+++ /dev/null
-#!/usr/bin/env python
-
-# 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
-
-# pylint: disable=no-name-in-module
-# pylint: disable=import-error
-logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
-
-from scapy.all import Ether
-from scapy.layers.inet import IP
-from scapy.layers.inet6 import IPv6, ICMPv6ND_NS
-from scapy.layers.ipsec import SecurityAssociation, ESP
-from ipaddress import ip_address
-
-from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
-from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
-
-
-def check_ipsec(pkt_recv, ip_layer, dst_tun, src_ip, dst_ip, sa_in):
- """Check received IPsec packet.
-
- :param pkt_recv: Received packet to verify.
- :param ip_layer: Scapy IP layer.
- :param dst_tun: IPsec tunnel destination 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 sa_in: IPsec SA for packet decryption.
- :type pkt_recv: scapy.Ether
- :type ip_layer: scapy.layers.inet.IP or scapy.layers.inet6.IPv6
- :type dst_tun: str
- :type src_ip: str
- :type dst_ip: str
- :type sa_in: scapy.layers.ipsec.SecurityAssociation
- :raises RuntimeError: If received packet is invalid.
- """
- if not pkt_recv.haslayer(ip_layer):
- raise RuntimeError('Not an {ip} packet received: {pkt}'.format(
- ip=ip_layer.name, pkt=pkt_recv.__repr__()))
-
- if pkt_recv[ip_layer.name].dst != dst_tun:
- raise RuntimeError(
- 'Received packet has invalid destination address: {rec_ip} '
- 'should be: {exp_ip}'.format(
- rec_ip=pkt_recv[ip_layer.name].dst, exp_ip=dst_tun))
-
- if not pkt_recv.haslayer(ESP):
- raise RuntimeError(
- 'Not an ESP packet received: {pkt}'.format(pkt=pkt_recv.__repr__()))
-
- ip_pkt = pkt_recv[ip_layer]
- d_pkt = sa_in.decrypt(ip_pkt)
-
- if d_pkt[ip_layer].dst != dst_ip:
- raise RuntimeError(
- 'Decrypted packet has invalid destination address: {rec_ip} '
- 'should be: {exp_ip}'.format(
- rec_ip=d_pkt[ip_layer].dst, exp_ip=dst_ip))
-
- if d_pkt[ip_layer].src != src_ip:
- raise RuntimeError(
- 'Decrypted packet has invalid source address: {rec_ip} should be: '
- '{exp_ip}'.format(rec_ip=d_pkt[ip_layer].src, exp_ip=src_ip))
-
- if ip_layer == IP and d_pkt[ip_layer.name].proto != 61:
- raise RuntimeError(
- 'Decrypted packet has invalid IP protocol: {rec_proto} '
- 'should be: 61'.format(rec_proto=d_pkt[ip_layer.name].proto))
-
-
-def check_ip(pkt_recv, ip_layer, src_ip, dst_ip):
- """Check received IP/IPv6 packet.
-
- :param pkt_recv: Received packet to verify.
- :param ip_layer: Scapy IP layer.
- :param src_ip: Source IP/IPv6 address.
- :param dst_ip: Destination IP/IPv6 address.
- :type pkt_recv: scapy.Ether
- :type ip_layer: scapy.layers.inet.IP or scapy.layers.inet6.IPv6
- :type src_ip: str
- :type dst_ip: str
- :raises RuntimeError: If received packet is invalid.
- """
- if not pkt_recv.haslayer(ip_layer):
- raise RuntimeError('Not an {ip} packet received: {pkt}'.format(
- ip=ip_layer.name, pkt=pkt_recv.__repr__()))
-
- if pkt_recv[ip_layer.name].dst != dst_ip:
- raise RuntimeError(
- 'Received packet has invalid destination address: {rec_ip} '
- 'should be: {exp_ip}'.format(
- rec_ip=pkt_recv[ip_layer.name].dst, exp_ip=dst_ip))
-
- if pkt_recv[ip_layer.name].src != src_ip:
- raise RuntimeError(
- 'Received packet has invalid destination address: {rec_ip} '
- 'should be: {exp_ip}'.format(
- rec_ip=pkt_recv[ip_layer.name].dst, exp_ip=src_ip))
-
- if ip_layer == IP and pkt_recv[ip_layer.name].proto != 61:
- raise RuntimeError(
- 'Received packet has invalid IP protocol: {rec_proto} '
- 'should be: 61'.format(rec_proto=pkt_recv[ip_layer.name].proto))
-
-
-# pylint: disable=too-many-locals
-# pylint: disable=too-many-statements
-def main():
- """Send and receive IPsec packet."""
-
- args = TrafficScriptArg(
- ['tx_src_mac', 'tx_dst_mac', 'rx_src_mac', 'rx_dst_mac', 'src_ip',
- 'dst_ip','crypto_alg', 'crypto_key', 'integ_alg', 'integ_key',
- 'l_spi', 'r_spi'],
- ['src_tun', 'dst_tun']
- )
-
- tx_txq = TxQueue(args.get_arg('tx_if'))
- tx_rxq = RxQueue(args.get_arg('tx_if'))
- rx_txq = TxQueue(args.get_arg('rx_if'))
- rx_rxq = RxQueue(args.get_arg('rx_if'))
-
- tx_src_mac = args.get_arg('tx_src_mac')
- tx_dst_mac = args.get_arg('tx_dst_mac')
- rx_src_mac = args.get_arg('rx_src_mac')
- rx_dst_mac = args.get_arg('rx_dst_mac')
- src_ip = args.get_arg('src_ip')
- dst_ip = args.get_arg('dst_ip')
- crypto_alg = args.get_arg('crypto_alg')
- crypto_key = args.get_arg('crypto_key')
- integ_alg = args.get_arg('integ_alg')
- integ_key = args.get_arg('integ_key')
- l_spi = int(args.get_arg('l_spi'))
- r_spi = int(args.get_arg('r_spi'))
- src_tun = args.get_arg('src_tun')
- dst_tun = args.get_arg('dst_tun')
-
- if ip_address(unicode(src_ip)).version == 6:
- ip_layer = IPv6
- else:
- ip_layer = IP
-
- tunnel_out = ip_layer(src=src_tun, dst=dst_tun) if src_tun and dst_tun \
- else None
- tunnel_in = ip_layer(src=dst_tun, dst=src_tun) if src_tun and dst_tun \
- else None
-
- if not (src_tun and dst_tun):
- src_tun = src_ip
-
- sa_in = SecurityAssociation(ESP, spi=r_spi, crypt_algo=crypto_alg,
- crypt_key=crypto_key, auth_algo=integ_alg,
- auth_key=integ_key, tunnel_header=tunnel_in)
-
- sa_out = SecurityAssociation(ESP, spi=l_spi, crypt_algo=crypto_alg,
- crypt_key=crypto_key, auth_algo=integ_alg,
- auth_key=integ_key, tunnel_header=tunnel_out)
-
- ip_pkt = ip_layer(src=src_ip, dst=dst_ip, proto=61) if ip_layer == IP \
- else ip_layer(src=src_ip, dst=dst_ip)
- ip_pkt = ip_layer(str(ip_pkt))
-
- e_pkt = sa_out.encrypt(ip_pkt)
- tx_pkt_send = (Ether(src=tx_src_mac, dst=tx_dst_mac) /
- e_pkt)
-
- sent_packets = list()
- 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(
- '{ip} packet Rx timeout'.format(ip=ip_layer.name))
-
- 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_ip(rx_pkt_recv, ip_layer, src_ip, dst_ip)
-
- rx_ip_pkt = ip_layer(src=dst_ip, dst=src_ip, proto=61) if ip_layer == IP \
- else ip_layer(src=dst_ip, dst=src_ip)
- rx_pkt_send = (Ether(src=rx_dst_mac, dst=rx_src_mac) /
- rx_ip_pkt)
-
- rx_txq.send(rx_pkt_send)
-
- while True:
- tx_pkt_recv = tx_rxq.recv(2, sent_packets)
-
- if tx_pkt_recv is None:
- raise RuntimeError('ESP 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_ipsec(tx_pkt_recv, ip_layer, src_tun, dst_ip, src_ip, sa_in)
-
- sys.exit(0)
-
-
-if __name__ == "__main__":
- main()
Code Review / csit.git / blobdiff