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-rwxr-xr-xresources/traffic_scripts/send_icmp_type_code.py125
1 files changed, 125 insertions, 0 deletions
diff --git a/resources/traffic_scripts/send_icmp_type_code.py b/resources/traffic_scripts/send_icmp_type_code.py
new file mode 100755
index 0000000000..dffaafff38
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+++ b/resources/traffic_scripts/send_icmp_type_code.py
@@ -0,0 +1,125 @@
+#!/usr/bin/env python
+# Copyright (c) 2017 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/ICMPv6 packet from one interface to
+the other one. Dot1q or Dot1ad tagging of the ethernet frame can be set.
+"""
+
+import sys
+import ipaddress
+
+from scapy.layers.inet import ICMP, IP
+from scapy.layers.l2 import Ether
+from scapy.layers.inet6 import ICMPv6EchoRequest
+from scapy.layers.inet6 import IPv6
+
+from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+
+
+def valid_ipv4(ip):
+ """Check if IP address has the correct IPv4 address format.
+
+ :param ip: IP address.
+ :type ip: str
+ :returns: True in case of correct IPv4 address format,
+ otherwise return false.
+ :rtype: bool
+ """
+ try:
+ ipaddress.IPv4Address(unicode(ip))
+ return True
+ except (AttributeError, ipaddress.AddressValueError):
+ return False
+
+
+def valid_ipv6(ip):
+ """Check if IP address has the correct IPv6 address format.
+
+ :param ip: IP address.
+ :type ip: str
+ :returns: True in case of correct IPv6 address format,
+ otherwise return false.
+ :rtype: bool
+ """
+ try:
+ ipaddress.IPv6Address(unicode(ip))
+ return True
+ except (AttributeError, ipaddress.AddressValueError):
+ return False
+
+
+def main():
+ """Send IP ICMPv4/ICMPv6 packet from one traffic generator interface to
+ the other one."""
+
+ args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip',
+ 'icmp_type', 'icmp_code'])
+
+ src_mac = args.get_arg('src_mac')
+ dst_mac = args.get_arg('dst_mac')
+ src_ip = args.get_arg('src_ip')
+ dst_ip = args.get_arg('dst_ip')
+
+ tx_if = args.get_arg('tx_if')
+ rx_if = args.get_arg('rx_if')
+
+ icmp_type = int(args.get_arg('icmp_type'))
+ icmp_code = int(args.get_arg('icmp_code'))
+
+ rxq = RxQueue(rx_if)
+ txq = TxQueue(tx_if)
+
+ sent_packets = []
+
+ # Create empty ip ICMP packet and add padding before sending
+ if valid_ipv4(src_ip) and valid_ipv4(dst_ip):
+ pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+ IP(src=src_ip, dst=dst_ip) /
+ ICMP(code=icmp_code, type=icmp_type))
+ ip_format = 'IP'
+ icmp_format = 'ICMP'
+ elif valid_ipv6(src_ip) and valid_ipv6(dst_ip):
+ pkt_raw = (Ether(src=src_mac, dst=dst_mac) /
+ IPv6(src=src_ip, dst=dst_ip) /
+ ICMPv6EchoRequest(code=icmp_code, type=icmp_type))
+ ip_format = 'IPv6'
+ icmp_format = 'ICMPv6'
+ else:
+ raise ValueError("IP(s) not in correct format")
+
+ # Send created packet on one interface and receive on the other
+ sent_packets.append(pkt_raw)
+ txq.send(pkt_raw)
+
+ ether = rxq.recv(2)
+
+ # Check whether received packet contains layers Ether, IP and ICMP
+ if ether is None:
+ raise RuntimeError('ICMP echo Rx timeout')
+
+ if not ether.haslayer(ip_format):
+ raise RuntimeError('Not an IP packet received {0}'
+ .format(ether.__repr__()))
+
+ # Cannot use haslayer for ICMPv6, every type of ICMPv6 is a separate layer
+ # Next header value of 58 means the next header is ICMPv6
+ if not ether.haslayer(icmp_format) and ether[ip_format].nh != 58:
+ raise RuntimeError('Not an ICMP packet received {0}'
+ .format(ether.__repr__()))
+
+ sys.exit(0)
+
+if __name__ == "__main__":
+ main()