CSIT-32: Add lightweight hairpinning test

Change-Id: Ibb62cab0891dfd2bd347c85e89d41bf02f2f96ac
Signed-off-by: Matej Klotton <mklotton@cisco.com>

1 files changed, 144 insertions, 0 deletions

diff --git a/resources/traffic_scripts/send_lw_4o6_check_hairpinning_udp.py b/resources/traffic_scripts/send_lw_4o6_check_hairpinning_udp.py
new file mode 100755
index 0000000000..df6bc42da5
--- /dev/null
+++ b/resources/traffic_scripts/send_lw_4o6_check_hairpinning_udp.py
@@ -0,0 +1,144 @@
+#!/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 empty IPv4 UDP datagram encapsulated in IPv6
+and checks if is correctly re-encapsulated."""
+
+import sys
+
+from scapy.layers.l2 import Ether
+from scapy.layers.inet6 import IPv6
+from scapy.layers.inet import IP, UDP
+
+from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+
+
+def _is_ipv4_in_ipv6(pkt):
+    """If IPv6 next header type in the given pkt is IPv4, return True,
+    else return False. False is returned also if exception occurs."""
+    ipv6_type = int('0x86dd', 16)  # IPv6
+    try:
+        if pkt.type == ipv6_type:
+            if pkt.payload.nh == 4:
+                return True
+    except:  # pylint: disable=bare-except
+        return False
+    return False
+
+
+def main():  # pylint: disable=too-many-statements, too-many-locals
+    """Main function of the script file."""
+    args = TrafficScriptArg(['tx_dst_mac',
+                             'tx_dst_ipv6', 'tx_src_ipv6',
+                             'tx_dst_ipv4', 'tx_src_ipv4',
+                             'tx_dst_udp_port', 'tx_src_udp_port',
+                             'rx_dst_mac', 'rx_src_mac',
+                             'rx_dst_ipv6', 'rx_src_ipv6'])
+    rx_if = args.get_arg('rx_if')
+    tx_if = args.get_arg('tx_if')
+    tx_dst_mac = args.get_arg('tx_dst_mac')
+    tx_src_mac = '02:00:00:00:00:01'
+
+    tx_dst_ipv6 = args.get_arg('tx_dst_ipv6')
+    tx_src_ipv6 = args.get_arg('tx_src_ipv6')
+    tx_dst_ipv4 = args.get_arg('tx_dst_ipv4')
+    tx_src_ipv4 = args.get_arg('tx_src_ipv4')
+    tx_dst_udp_port = int(args.get_arg('tx_dst_udp_port'))
+    tx_src_udp_port = int(args.get_arg('tx_src_udp_port'))
+    rx_dst_mac = args.get_arg('rx_dst_mac')
+    rx_src_mac = args.get_arg('rx_src_mac')
+    rx_dst_ipv6 = args.get_arg('rx_dst_ipv6')
+    rx_src_ipv6 = args.get_arg('rx_src_ipv6')
+
+    rxq = RxQueue(rx_if)
+    txq = TxQueue(tx_if)
+    sent_packets = []
+
+    # Create empty UDP datagram in IPv4 and IPv6
+    tx_pkt = Ether(dst=tx_dst_mac, src=tx_src_mac)
+    tx_pkt /= IPv6(src=tx_src_ipv6, dst=tx_dst_ipv6)
+    tx_pkt /= IP(src=tx_src_ipv4, dst=tx_dst_ipv4)
+    tx_pkt /= UDP(sport=tx_src_udp_port, dport=tx_dst_udp_port)
+
+    txq.send(tx_pkt)
+    sent_packets.append(tx_pkt)
+
+    for _ in range(5):
+        pkt = rxq.recv(2, ignore=sent_packets)
+        if _is_ipv4_in_ipv6(pkt):
+            ether = pkt
+            break
+    else:
+        raise RuntimeError("IPv4 in IPv6 Rx error.")
+
+    # check ethernet
+    if ether.dst != rx_dst_mac:
+        raise RuntimeError("Destination MAC error {} != {}.".
+                           format(ether.dst, rx_dst_mac))
+    print "Destination MAC: OK."
+
+    if ether.src != rx_src_mac:
+        raise RuntimeError("Source MAC error {} != {}.".
+                           format(ether.src, rx_src_mac))
+    print "Source MAC: OK."
+
+    ipv6 = ether.payload
+
+    # check ipv6
+    if ipv6.dst != rx_dst_ipv6:
+        raise RuntimeError("Destination IPv6 error {} != {}.".
+                           format(ipv6.dst, rx_dst_ipv6))
+    print "Destination IPv6: OK."
+
+    if ipv6.src != rx_src_ipv6:
+        raise RuntimeError("Source IPv6 error {} != {}.".
+                           format(ipv6.src, rx_src_ipv6))
+    print "Source IPv6: OK."
+
+    ipv4 = ipv6.payload
+
+    # check ipv4
+    if ipv4.dst != tx_dst_ipv4:
+        raise RuntimeError("Destination IPv4 error {} != {}.".
+                           format(ipv4.dst, tx_dst_ipv4))
+    print "Destination IPv4: OK."
+
+    if ipv4.src != tx_src_ipv4:
+        raise RuntimeError("Source IPv4 error {} != {}.".
+                           format(ipv4.src, tx_src_ipv4))
+    print "Source IPv4: OK."
+
+    if ipv4.proto != 17:  # UDP
+        raise RuntimeError("IPv4 protocol error {} != UDP.".
+                           format(ipv4.proto))
+    print "IPv4 protocol: OK."
+
+    udp = ipv4.payload
+
+    # check udp
+    if udp.dport != tx_dst_udp_port:
+        raise RuntimeError("UDP dport error {} != {}.".
+                           format(udp.dport, tx_dst_udp_port))
+    print "UDP dport: OK."
+
+    if udp.sport != tx_src_udp_port:
+        raise RuntimeError("UDP sport error {} != {}.".
+                           format(udp.sport, tx_src_udp_port))
+    print "UDP sport: OK."
+
+    sys.exit(0)
+
+if __name__ == "__main__":
+    main()