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Diffstat (limited to 'resources/traffic_scripts/policer.py')
-rwxr-xr-x | resources/traffic_scripts/policer.py | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/resources/traffic_scripts/policer.py b/resources/traffic_scripts/policer.py deleted file mode 100755 index 97cad612ac..0000000000 --- a/resources/traffic_scripts/policer.py +++ /dev/null @@ -1,122 +0,0 @@ -#!/usr/bin/env python3 - -# Copyright (c) 2019 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 for IPsec verification.""" - -import sys -import logging - -from ipaddress import ip_address -from scapy.layers.l2 import Ether -from scapy.layers.inet import IP, TCP -from scapy.layers.inet6 import IPv6, ICMPv6ND_NS -from scapy.packet import Raw - -from resources.libraries.python.TrafficScriptArg import TrafficScriptArg -from resources.libraries.python.PacketVerifier import RxQueue, TxQueue - - -def check_ipv4(pkt_recv, dscp): - """Check received IPv4 IPsec packet. - - :param pkt_recv: Received packet to verify. - :param dscp: DSCP value to check. - :type pkt_recv: scapy.Ether - :type dscp: int - :raises RuntimeError: If received packet is invalid. - """ - if not pkt_recv.haslayer(IP): - raise RuntimeError(f"Not an IPv4 packet received: {pkt_recv!r}") - - rx_dscp = pkt_recv[IP].tos >> 2 - if rx_dscp != dscp: - raise RuntimeError(f"Invalid DSCP {rx_dscp} should be {dscp}") - - if not pkt_recv.haslayer(TCP): - raise RuntimeError(f"Not a TCP packet received: {pkt_recv!r}") - - -def check_ipv6(pkt_recv, dscp): - """Check received IPv6 IPsec packet. - - :param pkt_recv: Received packet to verify. - :param dscp: DSCP value to check. - :type pkt_recv: scapy.Ether - :type dscp: int - :raises RuntimeError: If received packet is invalid. - """ - if not pkt_recv.haslayer(IPv6): - raise RuntimeError(f"Not an IPv6 packet received: {pkt_recv!r}") - - rx_dscp = pkt_recv[IPv6].tc >> 2 - if rx_dscp != dscp: - raise RuntimeError(f"Invalid DSCP {rx_dscp} should be {dscp}") - - if not pkt_recv.haslayer(TCP): - raise RuntimeError(f"Not a TCP packet received: {pkt_recv!r}") - - -# TODO: Pylint says too-many-locals and too-many-statements. Refactor! -def main(): - """Send and receive TCP packet.""" - args = TrafficScriptArg( - [u"src_mac", u"dst_mac", u"src_ip", u"dst_ip", u"dscp"] - ) - - rxq = RxQueue(args.get_arg(u"rx_if")) - txq = TxQueue(args.get_arg(u"tx_if")) - - src_mac = args.get_arg(u"src_mac") - dst_mac = args.get_arg(u"dst_mac") - src_ip = args.get_arg(u"src_ip") - dst_ip = args.get_arg(u"dst_ip") - dscp = int(args.get_arg(u"dscp")) - - ip_layer = IPv6 if ip_address(src_ip).version == 6 else IP - - sent_packets = list() - pkt_send = (Ether(src=src_mac, dst=dst_mac) / - ip_layer(src=src_ip, dst=dst_ip) / - TCP()) - - pkt_send /= Raw() - sent_packets.append(pkt_send) - txq.send(pkt_send) - - while True: - pkt_recv = rxq.recv(2, sent_packets) - if pkt_recv is None: - raise RuntimeError(u"ICMPv6 echo reply Rx timeout") - - if pkt_recv.haslayer(ICMPv6ND_NS): - # read another packet in the queue if the current one is ICMPv6ND_NS - continue - else: - # otherwise process the current packet - break - - if pkt_recv is None: - raise RuntimeError(u"Rx timeout") - - if ip_layer == IP: - check_ipv4(pkt_recv, dscp) - else: - check_ipv6(pkt_recv, dscp) - - sys.exit(0) - - -if __name__ == u"__main__": - main() |