5 from random import randint, choice
8 from framework import VppTestCase, VppTestRunner
9 from scapy.data import IP_PROTOS
10 from scapy.layers.inet import IP, TCP, UDP, ICMP, GRE
11 from scapy.layers.inet import IPerror, TCPerror
12 from scapy.layers.l2 import Ether
13 from scapy.packet import Raw
14 from syslog_rfc5424_parser import SyslogMessage, ParseError
15 from syslog_rfc5424_parser.constants import SyslogSeverity
16 from util import ppp, ip4_range
17 from vpp_acl import AclRule, VppAcl, VppAclInterface
18 from vpp_ip_route import VppIpRoute, VppRoutePath
19 from vpp_papi import VppEnum
20 from util import StatsDiff
23 class TestNAT44ED(VppTestCase):
24 """ NAT44ED Test Case """
26 nat_addr = '10.0.10.3'
37 tcp_external_port = 80
50 def plugin_enable(self):
51 self.vapi.nat44_ed_plugin_enable_disable(
52 sessions=self.max_sessions, enable=1)
54 def plugin_disable(self):
55 self.vapi.nat44_ed_plugin_enable_disable(enable=0)
58 def config_flags(self):
59 return VppEnum.vl_api_nat_config_flags_t
62 def nat44_config_flags(self):
63 return VppEnum.vl_api_nat44_config_flags_t
66 def syslog_severity(self):
67 return VppEnum.vl_api_syslog_severity_t
70 def server_addr(self):
71 return self.pg1.remote_hosts[0].ip4
75 return randint(1025, 65535)
78 def proto2layer(proto):
79 if proto == IP_PROTOS.tcp:
81 elif proto == IP_PROTOS.udp:
83 elif proto == IP_PROTOS.icmp:
86 raise Exception("Unsupported protocol")
89 def create_and_add_ip4_table(cls, i, table_id=0):
90 cls.vapi.ip_table_add_del(is_add=1, table={'table_id': table_id})
91 i.set_table_ip4(table_id)
94 def configure_ip4_interface(cls, i, hosts=0, table_id=None):
96 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,
153 cls.create_pg_interfaces(range(12))
154 cls.interfaces = list(cls.pg_interfaces[:4])
156 cls.create_and_add_ip4_table(cls.pg2, 10)
158 for i in cls.interfaces:
159 cls.configure_ip4_interface(i, hosts=3)
161 # test specific (test-multiple-vrf)
162 cls.vapi.ip_table_add_del(is_add=1, table={'table_id': 1})
164 # test specific (test-one-armed-nat44-static)
165 cls.pg4.generate_remote_hosts(2)
167 cls.vapi.sw_interface_add_del_address(
168 sw_if_index=cls.pg4.sw_if_index,
169 prefix="10.0.0.1/24")
171 cls.pg4.resolve_arp()
172 cls.pg4._remote_hosts[1]._ip4 = cls.pg4._remote_hosts[0]._ip4
173 cls.pg4.resolve_arp()
175 # test specific interface (pg5)
176 cls.pg5._local_ip4 = "10.1.1.1"
177 cls.pg5._remote_hosts[0]._ip4 = "10.1.1.2"
178 cls.pg5.set_table_ip4(1)
181 cls.pg5.resolve_arp()
183 # test specific interface (pg6)
184 cls.pg6._local_ip4 = "10.1.2.1"
185 cls.pg6._remote_hosts[0]._ip4 = "10.1.2.2"
186 cls.pg6.set_table_ip4(1)
189 cls.pg6.resolve_arp()
193 rl.append(VppIpRoute(cls, "0.0.0.0", 0,
194 [VppRoutePath("0.0.0.0", 0xffffffff,
196 register=False, table_id=1))
197 rl.append(VppIpRoute(cls, "0.0.0.0", 0,
198 [VppRoutePath(cls.pg1.local_ip4,
199 cls.pg1.sw_if_index)],
201 rl.append(VppIpRoute(cls, cls.pg5.remote_ip4, 32,
202 [VppRoutePath("0.0.0.0",
203 cls.pg5.sw_if_index)],
204 register=False, table_id=1))
205 rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 32,
206 [VppRoutePath("0.0.0.0",
207 cls.pg6.sw_if_index)],
208 register=False, table_id=1))
209 rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 16,
210 [VppRoutePath("0.0.0.0", 0xffffffff,
212 register=False, table_id=0))
217 cls.no_diff = StatsDiff({
219 '/nat44-ed/in2out/fastpath/tcp': 0,
220 '/nat44-ed/in2out/fastpath/udp': 0,
221 '/nat44-ed/in2out/fastpath/icmp': 0,
222 '/nat44-ed/in2out/fastpath/drops': 0,
223 '/nat44-ed/in2out/slowpath/tcp': 0,
224 '/nat44-ed/in2out/slowpath/udp': 0,
225 '/nat44-ed/in2out/slowpath/icmp': 0,
226 '/nat44-ed/in2out/slowpath/drops': 0,
227 '/nat44-ed/in2out/fastpath/tcp': 0,
228 '/nat44-ed/in2out/fastpath/udp': 0,
229 '/nat44-ed/in2out/fastpath/icmp': 0,
230 '/nat44-ed/in2out/fastpath/drops': 0,
231 '/nat44-ed/in2out/slowpath/tcp': 0,
232 '/nat44-ed/in2out/slowpath/udp': 0,
233 '/nat44-ed/in2out/slowpath/icmp': 0,
234 '/nat44-ed/in2out/slowpath/drops': 0,
236 for pg in cls.pg_interfaces
239 def get_err_counter(self, path):
240 return self.statistics.get_err_counter(path)
242 def reass_hairpinning(self, server_addr, server_in_port, server_out_port,
243 host_in_port, proto=IP_PROTOS.tcp,
245 layer = self.proto2layer(proto)
247 if proto == IP_PROTOS.tcp:
248 data = b"A" * 4 + b"B" * 16 + b"C" * 3
250 data = b"A" * 16 + b"B" * 16 + b"C" * 3
252 # send packet from host to server
253 pkts = self.create_stream_frag(self.pg0,
259 self.pg0.add_stream(pkts)
260 self.pg_enable_capture(self.pg_interfaces)
262 frags = self.pg0.get_capture(len(pkts))
263 p = self.reass_frags_and_verify(frags,
266 if proto != IP_PROTOS.icmp:
268 self.assertNotEqual(p[layer].sport, host_in_port)
269 self.assertEqual(p[layer].dport, server_in_port)
272 self.assertNotEqual(p[layer].id, host_in_port)
273 self.assertEqual(data, p[Raw].load)
275 def frag_out_of_order(self, proto=IP_PROTOS.tcp, dont_translate=False,
277 layer = self.proto2layer(proto)
279 if proto == IP_PROTOS.tcp:
280 data = b"A" * 4 + b"B" * 16 + b"C" * 3
282 data = b"A" * 16 + b"B" * 16 + b"C" * 3
283 self.port_in = self.random_port()
287 pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4,
288 self.port_in, 20, data, proto)
290 self.pg0.add_stream(pkts)
291 self.pg_enable_capture(self.pg_interfaces)
293 frags = self.pg1.get_capture(len(pkts))
294 if not dont_translate:
295 p = self.reass_frags_and_verify(frags,
299 p = self.reass_frags_and_verify(frags,
302 if proto != IP_PROTOS.icmp:
303 if not dont_translate:
304 self.assertEqual(p[layer].dport, 20)
306 self.assertNotEqual(p[layer].sport, self.port_in)
308 self.assertEqual(p[layer].sport, self.port_in)
311 if not dont_translate:
312 self.assertNotEqual(p[layer].id, self.port_in)
314 self.assertEqual(p[layer].id, self.port_in)
315 self.assertEqual(data, p[Raw].load)
318 if not dont_translate:
319 dst_addr = self.nat_addr
321 dst_addr = self.pg0.remote_ip4
322 if proto != IP_PROTOS.icmp:
324 dport = p[layer].sport
328 pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport,
329 data, proto, echo_reply=True)
331 self.pg1.add_stream(pkts)
332 self.pg_enable_capture(self.pg_interfaces)
333 self.logger.info(self.vapi.cli("show trace"))
335 frags = self.pg0.get_capture(len(pkts))
336 p = self.reass_frags_and_verify(frags,
339 if proto != IP_PROTOS.icmp:
340 self.assertEqual(p[layer].sport, 20)
341 self.assertEqual(p[layer].dport, self.port_in)
343 self.assertEqual(p[layer].id, self.port_in)
344 self.assertEqual(data, p[Raw].load)
346 def reass_frags_and_verify(self, frags, src, dst):
349 self.assertEqual(p[IP].src, src)
350 self.assertEqual(p[IP].dst, dst)
351 self.assert_ip_checksum_valid(p)
352 buffer.seek(p[IP].frag * 8)
353 buffer.write(bytes(p[IP].payload))
354 ip = IP(src=frags[0][IP].src, dst=frags[0][IP].dst,
355 proto=frags[0][IP].proto)
356 if ip.proto == IP_PROTOS.tcp:
357 p = (ip / TCP(buffer.getvalue()))
358 self.logger.debug(ppp("Reassembled:", p))
359 self.assert_tcp_checksum_valid(p)
360 elif ip.proto == IP_PROTOS.udp:
361 p = (ip / UDP(buffer.getvalue()[:8]) /
362 Raw(buffer.getvalue()[8:]))
363 elif ip.proto == IP_PROTOS.icmp:
364 p = (ip / ICMP(buffer.getvalue()))
367 def frag_in_order(self, proto=IP_PROTOS.tcp, dont_translate=False,
369 layer = self.proto2layer(proto)
371 if proto == IP_PROTOS.tcp:
372 data = b"A" * 4 + b"B" * 16 + b"C" * 3
374 data = b"A" * 16 + b"B" * 16 + b"C" * 3
375 self.port_in = self.random_port()
378 pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4,
379 self.port_in, 20, data, proto)
380 self.pg0.add_stream(pkts)
381 self.pg_enable_capture(self.pg_interfaces)
383 frags = self.pg1.get_capture(len(pkts))
384 if not dont_translate:
385 p = self.reass_frags_and_verify(frags,
389 p = self.reass_frags_and_verify(frags,
392 if proto != IP_PROTOS.icmp:
393 if not dont_translate:
394 self.assertEqual(p[layer].dport, 20)
396 self.assertNotEqual(p[layer].sport, self.port_in)
398 self.assertEqual(p[layer].sport, self.port_in)
401 if not dont_translate:
402 self.assertNotEqual(p[layer].id, self.port_in)
404 self.assertEqual(p[layer].id, self.port_in)
405 self.assertEqual(data, p[Raw].load)
408 if not dont_translate:
409 dst_addr = self.nat_addr
411 dst_addr = self.pg0.remote_ip4
412 if proto != IP_PROTOS.icmp:
414 dport = p[layer].sport
418 pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport, data,
419 proto, echo_reply=True)
420 self.pg1.add_stream(pkts)
421 self.pg_enable_capture(self.pg_interfaces)
423 frags = self.pg0.get_capture(len(pkts))
424 p = self.reass_frags_and_verify(frags,
427 if proto != IP_PROTOS.icmp:
428 self.assertEqual(p[layer].sport, 20)
429 self.assertEqual(p[layer].dport, self.port_in)
431 self.assertEqual(p[layer].id, self.port_in)
432 self.assertEqual(data, p[Raw].load)
434 def verify_capture_out(self, capture, nat_ip=None, same_port=False,
435 dst_ip=None, ignore_port=False):
437 nat_ip = self.nat_addr
438 for packet in capture:
440 self.assert_packet_checksums_valid(packet)
441 self.assertEqual(packet[IP].src, nat_ip)
442 if dst_ip is not None:
443 self.assertEqual(packet[IP].dst, dst_ip)
444 if packet.haslayer(TCP):
448 packet[TCP].sport, self.tcp_port_in)
451 packet[TCP].sport, self.tcp_port_in)
452 self.tcp_port_out = packet[TCP].sport
453 self.assert_packet_checksums_valid(packet)
454 elif packet.haslayer(UDP):
458 packet[UDP].sport, self.udp_port_in)
461 packet[UDP].sport, self.udp_port_in)
462 self.udp_port_out = packet[UDP].sport
467 packet[ICMP].id, self.icmp_id_in)
470 packet[ICMP].id, self.icmp_id_in)
471 self.icmp_id_out = packet[ICMP].id
472 self.assert_packet_checksums_valid(packet)
474 self.logger.error(ppp("Unexpected or invalid packet "
475 "(outside network):", packet))
478 def verify_capture_in(self, capture, in_if):
479 for packet in capture:
481 self.assert_packet_checksums_valid(packet)
482 self.assertEqual(packet[IP].dst, in_if.remote_ip4)
483 if packet.haslayer(TCP):
484 self.assertEqual(packet[TCP].dport, self.tcp_port_in)
485 elif packet.haslayer(UDP):
486 self.assertEqual(packet[UDP].dport, self.udp_port_in)
488 self.assertEqual(packet[ICMP].id, self.icmp_id_in)
490 self.logger.error(ppp("Unexpected or invalid packet "
491 "(inside network):", packet))
494 def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64):
496 dst_ip = out_if.remote_ip4
500 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
501 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
502 TCP(sport=self.tcp_port_in, dport=20))
506 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
507 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
508 UDP(sport=self.udp_port_in, dport=20))
512 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
513 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
514 ICMP(id=self.icmp_id_in, type='echo-request'))
519 def create_stream_out(self, out_if, dst_ip=None, ttl=64,
520 use_inside_ports=False):
522 dst_ip = self.nat_addr
523 if not use_inside_ports:
524 tcp_port = self.tcp_port_out
525 udp_port = self.udp_port_out
526 icmp_id = self.icmp_id_out
528 tcp_port = self.tcp_port_in
529 udp_port = self.udp_port_in
530 icmp_id = self.icmp_id_in
533 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
534 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
535 TCP(dport=tcp_port, sport=20))
539 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
540 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
541 UDP(dport=udp_port, sport=20))
545 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
546 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
547 ICMP(id=icmp_id, type='echo-reply'))
552 def create_tcp_stream(self, in_if, out_if, count):
556 for i in range(count):
557 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
558 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=64) /
559 TCP(sport=port + i, dport=20))
564 def create_stream_frag(self, src_if, dst, sport, dport, data,
565 proto=IP_PROTOS.tcp, echo_reply=False):
566 if proto == IP_PROTOS.tcp:
567 p = (IP(src=src_if.remote_ip4, dst=dst) /
568 TCP(sport=sport, dport=dport) /
570 p = p.__class__(scapy.compat.raw(p))
571 chksum = p[TCP].chksum
572 proto_header = TCP(sport=sport, dport=dport, chksum=chksum)
573 elif proto == IP_PROTOS.udp:
574 proto_header = UDP(sport=sport, dport=dport)
575 elif proto == IP_PROTOS.icmp:
577 proto_header = ICMP(id=sport, type='echo-request')
579 proto_header = ICMP(id=sport, type='echo-reply')
581 raise Exception("Unsupported protocol")
582 id = self.random_port()
584 if proto == IP_PROTOS.tcp:
587 raw = Raw(data[0:16])
588 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
589 IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=0, id=id) /
593 if proto == IP_PROTOS.tcp:
594 raw = Raw(data[4:20])
596 raw = Raw(data[16:32])
597 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
598 IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=3, id=id,
602 if proto == IP_PROTOS.tcp:
606 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
607 IP(src=src_if.remote_ip4, dst=dst, frag=5, proto=proto,
613 def frag_in_order_in_plus_out(self, in_addr, out_addr, in_port, out_port,
614 proto=IP_PROTOS.tcp):
616 layer = self.proto2layer(proto)
618 if proto == IP_PROTOS.tcp:
619 data = b"A" * 4 + b"B" * 16 + b"C" * 3
621 data = b"A" * 16 + b"B" * 16 + b"C" * 3
622 port_in = self.random_port()
626 pkts = self.create_stream_frag(self.pg0, out_addr,
629 self.pg0.add_stream(pkts)
630 self.pg_enable_capture(self.pg_interfaces)
632 frags = self.pg1.get_capture(len(pkts))
633 p = self.reass_frags_and_verify(frags,
636 if proto != IP_PROTOS.icmp:
637 self.assertEqual(p[layer].sport, port_in)
638 self.assertEqual(p[layer].dport, in_port)
640 self.assertEqual(p[layer].id, port_in)
641 self.assertEqual(data, p[Raw].load)
644 if proto != IP_PROTOS.icmp:
645 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
647 p[layer].sport, data, proto)
649 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
650 p[layer].id, 0, data, proto,
652 self.pg1.add_stream(pkts)
653 self.pg_enable_capture(self.pg_interfaces)
655 frags = self.pg0.get_capture(len(pkts))
656 p = self.reass_frags_and_verify(frags,
659 if proto != IP_PROTOS.icmp:
660 self.assertEqual(p[layer].sport, out_port)
661 self.assertEqual(p[layer].dport, port_in)
663 self.assertEqual(p[layer].id, port_in)
664 self.assertEqual(data, p[Raw].load)
666 def frag_out_of_order_in_plus_out(self, in_addr, out_addr, in_port,
667 out_port, proto=IP_PROTOS.tcp):
669 layer = self.proto2layer(proto)
671 if proto == IP_PROTOS.tcp:
672 data = b"A" * 4 + b"B" * 16 + b"C" * 3
674 data = b"A" * 16 + b"B" * 16 + b"C" * 3
675 port_in = self.random_port()
679 pkts = self.create_stream_frag(self.pg0, out_addr,
683 self.pg0.add_stream(pkts)
684 self.pg_enable_capture(self.pg_interfaces)
686 frags = self.pg1.get_capture(len(pkts))
687 p = self.reass_frags_and_verify(frags,
690 if proto != IP_PROTOS.icmp:
691 self.assertEqual(p[layer].dport, in_port)
692 self.assertEqual(p[layer].sport, port_in)
693 self.assertEqual(p[layer].dport, in_port)
695 self.assertEqual(p[layer].id, port_in)
696 self.assertEqual(data, p[Raw].load)
699 if proto != IP_PROTOS.icmp:
700 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
702 p[layer].sport, data, proto)
704 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
705 p[layer].id, 0, data, proto,
708 self.pg1.add_stream(pkts)
709 self.pg_enable_capture(self.pg_interfaces)
711 frags = self.pg0.get_capture(len(pkts))
712 p = self.reass_frags_and_verify(frags,
715 if proto != IP_PROTOS.icmp:
716 self.assertEqual(p[layer].sport, out_port)
717 self.assertEqual(p[layer].dport, port_in)
719 self.assertEqual(p[layer].id, port_in)
720 self.assertEqual(data, p[Raw].load)
722 def init_tcp_session(self, in_if, out_if, in_port, ext_port):
724 p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
725 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
726 TCP(sport=in_port, dport=ext_port, flags="S"))
728 self.pg_enable_capture(self.pg_interfaces)
730 capture = out_if.get_capture(1)
732 out_port = p[TCP].sport
734 # SYN + ACK packet out->in
735 p = (Ether(src=out_if.remote_mac, dst=out_if.local_mac) /
736 IP(src=out_if.remote_ip4, dst=self.nat_addr) /
737 TCP(sport=ext_port, dport=out_port, flags="SA"))
739 self.pg_enable_capture(self.pg_interfaces)
744 p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
745 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
746 TCP(sport=in_port, dport=ext_port, flags="A"))
748 self.pg_enable_capture(self.pg_interfaces)
750 out_if.get_capture(1)
754 def twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False,
756 twice_nat_addr = '10.0.1.3'
764 port_in1 = port_in + 1
765 port_in2 = port_in + 2
770 server1 = self.pg0.remote_hosts[0]
771 server2 = self.pg0.remote_hosts[1]
783 eh_translate = ((not self_twice_nat) or (not lb and same_pg) or
786 self.nat_add_address(self.nat_addr)
787 self.nat_add_address(twice_nat_addr, twice_nat=1)
791 flags |= self.config_flags.NAT_IS_SELF_TWICE_NAT
793 flags |= self.config_flags.NAT_IS_TWICE_NAT
796 self.nat_add_static_mapping(pg0.remote_ip4, self.nat_addr,
801 locals = [{'addr': server1.ip4,
805 {'addr': server2.ip4,
809 out_addr = self.nat_addr
811 self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags,
812 external_addr=out_addr,
813 external_port=port_out,
814 protocol=IP_PROTOS.tcp,
815 local_num=len(locals),
817 self.nat_add_inside_interface(pg0)
818 self.nat_add_outside_interface(pg1)
824 assert client_id is not None
826 client = self.pg0.remote_hosts[0]
828 client = self.pg0.remote_hosts[1]
830 client = pg1.remote_hosts[0]
831 p = (Ether(src=pg1.remote_mac, dst=pg1.local_mac) /
832 IP(src=client.ip4, dst=self.nat_addr) /
833 TCP(sport=eh_port_out, dport=port_out))
835 self.pg_enable_capture(self.pg_interfaces)
837 capture = pg0.get_capture(1)
843 if ip.dst == server1.ip4:
849 self.assertEqual(ip.dst, server.ip4)
851 self.assertIn(tcp.dport, [port_in1, port_in2])
853 self.assertEqual(tcp.dport, port_in)
855 self.assertEqual(ip.src, twice_nat_addr)
856 self.assertNotEqual(tcp.sport, eh_port_out)
858 self.assertEqual(ip.src, client.ip4)
859 self.assertEqual(tcp.sport, eh_port_out)
861 eh_port_in = tcp.sport
862 saved_port_in = tcp.dport
863 self.assert_packet_checksums_valid(p)
865 self.logger.error(ppp("Unexpected or invalid packet:", p))
868 p = (Ether(src=server.mac, dst=pg0.local_mac) /
869 IP(src=server.ip4, dst=eh_addr_in) /
870 TCP(sport=saved_port_in, dport=eh_port_in))
872 self.pg_enable_capture(self.pg_interfaces)
874 capture = pg1.get_capture(1)
879 self.assertEqual(ip.dst, client.ip4)
880 self.assertEqual(ip.src, self.nat_addr)
881 self.assertEqual(tcp.dport, eh_port_out)
882 self.assertEqual(tcp.sport, port_out)
883 self.assert_packet_checksums_valid(p)
885 self.logger.error(ppp("Unexpected or invalid packet:", p))
889 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
890 self.assertEqual(len(sessions), 1)
891 self.assertTrue(sessions[0].flags &
892 self.config_flags.NAT_IS_EXT_HOST_VALID)
893 self.assertTrue(sessions[0].flags &
894 self.config_flags.NAT_IS_TWICE_NAT)
895 self.logger.info(self.vapi.cli("show nat44 sessions"))
896 self.vapi.nat44_del_session(
897 address=sessions[0].inside_ip_address,
898 port=sessions[0].inside_port,
899 protocol=sessions[0].protocol,
900 flags=(self.config_flags.NAT_IS_INSIDE |
901 self.config_flags.NAT_IS_EXT_HOST_VALID),
902 ext_host_address=sessions[0].ext_host_nat_address,
903 ext_host_port=sessions[0].ext_host_nat_port)
904 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
905 self.assertEqual(len(sessions), 0)
907 def verify_syslog_sess(self, data, msgid, is_ip6=False):
908 message = data.decode('utf-8')
910 message = SyslogMessage.parse(message)
911 except ParseError as e:
915 self.assertEqual(message.severity, SyslogSeverity.info)
916 self.assertEqual(message.appname, 'NAT')
917 self.assertEqual(message.msgid, msgid)
918 sd_params = message.sd.get('nsess')
919 self.assertTrue(sd_params is not None)
921 self.assertEqual(sd_params.get('IATYP'), 'IPv6')
922 self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip6)
924 self.assertEqual(sd_params.get('IATYP'), 'IPv4')
925 self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4)
926 self.assertTrue(sd_params.get('SSUBIX') is not None)
927 self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in)
928 self.assertEqual(sd_params.get('XATYP'), 'IPv4')
929 self.assertEqual(sd_params.get('XSADDR'), self.nat_addr)
930 self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out)
931 self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp)
932 self.assertEqual(sd_params.get('SVLAN'), '0')
933 self.assertEqual(sd_params.get('XDADDR'), self.pg1.remote_ip4)
934 self.assertEqual(sd_params.get('XDPORT'),
935 "%d" % self.tcp_external_port)
937 def test_icmp_error(self):
938 """ NAT44ED test ICMP error message with inner header"""
942 self.nat_add_address(self.nat_addr)
943 self.nat_add_inside_interface(self.pg0)
944 self.nat_add_outside_interface(self.pg1)
946 # in2out (initiate connection)
947 p1 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
948 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
949 UDP(sport=21, dport=20) / payload)
951 self.pg0.add_stream(p1)
952 self.pg_enable_capture(self.pg_interfaces)
954 capture = self.pg1.get_capture(1)[0]
956 # out2in (send error message)
957 p2 = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
958 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
959 ICMP(type='dest-unreach', code='port-unreachable') /
962 self.pg1.add_stream(p2)
963 self.pg_enable_capture(self.pg_interfaces)
966 capture = self.pg0.get_capture(1)[0]
968 self.logger.info(ppp("p1 packet:", p1))
969 self.logger.info(ppp("p2 packet:", p2))
970 self.logger.info(ppp("capture packet:", capture))
972 def test_icmp_echo_reply_trailer(self):
973 """ ICMP echo reply with ethernet trailer"""
975 self.nat_add_address(self.nat_addr)
976 self.nat_add_inside_interface(self.pg0)
977 self.nat_add_outside_interface(self.pg1)
980 p1 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
981 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
982 ICMP(type=8, id=0xabcd, seq=0))
984 self.pg0.add_stream(p1)
985 self.pg_enable_capture(self.pg_interfaces)
987 c = self.pg1.get_capture(1)[0]
989 self.logger.debug(self.vapi.cli("show trace"))
992 p2 = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
993 IP(src=self.pg1.remote_ip4, dst=self.nat_addr, id=0xee59) /
994 ICMP(type=0, id=c[ICMP].id, seq=0))
996 # force checksum calculation
997 p2 = p2.__class__(bytes(p2))
999 self.logger.debug(ppp("Packet before modification:", p2))
1001 # hex representation of vss monitoring ethernet trailer
1002 # this seems to be just added to end of packet without modifying
1003 # IP or ICMP lengths / checksums
1004 p2 = p2 / Raw("\x00\x00\x52\x54\x00\x46\xab\x04\x84\x18")
1005 # change it so that IP/ICMP is unaffected
1008 self.logger.debug(ppp("Packet with added trailer:", p2))
1010 self.pg1.add_stream(p2)
1011 self.pg_enable_capture(self.pg_interfaces)
1014 self.pg0.get_capture(1)
1016 def test_users_dump(self):
1017 """ NAT44ED API test - nat44_user_dump """
1019 self.nat_add_address(self.nat_addr)
1020 self.nat_add_inside_interface(self.pg0)
1021 self.nat_add_outside_interface(self.pg1)
1023 self.vapi.nat44_forwarding_enable_disable(enable=1)
1025 local_ip = self.pg0.remote_ip4
1026 external_ip = self.nat_addr
1027 self.nat_add_static_mapping(local_ip, external_ip)
1029 users = self.vapi.nat44_user_dump()
1030 self.assertEqual(len(users), 0)
1032 # in2out - static mapping match
1034 pkts = self.create_stream_out(self.pg1)
1035 self.pg1.add_stream(pkts)
1036 self.pg_enable_capture(self.pg_interfaces)
1038 capture = self.pg0.get_capture(len(pkts))
1039 self.verify_capture_in(capture, self.pg0)
1041 pkts = self.create_stream_in(self.pg0, self.pg1)
1042 self.pg0.add_stream(pkts)
1043 self.pg_enable_capture(self.pg_interfaces)
1045 capture = self.pg1.get_capture(len(pkts))
1046 self.verify_capture_out(capture, same_port=True)
1048 users = self.vapi.nat44_user_dump()
1049 self.assertEqual(len(users), 1)
1050 static_user = users[0]
1051 self.assertEqual(static_user.nstaticsessions, 3)
1052 self.assertEqual(static_user.nsessions, 0)
1054 # in2out - no static mapping match (forwarding test)
1056 host0 = self.pg0.remote_hosts[0]
1057 self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
1059 pkts = self.create_stream_out(self.pg1,
1060 dst_ip=self.pg0.remote_ip4,
1061 use_inside_ports=True)
1062 self.pg1.add_stream(pkts)
1063 self.pg_enable_capture(self.pg_interfaces)
1065 capture = self.pg0.get_capture(len(pkts))
1066 self.verify_capture_in(capture, self.pg0)
1068 pkts = self.create_stream_in(self.pg0, self.pg1)
1069 self.pg0.add_stream(pkts)
1070 self.pg_enable_capture(self.pg_interfaces)
1072 capture = self.pg1.get_capture(len(pkts))
1073 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1076 self.pg0.remote_hosts[0] = host0
1078 users = self.vapi.nat44_user_dump()
1079 self.assertEqual(len(users), 2)
1080 if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4:
1081 non_static_user = users[1]
1082 static_user = users[0]
1084 non_static_user = users[0]
1085 static_user = users[1]
1086 self.assertEqual(static_user.nstaticsessions, 3)
1087 self.assertEqual(static_user.nsessions, 0)
1088 self.assertEqual(non_static_user.nstaticsessions, 0)
1089 self.assertEqual(non_static_user.nsessions, 3)
1091 users = self.vapi.nat44_user_dump()
1092 self.assertEqual(len(users), 2)
1093 if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4:
1094 non_static_user = users[1]
1095 static_user = users[0]
1097 non_static_user = users[0]
1098 static_user = users[1]
1099 self.assertEqual(static_user.nstaticsessions, 3)
1100 self.assertEqual(static_user.nsessions, 0)
1101 self.assertEqual(non_static_user.nstaticsessions, 0)
1102 self.assertEqual(non_static_user.nsessions, 3)
1104 def test_frag_out_of_order_do_not_translate(self):
1105 """ NAT44ED don't translate fragments arriving out of order """
1106 self.nat_add_inside_interface(self.pg0)
1107 self.nat_add_outside_interface(self.pg1)
1108 self.vapi.nat44_forwarding_enable_disable(enable=True)
1109 self.frag_out_of_order(proto=IP_PROTOS.tcp, dont_translate=True)
1111 def test_forwarding(self):
1112 """ NAT44ED forwarding test """
1114 self.nat_add_inside_interface(self.pg0)
1115 self.nat_add_outside_interface(self.pg1)
1116 self.vapi.nat44_forwarding_enable_disable(enable=1)
1118 real_ip = self.pg0.remote_ip4
1119 alias_ip = self.nat_addr
1120 flags = self.config_flags.NAT_IS_ADDR_ONLY
1121 self.vapi.nat44_add_del_static_mapping(is_add=1,
1122 local_ip_address=real_ip,
1123 external_ip_address=alias_ip,
1124 external_sw_if_index=0xFFFFFFFF,
1128 # in2out - static mapping match
1130 pkts = self.create_stream_out(self.pg1)
1131 self.pg1.add_stream(pkts)
1132 self.pg_enable_capture(self.pg_interfaces)
1134 capture = self.pg0.get_capture(len(pkts))
1135 self.verify_capture_in(capture, self.pg0)
1137 pkts = self.create_stream_in(self.pg0, self.pg1)
1138 self.pg0.add_stream(pkts)
1139 self.pg_enable_capture(self.pg_interfaces)
1141 capture = self.pg1.get_capture(len(pkts))
1142 self.verify_capture_out(capture, same_port=True)
1144 # in2out - no static mapping match
1146 host0 = self.pg0.remote_hosts[0]
1147 self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
1149 pkts = self.create_stream_out(self.pg1,
1150 dst_ip=self.pg0.remote_ip4,
1151 use_inside_ports=True)
1152 self.pg1.add_stream(pkts)
1153 self.pg_enable_capture(self.pg_interfaces)
1155 capture = self.pg0.get_capture(len(pkts))
1156 self.verify_capture_in(capture, self.pg0)
1158 pkts = self.create_stream_in(self.pg0, self.pg1)
1159 self.pg0.add_stream(pkts)
1160 self.pg_enable_capture(self.pg_interfaces)
1162 capture = self.pg1.get_capture(len(pkts))
1163 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1166 self.pg0.remote_hosts[0] = host0
1168 user = self.pg0.remote_hosts[1]
1169 sessions = self.vapi.nat44_user_session_dump(user.ip4, 0)
1170 self.assertEqual(len(sessions), 3)
1171 self.assertTrue(sessions[0].flags &
1172 self.config_flags.NAT_IS_EXT_HOST_VALID)
1173 self.vapi.nat44_del_session(
1174 address=sessions[0].inside_ip_address,
1175 port=sessions[0].inside_port,
1176 protocol=sessions[0].protocol,
1177 flags=(self.config_flags.NAT_IS_INSIDE |
1178 self.config_flags.NAT_IS_EXT_HOST_VALID),
1179 ext_host_address=sessions[0].ext_host_address,
1180 ext_host_port=sessions[0].ext_host_port)
1181 sessions = self.vapi.nat44_user_session_dump(user.ip4, 0)
1182 self.assertEqual(len(sessions), 2)
1185 self.vapi.nat44_forwarding_enable_disable(enable=0)
1186 flags = self.config_flags.NAT_IS_ADDR_ONLY
1187 self.vapi.nat44_add_del_static_mapping(
1189 local_ip_address=real_ip,
1190 external_ip_address=alias_ip,
1191 external_sw_if_index=0xFFFFFFFF,
1194 def test_output_feature_and_service2(self):
1195 """ NAT44ED interface output feature and service host direct access """
1196 self.vapi.nat44_forwarding_enable_disable(enable=1)
1197 self.nat_add_address(self.nat_addr)
1199 self.vapi.nat44_interface_add_del_output_feature(
1200 sw_if_index=self.pg1.sw_if_index, is_add=1,)
1202 # session initiated from service host - translate
1203 pkts = self.create_stream_in(self.pg0, self.pg1)
1204 self.pg0.add_stream(pkts)
1205 self.pg_enable_capture(self.pg_interfaces)
1207 capture = self.pg1.get_capture(len(pkts))
1208 self.verify_capture_out(capture, ignore_port=True)
1210 pkts = self.create_stream_out(self.pg1)
1211 self.pg1.add_stream(pkts)
1212 self.pg_enable_capture(self.pg_interfaces)
1214 capture = self.pg0.get_capture(len(pkts))
1215 self.verify_capture_in(capture, self.pg0)
1217 # session initiated from remote host - do not translate
1218 tcp_port_in = self.tcp_port_in
1219 udp_port_in = self.udp_port_in
1220 icmp_id_in = self.icmp_id_in
1222 self.tcp_port_in = 60303
1223 self.udp_port_in = 60304
1224 self.icmp_id_in = 60305
1227 pkts = self.create_stream_out(self.pg1,
1228 self.pg0.remote_ip4,
1229 use_inside_ports=True)
1230 self.pg1.add_stream(pkts)
1231 self.pg_enable_capture(self.pg_interfaces)
1233 capture = self.pg0.get_capture(len(pkts))
1234 self.verify_capture_in(capture, self.pg0)
1236 pkts = self.create_stream_in(self.pg0, self.pg1)
1237 self.pg0.add_stream(pkts)
1238 self.pg_enable_capture(self.pg_interfaces)
1240 capture = self.pg1.get_capture(len(pkts))
1241 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1244 self.tcp_port_in = tcp_port_in
1245 self.udp_port_in = udp_port_in
1246 self.icmp_id_in = icmp_id_in
1248 def test_twice_nat(self):
1249 """ NAT44ED Twice NAT """
1250 self.twice_nat_common()
1252 def test_self_twice_nat_positive(self):
1253 """ NAT44ED Self Twice NAT (positive test) """
1254 self.twice_nat_common(self_twice_nat=True, same_pg=True)
1256 def test_self_twice_nat_lb_positive(self):
1257 """ NAT44ED Self Twice NAT local service load balancing (positive test)
1259 self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True,
1262 def test_twice_nat_lb(self):
1263 """ NAT44ED Twice NAT local service load balancing """
1264 self.twice_nat_common(lb=True)
1266 def test_output_feature(self):
1267 """ NAT44ED interface output feature (in2out postrouting) """
1268 self.vapi.nat44_forwarding_enable_disable(enable=1)
1269 self.nat_add_address(self.nat_addr)
1271 self.nat_add_outside_interface(self.pg0)
1272 self.vapi.nat44_interface_add_del_output_feature(
1273 sw_if_index=self.pg1.sw_if_index, is_add=1)
1276 pkts = self.create_stream_in(self.pg0, self.pg1)
1277 self.pg0.add_stream(pkts)
1278 self.pg_enable_capture(self.pg_interfaces)
1280 capture = self.pg1.get_capture(len(pkts))
1281 self.verify_capture_out(capture, ignore_port=True)
1282 self.logger.debug(self.vapi.cli("show trace"))
1285 pkts = self.create_stream_out(self.pg1)
1286 self.pg1.add_stream(pkts)
1287 self.pg_enable_capture(self.pg_interfaces)
1289 capture = self.pg0.get_capture(len(pkts))
1290 self.verify_capture_in(capture, self.pg0)
1291 self.logger.debug(self.vapi.cli("show trace"))
1294 pkts = self.create_stream_in(self.pg0, self.pg1, ttl=2)
1295 self.pg0.add_stream(pkts)
1296 self.pg_enable_capture(self.pg_interfaces)
1298 capture = self.pg1.get_capture(len(pkts))
1299 self.verify_capture_out(capture, ignore_port=True)
1300 self.logger.debug(self.vapi.cli("show trace"))
1303 pkts = self.create_stream_out(self.pg1, ttl=2)
1304 self.pg1.add_stream(pkts)
1305 self.pg_enable_capture(self.pg_interfaces)
1307 capture = self.pg0.get_capture(len(pkts))
1308 self.verify_capture_in(capture, self.pg0)
1309 self.logger.debug(self.vapi.cli("show trace"))
1312 pkts = self.create_stream_in(self.pg0, self.pg1, ttl=1)
1313 capture = self.send_and_expect_some(self.pg0, pkts, self.pg0)
1315 self.assertIn(ICMP, p)
1316 self.assertEqual(p[ICMP].type, 11) # 11 == time-exceeded
1318 def test_static_with_port_out2(self):
1319 """ NAT44ED 1:1 NAPT asymmetrical rule """
1324 self.vapi.nat44_forwarding_enable_disable(enable=1)
1325 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1326 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
1327 local_port, external_port,
1328 proto=IP_PROTOS.tcp, flags=flags)
1330 self.nat_add_inside_interface(self.pg0)
1331 self.nat_add_outside_interface(self.pg1)
1333 # from client to service
1334 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1335 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1336 TCP(sport=12345, dport=external_port))
1337 self.pg1.add_stream(p)
1338 self.pg_enable_capture(self.pg_interfaces)
1340 capture = self.pg0.get_capture(1)
1345 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1346 self.assertEqual(tcp.dport, local_port)
1347 self.assert_packet_checksums_valid(p)
1349 self.logger.error(ppp("Unexpected or invalid packet:", p))
1353 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
1354 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1355 ICMP(type=11) / capture[0][IP])
1356 self.pg0.add_stream(p)
1357 self.pg_enable_capture(self.pg_interfaces)
1359 capture = self.pg1.get_capture(1)
1362 self.assertEqual(p[IP].src, self.nat_addr)
1364 self.assertEqual(inner.dst, self.nat_addr)
1365 self.assertEqual(inner[TCPerror].dport, external_port)
1367 self.logger.error(ppp("Unexpected or invalid packet:", p))
1370 # from service back to client
1371 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1372 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1373 TCP(sport=local_port, dport=12345))
1374 self.pg0.add_stream(p)
1375 self.pg_enable_capture(self.pg_interfaces)
1377 capture = self.pg1.get_capture(1)
1382 self.assertEqual(ip.src, self.nat_addr)
1383 self.assertEqual(tcp.sport, external_port)
1384 self.assert_packet_checksums_valid(p)
1386 self.logger.error(ppp("Unexpected or invalid packet:", p))
1390 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1391 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1392 ICMP(type=11) / capture[0][IP])
1393 self.pg1.add_stream(p)
1394 self.pg_enable_capture(self.pg_interfaces)
1396 capture = self.pg0.get_capture(1)
1399 self.assertEqual(p[IP].dst, self.pg0.remote_ip4)
1401 self.assertEqual(inner.src, self.pg0.remote_ip4)
1402 self.assertEqual(inner[TCPerror].sport, local_port)
1404 self.logger.error(ppp("Unexpected or invalid packet:", p))
1407 # from client to server (no translation)
1408 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1409 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
1410 TCP(sport=12346, dport=local_port))
1411 self.pg1.add_stream(p)
1412 self.pg_enable_capture(self.pg_interfaces)
1414 capture = self.pg0.get_capture(1)
1419 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1420 self.assertEqual(tcp.dport, local_port)
1421 self.assert_packet_checksums_valid(p)
1423 self.logger.error(ppp("Unexpected or invalid packet:", p))
1426 # from service back to client (no translation)
1427 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1428 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1429 TCP(sport=local_port, dport=12346))
1430 self.pg0.add_stream(p)
1431 self.pg_enable_capture(self.pg_interfaces)
1433 capture = self.pg1.get_capture(1)
1438 self.assertEqual(ip.src, self.pg0.remote_ip4)
1439 self.assertEqual(tcp.sport, local_port)
1440 self.assert_packet_checksums_valid(p)
1442 self.logger.error(ppp("Unexpected or invalid packet:", p))
1445 def test_static_lb(self):
1446 """ NAT44ED local service load balancing """
1447 external_addr_n = self.nat_addr
1450 server1 = self.pg0.remote_hosts[0]
1451 server2 = self.pg0.remote_hosts[1]
1453 locals = [{'addr': server1.ip4,
1457 {'addr': server2.ip4,
1462 self.nat_add_address(self.nat_addr)
1463 self.vapi.nat44_add_del_lb_static_mapping(
1465 external_addr=external_addr_n,
1466 external_port=external_port,
1467 protocol=IP_PROTOS.tcp,
1468 local_num=len(locals),
1470 flags = self.config_flags.NAT_IS_INSIDE
1471 self.vapi.nat44_interface_add_del_feature(
1472 sw_if_index=self.pg0.sw_if_index,
1473 flags=flags, is_add=1)
1474 self.vapi.nat44_interface_add_del_feature(
1475 sw_if_index=self.pg1.sw_if_index,
1478 # from client to service
1479 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1480 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1481 TCP(sport=12345, dport=external_port))
1482 self.pg1.add_stream(p)
1483 self.pg_enable_capture(self.pg_interfaces)
1485 capture = self.pg0.get_capture(1)
1491 self.assertIn(ip.dst, [server1.ip4, server2.ip4])
1492 if ip.dst == server1.ip4:
1496 self.assertEqual(tcp.dport, local_port)
1497 self.assert_packet_checksums_valid(p)
1499 self.logger.error(ppp("Unexpected or invalid packet:", p))
1502 # from service back to client
1503 p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
1504 IP(src=server.ip4, dst=self.pg1.remote_ip4) /
1505 TCP(sport=local_port, dport=12345))
1506 self.pg0.add_stream(p)
1507 self.pg_enable_capture(self.pg_interfaces)
1509 capture = self.pg1.get_capture(1)
1514 self.assertEqual(ip.src, self.nat_addr)
1515 self.assertEqual(tcp.sport, external_port)
1516 self.assert_packet_checksums_valid(p)
1518 self.logger.error(ppp("Unexpected or invalid packet:", p))
1521 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
1522 self.assertEqual(len(sessions), 1)
1523 self.assertTrue(sessions[0].flags &
1524 self.config_flags.NAT_IS_EXT_HOST_VALID)
1525 self.vapi.nat44_del_session(
1526 address=sessions[0].inside_ip_address,
1527 port=sessions[0].inside_port,
1528 protocol=sessions[0].protocol,
1529 flags=(self.config_flags.NAT_IS_INSIDE |
1530 self.config_flags.NAT_IS_EXT_HOST_VALID),
1531 ext_host_address=sessions[0].ext_host_address,
1532 ext_host_port=sessions[0].ext_host_port)
1533 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
1534 self.assertEqual(len(sessions), 0)
1536 def test_static_lb_2(self):
1537 """ NAT44ED local service load balancing (asymmetrical rule) """
1538 external_addr = self.nat_addr
1541 server1 = self.pg0.remote_hosts[0]
1542 server2 = self.pg0.remote_hosts[1]
1544 locals = [{'addr': server1.ip4,
1548 {'addr': server2.ip4,
1553 self.vapi.nat44_forwarding_enable_disable(enable=1)
1554 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1555 self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags,
1556 external_addr=external_addr,
1557 external_port=external_port,
1558 protocol=IP_PROTOS.tcp,
1559 local_num=len(locals),
1561 flags = self.config_flags.NAT_IS_INSIDE
1562 self.vapi.nat44_interface_add_del_feature(
1563 sw_if_index=self.pg0.sw_if_index,
1564 flags=flags, is_add=1)
1565 self.vapi.nat44_interface_add_del_feature(
1566 sw_if_index=self.pg1.sw_if_index,
1569 # from client to service
1570 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1571 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1572 TCP(sport=12345, dport=external_port))
1573 self.pg1.add_stream(p)
1574 self.pg_enable_capture(self.pg_interfaces)
1576 capture = self.pg0.get_capture(1)
1582 self.assertIn(ip.dst, [server1.ip4, server2.ip4])
1583 if ip.dst == server1.ip4:
1587 self.assertEqual(tcp.dport, local_port)
1588 self.assert_packet_checksums_valid(p)
1590 self.logger.error(ppp("Unexpected or invalid packet:", p))
1593 # from service back to client
1594 p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
1595 IP(src=server.ip4, dst=self.pg1.remote_ip4) /
1596 TCP(sport=local_port, dport=12345))
1597 self.pg0.add_stream(p)
1598 self.pg_enable_capture(self.pg_interfaces)
1600 capture = self.pg1.get_capture(1)
1605 self.assertEqual(ip.src, self.nat_addr)
1606 self.assertEqual(tcp.sport, external_port)
1607 self.assert_packet_checksums_valid(p)
1609 self.logger.error(ppp("Unexpected or invalid packet:", p))
1612 # from client to server (no translation)
1613 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1614 IP(src=self.pg1.remote_ip4, dst=server1.ip4) /
1615 TCP(sport=12346, dport=local_port))
1616 self.pg1.add_stream(p)
1617 self.pg_enable_capture(self.pg_interfaces)
1619 capture = self.pg0.get_capture(1)
1625 self.assertEqual(ip.dst, server1.ip4)
1626 self.assertEqual(tcp.dport, local_port)
1627 self.assert_packet_checksums_valid(p)
1629 self.logger.error(ppp("Unexpected or invalid packet:", p))
1632 # from service back to client (no translation)
1633 p = (Ether(src=server1.mac, dst=self.pg0.local_mac) /
1634 IP(src=server1.ip4, dst=self.pg1.remote_ip4) /
1635 TCP(sport=local_port, dport=12346))
1636 self.pg0.add_stream(p)
1637 self.pg_enable_capture(self.pg_interfaces)
1639 capture = self.pg1.get_capture(1)
1644 self.assertEqual(ip.src, server1.ip4)
1645 self.assertEqual(tcp.sport, local_port)
1646 self.assert_packet_checksums_valid(p)
1648 self.logger.error(ppp("Unexpected or invalid packet:", p))
1651 def test_lb_affinity(self):
1652 """ NAT44ED local service load balancing affinity """
1653 external_addr = self.nat_addr
1656 server1 = self.pg0.remote_hosts[0]
1657 server2 = self.pg0.remote_hosts[1]
1659 locals = [{'addr': server1.ip4,
1663 {'addr': server2.ip4,
1668 self.nat_add_address(self.nat_addr)
1669 self.vapi.nat44_add_del_lb_static_mapping(is_add=1,
1670 external_addr=external_addr,
1671 external_port=external_port,
1672 protocol=IP_PROTOS.tcp,
1674 local_num=len(locals),
1676 flags = self.config_flags.NAT_IS_INSIDE
1677 self.vapi.nat44_interface_add_del_feature(
1678 sw_if_index=self.pg0.sw_if_index,
1679 flags=flags, is_add=1)
1680 self.vapi.nat44_interface_add_del_feature(
1681 sw_if_index=self.pg1.sw_if_index,
1684 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1685 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1686 TCP(sport=1025, dport=external_port))
1687 self.pg1.add_stream(p)
1688 self.pg_enable_capture(self.pg_interfaces)
1690 capture = self.pg0.get_capture(1)
1691 backend = capture[0][IP].dst
1693 sessions = self.vapi.nat44_user_session_dump(backend, 0)
1694 self.assertEqual(len(sessions), 1)
1695 self.assertTrue(sessions[0].flags &
1696 self.config_flags.NAT_IS_EXT_HOST_VALID)
1697 self.vapi.nat44_del_session(
1698 address=sessions[0].inside_ip_address,
1699 port=sessions[0].inside_port,
1700 protocol=sessions[0].protocol,
1701 flags=(self.config_flags.NAT_IS_INSIDE |
1702 self.config_flags.NAT_IS_EXT_HOST_VALID),
1703 ext_host_address=sessions[0].ext_host_address,
1704 ext_host_port=sessions[0].ext_host_port)
1707 for port in range(1030, 1100):
1708 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1709 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1710 TCP(sport=port, dport=external_port))
1712 self.pg1.add_stream(pkts)
1713 self.pg_enable_capture(self.pg_interfaces)
1715 capture = self.pg0.get_capture(len(pkts))
1717 self.assertEqual(p[IP].dst, backend)
1719 def test_multiple_vrf_1(self):
1720 """ Multiple VRF - both client & service in VRF1 """
1722 external_addr = '1.2.3.4'
1727 flags = self.config_flags.NAT_IS_INSIDE
1728 self.vapi.nat44_interface_add_del_feature(
1729 sw_if_index=self.pg5.sw_if_index,
1731 self.vapi.nat44_interface_add_del_feature(
1732 sw_if_index=self.pg5.sw_if_index,
1733 is_add=1, flags=flags)
1734 self.vapi.nat44_interface_add_del_feature(
1735 sw_if_index=self.pg6.sw_if_index,
1737 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1738 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1739 local_port, external_port, vrf_id=1,
1740 proto=IP_PROTOS.tcp, flags=flags)
1742 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1743 IP(src=self.pg6.remote_ip4, dst=external_addr) /
1744 TCP(sport=12345, dport=external_port))
1745 self.pg6.add_stream(p)
1746 self.pg_enable_capture(self.pg_interfaces)
1748 capture = self.pg5.get_capture(1)
1753 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1754 self.assertEqual(tcp.dport, local_port)
1755 self.assert_packet_checksums_valid(p)
1757 self.logger.error(ppp("Unexpected or invalid packet:", p))
1760 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1761 IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) /
1762 TCP(sport=local_port, dport=12345))
1763 self.pg5.add_stream(p)
1764 self.pg_enable_capture(self.pg_interfaces)
1766 capture = self.pg6.get_capture(1)
1771 self.assertEqual(ip.src, external_addr)
1772 self.assertEqual(tcp.sport, external_port)
1773 self.assert_packet_checksums_valid(p)
1775 self.logger.error(ppp("Unexpected or invalid packet:", p))
1778 def test_multiple_vrf_2(self):
1779 """ Multiple VRF - dynamic NAT from VRF1 to VRF0 (output-feature) """
1781 external_addr = '1.2.3.4'
1786 self.nat_add_address(self.nat_addr)
1787 flags = self.config_flags.NAT_IS_INSIDE
1788 self.vapi.nat44_interface_add_del_output_feature(
1789 sw_if_index=self.pg1.sw_if_index,
1791 self.vapi.nat44_interface_add_del_feature(
1792 sw_if_index=self.pg5.sw_if_index,
1794 self.vapi.nat44_interface_add_del_feature(
1795 sw_if_index=self.pg5.sw_if_index,
1796 is_add=1, flags=flags)
1797 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1798 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1799 local_port, external_port, vrf_id=1,
1800 proto=IP_PROTOS.tcp, flags=flags)
1802 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1803 IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) /
1804 TCP(sport=2345, dport=22))
1805 self.pg5.add_stream(p)
1806 self.pg_enable_capture(self.pg_interfaces)
1808 capture = self.pg1.get_capture(1)
1813 self.assertEqual(ip.src, self.nat_addr)
1814 self.assert_packet_checksums_valid(p)
1817 self.logger.error(ppp("Unexpected or invalid packet:", p))
1820 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1821 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1822 TCP(sport=22, dport=port))
1823 self.pg1.add_stream(p)
1824 self.pg_enable_capture(self.pg_interfaces)
1826 capture = self.pg5.get_capture(1)
1831 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1832 self.assertEqual(tcp.dport, 2345)
1833 self.assert_packet_checksums_valid(p)
1835 self.logger.error(ppp("Unexpected or invalid packet:", p))
1838 def test_multiple_vrf_3(self):
1839 """ Multiple VRF - client in VRF1, service in VRF0 """
1841 external_addr = '1.2.3.4'
1846 flags = self.config_flags.NAT_IS_INSIDE
1847 self.vapi.nat44_interface_add_del_feature(
1848 sw_if_index=self.pg0.sw_if_index,
1850 self.vapi.nat44_interface_add_del_feature(
1851 sw_if_index=self.pg0.sw_if_index,
1852 is_add=1, flags=flags)
1853 self.vapi.nat44_interface_add_del_feature(
1854 sw_if_index=self.pg6.sw_if_index,
1856 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1857 self.nat_add_static_mapping(
1858 self.pg0.remote_ip4,
1859 external_sw_if_index=self.pg0.sw_if_index,
1860 local_port=local_port,
1862 external_port=external_port,
1863 proto=IP_PROTOS.tcp,
1867 # from client VRF1 to service VRF0
1868 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1869 IP(src=self.pg6.remote_ip4, dst=self.pg0.local_ip4) /
1870 TCP(sport=12346, dport=external_port))
1871 self.pg6.add_stream(p)
1872 self.pg_enable_capture(self.pg_interfaces)
1874 capture = self.pg0.get_capture(1)
1879 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1880 self.assertEqual(tcp.dport, local_port)
1881 self.assert_packet_checksums_valid(p)
1883 self.logger.error(ppp("Unexpected or invalid packet:", p))
1886 # from service VRF0 back to client VRF1
1887 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1888 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1889 TCP(sport=local_port, dport=12346))
1890 self.pg0.add_stream(p)
1891 self.pg_enable_capture(self.pg_interfaces)
1893 capture = self.pg6.get_capture(1)
1898 self.assertEqual(ip.src, self.pg0.local_ip4)
1899 self.assertEqual(tcp.sport, external_port)
1900 self.assert_packet_checksums_valid(p)
1902 self.logger.error(ppp("Unexpected or invalid packet:", p))
1905 def test_multiple_vrf_4(self):
1906 """ Multiple VRF - client in VRF0, service in VRF1 """
1908 external_addr = '1.2.3.4'
1913 flags = self.config_flags.NAT_IS_INSIDE
1914 self.vapi.nat44_interface_add_del_feature(
1915 sw_if_index=self.pg0.sw_if_index,
1917 self.vapi.nat44_interface_add_del_feature(
1918 sw_if_index=self.pg0.sw_if_index,
1919 is_add=1, flags=flags)
1920 self.vapi.nat44_interface_add_del_feature(
1921 sw_if_index=self.pg5.sw_if_index,
1923 self.vapi.nat44_interface_add_del_feature(
1924 sw_if_index=self.pg5.sw_if_index,
1925 is_add=1, flags=flags)
1926 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1927 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1928 local_port, external_port, vrf_id=1,
1929 proto=IP_PROTOS.tcp, flags=flags)
1931 # from client VRF0 to service VRF1
1932 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1933 IP(src=self.pg0.remote_ip4, dst=external_addr) /
1934 TCP(sport=12347, dport=external_port))
1935 self.pg0.add_stream(p)
1936 self.pg_enable_capture(self.pg_interfaces)
1938 capture = self.pg5.get_capture(1)
1943 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1944 self.assertEqual(tcp.dport, local_port)
1945 self.assert_packet_checksums_valid(p)
1947 self.logger.error(ppp("Unexpected or invalid packet:", p))
1950 # from service VRF1 back to client VRF0
1951 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1952 IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) /
1953 TCP(sport=local_port, dport=12347))
1954 self.pg5.add_stream(p)
1955 self.pg_enable_capture(self.pg_interfaces)
1957 capture = self.pg0.get_capture(1)
1962 self.assertEqual(ip.src, external_addr)
1963 self.assertEqual(tcp.sport, external_port)
1964 self.assert_packet_checksums_valid(p)
1966 self.logger.error(ppp("Unexpected or invalid packet:", p))
1969 def test_multiple_vrf_5(self):
1970 """ Multiple VRF - forwarding - no translation """
1972 external_addr = '1.2.3.4'
1977 self.vapi.nat44_forwarding_enable_disable(enable=1)
1978 flags = self.config_flags.NAT_IS_INSIDE
1979 self.vapi.nat44_interface_add_del_feature(
1980 sw_if_index=self.pg0.sw_if_index,
1982 self.vapi.nat44_interface_add_del_feature(
1983 sw_if_index=self.pg0.sw_if_index,
1984 is_add=1, flags=flags)
1985 self.vapi.nat44_interface_add_del_feature(
1986 sw_if_index=self.pg5.sw_if_index,
1988 self.vapi.nat44_interface_add_del_feature(
1989 sw_if_index=self.pg5.sw_if_index,
1990 is_add=1, flags=flags)
1991 self.vapi.nat44_interface_add_del_feature(
1992 sw_if_index=self.pg6.sw_if_index,
1994 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1995 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1996 local_port, external_port, vrf_id=1,
1997 proto=IP_PROTOS.tcp, flags=flags)
1998 self.nat_add_static_mapping(
1999 self.pg0.remote_ip4,
2000 external_sw_if_index=self.pg0.sw_if_index,
2001 local_port=local_port,
2003 external_port=external_port,
2004 proto=IP_PROTOS.tcp,
2008 # from client to server (both VRF1, no translation)
2009 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
2010 IP(src=self.pg6.remote_ip4, dst=self.pg5.remote_ip4) /
2011 TCP(sport=12348, dport=local_port))
2012 self.pg6.add_stream(p)
2013 self.pg_enable_capture(self.pg_interfaces)
2015 capture = self.pg5.get_capture(1)
2020 self.assertEqual(ip.dst, self.pg5.remote_ip4)
2021 self.assertEqual(tcp.dport, local_port)
2022 self.assert_packet_checksums_valid(p)
2024 self.logger.error(ppp("Unexpected or invalid packet:", p))
2027 # from server back to client (both VRF1, no translation)
2028 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
2029 IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) /
2030 TCP(sport=local_port, dport=12348))
2031 self.pg5.add_stream(p)
2032 self.pg_enable_capture(self.pg_interfaces)
2034 capture = self.pg6.get_capture(1)
2039 self.assertEqual(ip.src, self.pg5.remote_ip4)
2040 self.assertEqual(tcp.sport, local_port)
2041 self.assert_packet_checksums_valid(p)
2043 self.logger.error(ppp("Unexpected or invalid packet:", p))
2046 # from client VRF1 to server VRF0 (no translation)
2047 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2048 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
2049 TCP(sport=local_port, dport=12349))
2050 self.pg0.add_stream(p)
2051 self.pg_enable_capture(self.pg_interfaces)
2053 capture = self.pg6.get_capture(1)
2058 self.assertEqual(ip.src, self.pg0.remote_ip4)
2059 self.assertEqual(tcp.sport, local_port)
2060 self.assert_packet_checksums_valid(p)
2062 self.logger.error(ppp("Unexpected or invalid packet:", p))
2065 # from server VRF0 back to client VRF1 (no translation)
2066 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2067 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
2068 TCP(sport=local_port, dport=12349))
2069 self.pg0.add_stream(p)
2070 self.pg_enable_capture(self.pg_interfaces)
2072 capture = self.pg6.get_capture(1)
2077 self.assertEqual(ip.src, self.pg0.remote_ip4)
2078 self.assertEqual(tcp.sport, local_port)
2079 self.assert_packet_checksums_valid(p)
2081 self.logger.error(ppp("Unexpected or invalid packet:", p))
2084 # from client VRF0 to server VRF1 (no translation)
2085 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2086 IP(src=self.pg0.remote_ip4, dst=self.pg5.remote_ip4) /
2087 TCP(sport=12344, dport=local_port))
2088 self.pg0.add_stream(p)
2089 self.pg_enable_capture(self.pg_interfaces)
2091 capture = self.pg5.get_capture(1)
2096 self.assertEqual(ip.dst, self.pg5.remote_ip4)
2097 self.assertEqual(tcp.dport, local_port)
2098 self.assert_packet_checksums_valid(p)
2100 self.logger.error(ppp("Unexpected or invalid packet:", p))
2103 # from server VRF1 back to client VRF0 (no translation)
2104 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
2105 IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) /
2106 TCP(sport=local_port, dport=12344))
2107 self.pg5.add_stream(p)
2108 self.pg_enable_capture(self.pg_interfaces)
2110 capture = self.pg0.get_capture(1)
2115 self.assertEqual(ip.src, self.pg5.remote_ip4)
2116 self.assertEqual(tcp.sport, local_port)
2117 self.assert_packet_checksums_valid(p)
2119 self.logger.error(ppp("Unexpected or invalid packet:", p))
2122 def test_outside_address_distribution(self):
2123 """ Outside address distribution based on source address """
2128 for i in range(1, x):
2130 nat_addresses.append(a)
2132 self.nat_add_inside_interface(self.pg0)
2133 self.nat_add_outside_interface(self.pg1)
2135 self.vapi.nat44_add_del_address_range(
2136 first_ip_address=nat_addresses[0],
2137 last_ip_address=nat_addresses[-1],
2138 vrf_id=0xFFFFFFFF, is_add=1, flags=0)
2140 self.pg0.generate_remote_hosts(x)
2144 info = self.create_packet_info(self.pg0, self.pg1)
2145 payload = self.info_to_payload(info)
2146 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2147 IP(src=self.pg0.remote_hosts[i].ip4,
2148 dst=self.pg1.remote_ip4) /
2149 UDP(sport=7000+i, dport=8000+i) /
2154 self.pg0.add_stream(pkts)
2155 self.pg_enable_capture(self.pg_interfaces)
2157 recvd = self.pg1.get_capture(len(pkts))
2158 for p_recvd in recvd:
2159 payload_info = self.payload_to_info(p_recvd[Raw])
2160 packet_index = payload_info.index
2161 info = self._packet_infos[packet_index]
2162 self.assertTrue(info is not None)
2163 self.assertEqual(packet_index, info.index)
2165 packed = socket.inet_aton(p_sent[IP].src)
2166 numeric = struct.unpack("!L", packed)[0]
2167 numeric = socket.htonl(numeric)
2168 a = nat_addresses[(numeric-1) % len(nat_addresses)]
2171 "Invalid packet (src IP %s translated to %s, but expected %s)"
2172 % (p_sent[IP].src, p_recvd[IP].src, a))
2175 class TestNAT44EDMW(TestNAT44ED):
2176 """ NAT44ED MW Test Case """
2177 vpp_worker_count = 4
2180 def test_dynamic(self):
2181 """ NAT44ED dynamic translation test """
2183 tcp_port_offset = 20
2184 udp_port_offset = 20
2187 self.nat_add_address(self.nat_addr)
2188 self.nat_add_inside_interface(self.pg0)
2189 self.nat_add_outside_interface(self.pg1)
2192 tc1 = self.statistics['/nat44-ed/in2out/slowpath/tcp']
2193 uc1 = self.statistics['/nat44-ed/in2out/slowpath/udp']
2194 ic1 = self.statistics['/nat44-ed/in2out/slowpath/icmp']
2195 dc1 = self.statistics['/nat44-ed/in2out/slowpath/drops']
2197 i2o_pkts = [[] for x in range(0, self.vpp_worker_count)]
2199 for i in range(pkt_count):
2200 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2201 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2202 TCP(sport=tcp_port_offset + i, dport=20))
2203 i2o_pkts[p[TCP].sport % self.vpp_worker_count].append(p)
2205 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2206 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2207 UDP(sport=udp_port_offset + i, dport=20))
2208 i2o_pkts[p[UDP].sport % self.vpp_worker_count].append(p)
2210 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2211 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2212 ICMP(id=icmp_id_offset + i, type='echo-request'))
2213 i2o_pkts[p[ICMP].id % self.vpp_worker_count].append(p)
2215 for i in range(0, self.vpp_worker_count):
2216 if len(i2o_pkts[i]) > 0:
2217 self.pg0.add_stream(i2o_pkts[i], worker=i)
2219 self.pg_enable_capture(self.pg_interfaces)
2221 capture = self.pg1.get_capture(pkt_count * 3, timeout=5)
2223 if_idx = self.pg0.sw_if_index
2224 tc2 = self.statistics['/nat44-ed/in2out/slowpath/tcp']
2225 uc2 = self.statistics['/nat44-ed/in2out/slowpath/udp']
2226 ic2 = self.statistics['/nat44-ed/in2out/slowpath/icmp']
2227 dc2 = self.statistics['/nat44-ed/in2out/slowpath/drops']
2230 tc2[:, if_idx].sum() - tc1[:, if_idx].sum(), pkt_count)
2232 uc2[:, if_idx].sum() - uc1[:, if_idx].sum(), pkt_count)
2234 ic2[:, if_idx].sum() - ic1[:, if_idx].sum(), pkt_count)
2235 self.assertEqual(dc2[:, if_idx].sum() - dc1[:, if_idx].sum(), 0)
2237 self.logger.info(self.vapi.cli("show trace"))
2240 tc1 = self.statistics['/nat44-ed/out2in/fastpath/tcp']
2241 uc1 = self.statistics['/nat44-ed/out2in/fastpath/udp']
2242 ic1 = self.statistics['/nat44-ed/out2in/fastpath/icmp']
2243 dc1 = self.statistics['/nat44-ed/out2in/fastpath/drops']
2245 recvd_tcp_ports = set()
2246 recvd_udp_ports = set()
2247 recvd_icmp_ids = set()
2251 recvd_tcp_ports.add(p[TCP].sport)
2253 recvd_udp_ports.add(p[UDP].sport)
2255 recvd_icmp_ids.add(p[ICMP].id)
2257 recvd_tcp_ports = list(recvd_tcp_ports)
2258 recvd_udp_ports = list(recvd_udp_ports)
2259 recvd_icmp_ids = list(recvd_icmp_ids)
2261 o2i_pkts = [[] for x in range(0, self.vpp_worker_count)]
2262 for i in range(pkt_count):
2263 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2264 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2265 TCP(dport=choice(recvd_tcp_ports), sport=20))
2266 o2i_pkts[p[TCP].dport % self.vpp_worker_count].append(p)
2268 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2269 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2270 UDP(dport=choice(recvd_udp_ports), sport=20))
2271 o2i_pkts[p[UDP].dport % self.vpp_worker_count].append(p)
2273 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2274 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2275 ICMP(id=choice(recvd_icmp_ids), type='echo-reply'))
2276 o2i_pkts[p[ICMP].id % self.vpp_worker_count].append(p)
2278 for i in range(0, self.vpp_worker_count):
2279 if len(o2i_pkts[i]) > 0:
2280 self.pg1.add_stream(o2i_pkts[i], worker=i)
2282 self.pg_enable_capture(self.pg_interfaces)
2284 capture = self.pg0.get_capture(pkt_count * 3)
2285 for packet in capture:
2287 self.assert_packet_checksums_valid(packet)
2288 self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
2289 if packet.haslayer(TCP):
2290 self.assert_in_range(
2291 packet[TCP].dport, tcp_port_offset,
2292 tcp_port_offset + pkt_count, "dst TCP port")
2293 elif packet.haslayer(UDP):
2294 self.assert_in_range(
2295 packet[UDP].dport, udp_port_offset,
2296 udp_port_offset + pkt_count, "dst UDP port")
2298 self.assert_in_range(
2299 packet[ICMP].id, icmp_id_offset,
2300 icmp_id_offset + pkt_count, "ICMP id")
2302 self.logger.error(ppp("Unexpected or invalid packet "
2303 "(inside network):", packet))
2306 if_idx = self.pg1.sw_if_index
2307 tc2 = self.statistics['/nat44-ed/out2in/fastpath/tcp']
2308 uc2 = self.statistics['/nat44-ed/out2in/fastpath/udp']
2309 ic2 = self.statistics['/nat44-ed/out2in/fastpath/icmp']
2310 dc2 = self.statistics['/nat44-ed/out2in/fastpath/drops']
2313 tc2[:, if_idx].sum() - tc1[:, if_idx].sum(), pkt_count)
2315 uc2[:, if_idx].sum() - uc1[:, if_idx].sum(), pkt_count)
2317 ic2[:, if_idx].sum() - ic1[:, if_idx].sum(), pkt_count)
2318 self.assertEqual(dc2[:, if_idx].sum() - dc1[:, if_idx].sum(), 0)
2320 sc = self.statistics['/nat44-ed/total-sessions']
2321 self.assertEqual(sc[:, 0].sum(), len(recvd_tcp_ports) +
2322 len(recvd_udp_ports) + len(recvd_icmp_ids))
2324 def test_frag_in_order(self):
2325 """ NAT44ED translate fragments arriving in order """
2327 self.nat_add_address(self.nat_addr)
2328 self.nat_add_inside_interface(self.pg0)
2329 self.nat_add_outside_interface(self.pg1)
2331 self.frag_in_order(proto=IP_PROTOS.tcp, ignore_port=True)
2332 self.frag_in_order(proto=IP_PROTOS.udp, ignore_port=True)
2333 self.frag_in_order(proto=IP_PROTOS.icmp, ignore_port=True)
2335 def test_frag_in_order_do_not_translate(self):
2336 """ NAT44ED don't translate fragments arriving in order """
2338 self.nat_add_address(self.nat_addr)
2339 self.nat_add_inside_interface(self.pg0)
2340 self.nat_add_outside_interface(self.pg1)
2341 self.vapi.nat44_forwarding_enable_disable(enable=True)
2343 self.frag_in_order(proto=IP_PROTOS.tcp, dont_translate=True)
2345 def test_frag_out_of_order(self):
2346 """ NAT44ED translate fragments arriving out of order """
2348 self.nat_add_address(self.nat_addr)
2349 self.nat_add_inside_interface(self.pg0)
2350 self.nat_add_outside_interface(self.pg1)
2352 self.frag_out_of_order(proto=IP_PROTOS.tcp, ignore_port=True)
2353 self.frag_out_of_order(proto=IP_PROTOS.udp, ignore_port=True)
2354 self.frag_out_of_order(proto=IP_PROTOS.icmp, ignore_port=True)
2356 def test_frag_in_order_in_plus_out(self):
2357 """ NAT44ED in+out interface fragments in order """
2359 in_port = self.random_port()
2360 out_port = self.random_port()
2362 self.nat_add_address(self.nat_addr)
2363 self.nat_add_inside_interface(self.pg0)
2364 self.nat_add_outside_interface(self.pg0)
2365 self.nat_add_inside_interface(self.pg1)
2366 self.nat_add_outside_interface(self.pg1)
2368 # add static mappings for server
2369 self.nat_add_static_mapping(self.server_addr,
2373 proto=IP_PROTOS.tcp)
2374 self.nat_add_static_mapping(self.server_addr,
2378 proto=IP_PROTOS.udp)
2379 self.nat_add_static_mapping(self.server_addr,
2381 proto=IP_PROTOS.icmp)
2383 # run tests for each protocol
2384 self.frag_in_order_in_plus_out(self.server_addr,
2389 self.frag_in_order_in_plus_out(self.server_addr,
2394 self.frag_in_order_in_plus_out(self.server_addr,
2400 def test_frag_out_of_order_in_plus_out(self):
2401 """ NAT44ED in+out interface fragments out of order """
2403 in_port = self.random_port()
2404 out_port = self.random_port()
2406 self.nat_add_address(self.nat_addr)
2407 self.nat_add_inside_interface(self.pg0)
2408 self.nat_add_outside_interface(self.pg0)
2409 self.nat_add_inside_interface(self.pg1)
2410 self.nat_add_outside_interface(self.pg1)
2412 # add static mappings for server
2413 self.nat_add_static_mapping(self.server_addr,
2417 proto=IP_PROTOS.tcp)
2418 self.nat_add_static_mapping(self.server_addr,
2422 proto=IP_PROTOS.udp)
2423 self.nat_add_static_mapping(self.server_addr,
2425 proto=IP_PROTOS.icmp)
2427 # run tests for each protocol
2428 self.frag_out_of_order_in_plus_out(self.server_addr,
2433 self.frag_out_of_order_in_plus_out(self.server_addr,
2438 self.frag_out_of_order_in_plus_out(self.server_addr,
2444 def test_reass_hairpinning(self):
2445 """ NAT44ED fragments hairpinning """
2447 server_addr = self.pg0.remote_hosts[1].ip4
2449 host_in_port = self.random_port()
2450 server_in_port = self.random_port()
2451 server_out_port = self.random_port()
2453 self.nat_add_address(self.nat_addr)
2454 self.nat_add_inside_interface(self.pg0)
2455 self.nat_add_outside_interface(self.pg1)
2457 # add static mapping for server
2458 self.nat_add_static_mapping(server_addr, self.nat_addr,
2459 server_in_port, server_out_port,
2460 proto=IP_PROTOS.tcp)
2461 self.nat_add_static_mapping(server_addr, self.nat_addr,
2462 server_in_port, server_out_port,
2463 proto=IP_PROTOS.udp)
2464 self.nat_add_static_mapping(server_addr, self.nat_addr)
2466 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2467 host_in_port, proto=IP_PROTOS.tcp,
2469 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2470 host_in_port, proto=IP_PROTOS.udp,
2472 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2473 host_in_port, proto=IP_PROTOS.icmp,
2476 def test_session_limit_per_vrf(self):
2477 """ NAT44ED per vrf session limit """
2480 inside_vrf10 = self.pg2
2485 # 2 interfaces pg0, pg1 (vrf10, limit 1 tcp session)
2486 # non existing vrf_id makes process core dump
2487 self.vapi.nat44_set_session_limit(session_limit=limit, vrf_id=10)
2489 self.nat_add_inside_interface(inside)
2490 self.nat_add_inside_interface(inside_vrf10)
2491 self.nat_add_outside_interface(outside)
2494 self.nat_add_interface_address(outside)
2496 # BUG: causing core dump - when bad vrf_id is specified
2497 # self.nat_add_address(outside.local_ip4, vrf_id=20)
2499 stream = self.create_tcp_stream(inside_vrf10, outside, limit * 2)
2500 inside_vrf10.add_stream(stream)
2502 self.pg_enable_capture(self.pg_interfaces)
2505 capture = outside.get_capture(limit)
2507 stream = self.create_tcp_stream(inside, outside, limit * 2)
2508 inside.add_stream(stream)
2510 self.pg_enable_capture(self.pg_interfaces)
2513 capture = outside.get_capture(len(stream))
2515 def test_show_max_translations(self):
2516 """ NAT44ED API test - max translations per thread """
2517 nat_config = self.vapi.nat_show_config_2()
2518 self.assertEqual(self.max_sessions,
2519 nat_config.max_translations_per_thread)
2521 def test_lru_cleanup(self):
2522 """ NAT44ED LRU cleanup algorithm """
2524 self.nat_add_address(self.nat_addr)
2525 self.nat_add_inside_interface(self.pg0)
2526 self.nat_add_outside_interface(self.pg1)
2528 self.vapi.nat_set_timeouts(
2529 udp=1, tcp_established=7440, tcp_transitory=30, icmp=1)
2531 tcp_port_out = self.init_tcp_session(self.pg0, self.pg1, 2000, 80)
2533 for i in range(0, self.max_sessions - 1):
2534 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2535 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
2536 UDP(sport=7000+i, dport=80))
2539 self.pg0.add_stream(pkts)
2540 self.pg_enable_capture(self.pg_interfaces)
2542 self.pg1.get_capture(len(pkts))
2543 self.virtual_sleep(1.5, "wait for timeouts")
2546 for i in range(0, self.max_sessions - 1):
2547 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2548 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
2549 ICMP(id=8000+i, type='echo-request'))
2552 self.pg0.add_stream(pkts)
2553 self.pg_enable_capture(self.pg_interfaces)
2555 self.pg1.get_capture(len(pkts))
2557 def test_session_rst_timeout(self):
2558 """ NAT44ED session RST timeouts """
2560 self.nat_add_address(self.nat_addr)
2561 self.nat_add_inside_interface(self.pg0)
2562 self.nat_add_outside_interface(self.pg1)
2564 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
2565 tcp_transitory=5, icmp=60)
2567 self.init_tcp_session(self.pg0, self.pg1, self.tcp_port_in,
2568 self.tcp_external_port)
2569 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2570 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2571 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2573 self.send_and_expect(self.pg0, p, self.pg1)
2575 self.virtual_sleep(6)
2577 # The session is already closed
2578 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2579 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2580 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2582 self.send_and_assert_no_replies(self.pg0, p, self.pg1)
2584 # The session can be re-opened
2585 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2586 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2587 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2589 self.send_and_expect(self.pg0, p, self.pg1)
2591 def test_session_rst_established_timeout(self):
2592 """ NAT44ED session RST timeouts """
2594 self.nat_add_address(self.nat_addr)
2595 self.nat_add_inside_interface(self.pg0)
2596 self.nat_add_outside_interface(self.pg1)
2598 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
2599 tcp_transitory=5, icmp=60)
2601 self.init_tcp_session(self.pg0, self.pg1, self.tcp_port_in,
2602 self.tcp_external_port)
2604 # Wait at least the transitory time, the session is in established
2605 # state anyway. RST followed by a data packet should keep it
2607 self.virtual_sleep(6)
2608 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2609 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2610 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2612 self.send_and_expect(self.pg0, p, self.pg1)
2614 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2615 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2616 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2618 self.send_and_expect(self.pg0, p, self.pg1)
2620 # State is established, session should be still open after 6 seconds
2621 self.virtual_sleep(6)
2623 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2624 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2625 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2627 self.send_and_expect(self.pg0, p, self.pg1)
2629 # State is transitory, session should be closed after 6 seconds
2630 self.virtual_sleep(6)
2632 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2633 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2634 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2636 self.send_and_assert_no_replies(self.pg0, p, self.pg1)
2638 def test_dynamic_out_of_ports(self):
2639 """ NAT44ED dynamic translation test: out of ports """
2641 self.nat_add_inside_interface(self.pg0)
2642 self.nat_add_outside_interface(self.pg1)
2644 # in2out and no NAT addresses added
2645 pkts = self.create_stream_in(self.pg0, self.pg1)
2647 self.send_and_assert_no_replies(
2648 self.pg0, pkts, msg="i2o pkts",
2649 stats_diff=self.no_diff | {
2651 '/err/nat44-ed-in2out-slowpath/out of ports': len(pkts),
2653 self.pg0.sw_if_index: {
2654 '/nat44-ed/in2out/slowpath/drops': len(pkts),
2659 # in2out after NAT addresses added
2660 self.nat_add_address(self.nat_addr)
2662 tcpn, udpn, icmpn = (sum(x) for x in
2663 zip(*((TCP in p, UDP in p, ICMP in p)
2666 self.send_and_expect(
2667 self.pg0, pkts, self.pg1, msg="i2o pkts",
2668 stats_diff=self.no_diff | {
2670 '/err/nat44-ed-in2out-slowpath/out of ports': 0,
2672 self.pg0.sw_if_index: {
2673 '/nat44-ed/in2out/slowpath/drops': 0,
2674 '/nat44-ed/in2out/slowpath/tcp': tcpn,
2675 '/nat44-ed/in2out/slowpath/udp': udpn,
2676 '/nat44-ed/in2out/slowpath/icmp': icmpn,
2681 def test_unknown_proto(self):
2682 """ NAT44ED translate packet with unknown protocol """
2684 self.nat_add_address(self.nat_addr)
2685 self.nat_add_inside_interface(self.pg0)
2686 self.nat_add_outside_interface(self.pg1)
2689 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2690 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2691 TCP(sport=self.tcp_port_in, dport=20))
2692 self.pg0.add_stream(p)
2693 self.pg_enable_capture(self.pg_interfaces)
2695 p = self.pg1.get_capture(1)
2697 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2698 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2700 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2701 TCP(sport=1234, dport=1234))
2702 self.pg0.add_stream(p)
2703 self.pg_enable_capture(self.pg_interfaces)
2705 p = self.pg1.get_capture(1)
2708 self.assertEqual(packet[IP].src, self.nat_addr)
2709 self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
2710 self.assertEqual(packet.haslayer(GRE), 1)
2711 self.assert_packet_checksums_valid(packet)
2713 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2717 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2718 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2720 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2721 TCP(sport=1234, dport=1234))
2722 self.pg1.add_stream(p)
2723 self.pg_enable_capture(self.pg_interfaces)
2725 p = self.pg0.get_capture(1)
2728 self.assertEqual(packet[IP].src, self.pg1.remote_ip4)
2729 self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
2730 self.assertEqual(packet.haslayer(GRE), 1)
2731 self.assert_packet_checksums_valid(packet)
2733 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2736 def test_hairpinning_unknown_proto(self):
2737 """ NAT44ED translate packet with unknown protocol - hairpinning """
2738 host = self.pg0.remote_hosts[0]
2739 server = self.pg0.remote_hosts[1]
2741 server_out_port = 8765
2742 server_nat_ip = "10.0.0.11"
2744 self.nat_add_address(self.nat_addr)
2745 self.nat_add_inside_interface(self.pg0)
2746 self.nat_add_outside_interface(self.pg1)
2748 # add static mapping for server
2749 self.nat_add_static_mapping(server.ip4, server_nat_ip)
2752 p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
2753 IP(src=host.ip4, dst=server_nat_ip) /
2754 TCP(sport=host_in_port, dport=server_out_port))
2755 self.pg0.add_stream(p)
2756 self.pg_enable_capture(self.pg_interfaces)
2758 self.pg0.get_capture(1)
2760 p = (Ether(dst=self.pg0.local_mac, src=host.mac) /
2761 IP(src=host.ip4, dst=server_nat_ip) /
2763 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2764 TCP(sport=1234, dport=1234))
2765 self.pg0.add_stream(p)
2766 self.pg_enable_capture(self.pg_interfaces)
2768 p = self.pg0.get_capture(1)
2771 self.assertEqual(packet[IP].src, self.nat_addr)
2772 self.assertEqual(packet[IP].dst, server.ip4)
2773 self.assertEqual(packet.haslayer(GRE), 1)
2774 self.assert_packet_checksums_valid(packet)
2776 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2780 p = (Ether(dst=self.pg0.local_mac, src=server.mac) /
2781 IP(src=server.ip4, dst=self.nat_addr) /
2783 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2784 TCP(sport=1234, dport=1234))
2785 self.pg0.add_stream(p)
2786 self.pg_enable_capture(self.pg_interfaces)
2788 p = self.pg0.get_capture(1)
2791 self.assertEqual(packet[IP].src, server_nat_ip)
2792 self.assertEqual(packet[IP].dst, host.ip4)
2793 self.assertEqual(packet.haslayer(GRE), 1)
2794 self.assert_packet_checksums_valid(packet)
2796 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2799 def test_output_feature_and_service(self):
2800 """ NAT44ED interface output feature and services """
2801 external_addr = '1.2.3.4'
2805 self.vapi.nat44_forwarding_enable_disable(enable=1)
2806 self.nat_add_address(self.nat_addr)
2807 flags = self.config_flags.NAT_IS_ADDR_ONLY
2808 self.vapi.nat44_add_del_identity_mapping(
2809 ip_address=self.pg1.remote_ip4, sw_if_index=0xFFFFFFFF,
2810 flags=flags, is_add=1)
2811 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
2812 self.nat_add_static_mapping(self.pg0.remote_ip4, external_addr,
2813 local_port, external_port,
2814 proto=IP_PROTOS.tcp, flags=flags)
2816 self.nat_add_inside_interface(self.pg0)
2817 self.nat_add_outside_interface(self.pg0)
2818 self.vapi.nat44_ed_add_del_output_interface(
2819 sw_if_index=self.pg1.sw_if_index, is_add=1)
2821 # from client to service
2822 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2823 IP(src=self.pg1.remote_ip4, dst=external_addr) /
2824 TCP(sport=12345, dport=external_port))
2825 self.pg1.add_stream(p)
2826 self.pg_enable_capture(self.pg_interfaces)
2828 capture = self.pg0.get_capture(1)
2833 self.assertEqual(ip.dst, self.pg0.remote_ip4)
2834 self.assertEqual(tcp.dport, local_port)
2835 self.assert_packet_checksums_valid(p)
2837 self.logger.error(ppp("Unexpected or invalid packet:", p))
2840 # from service back to client
2841 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2842 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2843 TCP(sport=local_port, dport=12345))
2844 self.pg0.add_stream(p)
2845 self.pg_enable_capture(self.pg_interfaces)
2847 capture = self.pg1.get_capture(1)
2852 self.assertEqual(ip.src, external_addr)
2853 self.assertEqual(tcp.sport, external_port)
2854 self.assert_packet_checksums_valid(p)
2856 self.logger.error(ppp("Unexpected or invalid packet:", p))
2859 # from local network host to external network
2860 pkts = self.create_stream_in(self.pg0, self.pg1)
2861 self.pg0.add_stream(pkts)
2862 self.pg_enable_capture(self.pg_interfaces)
2864 capture = self.pg1.get_capture(len(pkts))
2865 self.verify_capture_out(capture, ignore_port=True)
2866 pkts = self.create_stream_in(self.pg0, self.pg1)
2867 self.pg0.add_stream(pkts)
2868 self.pg_enable_capture(self.pg_interfaces)
2870 capture = self.pg1.get_capture(len(pkts))
2871 self.verify_capture_out(capture, ignore_port=True)
2873 # from external network back to local network host
2874 pkts = self.create_stream_out(self.pg1)
2875 self.pg1.add_stream(pkts)
2876 self.pg_enable_capture(self.pg_interfaces)
2878 capture = self.pg0.get_capture(len(pkts))
2879 self.verify_capture_in(capture, self.pg0)
2881 def test_output_feature_and_service3(self):
2882 """ NAT44ED interface output feature and DST NAT """
2883 external_addr = '1.2.3.4'
2887 self.vapi.nat44_forwarding_enable_disable(enable=1)
2888 self.nat_add_address(self.nat_addr)
2889 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
2890 self.nat_add_static_mapping(self.pg1.remote_ip4, external_addr,
2891 local_port, external_port,
2892 proto=IP_PROTOS.tcp, flags=flags)
2894 self.nat_add_inside_interface(self.pg0)
2895 self.nat_add_outside_interface(self.pg0)
2896 self.vapi.nat44_ed_add_del_output_interface(
2897 sw_if_index=self.pg1.sw_if_index, is_add=1)
2899 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2900 IP(src=self.pg0.remote_ip4, dst=external_addr) /
2901 TCP(sport=12345, dport=external_port))
2902 self.pg0.add_stream(p)
2903 self.pg_enable_capture(self.pg_interfaces)
2905 capture = self.pg1.get_capture(1)
2910 self.assertEqual(ip.src, self.pg0.remote_ip4)
2911 self.assertEqual(tcp.sport, 12345)
2912 self.assertEqual(ip.dst, self.pg1.remote_ip4)
2913 self.assertEqual(tcp.dport, local_port)
2914 self.assert_packet_checksums_valid(p)
2916 self.logger.error(ppp("Unexpected or invalid packet:", p))
2919 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2920 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
2921 TCP(sport=local_port, dport=12345))
2922 self.pg1.add_stream(p)
2923 self.pg_enable_capture(self.pg_interfaces)
2925 capture = self.pg0.get_capture(1)
2930 self.assertEqual(ip.src, external_addr)
2931 self.assertEqual(tcp.sport, external_port)
2932 self.assertEqual(ip.dst, self.pg0.remote_ip4)
2933 self.assertEqual(tcp.dport, 12345)
2934 self.assert_packet_checksums_valid(p)
2936 self.logger.error(ppp("Unexpected or invalid packet:", p))
2939 def test_self_twice_nat_lb_negative(self):
2940 """ NAT44ED Self Twice NAT local service load balancing (negative test)
2942 self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True,
2945 def test_self_twice_nat_negative(self):
2946 """ NAT44ED Self Twice NAT (negative test) """
2947 self.twice_nat_common(self_twice_nat=True)
2949 def test_static_lb_multi_clients(self):
2950 """ NAT44ED local service load balancing - multiple clients"""
2952 external_addr = self.nat_addr
2955 server1 = self.pg0.remote_hosts[0]
2956 server2 = self.pg0.remote_hosts[1]
2957 server3 = self.pg0.remote_hosts[2]
2959 locals = [{'addr': server1.ip4,
2963 {'addr': server2.ip4,
2968 flags = self.config_flags.NAT_IS_INSIDE
2969 self.vapi.nat44_interface_add_del_feature(
2970 sw_if_index=self.pg0.sw_if_index,
2971 flags=flags, is_add=1)
2972 self.vapi.nat44_interface_add_del_feature(
2973 sw_if_index=self.pg1.sw_if_index,
2976 self.nat_add_address(self.nat_addr)
2977 self.vapi.nat44_add_del_lb_static_mapping(is_add=1,
2978 external_addr=external_addr,
2979 external_port=external_port,
2980 protocol=IP_PROTOS.tcp,
2981 local_num=len(locals),
2986 clients = ip4_range(self.pg1.remote_ip4, 10, 50)
2988 for client in clients:
2989 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2990 IP(src=client, dst=self.nat_addr) /
2991 TCP(sport=12345, dport=external_port))
2993 self.pg1.add_stream(pkts)
2994 self.pg_enable_capture(self.pg_interfaces)
2996 capture = self.pg0.get_capture(len(pkts))
2998 if p[IP].dst == server1.ip4:
3002 self.assertGreaterEqual(server1_n, server2_n)
3005 'addr': server3.ip4,
3012 self.vapi.nat44_lb_static_mapping_add_del_local(
3014 external_addr=external_addr,
3015 external_port=external_port,
3017 protocol=IP_PROTOS.tcp)
3021 clients = ip4_range(self.pg1.remote_ip4, 60, 110)
3023 for client in clients:
3024 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3025 IP(src=client, dst=self.nat_addr) /
3026 TCP(sport=12346, dport=external_port))
3028 self.assertGreater(len(pkts), 0)
3029 self.pg1.add_stream(pkts)
3030 self.pg_enable_capture(self.pg_interfaces)
3032 capture = self.pg0.get_capture(len(pkts))
3034 if p[IP].dst == server1.ip4:
3036 elif p[IP].dst == server2.ip4:
3040 self.assertGreater(server1_n, 0)
3041 self.assertGreater(server2_n, 0)
3042 self.assertGreater(server3_n, 0)
3045 'addr': server2.ip4,
3051 # remove one back-end
3052 self.vapi.nat44_lb_static_mapping_add_del_local(
3054 external_addr=external_addr,
3055 external_port=external_port,
3057 protocol=IP_PROTOS.tcp)
3061 self.pg1.add_stream(pkts)
3062 self.pg_enable_capture(self.pg_interfaces)
3064 capture = self.pg0.get_capture(len(pkts))
3066 if p[IP].dst == server1.ip4:
3068 elif p[IP].dst == server2.ip4:
3072 self.assertGreater(server1_n, 0)
3073 self.assertEqual(server2_n, 0)
3074 self.assertGreater(server3_n, 0)
3076 # put zzz in front of syslog test name so that it runs as a last test
3077 # setting syslog sender cannot be undone and if it is set, it messes
3078 # with self.send_and_assert_no_replies functionality
3079 def test_zzz_syslog_sess(self):
3080 """ NAT44ED Test syslog session creation and deletion """
3081 self.vapi.syslog_set_filter(
3082 self.syslog_severity.SYSLOG_API_SEVERITY_INFO)
3083 self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4)
3085 self.nat_add_address(self.nat_addr)
3086 self.nat_add_inside_interface(self.pg0)
3087 self.nat_add_outside_interface(self.pg1)
3089 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
3090 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3091 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port))
3092 self.pg0.add_stream(p)
3093 self.pg_enable_capture(self.pg_interfaces)
3095 capture = self.pg1.get_capture(1)
3096 self.tcp_port_out = capture[0][TCP].sport
3097 capture = self.pg3.get_capture(1)
3098 self.verify_syslog_sess(capture[0][Raw].load, 'SADD')
3100 self.pg_enable_capture(self.pg_interfaces)
3102 self.nat_add_address(self.nat_addr, is_add=0)
3103 capture = self.pg3.get_capture(1)
3104 self.verify_syslog_sess(capture[0][Raw].load, 'SDEL')
3106 # put zzz in front of syslog test name so that it runs as a last test
3107 # setting syslog sender cannot be undone and if it is set, it messes
3108 # with self.send_and_assert_no_replies functionality
3109 def test_zzz_syslog_sess_reopen(self):
3110 """ Syslog events for session reopen """
3111 self.vapi.syslog_set_filter(
3112 self.syslog_severity.SYSLOG_API_SEVERITY_INFO)
3113 self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4)
3115 self.nat_add_address(self.nat_addr)
3116 self.nat_add_inside_interface(self.pg0)
3117 self.nat_add_outside_interface(self.pg1)
3120 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
3121 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3122 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port))
3123 capture = self.send_and_expect(self.pg0, p, self.pg1)[0]
3124 self.tcp_port_out = capture[0][TCP].sport
3125 capture = self.pg3.get_capture(1)
3126 self.verify_syslog_sess(capture[0][Raw].load, 'SADD')
3129 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
3130 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3131 TCP(sport=self.tcp_external_port, dport=self.tcp_port_out))
3132 self.send_and_expect(self.pg1, p, self.pg0)
3135 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
3136 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3137 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
3139 self.send_and_expect(self.pg0, p, self.pg1)
3142 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
3143 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3144 TCP(sport=self.tcp_external_port, dport=self.tcp_port_out,
3146 self.send_and_expect(self.pg1, p, self.pg0)
3149 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
3150 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3151 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port))
3152 self.send_and_expect(self.pg0, p, self.pg1)
3155 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
3156 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3157 TCP(sport=self.tcp_external_port, dport=self.tcp_port_out))
3158 self.send_and_expect(self.pg1, p, self.pg0)
3160 # 2 records should be produced - first one del & add
3161 capture = self.pg3.get_capture(2)
3162 self.verify_syslog_sess(capture[0][Raw].load, 'SDEL')
3163 self.verify_syslog_sess(capture[1][Raw].load, 'SADD')
3165 def test_twice_nat_interface_addr(self):
3166 """ NAT44ED Acquire twice NAT addresses from interface """
3167 flags = self.config_flags.NAT_IS_TWICE_NAT
3168 self.vapi.nat44_add_del_interface_addr(
3169 sw_if_index=self.pg11.sw_if_index,
3170 flags=flags, is_add=1)
3172 # no address in NAT pool
3173 adresses = self.vapi.nat44_address_dump()
3174 self.assertEqual(0, len(adresses))
3176 # configure interface address and check NAT address pool
3177 self.pg11.config_ip4()
3178 adresses = self.vapi.nat44_address_dump()
3179 self.assertEqual(1, len(adresses))
3180 self.assertEqual(str(adresses[0].ip_address),
3181 self.pg11.local_ip4)
3182 self.assertEqual(adresses[0].flags, flags)
3184 # remove interface address and check NAT address pool
3185 self.pg11.unconfig_ip4()
3186 adresses = self.vapi.nat44_address_dump()
3187 self.assertEqual(0, len(adresses))
3189 def test_output_feature_stateful_acl(self):
3190 """ NAT44ED output feature works with stateful ACL """
3192 self.nat_add_address(self.nat_addr)
3193 self.vapi.nat44_ed_add_del_output_interface(
3194 sw_if_index=self.pg1.sw_if_index, is_add=1)
3196 # First ensure that the NAT is working sans ACL
3198 # send packets out2in, no sessions yet so packets should drop
3199 pkts_out2in = self.create_stream_out(self.pg1)
3200 self.send_and_assert_no_replies(self.pg1, pkts_out2in)
3202 # send packets into inside intf, ensure received via outside intf
3203 pkts_in2out = self.create_stream_in(self.pg0, self.pg1)
3204 capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1,
3206 self.verify_capture_out(capture, ignore_port=True)
3208 # send out2in again, with sessions created it should work now
3209 pkts_out2in = self.create_stream_out(self.pg1)
3210 capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0,
3212 self.verify_capture_in(capture, self.pg0)
3214 # Create an ACL blocking everything
3215 out2in_deny_rule = AclRule(is_permit=0)
3216 out2in_acl = VppAcl(self, rules=[out2in_deny_rule])
3217 out2in_acl.add_vpp_config()
3219 # create an ACL to permit/reflect everything
3220 in2out_reflect_rule = AclRule(is_permit=2)
3221 in2out_acl = VppAcl(self, rules=[in2out_reflect_rule])
3222 in2out_acl.add_vpp_config()
3224 # apply as input acl on interface and confirm it blocks everything
3225 acl_if = VppAclInterface(self, sw_if_index=self.pg1.sw_if_index,
3226 n_input=1, acls=[out2in_acl])
3227 acl_if.add_vpp_config()
3228 self.send_and_assert_no_replies(self.pg1, pkts_out2in)
3231 acl_if.acls = [out2in_acl, in2out_acl]
3232 acl_if.add_vpp_config()
3233 # send in2out to generate ACL state (NAT state was created earlier)
3234 capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1,
3236 self.verify_capture_out(capture, ignore_port=True)
3238 # send out2in again. ACL state exists so it should work now.
3239 # TCP packets with the syn flag set also need the ack flag
3240 for p in pkts_out2in:
3241 if p.haslayer(TCP) and p[TCP].flags & 0x02:
3242 p[TCP].flags |= 0x10
3243 capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0,
3245 self.verify_capture_in(capture, self.pg0)
3246 self.logger.info(self.vapi.cli("show trace"))
3248 def test_tcp_close(self):
3249 """ NAT44ED Close TCP session from inside network - output feature """
3250 old_timeouts = self.vapi.nat_get_timeouts()
3252 self.vapi.nat_set_timeouts(
3253 udp=old_timeouts.udp,
3254 tcp_established=old_timeouts.tcp_established,
3255 icmp=old_timeouts.icmp,
3256 tcp_transitory=new_transitory)
3258 self.vapi.nat44_forwarding_enable_disable(enable=1)
3259 self.nat_add_address(self.pg1.local_ip4)
3260 twice_nat_addr = '10.0.1.3'
3261 service_ip = '192.168.16.150'
3262 self.nat_add_address(twice_nat_addr, twice_nat=1)
3264 flags = self.config_flags.NAT_IS_INSIDE
3265 self.vapi.nat44_interface_add_del_feature(
3266 sw_if_index=self.pg0.sw_if_index,
3268 self.vapi.nat44_interface_add_del_feature(
3269 sw_if_index=self.pg0.sw_if_index,
3270 flags=flags, is_add=1)
3271 self.vapi.nat44_ed_add_del_output_interface(
3273 sw_if_index=self.pg1.sw_if_index)
3275 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3276 self.config_flags.NAT_IS_TWICE_NAT)
3277 self.nat_add_static_mapping(self.pg0.remote_ip4,
3279 proto=IP_PROTOS.tcp,
3281 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3282 start_sessnum = len(sessions)
3284 # SYN packet out->in
3285 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3286 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3287 TCP(sport=33898, dport=80, flags="S"))
3288 capture = self.send_and_expect(self.pg1, p, self.pg0, n_rx=1)
3290 tcp_port = p[TCP].sport
3292 # SYN + ACK packet in->out
3293 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3294 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3295 TCP(sport=80, dport=tcp_port, flags="SA"))
3296 self.send_and_expect(self.pg0, p, self.pg1, n_rx=1)
3298 # ACK packet out->in
3299 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3300 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3301 TCP(sport=33898, dport=80, flags="A"))
3302 self.send_and_expect(self.pg1, p, self.pg0, n_rx=1)
3304 # FIN packet in -> out
3305 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3306 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3307 TCP(sport=80, dport=tcp_port, flags="FA", seq=100, ack=300))
3308 self.send_and_expect(self.pg0, p, self.pg1, n_rx=1)
3310 # FIN+ACK packet out -> in
3311 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3312 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3313 TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
3314 self.send_and_expect(self.pg1, p, self.pg0, n_rx=1)
3316 # ACK packet in -> out
3317 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3318 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3319 TCP(sport=80, dport=tcp_port, flags="A", seq=101, ack=301))
3320 self.send_and_expect(self.pg0, p, self.pg1, n_rx=1)
3322 # session now in transitory timeout, but traffic still flows
3323 # try FIN packet out->in
3324 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3325 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3326 TCP(sport=33898, dport=80, flags="F"))
3327 self.pg1.add_stream(p)
3328 self.pg_enable_capture(self.pg_interfaces)
3331 self.virtual_sleep(new_transitory, "wait for transitory timeout")
3332 self.pg0.get_capture(1)
3334 # session should still exist
3335 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3336 self.assertEqual(len(sessions) - start_sessnum, 1)
3338 # send FIN+ACK packet out -> in - will cause session to be wiped
3339 # but won't create a new session
3340 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3341 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3342 TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
3343 self.send_and_assert_no_replies(self.pg1, p)
3344 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3345 self.assertEqual(len(sessions) - start_sessnum, 0)
3347 def test_tcp_session_close_in(self):
3348 """ NAT44ED Close TCP session from inside network """
3350 in_port = self.tcp_port_in
3352 ext_port = self.tcp_external_port
3354 self.nat_add_address(self.nat_addr)
3355 self.nat_add_inside_interface(self.pg0)
3356 self.nat_add_outside_interface(self.pg1)
3357 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3358 in_port, out_port, proto=IP_PROTOS.tcp,
3359 flags=self.config_flags.NAT_IS_TWICE_NAT)
3361 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3362 session_n = len(sessions)
3364 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3365 tcp_transitory=2, icmp=5)
3367 self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3369 # FIN packet in -> out
3370 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3371 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3372 TCP(sport=in_port, dport=ext_port,
3373 flags="FA", seq=100, ack=300))
3374 self.send_and_expect(self.pg0, p, self.pg1)
3377 # ACK packet out -> in
3378 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3379 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3380 TCP(sport=ext_port, dport=out_port,
3381 flags="A", seq=300, ack=101))
3384 # FIN packet out -> in
3385 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3386 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3387 TCP(sport=ext_port, dport=out_port,
3388 flags="FA", seq=300, ack=101))
3391 self.send_and_expect(self.pg1, pkts, self.pg0)
3393 # ACK packet in -> out
3394 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3395 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3396 TCP(sport=in_port, dport=ext_port,
3397 flags="A", seq=101, ack=301))
3398 self.send_and_expect(self.pg0, p, self.pg1)
3400 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3401 self.assertEqual(len(sessions) - session_n, 1)
3403 # retransmit FIN packet out -> in
3404 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3405 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3406 TCP(sport=ext_port, dport=out_port,
3407 flags="FA", seq=300, ack=101))
3409 self.send_and_expect(self.pg1, p, self.pg0)
3411 # retransmit ACK packet in -> out
3412 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3413 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3414 TCP(sport=in_port, dport=ext_port,
3415 flags="A", seq=101, ack=301))
3416 self.send_and_expect(self.pg0, p, self.pg1)
3418 self.virtual_sleep(3)
3419 # retransmit ACK packet in -> out - this will cause session to be wiped
3420 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3421 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3422 TCP(sport=in_port, dport=ext_port,
3423 flags="A", seq=101, ack=301))
3424 self.send_and_assert_no_replies(self.pg0, p)
3425 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3426 self.assertEqual(len(sessions) - session_n, 0)
3428 def test_tcp_session_close_out(self):
3429 """ NAT44ED Close TCP session from outside network """
3431 in_port = self.tcp_port_in
3433 ext_port = self.tcp_external_port
3435 self.nat_add_address(self.nat_addr)
3436 self.nat_add_inside_interface(self.pg0)
3437 self.nat_add_outside_interface(self.pg1)
3438 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3439 in_port, out_port, proto=IP_PROTOS.tcp,
3440 flags=self.config_flags.NAT_IS_TWICE_NAT)
3442 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3443 session_n = len(sessions)
3445 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3446 tcp_transitory=2, icmp=5)
3448 _ = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3450 # FIN packet out -> in
3451 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3452 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3453 TCP(sport=ext_port, dport=out_port,
3454 flags="FA", seq=100, ack=300))
3455 self.pg1.add_stream(p)
3456 self.pg_enable_capture(self.pg_interfaces)
3458 self.pg0.get_capture(1)
3460 # FIN+ACK packet in -> out
3461 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3462 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3463 TCP(sport=in_port, dport=ext_port,
3464 flags="FA", seq=300, ack=101))
3466 self.pg0.add_stream(p)
3467 self.pg_enable_capture(self.pg_interfaces)
3469 self.pg1.get_capture(1)
3471 # ACK packet out -> in
3472 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3473 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3474 TCP(sport=ext_port, dport=out_port,
3475 flags="A", seq=101, ack=301))
3476 self.pg1.add_stream(p)
3477 self.pg_enable_capture(self.pg_interfaces)
3479 self.pg0.get_capture(1)
3481 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3482 self.assertEqual(len(sessions) - session_n, 1)
3484 # retransmit FIN packet out -> in
3485 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3486 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3487 TCP(sport=ext_port, dport=out_port,
3488 flags="FA", seq=300, ack=101))
3489 self.send_and_expect(self.pg1, p, self.pg0)
3491 # retransmit ACK packet in -> out
3492 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3493 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3494 TCP(sport=in_port, dport=ext_port,
3495 flags="A", seq=101, ack=301))
3496 self.send_and_expect(self.pg0, p, self.pg1)
3498 self.virtual_sleep(3)
3499 # retransmit ACK packet in -> out - this will cause session to be wiped
3500 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3501 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3502 TCP(sport=in_port, dport=ext_port,
3503 flags="A", seq=101, ack=301))
3504 self.send_and_assert_no_replies(self.pg0, p)
3505 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3506 self.assertEqual(len(sessions) - session_n, 0)
3508 def test_tcp_session_close_simultaneous(self):
3509 """ Simultaneous TCP close from both sides """
3511 in_port = self.tcp_port_in
3514 self.nat_add_address(self.nat_addr)
3515 self.nat_add_inside_interface(self.pg0)
3516 self.nat_add_outside_interface(self.pg1)
3517 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3518 in_port, ext_port, proto=IP_PROTOS.tcp,
3519 flags=self.config_flags.NAT_IS_TWICE_NAT)
3521 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3522 session_n = len(sessions)
3524 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3525 tcp_transitory=2, icmp=5)
3527 out_port = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3529 # FIN packet in -> out
3530 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3531 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3532 TCP(sport=in_port, dport=ext_port,
3533 flags="FA", seq=100, ack=300))
3534 self.send_and_expect(self.pg0, p, self.pg1)
3536 # FIN packet out -> in
3537 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3538 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3539 TCP(sport=ext_port, dport=out_port,
3540 flags="FA", seq=300, ack=100))
3541 self.send_and_expect(self.pg1, p, self.pg0)
3543 # ACK packet in -> out
3544 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3545 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3546 TCP(sport=in_port, dport=ext_port,
3547 flags="A", seq=101, ack=301))
3548 self.send_and_expect(self.pg0, p, self.pg1)
3550 # ACK packet out -> in
3551 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3552 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3553 TCP(sport=ext_port, dport=out_port,
3554 flags="A", seq=301, ack=101))
3555 self.send_and_expect(self.pg1, p, self.pg0)
3557 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3558 self.assertEqual(len(sessions) - session_n, 1)
3560 # retransmit FIN packet out -> in
3561 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3562 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3563 TCP(sport=ext_port, dport=out_port,
3564 flags="FA", seq=300, ack=101))
3565 self.send_and_expect(self.pg1, p, self.pg0)
3567 # retransmit ACK packet in -> out
3568 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3569 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3570 TCP(sport=in_port, dport=ext_port,
3571 flags="A", seq=101, ack=301))
3572 self.send_and_expect(self.pg0, p, self.pg1)
3574 self.virtual_sleep(3)
3575 # retransmit ACK packet in -> out - this will cause session to be wiped
3576 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3577 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3578 TCP(sport=in_port, dport=ext_port,
3579 flags="A", seq=101, ack=301))
3580 self.pg_send(self.pg0, p)
3581 self.send_and_assert_no_replies(self.pg0, p)
3582 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3583 self.assertEqual(len(sessions) - session_n, 0)
3585 def test_tcp_session_half_reopen_inside(self):
3586 """ TCP session in FIN/FIN state not reopened by in2out SYN only """
3587 in_port = self.tcp_port_in
3590 self.nat_add_address(self.nat_addr)
3591 self.nat_add_inside_interface(self.pg0)
3592 self.nat_add_outside_interface(self.pg1)
3593 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3594 in_port, ext_port, proto=IP_PROTOS.tcp,
3595 flags=self.config_flags.NAT_IS_TWICE_NAT)
3597 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3598 session_n = len(sessions)
3600 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3601 tcp_transitory=2, icmp=5)
3603 out_port = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3605 # FIN packet in -> out
3606 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3607 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3608 TCP(sport=in_port, dport=ext_port,
3609 flags="FA", seq=100, ack=300))
3610 self.send_and_expect(self.pg0, p, self.pg1)
3612 # FIN packet out -> in
3613 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3614 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3615 TCP(sport=ext_port, dport=out_port,
3616 flags="FA", seq=300, ack=100))
3617 self.send_and_expect(self.pg1, p, self.pg0)
3619 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3620 self.assertEqual(len(sessions) - session_n, 1)
3622 # send SYN packet in -> out
3623 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3624 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3625 TCP(sport=in_port, dport=ext_port,
3626 flags="S", seq=101, ack=301))
3627 self.send_and_expect(self.pg0, p, self.pg1)
3629 self.virtual_sleep(3)
3630 # send ACK packet in -> out - session should be wiped
3631 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3632 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3633 TCP(sport=in_port, dport=ext_port,
3634 flags="A", seq=101, ack=301))
3635 self.send_and_assert_no_replies(self.pg0, p, self.pg1)
3636 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3637 self.assertEqual(len(sessions) - session_n, 0)
3639 def test_tcp_session_half_reopen_outside(self):
3640 """ TCP session in FIN/FIN state not reopened by out2in SYN only """
3641 in_port = self.tcp_port_in
3644 self.nat_add_address(self.nat_addr)
3645 self.nat_add_inside_interface(self.pg0)
3646 self.nat_add_outside_interface(self.pg1)
3647 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3648 in_port, ext_port, proto=IP_PROTOS.tcp,
3649 flags=self.config_flags.NAT_IS_TWICE_NAT)
3651 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3652 session_n = len(sessions)
3654 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3655 tcp_transitory=2, icmp=5)
3657 out_port = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3659 # FIN packet in -> out
3660 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3661 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3662 TCP(sport=in_port, dport=ext_port,
3663 flags="FA", seq=100, ack=300))
3664 self.send_and_expect(self.pg0, p, self.pg1)
3666 # FIN packet out -> in
3667 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3668 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3669 TCP(sport=ext_port, dport=out_port,
3670 flags="FA", seq=300, ack=100))
3671 self.send_and_expect(self.pg1, p, self.pg0)
3673 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3674 self.assertEqual(len(sessions) - session_n, 1)
3676 # send SYN packet out -> in
3677 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3678 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3679 TCP(sport=ext_port, dport=out_port,
3680 flags="S", seq=300, ack=101))
3681 self.send_and_expect(self.pg1, p, self.pg0)
3683 self.virtual_sleep(3)
3684 # send ACK packet in -> out - session should be wiped
3685 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3686 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3687 TCP(sport=in_port, dport=ext_port,
3688 flags="A", seq=101, ack=301))
3689 self.send_and_assert_no_replies(self.pg0, p, self.pg1)
3690 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3691 self.assertEqual(len(sessions) - session_n, 0)
3693 def test_tcp_session_reopen(self):
3694 """ TCP session in FIN/FIN state reopened by SYN from both sides """
3695 in_port = self.tcp_port_in
3698 self.nat_add_address(self.nat_addr)
3699 self.nat_add_inside_interface(self.pg0)
3700 self.nat_add_outside_interface(self.pg1)
3701 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3702 in_port, ext_port, proto=IP_PROTOS.tcp,
3703 flags=self.config_flags.NAT_IS_TWICE_NAT)
3705 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3706 session_n = len(sessions)
3708 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3709 tcp_transitory=2, icmp=5)
3711 out_port = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3713 # FIN packet in -> out
3714 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3715 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3716 TCP(sport=in_port, dport=ext_port,
3717 flags="FA", seq=100, ack=300))
3718 self.send_and_expect(self.pg0, p, self.pg1)
3720 # FIN packet out -> in
3721 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3722 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3723 TCP(sport=ext_port, dport=out_port,
3724 flags="FA", seq=300, ack=100))
3725 self.send_and_expect(self.pg1, p, self.pg0)
3727 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3728 self.assertEqual(len(sessions) - session_n, 1)
3730 # send SYN packet out -> in
3731 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3732 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3733 TCP(sport=ext_port, dport=out_port,
3734 flags="S", seq=300, ack=101))
3735 self.send_and_expect(self.pg1, p, self.pg0)
3737 # send SYN packet in -> out
3738 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3739 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3740 TCP(sport=in_port, dport=ext_port,
3741 flags="S", seq=101, ack=301))
3742 self.send_and_expect(self.pg0, p, self.pg1)
3744 self.virtual_sleep(3)
3745 # send ACK packet in -> out - should be forwarded and session alive
3746 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3747 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3748 TCP(sport=in_port, dport=ext_port,
3749 flags="A", seq=101, ack=301))
3750 self.send_and_expect(self.pg0, p, self.pg1)
3751 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3752 self.assertEqual(len(sessions) - session_n, 1)
3754 def test_dynamic_vrf(self):
3755 """ NAT44ED dynamic translation test: different VRF"""
3760 self.nat_add_address(self.nat_addr, vrf_id=vrf_id_in)
3763 self.configure_ip4_interface(self.pg7, table_id=vrf_id_in)
3764 self.configure_ip4_interface(self.pg8, table_id=vrf_id_out)
3766 self.nat_add_inside_interface(self.pg7)
3767 self.nat_add_outside_interface(self.pg8)
3769 # just basic stuff nothing special
3770 pkts = self.create_stream_in(self.pg7, self.pg8)
3771 self.pg7.add_stream(pkts)
3772 self.pg_enable_capture(self.pg_interfaces)
3774 capture = self.pg8.get_capture(len(pkts))
3775 self.verify_capture_out(capture, ignore_port=True)
3777 pkts = self.create_stream_out(self.pg8)
3778 self.pg8.add_stream(pkts)
3779 self.pg_enable_capture(self.pg_interfaces)
3781 capture = self.pg7.get_capture(len(pkts))
3782 self.verify_capture_in(capture, self.pg7)
3788 self.vapi.ip_table_add_del(is_add=0,
3789 table={'table_id': vrf_id_in})
3790 self.vapi.ip_table_add_del(is_add=0,
3791 table={'table_id': vrf_id_out})
3793 def test_dynamic_output_feature_vrf(self):
3794 """ NAT44ED dynamic translation test: output-feature, VRF"""
3796 # other then default (0)
3799 self.nat_add_address(self.nat_addr)
3800 self.vapi.nat44_interface_add_del_output_feature(
3801 sw_if_index=self.pg8.sw_if_index, is_add=1)
3804 self.configure_ip4_interface(self.pg7, table_id=new_vrf_id)
3805 self.configure_ip4_interface(self.pg8, table_id=new_vrf_id)
3808 tcpn = self.statistics['/nat44-ed/in2out/slowpath/tcp']
3809 udpn = self.statistics['/nat44-ed/in2out/slowpath/udp']
3810 icmpn = self.statistics['/nat44-ed/in2out/slowpath/icmp']
3811 drops = self.statistics['/nat44-ed/in2out/slowpath/drops']
3813 pkts = self.create_stream_in(self.pg7, self.pg8)
3814 self.pg7.add_stream(pkts)
3815 self.pg_enable_capture(self.pg_interfaces)
3817 capture = self.pg8.get_capture(len(pkts))
3818 self.verify_capture_out(capture, ignore_port=True)
3820 if_idx = self.pg8.sw_if_index
3821 cnt = self.statistics['/nat44-ed/in2out/slowpath/tcp']
3822 self.assertEqual(cnt[:, if_idx].sum() - tcpn[:, if_idx].sum(), 2)
3823 cnt = self.statistics['/nat44-ed/in2out/slowpath/udp']
3824 self.assertEqual(cnt[:, if_idx].sum() - udpn[:, if_idx].sum(), 1)
3825 cnt = self.statistics['/nat44-ed/in2out/slowpath/icmp']
3826 self.assertEqual(cnt[:, if_idx].sum() - icmpn[:, if_idx].sum(), 1)
3827 cnt = self.statistics['/nat44-ed/in2out/slowpath/drops']
3828 self.assertEqual(cnt[:, if_idx].sum() - drops[:, if_idx].sum(), 0)
3831 tcpn = self.statistics['/nat44-ed/out2in/fastpath/tcp']
3832 udpn = self.statistics['/nat44-ed/out2in/fastpath/udp']
3833 icmpn = self.statistics['/nat44-ed/out2in/fastpath/icmp']
3834 drops = self.statistics['/nat44-ed/out2in/fastpath/drops']
3836 pkts = self.create_stream_out(self.pg8)
3837 self.pg8.add_stream(pkts)
3838 self.pg_enable_capture(self.pg_interfaces)
3840 capture = self.pg7.get_capture(len(pkts))
3841 self.verify_capture_in(capture, self.pg7)
3843 if_idx = self.pg8.sw_if_index
3844 cnt = self.statistics['/nat44-ed/out2in/fastpath/tcp']
3845 self.assertEqual(cnt[:, if_idx].sum() - tcpn[:, if_idx].sum(), 2)
3846 cnt = self.statistics['/nat44-ed/out2in/fastpath/udp']
3847 self.assertEqual(cnt[:, if_idx].sum() - udpn[:, if_idx].sum(), 1)
3848 cnt = self.statistics['/nat44-ed/out2in/fastpath/icmp']
3849 self.assertEqual(cnt[:, if_idx].sum() - icmpn[:, if_idx].sum(), 1)
3850 cnt = self.statistics['/nat44-ed/out2in/fastpath/drops']
3851 self.assertEqual(cnt[:, if_idx].sum() - drops[:, if_idx].sum(), 0)
3853 sessions = self.statistics['/nat44-ed/total-sessions']
3854 self.assertEqual(sessions[:, 0].sum(), 3)
3860 self.vapi.ip_table_add_del(is_add=0,
3861 table={'table_id': new_vrf_id})
3863 def test_next_src_nat(self):
3864 """ NAT44ED On way back forward packet to nat44-in2out node. """
3866 twice_nat_addr = '10.0.1.3'
3869 post_twice_nat_port = 0
3871 self.vapi.nat44_forwarding_enable_disable(enable=1)
3872 self.nat_add_address(twice_nat_addr, twice_nat=1)
3873 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3874 self.config_flags.NAT_IS_SELF_TWICE_NAT)
3875 self.nat_add_static_mapping(self.pg6.remote_ip4, self.pg1.remote_ip4,
3876 local_port, external_port,
3877 proto=IP_PROTOS.tcp, vrf_id=1,
3879 self.vapi.nat44_interface_add_del_feature(
3880 sw_if_index=self.pg6.sw_if_index,
3883 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
3884 IP(src=self.pg6.remote_ip4, dst=self.pg1.remote_ip4) /
3885 TCP(sport=12345, dport=external_port))
3886 self.pg6.add_stream(p)
3887 self.pg_enable_capture(self.pg_interfaces)
3889 capture = self.pg6.get_capture(1)
3894 self.assertEqual(ip.src, twice_nat_addr)
3895 self.assertNotEqual(tcp.sport, 12345)
3896 post_twice_nat_port = tcp.sport
3897 self.assertEqual(ip.dst, self.pg6.remote_ip4)
3898 self.assertEqual(tcp.dport, local_port)
3899 self.assert_packet_checksums_valid(p)
3901 self.logger.error(ppp("Unexpected or invalid packet:", p))
3904 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
3905 IP(src=self.pg6.remote_ip4, dst=twice_nat_addr) /
3906 TCP(sport=local_port, dport=post_twice_nat_port))
3907 self.pg6.add_stream(p)
3908 self.pg_enable_capture(self.pg_interfaces)
3910 capture = self.pg6.get_capture(1)
3915 self.assertEqual(ip.src, self.pg1.remote_ip4)
3916 self.assertEqual(tcp.sport, external_port)
3917 self.assertEqual(ip.dst, self.pg6.remote_ip4)
3918 self.assertEqual(tcp.dport, 12345)
3919 self.assert_packet_checksums_valid(p)
3921 self.logger.error(ppp("Unexpected or invalid packet:", p))
3924 def test_one_armed_nat44_static(self):
3925 """ NAT44ED One armed NAT and 1:1 NAPT asymmetrical rule """
3927 remote_host = self.pg4.remote_hosts[0]
3928 local_host = self.pg4.remote_hosts[1]
3933 self.vapi.nat44_forwarding_enable_disable(enable=1)
3934 self.nat_add_address(self.nat_addr, twice_nat=1)
3935 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3936 self.config_flags.NAT_IS_TWICE_NAT)
3937 self.nat_add_static_mapping(local_host.ip4, self.nat_addr,
3938 local_port, external_port,
3939 proto=IP_PROTOS.tcp, flags=flags)
3940 flags = self.config_flags.NAT_IS_INSIDE
3941 self.vapi.nat44_interface_add_del_feature(
3942 sw_if_index=self.pg4.sw_if_index,
3944 self.vapi.nat44_interface_add_del_feature(
3945 sw_if_index=self.pg4.sw_if_index,
3946 flags=flags, is_add=1)
3948 # from client to service
3949 p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
3950 IP(src=remote_host.ip4, dst=self.nat_addr) /
3951 TCP(sport=12345, dport=external_port))
3952 self.pg4.add_stream(p)
3953 self.pg_enable_capture(self.pg_interfaces)
3955 capture = self.pg4.get_capture(1)
3960 self.assertEqual(ip.dst, local_host.ip4)
3961 self.assertEqual(ip.src, self.nat_addr)
3962 self.assertEqual(tcp.dport, local_port)
3963 self.assertNotEqual(tcp.sport, 12345)
3964 eh_port_in = tcp.sport
3965 self.assert_packet_checksums_valid(p)
3967 self.logger.error(ppp("Unexpected or invalid packet:", p))
3970 # from service back to client
3971 p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
3972 IP(src=local_host.ip4, dst=self.nat_addr) /
3973 TCP(sport=local_port, dport=eh_port_in))
3974 self.pg4.add_stream(p)
3975 self.pg_enable_capture(self.pg_interfaces)
3977 capture = self.pg4.get_capture(1)
3982 self.assertEqual(ip.src, self.nat_addr)
3983 self.assertEqual(ip.dst, remote_host.ip4)
3984 self.assertEqual(tcp.sport, external_port)
3985 self.assertEqual(tcp.dport, 12345)
3986 self.assert_packet_checksums_valid(p)
3988 self.logger.error(ppp("Unexpected or invalid packet:", p))
3991 def test_icmp_error_fwd_outbound(self):
3992 """ NAT44ED ICMP error outbound with forwarding enabled """
3994 # Ensure that an outbound ICMP error message is properly associated
3995 # with the inbound forward bypass session it is related to.
3998 self.nat_add_address(self.nat_addr)
3999 self.nat_add_inside_interface(self.pg0)
4000 self.nat_add_outside_interface(self.pg1)
4002 # enable forwarding and initiate connection out2in
4003 self.vapi.nat44_forwarding_enable_disable(enable=1)
4004 p1 = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
4005 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
4006 UDP(sport=21, dport=20) / payload)
4008 self.pg1.add_stream(p1)
4009 self.pg_enable_capture(self.pg_interfaces)
4011 capture = self.pg0.get_capture(1)[0]
4013 self.logger.info(self.vapi.cli("show nat44 sessions"))
4015 # reply with ICMP error message in2out
4016 # We cannot reliably retrieve forward bypass sessions via the API.
4017 # session dumps for a user will only look on the worker that the
4018 # user is supposed to be mapped to in2out. The forward bypass session
4019 # is not necessarily created on that worker.
4020 p2 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4021 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4022 ICMP(type='dest-unreach', code='port-unreachable') /
4025 self.pg0.add_stream(p2)
4026 self.pg_enable_capture(self.pg_interfaces)
4028 capture = self.pg1.get_capture(1)[0]
4030 self.logger.info(self.vapi.cli("show nat44 sessions"))
4032 self.logger.info(ppp("p1 packet:", p1))
4033 self.logger.info(ppp("p2 packet:", p2))
4034 self.logger.info(ppp("capture packet:", capture))
4036 def test_tcp_session_open_retransmit1(self):
4037 """ NAT44ED Open TCP session with SYN,ACK retransmit 1
4039 The client does not receive the [SYN,ACK] or the
4040 ACK from the client is lost. Therefore, the [SYN, ACK]
4041 is retransmitted by the server.
4044 in_port = self.tcp_port_in
4045 ext_port = self.tcp_external_port
4048 self.nat_add_address(self.nat_addr)
4049 self.nat_add_inside_interface(self.pg0)
4050 self.nat_add_outside_interface(self.pg1)
4052 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
4053 tcp_transitory=5, icmp=60)
4054 # SYN packet in->out
4055 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4056 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4057 TCP(sport=in_port, dport=ext_port, flags="S"))
4058 p = self.send_and_expect(self.pg0, p, self.pg1)[0]
4059 out_port = p[TCP].sport
4061 # SYN + ACK packet out->in
4062 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
4063 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
4064 TCP(sport=ext_port, dport=out_port, flags="SA"))
4065 self.send_and_expect(self.pg1, p, self.pg0)
4067 # ACK in->out does not arrive
4069 # resent SYN + ACK packet out->in
4070 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
4071 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
4072 TCP(sport=ext_port, dport=out_port, flags="SA"))
4073 self.send_and_expect(self.pg1, p, self.pg0)
4075 # ACK packet in->out
4076 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4077 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4078 TCP(sport=in_port, dport=ext_port, flags="A"))
4079 self.send_and_expect(self.pg0, p, self.pg1)
4081 # Verify that the data can be transmitted after the transitory time
4082 self.virtual_sleep(6)
4084 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4085 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4086 TCP(sport=in_port, dport=ext_port, flags="PA") /
4088 self.send_and_expect(self.pg0, p, self.pg1)
4090 def test_tcp_session_open_retransmit2(self):
4091 """ NAT44ED Open TCP session with SYN,ACK retransmit 2
4093 The ACK is lost to the server after the TCP session is opened.
4094 Data is sent by the client, then the [SYN,ACK] is
4095 retransmitted by the server.
4098 in_port = self.tcp_port_in
4099 ext_port = self.tcp_external_port
4102 self.nat_add_address(self.nat_addr)
4103 self.nat_add_inside_interface(self.pg0)
4104 self.nat_add_outside_interface(self.pg1)
4106 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
4107 tcp_transitory=5, icmp=60)
4108 # SYN packet in->out
4109 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4110 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4111 TCP(sport=in_port, dport=ext_port, flags="S"))
4112 p = self.send_and_expect(self.pg0, p, self.pg1)[0]
4113 out_port = p[TCP].sport
4115 # SYN + ACK packet out->in
4116 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
4117 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
4118 TCP(sport=ext_port, dport=out_port, flags="SA"))
4119 self.send_and_expect(self.pg1, p, self.pg0)
4121 # ACK packet in->out -- not received by the server
4122 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4123 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4124 TCP(sport=in_port, dport=ext_port, flags="A"))
4125 self.send_and_expect(self.pg0, p, self.pg1)
4127 # PUSH + ACK packet in->out
4128 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4129 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4130 TCP(sport=in_port, dport=ext_port, flags="PA") /
4132 self.send_and_expect(self.pg0, p, self.pg1)
4134 # resent SYN + ACK packet out->in
4135 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
4136 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
4137 TCP(sport=ext_port, dport=out_port, flags="SA"))
4138 self.send_and_expect(self.pg1, p, self.pg0)
4140 # resent ACK packet in->out
4141 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4142 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4143 TCP(sport=in_port, dport=ext_port, flags="A"))
4144 self.send_and_expect(self.pg0, p, self.pg1)
4146 # resent PUSH + ACK packet in->out
4147 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4148 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4149 TCP(sport=in_port, dport=ext_port, flags="PA") /
4151 self.send_and_expect(self.pg0, p, self.pg1)
4153 # ACK packet out->in
4154 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
4155 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
4156 TCP(sport=ext_port, dport=out_port, flags="A"))
4157 self.send_and_expect(self.pg1, p, self.pg0)
4159 # Verify that the data can be transmitted after the transitory time
4160 self.virtual_sleep(6)
4162 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
4163 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
4164 TCP(sport=in_port, dport=ext_port, flags="PA") /
4166 self.send_and_expect(self.pg0, p, self.pg1)
4169 if __name__ == '__main__':
4170 unittest.main(testRunner=VppTestRunner)