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-rw-r--r--src/plugins/nat/test/test_nat66.py196
1 files changed, 196 insertions, 0 deletions
diff --git a/src/plugins/nat/test/test_nat66.py b/src/plugins/nat/test/test_nat66.py
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index 00000000000..bd1b50b9ee2
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+++ b/src/plugins/nat/test/test_nat66.py
@@ -0,0 +1,196 @@
+#!/usr/bin/env python3
+
+import ipaddress
+import random
+import socket
+import struct
+import unittest
+from io import BytesIO
+from time import sleep
+
+import scapy.compat
+from framework import VppTestCase, VppTestRunner, running_extended_tests
+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 MethodHolder(VppTestCase):
+ """ NAT create capture and verify method holder """
+ @property
+ def config_flags(self):
+ return VppEnum.vl_api_nat_config_flags_t
+
+
+class TestNAT66(MethodHolder):
+ """ 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()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestNAT66, cls).tearDownClass()
+
+ 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
+
+ def clear_nat66(self):
+ """
+ Clear NAT66 configuration.
+ """
+ interfaces = self.vapi.nat66_interface_dump()
+ for intf in interfaces:
+ self.vapi.nat66_add_del_interface(is_add=0, flags=intf.flags,
+ sw_if_index=intf.sw_if_index)
+
+ static_mappings = self.vapi.nat66_static_mapping_dump()
+ for sm in static_mappings:
+ self.vapi.nat66_add_del_static_mapping(
+ local_ip_address=sm.local_ip_address,
+ external_ip_address=sm.external_ip_address, vrf_id=sm.vrf_id,
+ is_add=0)
+
+ def tearDown(self):
+ super(TestNAT66, self).tearDown()
+ self.clear_nat66()
+
+ def show_commands_at_teardown(self):
+ self.logger.info(self.vapi.cli("show nat66 interfaces"))
+ self.logger.info(self.vapi.cli("show nat66 static mappings"))
+
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)