+++ /dev/null
-#!/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 ICMP/ICMPv6 packet out one interface, receives
-a LISPGPE-encapsulated packet on the other interface and verifies received
-packet.
-"""
-
-import sys
-import ipaddress
-
-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.all import bind_layers, Packet
-from scapy.fields import FlagsField, BitField, XBitField, IntField
-
-from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
-from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-
-
-class LispGPEHeader(Packet):
- """Scapy header for the Lisp GPE Layer."""
- name = "Lisp GPE Header"
- fields_desc = [
- FlagsField("flags", None, 8, ["N", "L", "E", "V", "I", "P", "R", "O"]),
- BitField("version", 0, size=2),
- BitField("reserved", 0, size=14),
- XBitField("next_protocol", 0, size=8),
- IntField("instance_id/locator_status_bits", 0)]
-
- def guess_payload_class(self, payload):
- protocol = {
- 0x1: LispGPEInnerIP,
- 0x2: LispGPEInnerIPv6,
- 0x3: LispGPEInnerEther,
- 0x4: LispGPEInnerNSH
- }
- return protocol[self.next_protocol]
-
-
-class LispGPEInnerIP(IP):
- """Scapy inner LISP GPE layer for IPv4-in-IPv4."""
- name = "Lisp GPE Inner Layer - IPv4"
-
-
-class LispGPEInnerIPv6(IPv6):
- """Scapy inner LISP GPE layer for IPv6-in-IPv6."""
- name = "Lisp GPE Inner Layer - IPv6"
-
-
-class LispGPEInnerEther(Ether):
- """Scapy inner LISP GPE layer for Lisp-L2."""
- name = "Lisp GPE Inner Layer - Ethernet"
-
-
-class LispGPEInnerNSH(Packet):
- """Scapy inner LISP GPE layer for Lisp-NSH.
-
- Parsing not implemented.
- """
-
-
-def valid_ipv4(ip):
- try:
- ipaddress.IPv4Address(unicode(ip))
- return True
- except (AttributeError, ipaddress.AddressValueError):
- return False
-
-
-def valid_ipv6(ip):
- try:
- ipaddress.IPv6Address(unicode(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(
- ['tg_src_mac', 'tg_dst_mac', 'src_ip', 'dst_ip', 'dut_if1_mac',
- 'dut_if2_mac', 'src_rloc', 'dst_rloc'],
- ['ot_mode'])
-
- tx_src_mac = args.get_arg('tg_src_mac')
- tx_dst_mac = args.get_arg('dut_if1_mac')
- rx_dst_mac = args.get_arg('tg_dst_mac')
- rx_src_mac = args.get_arg('dut_if2_mac')
- src_ip = args.get_arg('src_ip')
- dst_ip = args.get_arg('dst_ip')
- src_rloc = args.get_arg("src_rloc")
- dst_rloc = args.get_arg("dst_rloc")
- tx_if = args.get_arg('tx_if')
- rx_if = args.get_arg('rx_if')
- ot_mode = args.get_arg('ot_mode')
-
- rxq = RxQueue(rx_if)
- txq = TxQueue(tx_if)
- sent_packets = []
- 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
- 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
- else:
- raise ValueError("IP not in correct format")
-
- bind_layers(UDP, LispGPEHeader, dport=4341)
-
- 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("ICMP echo Rx timeout")
-
- if rx_dst_mac == ether[Ether].dst and rx_src_mac == ether[Ether].src:
- print("MAC addresses match.")
- else:
- raise RuntimeError(
- "Matching packet unsuccessful: {0}".format(ether.__repr__()))
-
- ip = ether.payload
-
- if ot_mode == '6to4':
- if not isinstance(ip, IP):
- raise RuntimeError(
- "Not an IP packet received {0}".format(ip.__repr__()))
- elif ot_mode == '4to6':
- if not isinstance(ip, IPv6):
- raise RuntimeError(
- "Not an IP packet received {0}".format(ip.__repr__()))
- elif not isinstance(ip, ip_format):
- raise RuntimeError(
- "Not an IP packet received {0}".format(ip.__repr__()))
-
- lisp = ether.getlayer(LispGPEHeader).underlayer
- if not lisp:
- raise RuntimeError("Lisp layer not present or parsing failed.")
-
- # Compare data from packets
- if src_ip == lisp.src:
- print("Source IP matches source EID.")
- else:
- raise RuntimeError("Matching Src IP unsuccessful: {} != {}"
- .format(src_ip, lisp.src))
-
- if dst_ip == lisp.dst:
- print("Destination IP matches destination EID.")
- else:
- raise RuntimeError("Matching Dst IP unsuccessful: {} != {}"
- .format(dst_ip, lisp.dst))
-
- if src_rloc == ip.src:
- print("Source RLOC matches configuration.")
- else:
- raise RuntimeError("Matching Src RLOC unsuccessful: {} != {}"
- .format(src_rloc, ip.src))
-
- if dst_rloc == ip.dst:
- print("Destination RLOC matches configuration.")
- else:
- raise RuntimeError("Matching dst RLOC unsuccessful: {} != {}"
- .format(dst_rloc, ip.dst))
-
- sys.exit(0)
-
-
-if __name__ == "__main__":
- main()
Code Review / csit.git / blobdiff