#!/usr/bin/env python import socket import unittest import struct from framework import VppTestCase, VppTestRunner, running_extended_tests from scapy.layers.inet import IP, TCP, UDP, ICMP from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6 from scapy.layers.l2 import Ether, ARP, GRE from scapy.data import IP_PROTOS from scapy.packet import bind_layers from util import ppp from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder from time import sleep class MethodHolder(VppTestCase): """ NAT create capture and verify method holder """ @classmethod def setUpClass(cls): super(MethodHolder, cls).setUpClass() def tearDown(self): super(MethodHolder, self).tearDown() def check_ip_checksum(self, pkt): """ Check IP checksum of the packet :param pkt: Packet to check IP checksum """ new = pkt.__class__(str(pkt)) del new['IP'].chksum new = new.__class__(str(new)) self.assertEqual(new['IP'].chksum, pkt['IP'].chksum) def check_tcp_checksum(self, pkt): """ Check TCP checksum in IP packet :param pkt: Packet to check TCP checksum """ new = pkt.__class__(str(pkt)) del new['TCP'].chksum new = new.__class__(str(new)) self.assertEqual(new['TCP'].chksum, pkt['TCP'].chksum) def check_udp_checksum(self, pkt): """ Check UDP checksum in IP packet :param pkt: Packet to check UDP checksum """ new = pkt.__class__(str(pkt)) del new['UDP'].chksum new = new.__class__(str(new)) self.assertEqual(new['UDP'].chksum, pkt['UDP'].chksum) def check_icmp_errror_embedded(self, pkt): """ Check ICMP error embeded packet checksum :param pkt: Packet to check ICMP error embeded packet checksum """ if pkt.haslayer(IPerror): new = pkt.__class__(str(pkt)) del new['IPerror'].chksum new = new.__class__(str(new)) self.assertEqual(new['IPerror'].chksum, pkt['IPerror'].chksum) if pkt.haslayer(TCPerror): new = pkt.__class__(str(pkt)) del new['TCPerror'].chksum new = new.__class__(str(new)) self.assertEqual(new['TCPerror'].chksum, pkt['TCPerror'].chksum) if pkt.haslayer(UDPerror): if pkt['UDPerror'].chksum != 0: new = pkt.__class__(str(pkt)) del new['UDPerror'].chksum new = new.__class__(str(new)) self.assertEqual(new['UDPerror'].chksum, pkt['UDPerror'].chksum) if pkt.haslayer(ICMPerror): del new['ICMPerror'].chksum new = new.__class__(str(new)) self.assertEqual(new['ICMPerror'].chksum, pkt['ICMPerror'].chksum) def check_icmp_checksum(self, pkt): """ Check ICMP checksum in IPv4 packet :param pkt: Packet to check ICMP checksum """ new = pkt.__class__(str(pkt)) del new['ICMP'].chksum new = new.__class__(str(new)) self.assertEqual(new['ICMP'].chksum, pkt['ICMP'].chksum) if pkt.haslayer(IPerror): self.check_icmp_errror_embedded(pkt) def check_icmpv6_checksum(self, pkt): """ Check ICMPv6 checksum in IPv4 packet :param pkt: Packet to check ICMPv6 checksum """ new = pkt.__class__(str(pkt)) if pkt.haslayer(ICMPv6DestUnreach): del new['ICMPv6DestUnreach'].cksum new = new.__class__(str(new)) self.assertEqual(new['ICMPv6DestUnreach'].cksum, pkt['ICMPv6DestUnreach'].cksum) self.check_icmp_errror_embedded(pkt) if pkt.haslayer(ICMPv6EchoRequest): del new['ICMPv6EchoRequest'].cksum new = new.__class__(str(new)) self.assertEqual(new['ICMPv6EchoRequest'].cksum, pkt['ICMPv6EchoRequest'].cksum) if pkt.haslayer(ICMPv6EchoReply): del new['ICMPv6EchoReply'].cksum new = new.__class__(str(new)) self.assertEqual(new['ICMPv6EchoReply'].cksum, pkt['ICMPv6EchoReply'].cksum) def create_stream_in(self, in_if, out_if, ttl=64): """ Create packet stream for inside network :param in_if: Inside interface :param out_if: Outside interface :param ttl: TTL of generated packets """ pkts = [] # TCP p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / TCP(sport=self.tcp_port_in, dport=20)) pkts.append(p) # UDP p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / UDP(sport=self.udp_port_in, dport=20)) pkts.append(p) # ICMP p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / ICMP(id=self.icmp_id_in, type='echo-request')) pkts.append(p) return pkts def compose_ip6(self, ip4, pref, plen): """ Compose IPv4-embedded IPv6 addresses :param ip4: IPv4 address :param pref: IPv6 prefix :param plen: IPv6 prefix length :returns: IPv4-embedded IPv6 addresses """ pref_n = list(socket.inet_pton(socket.AF_INET6, pref)) ip4_n = list(socket.inet_pton(socket.AF_INET, ip4)) if plen == 32: pref_n[4] = ip4_n[0] pref_n[5] = ip4_n[1] pref_n[6] = ip4_n[2] pref_n[7] = ip4_n[3] elif plen == 40: pref_n[5] = ip4_n[0] pref_n[6] = ip4_n[1] pref_n[7] = ip4_n[2] pref_n[9] = ip4_n[3] elif plen == 48: pref_n[6] = ip4_n[0] pref_n[7] = ip4_n[1] pref_n[9] = ip4_n[2] pref_n[10] = ip4_n[3] elif plen == 56: pref_n[7] = ip4
# Copyright (c) 2018 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

if(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
  return()
endif()

find_path(MUSDK_INCLUDE_DIR NAMES mv_std.h)
find_library(MUSDK_LIB NAMES libmusdk.a)

if(MUSDK_INCLUDE_DIR AND MUSDK_LIB)
  get_filename_component(MUSDK_LIB_DIR ${MUSDK_LIB} DIRECTORY)
  set(MUSDK_LINK_FLAGS "-Wl,--whole-archive,${MUSDK_LIB_DIR}/libmusdk.a,--no-whole-archive")
  add_vpp_plugin(marvell
    SOURCES
    plugin.c
    pp2/cli.c
    pp2/format.c
    pp2/input.c
    pp2/output.c
    pp2/pp2.c
    pp2/pp2_api.c

    API_FILES
    pp2/pp2.api

    API_TEST_SOURCES
    pp2/pp2_test.c

    LINK_FLAGS
    ${MUSDK_LINK_FLAGS}
  )
  include_directories(${MUSDK_INCLUDE_DIR})
  message(STATUS "Found Marvell MUSDK in ${MUSDK_INCLUDE_DIR}")
else()
  message(WARNING "Marvell MUSDK not found - marvell_plugin disabled")
endif()
else: self.assertEqual(inner_ip[ICMPerror].id, self.icmp_id_in) except: self.logger.error(ppp("Unexpected or invalid packet " "(inside network):", packet)) raise def verify_ipfix_nat44_ses(self, data): """ Verify IPFIX NAT44 session create/delete event :param data: Decoded IPFIX data records """ nat44_ses_create_num = 0 nat44_ses_delete_num = 0 self.assertEqual(6, len(data)) for record in data: # natEvent self.assertIn(ord(record[230]), [4, 5]) if ord(record[230]) == 4: nat44_ses_create_num += 1 else: nat44_ses_delete_num += 1 # sourceIPv4Address self.assertEqual(self.pg0.remote_ip4n, record[8]) # postNATSourceIPv4Address self.assertEqual(socket.inet_pton(socket.AF_INET, self.nat_addr), record[225]) # ingressVRFID self.assertEqual(struct.pack("!I", 0), record[234]) # protocolIdentifier/sourceTransportPort/postNAPTSourceTransportPort if IP_PROTOS.icmp == ord(record[4]): self.assertEqual(struct.pack("!H", self.icmp_id_in), record[7]) self.assertEqual(struct.pack("!H", self.icmp_id_out), record[227]) elif IP_PROTOS.tcp == ord(record[4]): self.assertEqual(struct.pack("!H", self.tcp_port_in), record[7]) self.assertEqual(struct.pack("!H", self.tcp_port_out), record[227]) elif IP_PROTOS.udp == ord(record[4]): self.assertEqual(struct.pack("!H", self.udp_port_in), record[7]) self.assertEqual(struct.pack("!H", self.udp_port_out), record[227]) else: self.fail("Invalid protocol") self.assertEqual(3, nat44_ses_create_num) self.assertEqual(3, nat44_ses_delete_num) def verify_ipfix_addr_exhausted(self, data): """ Verify IPFIX NAT addresses event :param data: Decoded IPFIX data records """ self.assertEqual(1, len(data)) record = data[0] # natEvent self.assertEqual(ord(record[230]), 3) # natPoolID self.assertEqual(struct.pack("!I", 0), record[283]) class TestNAT44(MethodHolder): """ NAT44 Test Cases """ @classmethod def setUpClass(cls): super(TestNAT44, cls).setUpClass() try: cls.tcp_port_in = 6303 cls.tcp_port_out = 6303 cls.udp_port_in = 6304 cls.udp_port_out = 6304 cls.icmp_id_in = 6305 cls.icmp_id_out = 6305 cls.nat_addr = '10.0.0.3' cls.ipfix_src_port = 4739 cls.ipfix_domain_id = 1 cls.create_pg_interfaces(range(9)) cls.interfaces = list(cls.pg_interfaces[0:4]) for i in cls.interfaces: i.admin_up() i.config_ip4() i.resolve_arp() cls.pg0.generate_remote_hosts(3) cls.pg0.configure_ipv4_neighbors() cls.overlapping_interfaces = list(list(cls.pg_interfaces[4:7])) cls.pg4._local_ip4 = "172.16.255.1" cls.pg4._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4) cls.pg4._remote_hosts[0]._ip4 = "172.16.255.2" cls.pg4.set_table_ip4(10) cls.pg5._local_ip4 = "172.17.255.3" cls.pg5._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4) cls.pg5._remote_hosts[0]._ip4 = "172.17.255.4" cls.pg5.set_table_ip4(10) cls.pg6._local_ip4 = "172.16.255.1" cls.pg6._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4) cls.pg6._remote_hosts[0]._ip4 = "172.16.255.2" cls.pg6.set_table_ip4(20) for i in cls.overlapping_interfaces: i.config_ip4() i.admin_up() i.resolve_arp() cls.pg7.admin_up() cls.pg8.admin_up() except Exception: super(TestNAT44, cls).tearDownClass() raise def clear_nat44(self): """ Clear NAT44 configuration. """ # I found no elegant way to do this self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n, dst_address_length=32, next_hop_address=self.pg7.remote_ip4n, next_hop_sw_if_index=self.pg7.sw_if_index, is_add=0) self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n, dst_address_length=32, next_hop_address=self.pg8.remote_ip4n, next_hop_sw_if_index=self.pg8.sw_if_index, is_add=0) for intf in [self.pg7, self.pg8]: neighbors = self.vapi.ip_neighbor_dump(intf.sw_if_index) for n in neighbors: self.vapi.ip_neighbor_add_del(intf.sw_if_index, n.mac_address, n.ip_address, is_add=0) if self.pg7.has_ip4_config: self.pg7.unconfig_ip4() interfaces = self.vapi.nat44_interface_addr_dump() for intf in interfaces: self.vapi.nat44_add_interface_addr(intf.sw_if_index, is_add=0) self.vapi.nat_ipfix(enable=0, src_port=self.ipfix_src_port, domain_id=self.ipfix_domain_id) self.ipfix_src_port = 4739 self.ipfix_domain_id = 1 interfaces = self.vapi.nat44_interface_dump() for intf in interfaces: self.vapi.nat44_interface_add_del_feature(intf.sw_if_index, intf.is_inside, is_add=0) interfaces = self.vapi.nat44_interface_output_feature_dump() for intf in interfaces: self.vapi.nat44_interface_add_del_output_feature(intf.sw_if_index, intf.is_inside, is_add=0) static_mappings = self.vapi.nat44_static_mapping_dump() for sm in static_mappings: self.vapi.nat44_add_del_static_mapping( sm.local_ip_address, sm.external_ip_address, local_port=sm.local_port, external_port=sm.external_port, addr_only=sm.addr_only, vrf_id=sm.vrf_id, protocol=sm.protocol, is_add=0) adresses = self.vapi.nat44_address_dump() for addr in adresses: self.vapi.nat44_add_del_address_range(addr.ip_address, addr.ip_address, is_add=0) def nat44_add_static_mapping(self, local_ip, external_ip='0.0.0.0', local_port=0, external_port=0, vrf_id=0, is_add=1, external_sw_if_index=0xFFFFFFFF, proto=0): """ Add/delete NAT44 static mapping :param local_ip: Local IP address :param external_ip: External IP address :param local_port: Local port number (Optional) :param external_port: External port number (Optional) :param vrf_id: VRF ID (Default 0) :param is_add: 1 if add, 0 if delete (Default add) :param external_sw_if_index: External interface instead of IP address :param proto: IP protocol (Mandatory if port specified) """ addr_only = 1 if local_port and external_port: addr_only = 0 l_ip = socket.inet_pton(socket.AF_INET, local_ip) e_ip = socket.inet_pton(socket.AF_INET, external_ip) self.vapi.nat44_add_del_static_mapping( l_ip, e_ip, external_sw_if_index, local_port, external_port, addr_only, vrf_id, proto, is_add) def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF): """ Add/delete NAT44 address :param ip: IP address :param is_add: 1 if add, 0 if delete (Default add) """ nat_addr = socket.inet_pton(socket.AF_INET, ip) self.vapi.nat44_add_del_address_range(nat_addr, nat_addr, is_add, vrf_id=vrf_id) def test_dynamic(self): """ NAT44 dynamic translation test """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # in2out pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) # out2in pkts = self.create_stream_out(self.pg1) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) def test_dynamic_icmp_errors_in2out_ttl_1(self): """ NAT44 handling of client packets with TTL=1 """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # Client side - generate traffic pkts = self.create_stream_in(self.pg0, self.pg1, ttl=1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Client side - verify ICMP type 11 packets capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in_with_icmp_errors(capture, self.pg0) def test_dynamic_icmp_errors_out2in_ttl_1(self): """ NAT44 handling of server packets with TTL=1 """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # Client side - create sessions pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Server side - generate traffic capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) pkts = self.create_stream_out(self.pg1, ttl=1) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Server side - verify ICMP type 11 packets capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out_with_icmp_errors(capture, src_ip=self.pg1.local_ip4) def test_dynamic_icmp_errors_in2out_ttl_2(self): """ NAT44 handling of error responses to client packets with TTL=2 """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # Client side - generate traffic pkts = self.create_stream_in(self.pg0, self.pg1, ttl=2) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Server side - simulate ICMP type 11 response capture = self.pg1.get_capture(len(pkts)) pkts = [Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / ICMP(type=11) / packet[IP] for packet in capture] self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Client side - verify ICMP type 11 packets capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in_with_icmp_errors(capture, self.pg0) def test_dynamic_icmp_errors_out2in_ttl_2(self): """ NAT44 handling of error responses to server packets with TTL=2 """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # Client side - create sessions pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Server side - generate traffic capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) pkts = self.create_stream_out(self.pg1, ttl=2) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Client side - simulate ICMP type 11 response capture = self.pg0.get_capture(len(pkts)) pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / ICMP(type=11) / packet[IP] for packet in capture] self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Server side - verify ICMP type 11 packets capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out_with_icmp_errors(capture) def test_ping_out_interface_from_outside(self): """ Ping NAT44 out interface from outside network """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) / ICMP(id=self.icmp_id_out, type='echo-request')) pkts = [p] self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.assertEqual(1, len(capture)) packet = capture[0] try: self.assertEqual(packet[IP].src, self.pg1.local_ip4) self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) self.assertEqual(packet[ICMP].id, self.icmp_id_in) self.assertEqual(packet[ICMP].type, 0) # echo reply except: self.logger.error(ppp("Unexpected or invalid packet " "(outside network):", packet)) raise def test_ping_internal_host_from_outside(self): """ Ping internal host from outside network """ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # out2in pkt = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr, ttl=64) / ICMP(id=self.icmp_id_out, type='echo-request')) self.pg1.add_stream(pkt) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(1) self.verify_capture_in(capture, self.pg0, packet_num=1) self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp) # in2out pkt = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) / ICMP(id=self.icmp_id_in, type='echo-reply')) self.pg0.add_stream(pkt) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(1) self.verify_capture_out(capture, same_port=True, packet_num=1) self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp) def test_static_in(self): """ 1:1 NAT initialized from inside network """ nat_ip = "10.0.0.10" self.tcp_port_out = 6303 self.udp_port_out = 6304 self.icmp_id_out = 6305 self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # in2out pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip, True) # out2in pkts = self.create_stream_out(self.pg1, nat_ip) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) def test_static_out(self): """ 1:1 NAT initialized from outside network """ nat_ip = "10.0.0.20" self.tcp_port_out = 6303 self.udp_port_out = 6304 self.icmp_id_out = 6305 self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # out2in pkts = self.create_stream_out(self.pg1, nat_ip) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) # in2out pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip, True) def test_static_with_port_in(self): """ 1:1 NAPT initialized from inside network """ self.tcp_port_out = 3606 self.udp_port_out = 3607 self.icmp_id_out = 3608 self.nat44_add_address(self.nat_addr) self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, self.tcp_port_in, self.tcp_port_out, proto=IP_PROTOS.tcp) self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, self.udp_port_in, self.udp_port_out, proto=IP_PROTOS.udp) self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, self.icmp_id_in, self.icmp_id_out, proto=IP_PROTOS.icmp) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # in2out pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) # out2in pkts = self.create_stream_out(self.pg1) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) def test_static_with_port_out(self): """ 1:1 NAPT initialized from outside network """ self.tcp_port_out = 30606 self.udp_port_out = 30607 self.icmp_id_out = 30608 self.nat44_add_address(self.nat_addr) self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, self.tcp_port_in, self.tcp_port_out, proto=IP_PROTOS.tcp) self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, self.udp_port_in, self.udp_port_out, proto=IP_PROTOS.udp) self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, self.icmp_id_in, self.icmp_id_out, proto=IP_PROTOS.icmp) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # out2in pkts = self.create_stream_out(self.pg1) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) # in2out pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) def test_static_vrf_aware(self): """ 1:1 NAT VRF awareness """ nat_ip1 = "10.0.0.30" nat_ip2 = "10.0.0.40" self.tcp_port_out = 6303 self.udp_port_out = 6304 self.icmp_id_out = 6305 self.nat44_add_static_mapping(self.pg4.remote_ip4, nat_ip1, vrf_id=10) self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip2, vrf_id=10) self.vapi.nat44_interface_add_del_feature(self.pg3.sw_if_index, is_inside=0) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg4.sw_if_index) # inside interface VRF match NAT44 static mapping VRF pkts = self.create_stream_in(self.pg4, self.pg3) self.pg4.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip1, True) # inside interface VRF don't match NAT44 static mapping VRF (packets # are dropped) pkts = self.create_stream_in(self.pg0, self.pg3) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg3.assert_nothing_captured() def test_multiple_inside_interfaces(self): """ NAT44 multiple non-overlapping address space inside interfaces """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg3.sw_if_index, is_inside=0) # between two NAT44 inside interfaces (no translation) pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_no_translation(capture, self.pg0, self.pg1) # from NAT44 inside to interface without NAT44 feature (no translation) pkts = self.create_stream_in(self.pg0, self.pg2) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg2.get_capture(len(pkts)) self.verify_capture_no_translation(capture, self.pg0, self.pg2) # in2out 1st interface pkts = self.create_stream_in(self.pg0, self.pg3) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture) # out2in 1st interface pkts = self.create_stream_out(self.pg3) self.pg3.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) # in2out 2nd interface pkts = self.create_stream_in(self.pg1, self.pg3) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture) # out2in 2nd interface pkts = self.create_stream_out(self.pg3) self.pg3.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg1) def test_inside_overlapping_interfaces(self): """ NAT44 multiple inside interfaces with overlapping address space """ static_nat_ip = "10.0.0.10" self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg3.sw_if_index, is_inside=0) self.vapi.nat44_interface_add_del_feature(self.pg4.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg5.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg6.sw_if_index) self.nat44_add_static_mapping(self.pg6.remote_ip4, static_nat_ip, vrf_id=20) # between NAT44 inside interfaces with same VRF (no translation) pkts = self.create_stream_in(self.pg4, self.pg5) self.pg4.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg5.get_capture(len(pkts)) self.verify_capture_no_translation(capture, self.pg4, self.pg5) # between NAT44 inside interfaces with different VRF (hairpinning) p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / IP(src=self.pg4.remote_ip4, dst=static_nat_ip) / TCP(sport=1234, dport=5678)) self.pg4.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg6.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, self.nat_addr) self.assertEqual(ip.dst, self.pg6.remote_ip4) self.assertNotEqual(tcp.sport, 1234) self.assertEqual(tcp.dport, 5678) except: self.logger.error(ppp("Unexpected or invalid packet:", p)) raise # in2out 1st interface pkts = self.create_stream_in(self.pg4, self.pg3) self.pg4.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture) # out2in 1st interface pkts = self.create_stream_out(self.pg3) self.pg3.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg4.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg4) # in2out 2nd interface pkts = self.create_stream_in(self.pg5, self.pg3) self.pg5.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture) # out2in 2nd interface pkts = self.create_stream_out(self.pg3) self.pg3.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg5.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg5) # pg5 session dump addresses = self.vapi.nat44_address_dump() self.assertEqual(len(addresses), 1) sessions = self.vapi.nat44_user_session_dump(self.pg5.remote_ip4n, 10) self.assertEqual(len(sessions), 3) for session in sessions: self.assertFalse(session.is_static) self.assertEqual(session.inside_ip_address[0:4], self.pg5.remote_ip4n) self.assertEqual(session.outside_ip_address, addresses[0].ip_address) self.assertEqual(sessions[0].protocol, IP_PROTOS.tcp) self.assertEqual(sessions[1].protocol, IP_PROTOS.udp) self.assertEqual(sessions[2].protocol, IP_PROTOS.icmp) self.assertEqual(sessions[0].inside_port, self.tcp_port_in) self.assertEqual(sessions[1].inside_port, self.udp_port_in) self.assertEqual(sessions[2].inside_port, self.icmp_id_in) self.assertEqual(sessions[0].outside_port, self.tcp_port_out) self.assertEqual(sessions[1].outside_port, self.udp_port_out) self.assertEqual(sessions[2].outside_port, self.icmp_id_out) # in2out 3rd interface pkts = self.create_stream_in(self.pg6, self.pg3) self.pg6.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture, static_nat_ip, True) # out2in 3rd interface pkts = self.create_stream_out(self.pg3, static_nat_ip) self.pg3.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg6.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg6) # general user and session dump verifications users = self.vapi.nat44_user_dump() self.assertTrue(len(users) >= 3) addresses = self.vapi.nat44_address_dump() self.assertEqual(len(addresses), 1) for user in users: sessions = self.vapi.nat44_user_session_dump(user.ip_address, user.vrf_id) for session in sessions: self.assertEqual(user.ip_address, session.inside_ip_address) self.assertTrue(session.total_bytes > session.total_pkts > 0) self.assertTrue(session.protocol in [IP_PROTOS.tcp, IP_PROTOS.udp, IP_PROTOS.icmp]) # pg4 session dump sessions = self.vapi.nat44_user_session_dump(self.pg4.remote_ip4n, 10) self.assertTrue(len(sessions) >= 4) for session in sessions: self.assertFalse(session.is_static) self.assertEqual(session.inside_ip_address[0:4], self.pg4.remote_ip4n) self.assertEqual(session.outside_ip_address, addresses[0].ip_address) # pg6 session dump sessions = self.vapi.nat44_user_session_dump(self.pg6.remote_ip4n, 20) self.assertTrue(len(sessions) >= 3) for session in sessions: self.assertTrue(session.is_static) self.assertEqual(session.inside_ip_address[0:4], self.pg6.remote_ip4n) self.assertEqual(map(ord, session.outside_ip_address[0:4]), map(int, static_nat_ip.split('.'))) self.assertTrue(session.inside_port in [self.tcp_port_in, self.udp_port_in, self.icmp_id_in]) def test_hairpinning(self): """ NAT44 hairpinning - 1:1 NAPT """ host = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] host_in_port = 1234 host_out_port = 0 server_in_port = 5678 server_out_port = 8765 self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # add static mapping for server self.nat44_add_static_mapping(server.ip4, self.nat_addr, server_in_port, server_out_port, proto=IP_PROTOS.tcp) # send packet from host to server p = (Ether(src=host.mac, dst=self.pg0.local_mac) / IP(src=host.ip4, dst=self.nat_addr) / TCP(sport=host_in_port, dport=server_out_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, self.nat_addr) self.assertEqual(ip.dst, server.ip4) self.assertNotEqual(tcp.sport, host_in_port) self.assertEqual(tcp.dport, server_in_port) self.check_tcp_checksum(p) host_out_port = tcp.sport except: self.logger.error(ppp("Unexpected or invalid packet:", p)) raise # send reply from server to host p = (Ether(src=server.mac, dst=self.pg0.local_mac) / IP(src=server.ip4, dst=self.nat_addr) / TCP(sport=server_in_port, dport=host_out_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, self.nat_addr) self.assertEqual(ip.dst, host.ip4) self.assertEqual(tcp.sport, server_out_port) self.assertEqual(tcp.dport, host_in_port) self.check_tcp_checksum(p) except: self.logger.error(ppp("Unexpected or invalid packet:"), p) raise def test_hairpinning2(self): """ NAT44 hairpinning - 1:1 NAT""" server1_nat_ip = "10.0.0.10" server2_nat_ip = "10.0.0.11" host = self.pg0.remote_hosts[0] server1 = self.pg0.remote_hosts[1] server2 = self.pg0.remote_hosts[2] server_tcp_port = 22 server_udp_port = 20 self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # add static mapping for servers self.nat44_add_static_mapping(server1.ip4, server1_nat_ip) self.nat44_add_static_mapping(server2.ip4, server2_nat_ip) # host to server1 pkts = [] p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=host.ip4, dst=server1_nat_ip) / TCP(sport=self.tcp_port_in, dport=server_tcp_port)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=host.ip4, dst=server1_nat_ip) / UDP(sport=self.udp_port_in, dport=server_udp_port)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=host.ip4, dst=server1_nat_ip) / ICMP(id=self.icmp_id_in, type='echo-request')) pkts.append(p) self.pg0.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[IP].src, self.nat_addr) self.assertEqual(packet[IP].dst, server1.ip4) if packet.haslayer(TCP): self.assertNotEqual(packet[TCP].sport, self.tcp_port_in) self.assertEqual(packet[TCP].dport, server_tcp_port) self.tcp_port_out = packet[TCP].sport self.check_tcp_checksum(packet) elif packet.haslayer(UDP): self.assertNotEqual(packet[UDP].sport, self.udp_port_in) self.assertEqual(packet[UDP].dport, server_udp_port) self.udp_port_out = packet[UDP].sport else: self.assertNotEqual(packet[ICMP].id, self.icmp_id_in) self.icmp_id_out = packet[ICMP].id except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # server1 to host pkts = [] p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server1.ip4, dst=self.nat_addr) / TCP(sport=server_tcp_port, dport=self.tcp_port_out)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server1.ip4, dst=self.nat_addr) / UDP(sport=server_udp_port, dport=self.udp_port_out)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server1.ip4, dst=self.nat_addr) / ICMP(id=self.icmp_id_out, type='echo-reply')) pkts.append(p) self.pg0.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[IP].src, server1_nat_ip) self.assertEqual(packet[IP].dst, host.ip4) if packet.haslayer(TCP): self.assertEqual(packet[TCP].dport, self.tcp_port_in) self.assertEqual(packet[TCP].sport, server_tcp_port) self.check_tcp_checksum(packet) elif packet.haslayer(UDP): self.assertEqual(packet[UDP].dport, self.udp_port_in) self.assertEqual(packet[UDP].sport, server_udp_port) else: self.assertEqual(packet[ICMP].id, self.icmp_id_in) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # server2 to server1 pkts = [] p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server2.ip4, dst=server1_nat_ip) / TCP(sport=self.tcp_port_in, dport=server_tcp_port)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server2.ip4, dst=server1_nat_ip) / UDP(sport=self.udp_port_in, dport=server_udp_port)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server2.ip4, dst=server1_nat_ip) / ICMP(id=self.icmp_id_in, type='echo-request')) pkts.append(p) self.pg0.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[IP].src, server2_nat_ip) self.assertEqual(packet[IP].dst, server1.ip4) if packet.haslayer(TCP): self.assertEqual(packet[TCP].sport, self.tcp_port_in) self.assertEqual(packet[TCP].dport, server_tcp_port) self.tcp_port_out = packet[TCP].sport self.check_tcp_checksum(packet) elif packet.haslayer(UDP): self.assertEqual(packet[UDP].sport, self.udp_port_in) self.assertEqual(packet[UDP].dport, server_udp_port) self.udp_port_out = packet[UDP].sport else: self.assertEqual(packet[ICMP].id, self.icmp_id_in) self.icmp_id_out = packet[ICMP].id except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # server1 to server2 pkts = [] p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server1.ip4, dst=server2_nat_ip) / TCP(sport=server_tcp_port, dport=self.tcp_port_out)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server1.ip4, dst=server2_nat_ip) / UDP(sport=server_udp_port, dport=self.udp_port_out)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=server1.ip4, dst=server2_nat_ip) / ICMP(id=self.icmp_id_out, type='echo-reply')) pkts.append(p) self.pg0.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[IP].src, server1_nat_ip) self.assertEqual(packet[IP].dst, server2.ip4) if packet.haslayer(TCP): self.assertEqual(packet[TCP].dport, self.tcp_port_in) self.assertEqual(packet[TCP].sport, server_tcp_port) self.check_tcp_checksum(packet) elif packet.haslayer(UDP): self.assertEqual(packet[UDP].dport, self.udp_port_in) self.assertEqual(packet[UDP].sport, server_udp_port) else: self.assertEqual(packet[ICMP].id, self.icmp_id_in) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def test_max_translations_per_user(self): """ MAX translations per user - recycle the least recently used """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # get maximum number of translations per user nat44_config = self.vapi.nat_show_config() # send more than maximum number of translations per user packets pkts_num = nat44_config.max_translations_per_user + 5 pkts = [] for port in range(0, pkts_num): p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=1025 + port)) pkts.append(p) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # verify number of translated packet self.pg1.get_capture(pkts_num) def test_interface_addr(self): """ Acquire NAT44 addresses from interface """ self.vapi.nat44_add_interface_addr(self.pg7.sw_if_index) # no address in NAT pool adresses = self.vapi.nat44_address_dump() self.assertEqual(0, len(adresses)) # configure interface address and check NAT address pool self.pg7.config_ip4() adresses = self.vapi.nat44_address_dump() self.assertEqual(1, len(adresses)) self.assertEqual(adresses[0].ip_address[0:4], self.pg7.local_ip4n) # remove interface address and check NAT address pool self.pg7.unconfig_ip4() adresses = self.vapi.nat44_address_dump() self.assertEqual(0, len(adresses)) def test_interface_addr_static_mapping(self): """ Static mapping with addresses from interface """ self.vapi.nat44_add_interface_addr(self.pg7.sw_if_index) self.nat44_add_static_mapping( '1.2.3.4', external_sw_if_index=self.pg7.sw_if_index) # static mappings with external interface static_mappings = self.vapi.nat44_static_mapping_dump() self.assertEqual(1, len(static_mappings)) self.assertEqual(self.pg7.sw_if_index, static_mappings[0].external_sw_if_index) # configure interface address and check static mappings self.pg7.config_ip4() static_mappings = self.vapi.nat44_static_mapping_dump() self.assertEqual(1, len(static_mappings)) self.assertEqual(static_mappings[0].external_ip_address[0:4], self.pg7.local_ip4n) self.assertEqual(0xFFFFFFFF, static_mappings[0].external_sw_if_index) # remove interface address and check static mappings self.pg7.unconfig_ip4() static_mappings = self.vapi.nat44_static_mapping_dump() self.assertEqual(0, len(static_mappings)) def test_ipfix_nat44_sess(self): """ IPFIX logging NAT44 session created/delted """ self.ipfix_domain_id = 10 self.ipfix_src_port = 20202 colector_port = 30303 bind_layers(UDP, IPFIX, dport=30303) self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, src_address=self.pg3.local_ip4n, path_mtu=512, template_interval=10, collector_port=colector_port) self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id, src_port=self.ipfix_src_port) pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) self.nat44_add_address(self.nat_addr, is_add=0) self.vapi.cli("ipfix flush") # FIXME this should be an API call capture = self.pg3.get_capture(3) ipfix = IPFIXDecoder() # first load template for p in capture: self.assertTrue(p.haslayer(IPFIX)) self.assertEqual(p[IP].src, self.pg3.local_ip4) self.assertEqual(p[IP].dst, self.pg3.remote_ip4) self.assertEqual(p[UDP].sport, self.ipfix_src_port) self.assertEqual(p[UDP].dport, colector_port) self.assertEqual(p[IPFIX].observationDomainID, self.ipfix_domain_id) if p.haslayer(Template): ipfix.add_template(p.getlayer(Template)) # verify events in data set for p in capture: if p.haslayer(Data): data = ipfix.decode_data_set(p.getlayer(Set)) self.verify_ipfix_nat44_ses(data) def test_ipfix_addr_exhausted(self): """ IPFIX logging NAT addresses exhausted """ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, src_address=self.pg3.local_ip4n, path_mtu=512, template_interval=10) self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id, src_port=self.ipfix_src_port) p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=3025)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(0) self.vapi.cli("ipfix flush") # FIXME this should be an API call capture = self.pg3.get_capture(3) ipfix = IPFIXDecoder() # first load template for p in capture: self.assertTrue(p.haslayer(IPFIX)) self.assertEqual(p[IP].src, self.pg3.local_ip4) self.assertEqual(p[IP].dst, self.pg3.remote_ip4) self.assertEqual(p[UDP].sport, self.ipfix_src_port) self.assertEqual(p[UDP].dport, 4739) self.assertEqual(p[IPFIX].observationDomainID, self.ipfix_domain_id) if p.haslayer(Template): ipfix.add_template(p.getlayer(Template)) # verify events in data set for p in capture: if p.haslayer(Data): data = ipfix.decode_data_set(p.getlayer(Set)) self.verify_ipfix_addr_exhausted(data) def test_pool_addr_fib(self): """ NAT44 add pool addresses to FIB """ static_addr = '10.0.0.10' self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) self.nat44_add_static_mapping(self.pg0.remote_ip4, static_addr) # NAT44 address p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / ARP(op=ARP.who_has, pdst=self.nat_addr, psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(1) self.assertTrue(capture[0].haslayer(ARP)) self.assertTrue(capture[0][ARP].op, ARP.is_at) # 1:1 NAT address p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / ARP(op=ARP.who_has, pdst=static_addr, psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(1) self.assertTrue(capture[0].haslayer(ARP)) self.assertTrue(capture[0][ARP].op, ARP.is_at) # send ARP to non-NAT44 interface p = (Ether(src=self.pg2.remote_mac, dst='ff:ff:ff:ff:ff:ff') / ARP(op=ARP.who_has, pdst=self.nat_addr, psrc=self.pg2.remote_ip4, hwsrc=self.pg2.remote_mac)) self.pg2.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(0) # remove addresses and verify self.nat44_add_address(self.nat_addr, is_add=0) self.nat44_add_static_mapping(self.pg0.remote_ip4, static_addr, is_add=0) p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / ARP(op=ARP.who_has, pdst=self.nat_addr, psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(0) p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / ARP(op=ARP.who_has, pdst=static_addr, psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(0) def test_vrf_mode(self): """ NAT44 tenant VRF aware address pool mode """ vrf_id1 = 1 vrf_id2 = 2 nat_ip1 = "10.0.0.10" nat_ip2 = "10.0.0.11" self.pg0.unconfig_ip4() self.pg1.unconfig_ip4() self.pg0.set_table_ip4(vrf_id1) self.pg1.set_table_ip4(vrf_id2) self.pg0.config_ip4() self.pg1.config_ip4() self.nat44_add_address(nat_ip1, vrf_id=vrf_id1) self.nat44_add_address(nat_ip2, vrf_id=vrf_id2) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg2.sw_if_index, is_inside=0) # first VRF pkts = self.create_stream_in(self.pg0, self.pg2) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg2.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip1) # second VRF pkts = self.create_stream_in(self.pg1, self.pg2) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg2.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip2) def test_vrf_feature_independent(self): """ NAT44 tenant VRF independent address pool mode """ nat_ip1 = "10.0.0.10" nat_ip2 = "10.0.0.11" self.nat44_add_address(nat_ip1) self.nat44_add_address(nat_ip2) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg2.sw_if_index, is_inside=0) # first VRF pkts = self.create_stream_in(self.pg0, self.pg2) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg2.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip1) # second VRF pkts = self.create_stream_in(self.pg1, self.pg2) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg2.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip1) def test_dynamic_ipless_interfaces(self): """ NAT44 interfaces without configured IP address """ self.vapi.ip_neighbor_add_del(self.pg7.sw_if_index, self.pg7.remote_mac, self.pg7.remote_ip4n, is_static=1) self.vapi.ip_neighbor_add_del(self.pg8.sw_if_index, self.pg8.remote_mac, self.pg8.remote_ip4n, is_static=1) self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n, dst_address_length=32, next_hop_address=self.pg7.remote_ip4n, next_hop_sw_if_index=self.pg7.sw_if_index) self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n, dst_address_length=32, next_hop_address=self.pg8.remote_ip4n, next_hop_sw_if_index=self.pg8.sw_if_index) self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg7.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg8.sw_if_index, is_inside=0) # in2out pkts = self.create_stream_in(self.pg7, self.pg8) self.pg7.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg8.get_capture(len(pkts)) self.verify_capture_out(capture) # out2in pkts = self.create_stream_out(self.pg8, self.nat_addr) self.pg8.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg7.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg7) def test_static_ipless_interfaces(self): """ NAT44 interfaces without configured IP address - 1:1 NAT """ self.vapi.ip_neighbor_add_del(self.pg7.sw_if_index, self.pg7.remote_mac, self.pg7.remote_ip4n, is_static=1) self.vapi.ip_neighbor_add_del(self.pg8.sw_if_index, self.pg8.remote_mac, self.pg8.remote_ip4n, is_static=1) self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n, dst_address_length=32, next_hop_address=self.pg7.remote_ip4n, next_hop_sw_if_index=self.pg7.sw_if_index) self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n, dst_address_length=32, next_hop_address=self.pg8.remote_ip4n, next_hop_sw_if_index=self.pg8.sw_if_index) self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg7.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg8.sw_if_index, is_inside=0) # out2in pkts = self.create_stream_out(self.pg8) self.pg8.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg7.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg7) # in2out pkts = self.create_stream_in(self.pg7, self.pg8) self.pg7.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg8.get_capture(len(pkts)) self.verify_capture_out(capture, self.nat_addr, True) def test_static_with_port_ipless_interfaces(self): """ NAT44 interfaces without configured IP address - 1:1 NAPT """ self.tcp_port_out = 30606 self.udp_port_out = 30607 self.icmp_id_out = 30608 self.vapi.ip_neighbor_add_del(self.pg7.sw_if_index, self.pg7.remote_mac, self.pg7.remote_ip4n, is_static=1) self.vapi.ip_neighbor_add_del(self.pg8.sw_if_index, self.pg8.remote_mac, self.pg8.remote_ip4n, is_static=1) self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n, dst_address_length=32, next_hop_address=self.pg7.remote_ip4n, next_hop_sw_if_index=self.pg7.sw_if_index) self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n, dst_address_length=32, next_hop_address=self.pg8.remote_ip4n, next_hop_sw_if_index=self.pg8.sw_if_index) self.nat44_add_address(self.nat_addr) self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, self.tcp_port_in, self.tcp_port_out, proto=IP_PROTOS.tcp) self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, self.udp_port_in, self.udp_port_out, proto=IP_PROTOS.udp) self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, self.icmp_id_in, self.icmp_id_out, proto=IP_PROTOS.icmp) self.vapi.nat44_interface_add_del_feature(self.pg7.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg8.sw_if_index, is_inside=0) # out2in pkts = self.create_stream_out(self.pg8) self.pg8.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg7.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg7) # in2out pkts = self.create_stream_in(self.pg7, self.pg8) self.pg7.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg8.get_capture(len(pkts)) self.verify_capture_out(capture) def test_static_unknown_proto(self): """ 1:1 NAT translate packet with unknown protocol """ nat_ip = "10.0.0.10" self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # in2out p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / GRE() / IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg1.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, nat_ip) self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # out2in p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=nat_ip) / GRE() / IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, self.pg1.remote_ip4) self.assertEqual(packet[IP].dst, self.pg0.remote_ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def test_hairpinning_static_unknown_proto(self): """ 1:1 NAT translate packet with unknown protocol - hairpinning """ host = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] host_nat_ip = "10.0.0.10" server_nat_ip = "10.0.0.11" self.nat44_add_static_mapping(host.ip4, host_nat_ip) self.nat44_add_static_mapping(server.ip4, server_nat_ip) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # host to server p = (Ether(dst=self.pg0.local_mac, src=host.mac) / IP(src=host.ip4, dst=server_nat_ip) / GRE() / IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, host_nat_ip) self.assertEqual(packet[IP].dst, server.ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # server to host p = (Ether(dst=self.pg0.local_mac, src=server.mac) / IP(src=server.ip4, dst=host_nat_ip) / GRE() / IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, server_nat_ip) self.assertEqual(packet[IP].dst, host.ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def test_unknown_proto(self): """ NAT44 translate packet with unknown protocol """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # in2out p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=self.tcp_port_in, dport=20)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg1.get_capture(1) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / GRE() / IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg1.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, self.nat_addr) self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # out2in p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / GRE() / IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, self.pg1.remote_ip4) self.assertEqual(packet[IP].dst, self.pg0.remote_ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def test_hairpinning_unknown_proto(self): """ NAT44 translate packet with unknown protocol - hairpinning """ host = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] host_in_port = 1234 host_out_port = 0 server_in_port = 5678 server_out_port = 8765 server_nat_ip = "10.0.0.11" self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # add static mapping for server self.nat44_add_static_mapping(server.ip4, server_nat_ip) # host to server p = (Ether(src=host.mac, dst=self.pg0.local_mac) / IP(src=host.ip4, dst=server_nat_ip) / TCP(sport=host_in_port, dport=server_out_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(1) p = (Ether(dst=self.pg0.local_mac, src=host.mac) / IP(src=host.ip4, dst=server_nat_ip) / GRE() / IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, self.nat_addr) self.assertEqual(packet[IP].dst, server.ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # server to host p = (Ether(dst=self.pg0.local_mac, src=server.mac) / IP(src=server.ip4, dst=self.nat_addr) / GRE() / IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, server_nat_ip) self.assertEqual(packet[IP].dst, host.ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def test_output_feature(self): """ NAT44 interface output feature (in2out postrouting) """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_output_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index, is_inside=0) # in2out pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) # out2in pkts = self.create_stream_out(self.pg1) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) def test_output_feature_vrf_aware(self): """ NAT44 interface output feature VRF aware (in2out postrouting) """ nat_ip_vrf10 = "10.0.0.10" nat_ip_vrf20 = "10.0.0.20" self.vapi.ip_add_del_route(dst_address=self.pg3.remote_ip4n, dst_address_length=32, next_hop_address=self.pg3.remote_ip4n, next_hop_sw_if_index=self.pg3.sw_if_index, table_id=10) self.vapi.ip_add_del_route(dst_address=self.pg3.remote_ip4n, dst_address_length=32, next_hop_address=self.pg3.remote_ip4n, next_hop_sw_if_index=self.pg3.sw_if_index, table_id=20) self.nat44_add_address(nat_ip_vrf10, vrf_id=10) self.nat44_add_address(nat_ip_vrf20, vrf_id=20) self.vapi.nat44_interface_add_del_output_feature(self.pg4.sw_if_index) self.vapi.nat44_interface_add_del_output_feature(self.pg6.sw_if_index) self.vapi.nat44_interface_add_del_output_feature(self.pg3.sw_if_index, is_inside=0) # in2out VRF 10 pkts = self.create_stream_in(self.pg4, self.pg3) self.pg4.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip=nat_ip_vrf10) # out2in VRF 10 pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf10) self.pg3.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg4.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg4) # in2out VRF 20 pkts = self.create_stream_in(self.pg6, self.pg3) self.pg6.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip=nat_ip_vrf20) # out2in VRF 20 pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf20) self.pg3.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg6.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg6) def test_output_feature_hairpinning(self): """ NAT44 interface output feature hairpinning (in2out postrouting) """ host = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] host_in_port = 1234 host_out_port = 0 server_in_port = 5678 server_out_port = 8765 self.nat44_add_address(self.nat_addr) self.vapi.nat44_interface_add_del_output_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index, is_inside=0) # add static mapping for server self.nat44_add_static_mapping(server.ip4, self.nat_addr, server_in_port, server_out_port, proto=IP_PROTOS.tcp) # send packet from host to server p = (Ether(src=host.mac, dst=self.pg0.local_mac) / IP(src=host.ip4, dst=self.nat_addr) / TCP(sport=host_in_port, dport=server_out_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, self.nat_addr) self.assertEqual(ip.dst, server.ip4) self.assertNotEqual(tcp.sport, host_in_port) self.assertEqual(tcp.dport, server_in_port) self.check_tcp_checksum(p) host_out_port = tcp.sport except: self.logger.error(ppp("Unexpected or invalid packet:", p)) raise # send reply from server to host p = (Ether(src=server.mac, dst=self.pg0.local_mac) / IP(src=server.ip4, dst=self.nat_addr) / TCP(sport=server_in_port, dport=host_out_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, self.nat_addr) self.assertEqual(ip.dst, host.ip4) self.assertEqual(tcp.sport, server_out_port) self.assertEqual(tcp.dport, host_in_port) self.check_tcp_checksum(p) except: self.logger.error(ppp("Unexpected or invalid packet:"), p) raise def tearDown(self): super(TestNAT44, self).tearDown() if not self.vpp_dead: self.logger.info(self.vapi.cli("show nat44 verbose")) self.clear_nat44() class TestDeterministicNAT(MethodHolder): """ Deterministic NAT Test Cases """ @classmethod def setUpConstants(cls): super(TestDeterministicNAT, cls).setUpConstants() cls.vpp_cmdline.extend(["nat", "{", "deterministic", "}"]) @classmethod def setUpClass(cls): super(TestDeterministicNAT, cls).setUpClass() try: cls.tcp_port_in = 6303 cls.tcp_external_port = 6303 cls.udp_port_in = 6304 cls.udp_external_port = 6304 cls.icmp_id_in = 6305 cls.nat_addr = '10.0.0.3' cls.create_pg_interfaces(range(3)) cls.interfaces = list(cls.pg_interfaces) for i in cls.interfaces: i.admin_up() i.config_ip4() i.resolve_arp() cls.pg0.generate_remote_hosts(2) cls.pg0.configure_ipv4_neighbors() except Exception: super(TestDeterministicNAT, cls).tearDownClass() raise def create_stream_in(self, in_if, out_if, ttl=64): """ Create packet stream for inside network :param in_if: Inside interface :param out_if: Outside interface :param ttl: TTL of generated packets """ pkts = [] # TCP p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / TCP(sport=self.tcp_port_in, dport=self.tcp_external_port)) pkts.append(p) # UDP p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / UDP(sport=self.udp_port_in, dport=self.udp_external_port)) pkts.append(p) # ICMP p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / ICMP(id=self.icmp_id_in, type='echo-request')) pkts.append(p) return pkts def create_stream_out(self, out_if, dst_ip=None, ttl=64): """ Create packet stream for outside network :param out_if: Outside interface :param dst_ip: Destination IP address (Default use global NAT address) :param ttl: TTL of generated packets """ if dst_ip is None: dst_ip = self.nat_addr pkts = [] # TCP p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / TCP(dport=self.tcp_port_out, sport=self.tcp_external_port)) pkts.append(p) # UDP p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / UDP(dport=self.udp_port_out, sport=self.udp_external_port)) pkts.append(p) # ICMP p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / ICMP(id=self.icmp_external_id, type='echo-reply')) pkts.append(p) return pkts def verify_capture_out(self, capture, nat_ip=None, packet_num=3): """ Verify captured packets on outside network :param capture: Captured packets :param nat_ip: Translated IP address (Default use global NAT address) :param same_port: Sorce port number is not translated (Default False) :param packet_num: Expected number of packets (Default 3) """ if nat_ip is None: nat_ip = self.nat_addr self.assertEqual(packet_num, len(capture)) for packet in capture: try: self.assertEqual(packet[IP].src, nat_ip) if packet.haslayer(TCP): self.tcp_port_out = packet[TCP].sport elif packet.haslayer(UDP): self.udp_port_out = packet[UDP].sport else: self.icmp_external_id = packet[ICMP].id except: self.logger.error(ppp("Unexpected or invalid packet " "(outside network):", packet)) raise def initiate_tcp_session(self, in_if, out_if): """ Initiates TCP session :param in_if: Inside interface :param out_if: Outside interface """ try: # SYN packet in->out p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) / IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) / TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, flags="S")) in_if.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = out_if.get_capture(1) p = capture[0] self.tcp_port_out = p[TCP].sport # SYN + ACK packet out->in p = (Ether(src=out_if.remote_mac, dst=out_if.local_mac) / IP(src=out_if.remote_ip4, dst=self.nat_addr) / TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, flags="SA")) out_if.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() in_if.get_capture(1) # ACK packet in->out p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) / IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) / TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, flags="A")) in_if.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() out_if.get_capture(1) except: self.logger.error("TCP 3 way handshake failed") raise def verify_ipfix_max_entries_per_user(self, data): """ Verify IPFIX maximum entries per user exceeded event :param data: Decoded IPFIX data records """ self.assertEqual(1, len(data)) record = data[0] # natEvent self.assertEqual(ord(record[230]), 13) # natQuotaExceededEvent self.assertEqual('\x03\x00\x00\x00', record[466]) # sourceIPv4Address self.assertEqual(self.pg0.remote_ip4n, record[8]) def test_deterministic_mode(self): """ NAT plugin run deterministic mode """ in_addr = '172.16.255.0' out_addr = '172.17.255.50' in_addr_t = '172.16.255.20' in_addr_n = socket.inet_aton(in_addr) out_addr_n = socket.inet_aton(out_addr) in_addr_t_n = socket.inet_aton(in_addr_t) in_plen = 24 out_plen = 32 nat_config = self.vapi.nat_show_config() self.assertEqual(1, nat_config.deterministic) self.vapi.nat_det_add_del_map(in_addr_n, in_plen, out_addr_n, out_plen) rep1 = self.vapi.nat_det_forward(in_addr_t_n) self.assertEqual(rep1.out_addr[:4], out_addr_n) rep2 = self.vapi.nat_det_reverse(out_addr_n, rep1.out_port_hi) self.assertEqual(rep2.in_addr[:4], in_addr_t_n) deterministic_mappings = self.vapi.nat_det_map_dump() self.assertEqual(len(deterministic_mappings), 1) dsm = deterministic_mappings[0] self.assertEqual(in_addr_n, dsm.in_addr[:4]) self.assertEqual(in_plen, dsm.in_plen) self.assertEqual(out_addr_n, dsm.out_addr[:4]) self.assertEqual(out_plen, dsm.out_plen) self.clear_nat_det() deterministic_mappings = self.vapi.nat_det_map_dump() self.assertEqual(len(deterministic_mappings), 0) def test_set_timeouts(self): """ Set deterministic NAT timeouts """ timeouts_before = self.vapi.nat_det_get_timeouts() self.vapi.nat_det_set_timeouts(timeouts_before.udp + 10, timeouts_before.tcp_established + 10, timeouts_before.tcp_transitory + 10, timeouts_before.icmp + 10) timeouts_after = self.vapi.nat_det_get_timeouts() self.assertNotEqual(timeouts_before.udp, timeouts_after.udp) self.assertNotEqual(timeouts_before.icmp, timeouts_after.icmp) self.assertNotEqual(timeouts_before.tcp_established, timeouts_after.tcp_established) self.assertNotEqual(timeouts_before.tcp_transitory, timeouts_after.tcp_transitory) def test_det_in(self): """ Deterministic NAT translation test (TCP, UDP, ICMP) """ nat_ip = "10.0.0.10" self.vapi.nat_det_add_del_map(self.pg0.remote_ip4n, 32, socket.inet_aton(nat_ip), 32) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # in2out pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip) # out2in pkts = self.create_stream_out(self.pg1, nat_ip) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) # session dump test sessions = self.vapi.nat_det_session_dump(self.pg0.remote_ip4n) self.assertEqual(len(sessions), 3) # TCP session s = sessions[0] self.assertEqual(s.ext_addr[:4], self.pg1.remote_ip4n) self.assertEqual(s.in_port, self.tcp_port_in) self.assertEqual(s.out_port, self.tcp_port_out) self.assertEqual(s.ext_port, self.tcp_external_port) # UDP session s = sessions[1] self.assertEqual(s.ext_addr[:4], self.pg1.remote_ip4n) self.assertEqual(s.in_port, self.udp_port_in) self.assertEqual(s.out_port, self.udp_port_out) self.assertEqual(s.ext_port, self.udp_external_port) # ICMP session s = sessions[2] self.assertEqual(s.ext_addr[:4], self.pg1.remote_ip4n) self.assertEqual(s.in_port, self.icmp_id_in) self.assertEqual(s.out_port, self.icmp_external_id) def test_multiple_users(self): """ Deterministic NAT multiple users """ nat_ip = "10.0.0.10" port_in = 80 external_port = 6303 host0 = self.pg0.remote_hosts[0] host1 = self.pg0.remote_hosts[1] self.vapi.nat_det_add_del_map(host0.ip4n, 24, socket.inet_aton(nat_ip), 32) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) # host0 to out p = (Ether(src=host0.mac, dst=self.pg0.local_mac) / IP(src=host0.ip4, dst=self.pg1.remote_ip4) / TCP(sport=port_in, dport=external_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, nat_ip) self.assertEqual(ip.dst, self.pg1.remote_ip4) self.assertEqual(tcp.dport, external_port) port_out0 = tcp.sport except: self.logger.error(ppp("Unexpected or invalid packet:", p)) raise # host1 to out p = (Ether(src=host1.mac, dst=self.pg0.local_mac) / IP(src=host1.ip4, dst=self.pg1.remote_ip4) / TCP(sport=port_in, dport=external_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, nat_ip) self.assertEqual(ip.dst, self.pg1.remote_ip4) self.assertEqual(tcp.dport, external_port) port_out1 = tcp.sport except: self.logger.error(ppp("Unexpected or invalid packet:", p)) raise dms = self.vapi.nat_det_map_dump() self.assertEqual(1, len(dms)) self.assertEqual(2, dms[0].ses_num) # out to host0 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(src=self.pg1.remote_ip4, dst=nat_ip) / TCP(sport=external_port, dport=port_out0)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, self.pg1.remote_ip4) self.assertEqual(ip.dst, host0.ip4) self.assertEqual(tcp.dport, port_in) self.assertEqual(tcp.sport, external_port) except: self.logger.error(ppp("Unexpected or invalid packet:", p)) raise # out to host1 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(src=self.pg1.remote_ip4, dst=nat_ip) / TCP(sport=external_port, dport=port_out1)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(1) p = capture[0] try: ip = p[IP] tcp = p[TCP] self.assertEqual(ip.src, self.pg1.remote_ip4) self.assertEqual(ip.dst, host1.ip4) self.assertEqual(tcp.dport, port_in) self.assertEqual(tcp.sport, external_port) except: self.logger.error(ppp("Unexpected or invalid packet", p)) raise # session close api test self.vapi.nat_det_close_session_out(socket.inet_aton(nat_ip), port_out1, self.pg1.remote_ip4n, external_port) dms = self.vapi.nat_det_map_dump() self.assertEqual(dms[0].ses_num, 1) self.vapi.nat_det_close_session_in(host0.ip4n, port_in, self.pg1.remote_ip4n, external_port) dms = self.vapi.nat_det_map_dump() self.assertEqual(dms[0].ses_num, 0) def test_tcp_session_close_detection_in(self): """ Deterministic NAT TCP session close from inside network """ self.vapi.nat_det_add_del_map(self.pg0.remote_ip4n, 32, socket.inet_aton(self.nat_addr), 32) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) self.initiate_tcp_session(self.pg0, self.pg1) # close the session from inside try: # FIN packet in -> out p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, flags="F")) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg1.get_capture(1) pkts = [] # ACK packet out -> in p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, flags="A")) pkts.append(p) # FIN packet out -> in p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, flags="F")) pkts.append(p) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg0.get_capture(2) # ACK packet in -> out p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, flags="A")) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg1.get_capture(1) # Check if deterministic NAT44 closed the session dms = self.vapi.nat_det_map_dump() self.assertEqual(0, dms[0].ses_num) except: self.logger.error("TCP session termination failed") raise def test_tcp_session_close_detection_out(self): """ Deterministic NAT TCP session close from outside network """ self.vapi.nat_det_add_del_map(self.pg0.remote_ip4n, 32, socket.inet_aton(self.nat_addr), 32) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) self.initiate_tcp_session(self.pg0, self.pg1) # close the session from outside try: # FIN packet out -> in p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, flags="F")) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg0.get_capture(1) pkts = [] # ACK packet in -> out p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, flags="A")) pkts.append(p) # ACK packet in -> out p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, flags="F")) pkts.append(p) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg1.get_capture(2) # ACK packet out -> in p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, flags="A")) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg0.get_capture(1) # Check if deterministic NAT44 closed the session dms = self.vapi.nat_det_map_dump() self.assertEqual(0, dms[0].ses_num) except: self.logger.error("TCP session termination failed") raise @unittest.skipUnless(running_extended_tests(), "part of extended tests") def test_session_timeout(self): """ Deterministic NAT session timeouts """ self.vapi.nat_det_add_del_map(self.pg0.remote_ip4n, 32, socket.inet_aton(self.nat_addr), 32) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) self.initiate_tcp_session(self.pg0, self.pg1) self.vapi.nat_det_set_timeouts(5, 5, 5, 5) pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) sleep(15) dms = self.vapi.nat_det_map_dump() self.assertEqual(0, dms[0].ses_num) @unittest.skipUnless(running_extended_tests(), "part of extended tests") def test_session_limit_per_user(self): """ Deterministic NAT maximum sessions per user limit """ self.vapi.nat_det_add_del_map(self.pg0.remote_ip4n, 32, socket.inet_aton(self.nat_addr), 32) self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, is_inside=0) self.vapi.set_ipfix_exporter(collector_address=self.pg2.remote_ip4n, src_address=self.pg2.local_ip4n, path_mtu=512, template_interval=10) self.vapi.nat_ipfix() pkts = [] for port in range(1025, 2025): p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / UDP(sport=port, dport=port)) 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)) p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / UDP(sport=3001, dport=3002)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.assert_nothing_captured() # verify ICMP error packet capture = self.pg0.get_capture(1) p = capture[0] self.assertTrue(p.haslayer(ICMP)) icmp = p[ICMP] self.assertEqual(icmp.type, 3) self.assertEqual(icmp.code, 1) self.assertTrue(icmp.haslayer(IPerror)) inner_ip = icmp[IPerror] self.assertEqual(inner_ip[UDPerror].sport, 3001) self.assertEqual(inner_ip[UDPerror].dport, 3002) dms = self.vapi.nat_det_map_dump() self.assertEqual(1000, dms[0].ses_num) # verify IPFIX logging self.vapi.cli("ipfix flush") # FIXME this should be an API call sleep(1) capture = self.pg2.get_capture(2) ipfix = IPFIXDecoder() # first load template for p in capture: self.assertTrue(p.haslayer(IPFIX)) if p.haslayer(Template): ipfix.add_template(p.getlayer(Template)) # verify events in data set for p in capture: if p.haslayer(Data): data = ipfix.decode_data_set(p.getlayer(Set)) self.verify_ipfix_max_entries_per_user(data) def clear_nat_det(self): """ Clear deterministic NAT configuration. """ self.vapi.nat_ipfix(enable=0) self.vapi.nat_det_set_timeouts() deterministic_mappings = self.vapi.nat_det_map_dump() for dsm in deterministic_mappings: self.vapi.nat_det_add_del_map(dsm.in_addr, dsm.in_plen, dsm.out_addr, dsm.out_plen, is_add=0) interfaces = self.vapi.nat44_interface_dump() for intf in interfaces: self.vapi.nat44_interface_add_del_feature(intf.sw_if_index, intf.is_inside, is_add=0) def tearDown(self): super(TestDeterministicNAT, self).tearDown() if not self.vpp_dead: self.logger.info(self.vapi.cli("show nat44 detail")) self.clear_nat_det() class TestNAT64(MethodHolder): """ NAT64 Test Cases """ @classmethod def setUpClass(cls): super(TestNAT64, cls).setUpClass() try: cls.tcp_port_in = 6303 cls.tcp_port_out = 6303 cls.udp_port_in = 6304 cls.udp_port_out = 6304 cls.icmp_id_in = 6305 cls.icmp_id_out = 6305 cls.nat_addr = '10.0.0.3' cls.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr) cls.vrf1_id = 10 cls.vrf1_nat_addr = '10.0.10.3' cls.vrf1_nat_addr_n = socket.inet_pton(socket.AF_INET, cls.vrf1_nat_addr) cls.create_pg_interfaces(range(3)) cls.ip6_interfaces = list(cls.pg_interfaces[0:1]) cls.ip6_interfaces.append(cls.pg_interfaces[2]) cls.ip4_interfaces = list(cls.pg_interfaces[1:2]) cls.pg_interfaces[2].set_table_ip6(cls.vrf1_id) cls.pg0.generate_remote_hosts(2) for i in cls.ip6_interfaces: i.admin_up() i.config_ip6() i.configure_ipv6_neighbors() for i in cls.ip4_interfaces: i.admin_up() i.config_ip4() i.resolve_arp() except Exception: super(TestNAT64, cls).tearDownClass() raise def test_pool(self): """ Add/delete address to NAT64 pool """ nat_addr = socket.inet_pton(socket.AF_INET, '1.2.3.4') self.vapi.nat64_add_del_pool_addr_range(nat_addr, nat_addr) addresses = self.vapi.nat64_pool_addr_dump() self.assertEqual(len(addresses), 1) self.assertEqual(addresses[0].address, nat_addr) self.vapi.nat64_add_del_pool_addr_range(nat_addr, nat_addr, is_add=0) addresses = self.vapi.nat64_pool_addr_dump() self.assertEqual(len(addresses), 0) def test_interface(self): """ Enable/disable NAT64 feature on the interface """ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) interfaces = self.vapi.nat64_interface_dump() self.assertEqual(len(interfaces), 2) pg0_found = False pg1_found = False for intf in interfaces: if intf.sw_if_index == self.pg0.sw_if_index: self.assertEqual(intf.is_inside, 1) pg0_found = True elif intf.sw_if_index == self.pg1.sw_if_index: self.assertEqual(intf.is_inside, 0) pg1_found = True self.assertTrue(pg0_found) self.assertTrue(pg1_found) features = self.vapi.cli("show interface features pg0") self.assertNotEqual(features.find('nat64-in2out'), -1) features = self.vapi.cli("show interface features pg1") self.assertNotEqual(features.find('nat64-out2in'), -1) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index, is_add=0) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_add=0) interfaces = self.vapi.nat64_interface_dump() self.assertEqual(len(interfaces), 0) def test_static_bib(self): """ Add/delete static BIB entry """ in_addr = socket.inet_pton(socket.AF_INET6, '2001:db8:85a3::8a2e:370:7334') out_addr = socket.inet_pton(socket.AF_INET, '10.1.1.3') in_port = 1234 out_port = 5678 proto = IP_PROTOS.tcp self.vapi.nat64_add_del_static_bib(in_addr, out_addr, in_port, out_port, proto) bib = self.vapi.nat64_bib_dump(IP_PROTOS.tcp) static_bib_num = 0 for bibe in bib: if bibe.is_static: static_bib_num += 1 self.assertEqual(bibe.i_addr, in_addr) self.assertEqual(bibe.o_addr, out_addr) self.assertEqual(bibe.i_port, in_port) self.assertEqual(bibe.o_port, out_port) self.assertEqual(static_bib_num, 1) self.vapi.nat64_add_del_static_bib(in_addr, out_addr, in_port, out_port, proto, is_add=0) bib = self.vapi.nat64_bib_dump(IP_PROTOS.tcp) static_bib_num = 0 for bibe in bib: if bibe.is_static: static_bib_num += 1 self.assertEqual(static_bib_num, 0) def test_set_timeouts(self): """ Set NAT64 timeouts """ # verify default values timeouts = self.vapi.nat64_get_timeouts() self.assertEqual(timeouts.udp, 300) self.assertEqual(timeouts.icmp, 60) self.assertEqual(timeouts.tcp_trans, 240) self.assertEqual(timeouts.tcp_est, 7440) self.assertEqual(timeouts.tcp_incoming_syn, 6) # set and verify custom values self.vapi.nat64_set_timeouts(udp=200, icmp=30, tcp_trans=250, tcp_est=7450, tcp_incoming_syn=10) timeouts = self.vapi.nat64_get_timeouts() self.assertEqual(timeouts.udp, 200) self.assertEqual(timeouts.icmp, 30) self.assertEqual(timeouts.tcp_trans, 250) self.assertEqual(timeouts.tcp_est, 7450) self.assertEqual(timeouts.tcp_incoming_syn, 10) def test_dynamic(self): """ NAT64 dynamic translation test """ self.tcp_port_in = 6303 self.udp_port_in = 6304 self.icmp_id_in = 6305 ses_num_start = self.nat64_get_ses_num() self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n, self.nat_addr_n) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) # in2out pkts = self.create_stream_in_ip6(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip=self.nat_addr, dst_ip=self.pg1.remote_ip4) # out2in pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4])) self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6) # in2out pkts = self.create_stream_in_ip6(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip=self.nat_addr, dst_ip=self.pg1.remote_ip4) # out2in pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6) ses_num_end = self.nat64_get_ses_num() self.assertEqual(ses_num_end - ses_num_start, 3) # tenant with specific VRF self.vapi.nat64_add_del_pool_addr_range(self.vrf1_nat_addr_n, self.vrf1_nat_addr_n, vrf_id=self.vrf1_id) self.vapi.nat64_add_del_interface(self.pg2.sw_if_index) pkts = self.create_stream_in_ip6(self.pg2, self.pg1) self.pg2.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip=self.vrf1_nat_addr, dst_ip=self.pg1.remote_ip4) pkts = self.create_stream_out(self.pg1, dst_ip=self.vrf1_nat_addr) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg2.get_capture(len(pkts)) self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg2.remote_ip6) def test_static(self): """ NAT64 static translation test """ self.tcp_port_in = 60303 self.udp_port_in = 60304 self.icmp_id_in = 60305 self.tcp_port_out = 60303 self.udp_port_out = 60304 self.icmp_id_out = 60305 ses_num_start = self.nat64_get_ses_num() self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n, self.nat_addr_n) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) self.vapi.nat64_add_del_static_bib(self.pg0.remote_ip6n, self.nat_addr_n, self.tcp_port_in, self.tcp_port_out, IP_PROTOS.tcp) self.vapi.nat64_add_del_static_bib(self.pg0.remote_ip6n, self.nat_addr_n, self.udp_port_in, self.udp_port_out, IP_PROTOS.udp) self.vapi.nat64_add_del_static_bib(self.pg0.remote_ip6n, self.nat_addr_n, self.icmp_id_in, self.icmp_id_out, IP_PROTOS.icmp) # in2out pkts = self.create_stream_in_ip6(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip=self.nat_addr, dst_ip=self.pg1.remote_ip4, same_port=True) # out2in pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4])) self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6) ses_num_end = self.nat64_get_ses_num() self.assertEqual(ses_num_end - ses_num_start, 3) @unittest.skipUnless(running_extended_tests(), "part of extended tests") def test_session_timeout(self): """ NAT64 session timeout """ self.icmp_id_in = 1234 self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n, self.nat_addr_n) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) self.vapi.nat64_set_timeouts(icmp=5) pkts = self.create_stream_in_ip6(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) ses_num_before_timeout = self.nat64_get_ses_num() sleep(15) # ICMP session after timeout ses_num_after_timeout = self.nat64_get_ses_num() self.assertNotEqual(ses_num_before_timeout, ses_num_after_timeout) def test_icmp_error(self): """ NAT64 ICMP Error message translation """ self.tcp_port_in = 6303 self.udp_port_in = 6304 self.icmp_id_in = 6305 ses_num_start = self.nat64_get_ses_num() self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n, self.nat_addr_n) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) # send some packets to create sessions pkts = self.create_stream_in_ip6(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture_ip4 = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture_ip4, nat_ip=self.nat_addr, dst_ip=self.pg1.remote_ip4) pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture_ip6 = self.pg0.get_capture(len(pkts)) ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4])) self.verify_capture_in_ip6(capture_ip6, ip[IPv6].src, self.pg0.remote_ip6) # in2out pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=self.pg0.remote_ip6, dst=ip[IPv6].src) / ICMPv6DestUnreach(code=1) / packet[IPv6] for packet in capture_ip6] 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[IP].src, self.nat_addr) self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) self.assertEqual(packet[ICMP].type, 3) self.assertEqual(packet[ICMP].code, 13) inner = packet[IPerror] self.assertEqual(inner.src, self.pg1.remote_ip4) self.assertEqual(inner.dst, self.nat_addr) self.check_icmp_checksum(packet) if inner.haslayer(TCPerror): self.assertEqual(inner[TCPerror].dport, self.tcp_port_out) elif inner.haslayer(UDPerror): self.assertEqual(inner[UDPerror].dport, self.udp_port_out) else: self.assertEqual(inner[ICMPerror].id, self.icmp_id_out) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # out2in pkts = [Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / ICMP(type=3, code=13) / packet[IP] for packet in capture_ip4] 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, ip.src) self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6) icmp = packet[ICMPv6DestUnreach] self.assertEqual(icmp.code, 1) inner = icmp[IPerror6] self.assertEqual(inner.src, self.pg0.remote_ip6) self.assertEqual(inner.dst, ip.src) self.check_icmpv6_checksum(packet) if inner.haslayer(TCPerror): self.assertEqual(inner[TCPerror].sport, self.tcp_port_in) elif inner.haslayer(UDPerror): self.assertEqual(inner[UDPerror].sport, self.udp_port_in) else: self.assertEqual(inner[ICMPv6EchoRequest].id, self.icmp_id_in) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def test_hairpinning(self): """ NAT64 hairpinning """ client = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] server_tcp_in_port = 22 server_tcp_out_port = 4022 server_udp_in_port = 23 server_udp_out_port = 4023 client_tcp_in_port = 1234 client_udp_in_port = 1235 client_tcp_out_port = 0 client_udp_out_port = 0 ip = IPv6(src=''.join(['64:ff9b::', self.nat_addr])) nat_addr_ip6 = ip.src self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n, self.nat_addr_n) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) self.vapi.nat64_add_del_static_bib(server.ip6n, self.nat_addr_n, server_tcp_in_port, server_tcp_out_port, IP_PROTOS.tcp) self.vapi.nat64_add_del_static_bib(server.ip6n, self.nat_addr_n, server_udp_in_port, server_udp_out_port, IP_PROTOS.udp) # client to server pkts = [] p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=client.ip6, dst=nat_addr_ip6) / TCP(sport=client_tcp_in_port, dport=server_tcp_out_port)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=client.ip6, dst=nat_addr_ip6) / UDP(sport=client_udp_in_port, dport=server_udp_out_port)) pkts.append(p) self.pg0.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, nat_addr_ip6) self.assertEqual(packet[IPv6].dst, server.ip6) if packet.haslayer(TCP): self.assertNotEqual(packet[TCP].sport, client_tcp_in_port) self.assertEqual(packet[TCP].dport, server_tcp_in_port) self.check_tcp_checksum(packet) client_tcp_out_port = packet[TCP].sport else: self.assertNotEqual(packet[UDP].sport, client_udp_in_port) self.assertEqual(packet[UDP].dport, server_udp_in_port) self.check_udp_checksum(packet) client_udp_out_port = packet[UDP].sport except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # server to client pkts = [] p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=server.ip6, dst=nat_addr_ip6) / TCP(sport=server_tcp_in_port, dport=client_tcp_out_port)) pkts.append(p) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=server.ip6, dst=nat_addr_ip6) / UDP(sport=server_udp_in_port, dport=client_udp_out_port)) pkts.append(p) self.pg0.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, nat_addr_ip6) self.assertEqual(packet[IPv6].dst, client.ip6) if packet.haslayer(TCP): self.assertEqual(packet[TCP].sport, server_tcp_out_port) self.assertEqual(packet[TCP].dport, client_tcp_in_port) self.check_tcp_checksum(packet) else: self.assertEqual(packet[UDP].sport, server_udp_out_port) self.assertEqual(packet[UDP].dport, client_udp_in_port) self.check_udp_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # ICMP error pkts = [] pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=client.ip6, dst=nat_addr_ip6) / ICMPv6DestUnreach(code=1) / packet[IPv6] for packet in capture] self.pg0.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, nat_addr_ip6) self.assertEqual(packet[IPv6].dst, server.ip6) icmp = packet[ICMPv6DestUnreach] self.assertEqual(icmp.code, 1) inner = icmp[IPerror6] self.assertEqual(inner.src, server.ip6) self.assertEqual(inner.dst, nat_addr_ip6) self.check_icmpv6_checksum(packet) if inner.haslayer(TCPerror): self.assertEqual(inner[TCPerror].sport, server_tcp_in_port) self.assertEqual(inner[TCPerror].dport, client_tcp_out_port) else: self.assertEqual(inner[UDPerror].sport, server_udp_in_port) self.assertEqual(inner[UDPerror].dport, client_udp_out_port) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def test_prefix(self): """ NAT64 Network-Specific Prefix """ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n, self.nat_addr_n) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) self.vapi.nat64_add_del_pool_addr_range(self.vrf1_nat_addr_n, self.vrf1_nat_addr_n, vrf_id=self.vrf1_id) self.vapi.nat64_add_del_interface(self.pg2.sw_if_index) # Add global prefix global_pref64 = "2001:db8::" global_pref64_n = socket.inet_pton(socket.AF_INET6, global_pref64) global_pref64_len = 32 self.vapi.nat64_add_del_prefix(global_pref64_n, global_pref64_len) prefix = self.vapi.nat64_prefix_dump() self.assertEqual(len(prefix), 1) self.assertEqual(prefix[0].prefix, global_pref64_n) self.assertEqual(prefix[0].prefix_len, global_pref64_len) self.assertEqual(prefix[0].vrf_id, 0) # Add tenant specific prefix vrf1_pref64 = "2001:db8:122:300::" vrf1_pref64_n = socket.inet_pton(socket.AF_INET6, vrf1_pref64) vrf1_pref64_len = 56 self.vapi.nat64_add_del_prefix(vrf1_pref64_n, vrf1_pref64_len, vrf_id=self.vrf1_id) prefix = self.vapi.nat64_prefix_dump() self.assertEqual(len(prefix), 2) # Global prefix pkts = self.create_stream_in_ip6(self.pg0, self.pg1, pref=global_pref64, plen=global_pref64_len) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip=self.nat_addr, dst_ip=self.pg1.remote_ip4) pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) dst_ip = self.compose_ip6(self.pg1.remote_ip4, global_pref64, global_pref64_len) self.verify_capture_in_ip6(capture, dst_ip, self.pg0.remote_ip6) # Tenant specific prefix pkts = self.create_stream_in_ip6(self.pg2, self.pg1, pref=vrf1_pref64, plen=vrf1_pref64_len) self.pg2.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip=self.vrf1_nat_addr, dst_ip=self.pg1.remote_ip4) pkts = self.create_stream_out(self.pg1, dst_ip=self.vrf1_nat_addr) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg2.get_capture(len(pkts)) dst_ip = self.compose_ip6(self.pg1.remote_ip4, vrf1_pref64, vrf1_pref64_len) self.verify_capture_in_ip6(capture, dst_ip, self.pg2.remote_ip6) def test_unknown_proto(self): """ NAT64 translate packet with unknown protocol """ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n, self.nat_addr_n) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) remote_ip6 = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96) # in2out p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=self.pg0.remote_ip6, dst=remote_ip6) / TCP(sport=self.tcp_port_in, dport=20)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg1.get_capture(1) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=self.pg0.remote_ip6, dst=remote_ip6, nh=47) / GRE() / IP(src=self.pg2.local_ip4, dst=self.pg2.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg1.get_capture(1) packet = p[0] try: self.assertEqual(packet[IP].src, self.nat_addr) self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) self.assertTrue(packet.haslayer(GRE)) self.check_ip_checksum(packet) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # out2in p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / GRE() / IP(src=self.pg2.remote_ip4, dst=self.pg2.local_ip4) / TCP(sport=1234, dport=1234)) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IPv6].src, remote_ip6) self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6) self.assertEqual(packet[IPv6].nh, 47) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def test_hairpinning_unknown_proto(self): """ NAT64 translate packet with unknown protocol - hairpinning """ client = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] server_tcp_in_port = 22 server_tcp_out_port = 4022 client_tcp_in_port = 1234 client_tcp_out_port = 1235 server_nat_ip = "10.0.0.100" client_nat_ip = "10.0.0.110" server_nat_ip_n = socket.inet_pton(socket.AF_INET, server_nat_ip) client_nat_ip_n = socket.inet_pton(socket.AF_INET, client_nat_ip) server_nat_ip6 = self.compose_ip6(server_nat_ip, '64:ff9b::', 96) client_nat_ip6 = self.compose_ip6(client_nat_ip, '64:ff9b::', 96) self.vapi.nat64_add_del_pool_addr_range(server_nat_ip_n, client_nat_ip_n) self.vapi.nat64_add_del_interface(self.pg0.sw_if_index) self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0) self.vapi.nat64_add_del_static_bib(server.ip6n, server_nat_ip_n, server_tcp_in_port, server_tcp_out_port, IP_PROTOS.tcp) self.vapi.nat64_add_del_static_bib(server.ip6n, server_nat_ip_n, 0, 0, IP_PROTOS.gre) self.vapi.nat64_add_del_static_bib(client.ip6n, client_nat_ip_n, client_tcp_in_port, client_tcp_out_port, IP_PROTOS.tcp) # client to server p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=client.ip6, dst=server_nat_ip6) / TCP(sport=client_tcp_in_port, dport=server_tcp_out_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=client.ip6, dst=server_nat_ip6, nh=IP_PROTOS.gre) / GRE() / IP(src=self.pg2.local_ip4, dst=self.pg2.remote_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IPv6].src, client_nat_ip6) self.assertEqual(packet[IPv6].dst, server.ip6) self.assertEqual(packet[IPv6].nh, IP_PROTOS.gre) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise # server to client p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IPv6(src=server.ip6, dst=client_nat_ip6, nh=IP_PROTOS.gre) / GRE() / IP(src=self.pg2.remote_ip4, dst=self.pg2.local_ip4) / TCP(sport=1234, dport=1234)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() p = self.pg0.get_capture(1) packet = p[0] try: self.assertEqual(packet[IPv6].src, server_nat_ip6) self.assertEqual(packet[IPv6].dst, client.ip6) self.assertEqual(packet[IPv6].nh, IP_PROTOS.gre) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise def nat64_get_ses_num(self): """ Return number of active NAT64 sessions. """ st = self.vapi.nat64_st_dump() return len(st) def clear_nat64(self): """ Clear NAT64 configuration. """ self.vapi.nat64_set_timeouts() interfaces = self.vapi.nat64_interface_dump() for intf in interfaces: self.vapi.nat64_add_del_interface(intf.sw_if_index, intf.is_inside, is_add=0) bib = self.vapi.nat64_bib_dump(IP_PROTOS.tcp) for bibe in bib: if bibe.is_static: self.vapi.nat64_add_del_static_bib(bibe.i_addr, bibe.o_addr, bibe.i_port, bibe.o_port, bibe.proto, bibe.vrf_id, is_add=0) bib = self.vapi.nat64_bib_dump(IP_PROTOS.udp) for bibe in bib: if bibe.is_static: self.vapi.nat64_add_del_static_bib(bibe.i_addr, bibe.o_addr, bibe.i_port, bibe.o_port, bibe.proto, bibe.vrf_id, is_add=0) bib = self.vapi.nat64_bib_dump(IP_PROTOS.icmp) for bibe in bib: if bibe.is_static: self.vapi.nat64_add_del_static_bib(bibe.i_addr, bibe.o_addr, bibe.i_port, bibe.o_port, bibe.proto, bibe.vrf_id, is_add=0) adresses = self.vapi.nat64_pool_addr_dump() for addr in adresses: self.vapi.nat64_add_del_pool_addr_range(addr.address, addr.address, vrf_id=addr.vrf_id, is_add=0) prefixes = self.vapi.nat64_prefix_dump() for prefix in prefixes: self.vapi.nat64_add_del_prefix(prefix.prefix, prefix.prefix_len, vrf_id=prefix.vrf_id, is_add=0) def tearDown(self): super(TestNAT64, self).tearDown() if not self.vpp_dead: self.logger.info(self.vapi.cli("show nat64 pool")) self.logger.info(self.vapi.cli("show nat64 interfaces")) self.logger.info(self.vapi.cli("show nat64 prefix")) self.logger.info(self.vapi.cli("show nat64 bib all")) self.logger.info(self.vapi.cli("show nat64 session table all")) self.clear_nat64() if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)