1 files changed, 185 insertions, 0 deletions
diff --git a/resources/traffic_scripts/icmpv6_echo_req_resp.py b/resources/traffic_scripts/icmpv6_echo_req_resp.py
new file mode 100755
index 0000000000..24f4faa3f4
--- /dev/null
+++ b/resources/traffic_scripts/icmpv6_echo_req_resp.py
@@ -0,0 +1,185 @@
+#!/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 ICMPv6 echo request from one TG port to another through DUT nodes and
+   send reply back. Also verify hop limit processing."""
+
+import sys
+import logging
+logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
+from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+from scapy.layers.inet6 import IPv6, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr
+from scapy.layers.inet6 import ICMPv6EchoRequest, ICMPv6EchoReply
+from scapy.all import Ether
+
+
+def main():
+    args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_nh_mac', 'dst_nh_mac',
+                             'src_ip', 'dst_ip', 'h_num'])
+
+    src_rxq = RxQueue(args.get_arg('rx_if'))
+    src_txq = TxQueue(args.get_arg('rx_if'))
+    dst_rxq = RxQueue(args.get_arg('tx_if'))
+    dst_txq = TxQueue(args.get_arg('tx_if'))
+
+    src_mac = args.get_arg('src_mac')
+    dst_mac = args.get_arg('dst_mac')
+    src_nh_mac = args.get_arg('src_nh_mac')
+    dst_nh_mac = args.get_arg('dst_nh_mac')
+    src_ip = args.get_arg('src_ip')
+    dst_ip = args.get_arg('dst_ip')
+    hop_num = int(args.get_arg('h_num'))
+    hop_limit = 64
+    echo_id = 0xa
+    echo_seq = 0x1
+
+    src_sent_packets = []
+    dst_sent_packets = []
+
+    # send ICMPv6 neighbor advertisement message
+    pkt_send = (Ether(src=src_mac, dst='ff:ff:ff:ff:ff:ff') /
+                      IPv6(src=src_ip, dst='ff02::1:ff00:2') /
+                      ICMPv6ND_NA(tgt=src_ip, R=0) /
+                      ICMPv6NDOptDstLLAddr(lladdr=src_mac))
+    src_sent_packets.append(pkt_send)
+    src_txq.send(pkt_send)
+    pkt_send = (Ether(src=dst_mac, dst='ff:ff:ff:ff:ff:ff') /
+                      IPv6(src=dst_ip, dst='ff02::1:ff00:2') /
+                      ICMPv6ND_NA(tgt=dst_ip, R=0) /
+                      ICMPv6NDOptDstLLAddr(lladdr=dst_mac))
+    dst_sent_packets.append(pkt_send)
+    dst_txq.send(pkt_send)
+
+    # send ICMPv6 echo request from first TG interface
+    pkt_send = (Ether(src=src_mac, dst=src_nh_mac) /
+                      IPv6(src=src_ip, dst=dst_ip, hlim=hop_limit) /
+                      ICMPv6EchoRequest(id=echo_id, seq=echo_seq))
+    src_sent_packets.append(pkt_send)
+    src_txq.send(pkt_send)
+
+    # receive ICMPv6 echo request on second TG interface
+    ether = dst_rxq.recv(2, dst_sent_packets)
+    if ether is None:
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError('ICMPv6 echo reply Rx timeout')
+
+    if not ether.haslayer(IPv6):
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError('Unexpected packet with no IPv6 received {0}'.format(
+            ether.__repr__()))
+
+    ipv6 = ether['IPv6']
+
+    # verify hop limit processing
+    if ipv6.hlim != (hop_limit - hop_num):
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError(
+            'Invalid hop limit {0} should be {1}'.format(ipv6.hlim,
+                                                         hop_limit - hop_num))
+
+    if not ipv6.haslayer(ICMPv6EchoRequest):
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError(
+            'Unexpected packet with no IPv6 ICMP received {0}'.format(
+                ipv6.__repr__()))
+
+    icmpv6 = ipv6['ICMPv6 Echo Request']
+
+    # check identifier and sequence number
+    if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError(
+            'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' +
+            'ID {2} seq {3}'.format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
+
+    # verify checksum
+    cksum = icmpv6.cksum
+    del icmpv6.cksum
+    tmp = ICMPv6EchoRequest(str(icmpv6))
+    if tmp.cksum != cksum:
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError(
+            'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
+
+    # send ICMPv6 echo reply from second TG interface
+    pkt_send = (Ether(src=dst_mac, dst=dst_nh_mac) /
+                      IPv6(src=dst_ip, dst=src_ip) /
+                      ICMPv6EchoReply(id=echo_id, seq=echo_seq))
+    dst_sent_packets.append(pkt_send)
+    dst_txq.send(pkt_send)
+
+    # receive ICMPv6 echo reply on first TG interface
+    ether = src_rxq.recv(2, src_sent_packets)
+    if ether is None:
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError('ICMPv6 echo reply Rx timeout')
+
+    if not ether.haslayer(IPv6):
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError('Unexpected packet with no IPv6 received {0}'.format(
+            ether.__repr__()))
+
+    ipv6 = ether['IPv6']
+
+    # verify hop limit processing
+    if ipv6.hlim != (hop_limit - hop_num):
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError(
+            'Invalid hop limit {0} should be {1}'.format(ipv6.hlim,
+                                                         hop_limit - hop_num))
+
+    if not ipv6.haslayer(ICMPv6EchoReply):
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError(
+            'Unexpected packet with no IPv6 ICMP received {0}'.format(
+                ipv6.__repr__()))
+
+    icmpv6 = ipv6['ICMPv6 Echo Reply']
+
+    # check identifier and sequence number
+    if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError(
+            'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' +
+            'ID {2} seq {3}'.format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
+
+    # verify checksum
+    cksum = icmpv6.cksum
+    del icmpv6.cksum
+    tmp = ICMPv6EchoReply(str(icmpv6))
+    if tmp.cksum != cksum:
+        src_rxq._proc.terminate()
+        dst_rxq._proc.terminate()
+        raise RuntimeError(
+            'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
+
+    src_rxq._proc.terminate()
+    dst_rxq._proc.terminate()
+    sys.exit(0)
+
+if __name__ == "__main__":
+    main()