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Diffstat (limited to 'resources/traffic_scripts/srv6_encap.py')
| -rwxr-xr-x | resources/traffic_scripts/srv6_encap.py | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/resources/traffic_scripts/srv6_encap.py b/resources/traffic_scripts/srv6_encap.py deleted file mode 100755 index 506a245576..0000000000 --- a/resources/traffic_scripts/srv6_encap.py +++ /dev/null @@ -1,306 +0,0 @@ -#!/usr/bin/env python3 - -# Copyright (c) 2020 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 SRv6 verification.""" - -import sys - -from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, IPv6ExtHdrSegmentRouting,\ - ipv6nh -from scapy.layers.l2 import Ether -from scapy.packet import Raw - -from resources.libraries.python.PacketVerifier import RxQueue, TxQueue -from resources.libraries.python.TrafficScriptArg import TrafficScriptArg - - -def check_srv6( - pkt_recv, src_mac, dst_mac, src_ip, dst_ip, dir_srcsid, dir_dstsid1, - dir_dstsid2, dir_dstsid3, segleft_corr, static_proxy=False): - """Check received SRv6 packet. - - :param pkt_recv: Received packet to verify. - :param src_mac: Source MAC address. - :param dst_mac: Destination MAC address. - :param src_ip: Source IP/IPv6 address of original IP/IPv6 packet. - :param dst_ip: Destination IP/IPv6 address of original IP/IPv6 packet. - :param dir_srcsid: Source SID for SR in desired direction. - :param dir_dstsid1: Destination SID1 in desired direction. - :param dir_dstsid2: Destination SID2 in desired direction. - :param dir_dstsid3: Destination SID3 in desired direction. - :param segleft_corr: Correction for expected segleft value of SRH. - :type pkt_recv: scapy.Ether - :type src_mac: str - :type dst_mac: str - :type src_ip: str - :type dst_ip: str - :type dir_srcsid: str - :type dir_dstsid1: str - :type dir_dstsid2: str - :type dir_dstsid3: str - :type segleft_corr: int - :type static_proxy; bool - :raises RuntimeError: If received packet is invalid. - """ - if pkt_recv[Ether].src != src_mac: - raise RuntimeError( - f"Received frame has invalid source MAC address: " - f"{pkt_recv[Ether].src} should be: {src_mac}" - ) - if pkt_recv[Ether].dst != dst_mac: - raise RuntimeError( - f"Received frame has invalid destination MAC address: " - f"{pkt_recv[Ether].dst} should be: {dst_mac}" - ) - if not pkt_recv.haslayer(IPv6): - raise RuntimeError( - f"Not an IPv6 packet received: {pkt_recv!r}" - ) - ip6_pkt = pkt_recv[IPv6] - if ip6_pkt.src != dir_srcsid: - raise RuntimeError( - f"Outer IPv6 packet has invalid source address: " - f"{ip6_pkt.src} should be: {dir_srcsid}" - ) - dir_dstsids = [dir_dstsid2, dir_dstsid1] if dir_dstsid3 == u"None" \ - else [dir_dstsid3, dir_dstsid2, dir_dstsid1] if not static_proxy \ - else [dir_dstsid3, dir_dstsid2] - segleft = len(dir_dstsids) - segleft_corr if not static_proxy \ - else len(dir_dstsids) - segleft_corr + 1 - if ip6_pkt.dst != dir_dstsids[segleft]: - raise RuntimeError( - f"Outer IPv6 packet has invalid destination address: " - f"{ip6_pkt.dst} should be: {dir_dstsids[segleft]}" - ) - if dir_dstsid2 == u"None": - if ip6_pkt.haslayer(IPv6ExtHdrSegmentRouting): - raise RuntimeError( - f"Segment Routing Header in received packet: {pkt_recv!r}" - ) - if ip6_pkt.nh != 41: # ipv6nh[41] == IPv6 - raise RuntimeError( - f"Outer IPv6 packet has invalid next header: " - f"{ip6_pkt.nh} should be: 41 ({ipv6nh[41]})" - ) - ip6_pkt = ip6_pkt[IPv6][1] - else: - if not pkt_recv.haslayer(IPv6ExtHdrSegmentRouting): - raise RuntimeError( - f"No Segment Routing Header in received packet: {pkt_recv!r}" - ) - if ip6_pkt.nh != 43: # ipv6nh[43] == Routing Header - raise RuntimeError( - f"Outer IPv6 packet has invalid next header: " - f"{pkt_recv[IPv6][0].nh} should be: 43 ({ipv6nh[43]})" - ) - ip6_pkt = ip6_pkt[IPv6ExtHdrSegmentRouting] - if ip6_pkt.addresses != dir_dstsids: - raise RuntimeError( - f"Segment Routing Header has invalid addresses: " - f"{ip6_pkt.addresses} should be: {dir_dstsids}" - ) - if ip6_pkt.segleft != segleft: - raise RuntimeError( - f"Segment Routing Header has invalid segleft value: " - f"{ip6_pkt.segleft} should be: {segleft}" - ) - if ip6_pkt.nh != 41: # ipv6nh[41] == IPv6 - raise RuntimeError( - f"Segment Routing Header has invalid next header: " - f"{ip6_pkt.nh} should be: 41 ({ipv6nh[41]})" - ) - ip6_pkt = ip6_pkt[IPv6] - if ip6_pkt.src != src_ip: - raise RuntimeError( - f"Inner IPv6 packet has invalid source address: " - f"{ip6_pkt.src} should be: {src_ip}" - ) - if ip6_pkt.dst != dst_ip: - raise RuntimeError( - f"Inner IPv6 packet has invalid destination address: " - f"{ip6_pkt.dst} should be: {dst_ip}" - ) - if ip6_pkt.nh != 59: # ipv6nh[59] == No Next Header - raise RuntimeError( - f"Inner IPv6 packet has invalid next header: " - f"{ip6_pkt.nh} should be: 59 ({ipv6nh[59]})" - ) - - -def check_ip(pkt_recv, src_mac, dst_mac, src_ip, dst_ip): - """Check received IPv6 packet. - - :param pkt_recv: Received packet to verify. - :param src_mac: Source MAC address. - :param dst_mac: Destination MAC address. - :param src_ip: Source IP/IPv6 address. - :param dst_ip: Destination IP/IPv6 address. - :type pkt_recv: scapy.Ether - :type src_mac: str - :type dst_mac: str - :type src_ip: str - :type dst_ip: str - :raises RuntimeError: If received packet is invalid. - """ - if pkt_recv[Ether].src != src_mac: - raise RuntimeError( - f"Received frame has invalid source MAC address: " - f"{pkt_recv[Ether].src} should be: {src_mac}" - ) - - if pkt_recv[Ether].dst != dst_mac: - raise RuntimeError( - f"Received frame has invalid destination MAC address: " - f"{pkt_recv[Ether].dst} should be: {dst_mac}" - ) - - if not pkt_recv.haslayer(IPv6): - raise RuntimeError( - f"Not an {IPv6.name} packet received: {pkt_recv!r}" - ) - - if pkt_recv[IPv6].dst != dst_ip: - raise RuntimeError( - f"Received packet has invalid destination address: " - f"{pkt_recv[IPv6.name].dst} should be: {dst_ip}" - ) - - if pkt_recv[IPv6].src != src_ip: - raise RuntimeError( - f"Received packet has invalid destination address: " - f"{pkt_recv[IPv6.name].dst} should be: {src_ip}" - ) - - if pkt_recv[IPv6].nh != 59: # ipv6nh[59] == No Next Header - raise RuntimeError( - f"Received IPv6 packet has invalid next header: " - f"{IPv6.nh} should be: 59 ({ipv6nh[59]})" - ) - - -def main(): - """Send, receive and check IPv6 and IPv6ExtHdrSegmentRouting packets.""" - - args = TrafficScriptArg( - [ - u"tx_src_mac", u"tx_dst_mac", u"rx_src_mac", u"rx_dst_mac", - u"src_ip", u"dst_ip", u"dir0_srcsid", u"dir0_dstsid1", - u"dir0_dstsid2", u"dir1_srcsid", u"dir1_dstsid1", u"dir1_dstsid2", - u"decap", u"dir0_dstsid3", u"dir1_dstsid3", u"static_proxy" - ] - ) - - tx_txq = TxQueue(args.get_arg(u"tx_if")) - tx_rxq = RxQueue(args.get_arg(u"tx_if")) - rx_txq = TxQueue(args.get_arg(u"rx_if")) - rx_rxq = RxQueue(args.get_arg(u"rx_if")) - - tx_src_mac = args.get_arg(u"tx_src_mac") - tx_dst_mac = args.get_arg(u"tx_dst_mac") - rx_src_mac = args.get_arg(u"rx_src_mac") - rx_dst_mac = args.get_arg(u"rx_dst_mac") - src_ip = args.get_arg(u"src_ip") - dst_ip = args.get_arg(u"dst_ip") - - dir0_srcsid = args.get_arg(u"dir0_srcsid") - dir0_dstsid1 = args.get_arg(u"dir0_dstsid1") - dir0_dstsid2 = args.get_arg(u"dir0_dstsid2") - dir1_srcsid = args.get_arg(u"dir1_srcsid") - dir1_dstsid1 = args.get_arg(u"dir1_dstsid1") - dir1_dstsid2 = args.get_arg(u"dir1_dstsid2") - decap = args.get_arg(u"decap") - dir0_dstsid3 = args.get_arg(u"dir0_dstsid3") - dir1_dstsid3 = args.get_arg(u"dir1_dstsid3") - static_proxy = args.get_arg(u"static_proxy") - - ip_pkt = IPv6(src=src_ip, dst=dst_ip) - - sent_packets = list() - tx_pkt_send = (Ether(src=tx_src_mac, dst=tx_dst_mac) / ip_pkt) - tx_pkt_send /= Raw() - size_limit = 78 - if len(tx_pkt_send) < size_limit: - tx_pkt_send[Raw].load += (b"\0" * (size_limit - len(tx_pkt_send))) - sent_packets.append(tx_pkt_send) - tx_txq.send(tx_pkt_send) - - while True: - rx_pkt_recv = rx_rxq.recv(2) - - if rx_pkt_recv is None: - raise RuntimeError(f"{IPv6.name} packet Rx timeout") - - if rx_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 - - check_srv6( - rx_pkt_recv, rx_src_mac, rx_dst_mac, src_ip, dst_ip, dir0_srcsid, - dir0_dstsid1, dir0_dstsid2, dir0_dstsid3, 1 - ) - - ip_pkt = IPv6(src=dst_ip, dst=src_ip) - ip_pkt /= Raw() - if len(ip_pkt) < (size_limit - 14): - ip_pkt[Raw].load += (b"\0" * (size_limit - 14 - len(ip_pkt))) - - rx_pkt_send = ( - Ether(src=rx_dst_mac, dst=rx_src_mac) / - IPv6(src=dir1_srcsid, dst=dir1_dstsid1) / - IPv6ExtHdrSegmentRouting( - segleft=1 if dir1_dstsid3 == u"None" else 2, - lastentry=1 if dir1_dstsid3 == u"None" else 2, - addresses=[dir1_dstsid2, dir1_dstsid1] - if dir1_dstsid3 == u"None" - else [dir1_dstsid3, dir1_dstsid2, dir1_dstsid1] - ) / - ip_pkt - ) if dir1_dstsid2 != u"None" else ( - Ether(src=rx_dst_mac, dst=rx_src_mac) / - IPv6(src=dir1_srcsid, dst=dir1_dstsid1) / - ip_pkt - ) - rx_txq.send(rx_pkt_send) - - while True: - tx_pkt_recv = tx_rxq.recv(2, ignore=sent_packets) - - if tx_pkt_recv is None: - raise RuntimeError(f"{IPv6.name} packet Rx timeout") - - if tx_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 decap == u"True": - check_ip(tx_pkt_recv, tx_dst_mac, tx_src_mac, dst_ip, src_ip) - else: - check_srv6( - tx_pkt_recv, tx_dst_mac, tx_src_mac, dst_ip, src_ip, dir1_srcsid, - dir1_dstsid1, dir1_dstsid2, dir1_dstsid3, 2, - bool(static_proxy == u"True") - ) - - sys.exit(0) - - -if __name__ == u"__main__": - main() |