ligang/vpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
dac97e2c627ca3a911dac7fd8eb268bde23f853f
vpp/test/test_ipsec_nat.py
Klement Sekera d9b0c6fbf7 tests: replace pycodestyle with black 
Drop pycodestyle for code style checking in favor of black. Black is
much faster, stable PEP8 compliant code style checker offering also
automatic formatting. It aims to be very stable and produce smallest
diffs. It's used by many small and big projects.

Running checkstyle with black takes a few seconds with a terse output.
Thus, test-checkstyle-diff is no longer necessary.

Expand scope of checkstyle to all python files in the repo, replacing
test-checkstyle with checkstyle-python.

Also, fixstyle-python is now available for automatic style formatting.

Note: python virtualenv has been consolidated in test/Makefile,
test/requirements*.txt which will eventually be moved to a central
location.  This is required to simply the automated generation of
docker executor images in the CI.

Type: improvement
Change-Id: I022a326603485f58585e879ac0f697fceefbc9c8
Signed-off-by: Klement Sekera <klement.sekera@gmail.com>
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
2022-05-10 18:52:08 +00:00

347 lines
11 KiB
Python
Raw Blame History

#!/usr/bin/env python3
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)
Reference in New Issue View Git Blame Copy Permalink