1 files changed, 92 insertions, 0 deletions
diff --git a/resources/traffic_scripts/send_icmp_wait_for_reply.py b/resources/traffic_scripts/send_icmp_wait_for_reply.py
new file mode 100755
index 0000000000..3c8b71abc8
--- /dev/null
+++ b/resources/traffic_scripts/send_icmp_wait_for_reply.py
@@ -0,0 +1,92 @@
+#!/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()