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#!/usr/bin/env python3
import unittest
from framework import VppTestCase
from asfframework import VppTestRunner
from scapy.layers.inet import IP, TCP, UDP
from scapy.layers.inet6 import (
IPv6,
ICMPv6EchoRequest,
ICMPv6EchoReply,
)
from scapy.layers.l2 import Ether, GRE
from util import ppp
from vpp_papi import VppEnum
class TestNAT66(VppTestCase):
"""NAT66 Test Cases"""
@classmethod
def setUpClass(cls):
super(TestNAT66, cls).setUpClass()
cls.nat_addr = "fd01:ff::2"
cls.create_pg_interfaces(range(2))
cls.interfaces = list(cls.pg_interfaces)
for i in cls.interfaces:
i.admin_up()
i.config_ip6()
i.configure_ipv6_neighbors()
@property
def config_flags(self):
return VppEnum.vl_api_nat_config_flags_t
def plugin_enable(self):
self.vapi.nat66_plugin_enable_disable(enable=1)
def plugin_disable(self):
self.vapi.nat66_plugin_enable_disable(enable=0)
def setUp(self):
super(TestNAT66, self).setUp()
self.plugin_enable()
def tearDown(self):
super(TestNAT66, self).tearDown()
if not self.vpp_dead:
self.plugin_disable()
def test_static(self):
"""1:1 NAT66 test"""
flags = self.config_flags.NAT_IS_INSIDE
self.vapi.nat66_add_del_interface(
is_add=1, flags=flags, sw_if_index=self.pg0.sw_if_index
)
self.vapi.nat66_add_del_interface(is_add=1, sw_if_index=self.pg1.sw_if_index)
self.vapi.nat66_add_del_static_mapping(
local_ip_address=self.pg0.remote_ip6,
external_ip_address=self.nat_addr,
is_add=1,
)
# in2out
pkts = []
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6)
/ TCP()
)
pkts.append(p)
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6)
/ UDP()
)
pkts.append(p)
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6)
/ ICMPv6EchoRequest()
)
pkts.append(p)
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6)
/ GRE()
/ IP()
/ TCP()
)
pkts.append(p)
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(len(pkts))
for packet in capture:
try:
self.assertEqual(packet[IPv6].src, self.nat_addr)
self.assertEqual(packet[IPv6].dst, self.pg1.remote_ip6)
self.assert_packet_checksums_valid(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
# out2in
pkts = []
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr)
/ TCP()
)
pkts.append(p)
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr)
/ UDP()
)
pkts.append(p)
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr)
/ ICMPv6EchoReply()
)
pkts.append(p)
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr)
/ GRE()
/ IP()
/ TCP()
)
pkts.append(p)
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg0.get_capture(len(pkts))
for packet in capture:
try:
self.assertEqual(packet[IPv6].src, self.pg1.remote_ip6)
self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6)
self.assert_packet_checksums_valid(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
sm = self.vapi.nat66_static_mapping_dump()
self.assertEqual(len(sm), 1)
self.assertEqual(sm[0].total_pkts, 8)
def test_check_no_translate(self):
"""NAT66 translate only when egress interface is outside interface"""
flags = self.config_flags.NAT_IS_INSIDE
self.vapi.nat66_add_del_interface(
is_add=1, flags=flags, sw_if_index=self.pg0.sw_if_index
)
self.vapi.nat66_add_del_interface(
is_add=1, flags=flags, sw_if_index=self.pg1.sw_if_index
)
self.vapi.nat66_add_del_static_mapping(
local_ip_address=self.pg0.remote_ip6,
external_ip_address=self.nat_addr,
is_add=1,
)
# in2out
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6)
/ UDP()
)
self.pg0.add_stream([p])
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
packet = capture[0]
try:
self.assertEqual(packet[IPv6].src, self.pg0.remote_ip6)
self.assertEqual(packet[IPv6].dst, self.pg1.remote_ip6)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
if __name__ == "__main__":
unittest.main(testRunner=VppTestRunner)
|
