5 from random import randint, shuffle, choice
8 from framework import VppTestCase, VppTestRunner
9 from scapy.data import IP_PROTOS
10 from scapy.layers.inet import IP, TCP, UDP, ICMP, GRE
11 from scapy.layers.inet import IPerror, TCPerror
12 from scapy.layers.l2 import Ether
13 from scapy.packet import Raw
14 from syslog_rfc5424_parser import SyslogMessage, ParseError
15 from syslog_rfc5424_parser.constants import SyslogSeverity
16 from util import ppp, ip4_range
17 from vpp_acl import AclRule, VppAcl, VppAclInterface
18 from vpp_ip_route import VppIpRoute, VppRoutePath
19 from vpp_papi import VppEnum
22 class NAT44EDTestCase(VppTestCase):
35 tcp_external_port = 80
40 super(NAT44EDTestCase, self).setUp()
44 super(NAT44EDTestCase, self).tearDown()
48 def plugin_enable(self):
49 self.vapi.nat44_ed_plugin_enable_disable(
50 sessions=self.max_sessions, enable=1)
52 def plugin_disable(self):
53 self.vapi.nat44_ed_plugin_enable_disable(enable=0)
56 def config_flags(self):
57 return VppEnum.vl_api_nat_config_flags_t
60 def nat44_config_flags(self):
61 return VppEnum.vl_api_nat44_config_flags_t
64 def syslog_severity(self):
65 return VppEnum.vl_api_syslog_severity_t
68 def server_addr(self):
69 return self.pg1.remote_hosts[0].ip4
73 return randint(1025, 65535)
76 def proto2layer(proto):
77 if proto == IP_PROTOS.tcp:
79 elif proto == IP_PROTOS.udp:
81 elif proto == IP_PROTOS.icmp:
84 raise Exception("Unsupported protocol")
87 def create_and_add_ip4_table(cls, i, table_id=0):
88 cls.vapi.ip_table_add_del(is_add=1, table={'table_id': table_id})
89 i.set_table_ip4(table_id)
92 def configure_ip4_interface(cls, i, hosts=0, table_id=None):
94 cls.create_and_add_ip4_table(i, table_id)
101 i.generate_remote_hosts(hosts)
102 i.configure_ipv4_neighbors()
105 def nat_add_interface_address(cls, i):
106 cls.vapi.nat44_add_del_interface_addr(
107 sw_if_index=i.sw_if_index, is_add=1)
109 def nat_add_inside_interface(self, i):
110 self.vapi.nat44_interface_add_del_feature(
111 flags=self.config_flags.NAT_IS_INSIDE,
112 sw_if_index=i.sw_if_index, is_add=1)
114 def nat_add_outside_interface(self, i):
115 self.vapi.nat44_interface_add_del_feature(
116 flags=self.config_flags.NAT_IS_OUTSIDE,
117 sw_if_index=i.sw_if_index, is_add=1)
119 def nat_add_address(self, address, twice_nat=0,
120 vrf_id=0xFFFFFFFF, is_add=1):
121 flags = self.config_flags.NAT_IS_TWICE_NAT if twice_nat else 0
122 self.vapi.nat44_add_del_address_range(first_ip_address=address,
123 last_ip_address=address,
128 def nat_add_static_mapping(self, local_ip, external_ip='0.0.0.0',
129 local_port=0, external_port=0, vrf_id=0,
130 is_add=1, external_sw_if_index=0xFFFFFFFF,
131 proto=0, tag="", flags=0):
133 if not (local_port and external_port):
134 flags |= self.config_flags.NAT_IS_ADDR_ONLY
136 self.vapi.nat44_add_del_static_mapping(
138 local_ip_address=local_ip,
139 external_ip_address=external_ip,
140 external_sw_if_index=external_sw_if_index,
141 local_port=local_port,
142 external_port=external_port,
143 vrf_id=vrf_id, protocol=proto,
149 super(NAT44EDTestCase, cls).setUpClass()
151 cls.create_pg_interfaces(range(12))
152 cls.interfaces = list(cls.pg_interfaces[:4])
154 cls.create_and_add_ip4_table(cls.pg2, 10)
156 for i in cls.interfaces:
157 cls.configure_ip4_interface(i, hosts=3)
159 # test specific (test-multiple-vrf)
160 cls.vapi.ip_table_add_del(is_add=1, table={'table_id': 1})
162 # test specific (test-one-armed-nat44-static)
163 cls.pg4.generate_remote_hosts(2)
165 cls.vapi.sw_interface_add_del_address(
166 sw_if_index=cls.pg4.sw_if_index,
167 prefix="10.0.0.1/24")
169 cls.pg4.resolve_arp()
170 cls.pg4._remote_hosts[1]._ip4 = cls.pg4._remote_hosts[0]._ip4
171 cls.pg4.resolve_arp()
173 # test specific interface (pg5)
174 cls.pg5._local_ip4 = "10.1.1.1"
175 cls.pg5._remote_hosts[0]._ip4 = "10.1.1.2"
176 cls.pg5.set_table_ip4(1)
179 cls.pg5.resolve_arp()
181 # test specific interface (pg6)
182 cls.pg6._local_ip4 = "10.1.2.1"
183 cls.pg6._remote_hosts[0]._ip4 = "10.1.2.2"
184 cls.pg6.set_table_ip4(1)
187 cls.pg6.resolve_arp()
191 rl.append(VppIpRoute(cls, "0.0.0.0", 0,
192 [VppRoutePath("0.0.0.0", 0xffffffff,
194 register=False, table_id=1))
195 rl.append(VppIpRoute(cls, "0.0.0.0", 0,
196 [VppRoutePath(cls.pg1.local_ip4,
197 cls.pg1.sw_if_index)],
199 rl.append(VppIpRoute(cls, cls.pg5.remote_ip4, 32,
200 [VppRoutePath("0.0.0.0",
201 cls.pg5.sw_if_index)],
202 register=False, table_id=1))
203 rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 32,
204 [VppRoutePath("0.0.0.0",
205 cls.pg6.sw_if_index)],
206 register=False, table_id=1))
207 rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 16,
208 [VppRoutePath("0.0.0.0", 0xffffffff,
210 register=False, table_id=0))
215 def get_err_counter(self, path):
216 return self.statistics.get_err_counter(path)
218 def reass_hairpinning(self, server_addr, server_in_port, server_out_port,
219 host_in_port, proto=IP_PROTOS.tcp,
221 layer = self.proto2layer(proto)
223 if proto == IP_PROTOS.tcp:
224 data = b"A" * 4 + b"B" * 16 + b"C" * 3
226 data = b"A" * 16 + b"B" * 16 + b"C" * 3
228 # send packet from host to server
229 pkts = self.create_stream_frag(self.pg0,
235 self.pg0.add_stream(pkts)
236 self.pg_enable_capture(self.pg_interfaces)
238 frags = self.pg0.get_capture(len(pkts))
239 p = self.reass_frags_and_verify(frags,
242 if proto != IP_PROTOS.icmp:
244 self.assertNotEqual(p[layer].sport, host_in_port)
245 self.assertEqual(p[layer].dport, server_in_port)
248 self.assertNotEqual(p[layer].id, host_in_port)
249 self.assertEqual(data, p[Raw].load)
251 def frag_out_of_order(self, proto=IP_PROTOS.tcp, dont_translate=False,
253 layer = self.proto2layer(proto)
255 if proto == IP_PROTOS.tcp:
256 data = b"A" * 4 + b"B" * 16 + b"C" * 3
258 data = b"A" * 16 + b"B" * 16 + b"C" * 3
259 self.port_in = self.random_port()
263 pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4,
264 self.port_in, 20, data, proto)
266 self.pg0.add_stream(pkts)
267 self.pg_enable_capture(self.pg_interfaces)
269 frags = self.pg1.get_capture(len(pkts))
270 if not dont_translate:
271 p = self.reass_frags_and_verify(frags,
275 p = self.reass_frags_and_verify(frags,
278 if proto != IP_PROTOS.icmp:
279 if not dont_translate:
280 self.assertEqual(p[layer].dport, 20)
282 self.assertNotEqual(p[layer].sport, self.port_in)
284 self.assertEqual(p[layer].sport, self.port_in)
287 if not dont_translate:
288 self.assertNotEqual(p[layer].id, self.port_in)
290 self.assertEqual(p[layer].id, self.port_in)
291 self.assertEqual(data, p[Raw].load)
294 if not dont_translate:
295 dst_addr = self.nat_addr
297 dst_addr = self.pg0.remote_ip4
298 if proto != IP_PROTOS.icmp:
300 dport = p[layer].sport
304 pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport,
305 data, proto, echo_reply=True)
307 self.pg1.add_stream(pkts)
308 self.pg_enable_capture(self.pg_interfaces)
309 self.logger.info(self.vapi.cli("show trace"))
311 frags = self.pg0.get_capture(len(pkts))
312 p = self.reass_frags_and_verify(frags,
315 if proto != IP_PROTOS.icmp:
316 self.assertEqual(p[layer].sport, 20)
317 self.assertEqual(p[layer].dport, self.port_in)
319 self.assertEqual(p[layer].id, self.port_in)
320 self.assertEqual(data, p[Raw].load)
322 def reass_frags_and_verify(self, frags, src, dst):
325 self.assertEqual(p[IP].src, src)
326 self.assertEqual(p[IP].dst, dst)
327 self.assert_ip_checksum_valid(p)
328 buffer.seek(p[IP].frag * 8)
329 buffer.write(bytes(p[IP].payload))
330 ip = IP(src=frags[0][IP].src, dst=frags[0][IP].dst,
331 proto=frags[0][IP].proto)
332 if ip.proto == IP_PROTOS.tcp:
333 p = (ip / TCP(buffer.getvalue()))
334 self.logger.debug(ppp("Reassembled:", p))
335 self.assert_tcp_checksum_valid(p)
336 elif ip.proto == IP_PROTOS.udp:
337 p = (ip / UDP(buffer.getvalue()[:8]) /
338 Raw(buffer.getvalue()[8:]))
339 elif ip.proto == IP_PROTOS.icmp:
340 p = (ip / ICMP(buffer.getvalue()))
343 def frag_in_order(self, proto=IP_PROTOS.tcp, dont_translate=False,
345 layer = self.proto2layer(proto)
347 if proto == IP_PROTOS.tcp:
348 data = b"A" * 4 + b"B" * 16 + b"C" * 3
350 data = b"A" * 16 + b"B" * 16 + b"C" * 3
351 self.port_in = self.random_port()
354 pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4,
355 self.port_in, 20, data, proto)
356 self.pg0.add_stream(pkts)
357 self.pg_enable_capture(self.pg_interfaces)
359 frags = self.pg1.get_capture(len(pkts))
360 if not dont_translate:
361 p = self.reass_frags_and_verify(frags,
365 p = self.reass_frags_and_verify(frags,
368 if proto != IP_PROTOS.icmp:
369 if not dont_translate:
370 self.assertEqual(p[layer].dport, 20)
372 self.assertNotEqual(p[layer].sport, self.port_in)
374 self.assertEqual(p[layer].sport, self.port_in)
377 if not dont_translate:
378 self.assertNotEqual(p[layer].id, self.port_in)
380 self.assertEqual(p[layer].id, self.port_in)
381 self.assertEqual(data, p[Raw].load)
384 if not dont_translate:
385 dst_addr = self.nat_addr
387 dst_addr = self.pg0.remote_ip4
388 if proto != IP_PROTOS.icmp:
390 dport = p[layer].sport
394 pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport, data,
395 proto, echo_reply=True)
396 self.pg1.add_stream(pkts)
397 self.pg_enable_capture(self.pg_interfaces)
399 frags = self.pg0.get_capture(len(pkts))
400 p = self.reass_frags_and_verify(frags,
403 if proto != IP_PROTOS.icmp:
404 self.assertEqual(p[layer].sport, 20)
405 self.assertEqual(p[layer].dport, self.port_in)
407 self.assertEqual(p[layer].id, self.port_in)
408 self.assertEqual(data, p[Raw].load)
410 def verify_capture_out(self, capture, nat_ip=None, same_port=False,
411 dst_ip=None, ignore_port=False):
413 nat_ip = self.nat_addr
414 for packet in capture:
416 self.assert_packet_checksums_valid(packet)
417 self.assertEqual(packet[IP].src, nat_ip)
418 if dst_ip is not None:
419 self.assertEqual(packet[IP].dst, dst_ip)
420 if packet.haslayer(TCP):
424 packet[TCP].sport, self.tcp_port_in)
427 packet[TCP].sport, self.tcp_port_in)
428 self.tcp_port_out = packet[TCP].sport
429 self.assert_packet_checksums_valid(packet)
430 elif packet.haslayer(UDP):
434 packet[UDP].sport, self.udp_port_in)
437 packet[UDP].sport, self.udp_port_in)
438 self.udp_port_out = packet[UDP].sport
443 packet[ICMP].id, self.icmp_id_in)
446 packet[ICMP].id, self.icmp_id_in)
447 self.icmp_id_out = packet[ICMP].id
448 self.assert_packet_checksums_valid(packet)
450 self.logger.error(ppp("Unexpected or invalid packet "
451 "(outside network):", packet))
454 def verify_capture_in(self, capture, in_if):
455 for packet in capture:
457 self.assert_packet_checksums_valid(packet)
458 self.assertEqual(packet[IP].dst, in_if.remote_ip4)
459 if packet.haslayer(TCP):
460 self.assertEqual(packet[TCP].dport, self.tcp_port_in)
461 elif packet.haslayer(UDP):
462 self.assertEqual(packet[UDP].dport, self.udp_port_in)
464 self.assertEqual(packet[ICMP].id, self.icmp_id_in)
466 self.logger.error(ppp("Unexpected or invalid packet "
467 "(inside network):", packet))
470 def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64):
472 dst_ip = out_if.remote_ip4
476 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
477 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
478 TCP(sport=self.tcp_port_in, dport=20))
482 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
483 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
484 UDP(sport=self.udp_port_in, dport=20))
488 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
489 IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
490 ICMP(id=self.icmp_id_in, type='echo-request'))
495 def create_stream_out(self, out_if, dst_ip=None, ttl=64,
496 use_inside_ports=False):
498 dst_ip = self.nat_addr
499 if not use_inside_ports:
500 tcp_port = self.tcp_port_out
501 udp_port = self.udp_port_out
502 icmp_id = self.icmp_id_out
504 tcp_port = self.tcp_port_in
505 udp_port = self.udp_port_in
506 icmp_id = self.icmp_id_in
509 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
510 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
511 TCP(dport=tcp_port, sport=20))
515 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
516 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
517 UDP(dport=udp_port, sport=20))
521 p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
522 IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
523 ICMP(id=icmp_id, type='echo-reply'))
528 def create_tcp_stream(self, in_if, out_if, count):
532 for i in range(count):
533 p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
534 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=64) /
535 TCP(sport=port + i, dport=20))
540 def create_stream_frag(self, src_if, dst, sport, dport, data,
541 proto=IP_PROTOS.tcp, echo_reply=False):
542 if proto == IP_PROTOS.tcp:
543 p = (IP(src=src_if.remote_ip4, dst=dst) /
544 TCP(sport=sport, dport=dport) /
546 p = p.__class__(scapy.compat.raw(p))
547 chksum = p[TCP].chksum
548 proto_header = TCP(sport=sport, dport=dport, chksum=chksum)
549 elif proto == IP_PROTOS.udp:
550 proto_header = UDP(sport=sport, dport=dport)
551 elif proto == IP_PROTOS.icmp:
553 proto_header = ICMP(id=sport, type='echo-request')
555 proto_header = ICMP(id=sport, type='echo-reply')
557 raise Exception("Unsupported protocol")
558 id = self.random_port()
560 if proto == IP_PROTOS.tcp:
563 raw = Raw(data[0:16])
564 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
565 IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=0, id=id) /
569 if proto == IP_PROTOS.tcp:
570 raw = Raw(data[4:20])
572 raw = Raw(data[16:32])
573 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
574 IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=3, id=id,
578 if proto == IP_PROTOS.tcp:
582 p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
583 IP(src=src_if.remote_ip4, dst=dst, frag=5, proto=proto,
589 def frag_in_order_in_plus_out(self, in_addr, out_addr, in_port, out_port,
590 proto=IP_PROTOS.tcp):
592 layer = self.proto2layer(proto)
594 if proto == IP_PROTOS.tcp:
595 data = b"A" * 4 + b"B" * 16 + b"C" * 3
597 data = b"A" * 16 + b"B" * 16 + b"C" * 3
598 port_in = self.random_port()
602 pkts = self.create_stream_frag(self.pg0, out_addr,
605 self.pg0.add_stream(pkts)
606 self.pg_enable_capture(self.pg_interfaces)
608 frags = self.pg1.get_capture(len(pkts))
609 p = self.reass_frags_and_verify(frags,
612 if proto != IP_PROTOS.icmp:
613 self.assertEqual(p[layer].sport, port_in)
614 self.assertEqual(p[layer].dport, in_port)
616 self.assertEqual(p[layer].id, port_in)
617 self.assertEqual(data, p[Raw].load)
620 if proto != IP_PROTOS.icmp:
621 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
623 p[layer].sport, data, proto)
625 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
626 p[layer].id, 0, data, proto,
628 self.pg1.add_stream(pkts)
629 self.pg_enable_capture(self.pg_interfaces)
631 frags = self.pg0.get_capture(len(pkts))
632 p = self.reass_frags_and_verify(frags,
635 if proto != IP_PROTOS.icmp:
636 self.assertEqual(p[layer].sport, out_port)
637 self.assertEqual(p[layer].dport, port_in)
639 self.assertEqual(p[layer].id, port_in)
640 self.assertEqual(data, p[Raw].load)
642 def frag_out_of_order_in_plus_out(self, in_addr, out_addr, in_port,
643 out_port, proto=IP_PROTOS.tcp):
645 layer = self.proto2layer(proto)
647 if proto == IP_PROTOS.tcp:
648 data = b"A" * 4 + b"B" * 16 + b"C" * 3
650 data = b"A" * 16 + b"B" * 16 + b"C" * 3
651 port_in = self.random_port()
655 pkts = self.create_stream_frag(self.pg0, out_addr,
659 self.pg0.add_stream(pkts)
660 self.pg_enable_capture(self.pg_interfaces)
662 frags = self.pg1.get_capture(len(pkts))
663 p = self.reass_frags_and_verify(frags,
666 if proto != IP_PROTOS.icmp:
667 self.assertEqual(p[layer].dport, in_port)
668 self.assertEqual(p[layer].sport, port_in)
669 self.assertEqual(p[layer].dport, in_port)
671 self.assertEqual(p[layer].id, port_in)
672 self.assertEqual(data, p[Raw].load)
675 if proto != IP_PROTOS.icmp:
676 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
678 p[layer].sport, data, proto)
680 pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4,
681 p[layer].id, 0, data, proto,
684 self.pg1.add_stream(pkts)
685 self.pg_enable_capture(self.pg_interfaces)
687 frags = self.pg0.get_capture(len(pkts))
688 p = self.reass_frags_and_verify(frags,
691 if proto != IP_PROTOS.icmp:
692 self.assertEqual(p[layer].sport, out_port)
693 self.assertEqual(p[layer].dport, port_in)
695 self.assertEqual(p[layer].id, port_in)
696 self.assertEqual(data, p[Raw].load)
698 def init_tcp_session(self, in_if, out_if, in_port, ext_port):
700 p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
701 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
702 TCP(sport=in_port, dport=ext_port, flags="S"))
704 self.pg_enable_capture(self.pg_interfaces)
706 capture = out_if.get_capture(1)
708 out_port = p[TCP].sport
710 # SYN + ACK packet out->in
711 p = (Ether(src=out_if.remote_mac, dst=out_if.local_mac) /
712 IP(src=out_if.remote_ip4, dst=self.nat_addr) /
713 TCP(sport=ext_port, dport=out_port, flags="SA"))
715 self.pg_enable_capture(self.pg_interfaces)
720 p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
721 IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
722 TCP(sport=in_port, dport=ext_port, flags="A"))
724 self.pg_enable_capture(self.pg_interfaces)
726 out_if.get_capture(1)
730 def twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False,
732 twice_nat_addr = '10.0.1.3'
740 port_in1 = port_in + 1
741 port_in2 = port_in + 2
746 server1 = self.pg0.remote_hosts[0]
747 server2 = self.pg0.remote_hosts[1]
759 eh_translate = ((not self_twice_nat) or (not lb and same_pg) or
762 self.nat_add_address(self.nat_addr)
763 self.nat_add_address(twice_nat_addr, twice_nat=1)
767 flags |= self.config_flags.NAT_IS_SELF_TWICE_NAT
769 flags |= self.config_flags.NAT_IS_TWICE_NAT
772 self.nat_add_static_mapping(pg0.remote_ip4, self.nat_addr,
777 locals = [{'addr': server1.ip4,
781 {'addr': server2.ip4,
785 out_addr = self.nat_addr
787 self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags,
788 external_addr=out_addr,
789 external_port=port_out,
790 protocol=IP_PROTOS.tcp,
791 local_num=len(locals),
793 self.nat_add_inside_interface(pg0)
794 self.nat_add_outside_interface(pg1)
800 assert client_id is not None
802 client = self.pg0.remote_hosts[0]
804 client = self.pg0.remote_hosts[1]
806 client = pg1.remote_hosts[0]
807 p = (Ether(src=pg1.remote_mac, dst=pg1.local_mac) /
808 IP(src=client.ip4, dst=self.nat_addr) /
809 TCP(sport=eh_port_out, dport=port_out))
811 self.pg_enable_capture(self.pg_interfaces)
813 capture = pg0.get_capture(1)
819 if ip.dst == server1.ip4:
825 self.assertEqual(ip.dst, server.ip4)
827 self.assertIn(tcp.dport, [port_in1, port_in2])
829 self.assertEqual(tcp.dport, port_in)
831 self.assertEqual(ip.src, twice_nat_addr)
832 self.assertNotEqual(tcp.sport, eh_port_out)
834 self.assertEqual(ip.src, client.ip4)
835 self.assertEqual(tcp.sport, eh_port_out)
837 eh_port_in = tcp.sport
838 saved_port_in = tcp.dport
839 self.assert_packet_checksums_valid(p)
841 self.logger.error(ppp("Unexpected or invalid packet:", p))
844 p = (Ether(src=server.mac, dst=pg0.local_mac) /
845 IP(src=server.ip4, dst=eh_addr_in) /
846 TCP(sport=saved_port_in, dport=eh_port_in))
848 self.pg_enable_capture(self.pg_interfaces)
850 capture = pg1.get_capture(1)
855 self.assertEqual(ip.dst, client.ip4)
856 self.assertEqual(ip.src, self.nat_addr)
857 self.assertEqual(tcp.dport, eh_port_out)
858 self.assertEqual(tcp.sport, port_out)
859 self.assert_packet_checksums_valid(p)
861 self.logger.error(ppp("Unexpected or invalid packet:", p))
865 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
866 self.assertEqual(len(sessions), 1)
867 self.assertTrue(sessions[0].flags &
868 self.config_flags.NAT_IS_EXT_HOST_VALID)
869 self.assertTrue(sessions[0].flags &
870 self.config_flags.NAT_IS_TWICE_NAT)
871 self.logger.info(self.vapi.cli("show nat44 sessions"))
872 self.vapi.nat44_del_session(
873 address=sessions[0].inside_ip_address,
874 port=sessions[0].inside_port,
875 protocol=sessions[0].protocol,
876 flags=(self.config_flags.NAT_IS_INSIDE |
877 self.config_flags.NAT_IS_EXT_HOST_VALID),
878 ext_host_address=sessions[0].ext_host_nat_address,
879 ext_host_port=sessions[0].ext_host_nat_port)
880 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
881 self.assertEqual(len(sessions), 0)
883 def verify_syslog_sess(self, data, is_add=True, is_ip6=False):
884 message = data.decode('utf-8')
886 message = SyslogMessage.parse(message)
887 except ParseError as e:
891 self.assertEqual(message.severity, SyslogSeverity.info)
892 self.assertEqual(message.appname, 'NAT')
893 self.assertEqual(message.msgid, 'SADD' if is_add else 'SDEL')
894 sd_params = message.sd.get('nsess')
895 self.assertTrue(sd_params is not None)
897 self.assertEqual(sd_params.get('IATYP'), 'IPv6')
898 self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip6)
900 self.assertEqual(sd_params.get('IATYP'), 'IPv4')
901 self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4)
902 self.assertTrue(sd_params.get('SSUBIX') is not None)
903 self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in)
904 self.assertEqual(sd_params.get('XATYP'), 'IPv4')
905 self.assertEqual(sd_params.get('XSADDR'), self.nat_addr)
906 self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out)
907 self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp)
908 self.assertEqual(sd_params.get('SVLAN'), '0')
909 self.assertEqual(sd_params.get('XDADDR'), self.pg1.remote_ip4)
910 self.assertEqual(sd_params.get('XDPORT'),
911 "%d" % self.tcp_external_port)
914 class TestNAT44ED(NAT44EDTestCase):
915 """ NAT44ED Test Case """
917 def test_users_dump(self):
918 """ NAT44ED API test - nat44_user_dump """
920 self.nat_add_address(self.nat_addr)
921 self.nat_add_inside_interface(self.pg0)
922 self.nat_add_outside_interface(self.pg1)
924 self.vapi.nat44_forwarding_enable_disable(enable=1)
926 local_ip = self.pg0.remote_ip4
927 external_ip = self.nat_addr
928 self.nat_add_static_mapping(local_ip, external_ip)
930 users = self.vapi.nat44_user_dump()
931 self.assertEqual(len(users), 0)
933 # in2out - static mapping match
935 pkts = self.create_stream_out(self.pg1)
936 self.pg1.add_stream(pkts)
937 self.pg_enable_capture(self.pg_interfaces)
939 capture = self.pg0.get_capture(len(pkts))
940 self.verify_capture_in(capture, self.pg0)
942 pkts = self.create_stream_in(self.pg0, self.pg1)
943 self.pg0.add_stream(pkts)
944 self.pg_enable_capture(self.pg_interfaces)
946 capture = self.pg1.get_capture(len(pkts))
947 self.verify_capture_out(capture, same_port=True)
949 users = self.vapi.nat44_user_dump()
950 self.assertEqual(len(users), 1)
951 static_user = users[0]
952 self.assertEqual(static_user.nstaticsessions, 3)
953 self.assertEqual(static_user.nsessions, 0)
955 # in2out - no static mapping match (forwarding test)
957 host0 = self.pg0.remote_hosts[0]
958 self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
960 pkts = self.create_stream_out(self.pg1,
961 dst_ip=self.pg0.remote_ip4,
962 use_inside_ports=True)
963 self.pg1.add_stream(pkts)
964 self.pg_enable_capture(self.pg_interfaces)
966 capture = self.pg0.get_capture(len(pkts))
967 self.verify_capture_in(capture, self.pg0)
969 pkts = self.create_stream_in(self.pg0, self.pg1)
970 self.pg0.add_stream(pkts)
971 self.pg_enable_capture(self.pg_interfaces)
973 capture = self.pg1.get_capture(len(pkts))
974 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
977 self.pg0.remote_hosts[0] = host0
979 users = self.vapi.nat44_user_dump()
980 self.assertEqual(len(users), 2)
981 if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4:
982 non_static_user = users[1]
983 static_user = users[0]
985 non_static_user = users[0]
986 static_user = users[1]
987 self.assertEqual(static_user.nstaticsessions, 3)
988 self.assertEqual(static_user.nsessions, 0)
989 self.assertEqual(non_static_user.nstaticsessions, 0)
990 self.assertEqual(non_static_user.nsessions, 3)
992 users = self.vapi.nat44_user_dump()
993 self.assertEqual(len(users), 2)
994 if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4:
995 non_static_user = users[1]
996 static_user = users[0]
998 non_static_user = users[0]
999 static_user = users[1]
1000 self.assertEqual(static_user.nstaticsessions, 3)
1001 self.assertEqual(static_user.nsessions, 0)
1002 self.assertEqual(non_static_user.nstaticsessions, 0)
1003 self.assertEqual(non_static_user.nsessions, 3)
1005 def test_frag_out_of_order_do_not_translate(self):
1006 """ NAT44ED don't translate fragments arriving out of order """
1007 self.nat_add_inside_interface(self.pg0)
1008 self.nat_add_outside_interface(self.pg1)
1009 self.vapi.nat44_forwarding_enable_disable(enable=True)
1010 self.frag_out_of_order(proto=IP_PROTOS.tcp, dont_translate=True)
1012 def test_forwarding(self):
1013 """ NAT44ED forwarding test """
1015 self.nat_add_inside_interface(self.pg0)
1016 self.nat_add_outside_interface(self.pg1)
1017 self.vapi.nat44_forwarding_enable_disable(enable=1)
1019 real_ip = self.pg0.remote_ip4
1020 alias_ip = self.nat_addr
1021 flags = self.config_flags.NAT_IS_ADDR_ONLY
1022 self.vapi.nat44_add_del_static_mapping(is_add=1,
1023 local_ip_address=real_ip,
1024 external_ip_address=alias_ip,
1025 external_sw_if_index=0xFFFFFFFF,
1029 # in2out - static mapping match
1031 pkts = self.create_stream_out(self.pg1)
1032 self.pg1.add_stream(pkts)
1033 self.pg_enable_capture(self.pg_interfaces)
1035 capture = self.pg0.get_capture(len(pkts))
1036 self.verify_capture_in(capture, self.pg0)
1038 pkts = self.create_stream_in(self.pg0, self.pg1)
1039 self.pg0.add_stream(pkts)
1040 self.pg_enable_capture(self.pg_interfaces)
1042 capture = self.pg1.get_capture(len(pkts))
1043 self.verify_capture_out(capture, same_port=True)
1045 # in2out - no static mapping match
1047 host0 = self.pg0.remote_hosts[0]
1048 self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
1050 pkts = self.create_stream_out(self.pg1,
1051 dst_ip=self.pg0.remote_ip4,
1052 use_inside_ports=True)
1053 self.pg1.add_stream(pkts)
1054 self.pg_enable_capture(self.pg_interfaces)
1056 capture = self.pg0.get_capture(len(pkts))
1057 self.verify_capture_in(capture, self.pg0)
1059 pkts = self.create_stream_in(self.pg0, self.pg1)
1060 self.pg0.add_stream(pkts)
1061 self.pg_enable_capture(self.pg_interfaces)
1063 capture = self.pg1.get_capture(len(pkts))
1064 self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
1067 self.pg0.remote_hosts[0] = host0
1069 user = self.pg0.remote_hosts[1]
1070 sessions = self.vapi.nat44_user_session_dump(user.ip4, 0)
1071 self.assertEqual(len(sessions), 3)
1072 self.assertTrue(sessions[0].flags &
1073 self.config_flags.NAT_IS_EXT_HOST_VALID)
1074 self.vapi.nat44_del_session(
1075 address=sessions[0].inside_ip_address,
1076 port=sessions[0].inside_port,
1077 protocol=sessions[0].protocol,
1078 flags=(self.config_flags.NAT_IS_INSIDE |
1079 self.config_flags.NAT_IS_EXT_HOST_VALID),
1080 ext_host_address=sessions[0].ext_host_address,
1081 ext_host_port=sessions[0].ext_host_port)
1082 sessions = self.vapi.nat44_user_session_dump(user.ip4, 0)
1083 self.assertEqual(len(sessions), 2)
1086 self.vapi.nat44_forwarding_enable_disable(enable=0)
1087 flags = self.config_flags.NAT_IS_ADDR_ONLY
1088 self.vapi.nat44_add_del_static_mapping(
1090 local_ip_address=real_ip,
1091 external_ip_address=alias_ip,
1092 external_sw_if_index=0xFFFFFFFF,
1095 def test_output_feature_and_service2(self):
1096 """ NAT44ED interface output feature and service host direct access """
1097 self.vapi.nat44_forwarding_enable_disable(enable=1)
1098 self.nat_add_address(self.nat_addr)
1100 self.vapi.nat44_interface_add_del_output_feature(
1101 sw_if_index=self.pg1.sw_if_index, is_add=1,)
1103 # session initiated from service host - translate
1104 pkts = self.create_stream_in(self.pg0, self.pg1)
1105 self.pg0.add_stream(pkts)
1106 self.pg_enable_capture(self.pg_interfaces)
1108 capture = self.pg1.get_capture(len(pkts))
1109 self.verify_capture_out(capture, ignore_port=True)
1111 pkts = self.create_stream_out(self.pg1)
1112 self.pg1.add_stream(pkts)
1113 self.pg_enable_capture(self.pg_interfaces)
1115 capture = self.pg0.get_capture(len(pkts))
1116 self.verify_capture_in(capture, self.pg0)
1118 # session initiated from remote host - do not translate
1119 tcp_port_in = self.tcp_port_in
1120 udp_port_in = self.udp_port_in
1121 icmp_id_in = self.icmp_id_in
1123 self.tcp_port_in = 60303
1124 self.udp_port_in = 60304
1125 self.icmp_id_in = 60305
1128 pkts = self.create_stream_out(self.pg1,
1129 self.pg0.remote_ip4,
1130 use_inside_ports=True)
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, nat_ip=self.pg0.remote_ip4,
1145 self.tcp_port_in = tcp_port_in
1146 self.udp_port_in = udp_port_in
1147 self.icmp_id_in = icmp_id_in
1149 def test_twice_nat(self):
1150 """ NAT44ED Twice NAT """
1151 self.twice_nat_common()
1153 def test_self_twice_nat_positive(self):
1154 """ NAT44ED Self Twice NAT (positive test) """
1155 self.twice_nat_common(self_twice_nat=True, same_pg=True)
1157 def test_self_twice_nat_lb_positive(self):
1158 """ NAT44ED Self Twice NAT local service load balancing (positive test)
1160 self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True,
1163 def test_twice_nat_lb(self):
1164 """ NAT44ED Twice NAT local service load balancing """
1165 self.twice_nat_common(lb=True)
1167 def test_output_feature(self):
1168 """ NAT44ED interface output feature (in2out postrouting) """
1169 self.vapi.nat44_forwarding_enable_disable(enable=1)
1170 self.nat_add_address(self.nat_addr)
1172 self.nat_add_outside_interface(self.pg0)
1173 self.vapi.nat44_interface_add_del_output_feature(
1174 sw_if_index=self.pg1.sw_if_index, is_add=1)
1177 pkts = self.create_stream_in(self.pg0, self.pg1)
1178 self.pg0.add_stream(pkts)
1179 self.pg_enable_capture(self.pg_interfaces)
1181 capture = self.pg1.get_capture(len(pkts))
1182 self.verify_capture_out(capture, ignore_port=True)
1185 pkts = self.create_stream_out(self.pg1)
1186 self.pg1.add_stream(pkts)
1187 self.pg_enable_capture(self.pg_interfaces)
1189 capture = self.pg0.get_capture(len(pkts))
1190 self.verify_capture_in(capture, self.pg0)
1192 def test_static_with_port_out2(self):
1193 """ NAT44ED 1:1 NAPT asymmetrical rule """
1198 self.vapi.nat44_forwarding_enable_disable(enable=1)
1199 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1200 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
1201 local_port, external_port,
1202 proto=IP_PROTOS.tcp, flags=flags)
1204 self.nat_add_inside_interface(self.pg0)
1205 self.nat_add_outside_interface(self.pg1)
1207 # from client to service
1208 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1209 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1210 TCP(sport=12345, dport=external_port))
1211 self.pg1.add_stream(p)
1212 self.pg_enable_capture(self.pg_interfaces)
1214 capture = self.pg0.get_capture(1)
1219 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1220 self.assertEqual(tcp.dport, local_port)
1221 self.assert_packet_checksums_valid(p)
1223 self.logger.error(ppp("Unexpected or invalid packet:", p))
1227 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
1228 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1229 ICMP(type=11) / capture[0][IP])
1230 self.pg0.add_stream(p)
1231 self.pg_enable_capture(self.pg_interfaces)
1233 capture = self.pg1.get_capture(1)
1236 self.assertEqual(p[IP].src, self.nat_addr)
1238 self.assertEqual(inner.dst, self.nat_addr)
1239 self.assertEqual(inner[TCPerror].dport, external_port)
1241 self.logger.error(ppp("Unexpected or invalid packet:", p))
1244 # from service back to client
1245 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1246 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1247 TCP(sport=local_port, dport=12345))
1248 self.pg0.add_stream(p)
1249 self.pg_enable_capture(self.pg_interfaces)
1251 capture = self.pg1.get_capture(1)
1256 self.assertEqual(ip.src, self.nat_addr)
1257 self.assertEqual(tcp.sport, external_port)
1258 self.assert_packet_checksums_valid(p)
1260 self.logger.error(ppp("Unexpected or invalid packet:", p))
1264 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1265 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1266 ICMP(type=11) / capture[0][IP])
1267 self.pg1.add_stream(p)
1268 self.pg_enable_capture(self.pg_interfaces)
1270 capture = self.pg0.get_capture(1)
1273 self.assertEqual(p[IP].dst, self.pg0.remote_ip4)
1275 self.assertEqual(inner.src, self.pg0.remote_ip4)
1276 self.assertEqual(inner[TCPerror].sport, local_port)
1278 self.logger.error(ppp("Unexpected or invalid packet:", p))
1281 # from client to server (no translation)
1282 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1283 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
1284 TCP(sport=12346, dport=local_port))
1285 self.pg1.add_stream(p)
1286 self.pg_enable_capture(self.pg_interfaces)
1288 capture = self.pg0.get_capture(1)
1293 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1294 self.assertEqual(tcp.dport, local_port)
1295 self.assert_packet_checksums_valid(p)
1297 self.logger.error(ppp("Unexpected or invalid packet:", p))
1300 # from service back to client (no translation)
1301 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1302 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
1303 TCP(sport=local_port, dport=12346))
1304 self.pg0.add_stream(p)
1305 self.pg_enable_capture(self.pg_interfaces)
1307 capture = self.pg1.get_capture(1)
1312 self.assertEqual(ip.src, self.pg0.remote_ip4)
1313 self.assertEqual(tcp.sport, local_port)
1314 self.assert_packet_checksums_valid(p)
1316 self.logger.error(ppp("Unexpected or invalid packet:", p))
1319 def test_static_lb(self):
1320 """ NAT44ED local service load balancing """
1321 external_addr_n = self.nat_addr
1324 server1 = self.pg0.remote_hosts[0]
1325 server2 = self.pg0.remote_hosts[1]
1327 locals = [{'addr': server1.ip4,
1331 {'addr': server2.ip4,
1336 self.nat_add_address(self.nat_addr)
1337 self.vapi.nat44_add_del_lb_static_mapping(
1339 external_addr=external_addr_n,
1340 external_port=external_port,
1341 protocol=IP_PROTOS.tcp,
1342 local_num=len(locals),
1344 flags = self.config_flags.NAT_IS_INSIDE
1345 self.vapi.nat44_interface_add_del_feature(
1346 sw_if_index=self.pg0.sw_if_index,
1347 flags=flags, is_add=1)
1348 self.vapi.nat44_interface_add_del_feature(
1349 sw_if_index=self.pg1.sw_if_index,
1352 # from client to service
1353 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1354 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1355 TCP(sport=12345, dport=external_port))
1356 self.pg1.add_stream(p)
1357 self.pg_enable_capture(self.pg_interfaces)
1359 capture = self.pg0.get_capture(1)
1365 self.assertIn(ip.dst, [server1.ip4, server2.ip4])
1366 if ip.dst == server1.ip4:
1370 self.assertEqual(tcp.dport, local_port)
1371 self.assert_packet_checksums_valid(p)
1373 self.logger.error(ppp("Unexpected or invalid packet:", p))
1376 # from service back to client
1377 p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
1378 IP(src=server.ip4, dst=self.pg1.remote_ip4) /
1379 TCP(sport=local_port, dport=12345))
1380 self.pg0.add_stream(p)
1381 self.pg_enable_capture(self.pg_interfaces)
1383 capture = self.pg1.get_capture(1)
1388 self.assertEqual(ip.src, self.nat_addr)
1389 self.assertEqual(tcp.sport, external_port)
1390 self.assert_packet_checksums_valid(p)
1392 self.logger.error(ppp("Unexpected or invalid packet:", p))
1395 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
1396 self.assertEqual(len(sessions), 1)
1397 self.assertTrue(sessions[0].flags &
1398 self.config_flags.NAT_IS_EXT_HOST_VALID)
1399 self.vapi.nat44_del_session(
1400 address=sessions[0].inside_ip_address,
1401 port=sessions[0].inside_port,
1402 protocol=sessions[0].protocol,
1403 flags=(self.config_flags.NAT_IS_INSIDE |
1404 self.config_flags.NAT_IS_EXT_HOST_VALID),
1405 ext_host_address=sessions[0].ext_host_address,
1406 ext_host_port=sessions[0].ext_host_port)
1407 sessions = self.vapi.nat44_user_session_dump(server.ip4, 0)
1408 self.assertEqual(len(sessions), 0)
1410 def test_static_lb_2(self):
1411 """ NAT44ED local service load balancing (asymmetrical rule) """
1412 external_addr = self.nat_addr
1415 server1 = self.pg0.remote_hosts[0]
1416 server2 = self.pg0.remote_hosts[1]
1418 locals = [{'addr': server1.ip4,
1422 {'addr': server2.ip4,
1427 self.vapi.nat44_forwarding_enable_disable(enable=1)
1428 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1429 self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags,
1430 external_addr=external_addr,
1431 external_port=external_port,
1432 protocol=IP_PROTOS.tcp,
1433 local_num=len(locals),
1435 flags = self.config_flags.NAT_IS_INSIDE
1436 self.vapi.nat44_interface_add_del_feature(
1437 sw_if_index=self.pg0.sw_if_index,
1438 flags=flags, is_add=1)
1439 self.vapi.nat44_interface_add_del_feature(
1440 sw_if_index=self.pg1.sw_if_index,
1443 # from client to service
1444 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1445 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1446 TCP(sport=12345, dport=external_port))
1447 self.pg1.add_stream(p)
1448 self.pg_enable_capture(self.pg_interfaces)
1450 capture = self.pg0.get_capture(1)
1456 self.assertIn(ip.dst, [server1.ip4, server2.ip4])
1457 if ip.dst == server1.ip4:
1461 self.assertEqual(tcp.dport, local_port)
1462 self.assert_packet_checksums_valid(p)
1464 self.logger.error(ppp("Unexpected or invalid packet:", p))
1467 # from service back to client
1468 p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
1469 IP(src=server.ip4, dst=self.pg1.remote_ip4) /
1470 TCP(sport=local_port, dport=12345))
1471 self.pg0.add_stream(p)
1472 self.pg_enable_capture(self.pg_interfaces)
1474 capture = self.pg1.get_capture(1)
1479 self.assertEqual(ip.src, self.nat_addr)
1480 self.assertEqual(tcp.sport, external_port)
1481 self.assert_packet_checksums_valid(p)
1483 self.logger.error(ppp("Unexpected or invalid packet:", p))
1486 # from client to server (no translation)
1487 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1488 IP(src=self.pg1.remote_ip4, dst=server1.ip4) /
1489 TCP(sport=12346, dport=local_port))
1490 self.pg1.add_stream(p)
1491 self.pg_enable_capture(self.pg_interfaces)
1493 capture = self.pg0.get_capture(1)
1499 self.assertEqual(ip.dst, server1.ip4)
1500 self.assertEqual(tcp.dport, local_port)
1501 self.assert_packet_checksums_valid(p)
1503 self.logger.error(ppp("Unexpected or invalid packet:", p))
1506 # from service back to client (no translation)
1507 p = (Ether(src=server1.mac, dst=self.pg0.local_mac) /
1508 IP(src=server1.ip4, dst=self.pg1.remote_ip4) /
1509 TCP(sport=local_port, dport=12346))
1510 self.pg0.add_stream(p)
1511 self.pg_enable_capture(self.pg_interfaces)
1513 capture = self.pg1.get_capture(1)
1518 self.assertEqual(ip.src, server1.ip4)
1519 self.assertEqual(tcp.sport, local_port)
1520 self.assert_packet_checksums_valid(p)
1522 self.logger.error(ppp("Unexpected or invalid packet:", p))
1525 def test_lb_affinity(self):
1526 """ NAT44ED local service load balancing affinity """
1527 external_addr = self.nat_addr
1530 server1 = self.pg0.remote_hosts[0]
1531 server2 = self.pg0.remote_hosts[1]
1533 locals = [{'addr': server1.ip4,
1537 {'addr': server2.ip4,
1542 self.nat_add_address(self.nat_addr)
1543 self.vapi.nat44_add_del_lb_static_mapping(is_add=1,
1544 external_addr=external_addr,
1545 external_port=external_port,
1546 protocol=IP_PROTOS.tcp,
1548 local_num=len(locals),
1550 flags = self.config_flags.NAT_IS_INSIDE
1551 self.vapi.nat44_interface_add_del_feature(
1552 sw_if_index=self.pg0.sw_if_index,
1553 flags=flags, is_add=1)
1554 self.vapi.nat44_interface_add_del_feature(
1555 sw_if_index=self.pg1.sw_if_index,
1558 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1559 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1560 TCP(sport=1025, dport=external_port))
1561 self.pg1.add_stream(p)
1562 self.pg_enable_capture(self.pg_interfaces)
1564 capture = self.pg0.get_capture(1)
1565 backend = capture[0][IP].dst
1567 sessions = self.vapi.nat44_user_session_dump(backend, 0)
1568 self.assertEqual(len(sessions), 1)
1569 self.assertTrue(sessions[0].flags &
1570 self.config_flags.NAT_IS_EXT_HOST_VALID)
1571 self.vapi.nat44_del_session(
1572 address=sessions[0].inside_ip_address,
1573 port=sessions[0].inside_port,
1574 protocol=sessions[0].protocol,
1575 flags=(self.config_flags.NAT_IS_INSIDE |
1576 self.config_flags.NAT_IS_EXT_HOST_VALID),
1577 ext_host_address=sessions[0].ext_host_address,
1578 ext_host_port=sessions[0].ext_host_port)
1581 for port in range(1030, 1100):
1582 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
1583 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1584 TCP(sport=port, dport=external_port))
1586 self.pg1.add_stream(pkts)
1587 self.pg_enable_capture(self.pg_interfaces)
1589 capture = self.pg0.get_capture(len(pkts))
1591 self.assertEqual(p[IP].dst, backend)
1593 def test_multiple_vrf(self):
1594 """ NAT44ED Multiple VRF setup """
1596 external_addr = '1.2.3.4'
1601 self.vapi.nat44_forwarding_enable_disable(enable=1)
1602 self.nat_add_address(self.nat_addr)
1603 flags = self.config_flags.NAT_IS_INSIDE
1604 self.vapi.nat44_interface_add_del_feature(
1605 sw_if_index=self.pg0.sw_if_index,
1607 self.vapi.nat44_interface_add_del_feature(
1608 sw_if_index=self.pg0.sw_if_index,
1609 is_add=1, flags=flags)
1610 self.vapi.nat44_interface_add_del_output_feature(
1611 sw_if_index=self.pg1.sw_if_index,
1613 self.vapi.nat44_interface_add_del_feature(
1614 sw_if_index=self.pg5.sw_if_index,
1616 self.vapi.nat44_interface_add_del_feature(
1617 sw_if_index=self.pg5.sw_if_index,
1618 is_add=1, flags=flags)
1619 self.vapi.nat44_interface_add_del_feature(
1620 sw_if_index=self.pg6.sw_if_index,
1622 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
1623 self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr,
1624 local_port, external_port, vrf_id=1,
1625 proto=IP_PROTOS.tcp, flags=flags)
1626 self.nat_add_static_mapping(
1627 self.pg0.remote_ip4,
1628 external_sw_if_index=self.pg0.sw_if_index,
1629 local_port=local_port,
1631 external_port=external_port,
1632 proto=IP_PROTOS.tcp,
1636 # from client to service (both VRF1)
1637 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1638 IP(src=self.pg6.remote_ip4, dst=external_addr) /
1639 TCP(sport=12345, dport=external_port))
1640 self.pg6.add_stream(p)
1641 self.pg_enable_capture(self.pg_interfaces)
1643 capture = self.pg5.get_capture(1)
1648 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1649 self.assertEqual(tcp.dport, local_port)
1650 self.assert_packet_checksums_valid(p)
1652 self.logger.error(ppp("Unexpected or invalid packet:", p))
1655 # from service back to client (both VRF1)
1656 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1657 IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) /
1658 TCP(sport=local_port, dport=12345))
1659 self.pg5.add_stream(p)
1660 self.pg_enable_capture(self.pg_interfaces)
1662 capture = self.pg6.get_capture(1)
1667 self.assertEqual(ip.src, external_addr)
1668 self.assertEqual(tcp.sport, external_port)
1669 self.assert_packet_checksums_valid(p)
1671 self.logger.error(ppp("Unexpected or invalid packet:", p))
1674 # dynamic NAT from VRF1 to VRF0 (output-feature)
1675 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1676 IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) /
1677 TCP(sport=2345, dport=22))
1678 self.pg5.add_stream(p)
1679 self.pg_enable_capture(self.pg_interfaces)
1681 capture = self.pg1.get_capture(1)
1686 self.assertEqual(ip.src, self.nat_addr)
1687 self.assert_packet_checksums_valid(p)
1690 self.logger.error(ppp("Unexpected or invalid packet:", p))
1693 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
1694 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
1695 TCP(sport=22, dport=port))
1696 self.pg1.add_stream(p)
1697 self.pg_enable_capture(self.pg_interfaces)
1699 capture = self.pg5.get_capture(1)
1704 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1705 self.assertEqual(tcp.dport, 2345)
1706 self.assert_packet_checksums_valid(p)
1708 self.logger.error(ppp("Unexpected or invalid packet:", p))
1711 # from client VRF1 to service VRF0
1712 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1713 IP(src=self.pg6.remote_ip4, dst=self.pg0.local_ip4) /
1714 TCP(sport=12346, dport=external_port))
1715 self.pg6.add_stream(p)
1716 self.pg_enable_capture(self.pg_interfaces)
1718 capture = self.pg0.get_capture(1)
1723 self.assertEqual(ip.dst, self.pg0.remote_ip4)
1724 self.assertEqual(tcp.dport, local_port)
1725 self.assert_packet_checksums_valid(p)
1727 self.logger.error(ppp("Unexpected or invalid packet:", p))
1730 # from service VRF0 back to client VRF1
1731 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1732 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1733 TCP(sport=local_port, dport=12346))
1734 self.pg0.add_stream(p)
1735 self.pg_enable_capture(self.pg_interfaces)
1737 capture = self.pg6.get_capture(1)
1742 self.assertEqual(ip.src, self.pg0.local_ip4)
1743 self.assertEqual(tcp.sport, external_port)
1744 self.assert_packet_checksums_valid(p)
1746 self.logger.error(ppp("Unexpected or invalid packet:", p))
1749 # from client VRF0 to service VRF1
1750 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1751 IP(src=self.pg0.remote_ip4, dst=external_addr) /
1752 TCP(sport=12347, dport=external_port))
1753 self.pg0.add_stream(p)
1754 self.pg_enable_capture(self.pg_interfaces)
1756 capture = self.pg5.get_capture(1)
1761 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1762 self.assertEqual(tcp.dport, local_port)
1763 self.assert_packet_checksums_valid(p)
1765 self.logger.error(ppp("Unexpected or invalid packet:", p))
1768 # from service VRF1 back to client VRF0
1769 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1770 IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) /
1771 TCP(sport=local_port, dport=12347))
1772 self.pg5.add_stream(p)
1773 self.pg_enable_capture(self.pg_interfaces)
1775 capture = self.pg0.get_capture(1)
1780 self.assertEqual(ip.src, external_addr)
1781 self.assertEqual(tcp.sport, external_port)
1782 self.assert_packet_checksums_valid(p)
1784 self.logger.error(ppp("Unexpected or invalid packet:", p))
1787 # from client to server (both VRF1, no translation)
1788 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
1789 IP(src=self.pg6.remote_ip4, dst=self.pg5.remote_ip4) /
1790 TCP(sport=12348, dport=local_port))
1791 self.pg6.add_stream(p)
1792 self.pg_enable_capture(self.pg_interfaces)
1794 capture = self.pg5.get_capture(1)
1799 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1800 self.assertEqual(tcp.dport, local_port)
1801 self.assert_packet_checksums_valid(p)
1803 self.logger.error(ppp("Unexpected or invalid packet:", p))
1806 # from server back to client (both VRF1, no translation)
1807 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1808 IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) /
1809 TCP(sport=local_port, dport=12348))
1810 self.pg5.add_stream(p)
1811 self.pg_enable_capture(self.pg_interfaces)
1813 capture = self.pg6.get_capture(1)
1818 self.assertEqual(ip.src, self.pg5.remote_ip4)
1819 self.assertEqual(tcp.sport, local_port)
1820 self.assert_packet_checksums_valid(p)
1822 self.logger.error(ppp("Unexpected or invalid packet:", p))
1825 # from client VRF1 to server VRF0 (no translation)
1826 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1827 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1828 TCP(sport=local_port, dport=12349))
1829 self.pg0.add_stream(p)
1830 self.pg_enable_capture(self.pg_interfaces)
1832 capture = self.pg6.get_capture(1)
1837 self.assertEqual(ip.src, self.pg0.remote_ip4)
1838 self.assertEqual(tcp.sport, local_port)
1839 self.assert_packet_checksums_valid(p)
1841 self.logger.error(ppp("Unexpected or invalid packet:", p))
1844 # from server VRF0 back to client VRF1 (no translation)
1845 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1846 IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) /
1847 TCP(sport=local_port, dport=12349))
1848 self.pg0.add_stream(p)
1849 self.pg_enable_capture(self.pg_interfaces)
1851 capture = self.pg6.get_capture(1)
1856 self.assertEqual(ip.src, self.pg0.remote_ip4)
1857 self.assertEqual(tcp.sport, local_port)
1858 self.assert_packet_checksums_valid(p)
1860 self.logger.error(ppp("Unexpected or invalid packet:", p))
1863 # from client VRF0 to server VRF1 (no translation)
1864 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
1865 IP(src=self.pg0.remote_ip4, dst=self.pg5.remote_ip4) /
1866 TCP(sport=12344, dport=local_port))
1867 self.pg0.add_stream(p)
1868 self.pg_enable_capture(self.pg_interfaces)
1870 capture = self.pg5.get_capture(1)
1875 self.assertEqual(ip.dst, self.pg5.remote_ip4)
1876 self.assertEqual(tcp.dport, local_port)
1877 self.assert_packet_checksums_valid(p)
1879 self.logger.error(ppp("Unexpected or invalid packet:", p))
1882 # from server VRF1 back to client VRF0 (no translation)
1883 p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) /
1884 IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) /
1885 TCP(sport=local_port, dport=12344))
1886 self.pg5.add_stream(p)
1887 self.pg_enable_capture(self.pg_interfaces)
1889 capture = self.pg0.get_capture(1)
1894 self.assertEqual(ip.src, self.pg5.remote_ip4)
1895 self.assertEqual(tcp.sport, local_port)
1896 self.assert_packet_checksums_valid(p)
1898 self.logger.error(ppp("Unexpected or invalid packet:", p))
1901 def test_outside_address_distribution(self):
1902 """ Outside address distribution based on source address """
1907 for i in range(1, x):
1909 nat_addresses.append(a)
1911 self.nat_add_inside_interface(self.pg0)
1912 self.nat_add_outside_interface(self.pg1)
1914 self.vapi.nat44_add_del_address_range(
1915 first_ip_address=nat_addresses[0],
1916 last_ip_address=nat_addresses[-1],
1917 vrf_id=0xFFFFFFFF, is_add=1, flags=0)
1919 self.pg0.generate_remote_hosts(x)
1923 info = self.create_packet_info(self.pg0, self.pg1)
1924 payload = self.info_to_payload(info)
1925 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
1926 IP(src=self.pg0.remote_hosts[i].ip4,
1927 dst=self.pg1.remote_ip4) /
1928 UDP(sport=7000+i, dport=8000+i) /
1933 self.pg0.add_stream(pkts)
1934 self.pg_enable_capture(self.pg_interfaces)
1936 recvd = self.pg1.get_capture(len(pkts))
1937 for p_recvd in recvd:
1938 payload_info = self.payload_to_info(p_recvd[Raw])
1939 packet_index = payload_info.index
1940 info = self._packet_infos[packet_index]
1941 self.assertTrue(info is not None)
1942 self.assertEqual(packet_index, info.index)
1944 packed = socket.inet_aton(p_sent[IP].src)
1945 numeric = struct.unpack("!L", packed)[0]
1946 numeric = socket.htonl(numeric)
1947 a = nat_addresses[(numeric-1) % len(nat_addresses)]
1950 "Invalid packet (src IP %s translated to %s, but expected %s)"
1951 % (p_sent[IP].src, p_recvd[IP].src, a))
1954 class TestNAT44EDMW(TestNAT44ED):
1955 """ NAT44ED MW Test Case """
1956 vpp_worker_count = 4
1959 @unittest.skip('MW fix required')
1960 def test_users_dump(self):
1961 """ NAT44ED API test - nat44_user_dump """
1963 @unittest.skip('MW fix required')
1964 def test_frag_out_of_order_do_not_translate(self):
1965 """ NAT44ED don't translate fragments arriving out of order """
1967 @unittest.skip('MW fix required')
1968 def test_forwarding(self):
1969 """ NAT44ED forwarding test """
1971 @unittest.skip('MW fix required')
1972 def test_twice_nat(self):
1973 """ NAT44ED Twice NAT """
1975 @unittest.skip('MW fix required')
1976 def test_twice_nat_lb(self):
1977 """ NAT44ED Twice NAT local service load balancing """
1979 @unittest.skip('MW fix required')
1980 def test_output_feature(self):
1981 """ NAT44ED interface output feature (in2out postrouting) """
1983 @unittest.skip('MW fix required')
1984 def test_static_with_port_out2(self):
1985 """ NAT44ED 1:1 NAPT asymmetrical rule """
1987 @unittest.skip('MW fix required')
1988 def test_output_feature_and_service2(self):
1989 """ NAT44ED interface output feature and service host direct access """
1991 @unittest.skip('MW fix required')
1992 def test_static_lb(self):
1993 """ NAT44ED local service load balancing """
1995 @unittest.skip('MW fix required')
1996 def test_static_lb_2(self):
1997 """ NAT44ED local service load balancing (asymmetrical rule) """
1999 @unittest.skip('MW fix required')
2000 def test_lb_affinity(self):
2001 """ NAT44ED local service load balancing affinity """
2003 @unittest.skip('MW fix required')
2004 def test_multiple_vrf(self):
2005 """ NAT44ED Multiple VRF setup """
2007 @unittest.skip('MW fix required')
2008 def test_self_twice_nat_positive(self):
2009 """ NAT44ED Self Twice NAT (positive test) """
2011 @unittest.skip('MW fix required')
2012 def test_self_twice_nat_lb_positive(self):
2013 """ NAT44ED Self Twice NAT local service load balancing (positive test)
2016 def test_dynamic(self):
2017 """ NAT44ED dynamic translation test """
2019 tcp_port_offset = 20
2020 udp_port_offset = 20
2023 self.nat_add_address(self.nat_addr)
2024 self.nat_add_inside_interface(self.pg0)
2025 self.nat_add_outside_interface(self.pg1)
2028 tc1 = self.statistics['/nat44-ed/in2out/slowpath/tcp']
2029 uc1 = self.statistics['/nat44-ed/in2out/slowpath/udp']
2030 ic1 = self.statistics['/nat44-ed/in2out/slowpath/icmp']
2031 dc1 = self.statistics['/nat44-ed/in2out/slowpath/drops']
2033 i2o_pkts = [[] for x in range(0, self.vpp_worker_count)]
2035 for i in range(pkt_count):
2036 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2037 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2038 TCP(sport=tcp_port_offset + i, dport=20))
2039 i2o_pkts[p[TCP].sport % self.vpp_worker_count].append(p)
2041 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2042 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2043 UDP(sport=udp_port_offset + i, dport=20))
2044 i2o_pkts[p[UDP].sport % self.vpp_worker_count].append(p)
2046 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2047 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2048 ICMP(id=icmp_id_offset + i, type='echo-request'))
2049 i2o_pkts[p[ICMP].id % self.vpp_worker_count].append(p)
2051 for i in range(0, self.vpp_worker_count):
2052 if len(i2o_pkts[i]) > 0:
2053 self.pg0.add_stream(i2o_pkts[i], worker=i)
2055 self.pg_enable_capture(self.pg_interfaces)
2057 capture = self.pg1.get_capture(pkt_count * 3)
2059 if_idx = self.pg0.sw_if_index
2060 tc2 = self.statistics['/nat44-ed/in2out/slowpath/tcp']
2061 uc2 = self.statistics['/nat44-ed/in2out/slowpath/udp']
2062 ic2 = self.statistics['/nat44-ed/in2out/slowpath/icmp']
2063 dc2 = self.statistics['/nat44-ed/in2out/slowpath/drops']
2066 tc2[:, if_idx].sum() - tc1[:, if_idx].sum(), pkt_count)
2068 uc2[:, if_idx].sum() - uc1[:, if_idx].sum(), pkt_count)
2070 ic2[:, if_idx].sum() - ic1[:, if_idx].sum(), pkt_count)
2071 self.assertEqual(dc2[:, if_idx].sum() - dc1[:, if_idx].sum(), 0)
2073 self.logger.info(self.vapi.cli("show trace"))
2076 tc1 = self.statistics['/nat44-ed/out2in/fastpath/tcp']
2077 uc1 = self.statistics['/nat44-ed/out2in/fastpath/udp']
2078 ic1 = self.statistics['/nat44-ed/out2in/fastpath/icmp']
2079 dc1 = self.statistics['/nat44-ed/out2in/fastpath/drops']
2081 recvd_tcp_ports = set()
2082 recvd_udp_ports = set()
2083 recvd_icmp_ids = set()
2087 recvd_tcp_ports.add(p[TCP].sport)
2089 recvd_udp_ports.add(p[UDP].sport)
2091 recvd_icmp_ids.add(p[ICMP].id)
2093 recvd_tcp_ports = list(recvd_tcp_ports)
2094 recvd_udp_ports = list(recvd_udp_ports)
2095 recvd_icmp_ids = list(recvd_icmp_ids)
2097 o2i_pkts = [[] for x in range(0, self.vpp_worker_count)]
2098 for i in range(pkt_count):
2099 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2100 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2101 TCP(dport=choice(recvd_tcp_ports), sport=20))
2102 o2i_pkts[p[TCP].dport % self.vpp_worker_count].append(p)
2104 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2105 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2106 UDP(dport=choice(recvd_udp_ports), sport=20))
2107 o2i_pkts[p[UDP].dport % self.vpp_worker_count].append(p)
2109 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2110 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2111 ICMP(id=choice(recvd_icmp_ids), type='echo-reply'))
2112 o2i_pkts[p[ICMP].id % self.vpp_worker_count].append(p)
2114 for i in range(0, self.vpp_worker_count):
2115 if len(o2i_pkts[i]) > 0:
2116 self.pg1.add_stream(o2i_pkts[i], worker=i)
2118 self.pg_enable_capture(self.pg_interfaces)
2120 capture = self.pg0.get_capture(pkt_count * 3)
2121 for packet in capture:
2123 self.assert_packet_checksums_valid(packet)
2124 self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
2125 if packet.haslayer(TCP):
2126 self.assert_in_range(
2127 packet[TCP].dport, tcp_port_offset,
2128 tcp_port_offset + pkt_count, "dst TCP port")
2129 elif packet.haslayer(UDP):
2130 self.assert_in_range(
2131 packet[UDP].dport, udp_port_offset,
2132 udp_port_offset + pkt_count, "dst UDP port")
2134 self.assert_in_range(
2135 packet[ICMP].id, icmp_id_offset,
2136 icmp_id_offset + pkt_count, "ICMP id")
2138 self.logger.error(ppp("Unexpected or invalid packet "
2139 "(inside network):", packet))
2142 if_idx = self.pg1.sw_if_index
2143 tc2 = self.statistics['/nat44-ed/out2in/fastpath/tcp']
2144 uc2 = self.statistics['/nat44-ed/out2in/fastpath/udp']
2145 ic2 = self.statistics['/nat44-ed/out2in/fastpath/icmp']
2146 dc2 = self.statistics['/nat44-ed/out2in/fastpath/drops']
2149 tc2[:, if_idx].sum() - tc1[:, if_idx].sum(), pkt_count)
2151 uc2[:, if_idx].sum() - uc1[:, if_idx].sum(), pkt_count)
2153 ic2[:, if_idx].sum() - ic1[:, if_idx].sum(), pkt_count)
2154 self.assertEqual(dc2[:, if_idx].sum() - dc1[:, if_idx].sum(), 0)
2156 sc = self.statistics['/nat44-ed/total-sessions']
2157 self.assertEqual(sc[:, 0].sum(), len(recvd_tcp_ports) +
2158 len(recvd_udp_ports) + len(recvd_icmp_ids))
2160 def test_frag_in_order(self):
2161 """ NAT44ED translate fragments arriving in order """
2163 self.nat_add_address(self.nat_addr)
2164 self.nat_add_inside_interface(self.pg0)
2165 self.nat_add_outside_interface(self.pg1)
2167 self.frag_in_order(proto=IP_PROTOS.tcp, ignore_port=True)
2168 self.frag_in_order(proto=IP_PROTOS.udp, ignore_port=True)
2169 self.frag_in_order(proto=IP_PROTOS.icmp, ignore_port=True)
2171 def test_frag_in_order_do_not_translate(self):
2172 """ NAT44ED don't translate fragments arriving in order """
2174 self.nat_add_address(self.nat_addr)
2175 self.nat_add_inside_interface(self.pg0)
2176 self.nat_add_outside_interface(self.pg1)
2177 self.vapi.nat44_forwarding_enable_disable(enable=True)
2179 self.frag_in_order(proto=IP_PROTOS.tcp, dont_translate=True)
2181 def test_frag_out_of_order(self):
2182 """ NAT44ED translate fragments arriving out of order """
2184 self.nat_add_address(self.nat_addr)
2185 self.nat_add_inside_interface(self.pg0)
2186 self.nat_add_outside_interface(self.pg1)
2188 self.frag_out_of_order(proto=IP_PROTOS.tcp, ignore_port=True)
2189 self.frag_out_of_order(proto=IP_PROTOS.udp, ignore_port=True)
2190 self.frag_out_of_order(proto=IP_PROTOS.icmp, ignore_port=True)
2192 def test_frag_in_order_in_plus_out(self):
2193 """ NAT44ED in+out interface fragments in order """
2195 in_port = self.random_port()
2196 out_port = self.random_port()
2198 self.nat_add_address(self.nat_addr)
2199 self.nat_add_inside_interface(self.pg0)
2200 self.nat_add_outside_interface(self.pg0)
2201 self.nat_add_inside_interface(self.pg1)
2202 self.nat_add_outside_interface(self.pg1)
2204 # add static mappings for server
2205 self.nat_add_static_mapping(self.server_addr,
2209 proto=IP_PROTOS.tcp)
2210 self.nat_add_static_mapping(self.server_addr,
2214 proto=IP_PROTOS.udp)
2215 self.nat_add_static_mapping(self.server_addr,
2217 proto=IP_PROTOS.icmp)
2219 # run tests for each protocol
2220 self.frag_in_order_in_plus_out(self.server_addr,
2225 self.frag_in_order_in_plus_out(self.server_addr,
2230 self.frag_in_order_in_plus_out(self.server_addr,
2236 def test_frag_out_of_order_in_plus_out(self):
2237 """ NAT44ED in+out interface fragments out of order """
2239 in_port = self.random_port()
2240 out_port = self.random_port()
2242 self.nat_add_address(self.nat_addr)
2243 self.nat_add_inside_interface(self.pg0)
2244 self.nat_add_outside_interface(self.pg0)
2245 self.nat_add_inside_interface(self.pg1)
2246 self.nat_add_outside_interface(self.pg1)
2248 # add static mappings for server
2249 self.nat_add_static_mapping(self.server_addr,
2253 proto=IP_PROTOS.tcp)
2254 self.nat_add_static_mapping(self.server_addr,
2258 proto=IP_PROTOS.udp)
2259 self.nat_add_static_mapping(self.server_addr,
2261 proto=IP_PROTOS.icmp)
2263 # run tests for each protocol
2264 self.frag_out_of_order_in_plus_out(self.server_addr,
2269 self.frag_out_of_order_in_plus_out(self.server_addr,
2274 self.frag_out_of_order_in_plus_out(self.server_addr,
2280 def test_reass_hairpinning(self):
2281 """ NAT44ED fragments hairpinning """
2283 server_addr = self.pg0.remote_hosts[1].ip4
2285 host_in_port = self.random_port()
2286 server_in_port = self.random_port()
2287 server_out_port = self.random_port()
2289 self.nat_add_address(self.nat_addr)
2290 self.nat_add_inside_interface(self.pg0)
2291 self.nat_add_outside_interface(self.pg1)
2293 # add static mapping for server
2294 self.nat_add_static_mapping(server_addr, self.nat_addr,
2295 server_in_port, server_out_port,
2296 proto=IP_PROTOS.tcp)
2297 self.nat_add_static_mapping(server_addr, self.nat_addr,
2298 server_in_port, server_out_port,
2299 proto=IP_PROTOS.udp)
2300 self.nat_add_static_mapping(server_addr, self.nat_addr)
2302 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2303 host_in_port, proto=IP_PROTOS.tcp,
2305 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2306 host_in_port, proto=IP_PROTOS.udp,
2308 self.reass_hairpinning(server_addr, server_in_port, server_out_port,
2309 host_in_port, proto=IP_PROTOS.icmp,
2312 def test_session_limit_per_vrf(self):
2313 """ NAT44ED per vrf session limit """
2316 inside_vrf10 = self.pg2
2321 # 2 interfaces pg0, pg1 (vrf10, limit 1 tcp session)
2322 # non existing vrf_id makes process core dump
2323 self.vapi.nat44_set_session_limit(session_limit=limit, vrf_id=10)
2325 self.nat_add_inside_interface(inside)
2326 self.nat_add_inside_interface(inside_vrf10)
2327 self.nat_add_outside_interface(outside)
2330 self.nat_add_interface_address(outside)
2332 # BUG: causing core dump - when bad vrf_id is specified
2333 # self.nat_add_address(outside.local_ip4, vrf_id=20)
2335 stream = self.create_tcp_stream(inside_vrf10, outside, limit * 2)
2336 inside_vrf10.add_stream(stream)
2338 self.pg_enable_capture(self.pg_interfaces)
2341 capture = outside.get_capture(limit)
2343 stream = self.create_tcp_stream(inside, outside, limit * 2)
2344 inside.add_stream(stream)
2346 self.pg_enable_capture(self.pg_interfaces)
2349 capture = outside.get_capture(len(stream))
2351 def test_show_max_translations(self):
2352 """ NAT44ED API test - max translations per thread """
2353 nat_config = self.vapi.nat_show_config_2()
2354 self.assertEqual(self.max_sessions,
2355 nat_config.max_translations_per_thread)
2357 def test_lru_cleanup(self):
2358 """ NAT44ED LRU cleanup algorithm """
2360 self.nat_add_address(self.nat_addr)
2361 self.nat_add_inside_interface(self.pg0)
2362 self.nat_add_outside_interface(self.pg1)
2364 self.vapi.nat_set_timeouts(
2365 udp=1, tcp_established=7440, tcp_transitory=30, icmp=1)
2367 tcp_port_out = self.init_tcp_session(self.pg0, self.pg1, 2000, 80)
2369 for i in range(0, self.max_sessions - 1):
2370 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2371 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
2372 UDP(sport=7000+i, dport=80))
2375 self.pg0.add_stream(pkts)
2376 self.pg_enable_capture(self.pg_interfaces)
2378 self.pg1.get_capture(len(pkts))
2379 self.sleep(1.5, "wait for timeouts")
2382 for i in range(0, self.max_sessions - 1):
2383 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2384 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
2385 ICMP(id=8000+i, type='echo-request'))
2388 self.pg0.add_stream(pkts)
2389 self.pg_enable_capture(self.pg_interfaces)
2391 self.pg1.get_capture(len(pkts))
2393 def test_session_rst_timeout(self):
2394 """ NAT44ED session RST timeouts """
2396 self.nat_add_address(self.nat_addr)
2397 self.nat_add_inside_interface(self.pg0)
2398 self.nat_add_outside_interface(self.pg1)
2400 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
2401 tcp_transitory=5, icmp=60)
2403 self.init_tcp_session(self.pg0, self.pg1, self.tcp_port_in,
2404 self.tcp_external_port)
2405 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2406 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2407 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
2409 self.pg0.add_stream(p)
2410 self.pg_enable_capture(self.pg_interfaces)
2412 self.pg1.get_capture(1)
2416 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2417 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2418 TCP(sport=self.tcp_port_in + 1, dport=self.tcp_external_port + 1,
2420 self.pg0.add_stream(p)
2421 self.pg_enable_capture(self.pg_interfaces)
2423 self.pg1.get_capture(1)
2425 def test_dynamic_out_of_ports(self):
2426 """ NAT44ED dynamic translation test: out of ports """
2428 self.nat_add_inside_interface(self.pg0)
2429 self.nat_add_outside_interface(self.pg1)
2431 # in2out and no NAT addresses added
2432 err_old = self.statistics.get_err_counter(
2433 '/err/nat44-ed-in2out-slowpath/out of ports')
2435 pkts = self.create_stream_in(self.pg0, self.pg1)
2436 self.pg0.add_stream(pkts)
2437 self.pg_enable_capture(self.pg_interfaces)
2439 self.pg1.get_capture(0, timeout=1)
2441 err_new = self.statistics.get_err_counter(
2442 '/err/nat44-ed-in2out-slowpath/out of ports')
2444 self.assertEqual(err_new - err_old, len(pkts))
2446 # in2out after NAT addresses added
2447 self.nat_add_address(self.nat_addr)
2449 err_old = self.statistics.get_err_counter(
2450 '/err/nat44-ed-in2out-slowpath/out of ports')
2452 pkts = self.create_stream_in(self.pg0, self.pg1)
2453 self.pg0.add_stream(pkts)
2454 self.pg_enable_capture(self.pg_interfaces)
2456 capture = self.pg1.get_capture(len(pkts))
2457 self.verify_capture_out(capture, ignore_port=True)
2459 err_new = self.statistics.get_err_counter(
2460 '/err/nat44-ed-in2out-slowpath/out of ports')
2462 self.assertEqual(err_new, err_old)
2464 def test_unknown_proto(self):
2465 """ NAT44ED translate packet with unknown protocol """
2467 self.nat_add_address(self.nat_addr)
2468 self.nat_add_inside_interface(self.pg0)
2469 self.nat_add_outside_interface(self.pg1)
2472 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2473 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2474 TCP(sport=self.tcp_port_in, dport=20))
2475 self.pg0.add_stream(p)
2476 self.pg_enable_capture(self.pg_interfaces)
2478 p = self.pg1.get_capture(1)
2480 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2481 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2483 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2484 TCP(sport=1234, dport=1234))
2485 self.pg0.add_stream(p)
2486 self.pg_enable_capture(self.pg_interfaces)
2488 p = self.pg1.get_capture(1)
2491 self.assertEqual(packet[IP].src, self.nat_addr)
2492 self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
2493 self.assertEqual(packet.haslayer(GRE), 1)
2494 self.assert_packet_checksums_valid(packet)
2496 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2500 p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
2501 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
2503 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2504 TCP(sport=1234, dport=1234))
2505 self.pg1.add_stream(p)
2506 self.pg_enable_capture(self.pg_interfaces)
2508 p = self.pg0.get_capture(1)
2511 self.assertEqual(packet[IP].src, self.pg1.remote_ip4)
2512 self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
2513 self.assertEqual(packet.haslayer(GRE), 1)
2514 self.assert_packet_checksums_valid(packet)
2516 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2519 def test_hairpinning_unknown_proto(self):
2520 """ NAT44ED translate packet with unknown protocol - hairpinning """
2521 host = self.pg0.remote_hosts[0]
2522 server = self.pg0.remote_hosts[1]
2524 server_out_port = 8765
2525 server_nat_ip = "10.0.0.11"
2527 self.nat_add_address(self.nat_addr)
2528 self.nat_add_inside_interface(self.pg0)
2529 self.nat_add_outside_interface(self.pg1)
2531 # add static mapping for server
2532 self.nat_add_static_mapping(server.ip4, server_nat_ip)
2535 p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
2536 IP(src=host.ip4, dst=server_nat_ip) /
2537 TCP(sport=host_in_port, dport=server_out_port))
2538 self.pg0.add_stream(p)
2539 self.pg_enable_capture(self.pg_interfaces)
2541 self.pg0.get_capture(1)
2543 p = (Ether(dst=self.pg0.local_mac, src=host.mac) /
2544 IP(src=host.ip4, dst=server_nat_ip) /
2546 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2547 TCP(sport=1234, dport=1234))
2548 self.pg0.add_stream(p)
2549 self.pg_enable_capture(self.pg_interfaces)
2551 p = self.pg0.get_capture(1)
2554 self.assertEqual(packet[IP].src, self.nat_addr)
2555 self.assertEqual(packet[IP].dst, server.ip4)
2556 self.assertEqual(packet.haslayer(GRE), 1)
2557 self.assert_packet_checksums_valid(packet)
2559 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2563 p = (Ether(dst=self.pg0.local_mac, src=server.mac) /
2564 IP(src=server.ip4, dst=self.nat_addr) /
2566 IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
2567 TCP(sport=1234, dport=1234))
2568 self.pg0.add_stream(p)
2569 self.pg_enable_capture(self.pg_interfaces)
2571 p = self.pg0.get_capture(1)
2574 self.assertEqual(packet[IP].src, server_nat_ip)
2575 self.assertEqual(packet[IP].dst, host.ip4)
2576 self.assertEqual(packet.haslayer(GRE), 1)
2577 self.assert_packet_checksums_valid(packet)
2579 self.logger.error(ppp("Unexpected or invalid packet:", packet))
2582 def test_output_feature_and_service(self):
2583 """ NAT44ED interface output feature and services """
2584 external_addr = '1.2.3.4'
2588 self.vapi.nat44_forwarding_enable_disable(enable=1)
2589 self.nat_add_address(self.nat_addr)
2590 flags = self.config_flags.NAT_IS_ADDR_ONLY
2591 self.vapi.nat44_add_del_identity_mapping(
2592 ip_address=self.pg1.remote_ip4, sw_if_index=0xFFFFFFFF,
2593 flags=flags, is_add=1)
2594 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
2595 self.nat_add_static_mapping(self.pg0.remote_ip4, external_addr,
2596 local_port, external_port,
2597 proto=IP_PROTOS.tcp, flags=flags)
2599 self.nat_add_inside_interface(self.pg0)
2600 self.nat_add_outside_interface(self.pg0)
2601 self.vapi.nat44_interface_add_del_output_feature(
2602 sw_if_index=self.pg1.sw_if_index, is_add=1)
2604 # from client to service
2605 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2606 IP(src=self.pg1.remote_ip4, dst=external_addr) /
2607 TCP(sport=12345, dport=external_port))
2608 self.pg1.add_stream(p)
2609 self.pg_enable_capture(self.pg_interfaces)
2611 capture = self.pg0.get_capture(1)
2616 self.assertEqual(ip.dst, self.pg0.remote_ip4)
2617 self.assertEqual(tcp.dport, local_port)
2618 self.assert_packet_checksums_valid(p)
2620 self.logger.error(ppp("Unexpected or invalid packet:", p))
2623 # from service back to client
2624 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2625 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2626 TCP(sport=local_port, dport=12345))
2627 self.pg0.add_stream(p)
2628 self.pg_enable_capture(self.pg_interfaces)
2630 capture = self.pg1.get_capture(1)
2635 self.assertEqual(ip.src, external_addr)
2636 self.assertEqual(tcp.sport, external_port)
2637 self.assert_packet_checksums_valid(p)
2639 self.logger.error(ppp("Unexpected or invalid packet:", p))
2642 # from local network host to external network
2643 pkts = self.create_stream_in(self.pg0, self.pg1)
2644 self.pg0.add_stream(pkts)
2645 self.pg_enable_capture(self.pg_interfaces)
2647 capture = self.pg1.get_capture(len(pkts))
2648 self.verify_capture_out(capture, ignore_port=True)
2649 pkts = self.create_stream_in(self.pg0, self.pg1)
2650 self.pg0.add_stream(pkts)
2651 self.pg_enable_capture(self.pg_interfaces)
2653 capture = self.pg1.get_capture(len(pkts))
2654 self.verify_capture_out(capture, ignore_port=True)
2656 # from external network back to local network host
2657 pkts = self.create_stream_out(self.pg1)
2658 self.pg1.add_stream(pkts)
2659 self.pg_enable_capture(self.pg_interfaces)
2661 capture = self.pg0.get_capture(len(pkts))
2662 self.verify_capture_in(capture, self.pg0)
2664 def test_output_feature_and_service3(self):
2665 """ NAT44ED interface output feature and DST NAT """
2666 external_addr = '1.2.3.4'
2670 self.vapi.nat44_forwarding_enable_disable(enable=1)
2671 self.nat_add_address(self.nat_addr)
2672 flags = self.config_flags.NAT_IS_OUT2IN_ONLY
2673 self.nat_add_static_mapping(self.pg1.remote_ip4, external_addr,
2674 local_port, external_port,
2675 proto=IP_PROTOS.tcp, flags=flags)
2677 self.nat_add_inside_interface(self.pg0)
2678 self.nat_add_outside_interface(self.pg0)
2679 self.vapi.nat44_interface_add_del_output_feature(
2680 sw_if_index=self.pg1.sw_if_index, is_add=1)
2682 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
2683 IP(src=self.pg0.remote_ip4, dst=external_addr) /
2684 TCP(sport=12345, dport=external_port))
2685 self.pg0.add_stream(p)
2686 self.pg_enable_capture(self.pg_interfaces)
2688 capture = self.pg1.get_capture(1)
2693 self.assertEqual(ip.src, self.pg0.remote_ip4)
2694 self.assertEqual(tcp.sport, 12345)
2695 self.assertEqual(ip.dst, self.pg1.remote_ip4)
2696 self.assertEqual(tcp.dport, local_port)
2697 self.assert_packet_checksums_valid(p)
2699 self.logger.error(ppp("Unexpected or invalid packet:", p))
2702 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2703 IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
2704 TCP(sport=local_port, dport=12345))
2705 self.pg1.add_stream(p)
2706 self.pg_enable_capture(self.pg_interfaces)
2708 capture = self.pg0.get_capture(1)
2713 self.assertEqual(ip.src, external_addr)
2714 self.assertEqual(tcp.sport, external_port)
2715 self.assertEqual(ip.dst, self.pg0.remote_ip4)
2716 self.assertEqual(tcp.dport, 12345)
2717 self.assert_packet_checksums_valid(p)
2719 self.logger.error(ppp("Unexpected or invalid packet:", p))
2722 def test_self_twice_nat_lb_negative(self):
2723 """ NAT44ED Self Twice NAT local service load balancing (negative test)
2725 self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True,
2728 def test_self_twice_nat_negative(self):
2729 """ NAT44ED Self Twice NAT (negative test) """
2730 self.twice_nat_common(self_twice_nat=True)
2732 def test_static_lb_multi_clients(self):
2733 """ NAT44ED local service load balancing - multiple clients"""
2735 external_addr = self.nat_addr
2738 server1 = self.pg0.remote_hosts[0]
2739 server2 = self.pg0.remote_hosts[1]
2740 server3 = self.pg0.remote_hosts[2]
2742 locals = [{'addr': server1.ip4,
2746 {'addr': server2.ip4,
2751 flags = self.config_flags.NAT_IS_INSIDE
2752 self.vapi.nat44_interface_add_del_feature(
2753 sw_if_index=self.pg0.sw_if_index,
2754 flags=flags, is_add=1)
2755 self.vapi.nat44_interface_add_del_feature(
2756 sw_if_index=self.pg1.sw_if_index,
2759 self.nat_add_address(self.nat_addr)
2760 self.vapi.nat44_add_del_lb_static_mapping(is_add=1,
2761 external_addr=external_addr,
2762 external_port=external_port,
2763 protocol=IP_PROTOS.tcp,
2764 local_num=len(locals),
2769 clients = ip4_range(self.pg1.remote_ip4, 10, 50)
2771 for client in clients:
2772 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2773 IP(src=client, dst=self.nat_addr) /
2774 TCP(sport=12345, dport=external_port))
2776 self.pg1.add_stream(pkts)
2777 self.pg_enable_capture(self.pg_interfaces)
2779 capture = self.pg0.get_capture(len(pkts))
2781 if p[IP].dst == server1.ip4:
2785 self.assertGreaterEqual(server1_n, server2_n)
2788 'addr': server3.ip4,
2795 self.vapi.nat44_lb_static_mapping_add_del_local(
2797 external_addr=external_addr,
2798 external_port=external_port,
2800 protocol=IP_PROTOS.tcp)
2804 clients = ip4_range(self.pg1.remote_ip4, 60, 110)
2806 for client in clients:
2807 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
2808 IP(src=client, dst=self.nat_addr) /
2809 TCP(sport=12346, dport=external_port))
2811 self.assertGreater(len(pkts), 0)
2812 self.pg1.add_stream(pkts)
2813 self.pg_enable_capture(self.pg_interfaces)
2815 capture = self.pg0.get_capture(len(pkts))
2817 if p[IP].dst == server1.ip4:
2819 elif p[IP].dst == server2.ip4:
2823 self.assertGreater(server1_n, 0)
2824 self.assertGreater(server2_n, 0)
2825 self.assertGreater(server3_n, 0)
2828 'addr': server2.ip4,
2834 # remove one back-end
2835 self.vapi.nat44_lb_static_mapping_add_del_local(
2837 external_addr=external_addr,
2838 external_port=external_port,
2840 protocol=IP_PROTOS.tcp)
2844 self.pg1.add_stream(pkts)
2845 self.pg_enable_capture(self.pg_interfaces)
2847 capture = self.pg0.get_capture(len(pkts))
2849 if p[IP].dst == server1.ip4:
2851 elif p[IP].dst == server2.ip4:
2855 self.assertGreater(server1_n, 0)
2856 self.assertEqual(server2_n, 0)
2857 self.assertGreater(server3_n, 0)
2859 def test_syslog_sess(self):
2860 """ NAT44ED Test syslog session creation and deletion """
2861 self.vapi.syslog_set_filter(
2862 self.syslog_severity.SYSLOG_API_SEVERITY_INFO)
2863 self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4)
2865 self.nat_add_address(self.nat_addr)
2866 self.nat_add_inside_interface(self.pg0)
2867 self.nat_add_outside_interface(self.pg1)
2869 p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
2870 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
2871 TCP(sport=self.tcp_port_in, dport=self.tcp_external_port))
2872 self.pg0.add_stream(p)
2873 self.pg_enable_capture(self.pg_interfaces)
2875 capture = self.pg1.get_capture(1)
2876 self.tcp_port_out = capture[0][TCP].sport
2877 capture = self.pg3.get_capture(1)
2878 self.verify_syslog_sess(capture[0][Raw].load)
2880 self.pg_enable_capture(self.pg_interfaces)
2882 self.nat_add_address(self.nat_addr, is_add=0)
2883 capture = self.pg3.get_capture(1)
2884 self.verify_syslog_sess(capture[0][Raw].load, False)
2886 def test_twice_nat_interface_addr(self):
2887 """ NAT44ED Acquire twice NAT addresses from interface """
2888 flags = self.config_flags.NAT_IS_TWICE_NAT
2889 self.vapi.nat44_add_del_interface_addr(
2890 sw_if_index=self.pg11.sw_if_index,
2891 flags=flags, is_add=1)
2893 # no address in NAT pool
2894 adresses = self.vapi.nat44_address_dump()
2895 self.assertEqual(0, len(adresses))
2897 # configure interface address and check NAT address pool
2898 self.pg11.config_ip4()
2899 adresses = self.vapi.nat44_address_dump()
2900 self.assertEqual(1, len(adresses))
2901 self.assertEqual(str(adresses[0].ip_address),
2902 self.pg11.local_ip4)
2903 self.assertEqual(adresses[0].flags, flags)
2905 # remove interface address and check NAT address pool
2906 self.pg11.unconfig_ip4()
2907 adresses = self.vapi.nat44_address_dump()
2908 self.assertEqual(0, len(adresses))
2910 def test_output_feature_stateful_acl(self):
2911 """ NAT44ED output feature works with stateful ACL """
2913 self.nat_add_address(self.nat_addr)
2914 self.vapi.nat44_interface_add_del_output_feature(
2915 sw_if_index=self.pg0.sw_if_index,
2916 flags=self.config_flags.NAT_IS_INSIDE, is_add=1)
2917 self.vapi.nat44_interface_add_del_output_feature(
2918 sw_if_index=self.pg1.sw_if_index,
2919 flags=self.config_flags.NAT_IS_OUTSIDE, is_add=1)
2921 # First ensure that the NAT is working sans ACL
2923 # send packets out2in, no sessions yet so packets should drop
2924 pkts_out2in = self.create_stream_out(self.pg1)
2925 self.send_and_assert_no_replies(self.pg1, pkts_out2in)
2927 # send packets into inside intf, ensure received via outside intf
2928 pkts_in2out = self.create_stream_in(self.pg0, self.pg1)
2929 capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1,
2931 self.verify_capture_out(capture, ignore_port=True)
2933 # send out2in again, with sessions created it should work now
2934 pkts_out2in = self.create_stream_out(self.pg1)
2935 capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0,
2937 self.verify_capture_in(capture, self.pg0)
2939 # Create an ACL blocking everything
2940 out2in_deny_rule = AclRule(is_permit=0)
2941 out2in_acl = VppAcl(self, rules=[out2in_deny_rule])
2942 out2in_acl.add_vpp_config()
2944 # create an ACL to permit/reflect everything
2945 in2out_reflect_rule = AclRule(is_permit=2)
2946 in2out_acl = VppAcl(self, rules=[in2out_reflect_rule])
2947 in2out_acl.add_vpp_config()
2949 # apply as input acl on interface and confirm it blocks everything
2950 acl_if = VppAclInterface(self, sw_if_index=self.pg1.sw_if_index,
2951 n_input=1, acls=[out2in_acl])
2952 acl_if.add_vpp_config()
2953 self.send_and_assert_no_replies(self.pg1, pkts_out2in)
2956 acl_if.acls = [out2in_acl, in2out_acl]
2957 acl_if.add_vpp_config()
2958 # send in2out to generate ACL state (NAT state was created earlier)
2959 capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1,
2961 self.verify_capture_out(capture, ignore_port=True)
2963 # send out2in again. ACL state exists so it should work now.
2964 # TCP packets with the syn flag set also need the ack flag
2965 for p in pkts_out2in:
2966 if p.haslayer(TCP) and p[TCP].flags & 0x02:
2967 p[TCP].flags |= 0x10
2968 capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0,
2970 self.verify_capture_in(capture, self.pg0)
2971 self.logger.info(self.vapi.cli("show trace"))
2973 def test_tcp_close(self):
2974 """ NAT44ED Close TCP session from inside network - output feature """
2975 old_timeouts = self.vapi.nat_get_timeouts()
2977 self.vapi.nat_set_timeouts(
2978 udp=old_timeouts.udp,
2979 tcp_established=old_timeouts.tcp_established,
2980 icmp=old_timeouts.icmp,
2981 tcp_transitory=new_transitory)
2983 self.vapi.nat44_forwarding_enable_disable(enable=1)
2984 self.nat_add_address(self.pg1.local_ip4)
2985 twice_nat_addr = '10.0.1.3'
2986 service_ip = '192.168.16.150'
2987 self.nat_add_address(twice_nat_addr, twice_nat=1)
2989 flags = self.config_flags.NAT_IS_INSIDE
2990 self.vapi.nat44_interface_add_del_feature(
2991 sw_if_index=self.pg0.sw_if_index,
2993 self.vapi.nat44_interface_add_del_feature(
2994 sw_if_index=self.pg0.sw_if_index,
2995 flags=flags, is_add=1)
2996 self.vapi.nat44_interface_add_del_output_feature(
2998 sw_if_index=self.pg1.sw_if_index)
3000 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3001 self.config_flags.NAT_IS_TWICE_NAT)
3002 self.nat_add_static_mapping(self.pg0.remote_ip4,
3004 proto=IP_PROTOS.tcp,
3006 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3007 start_sessnum = len(sessions)
3009 # SYN packet out->in
3010 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3011 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3012 TCP(sport=33898, dport=80, flags="S"))
3013 self.pg1.add_stream(p)
3014 self.pg_enable_capture(self.pg_interfaces)
3016 capture = self.pg0.get_capture(1)
3018 tcp_port = p[TCP].sport
3020 # SYN + ACK packet in->out
3021 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3022 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3023 TCP(sport=80, dport=tcp_port, flags="SA"))
3024 self.pg0.add_stream(p)
3025 self.pg_enable_capture(self.pg_interfaces)
3027 self.pg1.get_capture(1)
3029 # ACK packet out->in
3030 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3031 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3032 TCP(sport=33898, dport=80, flags="A"))
3033 self.pg1.add_stream(p)
3034 self.pg_enable_capture(self.pg_interfaces)
3036 self.pg0.get_capture(1)
3038 # FIN packet in -> out
3039 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3040 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3041 TCP(sport=80, dport=tcp_port, flags="FA", seq=100, ack=300))
3042 self.pg0.add_stream(p)
3043 self.pg_enable_capture(self.pg_interfaces)
3045 self.pg1.get_capture(1)
3047 # FIN+ACK packet out -> in
3048 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3049 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3050 TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
3051 self.pg1.add_stream(p)
3052 self.pg_enable_capture(self.pg_interfaces)
3054 self.pg0.get_capture(1)
3056 # ACK packet in -> out
3057 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3058 IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
3059 TCP(sport=80, dport=tcp_port, flags="A", seq=101, ack=301))
3060 self.pg0.add_stream(p)
3061 self.pg_enable_capture(self.pg_interfaces)
3063 self.pg1.get_capture(1)
3065 # session now in transitory timeout
3066 # try SYN packet out->in - should be dropped
3067 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3068 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3069 TCP(sport=33898, dport=80, flags="S"))
3070 self.pg1.add_stream(p)
3071 self.pg_enable_capture(self.pg_interfaces)
3074 self.sleep(new_transitory, "wait for transitory timeout")
3075 self.pg0.assert_nothing_captured(0)
3077 # session should still exist
3078 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3079 self.assertEqual(len(sessions) - start_sessnum, 1)
3081 # send FIN+ACK packet out -> in - will cause session to be wiped
3082 # but won't create a new session
3083 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3084 IP(src=self.pg1.remote_ip4, dst=service_ip) /
3085 TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
3086 self.pg1.add_stream(p)
3087 self.pg_enable_capture(self.pg_interfaces)
3090 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3091 self.assertEqual(len(sessions) - start_sessnum, 0)
3092 self.pg0.assert_nothing_captured(0)
3094 def test_tcp_session_close_in(self):
3095 """ NAT44ED Close TCP session from inside network """
3097 in_port = self.tcp_port_in
3099 ext_port = self.tcp_external_port
3101 self.nat_add_address(self.nat_addr)
3102 self.nat_add_inside_interface(self.pg0)
3103 self.nat_add_outside_interface(self.pg1)
3104 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3105 in_port, out_port, proto=IP_PROTOS.tcp,
3106 flags=self.config_flags.NAT_IS_TWICE_NAT)
3108 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3109 session_n = len(sessions)
3111 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3112 tcp_transitory=2, icmp=5)
3114 self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3116 # FIN packet in -> out
3117 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3118 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3119 TCP(sport=in_port, dport=ext_port,
3120 flags="FA", seq=100, ack=300))
3121 self.pg0.add_stream(p)
3122 self.pg_enable_capture(self.pg_interfaces)
3124 self.pg1.get_capture(1)
3128 # ACK packet out -> in
3129 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3130 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3131 TCP(sport=ext_port, dport=out_port,
3132 flags="A", seq=300, ack=101))
3135 # FIN packet out -> in
3136 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3137 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3138 TCP(sport=ext_port, dport=out_port,
3139 flags="FA", seq=300, ack=101))
3142 self.pg1.add_stream(pkts)
3143 self.pg_enable_capture(self.pg_interfaces)
3145 self.pg0.get_capture(2)
3147 # ACK packet in -> out
3148 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3149 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3150 TCP(sport=in_port, dport=ext_port,
3151 flags="A", seq=101, ack=301))
3152 self.pg0.add_stream(p)
3153 self.pg_enable_capture(self.pg_interfaces)
3155 self.pg1.get_capture(1)
3157 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3158 self.assertEqual(len(sessions) - session_n, 1)
3160 out2in_drops = self.get_err_counter(
3161 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3162 in2out_drops = self.get_err_counter(
3163 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3165 # extra FIN packet out -> in - this should be dropped
3166 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3167 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3168 TCP(sport=ext_port, dport=out_port,
3169 flags="FA", seq=300, ack=101))
3171 self.pg1.add_stream(p)
3172 self.pg_enable_capture(self.pg_interfaces)
3174 self.pg0.assert_nothing_captured()
3176 # extra ACK packet in -> out - this should be dropped
3177 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3178 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3179 TCP(sport=in_port, dport=ext_port,
3180 flags="A", seq=101, ack=301))
3181 self.pg0.add_stream(p)
3182 self.pg_enable_capture(self.pg_interfaces)
3184 self.pg1.assert_nothing_captured()
3186 stats = self.get_err_counter(
3187 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3188 self.assertEqual(stats - out2in_drops, 1)
3189 stats = self.get_err_counter(
3190 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3191 self.assertEqual(stats - in2out_drops, 1)
3194 # extra ACK packet in -> out - this will cause session to be wiped
3195 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3196 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3197 TCP(sport=in_port, dport=ext_port,
3198 flags="A", seq=101, ack=301))
3199 self.pg0.add_stream(p)
3200 self.pg_enable_capture(self.pg_interfaces)
3202 self.pg1.assert_nothing_captured()
3203 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3204 self.assertEqual(len(sessions) - session_n, 0)
3206 def test_tcp_session_close_out(self):
3207 """ NAT44ED Close TCP session from outside network """
3209 in_port = self.tcp_port_in
3211 ext_port = self.tcp_external_port
3213 self.nat_add_address(self.nat_addr)
3214 self.nat_add_inside_interface(self.pg0)
3215 self.nat_add_outside_interface(self.pg1)
3216 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3217 in_port, out_port, proto=IP_PROTOS.tcp,
3218 flags=self.config_flags.NAT_IS_TWICE_NAT)
3220 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3221 session_n = len(sessions)
3223 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3224 tcp_transitory=2, icmp=5)
3226 _ = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3228 # FIN packet out -> in
3229 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3230 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3231 TCP(sport=ext_port, dport=out_port,
3232 flags="FA", seq=100, ack=300))
3233 self.pg1.add_stream(p)
3234 self.pg_enable_capture(self.pg_interfaces)
3236 self.pg0.get_capture(1)
3238 # FIN+ACK packet in -> out
3239 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3240 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3241 TCP(sport=in_port, dport=ext_port,
3242 flags="FA", seq=300, ack=101))
3244 self.pg0.add_stream(p)
3245 self.pg_enable_capture(self.pg_interfaces)
3247 self.pg1.get_capture(1)
3249 # ACK packet out -> in
3250 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3251 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3252 TCP(sport=ext_port, dport=out_port,
3253 flags="A", seq=101, ack=301))
3254 self.pg1.add_stream(p)
3255 self.pg_enable_capture(self.pg_interfaces)
3257 self.pg0.get_capture(1)
3259 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3260 self.assertEqual(len(sessions) - session_n, 1)
3262 out2in_drops = self.get_err_counter(
3263 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3264 in2out_drops = self.get_err_counter(
3265 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3267 # extra FIN packet out -> in - this should be dropped
3268 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3269 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3270 TCP(sport=ext_port, dport=out_port,
3271 flags="FA", seq=300, ack=101))
3273 self.pg1.add_stream(p)
3274 self.pg_enable_capture(self.pg_interfaces)
3276 self.pg0.assert_nothing_captured()
3278 # extra ACK packet in -> out - this should be dropped
3279 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3280 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3281 TCP(sport=in_port, dport=ext_port,
3282 flags="A", seq=101, ack=301))
3283 self.pg0.add_stream(p)
3284 self.pg_enable_capture(self.pg_interfaces)
3286 self.pg1.assert_nothing_captured()
3288 stats = self.get_err_counter(
3289 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3290 self.assertEqual(stats - out2in_drops, 1)
3291 stats = self.get_err_counter(
3292 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3293 self.assertEqual(stats - in2out_drops, 1)
3296 # extra ACK packet in -> out - this will cause session to be wiped
3297 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3298 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3299 TCP(sport=in_port, dport=ext_port,
3300 flags="A", seq=101, ack=301))
3301 self.pg0.add_stream(p)
3302 self.pg_enable_capture(self.pg_interfaces)
3304 self.pg1.assert_nothing_captured()
3305 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3306 self.assertEqual(len(sessions) - session_n, 0)
3308 def test_tcp_session_close_simultaneous(self):
3309 """ NAT44ED Close TCP session from inside network """
3311 in_port = self.tcp_port_in
3314 self.nat_add_address(self.nat_addr)
3315 self.nat_add_inside_interface(self.pg0)
3316 self.nat_add_outside_interface(self.pg1)
3317 self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
3318 in_port, ext_port, proto=IP_PROTOS.tcp,
3319 flags=self.config_flags.NAT_IS_TWICE_NAT)
3321 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3322 session_n = len(sessions)
3324 self.vapi.nat_set_timeouts(udp=300, tcp_established=7440,
3325 tcp_transitory=2, icmp=5)
3327 out_port = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port)
3329 # FIN packet in -> out
3330 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3331 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3332 TCP(sport=in_port, dport=ext_port,
3333 flags="FA", seq=100, ack=300))
3334 self.pg0.add_stream(p)
3335 self.pg_enable_capture(self.pg_interfaces)
3337 self.pg1.get_capture(1)
3339 # FIN packet out -> in
3340 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3341 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3342 TCP(sport=ext_port, dport=out_port,
3343 flags="FA", seq=300, ack=100))
3344 self.pg1.add_stream(p)
3345 self.pg_enable_capture(self.pg_interfaces)
3347 self.pg0.get_capture(1)
3349 # ACK packet in -> out
3350 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3351 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3352 TCP(sport=in_port, dport=ext_port,
3353 flags="A", seq=101, ack=301))
3354 self.pg0.add_stream(p)
3355 self.pg_enable_capture(self.pg_interfaces)
3357 self.pg1.get_capture(1)
3359 # ACK packet out -> in
3360 p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
3361 IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
3362 TCP(sport=ext_port, dport=out_port,
3363 flags="A", seq=301, ack=101))
3364 self.pg1.add_stream(p)
3365 self.pg_enable_capture(self.pg_interfaces)
3367 self.pg0.get_capture(1)
3369 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3370 self.assertEqual(len(sessions) - session_n, 1)
3372 out2in_drops = self.get_err_counter(
3373 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3374 in2out_drops = self.get_err_counter(
3375 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3377 # extra FIN packet out -> in - this should be dropped
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="FA", seq=300, ack=101))
3383 self.pg1.add_stream(p)
3384 self.pg_enable_capture(self.pg_interfaces)
3386 self.pg0.assert_nothing_captured()
3388 # extra ACK packet in -> out - this should be dropped
3389 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3390 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3391 TCP(sport=in_port, dport=ext_port,
3392 flags="A", seq=101, ack=301))
3393 self.pg0.add_stream(p)
3394 self.pg_enable_capture(self.pg_interfaces)
3396 self.pg1.assert_nothing_captured()
3398 stats = self.get_err_counter(
3399 '/err/nat44-ed-out2in/drops due to TCP in transitory timeout')
3400 self.assertEqual(stats - out2in_drops, 1)
3401 stats = self.get_err_counter(
3402 '/err/nat44-ed-in2out/drops due to TCP in transitory timeout')
3403 self.assertEqual(stats - in2out_drops, 1)
3406 # extra ACK packet in -> out - this will cause session to be wiped
3407 p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
3408 IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
3409 TCP(sport=in_port, dport=ext_port,
3410 flags="A", seq=101, ack=301))
3411 self.pg0.add_stream(p)
3412 self.pg_enable_capture(self.pg_interfaces)
3414 self.pg1.assert_nothing_captured()
3415 sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0)
3416 self.assertEqual(len(sessions) - session_n, 0)
3418 def test_dynamic_vrf(self):
3419 """ NAT44ED dynamic translation test: different VRF"""
3424 self.nat_add_address(self.nat_addr, vrf_id=vrf_id_in)
3427 self.configure_ip4_interface(self.pg7, table_id=vrf_id_in)
3428 self.configure_ip4_interface(self.pg8, table_id=vrf_id_out)
3430 self.nat_add_inside_interface(self.pg7)
3431 self.nat_add_outside_interface(self.pg8)
3433 # just basic stuff nothing special
3434 pkts = self.create_stream_in(self.pg7, self.pg8)
3435 self.pg7.add_stream(pkts)
3436 self.pg_enable_capture(self.pg_interfaces)
3438 capture = self.pg8.get_capture(len(pkts))
3439 self.verify_capture_out(capture, ignore_port=True)
3441 pkts = self.create_stream_out(self.pg8)
3442 self.pg8.add_stream(pkts)
3443 self.pg_enable_capture(self.pg_interfaces)
3445 capture = self.pg7.get_capture(len(pkts))
3446 self.verify_capture_in(capture, self.pg7)
3452 self.vapi.ip_table_add_del(is_add=0,
3453 table={'table_id': vrf_id_in})
3454 self.vapi.ip_table_add_del(is_add=0,
3455 table={'table_id': vrf_id_out})
3457 def test_dynamic_output_feature_vrf(self):
3458 """ NAT44ED dynamic translation test: output-feature, VRF"""
3460 # other then default (0)
3463 self.nat_add_address(self.nat_addr)
3464 flags = self.config_flags.NAT_IS_INSIDE
3465 self.vapi.nat44_interface_add_del_output_feature(
3466 sw_if_index=self.pg7.sw_if_index,
3467 flags=flags, is_add=1)
3468 self.vapi.nat44_interface_add_del_output_feature(
3469 sw_if_index=self.pg8.sw_if_index,
3473 self.configure_ip4_interface(self.pg7, table_id=new_vrf_id)
3474 self.configure_ip4_interface(self.pg8, table_id=new_vrf_id)
3477 tcpn = self.statistics['/nat44-ed/in2out/slowpath/tcp']
3478 udpn = self.statistics['/nat44-ed/in2out/slowpath/udp']
3479 icmpn = self.statistics['/nat44-ed/in2out/slowpath/icmp']
3480 drops = self.statistics['/nat44-ed/in2out/slowpath/drops']
3482 pkts = self.create_stream_in(self.pg7, self.pg8)
3483 self.pg7.add_stream(pkts)
3484 self.pg_enable_capture(self.pg_interfaces)
3486 capture = self.pg8.get_capture(len(pkts))
3487 self.verify_capture_out(capture, ignore_port=True)
3489 if_idx = self.pg7.sw_if_index
3490 cnt = self.statistics['/nat44-ed/in2out/slowpath/tcp']
3491 self.assertEqual(cnt[:, if_idx].sum() - tcpn[:, if_idx].sum(), 2)
3492 cnt = self.statistics['/nat44-ed/in2out/slowpath/udp']
3493 self.assertEqual(cnt[:, if_idx].sum() - udpn[:, if_idx].sum(), 1)
3494 cnt = self.statistics['/nat44-ed/in2out/slowpath/icmp']
3495 self.assertEqual(cnt[:, if_idx].sum() - icmpn[:, if_idx].sum(), 1)
3496 cnt = self.statistics['/nat44-ed/in2out/slowpath/drops']
3497 self.assertEqual(cnt[:, if_idx].sum() - drops[:, if_idx].sum(), 0)
3500 tcpn = self.statistics['/nat44-ed/out2in/fastpath/tcp']
3501 udpn = self.statistics['/nat44-ed/out2in/fastpath/udp']
3502 icmpn = self.statistics['/nat44-ed/out2in/fastpath/icmp']
3503 drops = self.statistics['/nat44-ed/out2in/fastpath/drops']
3505 pkts = self.create_stream_out(self.pg8)
3506 self.pg8.add_stream(pkts)
3507 self.pg_enable_capture(self.pg_interfaces)
3509 capture = self.pg7.get_capture(len(pkts))
3510 self.verify_capture_in(capture, self.pg7)
3512 if_idx = self.pg8.sw_if_index
3513 cnt = self.statistics['/nat44-ed/out2in/fastpath/tcp']
3514 self.assertEqual(cnt[:, if_idx].sum() - tcpn[:, if_idx].sum(), 2)
3515 cnt = self.statistics['/nat44-ed/out2in/fastpath/udp']
3516 self.assertEqual(cnt[:, if_idx].sum() - udpn[:, if_idx].sum(), 1)
3517 cnt = self.statistics['/nat44-ed/out2in/fastpath/icmp']
3518 self.assertEqual(cnt[:, if_idx].sum() - icmpn[:, if_idx].sum(), 1)
3519 cnt = self.statistics['/nat44-ed/out2in/fastpath/drops']
3520 self.assertEqual(cnt[:, if_idx].sum() - drops[:, if_idx].sum(), 0)
3522 sessions = self.statistics['/nat44-ed/total-sessions']
3523 self.assertEqual(sessions[:, 0].sum(), 3)
3529 self.vapi.ip_table_add_del(is_add=0,
3530 table={'table_id': new_vrf_id})
3532 def test_next_src_nat(self):
3533 """ NAT44ED On way back forward packet to nat44-in2out node. """
3535 twice_nat_addr = '10.0.1.3'
3538 post_twice_nat_port = 0
3540 self.vapi.nat44_forwarding_enable_disable(enable=1)
3541 self.nat_add_address(twice_nat_addr, twice_nat=1)
3542 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3543 self.config_flags.NAT_IS_SELF_TWICE_NAT)
3544 self.nat_add_static_mapping(self.pg6.remote_ip4, self.pg1.remote_ip4,
3545 local_port, external_port,
3546 proto=IP_PROTOS.tcp, vrf_id=1,
3548 self.vapi.nat44_interface_add_del_feature(
3549 sw_if_index=self.pg6.sw_if_index,
3552 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
3553 IP(src=self.pg6.remote_ip4, dst=self.pg1.remote_ip4) /
3554 TCP(sport=12345, dport=external_port))
3555 self.pg6.add_stream(p)
3556 self.pg_enable_capture(self.pg_interfaces)
3558 capture = self.pg6.get_capture(1)
3563 self.assertEqual(ip.src, twice_nat_addr)
3564 self.assertNotEqual(tcp.sport, 12345)
3565 post_twice_nat_port = tcp.sport
3566 self.assertEqual(ip.dst, self.pg6.remote_ip4)
3567 self.assertEqual(tcp.dport, local_port)
3568 self.assert_packet_checksums_valid(p)
3570 self.logger.error(ppp("Unexpected or invalid packet:", p))
3573 p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) /
3574 IP(src=self.pg6.remote_ip4, dst=twice_nat_addr) /
3575 TCP(sport=local_port, dport=post_twice_nat_port))
3576 self.pg6.add_stream(p)
3577 self.pg_enable_capture(self.pg_interfaces)
3579 capture = self.pg6.get_capture(1)
3584 self.assertEqual(ip.src, self.pg1.remote_ip4)
3585 self.assertEqual(tcp.sport, external_port)
3586 self.assertEqual(ip.dst, self.pg6.remote_ip4)
3587 self.assertEqual(tcp.dport, 12345)
3588 self.assert_packet_checksums_valid(p)
3590 self.logger.error(ppp("Unexpected or invalid packet:", p))
3593 def test_one_armed_nat44_static(self):
3594 """ NAT44ED One armed NAT and 1:1 NAPT asymmetrical rule """
3596 remote_host = self.pg4.remote_hosts[0]
3597 local_host = self.pg4.remote_hosts[1]
3602 self.vapi.nat44_forwarding_enable_disable(enable=1)
3603 self.nat_add_address(self.nat_addr, twice_nat=1)
3604 flags = (self.config_flags.NAT_IS_OUT2IN_ONLY |
3605 self.config_flags.NAT_IS_TWICE_NAT)
3606 self.nat_add_static_mapping(local_host.ip4, self.nat_addr,
3607 local_port, external_port,
3608 proto=IP_PROTOS.tcp, flags=flags)
3609 flags = self.config_flags.NAT_IS_INSIDE
3610 self.vapi.nat44_interface_add_del_feature(
3611 sw_if_index=self.pg4.sw_if_index,
3613 self.vapi.nat44_interface_add_del_feature(
3614 sw_if_index=self.pg4.sw_if_index,
3615 flags=flags, is_add=1)
3617 # from client to service
3618 p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
3619 IP(src=remote_host.ip4, dst=self.nat_addr) /
3620 TCP(sport=12345, dport=external_port))
3621 self.pg4.add_stream(p)
3622 self.pg_enable_capture(self.pg_interfaces)
3624 capture = self.pg4.get_capture(1)
3629 self.assertEqual(ip.dst, local_host.ip4)
3630 self.assertEqual(ip.src, self.nat_addr)
3631 self.assertEqual(tcp.dport, local_port)
3632 self.assertNotEqual(tcp.sport, 12345)
3633 eh_port_in = tcp.sport
3634 self.assert_packet_checksums_valid(p)
3636 self.logger.error(ppp("Unexpected or invalid packet:", p))
3639 # from service back to client
3640 p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
3641 IP(src=local_host.ip4, dst=self.nat_addr) /
3642 TCP(sport=local_port, dport=eh_port_in))
3643 self.pg4.add_stream(p)
3644 self.pg_enable_capture(self.pg_interfaces)
3646 capture = self.pg4.get_capture(1)
3651 self.assertEqual(ip.src, self.nat_addr)
3652 self.assertEqual(ip.dst, remote_host.ip4)
3653 self.assertEqual(tcp.sport, external_port)
3654 self.assertEqual(tcp.dport, 12345)
3655 self.assert_packet_checksums_valid(p)
3657 self.logger.error(ppp("Unexpected or invalid packet:", p))
3661 if __name__ == '__main__':
3662 unittest.main(testRunner=VppTestRunner)