Kobza <skobza@cisco.com>
Diffstat (limited to 'resources/traffic_scripts/ipv4_ping_ttl_check.py')
-rwxr-xr-xresources/traffic_scripts/ipv4_ping_ttl_check.py124
1 files changed, 124 insertions, 0 deletions
diff --git a/resources/traffic_scripts/ipv4_ping_ttl_check.py b/resources/traffic_scripts/ipv4_ping_ttl_check.py
new file mode 100755
index 0000000000..050a1d7b29
--- /dev/null
+++ b/resources/traffic_scripts/ipv4_ping_ttl_check.py
@@ -0,0 +1,124 @@
+#!/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()