+++ /dev/null
-#!/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 that sends an ICMP/ICMPv6 packet out one interface, receives
-a LISP-encapsulated packet on the other interface and verifies received packet.
-"""
-
-import sys
-import ipaddress
-
-from scapy.all import bind_layers, Packet
-from scapy.fields import FlagsField, BitField, IntField
-from scapy.layers.inet import ICMP, IP, UDP
-from scapy.layers.inet6 import ICMPv6EchoRequest
-from scapy.layers.inet6 import IPv6
-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
-
-
-class LispHeader(Packet):
- """Scapy header for the LISP Layer."""
-
- name = u"Lisp Header"
- fields_desc = [
- FlagsField(
- u"flags", None, 8, [u"N", u"L", u"E", u"V", u"I", u"", u"", u""]
- ),
- BitField(u"nonce/map_version", 0, size=24),
- IntField(u"instance_id/locator_status_bits", 0)]
-
-
-class LispInnerIP(IP):
- """Scapy inner LISP layer for IPv4-in-IPv4."""
-
- name = u"Lisp Inner Layer - IPv4"
-
-
-class LispInnerIPv6(IPv6):
- """Scapy inner LISP layer for IPv6-in-IPv6."""
-
- name = u"Lisp Inner Layer - IPv6"
-
-
-def valid_ipv4(ip):
- try:
- ipaddress.IPv4Address(ip)
- return True
- except (AttributeError, ipaddress.AddressValueError):
- return False
-
-
-def valid_ipv6(ip):
- try:
- ipaddress.IPv6Address(ip)
- return True
- except (AttributeError, ipaddress.AddressValueError):
- return False
-
-
-def main():
- """Send IP ICMP packet from one traffic generator interface to the other.
-
- :raises RuntimeError: If the received packet is not correct."""
-
- args = TrafficScriptArg(
- [
- u"tg_src_mac", u"tg_dst_mac", u"src_ip", u"dst_ip", u"dut_if1_mac",
- u"dut_if2_mac", u"src_rloc", u"dst_rloc"
- ],
- [u"ot_mode"]
- )
-
- tx_src_mac = args.get_arg(u"tg_src_mac")
- tx_dst_mac = args.get_arg(u"dut_if1_mac")
- rx_dst_mac = args.get_arg(u"tg_dst_mac")
- rx_src_mac = args.get_arg(u"dut_if2_mac")
- src_ip = args.get_arg(u"src_ip")
- dst_ip = args.get_arg(u"dst_ip")
- src_rloc = args.get_arg(u"src_rloc")
- dst_rloc = args.get_arg(u"dst_rloc")
- tx_if = args.get_arg(u"tx_if")
- rx_if = args.get_arg(u"rx_if")
- ot_mode = args.get_arg(u"ot_mode")
-
- rxq = RxQueue(rx_if)
- txq = TxQueue(tx_if)
-
- pkt_raw = Ether(src=tx_src_mac, dst=tx_dst_mac)
-
- if valid_ipv4(src_ip) and valid_ipv4(dst_ip):
- pkt_raw /= IP(src=src_ip, dst=dst_ip)
- pkt_raw /= ICMP()
- ip_format = IP
- lisp_layer = LispInnerIP
- elif valid_ipv6(src_ip) and valid_ipv6(dst_ip):
- pkt_raw /= IPv6(src=src_ip, dst=dst_ip)
- pkt_raw /= ICMPv6EchoRequest()
- ip_format = IPv6
- lisp_layer = LispInnerIPv6
- else:
- raise ValueError(u"IP not in correct format")
-
- bind_layers(UDP, LispHeader, dport=4341)
- bind_layers(LispHeader, lisp_layer)
-
- pkt_raw /= Raw()
- sent_packets = list()
- sent_packets.append(pkt_raw)
- txq.send(pkt_raw)
-
- if tx_if == rx_if:
- ether = rxq.recv(2, ignore=sent_packets)
- else:
- ether = rxq.recv(2)
-
- if ether is None:
- raise RuntimeError(u"ICMP echo Rx timeout")
-
- if rx_dst_mac == ether[Ether].dst and rx_src_mac == ether[Ether].src:
- print(u"MAC addresses match.")
- else:
- raise RuntimeError(f"Matching packet unsuccessful: {ether!r}")
-
- ip = ether.payload
-
- if ot_mode == u"6to4":
- if not isinstance(ip, IP):
- raise RuntimeError(f"Not an IP packet received {ip!r}")
- elif ot_mode == u"4to6":
- if not isinstance(ip, IPv6):
- raise RuntimeError(f"Not an IP packet received {ip!r}")
- elif not isinstance(ip, ip_format):
- raise RuntimeError(f"Not an IP packet received {ip!r}")
-
- lisp = ether.getlayer(lisp_layer)
- if not lisp:
- raise RuntimeError("Lisp layer not present or parsing failed.")
-
- # Compare data from packets
- if src_ip == lisp.src:
- print(u"Source IP matches source EID.")
- else:
- raise RuntimeError(
- f"Matching Src IP unsuccessful: {src_ip} != {lisp.src}"
- )
-
- if dst_ip == lisp.dst:
- print(u"Destination IP matches destination EID.")
- else:
- raise RuntimeError(
- f"Matching Dst IP unsuccessful: {dst_ip} != {lisp.dst}"
- )
-
- if src_rloc == ip.src:
- print(u"Source RLOC matches configuration.")
- else:
- raise RuntimeError(
- f"Matching Src RLOC unsuccessful: {src_rloc} != {ip.src}"
- )
-
- if dst_rloc == ip.dst:
- print(u"Destination RLOC matches configuration.")
- else:
- raise RuntimeError(
- f"Matching dst RLOC unsuccessful: {dst_rloc} != {ip.dst}"
- )
-
- sys.exit(0)
-
-
-if __name__ == u"__main__":
- main()
Code Review / csit.git / blobdiff