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#!/usr/bin/env python3
import ipaddress
import random
import socket
import struct
import unittest
from io import BytesIO
import scapy.compat
from framework import VppTestCase, VppTestRunner
from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder
from scapy.all import bind_layers, Packet, ByteEnumField, ShortField, \
IPField, IntField, LongField, XByteField, FlagsField, FieldLenField, \
PacketListField
from scapy.data import IP_PROTOS
from scapy.layers.inet import IP, TCP, UDP, ICMP
from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6, IPv6ExtHdrFragment
from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply, \
ICMPv6ND_NS, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr, fragment6
from scapy.layers.l2 import Ether, ARP, GRE
from scapy.packet import Raw
from syslog_rfc5424_parser import SyslogMessage, ParseError
from syslog_rfc5424_parser.constants import SyslogSeverity
from util import ip4_range
from util import ppc, ppp
from vpp_acl import AclRule, VppAcl, VppAclInterface
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_neighbor import VppNeighbor
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)
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