X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Ftraffic_scripts%2Farp_request.py;fp=resources%2Ftraffic_scripts%2Farp_request.py;h=86a4c015cd129c7bac1ca48d8438331ab77ce6a7;hp=0000000000000000000000000000000000000000;hb=b92a827b1c7f48da4214e992e5503ebe1c182416;hpb=33499c81c94c2d3baef9d3e9f061cd76ef86fa74

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()