+++ /dev/null
-#!/usr/bin/env python
-
-import socket
-
-import scapy.compat
-from scapy.layers.l2 import Ether
-from scapy.layers.inet import ICMP, IP, TCP, UDP
-from scapy.layers.ipsec import SecurityAssociation, ESP
-
-from util import ppp, ppc
-from template_ipsec import TemplateIpsec
-from vpp_ipsec import VppIpsecSA, VppIpsecSpd, VppIpsecSpdEntry,\
- VppIpsecSpdItfBinding
-from vpp_ip_route import VppIpRoute, VppRoutePath
-from vpp_ip import DpoProto
-from vpp_papi import VppEnum
-
-
-class IPSecNATTestCase(TemplateIpsec):
- """ IPSec/NAT
- TUNNEL MODE:
-
-
- public network | private network
- --- encrypt --- plain ---
- |pg0| <------- |VPP| <------ |pg1|
- --- --- ---
-
- --- decrypt --- plain ---
- |pg0| -------> |VPP| ------> |pg1|
- --- --- ---
- """
-
- tcp_port_in = 6303
- tcp_port_out = 6303
- udp_port_in = 6304
- udp_port_out = 6304
- icmp_id_in = 6305
- icmp_id_out = 6305
-
- @classmethod
- def setUpClass(cls):
- super(IPSecNATTestCase, cls).setUpClass()
-
- @classmethod
- def tearDownClass(cls):
- super(IPSecNATTestCase, cls).tearDownClass()
-
- def setUp(self):
- super(IPSecNATTestCase, self).setUp()
- self.tun_if = self.pg0
-
- self.tun_spd = VppIpsecSpd(self, self.tun_spd_id)
- self.tun_spd.add_vpp_config()
- VppIpsecSpdItfBinding(self, self.tun_spd,
- self.tun_if).add_vpp_config()
-
- p = self.ipv4_params
- self.config_esp_tun(p)
- self.logger.info(self.vapi.ppcli("show ipsec all"))
-
- d = DpoProto.DPO_PROTO_IP6 if p.is_ipv6 else DpoProto.DPO_PROTO_IP4
- VppIpRoute(self, p.remote_tun_if_host, p.addr_len,
- [VppRoutePath(self.tun_if.remote_addr[p.addr_type],
- 0xffffffff,
- proto=d)]).add_vpp_config()
-
- def tearDown(self):
- super(IPSecNATTestCase, self).tearDown()
-
- def create_stream_plain(self, src_mac, dst_mac, src_ip, dst_ip):
- return [
- # TCP
- Ether(src=src_mac, dst=dst_mac) /
- IP(src=src_ip, dst=dst_ip) /
- TCP(sport=self.tcp_port_in, dport=20),
- # UDP
- Ether(src=src_mac, dst=dst_mac) /
- IP(src=src_ip, dst=dst_ip) /
- UDP(sport=self.udp_port_in, dport=20),
- # ICMP
- Ether(src=src_mac, dst=dst_mac) /
- IP(src=src_ip, dst=dst_ip) /
- ICMP(id=self.icmp_id_in, type='echo-request')
- ]
-
- def create_stream_encrypted(self, src_mac, dst_mac, src_ip, dst_ip, sa):
- return [
- # TCP
- Ether(src=src_mac, dst=dst_mac) /
- sa.encrypt(IP(src=src_ip, dst=dst_ip) /
- TCP(dport=self.tcp_port_out, sport=20)),
- # UDP
- Ether(src=src_mac, dst=dst_mac) /
- sa.encrypt(IP(src=src_ip, dst=dst_ip) /
- UDP(dport=self.udp_port_out, sport=20)),
- # ICMP
- Ether(src=src_mac, dst=dst_mac) /
- sa.encrypt(IP(src=src_ip, dst=dst_ip) /
- ICMP(id=self.icmp_id_out, type='echo-request'))
- ]
-
- def verify_capture_plain(self, capture):
- for packet in capture:
- try:
- self.assert_packet_checksums_valid(packet)
- self.assert_equal(packet[IP].src, self.tun_if.remote_ip4,
- "decrypted packet source address")
- self.assert_equal(packet[IP].dst, self.pg1.remote_ip4,
- "decrypted packet destination address")
- if packet.haslayer(TCP):
- self.assertFalse(
- packet.haslayer(UDP),
- "unexpected UDP header in decrypted packet")
- self.assert_equal(packet[TCP].dport, self.tcp_port_in,
- "decrypted packet TCP destination port")
- elif packet.haslayer(UDP):
- if packet[UDP].payload:
- self.assertFalse(
- packet[UDP][1].haslayer(UDP),
- "unexpected UDP header in decrypted packet")
- self.assert_equal(packet[UDP].dport, self.udp_port_in,
- "decrypted packet UDP destination port")
- else:
- self.assertFalse(
- packet.haslayer(UDP),
- "unexpected UDP header in decrypted packet")
- self.assert_equal(packet[ICMP].id, self.icmp_id_in,
- "decrypted packet ICMP ID")
- except Exception:
- self.logger.error(
- ppp("Unexpected or invalid plain packet:", packet))
- raise
-
- def verify_capture_encrypted(self, capture, sa):
- for packet in capture:
- try:
- copy = packet.__class__(scapy.compat.raw(packet))
- del copy[UDP].len
- copy = packet.__class__(scapy.compat.raw(copy))
- self.assert_equal(packet[UDP].len, copy[UDP].len,
- "UDP header length")
- self.assert_packet_checksums_valid(packet)
- self.assertIn(ESP, packet[IP])
- decrypt_pkt = sa.decrypt(packet[IP])
- self.assert_packet_checksums_valid(decrypt_pkt)
- self.assert_equal(decrypt_pkt[IP].src, self.pg1.remote_ip4,
- "encrypted packet source address")
- self.assert_equal(decrypt_pkt[IP].dst, self.tun_if.remote_ip4,
- "encrypted packet destination address")
- except Exception:
- self.logger.error(
- ppp("Unexpected or invalid encrypted packet:", packet))
- raise
-
- def config_esp_tun(self, params):
- addr_type = params.addr_type
- scapy_tun_sa_id = params.scapy_tun_sa_id
- scapy_tun_spi = params.scapy_tun_spi
- vpp_tun_sa_id = params.vpp_tun_sa_id
- vpp_tun_spi = params.vpp_tun_spi
- auth_algo_vpp_id = params.auth_algo_vpp_id
- auth_key = params.auth_key
- crypt_algo_vpp_id = params.crypt_algo_vpp_id
- crypt_key = params.crypt_key
- addr_any = params.addr_any
- addr_bcast = params.addr_bcast
- flags = (VppEnum.vl_api_ipsec_sad_flags_t.
- IPSEC_API_SAD_FLAG_UDP_ENCAP)
- e = VppEnum.vl_api_ipsec_spd_action_t
-
- VppIpsecSA(self, scapy_tun_sa_id, scapy_tun_spi,
- auth_algo_vpp_id, auth_key,
- crypt_algo_vpp_id, crypt_key,
- self.vpp_esp_protocol,
- self.pg1.remote_addr[addr_type],
- self.tun_if.remote_addr[addr_type],
- flags=flags).add_vpp_config()
- VppIpsecSA(self, vpp_tun_sa_id, vpp_tun_spi,
- auth_algo_vpp_id, auth_key,
- crypt_algo_vpp_id, crypt_key,
- self.vpp_esp_protocol,
- self.tun_if.remote_addr[addr_type],
- self.pg1.remote_addr[addr_type],
- flags=flags).add_vpp_config()
-
- VppIpsecSpdEntry(self, self.tun_spd, scapy_tun_sa_id,
- addr_any, addr_bcast,
- addr_any, addr_bcast,
- socket.IPPROTO_ESP).add_vpp_config()
- VppIpsecSpdEntry(self, self.tun_spd, scapy_tun_sa_id,
- addr_any, addr_bcast,
- addr_any, addr_bcast,
- socket.IPPROTO_ESP,
- is_outbound=0).add_vpp_config()
- VppIpsecSpdEntry(self, self.tun_spd, scapy_tun_sa_id,
- addr_any, addr_bcast,
- addr_any, addr_bcast,
- socket.IPPROTO_UDP,
- remote_port_start=4500,
- remote_port_stop=4500).add_vpp_config()
- VppIpsecSpdEntry(self, self.tun_spd, scapy_tun_sa_id,
- addr_any, addr_bcast,
- addr_any, addr_bcast,
- socket.IPPROTO_UDP,
- remote_port_start=4500,
- remote_port_stop=4500,
- is_outbound=0).add_vpp_config()
- VppIpsecSpdEntry(self, self.tun_spd, vpp_tun_sa_id,
- self.tun_if.remote_addr[addr_type],
- self.tun_if.remote_addr[addr_type],
- self.pg1.remote_addr[addr_type],
- self.pg1.remote_addr[addr_type],
- 0, priority=10,
- policy=e.IPSEC_API_SPD_ACTION_PROTECT,
- is_outbound=0).add_vpp_config()
- VppIpsecSpdEntry(self, self.tun_spd, scapy_tun_sa_id,
- self.pg1.remote_addr[addr_type],
- self.pg1.remote_addr[addr_type],
- self.tun_if.remote_addr[addr_type],
- self.tun_if.remote_addr[addr_type],
- 0, policy=e.IPSEC_API_SPD_ACTION_PROTECT,
- priority=10).add_vpp_config()
-
- def test_ipsec_nat_tun(self):
- """ IPSec/NAT tunnel test case """
- p = self.ipv4_params
- scapy_tun_sa = SecurityAssociation(ESP, spi=p.scapy_tun_spi,
- crypt_algo=p.crypt_algo,
- crypt_key=p.crypt_key,
- auth_algo=p.auth_algo,
- auth_key=p.auth_key,
- tunnel_header=IP(
- src=self.pg1.remote_ip4,
- dst=self.tun_if.remote_ip4),
- nat_t_header=UDP(
- sport=4500,
- dport=4500))
- # in2out - from private network to public
- pkts = self.create_stream_plain(
- self.pg1.remote_mac, self.pg1.local_mac,
- self.pg1.remote_ip4, self.tun_if.remote_ip4)
- self.pg1.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.tun_if.get_capture(len(pkts))
- self.verify_capture_encrypted(capture, scapy_tun_sa)
-
- vpp_tun_sa = SecurityAssociation(ESP,
- spi=p.vpp_tun_spi,
- crypt_algo=p.crypt_algo,
- crypt_key=p.crypt_key,
- auth_algo=p.auth_algo,
- auth_key=p.auth_key,
- tunnel_header=IP(
- src=self.tun_if.remote_ip4,
- dst=self.pg1.remote_ip4),
- nat_t_header=UDP(
- sport=4500,
- dport=4500))
-
- # out2in - from public network to private
- pkts = self.create_stream_encrypted(
- self.tun_if.remote_mac, self.tun_if.local_mac,
- self.tun_if.remote_ip4, self.pg1.remote_ip4, vpp_tun_sa)
- self.logger.info(ppc("Sending packets:", pkts))
- self.tun_if.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg1.get_capture(len(pkts))
- self.verify_capture_plain(capture)
Code Review / vpp.git / blobdiff