- def test_464xlat_ce(self):
- """ Test 464XLAT CE with NAT44 """
-
- nat_config = self.vapi.nat_show_config()
- self.assertEqual(1, nat_config.out2in_dpo)
-
- self.configure_xlat()
-
- flags = self.config_flags.NAT_IS_INSIDE
- self.vapi.nat44_interface_add_del_feature(
- sw_if_index=self.pg0.sw_if_index,
- flags=flags, is_add=1)
- self.vapi.nat44_add_del_address_range(first_ip_address=self.nat_addr_n,
- last_ip_address=self.nat_addr_n,
- vrf_id=0xFFFFFFFF, is_add=1)
-
- out_src_ip6 = self.compose_ip6(self.dst_ip4, self.dst_ip6_pfx,
- self.dst_ip6_pfx_len)
- out_dst_ip6 = self.compose_ip6(self.nat_addr, self.src_ip6_pfx,
- self.src_ip6_pfx_len)
-
- try:
- pkts = self.create_stream_in(self.pg0, self.pg1, self.dst_ip4)
- 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_ip6(capture, nat_ip=out_dst_ip6,
- dst_ip=out_src_ip6)
-
- pkts = self.create_stream_out_ip6(self.pg1, out_src_ip6,
- out_dst_ip6)
- 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)
- finally:
- self.vapi.nat44_interface_add_del_feature(
- sw_if_index=self.pg0.sw_if_index,
- flags=flags)
- self.vapi.nat44_add_del_address_range(
- first_ip_address=self.nat_addr_n,
- last_ip_address=self.nat_addr_n,
- vrf_id=0xFFFFFFFF)
-
- @unittest.skip('Temporary disabled')
- def test_464xlat_ce_no_nat(self):
- """ Test 464XLAT CE without NAT44 """
-
- self.configure_xlat()
-
- out_src_ip6 = self.compose_ip6(self.dst_ip4, self.dst_ip6_pfx,
- self.dst_ip6_pfx_len)
- out_dst_ip6 = self.compose_ip6(self.pg0.remote_ip4, self.src_ip6_pfx,
- self.src_ip6_pfx_len)
-
- pkts = self.create_stream_in(self.pg0, self.pg1, self.dst_ip4)
- 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_ip6(capture, dst_ip=out_src_ip6,
- nat_ip=out_dst_ip6, same_port=True)
-
- pkts = self.create_stream_out_ip6(self.pg1, out_src_ip6, out_dst_ip6)
- 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)
-
-
-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()
- cls.vapi.cli("set log class nat level debug")
-
- 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()
-
- @classmethod
- def tearDownClass(cls):
- super(TestDeterministicNAT, cls).tearDownClass()
-
- 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):
- """
- Verify captured packets on outside network
-
- :param capture: Captured packets
- :param nat_ip: Translated IP address (Default use global NAT address)
- :param same_port: Source port number is not translated (Default False)
- """
- if nat_ip is None:
- nat_ip = self.nat_addr
- 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 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_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(is_add=1, in_addr=in_addr,
- in_plen=in_plen, out_addr=out_addr,
- out_plen=out_plen)
-
- rep1 = self.vapi.nat_det_forward(in_addr_t)
- self.assertEqual(str(rep1.out_addr), out_addr)
- rep2 = self.vapi.nat_det_reverse(rep1.out_port_hi, out_addr)
-
- self.assertEqual(str(rep2.in_addr), in_addr_t)
-
- deterministic_mappings = self.vapi.nat_det_map_dump()
- self.assertEqual(len(deterministic_mappings), 1)
- dsm = deterministic_mappings[0]
- self.assertEqual(in_addr, str(dsm.in_addr))
- self.assertEqual(in_plen, dsm.in_plen)
- self.assertEqual(out_addr, str(dsm.out_addr))
- 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_get_timeouts()
-
- self.vapi.nat_set_timeouts(
- udp=timeouts_before.udp + 10,
- tcp_established=timeouts_before.tcp_established + 10,
- tcp_transitory=timeouts_before.tcp_transitory + 10,
- icmp=timeouts_before.icmp + 10)
-
- timeouts_after = self.vapi.nat_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(is_add=1, in_addr=self.pg0.remote_ip4,
- in_plen=32,
- out_addr=socket.inet_aton(nat_ip),
- out_plen=32)
-
- flags = self.config_flags.NAT_IS_INSIDE
- self.vapi.nat44_interface_add_del_feature(
- sw_if_index=self.pg0.sw_if_index,
- flags=flags, is_add=1)
- self.vapi.nat44_interface_add_del_feature(
- sw_if_index=self.pg1.sw_if_index,
- is_add=1)
-
- # 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_ip4)
- self.assertEqual(len(sessions), 3)
-
- # TCP session
- s = sessions[0]
- self.assertEqual(str(s.ext_addr), self.pg1.remote_ip4)
- 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(str(s.ext_addr), self.pg1.remote_ip4)
- 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(str(s.ext_addr), self.pg1.remote_ip4)
- 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(is_add=1, in_addr=host0.ip4, in_plen=24,
- out_addr=socket.inet_aton(nat_ip),
- out_plen=32)
- flags = self.config_flags.NAT_IS_INSIDE
- self.vapi.nat44_interface_add_del_feature(
- sw_if_index=self.pg0.sw_if_index,
- flags=flags, is_add=1)
- self.vapi.nat44_interface_add_del_feature(
- sw_if_index=self.pg1.sw_if_index,
- is_add=1)
-
- # 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_ip4,
- external_port)
- dms = self.vapi.nat_det_map_dump()
- self.assertEqual(dms[0].ses_num, 1)
-
- self.vapi.nat_det_close_session_in(host0.ip4,
- port_in,
- self.pg1.remote_ip4,
- 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(is_add=1, in_addr=self.pg0.remote_ip4,
- in_plen=32,
- out_addr=socket.inet_aton(self.nat_addr),
- out_plen=32)
- flags = self.config_flags.NAT_IS_INSIDE
- self.vapi.nat44_interface_add_del_feature(
- sw_if_index=self.pg0.sw_if_index,
- flags=flags, is_add=1)
- self.vapi.nat44_interface_add_del_feature(
- sw_if_index=self.pg1.sw_if_index,
- is_add=1)
-
- 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)