aboutsummaryrefslogtreecommitdiffstats
path: root/resources/traffic_scripts/arp_request.py
diff options
context:
space:
mode:
Diffstat (limited to 'resources/traffic_scripts/arp_request.py')
-rwxr-xr-xresources/traffic_scripts/arp_request.py118
1 files changed, 118 insertions, 0 deletions
diff --git a/resources/traffic_scripts/arp_request.py b/resources/traffic_scripts/arp_request.py
new file mode 100755
index 0000000000..86a4c015cd
--- /dev/null
+++ b/resources/traffic_scripts/arp_request.py
@@ -0,0 +1,118 @@
+#!/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.
+
+"""Send an ARP request and verify the reply"""
+
+import sys
+
+from scapy.all import Ether, ARP
+
+from resources.libraries.python.PacketVerifier import Interface
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+
+
+def parse_arguments():
+ """Parse arguments of the script passed through command line
+
+ :return: tuple of parsed arguments
+ """
+ args = TrafficScriptArg(['src_if', 'src_mac', 'dst_mac',
+ 'src_ip', 'dst_ip'])
+
+ # check for mandatory parameters
+ params = (args.get_arg('tx_if'),
+ args.get_arg('src_mac'),
+ args.get_arg('dst_mac'),
+ args.get_arg('src_ip'),
+ args.get_arg('dst_ip'))
+ if None in params:
+ raise Exception('Missing mandatory parameter(s)!')
+
+ return params
+
+
+def arp_request_test():
+ """Send ARP request, expect a reply and verify its fields.
+
+ returns: test status
+ """
+ test_passed = False
+ (src_if, src_mac, dst_mac, src_ip, dst_ip) = parse_arguments()
+
+ interface = Interface(src_if)
+
+ # build an ARP request
+ arp_request = (Ether(src=src_mac, dst='ff:ff:ff:ff:ff:ff') /
+ ARP(psrc=src_ip, hwsrc=src_mac, pdst=dst_ip,
+ hwdst='ff:ff:ff:ff:ff:ff'))
+
+ # send the request
+ interface.send_pkt(arp_request)
+
+ try:
+ # wait for APR reply
+ ether = interface.recv_pkt()
+
+ # verify received packet
+
+ if not ether.haslayer(ARP):
+ raise RuntimeError('Unexpected packet: does not contain ARP ' +
+ 'header "{}"'.format(ether.__repr__()))
+
+ arp = ether['ARP']
+ arp_reply = 2
+
+ if arp.op != arp_reply:
+ raise RuntimeError('expected op={}, received {}'.format(arp_reply,
+ arp.op))
+ if arp.ptype != 0x800:
+ raise RuntimeError('expected ptype=0x800, received {}'.
+ format(arp.ptype))
+ if arp.hwlen != 6:
+ raise RuntimeError('expected hwlen=6, received {}'.
+ format(arp.hwlen))
+ if arp.plen != 4:
+ raise RuntimeError('expected plen=4, received {}'.format(arp.plen))
+ if arp.hwsrc != dst_mac:
+ raise RuntimeError('expected hwsrc={}, received {}'.
+ format(dst_mac, arp.hwsrc))
+ if arp.psrc != dst_ip:
+ raise RuntimeError('expected psrc={}, received {}'.
+ format(dst_ip, arp.psrc))
+ if arp.hwdst != src_mac:
+ raise RuntimeError('expected hwdst={}, received {}'.
+ format(src_mac, arp.hwdst))
+ if arp.pdst != src_ip:
+ raise RuntimeError('expected pdst={}, received {}'.
+ format(src_ip, arp.pdst))
+ test_passed = True
+
+ except RuntimeError as ex:
+ print 'Error occurred: {}'.format(ex)
+ finally:
+ interface.close()
+
+ return test_passed
+
+
+def main():
+ """Run the test and collect result"""
+ if arp_request_test():
+ sys.exit(0)
+ else:
+ sys.exit(1)
+
+if __name__ == '__main__':
+ main()