5 from random import randint, shuffle, choice
8 from framework import VppTestCase, VppTestRunner
9 from scapy.data import IP_PROTOS
10 from scapy.layers.inet import IP, TCP, UDP, ICMP, GRE
11 from scapy.layers.inet import IPerror, TCPerror
12 from scapy.layers.l2 import Ether
13 from scapy.packet import Raw
14 from syslog_rfc5424_parser import SyslogMessage, ParseError
15 from syslog_rfc5424_parser.constants import SyslogSeverity
16 from util import ppp, ip4_range
17 from vpp_acl import AclRule, VppAcl, VppAclInterface
18 from vpp_ip_route import VppIpRoute, VppRoutePath
19 from vpp_papi import VppEnum
22 class NAT44EDTestCase(VppTestCase):
35 tcp_external_port = 80
40 super(NAT44EDTestCase, self).setUp()
44 super(NAT44EDTestCase, self).tearDown()
48 def plugin_enable(self):
49 self.vapi.nat44_ed_plugin_enable_disable(
50 sessions=self.max_sessions, enable=1)
52 def plugin_disable(self):
53 self.vapi.nat44_ed_plugin_enable_disable(enable=0)
56 def config_flags(self):
57 return VppEnum.vl_api_nat_config_flags_t
60 def nat44_config_flags(self):
61 return VppEnum.vl_api_nat44_config_flags_t
64 def syslog_severity(self):
65 return VppEnum.vl_api_syslog_severity_t
68 def server_addr(self):
69 return self.pg1.remote_hosts[0].ip4
73 return randint(1025, 65535)
76 def proto2layer(proto):
77 if proto == IP_PROTOS.tcp:
79 elif proto == IP_PROTOS.udp:
81 elif proto == IP_PROTOS.icmp:
84 raise Exception("Unsupported protocol")
87 def create_and_add_ip4_table(cls, i, table_id=0):
88 cls.vapi.ip_table_add_del(is_add=1, table={'table_id': table_id})
89 i.set_table_ip4(table_id)
92 def configure_ip4_interface(cls, i, hosts=0, table_id=None):
94 cls.create_and_add_ip4_table(i, table_id)
101 i.generate_remote_hosts(hosts)
102 i.configure_ipv4_neighbors()
105 def nat_add_interface_address(cls, i):
106 cls.vapi.nat44_add_del_interface_addr(
107 sw_if_index=i.sw_if_index, is_add=1)
109 def nat_add_inside_interface(self, i):
110 self.vapi.nat44_interface_add_del_feature(
111 flags=self.config_flags.NAT_IS_INSIDE,
112 sw_if_index=i.sw_if_index, is_add=1)
114 def nat_add_outside_interface(self, i):
115 self.vapi.nat44_interface_add_del_feature(
116 flags=self.config_flags.NAT_IS_OUTSIDE,
117 sw_if_index=i.sw_if_index, is_add=1)
119 def nat_add_address(self, address, twice_nat=0,
120 vrf_id=0xFFFFFFFF, is_add=1):
121 flags = self.config_flags.NAT_IS_TWICE_NAT if twice_nat else 0
122 self.vapi.nat44_add_del_address_range(first_ip_address=address,
123 last_ip_address=address,
128 def nat_add_static_mapping(self, local_ip, external_ip='0.0.0.0',
129 local_port=0, external_port=0, vrf_id=0,
130 is_add=1, external_sw_if_index=0xFFFFFFFF,
131 proto=0, tag="", flags=0):
133 if not (local_port and external_port):
134 flags |= self.config_flags.NAT_IS_ADDR_ONLY
136 self.vapi.nat44_add_del_static_mapping(
138 local_ip_address=local_ip,
139 external_ip_address=external_ip,
140 external_sw_if_index=external_sw_if_index,
141 local_port=local_port,
142 external_port=external_port,
143 vrf_id=vrf_id, protocol=proto,
149 super(NAT44EDTestCase, cls).setUpClass()
151 cls.create_pg_interfaces(range(12))
152 cls.interfaces = list(cls.pg_interfaces[:4])
154 cls.create_and_add_ip4_table(cls.pg2, 10)
156 for i in cls.interfaces:
157 cls.configure_ip4_interface(i, hosts=3)
159 # test specific (test-multiple-vrf)
160 cls.vapi.ip_table_add_del(is_add=1, table={'table_id': 1})
162 # test specific (test-one-armed-nat44-static)
163 cls.pg4.generate_remote_hosts(2)
165 cls.vapi.sw_interface_add_del_address(
166 sw_if_index=cls.pg4.sw_if_index,
167 prefix="10.0.0.1/24")
169 cls.pg4.resolve_arp()
170 cls.pg4._remote_hosts[1]._ip4 = cls.pg4._remote_hosts[0]._ip4
171 cls.pg4.resolve_arp()
173 # test specific interface (pg5)
174 cls.pg5._local_ip4 = "10.1.1.1"
175 cls.pg5._remote_hosts[0]._ip4 = "10.1.1.2"
176 cls.pg5.set_table_ip4(1)
179 cls.pg5.resolve_arp()
181 # test specific interface (pg6)
182 cls.pg6._local_ip4 = "10.1.2.1"
183 cls.pg6._remote_hosts[0]._ip4 = "10.1.2.2"
184 cls.pg6.set_table_ip4(1)
187 cls.pg6.resolve_arp()
191 rl.append(VppIpRoute(cls, "0.0.0.0", 0,
192 [VppRoutePath("0.0.0.0", 0xffffffff,
194 register=False, table_id=1))
195 rl.append(VppIpRoute(cls, "0.0.0.0", 0,
196 [VppRoutePath(cls.pg1.local_ip4,
197 cls.pg1.sw_if_index)],
199 rl.append(VppIpRoute(cls, cls.pg5.remote_ip4, 32,
200 [VppRoutePath("0.0.0.0",
201 cls.pg5.sw_if_index)],
202 register=False, table_id=1))
203 rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 32,
204 [VppRoutePath("0.0.0.0",
205 cls.pg6.sw_if_index)],
206 register=False, table_id=1))
207 rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 16,
208 [VppRoutePath("0.0.0.0", 0xffffffff,
210 register=False, table_id=0))
215 def get_err_counter(self, path):
216 return self.statistics.get_err_counter(path)
218 def reass_hairpinning(self, server_addr, server_in_port, server_out_port,
219 host_in_port, proto=IP_PROTOS.tcp,
221 layer = self.proto2layer(proto)
223 if proto == IP_PROTOS.tcp:
224 data = b"A" * 4 + b"B" * 16 + b"C" * 3
226 data = b"A" * 16 + b"B" * 16 + b"C" * 3
228 # send packet from host to server
229 pkts = self.create_stream_frag(self.pg0,
235 self.pg0.add_stream(pkts)
236 self.pg_enable_capture(self.pg_interfaces)
238 frags = self.pg0.get_capture(len(pkts))
239 p = self.reass_frags_and_verify(frags,
242 if proto != IP_PROTOS.icmp:
244 self.assertNotEqual(p[layer].sport, host_in_port)
245 self.assertEqual(p[layer].dport, server_in_port)
248 self.assertNotEqual(p[layer].id, host_in_port)
249 self.assertEqual(data, p[Raw].load)
251 def frag_out_of_order(self, proto=IP_PROTOS.tcp, dont_translate=False,
253 layer = self.proto2layer(proto)
255 if proto == IP_PROTOS.tcp:
256 data = b"A" * 4 + b"B" * 16 + b"C" * 3
258 data = b"A" * 16 + b"B" * 16 + b"C" * 3
259 self.port_in = self.random_port()
263 pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4,
264 self.port_in, 20, data, proto)
266 self.pg0.add_stream(pkts)
267 self.pg_enable_capture(self.pg_interfaces)
269 frags = self.pg1.get_capture(len(pkts))
270 if not dont_translate:
271 p = self.reass_frags_and_verify(frags,
275 p = self.reass_frags_and_verify(frags,
278 if proto != IP_PROTOS.icmp:
279 if not dont_translate:
280 self.assertEqual(p[layer].dport, 20)
282 self.assertNotEqual(p[layer].sport, self.port_in)
284 self.assertEqual(p[layer].sport, self.port_in)
287 if not dont_translate:
288 self.assertNotEqual(p[layer].id, self.port_in)
290 self.assertEqual(p[layer].id, self.port_in)
291 self.assertEqual(data, p[Raw].load)
294 if not dont_translate:
295 dst_addr = self.nat_addr
297 dst_addr = self.pg0.remote_ip4
298 if proto != IP_PROTOS.icmp:
300 dport = p[layer].sport
304 pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport,
305 data, proto, echo_reply=True)
307 self.pg1.add_stream(pkts)
308 self.pg_enable_capture(self.pg_interfaces)
309 self.logger.info(self.vapi.cli("show trace"))
311 frags = self.pg0.get_capture(len(pkts))
312 p = self.reass_frags_and_verify(frags,
315 if proto != IP_PROTOS.icmp:
316 self.assertEqual(p[layer].sport, 20)
317 self.assertEqual(p[layer].dport, self.port_in)
319 self.assertEqual(p[layer].id, self.port_in)
320 self.assertEqual(data, p[Raw].load)
322 def reass_frags_and_verify(self, frags, src, dst):
325 self.assertEqual(p[IP].src, src)
326 self.assertEqual(p[IP].dst, dst)
327 self.assert_ip_checksum_valid(p)
328 buffer.seek(p[IP].frag * 8)
329 buffer.write(bytes(p[IP].payload))
330 ip = IP(src=frags[0][IP].src, dst=frags[0][IP].dst,
331 proto=frags[0][IP].proto)
332 if ip.proto == IP_PROTOS.tcp:
333 p = (ip / TCP(buffer.getvalue()))
334 self.logger.debug(ppp("Reassembled:", p))
335 self.assert_tcp_checksum_valid(p)
336 elif ip.proto == IP_PROTOS.udp:
337 p = (ip / UDP(buffer.getvalue()[:8]) /
338 Raw(buffer.getvalue()[8:]))
339 elif ip.proto == IP_PROTOS.icmp:
340 p = (ip / ICMP(buffer.getvalue()))
343 def frag_in_order(self, proto=IP_PROTOS.tcp, dont_translate=False,
345 layer = self.proto2layer(proto)
347 if proto == IP_PROTOS.tcp:
348 data = b"A" * 4 + b"B" * 16 + b"C" * 3
350 data = b"A" * 16 + b"B" * 16 + b"C" * 3
351 self.port_in = self.random_port()
354 pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4,
355 self.port_in, 20, data, proto)
356 self.pg0.add_stream(pkts)
357 self.pg_enable_capture(self.pg_interfaces)
359 frags = self.pg1.get_capture(len(pkts))
360 if not dont_translate:
361 p = self.reass_frags_and_verify(frags,
365 p = self.reass_frags_and_verify(frags,
368 if proto != IP_PROTOS.icmp:
369 if not dont_translate:
370 self.assertEqual(p[layer].dport, 20)
372 self.assertNotEqual(p[layer].sport, self.port_in)
374 self.assertEqual(p[layer].sport, self.port_in)
377 if not dont_translate:
378 self.assertNotEqual(p[layer].id, self.port_in)
380 self.assertEqual(p[layer].id, self.port_in)
381 self.assertEqual(data, p[Raw].load)
384 if not dont_translate:
385 dst_addr = self.nat_addr
387 dst_addr = self.pg0.remote_ip4
388 if proto != IP_PROTOS.icmp:
390 dport = p[layer].sport
394 pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport, data,
395 proto, echo_reply=True)
396 self.pg1.add_stream(pkts)
397 self.pg_enable_capture(self.pg_interfaces)
399 frags = self.pg0.get_capture(len(pkts))
400 p = self.reass_frags_and_verify(frags,
403 if proto != IP_PROTOS.icmp:
404 self.assertEqual(p[layer].sport, 20)
405 self.assertEqual(p[layer].dport, self.port_in)
407 self.assertEqual(p[layer].id, self.port_in)
408 self.assertEqual(data, p[Raw].load)
410 def verify_capture_out(self, capture, nat_ip=None, same_port=False,
411 dst_ip=None, ignore_port=False):
413 nat_ip = self.nat_addr
414 for packet in capture:
416 self.assert_packet_checksums_valid(packet)
417 self.assertEqual(packet[IP].src, nat_ip)
418 if dst_ip is not None:
419 self.assertEqual(packet[IP].dst, dst_ip)
420 if packet.haslayer(TCP):
424 packet[TCP].sport, self.tcp_port_in)
427 packet[TCP].sport, self.tcp_port_in)
428 self.tcp_port_out = packet[TCP].sport
429 self.assert_packet_checksums_valid(packet)
430 elif packet.haslayer(UDP):
434 packet[UDP].sport, self.udp_port_in)
437 packet[UDP].sport, self.udp_port_in)
438 self.udp_port_out = packet[UDP].sport
443 packet[ICMP].id, self.icmp_id_in)
446 packet[ICMP].id, self.icmp_id_in)
447 self.icmp_id_out = packet[ICMP].id
448 self.assert_packet_checksums_valid(packet)
450 self.logger.error(ppp("Unexpected or invalid packet "
451 "(outside network):", packet))
454 def verify_capture_in(self, capture, in_if):
455 for packet in capture:
457 self.assert_packet_checksums_valid(packet)
458 self.assertEqual(packet[IP].dst, in_if.remote_ip4)
459 if packet.haslayer(TCP):
460 self.assertEqual(packet[TCP].dport, self.tcp_port_in)
461 elif packet.haslayer(UDP):
462 self.assertEqual(packet[UDP].dport, self.udp_port_in)
464 self.assertEqual(packet[ICMP].id, self.icmp_id_in)
466 self.logger.error(ppp("Unexpected or invalid packet "
467 "(inside network):", packet))
470 def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64):
472 dst_ip = out_if.remote_ip4
476 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
477 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
478 TCP(sport=self.tcp_port_in, dport=20))
482 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
483 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
484 UDP(sport=self.udp_port_in, dport=20))
488 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
489 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
490 ICMP(id=self.icmp_id_in, type='echo-request'))
495 def create_stream_out(self, out_if, dst_ip=None, ttl=64,
496 use_inside_ports=False):
498 dst_ip = self.nat_addr
499 if not use_inside_ports:
500 tcp_port = self.tcp_port_out
501 udp_port = self.udp_port_out
502 icmp_id = self.icmp_id_out
504 tcp_port = self.tcp_port_in
505 udp_port = self.udp_port_in
506 icmp_id = self.icmp_id_in
509 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
510 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
511 TCP(dport=tcp_port, sport=20))
515 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
516 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
517 UDP(dport=udp_port, sport=20))
521 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
522 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
523 ICMP(id=icmp_id, type='echo-reply'))
528 def create_tcp_stream(self, in_if, out_if, count):
532 for i in range(count):
533 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
534 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=64) /
535 TCP(sport=port + i, dport=20))
540 def create_stream_frag(self, src_if, dst, sport, dport, data,
541 proto=IP_PROTOS.tcp, echo_reply=False):
542 if proto == IP_PROTOS.tcp:
543 p = (IP(src=src_if.remote_ip4, dst=dst) /
544 TCP(sport=sport, dport=dport) /
546 p = p.__class__(scapy.compat.raw(p))
547 chksum = p[TCP].chksum
548 proto_header = TCP(sport=sport, dport=dport, chksum=chksum)
549 elif proto == IP_PROTOS.udp:
550 proto_header = UDP(sport=sport, dport=dport)
551 elif proto == IP_PROTOS.icmp:
553 proto_header = ICMP(id=sport, type='echo-request')
555 proto_header = ICMP(id=sport, type='echo-reply')
557 raise Exception("Unsupported protocol")
558 id = self.random_port()
560 if proto == IP_PROTOS.tcp:
563 raw = Raw(data[0:16])
564 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
565 IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=0, id=id) /
569 if proto == IP_PROTOS.tcp:
570 raw = Raw(data[4:20])
572 raw = Raw(data[16:32])
573 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
574 IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=3, id=id,
578 if proto == IP_PROTOS.tcp:
582 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
583 IP(src=src_if.remote_ip4, dst=dst, frag=5, proto=proto,
589 def frag_in_order_in_plus_out(self, in_addr, out_addr, in_port, out_port,
590 proto=IP_PROTOS.tcp):
592 layer = self.proto2layer(proto)
594 if proto == IP_PROTOS.tcp:
595 data = b"A" * 4 + b"B" * 16 + b"C" * 3
597 data = b"A" * 16 + b"B" * 16 + b"C" * 3
598 port_in = self.random_port()
602 pkts = self.create_stream_frag(self.pg0, out_addr,
605 self.pg0.add_stream(pkts)
606 self.pg_enable_capture(self.pg_interfaces)
608 frags = self.pg1.get_capture(len(pkts))
609 p = self.reass_frags_and_verify(frags,
612 if proto != IP_PROTOS.icmp:
613 self.assertEqual(p[layer].sport, port_in)
614 self.assertEqual(p[layer].dport, in_port)
616 self.assertEqual(p[layer].id, port_in)
617 self.assertEqual(data, p[Raw].load)
620 if proto != IP_PROTOS.icmp:
621 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
623 p[layer].sport, data, proto)
625 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
626 p[layer].id, 0, data, proto,
628 self.pg1.add_stream(pkts)
629 self.pg_enable_capture(self.pg_interfaces)
631 frags = self.pg0.get_capture(len(pkts))
632 p = self.reass_frags_and_verify(frags,
635 if proto != IP_PROTOS.icmp:
636 self.assertEqual(p[layer].sport, out_port)
637 self.assertEqual(p[layer].dport, port_in)
639 self.assertEqual(p[layer].id, port_in)
640 self.assertEqual(data, p[Raw].load)
642 def frag_out_of_order_in_plus_out(self, in_addr, out_addr, in_port,
643 out_port, proto=IP_PROTOS.tcp):
645 layer = self.proto2layer(proto)
647 if proto == IP_PROTOS.tcp:
648 data = b"A" * 4 + b"B" * 16 + b"C" * 3
650 data = b"A" * 16 + b"B" * 16 + b"C" * 3
651 port_in = self.random_port()
655 pkts = self.create_stream_frag(self.pg0, out_addr,
659 self.pg0.add_stream(pkts)
660 self.pg_enable_capture(self.pg_interfaces)
662 frags = self.pg1.get_capture(len(pkts))
663 p = self.reass_frags_and_verify(frags,
666 if proto != IP_PROTOS.icmp:
667 self.assertEqual(p[layer].dport, in_port)
668 self.assertEqual(p[layer].sport, port_in)
669 self.assertEqual(p[layer].dport, in_port)
671 self.assertEqual(p[layer].id, port_in)
672 self.assertEqual(data, p[Raw].load)
675 if proto != IP_PROTOS.icmp:
676 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
678 p[layer].sport, data, proto)
680 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
681 p[layer].id, 0, data, proto,
684 self.pg1.add_stream(pkts)
685 self.pg_enable_capture(self.pg_interfaces)
687 frags = self.pg0.get_capture(len(pkts))
688 p = self.reass_frags_and_verify(frags,
691 if proto != IP_PROTOS.icmp:
692 self.assertEqual(p[layer].sport, out_port)
693 self.assertEqual(p[layer].dport, port_in)
695 self.assertEqual(p[layer].id, port_in)
696 self.assertEqual(data, p[Raw].load)
698 def init_tcp_session(self, in_if, out_if, in_port, ext_port):
700 p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
701 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
702 TCP(sport=in_port, dport=ext_port, flags="S"))
704 self.pg_enable_capture(self.pg_interfaces)
706 capture = out_if.get_capture(1)
708 out_port = p[TCP].sport
710 # SYN + ACK packet out->in
711 p = (Ether(src=out_if.remote_mac, dst=out_if.local_mac) /
712 IP(src=out_if.remote_ip4, dst=self.nat_addr) /
713 TCP(sport=ext_port, dport=out_port, flags="SA"))
715 self.pg_enable_capture(self.pg_interfaces)
720 p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
721 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
722 TCP(sport=in_port, dport=ext_port, flags="A"))
724 self.pg_enable_capture(self.pg_interfaces)
726 out_if.get_capture(1)
730 def twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False,
732 twice_nat_addr = '10.0.1.3'
740 port_in1 = port_in + 1
741 port_in2 = port_in + 2
746 server1 = self.pg0.remote_hosts[0]
747 server2 = self.pg0.remote_hosts[1]
759 eh_translate = ((not self_twice_nat) or (not lb and same_pg) or
762 self.nat_add_address(self.nat_addr)
763 self.nat_add_address(twice_nat_addr, twice_nat=1)
767 flags |= self.config_flags.NAT_IS_SELF_TWICE_NAT
769 flags |= self.config_flags.NAT_IS_TWICE_NAT
772 self.nat_add_static_mapping(pg0.remote_ip4, self.nat_addr,
777 locals = [{'addr': server1.ip4,
781 {'addr': server2.ip4,
785 out_addr = self.nat_addr
787 self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags,
788 external_addr=out_addr,
789 external_port=port_out,
790 protocol=IP_PROTOS.tcp,
791 local_num=len(locals),
793 self.nat_add_inside_interface(pg0)
794 self.nat_add_outside_interface(pg1)
800 assert client_id is not None
802 client = self.pg0.remote_hosts[0]
804 client = self.pg0.remote_hosts[1]
806 client = pg1.remote_hosts[0]
807 p = (Ether(src=pg1.remote_mac, dst=pg1.local_mac) /
808 IP(src=client.ip4, dst=self.nat_addr) /
809 TCP(sport=eh_port_out, dport=port_out))
811 self.pg_enable_capture(self.pg_interfaces)
813 capture = pg0.get_capture(1)
819 if ip.dst == server1.ip4:
825 self.assertEqual(ip.dst, server.ip4)
827 self.assertIn(tcp.dport, [port_in1, port_in2])
829 self.assertEqual(tcp.dport, port_in)
831 self.assertEqual(ip.src, twice_nat_addr)
832 self.assertNotEqual(tcp.sport, eh_port_out)
834 self.assertEqual(ip.src, client.ip4)
835 self.assertEqual(tcp.sport, eh_port_out)
837 eh_port_in = tcp.sport
838 saved_port_in = tcp.dport
839 self.assert_packet_checksums_valid(p)
841 self.logger.error(ppp("Unexpected or invalid packet:", p))
844 p = (Ether(src=server.mac, dst=pg0.local_mac) /
845 IP(src=server.ip4, dst=eh_addr_in) /
846 TCP(sport=saved_port_in, dport=eh_port_in))
848 self.pg_enable_capture(self.pg_interfaces)
850 capture = pg1.get_capture(1)
855 self.assertEqual(ip.dst, client.ip4)
856 self.assertEqual(ip.src, self.nat_addr)
857 self.assertEqual(tcp.dport, eh_port_out)
858 self.assertEqual(tcp.sport, port_out)
859 self.assert_packet_checksums_valid(p)
861 self.logger.error(ppp("Unexpected or invalid packet:", p))
865 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
866 self.assertEqual(len(sessions), 1)
867 self.assertTrue(sessions[0].flags &
868 self.config_flags.NAT_IS_EXT_HOST_VALID)
869 self.assertTrue(sessions[0].flags &
870 self.config_flags.NAT_IS_TWICE_NAT)
871 self.logger.info(self.vapi.cli("show nat44 sessions"))
872 self.vapi.nat44_del_session(
873 address=sessions[0].inside_ip_address,
874 port=sessions[0].inside_port,
875 protocol=sessions[0].protocol,
876 flags=(self.config_flags.NAT_IS_INSIDE |
877 self.config_flags.NAT_IS_EXT_HOST_VALID),
878 ext_host_address=sessions[0].ext_host_nat_address,
879 ext_host_port=sessions[0].ext_host_nat_port)
880 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
881 self.assertEqual(len(sessions), 0)
883 def verify_syslog_sess(self, data, is_add=True, is_ip6=False):
884 message = data.decode('utf-8')
886 message = SyslogMessage.parse(message)
887 except ParseError as e:
891 self.assertEqual(message.severity, SyslogSeverity.info)
892 self.assertEqual(message.appname, 'NAT')
893 self.assertEqual(message.msgid, 'SADD' if is_add else 'SDEL')
894 sd_params = message.sd.get('nsess')
895 self.assertTrue(sd_params is not None)
897 self.assertEqual(sd_params.get('IATYP'), 'IPv6')
898 self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip6)
900 self.assertEqual(sd_params.get('IATYP'), 'IPv4')
901 self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4)
902 self.assertTrue(sd_params.get('SSUBIX') is not None)
903 self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in)
904 self.assertEqual(sd_params.get('XATYP'), 'IPv4')
905 self.assertEqual(sd_params.get('XSADDR'), self.nat_addr)
906 self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out)
907 self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp)
908 self.assertEqual(sd_params.get('SVLAN'), '0')
909 self.assertEqual(sd_params.get('XDADDR'), self.pg1.remote_ip4)
910 self.assertEqual(sd_params.get('XDPORT'),
911 "%d" % self.tcp_external_port)
914 class TestNAT44ED(NAT44EDTestCase):
915 """ NAT44ED Test Case """
917 def test_icmp_error(self):
918 """ NAT44ED test ICMP error message with inner header"""
922 self.nat_add_address(self.nat_addr)
923 self.nat_add_inside_interface(self.pg0)
924 self.nat_add_outside_interface(self.pg1)
926 # in2out (initiate connection)
927 p1 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
928 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
929 UDP(sport=21, dport=20) / payload)
931 self.pg0.add_stream(p1)
932 self.pg_enable_capture(self.pg_interfaces)
934 capture = self.pg1.get_capture(1)[0]
936 # out2in (send error message)
937 p2 = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
938 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
939 ICMP(type='dest-unreach', code='port-unreachable') /
942 self.pg1.add_stream(p2)
943 self.pg_enable_capture(self.pg_interfaces)
946 capture = self.pg0.get_capture(1)[0]
948 self.logger.info(ppp("p1 packet:", p1))
949 self.logger.info(ppp("p2 packet:", p2))
950 self.logger.info(ppp("capture packet:", capture))
952 def test_users_dump(self):
953 """ NAT44ED API test - nat44_user_dump """
955 self.nat_add_address(self.nat_addr)
956 self.nat_add_inside_interface(self.pg0)
957 self.nat_add_outside_interface(self.pg1)
959 self.vapi.nat44_forwarding_enable_disable(enable=1)
961 local_ip = self.pg0.remote_ip4
962 external_ip = self.nat_addr
963 self.nat_add_static_mapping(local_ip, external_ip)
965 users = self.vapi.nat44_user_dump()
966 self.assertEqual(len(users), 0)
968 # in2out - static mapping match
970 pkts = self.create_stream_out(self.pg1)
971 self.pg1.add_stream(pkts)
972 self.pg_enable_capture(self.pg_interfaces)
974 capture = self.pg0.get_capture(len(pkts))
975 self.verify_capture_in(capture, self.pg0)
977 pkts = self.create_stream_in(self.pg0, self.pg1)
978 self.pg0.add_stream(pkts)
979 self.pg_enable_capture(self.pg_interfaces)
981 capture = self.pg1.get_capture(len(pkts))
982 self.verify_capture_out(capture, same_port=True)
984 users = self.vapi.nat44_user_dump()
985 self.assertEqual(len(users), 1)
986 static_user = users[0]
987 self.assertEqual(static_user.nstaticsessions, 3)
988 self.assertEqual(static_user.nsessions, 0)
990 # in2out - no static mapping match (forwarding test)
992 host0 = self.pg0.remote_hosts[0]
993 self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
995 pkts = self.create_stream_out(self.pg1,
996 dst_ip=self.pg0.remote_ip4,
997 use_inside_ports=True)
998 self.pg1.add_stream(pkts)
999 self.pg_enable_capture(self.pg_interfaces)
1001 capture = self.pg0.get_capture(len(pkts))
1002 self.verify_capture_in(capture, self.pg0)
1004 pkts = self.create_stream_in(self.pg0, self.pg1)
1005 self.pg0.add_stream(pkts)
1006 self.pg_enable_capture(self.pg_interfaces)
1008 capture = self.pg1.get_capture(len(pkts))
1009 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1012 self.pg0.remote_hosts[0] = host0
1014 users = self.vapi.nat44_user_dump()
1015 self.assertEqual(len(users), 2)
1016 if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4:
1017 non_static_user = users[1]
1018 static_user = users[0]
1020 non_static_user = users[0]
1021 static_user = users[1]
1022 self.assertEqual(static_user.nstaticsessions, 3)
1023 self.assertEqual(static_user.nsessions, 0)
1024 self.assertEqual(non_static_user.nstaticsessions, 0)
1025 self.assertEqual(non_static_user.nsessions, 3)
1027 users = self.vapi.nat44_user_dump()
1028 self.assertEqual(len(users), 2)
1029 if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4:
1030 non_static_user = users[1]
1031 static_user = users[0]
1033 non_static_user = users[0]
1034 static_user = users[1]
1035 self.assertEqual(static_user.nstaticsessions, 3)
1036 self.assertEqual(static_user.nsessions, 0)
1037 self.assertEqual(non_static_user.nstaticsessions, 0)
1038 self.assertEqual(non_static_user.nsessions, 3)
1040 def test_frag_out_of_order_do_not_translate(self):
1041 """ NAT44ED don't translate fragments arriving out of order """
1042 self.nat_add_inside_interface(self.pg0)
1043 self.nat_add_outside_interface(self.pg1)
1044 self.vapi.nat44_forwarding_enable_disable(enable=True)
1045 self.frag_out_of_order(proto=IP_PROTOS.tcp, dont_translate=True)
1047 def test_forwarding(self):
1048 """ NAT44ED forwarding test """
1050 self.nat_add_inside_interface(self.pg0)
1051 self.nat_add_outside_interface(self.pg1)
1052 self.vapi.nat44_forwarding_enable_disable(enable=1)
1054 real_ip = self.pg0.remote_ip4
1055 alias_ip = self.nat_addr
1056 flags = self.config_flags.NAT_IS_ADDR_ONLY
1057 self.vapi.nat44_add_del_static_mapping(is_add=1,
1058 local_ip_address=real_ip,
1059 external_ip_address=alias_ip,
1060 external_sw_if_index=0xFFFFFFFF,
1064 # in2out - static mapping match
1066 pkts = self.create_stream_out(self.pg1)
1067 self.pg1.add_stream(pkts)
1068 self.pg_enable_capture(self.pg_interfaces)
1070 capture = self.pg0.get_capture(len(pkts))
1071 self.verify_capture_in(capture, self.pg0)
1073 pkts = self.create_stream_in(self.pg0, self.pg1)
1074 self.pg0.add_stream(pkts)
1075 self.pg_enable_capture(self.pg_interfaces)
1077 capture = self.pg1.get_capture(len(pkts))
1078 self.verify_capture_out(capture, same_port=True)
1080 # in2out - no static mapping match
1082 host0 = self.pg0.remote_hosts[0]
1083 self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
1085 pkts = self.create_stream_out(self.pg1,
1086 dst_ip=self.pg0.remote_ip4,
1087 use_inside_ports=True)
1088 self.pg1.add_stream(pkts)
1089 self.pg_enable_capture(self.pg_interfaces)
1091 capture = self.pg0.get_capture(len(pkts))
1092 self.verify_capture_in(capture, self.pg0)
1094 pkts = self.create_stream_in(self.pg0, self.pg1)
1095 self.pg0.add_stream(pkts)
1096 self.pg_enable_capture(self.pg_interfaces)
1098 capture = self.pg1.get_capture(len(pkts))
1099 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1102 self.pg0.remote_hosts[0] = host0
1104 user = self.pg0.remote_hosts[1]
1105 sessions = self.vapi.nat44_user_session_dump(user.ip4, 0)
1106 self.assertEqual(len(sessions), 3)
1107 self.assertTrue(sessions[0].flags &
1108 self.config_flags.NAT_IS_EXT_HOST_VALID)
1109 self.vapi.nat44_del_session(
1110 address=sessions[0].inside_ip_address,
1111 port=sessions[0].inside_port,
1112 protocol=sessions[0].protocol,
1113 flags=(self.config_flags.NAT_IS_INSIDE |
1114 self.config_flags.NAT_IS_EXT_HOST_VALID),
1115 ext_host_address=sessions[0].ext_host_address,
1116 ext_host_port=sessions[0].ext_host_port)
1117 sessions = self.vapi.nat44_user_session_dump(user.ip4, 0)
1118 self.assertEqual(len(sessions), 2)
1121 self.vapi.nat44_forwarding_enable_disable(enable=0)
1122 flags = self.config_flags.NAT_IS_ADDR_ONLY
1123 self.vapi.nat44_add_del_static_mapping(
1125 local_ip_address=real_ip,
1126 external_ip_address=alias_ip,
1127 external_sw_if_index=0xFFFFFFFF,
1130 def test_output_feature_and_service2(self):
1131 """ NAT44ED interface output feature and service host direct access """
1132 self.vapi.nat44_forwarding_enable_disable(enable=1)
1133 self.nat_add_address(self.nat_addr)
1135 self.vapi.nat44_interface_add_del_output_feature(
1136 sw_if_index=self.pg1.sw_if_index, is_add=1,)
1138 # session initiated from service host - translate
1139 pkts = self.create_stream_in(self.pg0, self.pg1)
1140 self.pg0.add_stream(pkts)
1141 self.pg_enable_capture(self.pg_interfaces)
1143 capture = self.pg1.get_capture(len(pkts))
1144 self.verify_capture_out(capture, ignore_port=True)
1146 pkts = self.create_stream_out(self.pg1)
1147 self.pg1.add_stream(pkts)
1148 self.pg_enable_capture(self.pg_interfaces)
1150 capture = self.pg0.get_capture(len(pkts))
1151 self.verify_capture_in(capture, self.pg0)
1153 # session initiated from remote host - do not translate
1154 tcp_port_in = self.tcp_port_in
1155 udp_port_in = self.udp_port_in
1156 icmp_id_in = self.icmp_id_in
1158 self.tcp_port_in = 60303
1159 self.udp_port_in = 60304
1160 self.icmp_id_in = 60305
1163 pkts = self.create_stream_out(self.pg1,
1164 self.pg0.remote_ip4,
1165 use_inside_ports=True)
1166 self.pg1.add_stream(pkts)
1167 self.pg_enable_capture(self.pg_interfaces)
1169 capture = self.pg0.get_capture(len(pkts))
1170 self.verify_capture_in(capture, self.pg0)
1172 pkts = self.create_stream_in(self.pg0, self.pg1)
1173 self.pg0.add_stream(pkts)
1174 self.pg_enable_capture(self.pg_interfaces)
1176 capture = self.pg1.get_capture(len(pkts))
1177 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1180 self.tcp_port_in = tcp_port_in
1181 self.udp_port_in = udp_port_in
1182 self.icmp_id_in = icmp_id_in
1184 def test_twice_nat(self):
1185 """ NAT44ED Twice NAT """
1186 self.twice_nat_common()
1188 def test_self_twice_nat_positive(self):
1189 """ NAT44ED Self Twice NAT (positive test) """
1190 self.twice_nat_common(self_twice_nat=True, same_pg=True)
1192 def test_self_twice_nat_lb_positive(self):
1193 """ NAT44ED Self Twice NAT local service load balancing (positive test)
1195 self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True,
1198 def test_twice_nat_lb(self):
1199 """ NAT44ED Twice NAT local service load balancing """
1200 self.twice_nat_common(lb=True)
1202 def test_output_feature(self):
1203 """ NAT44ED interface output feature (in2out postrouting) """
1204 self.vapi.nat44_forwarding_enable_disable(enable=1)
1205 self.nat_add_address(self.nat_addr)
1207 self.nat_add_outside_interface(self.pg0)
1208 self.vapi.nat44_interface_add_del_output_feature(
1209 sw_if_index=self.pg1.sw_if_index, is_add=1)
1212 pkts = self.create_stream_in(self.pg0, self.pg1)
1213 self.pg0.add_stream(pkts)
1214 self.pg_enable_capture(self.pg_interfaces)
1216 capture = self.pg1.get_capture(len(pkts))
1217 self.verify_capture_out(capture, ignore_port=True)
1218 self.logger.debug(self.vapi.cli("show trace"))
1221 pkts = self.create_stream_out(self.pg1)
1222 self.pg1.add_stream(pkts)
1223 self.pg_enable_capture(self.pg_interfaces)
1225 capture = self.pg0.get_capture(len(pkts))
1226 self.verify_capture_in(capture, self.pg0)
1227 self.logger.debug(self.vapi.cli("show trace"))
1230 pkts = self.create_stream_in(self.pg0, self.pg1, ttl=2)
1231 self.pg0.add_stream(pkts)
1232 self.pg_enable_capture(self.pg_interfaces)
1234 capture = self.pg1.get_capture(len(pkts))
1235 self.verify_capture_out(capture, ignore_port=True)
1236 self.logger.debug(self.vapi.cli("show trace"))
1239 pkts = self.create_stream_out(self.pg1, ttl=2)
1240 self.pg1.add_stream(pkts)
1241 self.pg_enable_capture(self.pg_interfaces)
1243 capture = self.pg0.get_capture(len(pkts))
1244 self.verify_capture_in(capture, self.pg0)
1245 self.logger.debug(self.vapi.cli("show trace"))
1248 pkts = self.create_stream_in(self.pg0, self.pg1, ttl=1)
1249 self.pg0.add_stream(pkts)
1250 self.pg_enable_capture(self.pg_interfaces)
1252 capture = self.pg0.get_capture(len(pkts))
1254 self.assertIn(ICMP, p)
1255 self.assertEqual(p[ICMP].type, 11) # 11 == time-exceeded
1257 def test_static_with_port_out2(self):
1258 """ NAT44ED 1:1 NAPT asymmetrical rule """
1263 self.vapi.nat44_forwarding_enable_disable(enable=1)
1264 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1265 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
1266 local_port, external_port,
1267 proto=IP_PROTOS.tcp, flags=flags)
1269 self.nat_add_inside_interface(self.pg0)
1270 self.nat_add_outside_interface(self.pg1)
1272 # from client to service
1273 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1274 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1275 TCP(sport=12345, dport=external_port))
1276 self.pg1.add_stream(p)
1277 self.pg_enable_capture(self.pg_interfaces)
1279 capture = self.pg0.get_capture(1)
1284 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1285 self.assertEqual(tcp.dport, local_port)
1286 self.assert_packet_checksums_valid(p)
1288 self.logger.error(ppp("Unexpected or invalid packet:", p))
1292 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
1293 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1294 ICMP(type=11) / capture[0][IP])
1295 self.pg0.add_stream(p)
1296 self.pg_enable_capture(self.pg_interfaces)
1298 capture = self.pg1.get_capture(1)
1301 self.assertEqual(p[IP].src, self.nat_addr)
1303 self.assertEqual(inner.dst, self.nat_addr)
1304 self.assertEqual(inner[TCPerror].dport, external_port)
1306 self.logger.error(ppp("Unexpected or invalid packet:", p))
1309 # from service back to client
1310 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1311 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1312 TCP(sport=local_port, dport=12345))
1313 self.pg0.add_stream(p)
1314 self.pg_enable_capture(self.pg_interfaces)
1316 capture = self.pg1.get_capture(1)
1321 self.assertEqual(ip.src, self.nat_addr)
1322 self.assertEqual(tcp.sport, external_port)
1323 self.assert_packet_checksums_valid(p)
1325 self.logger.error(ppp("Unexpected or invalid packet:", p))
1329 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1330 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1331 ICMP(type=11) / capture[0][IP])
1332 self.pg1.add_stream(p)
1333 self.pg_enable_capture(self.pg_interfaces)
1335 capture = self.pg0.get_capture(1)
1338 self.assertEqual(p[IP].dst, self.pg0.remote_ip4)
1340 self.assertEqual(inner.src, self.pg0.remote_ip4)
1341 self.assertEqual(inner[TCPerror].sport, local_port)
1343 self.logger.error(ppp("Unexpected or invalid packet:", p))
1346 # from client to server (no translation)
1347 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1348 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
1349 TCP(sport=12346, dport=local_port))
1350 self.pg1.add_stream(p)
1351 self.pg_enable_capture(self.pg_interfaces)
1353 capture = self.pg0.get_capture(1)
1358 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1359 self.assertEqual(tcp.dport, local_port)
1360 self.assert_packet_checksums_valid(p)
1362 self.logger.error(ppp("Unexpected or invalid packet:", p))
1365 # from service back to client (no translation)
1366 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1367 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1368 TCP(sport=local_port, dport=12346))
1369 self.pg0.add_stream(p)
1370 self.pg_enable_capture(self.pg_interfaces)
1372 capture = self.pg1.get_capture(1)
1377 self.assertEqual(ip.src, self.pg0.remote_ip4)
1378 self.assertEqual(tcp.sport, local_port)
1379 self.assert_packet_checksums_valid(p)
1381 self.logger.error(ppp("Unexpected or invalid packet:", p))
1384 def test_static_lb(self):
1385 """ NAT44ED local service load balancing """
1386 external_addr_n = self.nat_addr
1389 server1 = self.pg0.remote_hosts[0]
1390 server2 = self.pg0.remote_hosts[1]
1392 locals = [{'addr': server1.ip4,
1396 {'addr': server2.ip4,
1401 self.nat_add_address(self.nat_addr)
1402 self.vapi.nat44_add_del_lb_static_mapping(
1404 external_addr=external_addr_n,
1405 external_port=external_port,
1406 protocol=IP_PROTOS.tcp,
1407 local_num=len(locals),
1409 flags = self.config_flags.NAT_IS_INSIDE
1410 self.vapi.nat44_interface_add_del_feature(
1411 sw_if_index=self.pg0.sw_if_index,
1412 flags=flags, is_add=1)
1413 self.vapi.nat44_interface_add_del_feature(
1414 sw_if_index=self.pg1.sw_if_index,
1417 # from client to service
1418 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1419 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1420 TCP(sport=12345, dport=external_port))
1421 self.pg1.add_stream(p)
1422 self.pg_enable_capture(self.pg_interfaces)
1424 capture = self.pg0.get_capture(1)
1430 self.assertIn(ip.dst, [server1.ip4, server2.ip4])
1431 if ip.dst == server1.ip4:
1435 self.assertEqual(tcp.dport, local_port)
1436 self.assert_packet_checksums_valid(p)
1438 self.logger.error(ppp("Unexpected or invalid packet:", p))
1441 # from service back to client
1442 p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
1443 IP(src=server.ip4, dst=self.pg1.remote_ip4) /
1444 TCP(sport=local_port, dport=12345))
1445 self.pg0.add_stream(p)
1446 self.pg_enable_capture(self.pg_interfaces)
1448 capture = self.pg1.get_capture(1)
1453 self.assertEqual(ip.src, self.nat_addr)
1454 self.assertEqual(tcp.sport, external_port)
1455 self.assert_packet_checksums_valid(p)
1457 self.logger.error(ppp("Unexpected or invalid packet:", p))
1460 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
1461 self.assertEqual(len(sessions), 1)
1462 self.assertTrue(sessions[0].flags &
1463 self.config_flags.NAT_IS_EXT_HOST_VALID)
1464 self.vapi.nat44_del_session(
1465 address=sessions[0].inside_ip_address,
1466 port=sessions[0].inside_port,
1467 protocol=sessions[0].protocol,
1468 flags=(self.config_flags.NAT_IS_INSIDE |
1469 self.config_flags.NAT_IS_EXT_HOST_VALID),
1470 ext_host_address=sessions[0].ext_host_address,
1471 ext_host_port=sessions[0].ext_host_port)
1472 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
1473 self.assertEqual(len(sessions), 0)
1475 def test_static_lb_2(self):
1476 """ NAT44ED local service load balancing (asymmetrical rule) """
1477 external_addr = self.nat_addr
1480 server1 = self.pg0.remote_hosts[0]
1481 server2 = self.pg0.remote_hosts[1]
1483 locals = [{'addr': server1.ip4,
1487 {'addr': server2.ip4,
1492 self.vapi.nat44_forwarding_enable_disable(enable=1)
1493 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1494 self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags,
1495 external_addr=external_addr,
1496 external_port=external_port,
1497 protocol=IP_PROTOS.tcp,
1498 local_num=len(locals),
1500 flags = self.config_flags.NAT_IS_INSIDE
1501 self.vapi.nat44_interface_add_del_feature(
1502 sw_if_index=self.pg0.sw_if_index,
1503 flags=flags, is_add=1)
1504 self.vapi.nat44_interface_add_del_feature(
1505 sw_if_index=self.pg1.sw_if_index,
1508 # from client to service
1509 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1510 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1511 TCP(sport=12345, dport=external_port))
1512 self.pg1.add_stream(p)
1513 self.pg_enable_capture(self.pg_interfaces)
1515 capture = self.pg0.get_capture(1)
1521 self.assertIn(ip.dst, [server1.ip4, server2.ip4])
1522 if ip.dst == server1.ip4:
1526 self.assertEqual(tcp.dport, local_port)
1527 self.assert_packet_checksums_valid(p)
1529 self.logger.error(ppp("Unexpected or invalid packet:", p))
1532 # from service back to client
1533 p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
1534 IP(src=server.ip4, dst=self.pg1.remote_ip4) /
1535 TCP(sport=local_port, dport=12345))
1536 self.pg0.add_stream(p)
1537 self.pg_enable_capture(self.pg_interfaces)
1539 capture = self.pg1.get_capture(1)
1544 self.assertEqual(ip.src, self.nat_addr)
1545 self.assertEqual(tcp.sport, external_port)
1546 self.assert_packet_checksums_valid(p)
1548 self.logger.error(ppp("Unexpected or invalid packet:", p))
1551 # from client to server (no translation)
1552 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1553 IP(src=self.pg1.remote_ip4, dst=server1.ip4) /
1554 TCP(sport=12346, dport=local_port))
1555 self.pg1.add_stream(p)
1556 self.pg_enable_capture(self.pg_interfaces)
1558 capture = self.pg0.get_capture(1)
1564 self.assertEqual(ip.dst, server1.ip4)
1565 self.assertEqual(tcp.dport, local_port)
1566 self.assert_packet_checksums_valid(p)
1568 self.logger.error(ppp("Unexpected or invalid packet:", p))
1571 # from service back to client (no translation)
1572 p = (Ether(src=server1.mac, dst=self.pg0.local_mac) /
1573 IP(src=server1.ip4, dst=self.pg1.remote_ip4) /
1574 TCP(sport=local_port, dport=12346))
1575 self.pg0.add_stream(p)
1576 self.pg_enable_capture(self.pg_interfaces)
1578 capture = self.pg1.get_capture(1)
1583 self.assertEqual(ip.src, server1.ip4)
1584 self.assertEqual(tcp.sport, local_port)
1585 self.assert_packet_checksums_valid(p)
1587 self.logger.error(ppp("Unexpected or invalid packet:", p))
1590 def test_lb_affinity(self):
1591 """ NAT44ED local service load balancing affinity """
1592 external_addr = self.nat_addr
1595 server1 = self.pg0.remote_hosts[0]
1596 server2 = self.pg0.remote_hosts[1]
1598 locals = [{'addr': server1.ip4,
1602 {'addr': server2.ip4,
1607 self.nat_add_address(self.nat_addr)
1608 self.vapi.nat44_add_del_lb_static_mapping(is_add=1,
1609 external_addr=external_addr,
1610 external_port=external_port,
1611 protocol=IP_PROTOS.tcp,
1613 local_num=len(locals),
1615 flags = self.config_flags.NAT_IS_INSIDE
1616 self.vapi.nat44_interface_add_del_feature(
1617 sw_if_index=self.pg0.sw_if_index,
1618 flags=flags, is_add=1)
1619 self.vapi.nat44_interface_add_del_feature(
1620 sw_if_index=self.pg1.sw_if_index,
1623 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1624 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1625 TCP(sport=1025, dport=external_port))
1626 self.pg1.add_stream(p)
1627 self.pg_enable_capture(self.pg_interfaces)
1629 capture = self.pg0.get_capture(1)
1630 backend = capture[0][IP].dst
1632 sessions = self.vapi.nat44_user_session_dump(backend, 0)
1633 self.assertEqual(len(sessions), 1)
1634 self.assertTrue(sessions[0].flags &
1635 self.config_flags.NAT_IS_EXT_HOST_VALID)
1636 self.vapi.nat44_del_session(
1637 address=sessions[0].inside_ip_address,
1638 port=sessions[0].inside_port,
1639 protocol=sessions[0].protocol,
1640 flags=(self.config_flags.NAT_IS_INSIDE |
1641 self.config_flags.NAT_IS_EXT_HOST_VALID),
1642 ext_host_address=sessions[0].ext_host_address,
1643 ext_host_port=sessions[0].ext_host_port)
1646 for port in range(1030, 1100):
1647 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1648 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1649 TCP(sport=port, dport=external_port))
1651 self.pg1.add_stream(pkts)
1652 self.pg_enable_capture(self.pg_interfaces)
1654 capture = self.pg0.get_capture(len(pkts))
1656 self.assertEqual(p[IP].dst, backend)
1658 def test_multiple_vrf_1(self):
1659 """ Multiple VRF - both client & service in VRF1 """
1661 external_addr = '1.2.3.4'
1666 flags = self.config_flags.NAT_IS_INSIDE
1667 self.vapi.nat44_interface_add_del_feature(
1668 sw_if_index=self.pg5.sw_if_index,
1670 self.vapi.nat44_interface_add_del_feature(
1671 sw_if_index=self.pg5.sw_if_index,
1672 is_add=1, flags=flags)
1673 self.vapi.nat44_interface_add_del_feature(
1674 sw_if_index=self.pg6.sw_if_index,
1676 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1677 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1678 local_port, external_port, vrf_id=1,
1679 proto=IP_PROTOS.tcp, flags=flags)
1681 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1682 IP(src=self.pg6.remote_ip4, dst=external_addr) /
1683 TCP(sport=12345, dport=external_port))
1684 self.pg6.add_stream(p)
1685 self.pg_enable_capture(self.pg_interfaces)
1687 capture = self.pg5.get_capture(1)
1692 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1693 self.assertEqual(tcp.dport, local_port)
1694 self.assert_packet_checksums_valid(p)
1696 self.logger.error(ppp("Unexpected or invalid packet:", p))
1699 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1700 IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) /
1701 TCP(sport=local_port, dport=12345))
1702 self.pg5.add_stream(p)
1703 self.pg_enable_capture(self.pg_interfaces)
1705 capture = self.pg6.get_capture(1)
1710 self.assertEqual(ip.src, external_addr)
1711 self.assertEqual(tcp.sport, external_port)
1712 self.assert_packet_checksums_valid(p)
1714 self.logger.error(ppp("Unexpected or invalid packet:", p))
1717 def test_multiple_vrf_2(self):
1718 """ Multiple VRF - dynamic NAT from VRF1 to VRF0 (output-feature) """
1720 external_addr = '1.2.3.4'
1725 self.nat_add_address(self.nat_addr)
1726 flags = self.config_flags.NAT_IS_INSIDE
1727 self.vapi.nat44_interface_add_del_output_feature(
1728 sw_if_index=self.pg1.sw_if_index,
1730 self.vapi.nat44_interface_add_del_feature(
1731 sw_if_index=self.pg5.sw_if_index,
1733 self.vapi.nat44_interface_add_del_feature(
1734 sw_if_index=self.pg5.sw_if_index,
1735 is_add=1, flags=flags)
1736 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1737 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1738 local_port, external_port, vrf_id=1,
1739 proto=IP_PROTOS.tcp, flags=flags)
1741 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1742 IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) /
1743 TCP(sport=2345, dport=22))
1744 self.pg5.add_stream(p)
1745 self.pg_enable_capture(self.pg_interfaces)
1747 capture = self.pg1.get_capture(1)
1752 self.assertEqual(ip.src, self.nat_addr)
1753 self.assert_packet_checksums_valid(p)
1756 self.logger.error(ppp("Unexpected or invalid packet:", p))
1759 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1760 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1761 TCP(sport=22, dport=port))
1762 self.pg1.add_stream(p)
1763 self.pg_enable_capture(self.pg_interfaces)
1765 capture = self.pg5.get_capture(1)
1770 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1771 self.assertEqual(tcp.dport, 2345)
1772 self.assert_packet_checksums_valid(p)
1774 self.logger.error(ppp("Unexpected or invalid packet:", p))
1777 def test_multiple_vrf_3(self):
1778 """ Multiple VRF - client in VRF1, service in VRF0 """
1780 external_addr = '1.2.3.4'
1785 flags = self.config_flags.NAT_IS_INSIDE
1786 self.vapi.nat44_interface_add_del_feature(
1787 sw_if_index=self.pg0.sw_if_index,
1789 self.vapi.nat44_interface_add_del_feature(
1790 sw_if_index=self.pg0.sw_if_index,
1791 is_add=1, flags=flags)
1792 self.vapi.nat44_interface_add_del_feature(
1793 sw_if_index=self.pg6.sw_if_index,
1795 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1796 self.nat_add_static_mapping(
1797 self.pg0.remote_ip4,
1798 external_sw_if_index=self.pg0.sw_if_index,
1799 local_port=local_port,
1801 external_port=external_port,
1802 proto=IP_PROTOS.tcp,
1806 # from client VRF1 to service VRF0
1807 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1808 IP(src=self.pg6.remote_ip4, dst=self.pg0.local_ip4) /
1809 TCP(sport=12346, dport=external_port))
1810 self.pg6.add_stream(p)
1811 self.pg_enable_capture(self.pg_interfaces)
1813 capture = self.pg0.get_capture(1)
1818 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1819 self.assertEqual(tcp.dport, local_port)
1820 self.assert_packet_checksums_valid(p)
1822 self.logger.error(ppp("Unexpected or invalid packet:", p))
1825 # from service VRF0 back to client VRF1
1826 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1827 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1828 TCP(sport=local_port, dport=12346))
1829 self.pg0.add_stream(p)
1830 self.pg_enable_capture(self.pg_interfaces)
1832 capture = self.pg6.get_capture(1)
1837 self.assertEqual(ip.src, self.pg0.local_ip4)
1838 self.assertEqual(tcp.sport, external_port)
1839 self.assert_packet_checksums_valid(p)
1841 self.logger.error(ppp("Unexpected or invalid packet:", p))
1844 def test_multiple_vrf_4(self):
1845 """ Multiple VRF - client in VRF0, service in VRF1 """
1847 external_addr = '1.2.3.4'
1852 flags = self.config_flags.NAT_IS_INSIDE
1853 self.vapi.nat44_interface_add_del_feature(
1854 sw_if_index=self.pg0.sw_if_index,
1856 self.vapi.nat44_interface_add_del_feature(
1857 sw_if_index=self.pg0.sw_if_index,
1858 is_add=1, flags=flags)
1859 self.vapi.nat44_interface_add_del_feature(
1860 sw_if_index=self.pg5.sw_if_index,
1862 self.vapi.nat44_interface_add_del_feature(
1863 sw_if_index=self.pg5.sw_if_index,
1864 is_add=1, flags=flags)
1865 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1866 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1867 local_port, external_port, vrf_id=1,
1868 proto=IP_PROTOS.tcp, flags=flags)
1870 # from client VRF0 to service VRF1
1871 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1872 IP(src=self.pg0.remote_ip4, dst=external_addr) /
1873 TCP(sport=12347, dport=external_port))
1874 self.pg0.add_stream(p)
1875 self.pg_enable_capture(self.pg_interfaces)
1877 capture = self.pg5.get_capture(1)
1882 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1883 self.assertEqual(tcp.dport, local_port)
1884 self.assert_packet_checksums_valid(p)
1886 self.logger.error(ppp("Unexpected or invalid packet:", p))
1889 # from service VRF1 back to client VRF0
1890 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1891 IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) /
1892 TCP(sport=local_port, dport=12347))
1893 self.pg5.add_stream(p)
1894 self.pg_enable_capture(self.pg_interfaces)
1896 capture = self.pg0.get_capture(1)
1901 self.assertEqual(ip.src, external_addr)
1902 self.assertEqual(tcp.sport, external_port)
1903 self.assert_packet_checksums_valid(p)
1905 self.logger.error(ppp("Unexpected or invalid packet:", p))
1908 def test_multiple_vrf_5(self):
1909 """ Multiple VRF - forwarding - no translation """
1911 external_addr = '1.2.3.4'
1916 self.vapi.nat44_forwarding_enable_disable(enable=1)
1917 flags = self.config_flags.NAT_IS_INSIDE
1918 self.vapi.nat44_interface_add_del_feature(
1919 sw_if_index=self.pg0.sw_if_index,
1921 self.vapi.nat44_interface_add_del_feature(
1922 sw_if_index=self.pg0.sw_if_index,
1923 is_add=1, flags=flags)
1924 self.vapi.nat44_interface_add_del_feature(
1925 sw_if_index=self.pg5.sw_if_index,
1927 self.vapi.nat44_interface_add_del_feature(
1928 sw_if_index=self.pg5.sw_if_index,
1929 is_add=1, flags=flags)
1930 self.vapi.nat44_interface_add_del_feature(
1931 sw_if_index=self.pg6.sw_if_index,
1933 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1934 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1935 local_port, external_port, vrf_id=1,
1936 proto=IP_PROTOS.tcp, flags=flags)
1937 self.nat_add_static_mapping(
1938 self.pg0.remote_ip4,
1939 external_sw_if_index=self.pg0.sw_if_index,
1940 local_port=local_port,
1942 external_port=external_port,
1943 proto=IP_PROTOS.tcp,
1947 # from client to server (both VRF1, no translation)
1948 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1949 IP(src=self.pg6.remote_ip4, dst=self.pg5.remote_ip4) /
1950 TCP(sport=12348, dport=local_port))
1951 self.pg6.add_stream(p)
1952 self.pg_enable_capture(self.pg_interfaces)
1954 capture = self.pg5.get_capture(1)
1959 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1960 self.assertEqual(tcp.dport, local_port)
1961 self.assert_packet_checksums_valid(p)
1963 self.logger.error(ppp("Unexpected or invalid packet:", p))
1966 # from server back to client (both VRF1, no translation)
1967 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1968 IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) /
1969 TCP(sport=local_port, dport=12348))
1970 self.pg5.add_stream(p)
1971 self.pg_enable_capture(self.pg_interfaces)
1973 capture = self.pg6.get_capture(1)
1978 self.assertEqual(ip.src, self.pg5.remote_ip4)
1979 self.assertEqual(tcp.sport, local_port)
1980 self.assert_packet_checksums_valid(p)
1982 self.logger.error(ppp("Unexpected or invalid packet:", p))
1985 # from client VRF1 to server VRF0 (no translation)
1986 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1987 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1988 TCP(sport=local_port, dport=12349))
1989 self.pg0.add_stream(p)
1990 self.pg_enable_capture(self.pg_interfaces)
1992 capture = self.pg6.get_capture(1)
1997 self.assertEqual(ip.src, self.pg0.remote_ip4)
1998 self.assertEqual(tcp.sport, local_port)
1999 self.assert_packet_checksums_valid(p)
2001 self.logger.error(ppp("Unexpected or invalid packet:", p))
2004 # from server VRF0 back to client VRF1 (no translation)
2005 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2006 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
2007 TCP(sport=local_port, dport=12349))
2008 self.pg0.add_stream(p)
2009 self.pg_enable_capture(self.pg_interfaces)
2011 capture = self.pg6.get_capture(1)
2016 self.assertEqual(ip.src, self.pg0.remote_ip4)
2017 self.assertEqual(tcp.sport, local_port)
2018 self.assert_packet_checksums_valid(p)
2020 self.logger.error(ppp("Unexpected or invalid packet:", p))
2023 # from client VRF0 to server VRF1 (no translation)
2024 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2025 IP(src=self.pg0.remote_ip4, dst=self.pg5.remote_ip4) /
2026 TCP(sport=12344, dport=local_port))
2027 self.pg0.add_stream(p)
2028 self.pg_enable_capture(self.pg_interfaces)
2030 capture = self.pg5.get_capture(1)
2035 self.assertEqual(ip.dst, self.pg5.remote_ip4)
2036 self.assertEqual(tcp.dport, local_port)
2037 self.assert_packet_checksums_valid(p)
2039 self.logger.error(ppp("Unexpected or invalid packet:", p))
2042 # from server VRF1 back to client VRF0 (no translation)
2043 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
2044 IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) /
2045 TCP(sport=local_port, dport=12344))
2046 self.pg5.add_stream(p)
2047 self.pg_enable_capture(self.pg_interfaces)
2049 capture = self.pg0.get_capture(1)
2054 self.assertEqual(ip.src, self.pg5.remote_ip4)
2055 self.assertEqual(tcp.sport, local_port)
2056 self.assert_packet_checksums_valid(p)
2058 self.logger.error(ppp("Unexpected or invalid packet:", p))
2061 def test_outside_address_distribution(self):
2062 """ Outside address distribution based on source address """
2067 for i in range(1, x):
2069 nat_addresses.append(a)
2071 self.nat_add_inside_interface(self.pg0)
2072 self.nat_add_outside_interface(self.pg1)
2074 self.vapi.nat44_add_del_address_range(
2075 first_ip_address=nat_addresses[0],
2076 last_ip_address=nat_addresses[-1],
2077 vrf_id=0xFFFFFFFF, is_add=1, flags=0)
2079 self.pg0.generate_remote_hosts(x)
2083 info = self.create_packet_info(self.pg0, self.pg1)
2084 payload = self.info_to_payload(info)
2085 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2086 IP(src=self.pg0.remote_hosts[i].ip4,
2087 dst=self.pg1.remote_ip4) /
2088 UDP(sport=7000+i, dport=8000+i) /
2093 self.pg0.add_stream(pkts)
2094 self.pg_enable_capture(self.pg_interfaces)
2096 recvd = self.pg1.get_capture(len(pkts))
2097 for p_recvd in recvd:
2098 payload_info = self.payload_to_info(p_recvd[Raw])
2099 packet_index = payload_info.index
2100 info = self._packet_infos[packet_index]
2101 self.assertTrue(info is not None)
2102 self.assertEqual(packet_index, info.index)
2104 packed = socket.inet_aton(p_sent[IP].src)
2105 numeric = struct.unpack("!L", packed)[0]
2106 numeric = socket.htonl(numeric)
2107 a = nat_addresses[(numeric-1) % len(nat_addresses)]
2110 "Invalid packet (src IP %s translated to %s, but expected %s)"
2111 % (p_sent[IP].src, p_recvd[IP].src, a))
2114 class TestNAT44EDMW(TestNAT44ED):
2115 """ NAT44ED MW Test Case """
2116 vpp_worker_count = 4
2119 @unittest.skip('MW fix required')
2120 def test_users_dump(self):
2121 """ NAT44ED API test - nat44_user_dump """
2123 @unittest.skip('MW fix required')
2124 def test_frag_out_of_order_do_not_translate(self):
2125 """ NAT44ED don't translate fragments arriving out of order """
2127 @unittest.skip('MW fix required')
2128 def test_forwarding(self):
2129 """ NAT44ED forwarding test """
2131 @unittest.skip('MW fix required')
2132 def test_twice_nat(self):
2133 """ NAT44ED Twice NAT """
2135 @unittest.skip('MW fix required')
2136 def test_twice_nat_lb(self):
2137 """ NAT44ED Twice NAT local service load balancing """
2139 @unittest.skip('MW fix required')
2140 def test_output_feature(self):
2141 """ NAT44ED interface output feature (in2out postrouting) """
2143 @unittest.skip('MW fix required')
2144 def test_static_with_port_out2(self):
2145 """ NAT44ED 1:1 NAPT asymmetrical rule """
2147 @unittest.skip('MW fix required')
2148 def test_output_feature_and_service2(self):
2149 """ NAT44ED interface output feature and service host direct access """
2151 @unittest.skip('MW fix required')
2152 def test_static_lb(self):
2153 """ NAT44ED local service load balancing """
2155 @unittest.skip('MW fix required')
2156 def test_static_lb_2(self):
2157 """ NAT44ED local service load balancing (asymmetrical rule) """
2159 @unittest.skip('MW fix required')
2160 def test_lb_affinity(self):
2161 """ NAT44ED local service load balancing affinity """
2163 @unittest.skip('MW fix required')
2164 def test_multiple_vrf(self):
2165 """ NAT44ED Multiple VRF setup """
2167 @unittest.skip('MW fix required')
2168 def test_self_twice_nat_positive(self):
2169 """ NAT44ED Self Twice NAT (positive test) """
2171 @unittest.skip('MW fix required')
2172 def test_self_twice_nat_lb_positive(self):
2173 """ NAT44ED Self Twice NAT local service load balancing (positive test)
2176 def test_dynamic(self):
2177 """ NAT44ED dynamic translation test """
2179 tcp_port_offset = 20
2180 udp_port_offset = 20
2183 self.nat_add_address(self.nat_addr)
2184 self.nat_add_inside_interface(self.pg0)
2185 self.nat_add_outside_interface(self.pg1)
2188 tc1 = self.statistics['/nat44-ed/in2out/slowpath/tcp']
2189 uc1 = self.statistics['/nat44-ed/in2out/slowpath/udp']
2190 ic1 = self.statistics['/nat44-ed/in2out/slowpath/icmp']
2191 dc1 = self.statistics['/nat44-ed/in2out/slowpath/drops']
2193 i2o_pkts = [[] for x in range(0, self.vpp_worker_count)]
2195 for i in range(pkt_count):
2196 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2197 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2198 TCP(sport=tcp_port_offset + i, dport=20))
2199 i2o_pkts[p[TCP].sport % self.vpp_worker_count].append(p)
2201 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2202 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2203 UDP(sport=udp_port_offset + i, dport=20))
2204 i2o_pkts[p[UDP].sport % self.vpp_worker_count].append(p)
2206 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2207 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2208 ICMP(id=icmp_id_offset + i, type='echo-request'))
2209 i2o_pkts[p[ICMP].id % self.vpp_worker_count].append(p)
2211 for i in range(0, self.vpp_worker_count):
2212 if len(i2o_pkts[i]) > 0:
2213 self.pg0.add_stream(i2o_pkts[i], worker=i)
2215 self.pg_enable_capture(self.pg_interfaces)
2217 capture = self.pg1.get_capture(pkt_count * 3)
2219 if_idx = self.pg0.sw_if_index
2220 tc2 = self.statistics['/nat44-ed/in2out/slowpath/tcp']
2221 uc2 = self.statistics['/nat44-ed/in2out/slowpath/udp']
2222 ic2 = self.statistics['/nat44-ed/in2out/slowpath/icmp']
2223 dc2 = self.statistics['/nat44-ed/in2out/slowpath/drops']
2226 tc2[:, if_idx].sum() - tc1[:, if_idx].sum(), pkt_count)
2228 uc2[:, if_idx].sum() - uc1[:, if_idx].sum(), pkt_count)
2230 ic2[:, if_idx].sum() - ic1[:, if_idx].sum(), pkt_count)
2231 self.assertEqual(dc2[:, if_idx].sum() - dc1[:, if_idx].sum(), 0)
2233 self.logger.info(self.vapi.cli("show trace"))
2236 tc1 = self.statistics['/nat44-ed/out2in/fastpath/tcp']
2237 uc1 = self.statistics['/nat44-ed/out2in/fastpath/udp']
2238 ic1 = self.statistics['/nat44-ed/out2in/fastpath/icmp']
2239 dc1 = self.statistics['/nat44-ed/out2in/fastpath/drops']
2241 recvd_tcp_ports = set()
2242 recvd_udp_ports = set()
2243 recvd_icmp_ids = set()
2247 recvd_tcp_ports.add(p[TCP].sport)
2249 recvd_udp_ports.add(p[UDP].sport)
2251 recvd_icmp_ids.add(p[ICMP].id)
2253 recvd_tcp_ports = list(recvd_tcp_ports)
2254 recvd_udp_ports = list(recvd_udp_ports)
2255 recvd_icmp_ids = list(recvd_icmp_ids)
2257 o2i_pkts = [[] for x in range(0, self.vpp_worker_count)]
2258 for i in range(pkt_count):
2259 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2260 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2261 TCP(dport=choice(recvd_tcp_ports), sport=20))
2262 o2i_pkts[p[TCP].dport % self.vpp_worker_count].append(p)
2264 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2265 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2266 UDP(dport=choice(recvd_udp_ports), sport=20))
2267 o2i_pkts[p[UDP].dport % self.vpp_worker_count].append(p)
2269 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2270 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2271 ICMP(id=choice(recvd_icmp_ids), type='echo-reply'))
2272 o2i_pkts[p[ICMP].id % self.vpp_worker_count].append(p)
2274 for i in range(0, self.vpp_worker_count):
2275 if len(o2i_pkts[i]) > 0:
2276 self.pg1.add_stream(o2i_pkts[i], worker=i)
2278 self.pg_enable_capture(self.pg_interfaces)
2280 capture = self.pg0.get_capture(pkt_count * 3)
2281 for packet in capture:
2283 self.assert_packet_checksums_valid(packet)
2284 self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
2285 if packet.haslayer(TCP):
2286 self.assert_in_range(
2287 packet[TCP].dport, tcp_port_offset,
2288 tcp_port_offset + pkt_count, "dst TCP port")
2289 elif packet.haslayer(UDP):
2290 self.assert_in_range(
2291 packet[UDP].dport, udp_port_offset,
2292 udp_port_offset + pkt_count, "dst UDP port")
2294 self.assert_in_range(
2295 packet[ICMP].id, icmp_id_offset,
2296 icmp_id_offset + pkt_count, "ICMP id")
2298 self.logger.error(ppp("Unexpected or invalid packet "
2299 "(inside network):", packet))
2302 if_idx = self.pg1.sw_if_index
2303 tc2 = self.statistics['/nat44-ed/out2in/fastpath/tcp']
2304 uc2 = self.statistics['/nat44-ed/out2in/fastpath/udp']
2305 ic2 = self.statistics['/nat44-ed/out2in/fastpath/icmp']
2306 dc2 = self.statistics['/nat44-ed/out2in/fastpath/drops']
2309 tc2[:, if_idx].sum() - tc1[:, if_idx].sum(), pkt_count)
2311 uc2[:, if_idx].sum() - uc1[:, if_idx].sum(), pkt_count)
2313 ic2[:, if_idx].sum() - ic1[:, if_idx].sum(), pkt_count)
2314 self.assertEqual(dc2[:, if_idx].sum() - dc1[:, if_idx].sum(), 0)
2316 sc = self.statistics['/nat44-ed/total-sessions']
2317 self.assertEqual(sc[:, 0].sum(), len(recvd_tcp_ports) +
2318 len(recvd_udp_ports) + len(recvd_icmp_ids))
2320 def test_frag_in_order(self):
2321 """ NAT44ED translate fragments arriving in order """
2323 self.nat_add_address(self.nat_addr)
2324 self.nat_add_inside_interface(self.pg0)
2325 self.nat_add_outside_interface(self.pg1)
2327 self.frag_in_order(proto=IP_PROTOS.tcp, ignore_port=True)
2328 self.frag_in_order(proto=IP_PROTOS.udp, ignore_port=True)
2329 self.frag_in_order(proto=IP_PROTOS.icmp, ignore_port=True)
2331 def test_frag_in_order_do_not_translate(self):
2332 """ NAT44ED don't translate fragments arriving in order """
2334 self.nat_add_address(self.nat_addr)
2335 self.nat_add_inside_interface(self.pg0)
2336 self.nat_add_outside_interface(self.pg1)
2337 self.vapi.nat44_forwarding_enable_disable(enable=True)
2339 self.frag_in_order(proto=IP_PROTOS.tcp, dont_translate=True)
2341 def test_frag_out_of_order(self):
2342 """ NAT44ED translate fragments arriving out of order """
2344 self.nat_add_address(self.nat_addr)
2345 self.nat_add_inside_interface(self.pg0)
2346 self.nat_add_outside_interface(self.pg1)
2348 self.frag_out_of_order(proto=IP_PROTOS.tcp, ignore_port=True)
2349 self.frag_out_of_order(proto=IP_PROTOS.udp, ignore_port=True)
2350 self.frag_out_of_order(proto=IP_PROTOS.icmp, ignore_port=True)
2352 def test_frag_in_order_in_plus_out(self):
2353 """ NAT44ED in+out interface fragments in order """
2355 in_port = self.random_port()
2356 out_port = self.random_port()
2358 self.nat_add_address(self.nat_addr)
2359 self.nat_add_inside_interface(self.pg0)
2360 self.nat_add_outside_interface(self.pg0)
2361 self.nat_add_inside_interface(self.pg1)
2362 self.nat_add_outside_interface(self.pg1)
2364 # add static mappings for server
2365 self.nat_add_static_mapping(self.server_addr,
2369 proto=IP_PROTOS.tcp)
2370 self.nat_add_static_mapping(self.server_addr,
2374 proto=IP_PROTOS.udp)
2375 self.nat_add_static_mapping(self.server_addr,
2377 proto=IP_PROTOS.icmp)
2379 # run tests for each protocol
2380 self.frag_in_order_in_plus_out(self.server_addr,
2385 self.frag_in_order_in_plus_out(self.server_addr,
2390 self.frag_in_order_in_plus_out(self.server_addr,
2396 def test_frag_out_of_order_in_plus_out(self):
2397 """ NAT44ED in+out interface fragments out of order """
2399 in_port = self.random_port()
2400 out_port = self.random_port()
2402 self.nat_add_address(self.nat_addr)
2403 self.nat_add_inside_interface(self.pg0)
2404 self.nat_add_outside_interface(self.pg0)
2405 self.nat_add_inside_interface(self.pg1)
2406 self.nat_add_outside_interface(self.pg1)
2408 # add static mappings for server
2409 self.nat_add_static_mapping(self.server_addr,
2413 proto=IP_PROTOS.tcp)
2414 self.nat_add_static_mapping(self.server_addr,
2418 proto=IP_PROTOS.udp)
2419 self.nat_add_static_mapping(self.server_addr,
2421 proto=IP_PROTOS.icmp)
2423 # run tests for each protocol
2424 self.frag_out_of_order_in_plus_out(self.server_addr,
2429 self.frag_out_of_order_in_plus_out(self.server_addr,
2434 self.frag_out_of_order_in_plus_out(self.server_addr,
2440 def test_reass_hairpinning(self):
2441 """ NAT44ED fragments hairpinning """
2443 server_addr = self.pg0.remote_hosts[1].ip4
2445 host_in_port = self.random_port()
2446 server_in_port = self.random_port()
2447 server_out_port = self.random_port()
2449 self.nat_add_address(self.nat_addr)
2450 self.nat_add_inside_interface(self.pg0)
2451 self.nat_add_outside_interface(self.pg1)
2453 # add static mapping for server
2454 self.nat_add_static_mapping(server_addr, self.nat_addr,
2455 server_in_port, server_out_port,
2456 proto=IP_PROTOS.tcp)
2457 self.nat_add_static_mapping(server_addr, self.nat_addr,
2458 server_in_port, server_out_port,
2459 proto=IP_PROTOS.udp)
2460 self.nat_add_static_mapping(server_addr, self.nat_addr)
2462 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2463 host_in_port, proto=IP_PROTOS.tcp,
2465 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2466 host_in_port, proto=IP_PROTOS.udp,
2468 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2469 host_in_port, proto=IP_PROTOS.icmp,
2472 def test_session_limit_per_vrf(self):
2473 """ NAT44ED per vrf session limit """
2476 inside_vrf10 = self.pg2
2481 # 2 interfaces pg0, pg1 (vrf10, limit 1 tcp session)
2482 # non existing vrf_id makes process core dump
2483 self.vapi.nat44_set_session_limit(session_limit=limit, vrf_id=10)
2485 self.nat_add_inside_interface(inside)
2486 self.nat_add_inside_interface(inside_vrf10)
2487 self.nat_add_outside_interface(outside)
2490 self.nat_add_interface_address(outside)
2492 # BUG: causing core dump - when bad vrf_id is specified
2493 # self.nat_add_address(outside.local_ip4, vrf_id=20)
2495 stream = self.create_tcp_stream(inside_vrf10, outside, limit * 2)
2496 inside_vrf10.add_stream(stream)
2498 self.pg_enable_capture(self.pg_interfaces)
2501 capture = outside.get_capture(limit)
2503 stream = self.create_tcp_stream(inside, outside, limit * 2)
2504 inside.add_stream(stream)
2506 self.pg_enable_capture(self.pg_interfaces)
2509 capture = outside.get_capture(len(stream))
2511 def test_show_max_translations(self):
2512 """ NAT44ED API test - max translations per thread """
2513 nat_config = self.vapi.nat_show_config_2()
2514 self.assertEqual(self.max_sessions,
2515 nat_config.max_translations_per_thread)
2517 def test_lru_cleanup(self):
2518 """ NAT44ED LRU cleanup algorithm """
2520 self.nat_add_address(self.nat_addr)
2521 self.nat_add_inside_interface(self.pg0)
2522 self.nat_add_outside_interface(self.pg1)
2524 self.vapi.nat_set_timeouts(
2525 udp=1, tcp_established=7440, tcp_transitory=30, icmp=1)
2527 tcp_port_out = self.init_tcp_session(self.pg0, self.pg1, 2000, 80)
2529 for i in range(0, self.max_sessions - 1):
2530 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2531 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
2532 UDP(sport=7000+i, dport=80))
2535 self.pg0.add_stream(pkts)
2536 self.pg_enable_capture(self.pg_interfaces)
2538 self.pg1.get_capture(len(pkts))
2539 self.sleep(1.5, "wait for timeouts")
2542 for i in range(0, self.max_sessions - 1):
2543 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2544 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
2545 ICMP(id=8000+i, type='echo-request'))
2548 self.pg0.add_stream(pkts)
2549 self.pg_enable_capture(self.pg_interfaces)
2551 self.pg1.get_capture(len(pkts))
2553 def test_session_rst_timeout(self):
2554 """ NAT44ED session RST timeouts """
2556 self.nat_add_address(self.nat_addr)
2557 self.nat_add_inside_interface(self.pg0)
2558 self.nat_add_outside_interface(self.pg1)
2560 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
2561 tcp_transitory=5, icmp=60)
2563 self.init_tcp_session(self.pg0, self.pg1, self.tcp_port_in,
2564 self.tcp_external_port)
2565 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2566 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2567 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2569 self.pg0.add_stream(p)
2570 self.pg_enable_capture(self.pg_interfaces)
2572 self.pg1.get_capture(1)
2576 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2577 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2578 TCP(sport=self.tcp_port_in + 1, dport=self.tcp_external_port + 1,
2580 self.pg0.add_stream(p)
2581 self.pg_enable_capture(self.pg_interfaces)
2583 self.pg1.get_capture(1)
2585 def test_dynamic_out_of_ports(self):
2586 """ NAT44ED dynamic translation test: out of ports """
2588 self.nat_add_inside_interface(self.pg0)
2589 self.nat_add_outside_interface(self.pg1)
2591 # in2out and no NAT addresses added
2592 err_old = self.statistics.get_err_counter(
2593 '/err/nat44-ed-in2out-slowpath/out of ports')
2595 pkts = self.create_stream_in(self.pg0, self.pg1)
2596 self.pg0.add_stream(pkts)
2597 self.pg_enable_capture(self.pg_interfaces)
2599 self.pg1.get_capture(0, timeout=1)
2601 err_new = self.statistics.get_err_counter(
2602 '/err/nat44-ed-in2out-slowpath/out of ports')
2604 self.assertEqual(err_new - err_old, len(pkts))
2606 # in2out after NAT addresses added
2607 self.nat_add_address(self.nat_addr)
2609 err_old = self.statistics.get_err_counter(
2610 '/err/nat44-ed-in2out-slowpath/out of ports')
2612 pkts = self.create_stream_in(self.pg0, self.pg1)
2613 self.pg0.add_stream(pkts)
2614 self.pg_enable_capture(self.pg_interfaces)
2616 capture = self.pg1.get_capture(len(pkts))
2617 self.verify_capture_out(capture, ignore_port=True)
2619 err_new = self.statistics.get_err_counter(
2620 '/err/nat44-ed-in2out-slowpath/out of ports')
2622 self.assertEqual(err_new, err_old)
2624 def test_unknown_proto(self):
2625 """ NAT44ED translate packet with unknown protocol """
2627 self.nat_add_address(self.nat_addr)
2628 self.nat_add_inside_interface(self.pg0)
2629 self.nat_add_outside_interface(self.pg1)
2632 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2633 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2634 TCP(sport=self.tcp_port_in, dport=20))
2635 self.pg0.add_stream(p)
2636 self.pg_enable_capture(self.pg_interfaces)
2638 p = self.pg1.get_capture(1)
2640 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2641 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2643 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2644 TCP(sport=1234, dport=1234))
2645 self.pg0.add_stream(p)
2646 self.pg_enable_capture(self.pg_interfaces)
2648 p = self.pg1.get_capture(1)
2651 self.assertEqual(packet[IP].src, self.nat_addr)
2652 self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
2653 self.assertEqual(packet.haslayer(GRE), 1)
2654 self.assert_packet_checksums_valid(packet)
2656 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2660 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2661 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2663 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2664 TCP(sport=1234, dport=1234))
2665 self.pg1.add_stream(p)
2666 self.pg_enable_capture(self.pg_interfaces)
2668 p = self.pg0.get_capture(1)
2671 self.assertEqual(packet[IP].src, self.pg1.remote_ip4)
2672 self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
2673 self.assertEqual(packet.haslayer(GRE), 1)
2674 self.assert_packet_checksums_valid(packet)
2676 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2679 def test_hairpinning_unknown_proto(self):
2680 """ NAT44ED translate packet with unknown protocol - hairpinning """
2681 host = self.pg0.remote_hosts[0]
2682 server = self.pg0.remote_hosts[1]
2684 server_out_port = 8765
2685 server_nat_ip = "10.0.0.11"
2687 self.nat_add_address(self.nat_addr)
2688 self.nat_add_inside_interface(self.pg0)
2689 self.nat_add_outside_interface(self.pg1)
2691 # add static mapping for server
2692 self.nat_add_static_mapping(server.ip4, server_nat_ip)
2695 p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
2696 IP(src=host.ip4, dst=server_nat_ip) /
2697 TCP(sport=host_in_port, dport=server_out_port))
2698 self.pg0.add_stream(p)
2699 self.pg_enable_capture(self.pg_interfaces)
2701 self.pg0.get_capture(1)
2703 p = (Ether(dst=self.pg0.local_mac, src=host.mac) /
2704 IP(src=host.ip4, dst=server_nat_ip) /
2706 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2707 TCP(sport=1234, dport=1234))
2708 self.pg0.add_stream(p)
2709 self.pg_enable_capture(self.pg_interfaces)
2711 p = self.pg0.get_capture(1)
2714 self.assertEqual(packet[IP].src, self.nat_addr)
2715 self.assertEqual(packet[IP].dst, server.ip4)
2716 self.assertEqual(packet.haslayer(GRE), 1)
2717 self.assert_packet_checksums_valid(packet)
2719 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2723 p = (Ether(dst=self.pg0.local_mac, src=server.mac) /
2724 IP(src=server.ip4, dst=self.nat_addr) /
2726 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2727 TCP(sport=1234, dport=1234))
2728 self.pg0.add_stream(p)
2729 self.pg_enable_capture(self.pg_interfaces)
2731 p = self.pg0.get_capture(1)
2734 self.assertEqual(packet[IP].src, server_nat_ip)
2735 self.assertEqual(packet[IP].dst, host.ip4)
2736 self.assertEqual(packet.haslayer(GRE), 1)
2737 self.assert_packet_checksums_valid(packet)
2739 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2742 def test_output_feature_and_service(self):
2743 """ NAT44ED interface output feature and services """
2744 external_addr = '1.2.3.4'
2748 self.vapi.nat44_forwarding_enable_disable(enable=1)
2749 self.nat_add_address(self.nat_addr)
2750 flags = self.config_flags.NAT_IS_ADDR_ONLY
2751 self.vapi.nat44_add_del_identity_mapping(
2752 ip_address=self.pg1.remote_ip4, sw_if_index=0xFFFFFFFF,
2753 flags=flags, is_add=1)
2754 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
2755 self.nat_add_static_mapping(self.pg0.remote_ip4, external_addr,
2756 local_port, external_port,
2757 proto=IP_PROTOS.tcp, flags=flags)
2759 self.nat_add_inside_interface(self.pg0)
2760 self.nat_add_outside_interface(self.pg0)
2761 self.vapi.nat44_interface_add_del_output_feature(
2762 sw_if_index=self.pg1.sw_if_index, is_add=1)
2764 # from client to service
2765 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2766 IP(src=self.pg1.remote_ip4, dst=external_addr) /
2767 TCP(sport=12345, dport=external_port))
2768 self.pg1.add_stream(p)
2769 self.pg_enable_capture(self.pg_interfaces)
2771 capture = self.pg0.get_capture(1)
2776 self.assertEqual(ip.dst, self.pg0.remote_ip4)
2777 self.assertEqual(tcp.dport, local_port)
2778 self.assert_packet_checksums_valid(p)
2780 self.logger.error(ppp("Unexpected or invalid packet:", p))
2783 # from service back to client
2784 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2785 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2786 TCP(sport=local_port, dport=12345))
2787 self.pg0.add_stream(p)
2788 self.pg_enable_capture(self.pg_interfaces)
2790 capture = self.pg1.get_capture(1)
2795 self.assertEqual(ip.src, external_addr)
2796 self.assertEqual(tcp.sport, external_port)
2797 self.assert_packet_checksums_valid(p)
2799 self.logger.error(ppp("Unexpected or invalid packet:", p))
2802 # from local network host to external network
2803 pkts = self.create_stream_in(self.pg0, self.pg1)
2804 self.pg0.add_stream(pkts)
2805 self.pg_enable_capture(self.pg_interfaces)
2807 capture = self.pg1.get_capture(len(pkts))
2808 self.verify_capture_out(capture, ignore_port=True)
2809 pkts = self.create_stream_in(self.pg0, self.pg1)
2810 self.pg0.add_stream(pkts)
2811 self.pg_enable_capture(self.pg_interfaces)
2813 capture = self.pg1.get_capture(len(pkts))
2814 self.verify_capture_out(capture, ignore_port=True)
2816 # from external network back to local network host
2817 pkts = self.create_stream_out(self.pg1)
2818 self.pg1.add_stream(pkts)
2819 self.pg_enable_capture(self.pg_interfaces)
2821 capture = self.pg0.get_capture(len(pkts))
2822 self.verify_capture_in(capture, self.pg0)
2824 def test_output_feature_and_service3(self):
2825 """ NAT44ED interface output feature and DST NAT """
2826 external_addr = '1.2.3.4'
2830 self.vapi.nat44_forwarding_enable_disable(enable=1)
2831 self.nat_add_address(self.nat_addr)
2832 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
2833 self.nat_add_static_mapping(self.pg1.remote_ip4, external_addr,
2834 local_port, external_port,
2835 proto=IP_PROTOS.tcp, flags=flags)
2837 self.nat_add_inside_interface(self.pg0)
2838 self.nat_add_outside_interface(self.pg0)
2839 self.vapi.nat44_interface_add_del_output_feature(
2840 sw_if_index=self.pg1.sw_if_index, is_add=1)
2842 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2843 IP(src=self.pg0.remote_ip4, dst=external_addr) /
2844 TCP(sport=12345, dport=external_port))
2845 self.pg0.add_stream(p)
2846 self.pg_enable_capture(self.pg_interfaces)
2848 capture = self.pg1.get_capture(1)
2853 self.assertEqual(ip.src, self.pg0.remote_ip4)
2854 self.assertEqual(tcp.sport, 12345)
2855 self.assertEqual(ip.dst, self.pg1.remote_ip4)
2856 self.assertEqual(tcp.dport, local_port)
2857 self.assert_packet_checksums_valid(p)
2859 self.logger.error(ppp("Unexpected or invalid packet:", p))
2862 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2863 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
2864 TCP(sport=local_port, dport=12345))
2865 self.pg1.add_stream(p)
2866 self.pg_enable_capture(self.pg_interfaces)
2868 capture = self.pg0.get_capture(1)
2873 self.assertEqual(ip.src, external_addr)
2874 self.assertEqual(tcp.sport, external_port)
2875 self.assertEqual(ip.dst, self.pg0.remote_ip4)
2876 self.assertEqual(tcp.dport, 12345)
2877 self.assert_packet_checksums_valid(p)
2879 self.logger.error(ppp("Unexpected or invalid packet:", p))
2882 def test_self_twice_nat_lb_negative(self):
2883 """ NAT44ED Self Twice NAT local service load balancing (negative test)
2885 self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True,
2888 def test_self_twice_nat_negative(self):
2889 """ NAT44ED Self Twice NAT (negative test) """
2890 self.twice_nat_common(self_twice_nat=True)
2892 def test_static_lb_multi_clients(self):
2893 """ NAT44ED local service load balancing - multiple clients"""
2895 external_addr = self.nat_addr
2898 server1 = self.pg0.remote_hosts[0]
2899 server2 = self.pg0.remote_hosts[1]
2900 server3 = self.pg0.remote_hosts[2]
2902 locals = [{'addr': server1.ip4,
2906 {'addr': server2.ip4,
2911 flags = self.config_flags.NAT_IS_INSIDE
2912 self.vapi.nat44_interface_add_del_feature(
2913 sw_if_index=self.pg0.sw_if_index,
2914 flags=flags, is_add=1)
2915 self.vapi.nat44_interface_add_del_feature(
2916 sw_if_index=self.pg1.sw_if_index,
2919 self.nat_add_address(self.nat_addr)
2920 self.vapi.nat44_add_del_lb_static_mapping(is_add=1,
2921 external_addr=external_addr,
2922 external_port=external_port,
2923 protocol=IP_PROTOS.tcp,
2924 local_num=len(locals),
2929 clients = ip4_range(self.pg1.remote_ip4, 10, 50)
2931 for client in clients:
2932 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2933 IP(src=client, dst=self.nat_addr) /
2934 TCP(sport=12345, dport=external_port))
2936 self.pg1.add_stream(pkts)
2937 self.pg_enable_capture(self.pg_interfaces)
2939 capture = self.pg0.get_capture(len(pkts))
2941 if p[IP].dst == server1.ip4:
2945 self.assertGreaterEqual(server1_n, server2_n)
2948 'addr': server3.ip4,
2955 self.vapi.nat44_lb_static_mapping_add_del_local(
2957 external_addr=external_addr,
2958 external_port=external_port,
2960 protocol=IP_PROTOS.tcp)
2964 clients = ip4_range(self.pg1.remote_ip4, 60, 110)
2966 for client in clients:
2967 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2968 IP(src=client, dst=self.nat_addr) /
2969 TCP(sport=12346, dport=external_port))
2971 self.assertGreater(len(pkts), 0)
2972 self.pg1.add_stream(pkts)
2973 self.pg_enable_capture(self.pg_interfaces)
2975 capture = self.pg0.get_capture(len(pkts))
2977 if p[IP].dst == server1.ip4:
2979 elif p[IP].dst == server2.ip4:
2983 self.assertGreater(server1_n, 0)
2984 self.assertGreater(server2_n, 0)
2985 self.assertGreater(server3_n, 0)
2988 'addr': server2.ip4,
2994 # remove one back-end
2995 self.vapi.nat44_lb_static_mapping_add_del_local(
2997 external_addr=external_addr,
2998 external_port=external_port,
3000 protocol=IP_PROTOS.tcp)
3004 self.pg1.add_stream(pkts)
3005 self.pg_enable_capture(self.pg_interfaces)
3007 capture = self.pg0.get_capture(len(pkts))
3009 if p[IP].dst == server1.ip4:
3011 elif p[IP].dst == server2.ip4:
3015 self.assertGreater(server1_n, 0)
3016 self.assertEqual(server2_n, 0)
3017 self.assertGreater(server3_n, 0)
3019 def test_syslog_sess(self):
3020 """ NAT44ED Test syslog session creation and deletion """
3021 self.vapi.syslog_set_filter(
3022 self.syslog_severity.SYSLOG_API_SEVERITY_INFO)
3023 self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4)
3025 self.nat_add_address(self.nat_addr)
3026 self.nat_add_inside_interface(self.pg0)
3027 self.nat_add_outside_interface(self.pg1)
3029 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
3030 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3031 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port))
3032 self.pg0.add_stream(p)
3033 self.pg_enable_capture(self.pg_interfaces)
3035 capture = self.pg1.get_capture(1)
3036 self.tcp_port_out = capture[0][TCP].sport
3037 capture = self.pg3.get_capture(1)
3038 self.verify_syslog_sess(capture[0][Raw].load)
3040 self.pg_enable_capture(self.pg_interfaces)
3042 self.nat_add_address(self.nat_addr, is_add=0)
3043 capture = self.pg3.get_capture(1)
3044 self.verify_syslog_sess(capture[0][Raw].load, False)
3046 def test_twice_nat_interface_addr(self):
3047 """ NAT44ED Acquire twice NAT addresses from interface """
3048 flags = self.config_flags.NAT_IS_TWICE_NAT
3049 self.vapi.nat44_add_del_interface_addr(
3050 sw_if_index=self.pg11.sw_if_index,
3051 flags=flags, is_add=1)
3053 # no address in NAT pool
3054 adresses = self.vapi.nat44_address_dump()
3055 self.assertEqual(0, len(adresses))
3057 # configure interface address and check NAT address pool
3058 self.pg11.config_ip4()
3059 adresses = self.vapi.nat44_address_dump()
3060 self.assertEqual(1, len(adresses))
3061 self.assertEqual(str(adresses[0].ip_address),
3062 self.pg11.local_ip4)
3063 self.assertEqual(adresses[0].flags, flags)
3065 # remove interface address and check NAT address pool
3066 self.pg11.unconfig_ip4()
3067 adresses = self.vapi.nat44_address_dump()
3068 self.assertEqual(0, len(adresses))
3070 def test_output_feature_stateful_acl(self):
3071 """ NAT44ED output feature works with stateful ACL """
3073 self.nat_add_address(self.nat_addr)
3074 self.vapi.nat44_interface_add_del_output_feature(
3075 sw_if_index=self.pg1.sw_if_index, is_add=1)
3077 # First ensure that the NAT is working sans ACL
3079 # send packets out2in, no sessions yet so packets should drop
3080 pkts_out2in = self.create_stream_out(self.pg1)
3081 self.send_and_assert_no_replies(self.pg1, pkts_out2in)
3083 # send packets into inside intf, ensure received via outside intf
3084 pkts_in2out = self.create_stream_in(self.pg0, self.pg1)
3085 capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1,
3087 self.verify_capture_out(capture, ignore_port=True)
3089 # send out2in again, with sessions created it should work now
3090 pkts_out2in = self.create_stream_out(self.pg1)
3091 capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0,
3093 self.verify_capture_in(capture, self.pg0)
3095 # Create an ACL blocking everything
3096 out2in_deny_rule = AclRule(is_permit=0)
3097 out2in_acl = VppAcl(self, rules=[out2in_deny_rule])
3098 out2in_acl.add_vpp_config()
3100 # create an ACL to permit/reflect everything
3101 in2out_reflect_rule = AclRule(is_permit=2)
3102 in2out_acl = VppAcl(self, rules=[in2out_reflect_rule])
3103 in2out_acl.add_vpp_config()
3105 # apply as input acl on interface and confirm it blocks everything
3106 acl_if = VppAclInterface(self, sw_if_index=self.pg1.sw_if_index,
3107 n_input=1, acls=[out2in_acl])
3108 acl_if.add_vpp_config()
3109 self.send_and_assert_no_replies(self.pg1, pkts_out2in)
3112 acl_if.acls = [out2in_acl, in2out_acl]
3113 acl_if.add_vpp_config()
3114 # send in2out to generate ACL state (NAT state was created earlier)
3115 capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1,
3117 self.verify_capture_out(capture, ignore_port=True)
3119 # send out2in again. ACL state exists so it should work now.
3120 # TCP packets with the syn flag set also need the ack flag
3121 for p in pkts_out2in:
3122 if p.haslayer(TCP) and p[TCP].flags & 0x02:
3123 p[TCP].flags |= 0x10
3124 capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0,
3126 self.verify_capture_in(capture, self.pg0)
3127 self.logger.info(self.vapi.cli("show trace"))
3129 def test_tcp_close(self):
3130 """ NAT44ED Close TCP session from inside network - output feature """
3131 old_timeouts = self.vapi.nat_get_timeouts()
3133 self.vapi.nat_set_timeouts(
3134 udp=old_timeouts.udp,
3135 tcp_established=old_timeouts.tcp_established,
3136 icmp=old_timeouts.icmp,
3137 tcp_transitory=new_transitory)
3139 self.vapi.nat44_forwarding_enable_disable(enable=1)
3140 self.nat_add_address(self.pg1.local_ip4)
3141 twice_nat_addr = '10.0.1.3'
3142 service_ip = '192.168.16.150'
3143 self.nat_add_address(twice_nat_addr, twice_nat=1)
3145 flags = self.config_flags.NAT_IS_INSIDE
3146 self.vapi.nat44_interface_add_del_feature(
3147 sw_if_index=self.pg0.sw_if_index,
3149 self.vapi.nat44_interface_add_del_feature(
3150 sw_if_index=self.pg0.sw_if_index,
3151 flags=flags, is_add=1)
3152 self.vapi.nat44_interface_add_del_output_feature(
3154 sw_if_index=self.pg1.sw_if_index)
3156 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3157 self.config_flags.NAT_IS_TWICE_NAT)
3158 self.nat_add_static_mapping(self.pg0.remote_ip4,
3160 proto=IP_PROTOS.tcp,
3162 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3163 start_sessnum = len(sessions)
3165 # SYN packet out->in
3166 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3167 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3168 TCP(sport=33898, dport=80, flags="S"))
3169 self.pg1.add_stream(p)
3170 self.pg_enable_capture(self.pg_interfaces)
3172 capture = self.pg0.get_capture(1)
3174 tcp_port = p[TCP].sport
3176 # SYN + ACK packet in->out
3177 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3178 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3179 TCP(sport=80, dport=tcp_port, flags="SA"))
3180 self.pg0.add_stream(p)
3181 self.pg_enable_capture(self.pg_interfaces)
3183 self.pg1.get_capture(1)
3185 # ACK packet out->in
3186 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3187 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3188 TCP(sport=33898, dport=80, flags="A"))
3189 self.pg1.add_stream(p)
3190 self.pg_enable_capture(self.pg_interfaces)
3192 self.pg0.get_capture(1)
3194 # FIN packet in -> out
3195 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3196 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3197 TCP(sport=80, dport=tcp_port, flags="FA", seq=100, ack=300))
3198 self.pg0.add_stream(p)
3199 self.pg_enable_capture(self.pg_interfaces)
3201 self.pg1.get_capture(1)
3203 # FIN+ACK packet out -> in
3204 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3205 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3206 TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
3207 self.pg1.add_stream(p)
3208 self.pg_enable_capture(self.pg_interfaces)
3210 self.pg0.get_capture(1)
3212 # ACK packet in -> out
3213 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3214 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3215 TCP(sport=80, dport=tcp_port, flags="A", seq=101, ack=301))
3216 self.pg0.add_stream(p)
3217 self.pg_enable_capture(self.pg_interfaces)
3219 self.pg1.get_capture(1)
3221 # session now in transitory timeout
3222 # try SYN packet out->in - should be dropped
3223 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3224 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3225 TCP(sport=33898, dport=80, flags="S"))
3226 self.pg1.add_stream(p)
3227 self.pg_enable_capture(self.pg_interfaces)
3230 self.sleep(new_transitory, "wait for transitory timeout")
3231 self.pg0.assert_nothing_captured(0)
3233 # session should still exist
3234 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3235 self.assertEqual(len(sessions) - start_sessnum, 1)
3237 # send FIN+ACK packet out -> in - will cause session to be wiped
3238 # but won't create a new session
3239 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3240 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3241 TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
3242 self.pg1.add_stream(p)
3243 self.pg_enable_capture(self.pg_interfaces)
3246 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3247 self.assertEqual(len(sessions) - start_sessnum, 0)
3248 self.pg0.assert_nothing_captured(0)
3250 def test_tcp_session_close_in(self):
3251 """ NAT44ED Close TCP session from inside network """
3253 in_port = self.tcp_port_in
3255 ext_port = self.tcp_external_port
3257 self.nat_add_address(self.nat_addr)
3258 self.nat_add_inside_interface(self.pg0)
3259 self.nat_add_outside_interface(self.pg1)
3260 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3261 in_port, out_port, proto=IP_PROTOS.tcp,
3262 flags=self.config_flags.NAT_IS_TWICE_NAT)
3264 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3265 session_n = len(sessions)
3267 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3268 tcp_transitory=2, icmp=5)
3270 self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3272 # FIN packet in -> out
3273 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3274 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3275 TCP(sport=in_port, dport=ext_port,
3276 flags="FA", seq=100, ack=300))
3277 self.pg0.add_stream(p)
3278 self.pg_enable_capture(self.pg_interfaces)
3280 self.pg1.get_capture(1)
3284 # ACK packet out -> in
3285 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3286 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3287 TCP(sport=ext_port, dport=out_port,
3288 flags="A", seq=300, ack=101))
3291 # FIN packet out -> in
3292 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3293 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3294 TCP(sport=ext_port, dport=out_port,
3295 flags="FA", seq=300, ack=101))
3298 self.pg1.add_stream(pkts)
3299 self.pg_enable_capture(self.pg_interfaces)
3301 self.pg0.get_capture(2)
3303 # ACK packet in -> out
3304 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3305 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3306 TCP(sport=in_port, dport=ext_port,
3307 flags="A", seq=101, ack=301))
3308 self.pg0.add_stream(p)
3309 self.pg_enable_capture(self.pg_interfaces)
3311 self.pg1.get_capture(1)
3313 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3314 self.assertEqual(len(sessions) - session_n, 1)
3316 out2in_drops = self.get_err_counter(
3317 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3318 in2out_drops = self.get_err_counter(
3319 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3321 # extra FIN packet out -> in - this should be dropped
3322 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3323 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3324 TCP(sport=ext_port, dport=out_port,
3325 flags="FA", seq=300, ack=101))
3327 self.pg1.add_stream(p)
3328 self.pg_enable_capture(self.pg_interfaces)
3330 self.pg0.assert_nothing_captured()
3332 # extra ACK packet in -> out - this should be dropped
3333 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3334 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3335 TCP(sport=in_port, dport=ext_port,
3336 flags="A", seq=101, ack=301))
3337 self.pg0.add_stream(p)
3338 self.pg_enable_capture(self.pg_interfaces)
3340 self.pg1.assert_nothing_captured()
3342 stats = self.get_err_counter(
3343 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3344 self.assertEqual(stats - out2in_drops, 1)
3345 stats = self.get_err_counter(
3346 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3347 self.assertEqual(stats - in2out_drops, 1)
3350 # extra ACK packet in -> out - this will cause session to be wiped
3351 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3352 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3353 TCP(sport=in_port, dport=ext_port,
3354 flags="A", seq=101, ack=301))
3355 self.pg0.add_stream(p)
3356 self.pg_enable_capture(self.pg_interfaces)
3358 self.pg1.assert_nothing_captured()
3359 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3360 self.assertEqual(len(sessions) - session_n, 0)
3362 def test_tcp_session_close_out(self):
3363 """ NAT44ED Close TCP session from outside network """
3365 in_port = self.tcp_port_in
3367 ext_port = self.tcp_external_port
3369 self.nat_add_address(self.nat_addr)
3370 self.nat_add_inside_interface(self.pg0)
3371 self.nat_add_outside_interface(self.pg1)
3372 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3373 in_port, out_port, proto=IP_PROTOS.tcp,
3374 flags=self.config_flags.NAT_IS_TWICE_NAT)
3376 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3377 session_n = len(sessions)
3379 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3380 tcp_transitory=2, icmp=5)
3382 _ = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3384 # FIN packet out -> in
3385 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3386 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3387 TCP(sport=ext_port, dport=out_port,
3388 flags="FA", seq=100, ack=300))
3389 self.pg1.add_stream(p)
3390 self.pg_enable_capture(self.pg_interfaces)
3392 self.pg0.get_capture(1)
3394 # FIN+ACK packet in -> out
3395 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3396 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3397 TCP(sport=in_port, dport=ext_port,
3398 flags="FA", seq=300, ack=101))
3400 self.pg0.add_stream(p)
3401 self.pg_enable_capture(self.pg_interfaces)
3403 self.pg1.get_capture(1)
3405 # ACK packet out -> in
3406 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3407 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3408 TCP(sport=ext_port, dport=out_port,
3409 flags="A", seq=101, ack=301))
3410 self.pg1.add_stream(p)
3411 self.pg_enable_capture(self.pg_interfaces)
3413 self.pg0.get_capture(1)
3415 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3416 self.assertEqual(len(sessions) - session_n, 1)
3418 out2in_drops = self.get_err_counter(
3419 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3420 in2out_drops = self.get_err_counter(
3421 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3423 # extra FIN packet out -> in - this should be dropped
3424 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3425 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3426 TCP(sport=ext_port, dport=out_port,
3427 flags="FA", seq=300, ack=101))
3429 self.pg1.add_stream(p)
3430 self.pg_enable_capture(self.pg_interfaces)
3432 self.pg0.assert_nothing_captured()
3434 # extra ACK packet in -> out - this should be dropped
3435 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3436 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3437 TCP(sport=in_port, dport=ext_port,
3438 flags="A", seq=101, ack=301))
3439 self.pg0.add_stream(p)
3440 self.pg_enable_capture(self.pg_interfaces)
3442 self.pg1.assert_nothing_captured()
3444 stats = self.get_err_counter(
3445 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3446 self.assertEqual(stats - out2in_drops, 1)
3447 stats = self.get_err_counter(
3448 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3449 self.assertEqual(stats - in2out_drops, 1)
3452 # extra ACK packet in -> out - this will cause session to be wiped
3453 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3454 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3455 TCP(sport=in_port, dport=ext_port,
3456 flags="A", seq=101, ack=301))
3457 self.pg0.add_stream(p)
3458 self.pg_enable_capture(self.pg_interfaces)
3460 self.pg1.assert_nothing_captured()
3461 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3462 self.assertEqual(len(sessions) - session_n, 0)
3464 def test_tcp_session_close_simultaneous(self):
3465 """ NAT44ED Close TCP session from inside network """
3467 in_port = self.tcp_port_in
3470 self.nat_add_address(self.nat_addr)
3471 self.nat_add_inside_interface(self.pg0)
3472 self.nat_add_outside_interface(self.pg1)
3473 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3474 in_port, ext_port, proto=IP_PROTOS.tcp,
3475 flags=self.config_flags.NAT_IS_TWICE_NAT)
3477 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3478 session_n = len(sessions)
3480 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3481 tcp_transitory=2, icmp=5)
3483 out_port = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3485 # FIN packet in -> out
3486 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3487 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3488 TCP(sport=in_port, dport=ext_port,
3489 flags="FA", seq=100, ack=300))
3490 self.pg0.add_stream(p)
3491 self.pg_enable_capture(self.pg_interfaces)
3493 self.pg1.get_capture(1)
3495 # FIN packet out -> in
3496 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3497 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3498 TCP(sport=ext_port, dport=out_port,
3499 flags="FA", seq=300, ack=100))
3500 self.pg1.add_stream(p)
3501 self.pg_enable_capture(self.pg_interfaces)
3503 self.pg0.get_capture(1)
3505 # ACK packet in -> out
3506 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3507 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3508 TCP(sport=in_port, dport=ext_port,
3509 flags="A", seq=101, ack=301))
3510 self.pg0.add_stream(p)
3511 self.pg_enable_capture(self.pg_interfaces)
3513 self.pg1.get_capture(1)
3515 # ACK packet out -> in
3516 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3517 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3518 TCP(sport=ext_port, dport=out_port,
3519 flags="A", seq=301, ack=101))
3520 self.pg1.add_stream(p)
3521 self.pg_enable_capture(self.pg_interfaces)
3523 self.pg0.get_capture(1)
3525 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3526 self.assertEqual(len(sessions) - session_n, 1)
3528 out2in_drops = self.get_err_counter(
3529 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3530 in2out_drops = self.get_err_counter(
3531 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3533 # extra FIN packet out -> in - this should be dropped
3534 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3535 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3536 TCP(sport=ext_port, dport=out_port,
3537 flags="FA", seq=300, ack=101))
3539 self.pg1.add_stream(p)
3540 self.pg_enable_capture(self.pg_interfaces)
3542 self.pg0.assert_nothing_captured()
3544 # extra ACK packet in -> out - this should be dropped
3545 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3546 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3547 TCP(sport=in_port, dport=ext_port,
3548 flags="A", seq=101, ack=301))
3549 self.pg0.add_stream(p)
3550 self.pg_enable_capture(self.pg_interfaces)
3552 self.pg1.assert_nothing_captured()
3554 stats = self.get_err_counter(
3555 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3556 self.assertEqual(stats - out2in_drops, 1)
3557 stats = self.get_err_counter(
3558 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3559 self.assertEqual(stats - in2out_drops, 1)
3562 # extra ACK packet in -> out - this will cause session to be wiped
3563 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3564 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3565 TCP(sport=in_port, dport=ext_port,
3566 flags="A", seq=101, ack=301))
3567 self.pg0.add_stream(p)
3568 self.pg_enable_capture(self.pg_interfaces)
3570 self.pg1.assert_nothing_captured()
3571 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3572 self.assertEqual(len(sessions) - session_n, 0)
3574 def test_dynamic_vrf(self):
3575 """ NAT44ED dynamic translation test: different VRF"""
3580 self.nat_add_address(self.nat_addr, vrf_id=vrf_id_in)
3583 self.configure_ip4_interface(self.pg7, table_id=vrf_id_in)
3584 self.configure_ip4_interface(self.pg8, table_id=vrf_id_out)
3586 self.nat_add_inside_interface(self.pg7)
3587 self.nat_add_outside_interface(self.pg8)
3589 # just basic stuff nothing special
3590 pkts = self.create_stream_in(self.pg7, self.pg8)
3591 self.pg7.add_stream(pkts)
3592 self.pg_enable_capture(self.pg_interfaces)
3594 capture = self.pg8.get_capture(len(pkts))
3595 self.verify_capture_out(capture, ignore_port=True)
3597 pkts = self.create_stream_out(self.pg8)
3598 self.pg8.add_stream(pkts)
3599 self.pg_enable_capture(self.pg_interfaces)
3601 capture = self.pg7.get_capture(len(pkts))
3602 self.verify_capture_in(capture, self.pg7)
3608 self.vapi.ip_table_add_del(is_add=0,
3609 table={'table_id': vrf_id_in})
3610 self.vapi.ip_table_add_del(is_add=0,
3611 table={'table_id': vrf_id_out})
3613 def test_dynamic_output_feature_vrf(self):
3614 """ NAT44ED dynamic translation test: output-feature, VRF"""
3616 # other then default (0)
3619 self.nat_add_address(self.nat_addr)
3620 self.vapi.nat44_interface_add_del_output_feature(
3621 sw_if_index=self.pg8.sw_if_index, is_add=1)
3624 self.configure_ip4_interface(self.pg7, table_id=new_vrf_id)
3625 self.configure_ip4_interface(self.pg8, table_id=new_vrf_id)
3628 tcpn = self.statistics['/nat44-ed/in2out/slowpath/tcp']
3629 udpn = self.statistics['/nat44-ed/in2out/slowpath/udp']
3630 icmpn = self.statistics['/nat44-ed/in2out/slowpath/icmp']
3631 drops = self.statistics['/nat44-ed/in2out/slowpath/drops']
3633 pkts = self.create_stream_in(self.pg7, self.pg8)
3634 self.pg7.add_stream(pkts)
3635 self.pg_enable_capture(self.pg_interfaces)
3637 capture = self.pg8.get_capture(len(pkts))
3638 self.verify_capture_out(capture, ignore_port=True)
3640 if_idx = self.pg7.sw_if_index
3641 cnt = self.statistics['/nat44-ed/in2out/slowpath/tcp']
3642 self.assertEqual(cnt[:, if_idx].sum() - tcpn[:, if_idx].sum(), 2)
3643 cnt = self.statistics['/nat44-ed/in2out/slowpath/udp']
3644 self.assertEqual(cnt[:, if_idx].sum() - udpn[:, if_idx].sum(), 1)
3645 cnt = self.statistics['/nat44-ed/in2out/slowpath/icmp']
3646 self.assertEqual(cnt[:, if_idx].sum() - icmpn[:, if_idx].sum(), 1)
3647 cnt = self.statistics['/nat44-ed/in2out/slowpath/drops']
3648 self.assertEqual(cnt[:, if_idx].sum() - drops[:, if_idx].sum(), 0)
3651 tcpn = self.statistics['/nat44-ed/out2in/fastpath/tcp']
3652 udpn = self.statistics['/nat44-ed/out2in/fastpath/udp']
3653 icmpn = self.statistics['/nat44-ed/out2in/fastpath/icmp']
3654 drops = self.statistics['/nat44-ed/out2in/fastpath/drops']
3656 pkts = self.create_stream_out(self.pg8)
3657 self.pg8.add_stream(pkts)
3658 self.pg_enable_capture(self.pg_interfaces)
3660 capture = self.pg7.get_capture(len(pkts))
3661 self.verify_capture_in(capture, self.pg7)
3663 if_idx = self.pg8.sw_if_index
3664 cnt = self.statistics['/nat44-ed/out2in/fastpath/tcp']
3665 self.assertEqual(cnt[:, if_idx].sum() - tcpn[:, if_idx].sum(), 2)
3666 cnt = self.statistics['/nat44-ed/out2in/fastpath/udp']
3667 self.assertEqual(cnt[:, if_idx].sum() - udpn[:, if_idx].sum(), 1)
3668 cnt = self.statistics['/nat44-ed/out2in/fastpath/icmp']
3669 self.assertEqual(cnt[:, if_idx].sum() - icmpn[:, if_idx].sum(), 1)
3670 cnt = self.statistics['/nat44-ed/out2in/fastpath/drops']
3671 self.assertEqual(cnt[:, if_idx].sum() - drops[:, if_idx].sum(), 0)
3673 sessions = self.statistics['/nat44-ed/total-sessions']
3674 self.assertEqual(sessions[:, 0].sum(), 3)
3680 self.vapi.ip_table_add_del(is_add=0,
3681 table={'table_id': new_vrf_id})
3683 def test_next_src_nat(self):
3684 """ NAT44ED On way back forward packet to nat44-in2out node. """
3686 twice_nat_addr = '10.0.1.3'
3689 post_twice_nat_port = 0
3691 self.vapi.nat44_forwarding_enable_disable(enable=1)
3692 self.nat_add_address(twice_nat_addr, twice_nat=1)
3693 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3694 self.config_flags.NAT_IS_SELF_TWICE_NAT)
3695 self.nat_add_static_mapping(self.pg6.remote_ip4, self.pg1.remote_ip4,
3696 local_port, external_port,
3697 proto=IP_PROTOS.tcp, vrf_id=1,
3699 self.vapi.nat44_interface_add_del_feature(
3700 sw_if_index=self.pg6.sw_if_index,
3703 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
3704 IP(src=self.pg6.remote_ip4, dst=self.pg1.remote_ip4) /
3705 TCP(sport=12345, dport=external_port))
3706 self.pg6.add_stream(p)
3707 self.pg_enable_capture(self.pg_interfaces)
3709 capture = self.pg6.get_capture(1)
3714 self.assertEqual(ip.src, twice_nat_addr)
3715 self.assertNotEqual(tcp.sport, 12345)
3716 post_twice_nat_port = tcp.sport
3717 self.assertEqual(ip.dst, self.pg6.remote_ip4)
3718 self.assertEqual(tcp.dport, local_port)
3719 self.assert_packet_checksums_valid(p)
3721 self.logger.error(ppp("Unexpected or invalid packet:", p))
3724 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
3725 IP(src=self.pg6.remote_ip4, dst=twice_nat_addr) /
3726 TCP(sport=local_port, dport=post_twice_nat_port))
3727 self.pg6.add_stream(p)
3728 self.pg_enable_capture(self.pg_interfaces)
3730 capture = self.pg6.get_capture(1)
3735 self.assertEqual(ip.src, self.pg1.remote_ip4)
3736 self.assertEqual(tcp.sport, external_port)
3737 self.assertEqual(ip.dst, self.pg6.remote_ip4)
3738 self.assertEqual(tcp.dport, 12345)
3739 self.assert_packet_checksums_valid(p)
3741 self.logger.error(ppp("Unexpected or invalid packet:", p))
3744 def test_one_armed_nat44_static(self):
3745 """ NAT44ED One armed NAT and 1:1 NAPT asymmetrical rule """
3747 remote_host = self.pg4.remote_hosts[0]
3748 local_host = self.pg4.remote_hosts[1]
3753 self.vapi.nat44_forwarding_enable_disable(enable=1)
3754 self.nat_add_address(self.nat_addr, twice_nat=1)
3755 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3756 self.config_flags.NAT_IS_TWICE_NAT)
3757 self.nat_add_static_mapping(local_host.ip4, self.nat_addr,
3758 local_port, external_port,
3759 proto=IP_PROTOS.tcp, flags=flags)
3760 flags = self.config_flags.NAT_IS_INSIDE
3761 self.vapi.nat44_interface_add_del_feature(
3762 sw_if_index=self.pg4.sw_if_index,
3764 self.vapi.nat44_interface_add_del_feature(
3765 sw_if_index=self.pg4.sw_if_index,
3766 flags=flags, is_add=1)
3768 # from client to service
3769 p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
3770 IP(src=remote_host.ip4, dst=self.nat_addr) /
3771 TCP(sport=12345, dport=external_port))
3772 self.pg4.add_stream(p)
3773 self.pg_enable_capture(self.pg_interfaces)
3775 capture = self.pg4.get_capture(1)
3780 self.assertEqual(ip.dst, local_host.ip4)
3781 self.assertEqual(ip.src, self.nat_addr)
3782 self.assertEqual(tcp.dport, local_port)
3783 self.assertNotEqual(tcp.sport, 12345)
3784 eh_port_in = tcp.sport
3785 self.assert_packet_checksums_valid(p)
3787 self.logger.error(ppp("Unexpected or invalid packet:", p))
3790 # from service back to client
3791 p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
3792 IP(src=local_host.ip4, dst=self.nat_addr) /
3793 TCP(sport=local_port, dport=eh_port_in))
3794 self.pg4.add_stream(p)
3795 self.pg_enable_capture(self.pg_interfaces)
3797 capture = self.pg4.get_capture(1)
3802 self.assertEqual(ip.src, self.nat_addr)
3803 self.assertEqual(ip.dst, remote_host.ip4)
3804 self.assertEqual(tcp.sport, external_port)
3805 self.assertEqual(tcp.dport, 12345)
3806 self.assert_packet_checksums_valid(p)
3808 self.logger.error(ppp("Unexpected or invalid packet:", p))
3812 if __name__ == '__main__':
3813 unittest.main(testRunner=VppTestRunner)