5 from random import randint
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_plugin_enable_disable(
50 flags=self.nat44_config_flags.NAT44_IS_ENDPOINT_DEPENDENT,
51 sessions=self.max_sessions, enable=1)
53 def plugin_disable(self):
54 self.vapi.nat44_plugin_enable_disable(enable=0)
57 def config_flags(self):
58 return VppEnum.vl_api_nat_config_flags_t
61 def nat44_config_flags(self):
62 return VppEnum.vl_api_nat44_config_flags_t
65 def syslog_severity(self):
66 return VppEnum.vl_api_syslog_severity_t
69 def server_addr(self):
70 return self.pg1.remote_hosts[0].ip4
74 return randint(1025, 65535)
77 def proto2layer(proto):
78 if proto == IP_PROTOS.tcp:
80 elif proto == IP_PROTOS.udp:
82 elif proto == IP_PROTOS.icmp:
85 raise Exception("Unsupported protocol")
88 def create_and_add_ip4_table(cls, i, table_id=0):
89 cls.vapi.ip_table_add_del(is_add=1, table={'table_id': table_id})
90 i.set_table_ip4(table_id)
93 def configure_ip4_interface(cls, i, hosts=0, table_id=None):
95 cls.create_and_add_ip4_table(i, table_id)
103 i.generate_remote_hosts(hosts)
104 i.configure_ipv4_neighbors()
107 def nat_add_interface_address(cls, i):
108 cls.vapi.nat44_add_del_interface_addr(
109 sw_if_index=i.sw_if_index, is_add=1)
111 def nat_add_inside_interface(self, i):
112 self.vapi.nat44_interface_add_del_feature(
113 flags=self.config_flags.NAT_IS_INSIDE,
114 sw_if_index=i.sw_if_index, is_add=1)
116 def nat_add_outside_interface(self, i):
117 self.vapi.nat44_interface_add_del_feature(
118 flags=self.config_flags.NAT_IS_OUTSIDE,
119 sw_if_index=i.sw_if_index, is_add=1)
121 def nat_add_address(self, address, twice_nat=0,
122 vrf_id=0xFFFFFFFF, is_add=1):
123 flags = self.config_flags.NAT_IS_TWICE_NAT if twice_nat else 0
124 self.vapi.nat44_add_del_address_range(first_ip_address=address,
125 last_ip_address=address,
130 def nat_add_static_mapping(self, local_ip, external_ip='0.0.0.0',
131 local_port=0, external_port=0, vrf_id=0,
132 is_add=1, external_sw_if_index=0xFFFFFFFF,
133 proto=0, tag="", flags=0):
135 if not (local_port and external_port):
136 flags |= self.config_flags.NAT_IS_ADDR_ONLY
138 self.vapi.nat44_add_del_static_mapping(
140 local_ip_address=local_ip,
141 external_ip_address=external_ip,
142 external_sw_if_index=external_sw_if_index,
143 local_port=local_port,
144 external_port=external_port,
145 vrf_id=vrf_id, protocol=proto,
151 super(NAT44EDTestCase, cls).setUpClass()
152 cls.vapi.cli("set log class nat level debug")
154 cls.create_pg_interfaces(range(12))
155 cls.interfaces = list(cls.pg_interfaces[:4])
157 cls.create_and_add_ip4_table(cls.pg2, 10)
159 for i in cls.interfaces:
160 cls.configure_ip4_interface(i, hosts=3)
162 # test specific (test-multiple-vrf)
163 cls.vapi.ip_table_add_del(is_add=1, table={'table_id': 1})
165 # test specific (test-one-armed-nat44-static)
166 cls.pg4.generate_remote_hosts(2)
168 cls.vapi.sw_interface_add_del_address(
169 sw_if_index=cls.pg4.sw_if_index,
170 prefix="10.0.0.1/24")
172 cls.pg4.resolve_arp()
173 cls.pg4._remote_hosts[1]._ip4 = cls.pg4._remote_hosts[0]._ip4
174 cls.pg4.resolve_arp()
176 # test specific interface (pg5)
177 cls.pg5._local_ip4 = "10.1.1.1"
178 cls.pg5._remote_hosts[0]._ip4 = "10.1.1.2"
179 cls.pg5.set_table_ip4(1)
182 cls.pg5.resolve_arp()
184 # test specific interface (pg6)
185 cls.pg6._local_ip4 = "10.1.2.1"
186 cls.pg6._remote_hosts[0]._ip4 = "10.1.2.2"
187 cls.pg6.set_table_ip4(1)
190 cls.pg6.resolve_arp()
194 rl.append(VppIpRoute(cls, "0.0.0.0", 0,
195 [VppRoutePath("0.0.0.0", 0xffffffff,
197 register=False, table_id=1))
198 rl.append(VppIpRoute(cls, "0.0.0.0", 0,
199 [VppRoutePath(cls.pg1.local_ip4,
200 cls.pg1.sw_if_index)],
202 rl.append(VppIpRoute(cls, cls.pg5.remote_ip4, 32,
203 [VppRoutePath("0.0.0.0",
204 cls.pg5.sw_if_index)],
205 register=False, table_id=1))
206 rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 32,
207 [VppRoutePath("0.0.0.0",
208 cls.pg6.sw_if_index)],
209 register=False, table_id=1))
210 rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 16,
211 [VppRoutePath("0.0.0.0", 0xffffffff,
213 register=False, table_id=0))
218 def get_err_counter(self, path):
219 return self.statistics.get_err_counter(path)
221 def get_stats_counter(self, path, worker=0):
222 return self.statistics.get_counter(path)[worker]
224 def reass_hairpinning(self, server_addr, server_in_port, server_out_port,
225 host_in_port, proto=IP_PROTOS.tcp,
227 layer = self.proto2layer(proto)
229 if proto == IP_PROTOS.tcp:
230 data = b"A" * 4 + b"B" * 16 + b"C" * 3
232 data = b"A" * 16 + b"B" * 16 + b"C" * 3
234 # send packet from host to server
235 pkts = self.create_stream_frag(self.pg0,
241 self.pg0.add_stream(pkts)
242 self.pg_enable_capture(self.pg_interfaces)
244 frags = self.pg0.get_capture(len(pkts))
245 p = self.reass_frags_and_verify(frags,
248 if proto != IP_PROTOS.icmp:
250 self.assertNotEqual(p[layer].sport, host_in_port)
251 self.assertEqual(p[layer].dport, server_in_port)
254 self.assertNotEqual(p[layer].id, host_in_port)
255 self.assertEqual(data, p[Raw].load)
257 def frag_out_of_order(self, proto=IP_PROTOS.tcp, dont_translate=False,
259 layer = self.proto2layer(proto)
261 if proto == IP_PROTOS.tcp:
262 data = b"A" * 4 + b"B" * 16 + b"C" * 3
264 data = b"A" * 16 + b"B" * 16 + b"C" * 3
265 self.port_in = self.random_port()
269 pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4,
270 self.port_in, 20, data, proto)
272 self.pg0.add_stream(pkts)
273 self.pg_enable_capture(self.pg_interfaces)
275 frags = self.pg1.get_capture(len(pkts))
276 if not dont_translate:
277 p = self.reass_frags_and_verify(frags,
281 p = self.reass_frags_and_verify(frags,
284 if proto != IP_PROTOS.icmp:
285 if not dont_translate:
286 self.assertEqual(p[layer].dport, 20)
288 self.assertNotEqual(p[layer].sport, self.port_in)
290 self.assertEqual(p[layer].sport, self.port_in)
293 if not dont_translate:
294 self.assertNotEqual(p[layer].id, self.port_in)
296 self.assertEqual(p[layer].id, self.port_in)
297 self.assertEqual(data, p[Raw].load)
300 if not dont_translate:
301 dst_addr = self.nat_addr
303 dst_addr = self.pg0.remote_ip4
304 if proto != IP_PROTOS.icmp:
306 dport = p[layer].sport
310 pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport,
311 data, proto, echo_reply=True)
313 self.pg1.add_stream(pkts)
314 self.pg_enable_capture(self.pg_interfaces)
316 frags = self.pg0.get_capture(len(pkts))
317 p = self.reass_frags_and_verify(frags,
320 if proto != IP_PROTOS.icmp:
321 self.assertEqual(p[layer].sport, 20)
322 self.assertEqual(p[layer].dport, self.port_in)
324 self.assertEqual(p[layer].id, self.port_in)
325 self.assertEqual(data, p[Raw].load)
327 def reass_frags_and_verify(self, frags, src, dst):
330 self.assertEqual(p[IP].src, src)
331 self.assertEqual(p[IP].dst, dst)
332 self.assert_ip_checksum_valid(p)
333 buffer.seek(p[IP].frag * 8)
334 buffer.write(bytes(p[IP].payload))
335 ip = IP(src=frags[0][IP].src, dst=frags[0][IP].dst,
336 proto=frags[0][IP].proto)
337 if ip.proto == IP_PROTOS.tcp:
338 p = (ip / TCP(buffer.getvalue()))
339 self.logger.debug(ppp("Reassembled:", p))
340 self.assert_tcp_checksum_valid(p)
341 elif ip.proto == IP_PROTOS.udp:
342 p = (ip / UDP(buffer.getvalue()[:8]) /
343 Raw(buffer.getvalue()[8:]))
344 elif ip.proto == IP_PROTOS.icmp:
345 p = (ip / ICMP(buffer.getvalue()))
348 def frag_in_order(self, proto=IP_PROTOS.tcp, dont_translate=False,
350 layer = self.proto2layer(proto)
352 if proto == IP_PROTOS.tcp:
353 data = b"A" * 4 + b"B" * 16 + b"C" * 3
355 data = b"A" * 16 + b"B" * 16 + b"C" * 3
356 self.port_in = self.random_port()
359 pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4,
360 self.port_in, 20, data, proto)
361 self.pg0.add_stream(pkts)
362 self.pg_enable_capture(self.pg_interfaces)
364 frags = self.pg1.get_capture(len(pkts))
365 if not dont_translate:
366 p = self.reass_frags_and_verify(frags,
370 p = self.reass_frags_and_verify(frags,
373 if proto != IP_PROTOS.icmp:
374 if not dont_translate:
375 self.assertEqual(p[layer].dport, 20)
377 self.assertNotEqual(p[layer].sport, self.port_in)
379 self.assertEqual(p[layer].sport, self.port_in)
382 if not dont_translate:
383 self.assertNotEqual(p[layer].id, self.port_in)
385 self.assertEqual(p[layer].id, self.port_in)
386 self.assertEqual(data, p[Raw].load)
389 if not dont_translate:
390 dst_addr = self.nat_addr
392 dst_addr = self.pg0.remote_ip4
393 if proto != IP_PROTOS.icmp:
395 dport = p[layer].sport
399 pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport, data,
400 proto, echo_reply=True)
401 self.pg1.add_stream(pkts)
402 self.pg_enable_capture(self.pg_interfaces)
404 frags = self.pg0.get_capture(len(pkts))
405 p = self.reass_frags_and_verify(frags,
408 if proto != IP_PROTOS.icmp:
409 self.assertEqual(p[layer].sport, 20)
410 self.assertEqual(p[layer].dport, self.port_in)
412 self.assertEqual(p[layer].id, self.port_in)
413 self.assertEqual(data, p[Raw].load)
415 def verify_capture_out(self, capture, nat_ip=None, same_port=False,
416 dst_ip=None, ignore_port=False):
418 nat_ip = self.nat_addr
419 for packet in capture:
421 self.assert_packet_checksums_valid(packet)
422 self.assertEqual(packet[IP].src, nat_ip)
423 if dst_ip is not None:
424 self.assertEqual(packet[IP].dst, dst_ip)
425 if packet.haslayer(TCP):
429 packet[TCP].sport, self.tcp_port_in)
432 packet[TCP].sport, self.tcp_port_in)
433 self.tcp_port_out = packet[TCP].sport
434 self.assert_packet_checksums_valid(packet)
435 elif packet.haslayer(UDP):
439 packet[UDP].sport, self.udp_port_in)
442 packet[UDP].sport, self.udp_port_in)
443 self.udp_port_out = packet[UDP].sport
448 packet[ICMP].id, self.icmp_id_in)
451 packet[ICMP].id, self.icmp_id_in)
452 self.icmp_id_out = packet[ICMP].id
453 self.assert_packet_checksums_valid(packet)
455 self.logger.error(ppp("Unexpected or invalid packet "
456 "(outside network):", packet))
459 def verify_capture_in(self, capture, in_if):
460 for packet in capture:
462 self.assert_packet_checksums_valid(packet)
463 self.assertEqual(packet[IP].dst, in_if.remote_ip4)
464 if packet.haslayer(TCP):
465 self.assertEqual(packet[TCP].dport, self.tcp_port_in)
466 elif packet.haslayer(UDP):
467 self.assertEqual(packet[UDP].dport, self.udp_port_in)
469 self.assertEqual(packet[ICMP].id, self.icmp_id_in)
471 self.logger.error(ppp("Unexpected or invalid packet "
472 "(inside network):", packet))
475 def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64):
477 dst_ip = out_if.remote_ip4
481 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
482 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
483 TCP(sport=self.tcp_port_in, dport=20))
487 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
488 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
489 UDP(sport=self.udp_port_in, dport=20))
493 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
494 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
495 ICMP(id=self.icmp_id_in, type='echo-request'))
500 def create_stream_out(self, out_if, dst_ip=None, ttl=64,
501 use_inside_ports=False):
503 dst_ip = self.nat_addr
504 if not use_inside_ports:
505 tcp_port = self.tcp_port_out
506 udp_port = self.udp_port_out
507 icmp_id = self.icmp_id_out
509 tcp_port = self.tcp_port_in
510 udp_port = self.udp_port_in
511 icmp_id = self.icmp_id_in
514 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
515 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
516 TCP(dport=tcp_port, sport=20))
520 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
521 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
522 UDP(dport=udp_port, sport=20))
526 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
527 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
528 ICMP(id=icmp_id, type='echo-reply'))
533 def create_tcp_stream(self, in_if, out_if, count):
537 for i in range(count):
538 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
539 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=64) /
540 TCP(sport=port + i, dport=20))
545 def create_stream_frag(self, src_if, dst, sport, dport, data,
546 proto=IP_PROTOS.tcp, echo_reply=False):
547 if proto == IP_PROTOS.tcp:
548 p = (IP(src=src_if.remote_ip4, dst=dst) /
549 TCP(sport=sport, dport=dport) /
551 p = p.__class__(scapy.compat.raw(p))
552 chksum = p[TCP].chksum
553 proto_header = TCP(sport=sport, dport=dport, chksum=chksum)
554 elif proto == IP_PROTOS.udp:
555 proto_header = UDP(sport=sport, dport=dport)
556 elif proto == IP_PROTOS.icmp:
558 proto_header = ICMP(id=sport, type='echo-request')
560 proto_header = ICMP(id=sport, type='echo-reply')
562 raise Exception("Unsupported protocol")
563 id = self.random_port()
565 if proto == IP_PROTOS.tcp:
568 raw = Raw(data[0:16])
569 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
570 IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=0, id=id) /
574 if proto == IP_PROTOS.tcp:
575 raw = Raw(data[4:20])
577 raw = Raw(data[16:32])
578 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
579 IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=3, id=id,
583 if proto == IP_PROTOS.tcp:
587 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
588 IP(src=src_if.remote_ip4, dst=dst, frag=5, proto=proto,
594 def frag_in_order_in_plus_out(self, in_addr, out_addr, in_port, out_port,
595 proto=IP_PROTOS.tcp):
597 layer = self.proto2layer(proto)
599 if proto == IP_PROTOS.tcp:
600 data = b"A" * 4 + b"B" * 16 + b"C" * 3
602 data = b"A" * 16 + b"B" * 16 + b"C" * 3
603 port_in = self.random_port()
607 pkts = self.create_stream_frag(self.pg0, out_addr,
610 self.pg0.add_stream(pkts)
611 self.pg_enable_capture(self.pg_interfaces)
613 frags = self.pg1.get_capture(len(pkts))
614 p = self.reass_frags_and_verify(frags,
617 if proto != IP_PROTOS.icmp:
618 self.assertEqual(p[layer].sport, port_in)
619 self.assertEqual(p[layer].dport, in_port)
621 self.assertEqual(p[layer].id, port_in)
622 self.assertEqual(data, p[Raw].load)
625 if proto != IP_PROTOS.icmp:
626 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
628 p[layer].sport, data, proto)
630 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
631 p[layer].id, 0, data, proto,
633 self.pg1.add_stream(pkts)
634 self.pg_enable_capture(self.pg_interfaces)
636 frags = self.pg0.get_capture(len(pkts))
637 p = self.reass_frags_and_verify(frags,
640 if proto != IP_PROTOS.icmp:
641 self.assertEqual(p[layer].sport, out_port)
642 self.assertEqual(p[layer].dport, port_in)
644 self.assertEqual(p[layer].id, port_in)
645 self.assertEqual(data, p[Raw].load)
647 def frag_out_of_order_in_plus_out(self, in_addr, out_addr, in_port,
648 out_port, proto=IP_PROTOS.tcp):
650 layer = self.proto2layer(proto)
652 if proto == IP_PROTOS.tcp:
653 data = b"A" * 4 + b"B" * 16 + b"C" * 3
655 data = b"A" * 16 + b"B" * 16 + b"C" * 3
656 port_in = self.random_port()
660 pkts = self.create_stream_frag(self.pg0, out_addr,
664 self.pg0.add_stream(pkts)
665 self.pg_enable_capture(self.pg_interfaces)
667 frags = self.pg1.get_capture(len(pkts))
668 p = self.reass_frags_and_verify(frags,
671 if proto != IP_PROTOS.icmp:
672 self.assertEqual(p[layer].dport, in_port)
673 self.assertEqual(p[layer].sport, port_in)
674 self.assertEqual(p[layer].dport, in_port)
676 self.assertEqual(p[layer].id, port_in)
677 self.assertEqual(data, p[Raw].load)
680 if proto != IP_PROTOS.icmp:
681 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
683 p[layer].sport, data, proto)
685 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
686 p[layer].id, 0, data, proto,
689 self.pg1.add_stream(pkts)
690 self.pg_enable_capture(self.pg_interfaces)
692 frags = self.pg0.get_capture(len(pkts))
693 p = self.reass_frags_and_verify(frags,
696 if proto != IP_PROTOS.icmp:
697 self.assertEqual(p[layer].sport, out_port)
698 self.assertEqual(p[layer].dport, port_in)
700 self.assertEqual(p[layer].id, port_in)
701 self.assertEqual(data, p[Raw].load)
703 def init_tcp_session(self, in_if, out_if, in_port, ext_port):
705 p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
706 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
707 TCP(sport=in_port, dport=ext_port, flags="S"))
709 self.pg_enable_capture(self.pg_interfaces)
711 capture = out_if.get_capture(1)
713 out_port = p[TCP].sport
715 # SYN + ACK packet out->in
716 p = (Ether(src=out_if.remote_mac, dst=out_if.local_mac) /
717 IP(src=out_if.remote_ip4, dst=self.nat_addr) /
718 TCP(sport=ext_port, dport=out_port, flags="SA"))
720 self.pg_enable_capture(self.pg_interfaces)
725 p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
726 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
727 TCP(sport=in_port, dport=ext_port, flags="A"))
729 self.pg_enable_capture(self.pg_interfaces)
731 out_if.get_capture(1)
735 def twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False,
737 twice_nat_addr = '10.0.1.3'
745 port_in1 = port_in + 1
746 port_in2 = port_in + 2
751 server1 = self.pg0.remote_hosts[0]
752 server2 = self.pg0.remote_hosts[1]
764 eh_translate = ((not self_twice_nat) or (not lb and same_pg) or
767 self.nat_add_address(self.nat_addr)
768 self.nat_add_address(twice_nat_addr, twice_nat=1)
772 flags |= self.config_flags.NAT_IS_SELF_TWICE_NAT
774 flags |= self.config_flags.NAT_IS_TWICE_NAT
777 self.nat_add_static_mapping(pg0.remote_ip4, self.nat_addr,
782 locals = [{'addr': server1.ip4,
786 {'addr': server2.ip4,
790 out_addr = self.nat_addr
792 self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags,
793 external_addr=out_addr,
794 external_port=port_out,
795 protocol=IP_PROTOS.tcp,
796 local_num=len(locals),
798 self.nat_add_inside_interface(pg0)
799 self.nat_add_outside_interface(pg1)
805 assert client_id is not None
807 client = self.pg0.remote_hosts[0]
809 client = self.pg0.remote_hosts[1]
811 client = pg1.remote_hosts[0]
812 p = (Ether(src=pg1.remote_mac, dst=pg1.local_mac) /
813 IP(src=client.ip4, dst=self.nat_addr) /
814 TCP(sport=eh_port_out, dport=port_out))
816 self.pg_enable_capture(self.pg_interfaces)
818 capture = pg0.get_capture(1)
824 if ip.dst == server1.ip4:
830 self.assertEqual(ip.dst, server.ip4)
832 self.assertIn(tcp.dport, [port_in1, port_in2])
834 self.assertEqual(tcp.dport, port_in)
836 self.assertEqual(ip.src, twice_nat_addr)
837 self.assertNotEqual(tcp.sport, eh_port_out)
839 self.assertEqual(ip.src, client.ip4)
840 self.assertEqual(tcp.sport, eh_port_out)
842 eh_port_in = tcp.sport
843 saved_port_in = tcp.dport
844 self.assert_packet_checksums_valid(p)
846 self.logger.error(ppp("Unexpected or invalid packet:", p))
849 p = (Ether(src=server.mac, dst=pg0.local_mac) /
850 IP(src=server.ip4, dst=eh_addr_in) /
851 TCP(sport=saved_port_in, dport=eh_port_in))
853 self.pg_enable_capture(self.pg_interfaces)
855 capture = pg1.get_capture(1)
860 self.assertEqual(ip.dst, client.ip4)
861 self.assertEqual(ip.src, self.nat_addr)
862 self.assertEqual(tcp.dport, eh_port_out)
863 self.assertEqual(tcp.sport, port_out)
864 self.assert_packet_checksums_valid(p)
866 self.logger.error(ppp("Unexpected or invalid packet:", p))
870 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
871 self.assertEqual(len(sessions), 1)
872 self.assertTrue(sessions[0].flags &
873 self.config_flags.NAT_IS_EXT_HOST_VALID)
874 self.assertTrue(sessions[0].flags &
875 self.config_flags.NAT_IS_TWICE_NAT)
876 self.logger.info(self.vapi.cli("show nat44 sessions detail"))
877 self.vapi.nat44_del_session(
878 address=sessions[0].inside_ip_address,
879 port=sessions[0].inside_port,
880 protocol=sessions[0].protocol,
881 flags=(self.config_flags.NAT_IS_INSIDE |
882 self.config_flags.NAT_IS_EXT_HOST_VALID),
883 ext_host_address=sessions[0].ext_host_nat_address,
884 ext_host_port=sessions[0].ext_host_nat_port)
885 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
886 self.assertEqual(len(sessions), 0)
888 def verify_syslog_sess(self, data, is_add=True, is_ip6=False):
889 message = data.decode('utf-8')
891 message = SyslogMessage.parse(message)
892 except ParseError as e:
896 self.assertEqual(message.severity, SyslogSeverity.info)
897 self.assertEqual(message.appname, 'NAT')
898 self.assertEqual(message.msgid, 'SADD' if is_add else 'SDEL')
899 sd_params = message.sd.get('nsess')
900 self.assertTrue(sd_params is not None)
902 self.assertEqual(sd_params.get('IATYP'), 'IPv6')
903 self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip6)
905 self.assertEqual(sd_params.get('IATYP'), 'IPv4')
906 self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4)
907 self.assertTrue(sd_params.get('SSUBIX') is not None)
908 self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in)
909 self.assertEqual(sd_params.get('XATYP'), 'IPv4')
910 self.assertEqual(sd_params.get('XSADDR'), self.nat_addr)
911 self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out)
912 self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp)
913 self.assertEqual(sd_params.get('SVLAN'), '0')
914 self.assertEqual(sd_params.get('XDADDR'), self.pg1.remote_ip4)
915 self.assertEqual(sd_params.get('XDPORT'),
916 "%d" % self.tcp_external_port)
919 class TestNAT44ED(NAT44EDTestCase):
920 """ NAT44ED Test Case """
922 def test_users_dump(self):
923 """ NAT44ED API test - nat44_user_dump """
925 self.nat_add_address(self.nat_addr)
926 self.nat_add_inside_interface(self.pg0)
927 self.nat_add_outside_interface(self.pg1)
929 self.vapi.nat44_forwarding_enable_disable(enable=1)
931 local_ip = self.pg0.remote_ip4
932 external_ip = self.nat_addr
933 self.nat_add_static_mapping(local_ip, external_ip)
935 users = self.vapi.nat44_user_dump()
936 self.assertEqual(len(users), 0)
938 # in2out - static mapping match
940 pkts = self.create_stream_out(self.pg1)
941 self.pg1.add_stream(pkts)
942 self.pg_enable_capture(self.pg_interfaces)
944 capture = self.pg0.get_capture(len(pkts))
945 self.verify_capture_in(capture, self.pg0)
947 pkts = self.create_stream_in(self.pg0, self.pg1)
948 self.pg0.add_stream(pkts)
949 self.pg_enable_capture(self.pg_interfaces)
951 capture = self.pg1.get_capture(len(pkts))
952 self.verify_capture_out(capture, same_port=True)
954 users = self.vapi.nat44_user_dump()
955 self.assertEqual(len(users), 1)
956 static_user = users[0]
957 self.assertEqual(static_user.nstaticsessions, 3)
958 self.assertEqual(static_user.nsessions, 0)
960 # in2out - no static mapping match (forwarding test)
962 host0 = self.pg0.remote_hosts[0]
963 self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
965 pkts = self.create_stream_out(self.pg1,
966 dst_ip=self.pg0.remote_ip4,
967 use_inside_ports=True)
968 self.pg1.add_stream(pkts)
969 self.pg_enable_capture(self.pg_interfaces)
971 capture = self.pg0.get_capture(len(pkts))
972 self.verify_capture_in(capture, self.pg0)
974 pkts = self.create_stream_in(self.pg0, self.pg1)
975 self.pg0.add_stream(pkts)
976 self.pg_enable_capture(self.pg_interfaces)
978 capture = self.pg1.get_capture(len(pkts))
979 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
982 self.pg0.remote_hosts[0] = host0
984 users = self.vapi.nat44_user_dump()
985 self.assertEqual(len(users), 2)
986 if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4:
987 non_static_user = users[1]
988 static_user = users[0]
990 non_static_user = users[0]
991 static_user = users[1]
992 self.assertEqual(static_user.nstaticsessions, 3)
993 self.assertEqual(static_user.nsessions, 0)
994 self.assertEqual(non_static_user.nstaticsessions, 0)
995 self.assertEqual(non_static_user.nsessions, 3)
997 users = self.vapi.nat44_user_dump()
998 self.assertEqual(len(users), 2)
999 if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4:
1000 non_static_user = users[1]
1001 static_user = users[0]
1003 non_static_user = users[0]
1004 static_user = users[1]
1005 self.assertEqual(static_user.nstaticsessions, 3)
1006 self.assertEqual(static_user.nsessions, 0)
1007 self.assertEqual(non_static_user.nstaticsessions, 0)
1008 self.assertEqual(non_static_user.nsessions, 3)
1010 def test_frag_out_of_order_do_not_translate(self):
1011 """ NAT44ED don't translate fragments arriving out of order """
1012 self.nat_add_inside_interface(self.pg0)
1013 self.nat_add_outside_interface(self.pg1)
1014 self.vapi.nat44_forwarding_enable_disable(enable=True)
1015 self.frag_out_of_order(proto=IP_PROTOS.tcp, dont_translate=True)
1017 def test_forwarding(self):
1018 """ NAT44ED forwarding test """
1020 self.nat_add_inside_interface(self.pg0)
1021 self.nat_add_outside_interface(self.pg1)
1022 self.vapi.nat44_forwarding_enable_disable(enable=1)
1024 real_ip = self.pg0.remote_ip4
1025 alias_ip = self.nat_addr
1026 flags = self.config_flags.NAT_IS_ADDR_ONLY
1027 self.vapi.nat44_add_del_static_mapping(is_add=1,
1028 local_ip_address=real_ip,
1029 external_ip_address=alias_ip,
1030 external_sw_if_index=0xFFFFFFFF,
1034 # in2out - static mapping match
1036 pkts = self.create_stream_out(self.pg1)
1037 self.pg1.add_stream(pkts)
1038 self.pg_enable_capture(self.pg_interfaces)
1040 capture = self.pg0.get_capture(len(pkts))
1041 self.verify_capture_in(capture, self.pg0)
1043 pkts = self.create_stream_in(self.pg0, self.pg1)
1044 self.pg0.add_stream(pkts)
1045 self.pg_enable_capture(self.pg_interfaces)
1047 capture = self.pg1.get_capture(len(pkts))
1048 self.verify_capture_out(capture, same_port=True)
1050 # in2out - no static mapping match
1052 host0 = self.pg0.remote_hosts[0]
1053 self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
1055 pkts = self.create_stream_out(self.pg1,
1056 dst_ip=self.pg0.remote_ip4,
1057 use_inside_ports=True)
1058 self.pg1.add_stream(pkts)
1059 self.pg_enable_capture(self.pg_interfaces)
1061 capture = self.pg0.get_capture(len(pkts))
1062 self.verify_capture_in(capture, self.pg0)
1064 pkts = self.create_stream_in(self.pg0, self.pg1)
1065 self.pg0.add_stream(pkts)
1066 self.pg_enable_capture(self.pg_interfaces)
1068 capture = self.pg1.get_capture(len(pkts))
1069 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1072 self.pg0.remote_hosts[0] = host0
1074 user = self.pg0.remote_hosts[1]
1075 sessions = self.vapi.nat44_user_session_dump(user.ip4, 0)
1076 self.assertEqual(len(sessions), 3)
1077 self.assertTrue(sessions[0].flags &
1078 self.config_flags.NAT_IS_EXT_HOST_VALID)
1079 self.vapi.nat44_del_session(
1080 address=sessions[0].inside_ip_address,
1081 port=sessions[0].inside_port,
1082 protocol=sessions[0].protocol,
1083 flags=(self.config_flags.NAT_IS_INSIDE |
1084 self.config_flags.NAT_IS_EXT_HOST_VALID),
1085 ext_host_address=sessions[0].ext_host_address,
1086 ext_host_port=sessions[0].ext_host_port)
1087 sessions = self.vapi.nat44_user_session_dump(user.ip4, 0)
1088 self.assertEqual(len(sessions), 2)
1091 self.vapi.nat44_forwarding_enable_disable(enable=0)
1092 flags = self.config_flags.NAT_IS_ADDR_ONLY
1093 self.vapi.nat44_add_del_static_mapping(
1095 local_ip_address=real_ip,
1096 external_ip_address=alias_ip,
1097 external_sw_if_index=0xFFFFFFFF,
1100 def test_output_feature_and_service2(self):
1101 """ NAT44ED interface output feature and service host direct access """
1102 self.vapi.nat44_forwarding_enable_disable(enable=1)
1103 self.nat_add_address(self.nat_addr)
1105 self.vapi.nat44_interface_add_del_output_feature(
1106 sw_if_index=self.pg1.sw_if_index, is_add=1,)
1108 # session initiated from service host - translate
1109 pkts = self.create_stream_in(self.pg0, self.pg1)
1110 self.pg0.add_stream(pkts)
1111 self.pg_enable_capture(self.pg_interfaces)
1113 capture = self.pg1.get_capture(len(pkts))
1114 self.verify_capture_out(capture, ignore_port=True)
1116 pkts = self.create_stream_out(self.pg1)
1117 self.pg1.add_stream(pkts)
1118 self.pg_enable_capture(self.pg_interfaces)
1120 capture = self.pg0.get_capture(len(pkts))
1121 self.verify_capture_in(capture, self.pg0)
1123 # session initiated from remote host - do not translate
1124 tcp_port_in = self.tcp_port_in
1125 udp_port_in = self.udp_port_in
1126 icmp_id_in = self.icmp_id_in
1128 self.tcp_port_in = 60303
1129 self.udp_port_in = 60304
1130 self.icmp_id_in = 60305
1133 pkts = self.create_stream_out(self.pg1,
1134 self.pg0.remote_ip4,
1135 use_inside_ports=True)
1136 self.pg1.add_stream(pkts)
1137 self.pg_enable_capture(self.pg_interfaces)
1139 capture = self.pg0.get_capture(len(pkts))
1140 self.verify_capture_in(capture, self.pg0)
1142 pkts = self.create_stream_in(self.pg0, self.pg1)
1143 self.pg0.add_stream(pkts)
1144 self.pg_enable_capture(self.pg_interfaces)
1146 capture = self.pg1.get_capture(len(pkts))
1147 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1150 self.tcp_port_in = tcp_port_in
1151 self.udp_port_in = udp_port_in
1152 self.icmp_id_in = icmp_id_in
1154 def test_twice_nat(self):
1155 """ NAT44ED Twice NAT """
1156 self.twice_nat_common()
1158 def test_self_twice_nat_positive(self):
1159 """ NAT44ED Self Twice NAT (positive test) """
1160 self.twice_nat_common(self_twice_nat=True, same_pg=True)
1162 def test_self_twice_nat_lb_positive(self):
1163 """ NAT44ED Self Twice NAT local service load balancing (positive test)
1165 self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True,
1168 def test_twice_nat_lb(self):
1169 """ NAT44ED Twice NAT local service load balancing """
1170 self.twice_nat_common(lb=True)
1172 def test_output_feature(self):
1173 """ NAT44ED interface output feature (in2out postrouting) """
1174 self.vapi.nat44_forwarding_enable_disable(enable=1)
1175 self.nat_add_address(self.nat_addr)
1177 self.nat_add_outside_interface(self.pg0)
1178 self.vapi.nat44_interface_add_del_output_feature(
1179 sw_if_index=self.pg1.sw_if_index, is_add=1)
1182 pkts = self.create_stream_in(self.pg0, self.pg1)
1183 self.pg0.add_stream(pkts)
1184 self.pg_enable_capture(self.pg_interfaces)
1186 capture = self.pg1.get_capture(len(pkts))
1187 self.verify_capture_out(capture, ignore_port=True)
1190 pkts = self.create_stream_out(self.pg1)
1191 self.pg1.add_stream(pkts)
1192 self.pg_enable_capture(self.pg_interfaces)
1194 capture = self.pg0.get_capture(len(pkts))
1195 self.verify_capture_in(capture, self.pg0)
1197 def test_static_with_port_out2(self):
1198 """ NAT44ED 1:1 NAPT asymmetrical rule """
1203 self.vapi.nat44_forwarding_enable_disable(enable=1)
1204 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1205 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
1206 local_port, external_port,
1207 proto=IP_PROTOS.tcp, flags=flags)
1209 self.nat_add_inside_interface(self.pg0)
1210 self.nat_add_outside_interface(self.pg1)
1212 # from client to service
1213 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1214 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1215 TCP(sport=12345, dport=external_port))
1216 self.pg1.add_stream(p)
1217 self.pg_enable_capture(self.pg_interfaces)
1219 capture = self.pg0.get_capture(1)
1224 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1225 self.assertEqual(tcp.dport, local_port)
1226 self.assert_packet_checksums_valid(p)
1228 self.logger.error(ppp("Unexpected or invalid packet:", p))
1232 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
1233 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1234 ICMP(type=11) / capture[0][IP])
1235 self.pg0.add_stream(p)
1236 self.pg_enable_capture(self.pg_interfaces)
1238 capture = self.pg1.get_capture(1)
1241 self.assertEqual(p[IP].src, self.nat_addr)
1243 self.assertEqual(inner.dst, self.nat_addr)
1244 self.assertEqual(inner[TCPerror].dport, external_port)
1246 self.logger.error(ppp("Unexpected or invalid packet:", p))
1249 # from service back to client
1250 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1251 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1252 TCP(sport=local_port, dport=12345))
1253 self.pg0.add_stream(p)
1254 self.pg_enable_capture(self.pg_interfaces)
1256 capture = self.pg1.get_capture(1)
1261 self.assertEqual(ip.src, self.nat_addr)
1262 self.assertEqual(tcp.sport, external_port)
1263 self.assert_packet_checksums_valid(p)
1265 self.logger.error(ppp("Unexpected or invalid packet:", p))
1269 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1270 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1271 ICMP(type=11) / capture[0][IP])
1272 self.pg1.add_stream(p)
1273 self.pg_enable_capture(self.pg_interfaces)
1275 capture = self.pg0.get_capture(1)
1278 self.assertEqual(p[IP].dst, self.pg0.remote_ip4)
1280 self.assertEqual(inner.src, self.pg0.remote_ip4)
1281 self.assertEqual(inner[TCPerror].sport, local_port)
1283 self.logger.error(ppp("Unexpected or invalid packet:", p))
1286 # from client to server (no translation)
1287 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1288 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
1289 TCP(sport=12346, dport=local_port))
1290 self.pg1.add_stream(p)
1291 self.pg_enable_capture(self.pg_interfaces)
1293 capture = self.pg0.get_capture(1)
1298 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1299 self.assertEqual(tcp.dport, local_port)
1300 self.assert_packet_checksums_valid(p)
1302 self.logger.error(ppp("Unexpected or invalid packet:", p))
1305 # from service back to client (no translation)
1306 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1307 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1308 TCP(sport=local_port, dport=12346))
1309 self.pg0.add_stream(p)
1310 self.pg_enable_capture(self.pg_interfaces)
1312 capture = self.pg1.get_capture(1)
1317 self.assertEqual(ip.src, self.pg0.remote_ip4)
1318 self.assertEqual(tcp.sport, local_port)
1319 self.assert_packet_checksums_valid(p)
1321 self.logger.error(ppp("Unexpected or invalid packet:", p))
1324 def test_static_lb(self):
1325 """ NAT44ED local service load balancing """
1326 external_addr_n = self.nat_addr
1329 server1 = self.pg0.remote_hosts[0]
1330 server2 = self.pg0.remote_hosts[1]
1332 locals = [{'addr': server1.ip4,
1336 {'addr': server2.ip4,
1341 self.nat_add_address(self.nat_addr)
1342 self.vapi.nat44_add_del_lb_static_mapping(
1344 external_addr=external_addr_n,
1345 external_port=external_port,
1346 protocol=IP_PROTOS.tcp,
1347 local_num=len(locals),
1349 flags = self.config_flags.NAT_IS_INSIDE
1350 self.vapi.nat44_interface_add_del_feature(
1351 sw_if_index=self.pg0.sw_if_index,
1352 flags=flags, is_add=1)
1353 self.vapi.nat44_interface_add_del_feature(
1354 sw_if_index=self.pg1.sw_if_index,
1357 # from client to service
1358 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1359 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1360 TCP(sport=12345, dport=external_port))
1361 self.pg1.add_stream(p)
1362 self.pg_enable_capture(self.pg_interfaces)
1364 capture = self.pg0.get_capture(1)
1370 self.assertIn(ip.dst, [server1.ip4, server2.ip4])
1371 if ip.dst == server1.ip4:
1375 self.assertEqual(tcp.dport, local_port)
1376 self.assert_packet_checksums_valid(p)
1378 self.logger.error(ppp("Unexpected or invalid packet:", p))
1381 # from service back to client
1382 p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
1383 IP(src=server.ip4, dst=self.pg1.remote_ip4) /
1384 TCP(sport=local_port, dport=12345))
1385 self.pg0.add_stream(p)
1386 self.pg_enable_capture(self.pg_interfaces)
1388 capture = self.pg1.get_capture(1)
1393 self.assertEqual(ip.src, self.nat_addr)
1394 self.assertEqual(tcp.sport, external_port)
1395 self.assert_packet_checksums_valid(p)
1397 self.logger.error(ppp("Unexpected or invalid packet:", p))
1400 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
1401 self.assertEqual(len(sessions), 1)
1402 self.assertTrue(sessions[0].flags &
1403 self.config_flags.NAT_IS_EXT_HOST_VALID)
1404 self.vapi.nat44_del_session(
1405 address=sessions[0].inside_ip_address,
1406 port=sessions[0].inside_port,
1407 protocol=sessions[0].protocol,
1408 flags=(self.config_flags.NAT_IS_INSIDE |
1409 self.config_flags.NAT_IS_EXT_HOST_VALID),
1410 ext_host_address=sessions[0].ext_host_address,
1411 ext_host_port=sessions[0].ext_host_port)
1412 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
1413 self.assertEqual(len(sessions), 0)
1415 def test_static_lb_2(self):
1416 """ NAT44ED local service load balancing (asymmetrical rule) """
1417 external_addr = self.nat_addr
1420 server1 = self.pg0.remote_hosts[0]
1421 server2 = self.pg0.remote_hosts[1]
1423 locals = [{'addr': server1.ip4,
1427 {'addr': server2.ip4,
1432 self.vapi.nat44_forwarding_enable_disable(enable=1)
1433 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1434 self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags,
1435 external_addr=external_addr,
1436 external_port=external_port,
1437 protocol=IP_PROTOS.tcp,
1438 local_num=len(locals),
1440 flags = self.config_flags.NAT_IS_INSIDE
1441 self.vapi.nat44_interface_add_del_feature(
1442 sw_if_index=self.pg0.sw_if_index,
1443 flags=flags, is_add=1)
1444 self.vapi.nat44_interface_add_del_feature(
1445 sw_if_index=self.pg1.sw_if_index,
1448 # from client to service
1449 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1450 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1451 TCP(sport=12345, dport=external_port))
1452 self.pg1.add_stream(p)
1453 self.pg_enable_capture(self.pg_interfaces)
1455 capture = self.pg0.get_capture(1)
1461 self.assertIn(ip.dst, [server1.ip4, server2.ip4])
1462 if ip.dst == server1.ip4:
1466 self.assertEqual(tcp.dport, local_port)
1467 self.assert_packet_checksums_valid(p)
1469 self.logger.error(ppp("Unexpected or invalid packet:", p))
1472 # from service back to client
1473 p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
1474 IP(src=server.ip4, dst=self.pg1.remote_ip4) /
1475 TCP(sport=local_port, dport=12345))
1476 self.pg0.add_stream(p)
1477 self.pg_enable_capture(self.pg_interfaces)
1479 capture = self.pg1.get_capture(1)
1484 self.assertEqual(ip.src, self.nat_addr)
1485 self.assertEqual(tcp.sport, external_port)
1486 self.assert_packet_checksums_valid(p)
1488 self.logger.error(ppp("Unexpected or invalid packet:", p))
1491 # from client to server (no translation)
1492 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1493 IP(src=self.pg1.remote_ip4, dst=server1.ip4) /
1494 TCP(sport=12346, dport=local_port))
1495 self.pg1.add_stream(p)
1496 self.pg_enable_capture(self.pg_interfaces)
1498 capture = self.pg0.get_capture(1)
1504 self.assertEqual(ip.dst, server1.ip4)
1505 self.assertEqual(tcp.dport, local_port)
1506 self.assert_packet_checksums_valid(p)
1508 self.logger.error(ppp("Unexpected or invalid packet:", p))
1511 # from service back to client (no translation)
1512 p = (Ether(src=server1.mac, dst=self.pg0.local_mac) /
1513 IP(src=server1.ip4, dst=self.pg1.remote_ip4) /
1514 TCP(sport=local_port, dport=12346))
1515 self.pg0.add_stream(p)
1516 self.pg_enable_capture(self.pg_interfaces)
1518 capture = self.pg1.get_capture(1)
1523 self.assertEqual(ip.src, server1.ip4)
1524 self.assertEqual(tcp.sport, local_port)
1525 self.assert_packet_checksums_valid(p)
1527 self.logger.error(ppp("Unexpected or invalid packet:", p))
1530 def test_lb_affinity(self):
1531 """ NAT44ED local service load balancing affinity """
1532 external_addr = self.nat_addr
1535 server1 = self.pg0.remote_hosts[0]
1536 server2 = self.pg0.remote_hosts[1]
1538 locals = [{'addr': server1.ip4,
1542 {'addr': server2.ip4,
1547 self.nat_add_address(self.nat_addr)
1548 self.vapi.nat44_add_del_lb_static_mapping(is_add=1,
1549 external_addr=external_addr,
1550 external_port=external_port,
1551 protocol=IP_PROTOS.tcp,
1553 local_num=len(locals),
1555 flags = self.config_flags.NAT_IS_INSIDE
1556 self.vapi.nat44_interface_add_del_feature(
1557 sw_if_index=self.pg0.sw_if_index,
1558 flags=flags, is_add=1)
1559 self.vapi.nat44_interface_add_del_feature(
1560 sw_if_index=self.pg1.sw_if_index,
1563 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1564 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1565 TCP(sport=1025, dport=external_port))
1566 self.pg1.add_stream(p)
1567 self.pg_enable_capture(self.pg_interfaces)
1569 capture = self.pg0.get_capture(1)
1570 backend = capture[0][IP].dst
1572 sessions = self.vapi.nat44_user_session_dump(backend, 0)
1573 self.assertEqual(len(sessions), 1)
1574 self.assertTrue(sessions[0].flags &
1575 self.config_flags.NAT_IS_EXT_HOST_VALID)
1576 self.vapi.nat44_del_session(
1577 address=sessions[0].inside_ip_address,
1578 port=sessions[0].inside_port,
1579 protocol=sessions[0].protocol,
1580 flags=(self.config_flags.NAT_IS_INSIDE |
1581 self.config_flags.NAT_IS_EXT_HOST_VALID),
1582 ext_host_address=sessions[0].ext_host_address,
1583 ext_host_port=sessions[0].ext_host_port)
1586 for port in range(1030, 1100):
1587 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1588 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1589 TCP(sport=port, dport=external_port))
1591 self.pg1.add_stream(pkts)
1592 self.pg_enable_capture(self.pg_interfaces)
1594 capture = self.pg0.get_capture(len(pkts))
1596 self.assertEqual(p[IP].dst, backend)
1598 def test_multiple_vrf(self):
1599 """ NAT44ED Multiple VRF setup """
1601 external_addr = '1.2.3.4'
1606 self.vapi.nat44_forwarding_enable_disable(enable=1)
1607 self.nat_add_address(self.nat_addr)
1608 flags = self.config_flags.NAT_IS_INSIDE
1609 self.vapi.nat44_interface_add_del_feature(
1610 sw_if_index=self.pg0.sw_if_index,
1612 self.vapi.nat44_interface_add_del_feature(
1613 sw_if_index=self.pg0.sw_if_index,
1614 is_add=1, flags=flags)
1615 self.vapi.nat44_interface_add_del_output_feature(
1616 sw_if_index=self.pg1.sw_if_index,
1618 self.vapi.nat44_interface_add_del_feature(
1619 sw_if_index=self.pg5.sw_if_index,
1621 self.vapi.nat44_interface_add_del_feature(
1622 sw_if_index=self.pg5.sw_if_index,
1623 is_add=1, flags=flags)
1624 self.vapi.nat44_interface_add_del_feature(
1625 sw_if_index=self.pg6.sw_if_index,
1627 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1628 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1629 local_port, external_port, vrf_id=1,
1630 proto=IP_PROTOS.tcp, flags=flags)
1631 self.nat_add_static_mapping(
1632 self.pg0.remote_ip4,
1633 external_sw_if_index=self.pg0.sw_if_index,
1634 local_port=local_port,
1636 external_port=external_port,
1637 proto=IP_PROTOS.tcp,
1641 # from client to service (both VRF1)
1642 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1643 IP(src=self.pg6.remote_ip4, dst=external_addr) /
1644 TCP(sport=12345, dport=external_port))
1645 self.pg6.add_stream(p)
1646 self.pg_enable_capture(self.pg_interfaces)
1648 capture = self.pg5.get_capture(1)
1653 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1654 self.assertEqual(tcp.dport, local_port)
1655 self.assert_packet_checksums_valid(p)
1657 self.logger.error(ppp("Unexpected or invalid packet:", p))
1660 # from service back to client (both VRF1)
1661 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1662 IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) /
1663 TCP(sport=local_port, dport=12345))
1664 self.pg5.add_stream(p)
1665 self.pg_enable_capture(self.pg_interfaces)
1667 capture = self.pg6.get_capture(1)
1672 self.assertEqual(ip.src, external_addr)
1673 self.assertEqual(tcp.sport, external_port)
1674 self.assert_packet_checksums_valid(p)
1676 self.logger.error(ppp("Unexpected or invalid packet:", p))
1679 # dynamic NAT from VRF1 to VRF0 (output-feature)
1680 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1681 IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) /
1682 TCP(sport=2345, dport=22))
1683 self.pg5.add_stream(p)
1684 self.pg_enable_capture(self.pg_interfaces)
1686 capture = self.pg1.get_capture(1)
1691 self.assertEqual(ip.src, self.nat_addr)
1692 self.assert_packet_checksums_valid(p)
1695 self.logger.error(ppp("Unexpected or invalid packet:", p))
1698 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1699 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1700 TCP(sport=22, dport=port))
1701 self.pg1.add_stream(p)
1702 self.pg_enable_capture(self.pg_interfaces)
1704 capture = self.pg5.get_capture(1)
1709 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1710 self.assertEqual(tcp.dport, 2345)
1711 self.assert_packet_checksums_valid(p)
1713 self.logger.error(ppp("Unexpected or invalid packet:", p))
1716 # from client VRF1 to service VRF0
1717 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1718 IP(src=self.pg6.remote_ip4, dst=self.pg0.local_ip4) /
1719 TCP(sport=12346, dport=external_port))
1720 self.pg6.add_stream(p)
1721 self.pg_enable_capture(self.pg_interfaces)
1723 capture = self.pg0.get_capture(1)
1728 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1729 self.assertEqual(tcp.dport, local_port)
1730 self.assert_packet_checksums_valid(p)
1732 self.logger.error(ppp("Unexpected or invalid packet:", p))
1735 # from service VRF0 back to client VRF1
1736 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1737 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1738 TCP(sport=local_port, dport=12346))
1739 self.pg0.add_stream(p)
1740 self.pg_enable_capture(self.pg_interfaces)
1742 capture = self.pg6.get_capture(1)
1747 self.assertEqual(ip.src, self.pg0.local_ip4)
1748 self.assertEqual(tcp.sport, external_port)
1749 self.assert_packet_checksums_valid(p)
1751 self.logger.error(ppp("Unexpected or invalid packet:", p))
1754 # from client VRF0 to service VRF1
1755 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1756 IP(src=self.pg0.remote_ip4, dst=external_addr) /
1757 TCP(sport=12347, dport=external_port))
1758 self.pg0.add_stream(p)
1759 self.pg_enable_capture(self.pg_interfaces)
1761 capture = self.pg5.get_capture(1)
1766 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1767 self.assertEqual(tcp.dport, local_port)
1768 self.assert_packet_checksums_valid(p)
1770 self.logger.error(ppp("Unexpected or invalid packet:", p))
1773 # from service VRF1 back to client VRF0
1774 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1775 IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) /
1776 TCP(sport=local_port, dport=12347))
1777 self.pg5.add_stream(p)
1778 self.pg_enable_capture(self.pg_interfaces)
1780 capture = self.pg0.get_capture(1)
1785 self.assertEqual(ip.src, external_addr)
1786 self.assertEqual(tcp.sport, external_port)
1787 self.assert_packet_checksums_valid(p)
1789 self.logger.error(ppp("Unexpected or invalid packet:", p))
1792 # from client to server (both VRF1, no translation)
1793 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1794 IP(src=self.pg6.remote_ip4, dst=self.pg5.remote_ip4) /
1795 TCP(sport=12348, dport=local_port))
1796 self.pg6.add_stream(p)
1797 self.pg_enable_capture(self.pg_interfaces)
1799 capture = self.pg5.get_capture(1)
1804 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1805 self.assertEqual(tcp.dport, local_port)
1806 self.assert_packet_checksums_valid(p)
1808 self.logger.error(ppp("Unexpected or invalid packet:", p))
1811 # from server back to client (both VRF1, no translation)
1812 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1813 IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) /
1814 TCP(sport=local_port, dport=12348))
1815 self.pg5.add_stream(p)
1816 self.pg_enable_capture(self.pg_interfaces)
1818 capture = self.pg6.get_capture(1)
1823 self.assertEqual(ip.src, self.pg5.remote_ip4)
1824 self.assertEqual(tcp.sport, local_port)
1825 self.assert_packet_checksums_valid(p)
1827 self.logger.error(ppp("Unexpected or invalid packet:", p))
1830 # from client VRF1 to server VRF0 (no translation)
1831 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1832 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1833 TCP(sport=local_port, dport=12349))
1834 self.pg0.add_stream(p)
1835 self.pg_enable_capture(self.pg_interfaces)
1837 capture = self.pg6.get_capture(1)
1842 self.assertEqual(ip.src, self.pg0.remote_ip4)
1843 self.assertEqual(tcp.sport, local_port)
1844 self.assert_packet_checksums_valid(p)
1846 self.logger.error(ppp("Unexpected or invalid packet:", p))
1849 # from server VRF0 back to client VRF1 (no translation)
1850 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1851 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1852 TCP(sport=local_port, dport=12349))
1853 self.pg0.add_stream(p)
1854 self.pg_enable_capture(self.pg_interfaces)
1856 capture = self.pg6.get_capture(1)
1861 self.assertEqual(ip.src, self.pg0.remote_ip4)
1862 self.assertEqual(tcp.sport, local_port)
1863 self.assert_packet_checksums_valid(p)
1865 self.logger.error(ppp("Unexpected or invalid packet:", p))
1868 # from client VRF0 to server VRF1 (no translation)
1869 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1870 IP(src=self.pg0.remote_ip4, dst=self.pg5.remote_ip4) /
1871 TCP(sport=12344, dport=local_port))
1872 self.pg0.add_stream(p)
1873 self.pg_enable_capture(self.pg_interfaces)
1875 capture = self.pg5.get_capture(1)
1880 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1881 self.assertEqual(tcp.dport, local_port)
1882 self.assert_packet_checksums_valid(p)
1884 self.logger.error(ppp("Unexpected or invalid packet:", p))
1887 # from server VRF1 back to client VRF0 (no translation)
1888 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1889 IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) /
1890 TCP(sport=local_port, dport=12344))
1891 self.pg5.add_stream(p)
1892 self.pg_enable_capture(self.pg_interfaces)
1894 capture = self.pg0.get_capture(1)
1899 self.assertEqual(ip.src, self.pg5.remote_ip4)
1900 self.assertEqual(tcp.sport, local_port)
1901 self.assert_packet_checksums_valid(p)
1903 self.logger.error(ppp("Unexpected or invalid packet:", p))
1907 class TestNAT44EDMW(TestNAT44ED):
1908 """ NAT44ED MW Test Case """
1909 worker_config = "workers 1"
1911 def get_stats_counter(self, path, worker=1):
1912 return super(TestNAT44EDMW, self).get_stats_counter(path, worker)
1914 @unittest.skip('MW fix required')
1915 def test_users_dump(self):
1916 """ NAT44ED API test - nat44_user_dump """
1918 @unittest.skip('MW fix required')
1919 def test_frag_out_of_order_do_not_translate(self):
1920 """ NAT44ED don't translate fragments arriving out of order """
1922 @unittest.skip('MW fix required')
1923 def test_forwarding(self):
1924 """ NAT44ED forwarding test """
1926 @unittest.skip('MW fix required')
1927 def test_twice_nat(self):
1928 """ NAT44ED Twice NAT """
1930 @unittest.skip('MW fix required')
1931 def test_twice_nat_lb(self):
1932 """ NAT44ED Twice NAT local service load balancing """
1934 @unittest.skip('MW fix required')
1935 def test_output_feature(self):
1936 """ NAT44ED interface output feature (in2out postrouting) """
1938 @unittest.skip('MW fix required')
1939 def test_static_with_port_out2(self):
1940 """ NAT44ED 1:1 NAPT asymmetrical rule """
1942 @unittest.skip('MW fix required')
1943 def test_output_feature_and_service2(self):
1944 """ NAT44ED interface output feature and service host direct access """
1946 @unittest.skip('MW fix required')
1947 def test_static_lb(self):
1948 """ NAT44ED local service load balancing """
1950 @unittest.skip('MW fix required')
1951 def test_static_lb_2(self):
1952 """ NAT44ED local service load balancing (asymmetrical rule) """
1954 @unittest.skip('MW fix required')
1955 def test_lb_affinity(self):
1956 """ NAT44ED local service load balancing affinity """
1958 @unittest.skip('MW fix required')
1959 def test_multiple_vrf(self):
1960 """ NAT44ED Multiple VRF setup """
1962 @unittest.skip('MW fix required')
1963 def test_self_twice_nat_positive(self):
1964 """ NAT44ED Self Twice NAT (positive test) """
1966 @unittest.skip('MW fix required')
1967 def test_self_twice_nat_lb_positive(self):
1968 """ NAT44ED Self Twice NAT local service load balancing (positive test)
1971 def test_dynamic(self):
1972 """ NAT44ED dynamic translation test """
1974 self.nat_add_address(self.nat_addr)
1975 self.nat_add_inside_interface(self.pg0)
1976 self.nat_add_outside_interface(self.pg1)
1979 tc1 = self.get_stats_counter('/nat44/ed/in2out/slowpath/tcp')
1980 uc1 = self.get_stats_counter('/nat44/ed/in2out/slowpath/udp')
1981 ic1 = self.get_stats_counter('/nat44/ed/in2out/slowpath/icmp')
1982 dc1 = self.get_stats_counter('/nat44/ed/in2out/slowpath/drops')
1984 pkts = self.create_stream_in(self.pg0, self.pg1)
1985 # TODO: specify worker=idx, also stats have to
1986 # know from which worker to take capture
1987 self.pg0.add_stream(pkts)
1988 self.pg_enable_capture(self.pg_interfaces)
1990 capture = self.pg1.get_capture(len(pkts))
1991 self.verify_capture_out(capture, ignore_port=True)
1993 if_idx = self.pg0.sw_if_index
1994 tc2 = self.get_stats_counter('/nat44/ed/in2out/slowpath/tcp')
1995 uc2 = self.get_stats_counter('/nat44/ed/in2out/slowpath/udp')
1996 ic2 = self.get_stats_counter('/nat44/ed/in2out/slowpath/icmp')
1997 dc2 = self.get_stats_counter('/nat44/ed/in2out/slowpath/drops')
1999 self.assertEqual(tc2[if_idx] - tc1[if_idx], 2)
2000 self.assertEqual(uc2[if_idx] - uc1[if_idx], 1)
2001 self.assertEqual(ic2[if_idx] - ic1[if_idx], 1)
2002 self.assertEqual(dc2[if_idx] - dc1[if_idx], 0)
2005 tc1 = self.get_stats_counter('/nat44/ed/out2in/fastpath/tcp')
2006 uc1 = self.get_stats_counter('/nat44/ed/out2in/fastpath/udp')
2007 ic1 = self.get_stats_counter('/nat44/ed/out2in/fastpath/icmp')
2008 dc1 = self.get_stats_counter('/nat44/ed/out2in/fastpath/drops')
2010 pkts = self.create_stream_out(self.pg1)
2011 self.pg1.add_stream(pkts)
2012 self.pg_enable_capture(self.pg_interfaces)
2014 capture = self.pg0.get_capture(len(pkts))
2015 self.verify_capture_in(capture, self.pg0)
2017 if_idx = self.pg1.sw_if_index
2018 tc2 = self.get_stats_counter('/nat44/ed/out2in/fastpath/tcp')
2019 uc2 = self.get_stats_counter('/nat44/ed/out2in/fastpath/udp')
2020 ic2 = self.get_stats_counter('/nat44/ed/out2in/fastpath/icmp')
2021 dc2 = self.get_stats_counter('/nat44/ed/out2in/fastpath/drops')
2023 self.assertEqual(tc2[if_idx] - tc1[if_idx], 2)
2024 self.assertEqual(uc2[if_idx] - uc1[if_idx], 1)
2025 self.assertEqual(ic2[if_idx] - ic1[if_idx], 1)
2026 self.assertEqual(dc2[if_idx] - dc1[if_idx], 0)
2028 sc = self.get_stats_counter('/nat44/total-sessions')
2029 self.assertEqual(sc[0], 3)
2031 def test_frag_in_order(self):
2032 """ NAT44ED translate fragments arriving in order """
2034 self.nat_add_address(self.nat_addr)
2035 self.nat_add_inside_interface(self.pg0)
2036 self.nat_add_outside_interface(self.pg1)
2038 self.frag_in_order(proto=IP_PROTOS.tcp, ignore_port=True)
2039 self.frag_in_order(proto=IP_PROTOS.udp, ignore_port=True)
2040 self.frag_in_order(proto=IP_PROTOS.icmp, ignore_port=True)
2042 def test_frag_in_order_do_not_translate(self):
2043 """ NAT44ED don't translate fragments arriving in order """
2045 self.nat_add_address(self.nat_addr)
2046 self.nat_add_inside_interface(self.pg0)
2047 self.nat_add_outside_interface(self.pg1)
2048 self.vapi.nat44_forwarding_enable_disable(enable=True)
2050 self.frag_in_order(proto=IP_PROTOS.tcp, dont_translate=True)
2052 def test_frag_out_of_order(self):
2053 """ NAT44ED translate fragments arriving out of order """
2055 self.nat_add_address(self.nat_addr)
2056 self.nat_add_inside_interface(self.pg0)
2057 self.nat_add_outside_interface(self.pg1)
2059 self.frag_out_of_order(proto=IP_PROTOS.tcp, ignore_port=True)
2060 self.frag_out_of_order(proto=IP_PROTOS.udp, ignore_port=True)
2061 self.frag_out_of_order(proto=IP_PROTOS.icmp, ignore_port=True)
2063 def test_frag_in_order_in_plus_out(self):
2064 """ NAT44ED in+out interface fragments in order """
2066 in_port = self.random_port()
2067 out_port = self.random_port()
2069 self.nat_add_address(self.nat_addr)
2070 self.nat_add_inside_interface(self.pg0)
2071 self.nat_add_outside_interface(self.pg0)
2072 self.nat_add_inside_interface(self.pg1)
2073 self.nat_add_outside_interface(self.pg1)
2075 # add static mappings for server
2076 self.nat_add_static_mapping(self.server_addr,
2080 proto=IP_PROTOS.tcp)
2081 self.nat_add_static_mapping(self.server_addr,
2085 proto=IP_PROTOS.udp)
2086 self.nat_add_static_mapping(self.server_addr,
2088 proto=IP_PROTOS.icmp)
2090 # run tests for each protocol
2091 self.frag_in_order_in_plus_out(self.server_addr,
2096 self.frag_in_order_in_plus_out(self.server_addr,
2101 self.frag_in_order_in_plus_out(self.server_addr,
2107 def test_frag_out_of_order_in_plus_out(self):
2108 """ NAT44ED in+out interface fragments out of order """
2110 in_port = self.random_port()
2111 out_port = self.random_port()
2113 self.nat_add_address(self.nat_addr)
2114 self.nat_add_inside_interface(self.pg0)
2115 self.nat_add_outside_interface(self.pg0)
2116 self.nat_add_inside_interface(self.pg1)
2117 self.nat_add_outside_interface(self.pg1)
2119 # add static mappings for server
2120 self.nat_add_static_mapping(self.server_addr,
2124 proto=IP_PROTOS.tcp)
2125 self.nat_add_static_mapping(self.server_addr,
2129 proto=IP_PROTOS.udp)
2130 self.nat_add_static_mapping(self.server_addr,
2132 proto=IP_PROTOS.icmp)
2134 # run tests for each protocol
2135 self.frag_out_of_order_in_plus_out(self.server_addr,
2140 self.frag_out_of_order_in_plus_out(self.server_addr,
2145 self.frag_out_of_order_in_plus_out(self.server_addr,
2151 def test_reass_hairpinning(self):
2152 """ NAT44ED fragments hairpinning """
2154 server_addr = self.pg0.remote_hosts[1].ip4
2156 host_in_port = self.random_port()
2157 server_in_port = self.random_port()
2158 server_out_port = self.random_port()
2160 self.nat_add_address(self.nat_addr)
2161 self.nat_add_inside_interface(self.pg0)
2162 self.nat_add_outside_interface(self.pg1)
2164 # add static mapping for server
2165 self.nat_add_static_mapping(server_addr, self.nat_addr,
2166 server_in_port, server_out_port,
2167 proto=IP_PROTOS.tcp)
2168 self.nat_add_static_mapping(server_addr, self.nat_addr,
2169 server_in_port, server_out_port,
2170 proto=IP_PROTOS.udp)
2171 self.nat_add_static_mapping(server_addr, self.nat_addr)
2173 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2174 host_in_port, proto=IP_PROTOS.tcp,
2176 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2177 host_in_port, proto=IP_PROTOS.udp,
2179 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2180 host_in_port, proto=IP_PROTOS.icmp,
2183 def test_session_limit_per_vrf(self):
2184 """ NAT44ED per vrf session limit """
2187 inside_vrf10 = self.pg2
2192 # 2 interfaces pg0, pg1 (vrf10, limit 1 tcp session)
2193 # non existing vrf_id makes process core dump
2194 self.vapi.nat44_set_session_limit(session_limit=limit, vrf_id=10)
2196 self.nat_add_inside_interface(inside)
2197 self.nat_add_inside_interface(inside_vrf10)
2198 self.nat_add_outside_interface(outside)
2201 self.nat_add_interface_address(outside)
2203 # BUG: causing core dump - when bad vrf_id is specified
2204 # self.nat_add_address(outside.local_ip4, vrf_id=20)
2206 stream = self.create_tcp_stream(inside_vrf10, outside, limit * 2)
2207 inside_vrf10.add_stream(stream)
2209 self.pg_enable_capture(self.pg_interfaces)
2212 capture = outside.get_capture(limit)
2214 stream = self.create_tcp_stream(inside, outside, limit * 2)
2215 inside.add_stream(stream)
2217 self.pg_enable_capture(self.pg_interfaces)
2220 capture = outside.get_capture(len(stream))
2222 def test_clear_sessions(self):
2223 """ NAT44ED session clearing test """
2225 self.nat_add_address(self.nat_addr)
2226 self.nat_add_inside_interface(self.pg0)
2227 self.nat_add_outside_interface(self.pg1)
2229 pkts = self.create_stream_in(self.pg0, self.pg1)
2230 self.pg0.add_stream(pkts)
2231 self.pg_enable_capture(self.pg_interfaces)
2233 capture = self.pg1.get_capture(len(pkts))
2234 self.verify_capture_out(capture, ignore_port=True)
2236 sessions = self.get_stats_counter('/nat44/total-sessions')
2237 self.assertTrue(sessions[0] > 0)
2239 self.vapi.cli("clear nat44 sessions")
2241 sessions = self.get_stats_counter('/nat44/total-sessions')
2242 self.assertEqual(sessions[0], 0)
2244 def test_show_max_translations(self):
2245 """ NAT44ED API test - max translations per thread """
2246 nat_config = self.vapi.nat_show_config_2()
2247 self.assertEqual(self.max_sessions,
2248 nat_config.max_translations_per_thread)
2250 def test_lru_cleanup(self):
2251 """ NAT44ED LRU cleanup algorithm """
2253 self.nat_add_address(self.nat_addr)
2254 self.nat_add_inside_interface(self.pg0)
2255 self.nat_add_outside_interface(self.pg1)
2257 self.vapi.nat_set_timeouts(
2258 udp=1, tcp_established=7440, tcp_transitory=30, icmp=1)
2260 tcp_port_out = self.init_tcp_session(self.pg0, self.pg1, 2000, 80)
2262 for i in range(0, self.max_sessions - 1):
2263 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2264 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
2265 UDP(sport=7000+i, dport=80))
2268 self.pg0.add_stream(pkts)
2269 self.pg_enable_capture(self.pg_interfaces)
2271 self.pg1.get_capture(len(pkts))
2272 self.sleep(1.5, "wait for timeouts")
2275 for i in range(0, self.max_sessions - 1):
2276 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2277 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
2278 ICMP(id=8000+i, type='echo-request'))
2281 self.pg0.add_stream(pkts)
2282 self.pg_enable_capture(self.pg_interfaces)
2284 self.pg1.get_capture(len(pkts))
2286 def test_session_rst_timeout(self):
2287 """ NAT44ED session RST timeouts """
2289 self.nat_add_address(self.nat_addr)
2290 self.nat_add_inside_interface(self.pg0)
2291 self.nat_add_outside_interface(self.pg1)
2293 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
2294 tcp_transitory=5, icmp=60)
2296 self.init_tcp_session(self.pg0, self.pg1, self.tcp_port_in,
2297 self.tcp_external_port)
2298 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2299 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2300 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2302 self.pg0.add_stream(p)
2303 self.pg_enable_capture(self.pg_interfaces)
2305 self.pg1.get_capture(1)
2309 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2310 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2311 TCP(sport=self.tcp_port_in + 1, dport=self.tcp_external_port + 1,
2313 self.pg0.add_stream(p)
2314 self.pg_enable_capture(self.pg_interfaces)
2316 self.pg1.get_capture(1)
2318 def test_dynamic_out_of_ports(self):
2319 """ NAT44ED dynamic translation test: out of ports """
2321 self.nat_add_inside_interface(self.pg0)
2322 self.nat_add_outside_interface(self.pg1)
2324 # in2out and no NAT addresses added
2325 err_old = self.statistics.get_err_counter(
2326 '/err/nat44-ed-in2out-slowpath/out of ports')
2328 pkts = self.create_stream_in(self.pg0, self.pg1)
2329 self.pg0.add_stream(pkts)
2330 self.pg_enable_capture(self.pg_interfaces)
2332 self.pg1.get_capture(0, timeout=1)
2334 err_new = self.statistics.get_err_counter(
2335 '/err/nat44-ed-in2out-slowpath/out of ports')
2337 self.assertEqual(err_new - err_old, len(pkts))
2339 # in2out after NAT addresses added
2340 self.nat_add_address(self.nat_addr)
2342 err_old = self.statistics.get_err_counter(
2343 '/err/nat44-ed-in2out-slowpath/out of ports')
2345 pkts = self.create_stream_in(self.pg0, self.pg1)
2346 self.pg0.add_stream(pkts)
2347 self.pg_enable_capture(self.pg_interfaces)
2349 capture = self.pg1.get_capture(len(pkts))
2350 self.verify_capture_out(capture, ignore_port=True)
2352 err_new = self.statistics.get_err_counter(
2353 '/err/nat44-ed-in2out-slowpath/out of ports')
2355 self.assertEqual(err_new, err_old)
2357 def test_unknown_proto(self):
2358 """ NAT44ED translate packet with unknown protocol """
2360 self.nat_add_address(self.nat_addr)
2361 self.nat_add_inside_interface(self.pg0)
2362 self.nat_add_outside_interface(self.pg1)
2365 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2366 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2367 TCP(sport=self.tcp_port_in, dport=20))
2368 self.pg0.add_stream(p)
2369 self.pg_enable_capture(self.pg_interfaces)
2371 p = self.pg1.get_capture(1)
2373 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2374 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2376 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2377 TCP(sport=1234, dport=1234))
2378 self.pg0.add_stream(p)
2379 self.pg_enable_capture(self.pg_interfaces)
2381 p = self.pg1.get_capture(1)
2384 self.assertEqual(packet[IP].src, self.nat_addr)
2385 self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
2386 self.assertEqual(packet.haslayer(GRE), 1)
2387 self.assert_packet_checksums_valid(packet)
2389 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2393 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2394 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2396 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2397 TCP(sport=1234, dport=1234))
2398 self.pg1.add_stream(p)
2399 self.pg_enable_capture(self.pg_interfaces)
2401 p = self.pg0.get_capture(1)
2404 self.assertEqual(packet[IP].src, self.pg1.remote_ip4)
2405 self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
2406 self.assertEqual(packet.haslayer(GRE), 1)
2407 self.assert_packet_checksums_valid(packet)
2409 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2412 def test_hairpinning_unknown_proto(self):
2413 """ NAT44ED translate packet with unknown protocol - hairpinning """
2414 host = self.pg0.remote_hosts[0]
2415 server = self.pg0.remote_hosts[1]
2417 server_out_port = 8765
2418 server_nat_ip = "10.0.0.11"
2420 self.nat_add_address(self.nat_addr)
2421 self.nat_add_inside_interface(self.pg0)
2422 self.nat_add_outside_interface(self.pg1)
2424 # add static mapping for server
2425 self.nat_add_static_mapping(server.ip4, server_nat_ip)
2428 p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
2429 IP(src=host.ip4, dst=server_nat_ip) /
2430 TCP(sport=host_in_port, dport=server_out_port))
2431 self.pg0.add_stream(p)
2432 self.pg_enable_capture(self.pg_interfaces)
2434 self.pg0.get_capture(1)
2436 p = (Ether(dst=self.pg0.local_mac, src=host.mac) /
2437 IP(src=host.ip4, dst=server_nat_ip) /
2439 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2440 TCP(sport=1234, dport=1234))
2441 self.pg0.add_stream(p)
2442 self.pg_enable_capture(self.pg_interfaces)
2444 p = self.pg0.get_capture(1)
2447 self.assertEqual(packet[IP].src, self.nat_addr)
2448 self.assertEqual(packet[IP].dst, server.ip4)
2449 self.assertEqual(packet.haslayer(GRE), 1)
2450 self.assert_packet_checksums_valid(packet)
2452 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2456 p = (Ether(dst=self.pg0.local_mac, src=server.mac) /
2457 IP(src=server.ip4, dst=self.nat_addr) /
2459 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2460 TCP(sport=1234, dport=1234))
2461 self.pg0.add_stream(p)
2462 self.pg_enable_capture(self.pg_interfaces)
2464 p = self.pg0.get_capture(1)
2467 self.assertEqual(packet[IP].src, server_nat_ip)
2468 self.assertEqual(packet[IP].dst, host.ip4)
2469 self.assertEqual(packet.haslayer(GRE), 1)
2470 self.assert_packet_checksums_valid(packet)
2472 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2475 def test_output_feature_and_service(self):
2476 """ NAT44ED interface output feature and services """
2477 external_addr = '1.2.3.4'
2481 self.vapi.nat44_forwarding_enable_disable(enable=1)
2482 self.nat_add_address(self.nat_addr)
2483 flags = self.config_flags.NAT_IS_ADDR_ONLY
2484 self.vapi.nat44_add_del_identity_mapping(
2485 ip_address=self.pg1.remote_ip4, sw_if_index=0xFFFFFFFF,
2486 flags=flags, is_add=1)
2487 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
2488 self.nat_add_static_mapping(self.pg0.remote_ip4, external_addr,
2489 local_port, external_port,
2490 proto=IP_PROTOS.tcp, flags=flags)
2492 self.nat_add_inside_interface(self.pg0)
2493 self.nat_add_outside_interface(self.pg0)
2494 self.vapi.nat44_interface_add_del_output_feature(
2495 sw_if_index=self.pg1.sw_if_index, is_add=1)
2497 # from client to service
2498 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2499 IP(src=self.pg1.remote_ip4, dst=external_addr) /
2500 TCP(sport=12345, dport=external_port))
2501 self.pg1.add_stream(p)
2502 self.pg_enable_capture(self.pg_interfaces)
2504 capture = self.pg0.get_capture(1)
2509 self.assertEqual(ip.dst, self.pg0.remote_ip4)
2510 self.assertEqual(tcp.dport, local_port)
2511 self.assert_packet_checksums_valid(p)
2513 self.logger.error(ppp("Unexpected or invalid packet:", p))
2516 # from service back to client
2517 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2518 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2519 TCP(sport=local_port, dport=12345))
2520 self.pg0.add_stream(p)
2521 self.pg_enable_capture(self.pg_interfaces)
2523 capture = self.pg1.get_capture(1)
2528 self.assertEqual(ip.src, external_addr)
2529 self.assertEqual(tcp.sport, external_port)
2530 self.assert_packet_checksums_valid(p)
2532 self.logger.error(ppp("Unexpected or invalid packet:", p))
2535 # from local network host to external network
2536 pkts = self.create_stream_in(self.pg0, self.pg1)
2537 self.pg0.add_stream(pkts)
2538 self.pg_enable_capture(self.pg_interfaces)
2540 capture = self.pg1.get_capture(len(pkts))
2541 self.verify_capture_out(capture, ignore_port=True)
2542 pkts = self.create_stream_in(self.pg0, self.pg1)
2543 self.pg0.add_stream(pkts)
2544 self.pg_enable_capture(self.pg_interfaces)
2546 capture = self.pg1.get_capture(len(pkts))
2547 self.verify_capture_out(capture, ignore_port=True)
2549 # from external network back to local network host
2550 pkts = self.create_stream_out(self.pg1)
2551 self.pg1.add_stream(pkts)
2552 self.pg_enable_capture(self.pg_interfaces)
2554 capture = self.pg0.get_capture(len(pkts))
2555 self.verify_capture_in(capture, self.pg0)
2557 def test_output_feature_and_service3(self):
2558 """ NAT44ED interface output feature and DST NAT """
2559 external_addr = '1.2.3.4'
2563 self.vapi.nat44_forwarding_enable_disable(enable=1)
2564 self.nat_add_address(self.nat_addr)
2565 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
2566 self.nat_add_static_mapping(self.pg1.remote_ip4, external_addr,
2567 local_port, external_port,
2568 proto=IP_PROTOS.tcp, flags=flags)
2570 self.nat_add_inside_interface(self.pg0)
2571 self.nat_add_outside_interface(self.pg0)
2572 self.vapi.nat44_interface_add_del_output_feature(
2573 sw_if_index=self.pg1.sw_if_index, is_add=1)
2575 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2576 IP(src=self.pg0.remote_ip4, dst=external_addr) /
2577 TCP(sport=12345, dport=external_port))
2578 self.pg0.add_stream(p)
2579 self.pg_enable_capture(self.pg_interfaces)
2581 capture = self.pg1.get_capture(1)
2586 self.assertEqual(ip.src, self.pg0.remote_ip4)
2587 self.assertEqual(tcp.sport, 12345)
2588 self.assertEqual(ip.dst, self.pg1.remote_ip4)
2589 self.assertEqual(tcp.dport, local_port)
2590 self.assert_packet_checksums_valid(p)
2592 self.logger.error(ppp("Unexpected or invalid packet:", p))
2595 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2596 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
2597 TCP(sport=local_port, dport=12345))
2598 self.pg1.add_stream(p)
2599 self.pg_enable_capture(self.pg_interfaces)
2601 capture = self.pg0.get_capture(1)
2606 self.assertEqual(ip.src, external_addr)
2607 self.assertEqual(tcp.sport, external_port)
2608 self.assertEqual(ip.dst, self.pg0.remote_ip4)
2609 self.assertEqual(tcp.dport, 12345)
2610 self.assert_packet_checksums_valid(p)
2612 self.logger.error(ppp("Unexpected or invalid packet:", p))
2615 def test_self_twice_nat_lb_negative(self):
2616 """ NAT44ED Self Twice NAT local service load balancing (negative test)
2618 self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True,
2621 def test_self_twice_nat_negative(self):
2622 """ NAT44ED Self Twice NAT (negative test) """
2623 self.twice_nat_common(self_twice_nat=True)
2625 def test_static_lb_multi_clients(self):
2626 """ NAT44ED local service load balancing - multiple clients"""
2628 external_addr = self.nat_addr
2631 server1 = self.pg0.remote_hosts[0]
2632 server2 = self.pg0.remote_hosts[1]
2633 server3 = self.pg0.remote_hosts[2]
2635 locals = [{'addr': server1.ip4,
2639 {'addr': server2.ip4,
2644 flags = self.config_flags.NAT_IS_INSIDE
2645 self.vapi.nat44_interface_add_del_feature(
2646 sw_if_index=self.pg0.sw_if_index,
2647 flags=flags, is_add=1)
2648 self.vapi.nat44_interface_add_del_feature(
2649 sw_if_index=self.pg1.sw_if_index,
2652 self.nat_add_address(self.nat_addr)
2653 self.vapi.nat44_add_del_lb_static_mapping(is_add=1,
2654 external_addr=external_addr,
2655 external_port=external_port,
2656 protocol=IP_PROTOS.tcp,
2657 local_num=len(locals),
2662 clients = ip4_range(self.pg1.remote_ip4, 10, 50)
2664 for client in clients:
2665 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2666 IP(src=client, dst=self.nat_addr) /
2667 TCP(sport=12345, dport=external_port))
2669 self.pg1.add_stream(pkts)
2670 self.pg_enable_capture(self.pg_interfaces)
2672 capture = self.pg0.get_capture(len(pkts))
2674 if p[IP].dst == server1.ip4:
2678 self.assertGreater(server1_n, server2_n)
2681 'addr': server3.ip4,
2688 self.vapi.nat44_lb_static_mapping_add_del_local(
2690 external_addr=external_addr,
2691 external_port=external_port,
2693 protocol=IP_PROTOS.tcp)
2697 clients = ip4_range(self.pg1.remote_ip4, 60, 110)
2699 for client in clients:
2700 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2701 IP(src=client, dst=self.nat_addr) /
2702 TCP(sport=12346, dport=external_port))
2704 self.assertGreater(len(pkts), 0)
2705 self.pg1.add_stream(pkts)
2706 self.pg_enable_capture(self.pg_interfaces)
2708 capture = self.pg0.get_capture(len(pkts))
2710 if p[IP].dst == server1.ip4:
2712 elif p[IP].dst == server2.ip4:
2716 self.assertGreater(server1_n, 0)
2717 self.assertGreater(server2_n, 0)
2718 self.assertGreater(server3_n, 0)
2721 'addr': server2.ip4,
2727 # remove one back-end
2728 self.vapi.nat44_lb_static_mapping_add_del_local(
2730 external_addr=external_addr,
2731 external_port=external_port,
2733 protocol=IP_PROTOS.tcp)
2737 self.pg1.add_stream(pkts)
2738 self.pg_enable_capture(self.pg_interfaces)
2740 capture = self.pg0.get_capture(len(pkts))
2742 if p[IP].dst == server1.ip4:
2744 elif p[IP].dst == server2.ip4:
2748 self.assertGreater(server1_n, 0)
2749 self.assertEqual(server2_n, 0)
2750 self.assertGreater(server3_n, 0)
2752 def test_syslog_sess(self):
2753 """ NAT44ED Test syslog session creation and deletion """
2754 self.vapi.syslog_set_filter(
2755 self.syslog_severity.SYSLOG_API_SEVERITY_INFO)
2756 self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4)
2758 self.nat_add_address(self.nat_addr)
2759 self.nat_add_inside_interface(self.pg0)
2760 self.nat_add_outside_interface(self.pg1)
2762 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2763 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2764 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port))
2765 self.pg0.add_stream(p)
2766 self.pg_enable_capture(self.pg_interfaces)
2768 capture = self.pg1.get_capture(1)
2769 self.tcp_port_out = capture[0][TCP].sport
2770 capture = self.pg3.get_capture(1)
2771 self.verify_syslog_sess(capture[0][Raw].load)
2773 self.pg_enable_capture(self.pg_interfaces)
2775 self.nat_add_address(self.nat_addr, is_add=0)
2776 capture = self.pg3.get_capture(1)
2777 self.verify_syslog_sess(capture[0][Raw].load, False)
2779 def test_twice_nat_interface_addr(self):
2780 """ NAT44ED Acquire twice NAT addresses from interface """
2781 flags = self.config_flags.NAT_IS_TWICE_NAT
2782 self.vapi.nat44_add_del_interface_addr(
2783 sw_if_index=self.pg11.sw_if_index,
2784 flags=flags, is_add=1)
2786 # no address in NAT pool
2787 adresses = self.vapi.nat44_address_dump()
2788 self.assertEqual(0, len(adresses))
2790 # configure interface address and check NAT address pool
2791 self.pg11.config_ip4()
2792 adresses = self.vapi.nat44_address_dump()
2793 self.assertEqual(1, len(adresses))
2794 self.assertEqual(str(adresses[0].ip_address),
2795 self.pg11.local_ip4)
2796 self.assertEqual(adresses[0].flags, flags)
2798 # remove interface address and check NAT address pool
2799 self.pg11.unconfig_ip4()
2800 adresses = self.vapi.nat44_address_dump()
2801 self.assertEqual(0, len(adresses))
2803 def test_output_feature_stateful_acl(self):
2804 """ NAT44ED output feature works with stateful ACL """
2806 self.nat_add_address(self.nat_addr)
2807 self.vapi.nat44_interface_add_del_output_feature(
2808 sw_if_index=self.pg0.sw_if_index,
2809 flags=self.config_flags.NAT_IS_INSIDE, is_add=1)
2810 self.vapi.nat44_interface_add_del_output_feature(
2811 sw_if_index=self.pg1.sw_if_index,
2812 flags=self.config_flags.NAT_IS_OUTSIDE, is_add=1)
2814 # First ensure that the NAT is working sans ACL
2816 # send packets out2in, no sessions yet so packets should drop
2817 pkts_out2in = self.create_stream_out(self.pg1)
2818 self.send_and_assert_no_replies(self.pg1, pkts_out2in)
2820 # send packets into inside intf, ensure received via outside intf
2821 pkts_in2out = self.create_stream_in(self.pg0, self.pg1)
2822 capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1,
2824 self.verify_capture_out(capture, ignore_port=True)
2826 # send out2in again, with sessions created it should work now
2827 pkts_out2in = self.create_stream_out(self.pg1)
2828 capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0,
2830 self.verify_capture_in(capture, self.pg0)
2832 # Create an ACL blocking everything
2833 out2in_deny_rule = AclRule(is_permit=0)
2834 out2in_acl = VppAcl(self, rules=[out2in_deny_rule])
2835 out2in_acl.add_vpp_config()
2837 # create an ACL to permit/reflect everything
2838 in2out_reflect_rule = AclRule(is_permit=2)
2839 in2out_acl = VppAcl(self, rules=[in2out_reflect_rule])
2840 in2out_acl.add_vpp_config()
2842 # apply as input acl on interface and confirm it blocks everything
2843 acl_if = VppAclInterface(self, sw_if_index=self.pg1.sw_if_index,
2844 n_input=1, acls=[out2in_acl])
2845 acl_if.add_vpp_config()
2846 self.send_and_assert_no_replies(self.pg1, pkts_out2in)
2849 acl_if.acls = [out2in_acl, in2out_acl]
2850 acl_if.add_vpp_config()
2851 # send in2out to generate ACL state (NAT state was created earlier)
2852 capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1,
2854 self.verify_capture_out(capture, ignore_port=True)
2856 # send out2in again. ACL state exists so it should work now.
2857 # TCP packets with the syn flag set also need the ack flag
2858 for p in pkts_out2in:
2859 if p.haslayer(TCP) and p[TCP].flags & 0x02:
2860 p[TCP].flags |= 0x10
2861 capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0,
2863 self.verify_capture_in(capture, self.pg0)
2864 self.logger.info(self.vapi.cli("show trace"))
2866 def test_tcp_close(self):
2867 """ NAT44ED Close TCP session from inside network - output feature """
2868 old_timeouts = self.vapi.nat_get_timeouts()
2870 self.vapi.nat_set_timeouts(
2871 udp=old_timeouts.udp,
2872 tcp_established=old_timeouts.tcp_established,
2873 icmp=old_timeouts.icmp,
2874 tcp_transitory=new_transitory)
2876 self.vapi.nat44_forwarding_enable_disable(enable=1)
2877 self.nat_add_address(self.pg1.local_ip4)
2878 twice_nat_addr = '10.0.1.3'
2879 service_ip = '192.168.16.150'
2880 self.nat_add_address(twice_nat_addr, twice_nat=1)
2882 flags = self.config_flags.NAT_IS_INSIDE
2883 self.vapi.nat44_interface_add_del_feature(
2884 sw_if_index=self.pg0.sw_if_index,
2886 self.vapi.nat44_interface_add_del_feature(
2887 sw_if_index=self.pg0.sw_if_index,
2888 flags=flags, is_add=1)
2889 self.vapi.nat44_interface_add_del_output_feature(
2891 sw_if_index=self.pg1.sw_if_index)
2893 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
2894 self.config_flags.NAT_IS_TWICE_NAT)
2895 self.nat_add_static_mapping(self.pg0.remote_ip4,
2897 proto=IP_PROTOS.tcp,
2899 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
2900 start_sessnum = len(sessions)
2902 # SYN packet out->in
2903 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2904 IP(src=self.pg1.remote_ip4, dst=service_ip) /
2905 TCP(sport=33898, dport=80, flags="S"))
2906 self.pg1.add_stream(p)
2907 self.pg_enable_capture(self.pg_interfaces)
2909 capture = self.pg0.get_capture(1)
2911 tcp_port = p[TCP].sport
2913 # SYN + ACK packet in->out
2914 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2915 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
2916 TCP(sport=80, dport=tcp_port, flags="SA"))
2917 self.pg0.add_stream(p)
2918 self.pg_enable_capture(self.pg_interfaces)
2920 self.pg1.get_capture(1)
2922 # ACK packet out->in
2923 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2924 IP(src=self.pg1.remote_ip4, dst=service_ip) /
2925 TCP(sport=33898, dport=80, flags="A"))
2926 self.pg1.add_stream(p)
2927 self.pg_enable_capture(self.pg_interfaces)
2929 self.pg0.get_capture(1)
2931 # FIN packet in -> out
2932 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2933 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
2934 TCP(sport=80, dport=tcp_port, flags="FA", seq=100, ack=300))
2935 self.pg0.add_stream(p)
2936 self.pg_enable_capture(self.pg_interfaces)
2938 self.pg1.get_capture(1)
2940 # FIN+ACK packet out -> in
2941 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2942 IP(src=self.pg1.remote_ip4, dst=service_ip) /
2943 TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
2944 self.pg1.add_stream(p)
2945 self.pg_enable_capture(self.pg_interfaces)
2947 self.pg0.get_capture(1)
2949 # ACK packet in -> out
2950 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2951 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
2952 TCP(sport=80, dport=tcp_port, flags="A", seq=101, ack=301))
2953 self.pg0.add_stream(p)
2954 self.pg_enable_capture(self.pg_interfaces)
2956 self.pg1.get_capture(1)
2958 # session now in transitory timeout
2959 # try SYN packet out->in - should be dropped
2960 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2961 IP(src=self.pg1.remote_ip4, dst=service_ip) /
2962 TCP(sport=33898, dport=80, flags="S"))
2963 self.pg1.add_stream(p)
2964 self.pg_enable_capture(self.pg_interfaces)
2967 self.sleep(new_transitory, "wait for transitory timeout")
2968 self.pg0.assert_nothing_captured(0)
2970 # session should still exist
2971 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
2972 self.assertEqual(len(sessions) - start_sessnum, 1)
2974 # send FIN+ACK packet out -> in - will cause session to be wiped
2975 # but won't create a new session
2976 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2977 IP(src=self.pg1.remote_ip4, dst=service_ip) /
2978 TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
2979 self.pg1.add_stream(p)
2980 self.pg_enable_capture(self.pg_interfaces)
2983 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
2984 self.assertEqual(len(sessions) - start_sessnum, 0)
2985 self.pg0.assert_nothing_captured(0)
2987 def test_tcp_session_close_in(self):
2988 """ NAT44ED Close TCP session from inside network """
2990 in_port = self.tcp_port_in
2992 ext_port = self.tcp_external_port
2994 self.nat_add_address(self.nat_addr)
2995 self.nat_add_inside_interface(self.pg0)
2996 self.nat_add_outside_interface(self.pg1)
2997 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
2998 in_port, out_port, proto=IP_PROTOS.tcp,
2999 flags=self.config_flags.NAT_IS_TWICE_NAT)
3001 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3002 session_n = len(sessions)
3004 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3005 tcp_transitory=2, icmp=5)
3007 self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3009 # FIN packet in -> out
3010 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3011 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3012 TCP(sport=in_port, dport=ext_port,
3013 flags="FA", seq=100, ack=300))
3014 self.pg0.add_stream(p)
3015 self.pg_enable_capture(self.pg_interfaces)
3017 self.pg1.get_capture(1)
3021 # ACK packet out -> in
3022 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3023 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3024 TCP(sport=ext_port, dport=out_port,
3025 flags="A", seq=300, ack=101))
3028 # FIN packet out -> in
3029 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3030 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3031 TCP(sport=ext_port, dport=out_port,
3032 flags="FA", seq=300, ack=101))
3035 self.pg1.add_stream(pkts)
3036 self.pg_enable_capture(self.pg_interfaces)
3038 self.pg0.get_capture(2)
3040 # ACK packet in -> out
3041 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3042 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3043 TCP(sport=in_port, dport=ext_port,
3044 flags="A", seq=101, ack=301))
3045 self.pg0.add_stream(p)
3046 self.pg_enable_capture(self.pg_interfaces)
3048 self.pg1.get_capture(1)
3050 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3051 self.assertEqual(len(sessions) - session_n, 1)
3053 out2in_drops = self.get_err_counter(
3054 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3055 in2out_drops = self.get_err_counter(
3056 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3058 # extra FIN packet out -> in - this should be dropped
3059 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3060 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3061 TCP(sport=ext_port, dport=out_port,
3062 flags="FA", seq=300, ack=101))
3064 self.pg1.add_stream(p)
3065 self.pg_enable_capture(self.pg_interfaces)
3067 self.pg0.assert_nothing_captured()
3069 # extra ACK packet in -> out - this should be dropped
3070 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3071 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3072 TCP(sport=in_port, dport=ext_port,
3073 flags="A", seq=101, ack=301))
3074 self.pg0.add_stream(p)
3075 self.pg_enable_capture(self.pg_interfaces)
3077 self.pg1.assert_nothing_captured()
3079 stats = self.get_err_counter(
3080 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3081 self.assertEqual(stats - out2in_drops, 1)
3082 stats = self.get_err_counter(
3083 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3084 self.assertEqual(stats - in2out_drops, 1)
3087 # extra ACK packet in -> out - this will cause session to be wiped
3088 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3089 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3090 TCP(sport=in_port, dport=ext_port,
3091 flags="A", seq=101, ack=301))
3092 self.pg0.add_stream(p)
3093 self.pg_enable_capture(self.pg_interfaces)
3095 self.pg1.assert_nothing_captured()
3096 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3097 self.assertEqual(len(sessions) - session_n, 0)
3099 def test_tcp_session_close_out(self):
3100 """ NAT44ED Close TCP session from outside network """
3102 in_port = self.tcp_port_in
3104 ext_port = self.tcp_external_port
3106 self.nat_add_address(self.nat_addr)
3107 self.nat_add_inside_interface(self.pg0)
3108 self.nat_add_outside_interface(self.pg1)
3109 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3110 in_port, out_port, proto=IP_PROTOS.tcp,
3111 flags=self.config_flags.NAT_IS_TWICE_NAT)
3113 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3114 session_n = len(sessions)
3116 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3117 tcp_transitory=2, icmp=5)
3119 _ = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3121 # FIN packet out -> in
3122 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3123 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3124 TCP(sport=ext_port, dport=out_port,
3125 flags="FA", seq=100, ack=300))
3126 self.pg1.add_stream(p)
3127 self.pg_enable_capture(self.pg_interfaces)
3129 self.pg0.get_capture(1)
3131 # FIN+ACK packet in -> out
3132 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3133 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3134 TCP(sport=in_port, dport=ext_port,
3135 flags="FA", seq=300, ack=101))
3137 self.pg0.add_stream(p)
3138 self.pg_enable_capture(self.pg_interfaces)
3140 self.pg1.get_capture(1)
3142 # ACK packet out -> in
3143 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3144 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3145 TCP(sport=ext_port, dport=out_port,
3146 flags="A", seq=101, ack=301))
3147 self.pg1.add_stream(p)
3148 self.pg_enable_capture(self.pg_interfaces)
3150 self.pg0.get_capture(1)
3152 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3153 self.assertEqual(len(sessions) - session_n, 1)
3155 out2in_drops = self.get_err_counter(
3156 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3157 in2out_drops = self.get_err_counter(
3158 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3160 # extra FIN packet out -> in - this should be dropped
3161 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3162 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3163 TCP(sport=ext_port, dport=out_port,
3164 flags="FA", seq=300, ack=101))
3166 self.pg1.add_stream(p)
3167 self.pg_enable_capture(self.pg_interfaces)
3169 self.pg0.assert_nothing_captured()
3171 # extra ACK packet in -> out - this should be dropped
3172 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3173 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3174 TCP(sport=in_port, dport=ext_port,
3175 flags="A", seq=101, ack=301))
3176 self.pg0.add_stream(p)
3177 self.pg_enable_capture(self.pg_interfaces)
3179 self.pg1.assert_nothing_captured()
3181 stats = self.get_err_counter(
3182 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3183 self.assertEqual(stats - out2in_drops, 1)
3184 stats = self.get_err_counter(
3185 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3186 self.assertEqual(stats - in2out_drops, 1)
3189 # extra ACK packet in -> out - this will cause session to be wiped
3190 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3191 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3192 TCP(sport=in_port, dport=ext_port,
3193 flags="A", seq=101, ack=301))
3194 self.pg0.add_stream(p)
3195 self.pg_enable_capture(self.pg_interfaces)
3197 self.pg1.assert_nothing_captured()
3198 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3199 self.assertEqual(len(sessions) - session_n, 0)
3201 def test_tcp_session_close_simultaneous(self):
3202 """ NAT44ED Close TCP session from inside network """
3204 in_port = self.tcp_port_in
3207 self.nat_add_address(self.nat_addr)
3208 self.nat_add_inside_interface(self.pg0)
3209 self.nat_add_outside_interface(self.pg1)
3210 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3211 in_port, ext_port, proto=IP_PROTOS.tcp,
3212 flags=self.config_flags.NAT_IS_TWICE_NAT)
3214 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3215 session_n = len(sessions)
3217 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3218 tcp_transitory=2, icmp=5)
3220 out_port = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3222 # FIN packet in -> out
3223 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3224 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3225 TCP(sport=in_port, dport=ext_port,
3226 flags="FA", seq=100, ack=300))
3227 self.pg0.add_stream(p)
3228 self.pg_enable_capture(self.pg_interfaces)
3230 self.pg1.get_capture(1)
3232 # FIN packet out -> in
3233 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3234 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3235 TCP(sport=ext_port, dport=out_port,
3236 flags="FA", seq=300, ack=100))
3237 self.pg1.add_stream(p)
3238 self.pg_enable_capture(self.pg_interfaces)
3240 self.pg0.get_capture(1)
3242 # ACK packet in -> out
3243 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3244 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3245 TCP(sport=in_port, dport=ext_port,
3246 flags="A", seq=101, ack=301))
3247 self.pg0.add_stream(p)
3248 self.pg_enable_capture(self.pg_interfaces)
3250 self.pg1.get_capture(1)
3252 # ACK packet out -> in
3253 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3254 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3255 TCP(sport=ext_port, dport=out_port,
3256 flags="A", seq=301, ack=101))
3257 self.pg1.add_stream(p)
3258 self.pg_enable_capture(self.pg_interfaces)
3260 self.pg0.get_capture(1)
3262 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3263 self.assertEqual(len(sessions) - session_n, 1)
3265 out2in_drops = self.get_err_counter(
3266 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3267 in2out_drops = self.get_err_counter(
3268 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3270 # extra FIN packet out -> in - this should be dropped
3271 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3272 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3273 TCP(sport=ext_port, dport=out_port,
3274 flags="FA", seq=300, ack=101))
3276 self.pg1.add_stream(p)
3277 self.pg_enable_capture(self.pg_interfaces)
3279 self.pg0.assert_nothing_captured()
3281 # extra ACK packet in -> out - this should be dropped
3282 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3283 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3284 TCP(sport=in_port, dport=ext_port,
3285 flags="A", seq=101, ack=301))
3286 self.pg0.add_stream(p)
3287 self.pg_enable_capture(self.pg_interfaces)
3289 self.pg1.assert_nothing_captured()
3291 stats = self.get_err_counter(
3292 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3293 self.assertEqual(stats - out2in_drops, 1)
3294 stats = self.get_err_counter(
3295 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3296 self.assertEqual(stats - in2out_drops, 1)
3299 # extra ACK packet in -> out - this will cause session to be wiped
3300 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3301 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3302 TCP(sport=in_port, dport=ext_port,
3303 flags="A", seq=101, ack=301))
3304 self.pg0.add_stream(p)
3305 self.pg_enable_capture(self.pg_interfaces)
3307 self.pg1.assert_nothing_captured()
3308 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3309 self.assertEqual(len(sessions) - session_n, 0)
3311 def test_dynamic_output_feature_vrf(self):
3312 """ NAT44ED dynamic translation test: output-feature, VRF"""
3314 # other then default (0)
3317 self.nat_add_address(self.nat_addr)
3318 flags = self.config_flags.NAT_IS_INSIDE
3319 self.vapi.nat44_interface_add_del_output_feature(
3320 sw_if_index=self.pg7.sw_if_index,
3321 flags=flags, is_add=1)
3322 self.vapi.nat44_interface_add_del_output_feature(
3323 sw_if_index=self.pg8.sw_if_index,
3327 self.configure_ip4_interface(self.pg7, table_id=new_vrf_id)
3328 self.configure_ip4_interface(self.pg8, table_id=new_vrf_id)
3331 tcpn = self.get_stats_counter(
3332 '/nat44/ed/in2out/slowpath/tcp')
3333 udpn = self.get_stats_counter(
3334 '/nat44/ed/in2out/slowpath/udp')
3335 icmpn = self.get_stats_counter(
3336 '/nat44/ed/in2out/slowpath/icmp')
3337 drops = self.get_stats_counter(
3338 '/nat44/ed/in2out/slowpath/drops')
3340 pkts = self.create_stream_in(self.pg7, self.pg8)
3341 self.pg7.add_stream(pkts)
3342 self.pg_enable_capture(self.pg_interfaces)
3344 capture = self.pg8.get_capture(len(pkts))
3345 self.verify_capture_out(capture, ignore_port=True)
3347 if_idx = self.pg7.sw_if_index
3348 cnt = self.get_stats_counter(
3349 '/nat44/ed/in2out/slowpath/tcp')
3350 self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2)
3351 cnt = self.get_stats_counter(
3352 '/nat44/ed/in2out/slowpath/udp')
3353 self.assertEqual(cnt[if_idx] - udpn[if_idx], 1)
3354 cnt = self.get_stats_counter(
3355 '/nat44/ed/in2out/slowpath/icmp')
3356 self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1)
3357 cnt = self.get_stats_counter(
3358 '/nat44/ed/in2out/slowpath/drops')
3359 self.assertEqual(cnt[if_idx] - drops[if_idx], 0)
3362 tcpn = self.get_stats_counter(
3363 '/nat44/ed/out2in/fastpath/tcp')
3364 udpn = self.get_stats_counter(
3365 '/nat44/ed/out2in/fastpath/udp')
3366 icmpn = self.get_stats_counter(
3367 '/nat44/ed/out2in/fastpath/icmp')
3368 drops = self.get_stats_counter(
3369 '/nat44/ed/out2in/fastpath/drops')
3371 pkts = self.create_stream_out(self.pg8)
3372 self.pg8.add_stream(pkts)
3373 self.pg_enable_capture(self.pg_interfaces)
3375 capture = self.pg7.get_capture(len(pkts))
3376 self.verify_capture_in(capture, self.pg7)
3378 if_idx = self.pg8.sw_if_index
3379 cnt = self.get_stats_counter(
3380 '/nat44/ed/out2in/fastpath/tcp')
3381 self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2)
3382 cnt = self.get_stats_counter(
3383 '/nat44/ed/out2in/fastpath/udp')
3384 self.assertEqual(cnt[if_idx] - udpn[if_idx], 1)
3385 cnt = self.get_stats_counter(
3386 '/nat44/ed/out2in/fastpath/icmp')
3387 self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1)
3388 cnt = self.get_stats_counter(
3389 '/nat44/ed/out2in/fastpath/drops')
3390 self.assertEqual(cnt[if_idx] - drops[if_idx], 0)
3392 sessions = self.get_stats_counter('/nat44/total-sessions')
3393 self.assertEqual(sessions[0], 3)
3396 self.configure_ip4_interface(self.pg7, table_id=0)
3397 self.configure_ip4_interface(self.pg8, table_id=0)
3399 self.vapi.ip_table_add_del(is_add=0,
3400 table={'table_id': new_vrf_id})
3402 def test_next_src_nat(self):
3403 """ NAT44ED On way back forward packet to nat44-in2out node. """
3405 twice_nat_addr = '10.0.1.3'
3408 post_twice_nat_port = 0
3410 self.vapi.nat44_forwarding_enable_disable(enable=1)
3411 self.nat_add_address(twice_nat_addr, twice_nat=1)
3412 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3413 self.config_flags.NAT_IS_SELF_TWICE_NAT)
3414 self.nat_add_static_mapping(self.pg6.remote_ip4, self.pg1.remote_ip4,
3415 local_port, external_port,
3416 proto=IP_PROTOS.tcp, vrf_id=1,
3418 self.vapi.nat44_interface_add_del_feature(
3419 sw_if_index=self.pg6.sw_if_index,
3422 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
3423 IP(src=self.pg6.remote_ip4, dst=self.pg1.remote_ip4) /
3424 TCP(sport=12345, dport=external_port))
3425 self.pg6.add_stream(p)
3426 self.pg_enable_capture(self.pg_interfaces)
3428 capture = self.pg6.get_capture(1)
3433 self.assertEqual(ip.src, twice_nat_addr)
3434 self.assertNotEqual(tcp.sport, 12345)
3435 post_twice_nat_port = tcp.sport
3436 self.assertEqual(ip.dst, self.pg6.remote_ip4)
3437 self.assertEqual(tcp.dport, local_port)
3438 self.assert_packet_checksums_valid(p)
3440 self.logger.error(ppp("Unexpected or invalid packet:", p))
3443 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
3444 IP(src=self.pg6.remote_ip4, dst=twice_nat_addr) /
3445 TCP(sport=local_port, dport=post_twice_nat_port))
3446 self.pg6.add_stream(p)
3447 self.pg_enable_capture(self.pg_interfaces)
3449 capture = self.pg6.get_capture(1)
3454 self.assertEqual(ip.src, self.pg1.remote_ip4)
3455 self.assertEqual(tcp.sport, external_port)
3456 self.assertEqual(ip.dst, self.pg6.remote_ip4)
3457 self.assertEqual(tcp.dport, 12345)
3458 self.assert_packet_checksums_valid(p)
3460 self.logger.error(ppp("Unexpected or invalid packet:", p))
3463 def test_one_armed_nat44_static(self):
3464 """ NAT44ED One armed NAT and 1:1 NAPT asymmetrical rule """
3466 remote_host = self.pg4.remote_hosts[0]
3467 local_host = self.pg4.remote_hosts[1]
3472 self.vapi.nat44_forwarding_enable_disable(enable=1)
3473 self.nat_add_address(self.nat_addr, twice_nat=1)
3474 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3475 self.config_flags.NAT_IS_TWICE_NAT)
3476 self.nat_add_static_mapping(local_host.ip4, self.nat_addr,
3477 local_port, external_port,
3478 proto=IP_PROTOS.tcp, flags=flags)
3479 flags = self.config_flags.NAT_IS_INSIDE
3480 self.vapi.nat44_interface_add_del_feature(
3481 sw_if_index=self.pg4.sw_if_index,
3483 self.vapi.nat44_interface_add_del_feature(
3484 sw_if_index=self.pg4.sw_if_index,
3485 flags=flags, is_add=1)
3487 # from client to service
3488 p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
3489 IP(src=remote_host.ip4, dst=self.nat_addr) /
3490 TCP(sport=12345, dport=external_port))
3491 self.pg4.add_stream(p)
3492 self.pg_enable_capture(self.pg_interfaces)
3494 capture = self.pg4.get_capture(1)
3499 self.assertEqual(ip.dst, local_host.ip4)
3500 self.assertEqual(ip.src, self.nat_addr)
3501 self.assertEqual(tcp.dport, local_port)
3502 self.assertNotEqual(tcp.sport, 12345)
3503 eh_port_in = tcp.sport
3504 self.assert_packet_checksums_valid(p)
3506 self.logger.error(ppp("Unexpected or invalid packet:", p))
3509 # from service back to client
3510 p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
3511 IP(src=local_host.ip4, dst=self.nat_addr) /
3512 TCP(sport=local_port, dport=eh_port_in))
3513 self.pg4.add_stream(p)
3514 self.pg_enable_capture(self.pg_interfaces)
3516 capture = self.pg4.get_capture(1)
3521 self.assertEqual(ip.src, self.nat_addr)
3522 self.assertEqual(ip.dst, remote_host.ip4)
3523 self.assertEqual(tcp.sport, external_port)
3524 self.assertEqual(tcp.dport, 12345)
3525 self.assert_packet_checksums_valid(p)
3527 self.logger.error(ppp("Unexpected or invalid packet:", p))
3531 if __name__ == '__main__':
3532 unittest.main(testRunner=VppTestRunner)