CSIT-18: Add GRE tunnel libraries and tests.

Change-Id: I91ccd65a26ea1782611bccc3badd91e64366a162
Signed-off-by: Matej Klotton <mklotton@cisco.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/resources/traffic_scripts/send_gre_check_icmp_headers.py b/resources/traffic_scripts/send_gre_check_icmp_headers.py
new file mode 100755
index 0000000000..27eac5d786
--- /dev/null
+++ b/resources/traffic_scripts/send_gre_check_icmp_headers.py
@@ -0,0 +1,86 @@
+#!/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 a GRE encapsulated ICMPv4 packet from one
+interface to the other, where is expected ICMPv4 without GRE header.
+"""
+
+import sys
+
+from robot.api import logger
+from scapy.all import Ether
+from scapy.layers.inet import IP_PROTOS
+from scapy.layers.inet import IP
+from scapy.layers.inet import ICMP
+from scapy.layers.l2 import GRE
+
+from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+
+
+def main():
+    args = TrafficScriptArg(
+        ['tx_dst_mac', 'rx_dst_mac',
+         'inner_src_ip', 'inner_dst_ip',
+         'outer_src_ip', 'outer_dst_ip'])
+
+    tx_if = args.get_arg('tx_if')
+    rx_if = args.get_arg('rx_if')
+    tx_dst_mac = args.get_arg('tx_dst_mac')
+    rx_dst_mac = args.get_arg('rx_dst_mac')
+    inner_src_ip = args.get_arg('inner_src_ip')
+    inner_dst_ip = args.get_arg('inner_dst_ip')
+    outer_src_ip = args.get_arg('outer_src_ip')
+    outer_dst_ip = args.get_arg('outer_dst_ip')
+
+    rxq = RxQueue(rx_if)
+    txq = TxQueue(tx_if)
+    sent_packets = []
+
+    tx_pkt_raw = Ether(dst=tx_dst_mac) / \
+        IP(src=outer_src_ip, dst=outer_dst_ip) / \
+        GRE() / \
+        IP(src=inner_src_ip, dst=inner_dst_ip) / \
+        ICMP()
+
+    sent_packets.append(tx_pkt_raw)
+    txq.send(tx_pkt_raw)
+    ether = rxq.recv(2)
+
+    if ether is None:
+        raise RuntimeError("ICMP echo Rx timeout")
+
+    # Check RX headers
+    if ether.dst != rx_dst_mac:
+        raise RuntimeError("Matching of received destination MAC unsuccessful.")
+    logger.debug("Comparison of received destination MAC: OK.")
+
+    if ether['IP'].src != inner_src_ip:
+        raise RuntimeError("Matching of received inner source IP unsuccessful.")
+    logger.debug("Comparison of received outer source IP: OK.")
+
+    if ether['IP'].dst != inner_dst_ip:
+        raise RuntimeError(
+            "Matching of received inner destination IP unsuccessful.")
+    logger.debug("Comparison of received outer destination IP: OK.")
+
+    if ether['IP'].proto != IP_PROTOS.icmp:
+        raise RuntimeError("IP protocol is other than ICMP.")
+    logger.debug("Comparison of received ICMP protocol: OK.")
+
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()