| Matus Fabian | de88675 | 2016-12-07 03:38:19 -0800 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | |
| 3 | import socket |
| 4 | import unittest |
| 5 | from logging import * |
| 6 | |
| 7 | from framework import VppTestCase, VppTestRunner |
| 8 | |
| 9 | from scapy.layers.inet import IP, TCP, UDP, ICMP |
| 10 | from scapy.layers.l2 import Ether |
| 11 | |
| 12 | |
| 13 | class TestSNAT(VppTestCase): |
| 14 | """ SNAT Test Cases """ |
| 15 | |
| 16 | @classmethod |
| 17 | def setUpClass(cls): |
| 18 | super(TestSNAT, cls).setUpClass() |
| 19 | |
| 20 | try: |
| 21 | cls.tcp_port_in = 6303 |
| 22 | cls.tcp_port_out = 6303 |
| 23 | cls.udp_port_in = 6304 |
| 24 | cls.udp_port_out = 6304 |
| 25 | cls.icmp_id_in = 6305 |
| 26 | cls.icmp_id_out = 6305 |
| 27 | cls.snat_addr = '10.0.0.3' |
| 28 | |
| 29 | cls.create_pg_interfaces(range(7)) |
| 30 | cls.interfaces = list(cls.pg_interfaces[0:4]) |
| 31 | |
| 32 | for i in cls.interfaces: |
| 33 | i.admin_up() |
| 34 | i.config_ip4() |
| 35 | i.resolve_arp() |
| 36 | |
| 37 | cls.overlapping_interfaces = list(list(cls.pg_interfaces[4:7])) |
| 38 | |
| 39 | for i in cls.overlapping_interfaces: |
| 40 | i._local_ip4 = "172.16.255.1" |
| 41 | i._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4) |
| 42 | i._remote_hosts[0]._ip4 = "172.16.255.2" |
| 43 | i.set_table_ip4(i.sw_if_index) |
| 44 | i.config_ip4() |
| 45 | i.admin_up() |
| 46 | i.resolve_arp() |
| 47 | |
| 48 | except Exception: |
| 49 | super(TestSNAT, cls).tearDownClass() |
| 50 | raise |
| 51 | |
| 52 | def create_stream_in(self, in_if, out_if): |
| 53 | """ |
| 54 | Create packet stream for inside network |
| 55 | |
| 56 | :param in_if: Inside interface |
| 57 | :param out_if: Outside interface |
| 58 | """ |
| 59 | pkts = [] |
| 60 | # TCP |
| 61 | p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / |
| 62 | IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) / |
| 63 | TCP(sport=self.tcp_port_in)) |
| 64 | pkts.append(p) |
| 65 | |
| 66 | # UDP |
| 67 | p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / |
| 68 | IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) / |
| 69 | UDP(sport=self.udp_port_in)) |
| 70 | pkts.append(p) |
| 71 | |
| 72 | # ICMP |
| 73 | p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / |
| 74 | IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) / |
| 75 | ICMP(id=self.icmp_id_in, type='echo-request')) |
| 76 | pkts.append(p) |
| 77 | |
| 78 | return pkts |
| 79 | |
| 80 | def create_stream_out(self, out_if, dst_ip=None): |
| 81 | """ |
| 82 | Create packet stream for outside network |
| 83 | |
| 84 | :param out_if: Outside interface |
| 85 | :param dst_ip: Destination IP address (Default use global SNAT address) |
| 86 | """ |
| 87 | if dst_ip is None: |
| 88 | dst_ip=self.snat_addr |
| 89 | pkts = [] |
| 90 | # TCP |
| 91 | p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / |
| 92 | IP(src=out_if.remote_ip4, dst=dst_ip) / |
| 93 | TCP(dport=self.tcp_port_out)) |
| 94 | pkts.append(p) |
| 95 | |
| 96 | # UDP |
| 97 | p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / |
| 98 | IP(src=out_if.remote_ip4, dst=dst_ip) / |
| 99 | UDP(dport=self.udp_port_out)) |
| 100 | pkts.append(p) |
| 101 | |
| 102 | # ICMP |
| 103 | p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / |
| 104 | IP(src=out_if.remote_ip4, dst=dst_ip) / |
| 105 | ICMP(id=self.icmp_id_out, type='echo-reply')) |
| 106 | pkts.append(p) |
| 107 | |
| 108 | return pkts |
| 109 | |
| 110 | def verify_capture_out(self, capture, nat_ip=None, same_port=False, |
| 111 | packet_num=3): |
| 112 | """ |
| 113 | Verify captured packets on outside network |
| 114 | |
| 115 | :param capture: Captured packets |
| 116 | :param nat_ip: Translated IP address (Default use global SNAT address) |
| 117 | :param same_port: Sorce port number is not translated (Default False) |
| 118 | :param packet_num: Expected number of packets (Default 3) |
| 119 | """ |
| 120 | if nat_ip is None: |
| 121 | nat_ip = self.snat_addr |
| 122 | self.assertEqual(packet_num, len(capture)) |
| 123 | for packet in capture: |
| 124 | try: |
| 125 | self.assertEqual(packet[IP].src, nat_ip) |
| 126 | if packet.haslayer(TCP): |
| 127 | if same_port: |
| 128 | self.assertEqual(packet[TCP].sport, self.tcp_port_in) |
| 129 | else: |
| 130 | self.assertNotEqual(packet[TCP].sport, self.tcp_port_in) |
| 131 | self.tcp_port_out = packet[TCP].sport |
| 132 | elif packet.haslayer(UDP): |
| 133 | if same_port: |
| 134 | self.assertEqual(packet[UDP].sport, self.udp_port_in) |
| 135 | else: |
| 136 | self.assertNotEqual(packet[UDP].sport, self.udp_port_in) |
| 137 | self.udp_port_out = packet[UDP].sport |
| 138 | else: |
| 139 | if same_port: |
| 140 | self.assertEqual(packet[ICMP].id, self.icmp_id_in) |
| 141 | else: |
| 142 | self.assertNotEqual(packet[ICMP].id, self.icmp_id_in) |
| 143 | self.icmp_id_out = packet[ICMP].id |
| 144 | except: |
| 145 | error("Unexpected or invalid packet (outside network):") |
| 146 | error(packet.show()) |
| 147 | raise |
| 148 | |
| 149 | def verify_capture_in(self, capture, in_if, packet_num=3): |
| 150 | """ |
| 151 | Verify captured packets on inside network |
| 152 | |
| 153 | :param capture: Captured packets |
| 154 | :param in_if: Inside interface |
| 155 | :param packet_num: Expected number of packets (Default 3) |
| 156 | """ |
| 157 | self.assertEqual(packet_num, len(capture)) |
| 158 | for packet in capture: |
| 159 | try: |
| 160 | self.assertEqual(packet[IP].dst, in_if.remote_ip4) |
| 161 | if packet.haslayer(TCP): |
| 162 | self.assertEqual(packet[TCP].dport, self.tcp_port_in) |
| 163 | elif packet.haslayer(UDP): |
| 164 | self.assertEqual(packet[UDP].dport, self.udp_port_in) |
| 165 | else: |
| 166 | self.assertEqual(packet[ICMP].id, self.icmp_id_in) |
| 167 | except: |
| 168 | error("Unexpected or invalid packet (inside network):") |
| 169 | error(packet.show()) |
| 170 | raise |
| 171 | |
| 172 | def clear_snat(self): |
| 173 | """ |
| 174 | Clear SNAT configuration. |
| 175 | """ |
| 176 | interfaces = self.vapi.snat_interface_dump() |
| 177 | for intf in interfaces: |
| 178 | self.vapi.snat_interface_add_del_feature(intf.sw_if_index, |
| 179 | intf.is_inside, |
| 180 | is_add=0) |
| 181 | |
| 182 | static_mappings = self.vapi.snat_static_mapping_dump() |
| 183 | for sm in static_mappings: |
| 184 | self.vapi.snat_add_static_mapping(sm.local_ip_address, |
| 185 | sm.external_ip_address, |
| 186 | local_port=sm.local_port, |
| 187 | external_port=sm.external_port, |
| 188 | addr_only=sm.addr_only, |
| 189 | vrf_id=sm.vrf_id, |
| 190 | is_add=0) |
| 191 | |
| 192 | adresses = self.vapi.snat_address_dump() |
| 193 | for addr in adresses: |
| 194 | self.vapi.snat_add_address_range(addr.ip_address, |
| 195 | addr.ip_address, |
| 196 | is_add=0) |
| 197 | |
| 198 | def snat_add_static_mapping(self, local_ip, external_ip, local_port=0, |
| 199 | external_port=0, vrf_id=0, is_add=1): |
| 200 | """ |
| 201 | Add/delete S-NAT static mapping |
| 202 | |
| 203 | :param local_ip: Local IP address |
| 204 | :param external_ip: External IP address |
| 205 | :param local_port: Local port number (Optional) |
| 206 | :param external_port: External port number (Optional) |
| 207 | :param vrf_id: VRF ID (Default 0) |
| 208 | :param is_add: 1 if add, 0 if delete (Default add) |
| 209 | """ |
| 210 | addr_only = 1 |
| 211 | if local_port and external_port: |
| 212 | addr_only = 0 |
| 213 | l_ip = socket.inet_pton(socket.AF_INET, local_ip) |
| 214 | e_ip = socket.inet_pton(socket.AF_INET, external_ip) |
| 215 | self.vapi.snat_add_static_mapping(l_ip, e_ip, local_port, external_port, |
| 216 | addr_only, vrf_id, is_add) |
| 217 | |
| 218 | def snat_add_address(self, ip, is_add=1): |
| 219 | """ |
| 220 | Add/delete S-NAT address |
| 221 | |
| 222 | :param ip: IP address |
| 223 | :param is_add: 1 if add, 0 if delete (Default add) |
| 224 | """ |
| 225 | snat_addr = socket.inet_pton(socket.AF_INET, ip) |
| 226 | self.vapi.snat_add_address_range(snat_addr, snat_addr, is_add) |
| 227 | |
| 228 | def test_dynamic(self): |
| 229 | """ SNAT dynamic translation test """ |
| 230 | |
| 231 | self.snat_add_address(self.snat_addr) |
| 232 | self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index) |
| 233 | self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index, |
| 234 | is_inside=0) |
| 235 | |
| 236 | # in2out |
| 237 | pkts = self.create_stream_in(self.pg0, self.pg1) |
| 238 | self.pg0.add_stream(pkts) |
| 239 | self.pg_enable_capture(self.pg_interfaces) |
| 240 | self.pg_start() |
| 241 | capture = self.pg1.get_capture() |
| 242 | self.verify_capture_out(capture) |
| 243 | |
| 244 | # out2in |
| 245 | pkts = self.create_stream_out(self.pg1) |
| 246 | self.pg1.add_stream(pkts) |
| 247 | self.pg_enable_capture(self.pg_interfaces) |
| 248 | self.pg_start() |
| 249 | capture = self.pg0.get_capture() |
| 250 | self.verify_capture_in(capture, self.pg0) |
| 251 | |
| 252 | def test_static_in(self): |
| 253 | """ SNAT 1:1 NAT initialized from inside network """ |
| 254 | |
| 255 | nat_ip = "10.0.0.10" |
| 256 | self.tcp_port_out = 6303 |
| 257 | self.udp_port_out = 6304 |
| 258 | self.icmp_id_out = 6305 |
| 259 | |
| 260 | self.snat_add_static_mapping(self.pg0.remote_ip4, nat_ip) |
| 261 | self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index) |
| 262 | self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index, |
| 263 | is_inside=0) |
| 264 | |
| 265 | # in2out |
| 266 | pkts = self.create_stream_in(self.pg0, self.pg1) |
| 267 | self.pg0.add_stream(pkts) |
| 268 | self.pg_enable_capture(self.pg_interfaces) |
| 269 | self.pg_start() |
| 270 | capture = self.pg1.get_capture() |
| 271 | self.verify_capture_out(capture, nat_ip, True) |
| 272 | |
| 273 | # out2in |
| 274 | pkts = self.create_stream_out(self.pg1, nat_ip) |
| 275 | self.pg1.add_stream(pkts) |
| 276 | self.pg_enable_capture(self.pg_interfaces) |
| 277 | self.pg_start() |
| 278 | capture = self.pg0.get_capture() |
| 279 | self.verify_capture_in(capture, self.pg0) |
| 280 | |
| 281 | def test_static_out(self): |
| 282 | """ SNAT 1:1 NAT initialized from outside network """ |
| 283 | |
| 284 | nat_ip = "10.0.0.20" |
| 285 | self.tcp_port_out = 6303 |
| 286 | self.udp_port_out = 6304 |
| 287 | self.icmp_id_out = 6305 |
| 288 | |
| 289 | self.snat_add_static_mapping(self.pg0.remote_ip4, nat_ip) |
| 290 | self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index) |
| 291 | self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index, |
| 292 | is_inside=0) |
| 293 | |
| 294 | # out2in |
| 295 | pkts = self.create_stream_out(self.pg1, nat_ip) |
| 296 | self.pg1.add_stream(pkts) |
| 297 | self.pg_enable_capture(self.pg_interfaces) |
| 298 | self.pg_start() |
| 299 | capture = self.pg0.get_capture() |
| 300 | self.verify_capture_in(capture, self.pg0) |
| 301 | |
| 302 | # in2out |
| 303 | pkts = self.create_stream_in(self.pg0, self.pg1) |
| 304 | self.pg0.add_stream(pkts) |
| 305 | self.pg_enable_capture(self.pg_interfaces) |
| 306 | self.pg_start() |
| 307 | capture = self.pg1.get_capture() |
| 308 | self.verify_capture_out(capture, nat_ip, True) |
| 309 | |
| 310 | def test_static_with_port_in(self): |
| 311 | """ SNAT 1:1 NAT with port initialized from inside network """ |
| 312 | |
| 313 | self.tcp_port_out = 3606 |
| 314 | self.udp_port_out = 3607 |
| 315 | self.icmp_id_out = 3608 |
| 316 | |
| 317 | self.snat_add_address(self.snat_addr) |
| 318 | self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr, |
| 319 | self.tcp_port_in, self.tcp_port_out) |
| 320 | self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr, |
| 321 | self.udp_port_in, self.udp_port_out) |
| 322 | self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr, |
| 323 | self.icmp_id_in, self.icmp_id_out) |
| 324 | self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index) |
| 325 | self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index, |
| 326 | is_inside=0) |
| 327 | |
| 328 | # in2out |
| 329 | pkts = self.create_stream_in(self.pg0, self.pg1) |
| 330 | self.pg0.add_stream(pkts) |
| 331 | self.pg_enable_capture(self.pg_interfaces) |
| 332 | self.pg_start() |
| 333 | capture = self.pg1.get_capture() |
| 334 | self.verify_capture_out(capture) |
| 335 | |
| 336 | # out2in |
| 337 | pkts = self.create_stream_out(self.pg1) |
| 338 | self.pg1.add_stream(pkts) |
| 339 | self.pg_enable_capture(self.pg_interfaces) |
| 340 | self.pg_start() |
| 341 | capture = self.pg0.get_capture() |
| 342 | self.verify_capture_in(capture, self.pg0) |
| 343 | |
| 344 | def test_static_with_port_out(self): |
| 345 | """ SNAT 1:1 NAT with port initialized from outside network """ |
| 346 | |
| 347 | self.tcp_port_out = 30606 |
| 348 | self.udp_port_out = 30607 |
| 349 | self.icmp_id_out = 30608 |
| 350 | |
| 351 | self.snat_add_address(self.snat_addr) |
| 352 | self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr, |
| 353 | self.tcp_port_in, self.tcp_port_out) |
| 354 | self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr, |
| 355 | self.udp_port_in, self.udp_port_out) |
| 356 | self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr, |
| 357 | self.icmp_id_in, self.icmp_id_out) |
| 358 | self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index) |
| 359 | self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index, |
| 360 | is_inside=0) |
| 361 | |
| 362 | # out2in |
| 363 | pkts = self.create_stream_out(self.pg1) |
| 364 | self.pg1.add_stream(pkts) |
| 365 | self.pg_enable_capture(self.pg_interfaces) |
| 366 | self.pg_start() |
| 367 | capture = self.pg0.get_capture() |
| 368 | self.verify_capture_in(capture, self.pg0) |
| 369 | |
| 370 | # in2out |
| 371 | pkts = self.create_stream_in(self.pg0, self.pg1) |
| 372 | self.pg0.add_stream(pkts) |
| 373 | self.pg_enable_capture(self.pg_interfaces) |
| 374 | self.pg_start() |
| 375 | capture = self.pg1.get_capture() |
| 376 | self.verify_capture_out(capture) |
| 377 | |
| 378 | def test_static_vrf_aware(self): |
| 379 | """ SNAT 1:1 NAT VRF awareness """ |
| 380 | |
| 381 | nat_ip1 = "10.0.0.30" |
| 382 | nat_ip2 = "10.0.0.40" |
| 383 | self.tcp_port_out = 6303 |
| 384 | self.udp_port_out = 6304 |
| 385 | self.icmp_id_out = 6305 |
| 386 | |
| 387 | self.snat_add_static_mapping(self.pg4.remote_ip4, nat_ip1, |
| 388 | vrf_id=self.pg4.sw_if_index) |
| 389 | self.snat_add_static_mapping(self.pg0.remote_ip4, nat_ip2, |
| 390 | vrf_id=self.pg4.sw_if_index) |
| 391 | self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index, |
| 392 | is_inside=0) |
| 393 | self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index) |
| 394 | self.vapi.snat_interface_add_del_feature(self.pg4.sw_if_index) |
| 395 | |
| 396 | # inside interface VRF match SNAT static mapping VRF |
| 397 | pkts = self.create_stream_in(self.pg4, self.pg3) |
| 398 | self.pg4.add_stream(pkts) |
| 399 | self.pg_enable_capture(self.pg_interfaces) |
| 400 | self.pg_start() |
| 401 | capture = self.pg3.get_capture() |
| 402 | self.verify_capture_out(capture, nat_ip1, True) |
| 403 | |
| 404 | # inside interface VRF don't match SNAT static mapping VRF (packets |
| 405 | # are dropped) |
| 406 | pkts = self.create_stream_in(self.pg0, self.pg3) |
| 407 | self.pg0.add_stream(pkts) |
| 408 | self.pg_enable_capture(self.pg_interfaces) |
| 409 | self.pg_start() |
| 410 | capture = self.pg3.get_capture() |
| 411 | self.verify_capture_out(capture, packet_num=0) |
| 412 | |
| 413 | def test_multiple_inside_interfaces(self): |
| 414 | """ SNAT multiple inside interfaces with non-overlapping address space """ |
| 415 | |
| 416 | self.snat_add_address(self.snat_addr) |
| 417 | self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index) |
| 418 | self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index) |
| 419 | self.vapi.snat_interface_add_del_feature(self.pg2.sw_if_index) |
| 420 | self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index, |
| 421 | is_inside=0) |
| 422 | |
| 423 | # in2out 1st interface |
| 424 | pkts = self.create_stream_in(self.pg0, self.pg3) |
| 425 | self.pg0.add_stream(pkts) |
| 426 | self.pg_enable_capture(self.pg_interfaces) |
| 427 | self.pg_start() |
| 428 | capture = self.pg3.get_capture() |
| 429 | self.verify_capture_out(capture) |
| 430 | |
| 431 | # out2in 1st interface |
| 432 | pkts = self.create_stream_out(self.pg3) |
| 433 | self.pg3.add_stream(pkts) |
| 434 | self.pg_enable_capture(self.pg_interfaces) |
| 435 | self.pg_start() |
| 436 | capture = self.pg0.get_capture() |
| 437 | self.verify_capture_in(capture, self.pg0) |
| 438 | |
| 439 | # in2out 2nd interface |
| 440 | pkts = self.create_stream_in(self.pg1, self.pg3) |
| 441 | self.pg1.add_stream(pkts) |
| 442 | self.pg_enable_capture(self.pg_interfaces) |
| 443 | self.pg_start() |
| 444 | capture = self.pg3.get_capture() |
| 445 | self.verify_capture_out(capture) |
| 446 | |
| 447 | # out2in 2nd interface |
| 448 | pkts = self.create_stream_out(self.pg3) |
| 449 | self.pg3.add_stream(pkts) |
| 450 | self.pg_enable_capture(self.pg_interfaces) |
| 451 | self.pg_start() |
| 452 | capture = self.pg1.get_capture() |
| 453 | self.verify_capture_in(capture, self.pg1) |
| 454 | |
| 455 | # in2out 3rd interface |
| 456 | pkts = self.create_stream_in(self.pg2, self.pg3) |
| 457 | self.pg2.add_stream(pkts) |
| 458 | self.pg_enable_capture(self.pg_interfaces) |
| 459 | self.pg_start() |
| 460 | capture = self.pg3.get_capture() |
| 461 | self.verify_capture_out(capture) |
| 462 | |
| 463 | # out2in 3rd interface |
| 464 | pkts = self.create_stream_out(self.pg3) |
| 465 | self.pg3.add_stream(pkts) |
| 466 | self.pg_enable_capture(self.pg_interfaces) |
| 467 | self.pg_start() |
| 468 | capture = self.pg2.get_capture() |
| 469 | self.verify_capture_in(capture, self.pg2) |
| 470 | |
| 471 | def test_inside_overlapping_interfaces(self): |
| 472 | """ SNAT multiple inside interfaces with overlapping address space """ |
| 473 | |
| 474 | self.snat_add_address(self.snat_addr) |
| 475 | self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index, |
| 476 | is_inside=0) |
| 477 | self.vapi.snat_interface_add_del_feature(self.pg4.sw_if_index) |
| 478 | self.vapi.snat_interface_add_del_feature(self.pg5.sw_if_index) |
| 479 | self.vapi.snat_interface_add_del_feature(self.pg6.sw_if_index) |
| 480 | |
| 481 | # in2out 1st interface |
| 482 | pkts = self.create_stream_in(self.pg4, self.pg3) |
| 483 | self.pg4.add_stream(pkts) |
| 484 | self.pg_enable_capture(self.pg_interfaces) |
| 485 | self.pg_start() |
| 486 | capture = self.pg3.get_capture() |
| 487 | self.verify_capture_out(capture) |
| 488 | |
| 489 | # out2in 1st interface |
| 490 | pkts = self.create_stream_out(self.pg3) |
| 491 | self.pg3.add_stream(pkts) |
| 492 | self.pg_enable_capture(self.pg_interfaces) |
| 493 | self.pg_start() |
| 494 | capture = self.pg4.get_capture() |
| 495 | self.verify_capture_in(capture, self.pg4) |
| 496 | |
| 497 | # in2out 2nd interface |
| 498 | pkts = self.create_stream_in(self.pg5, self.pg3) |
| 499 | self.pg5.add_stream(pkts) |
| 500 | self.pg_enable_capture(self.pg_interfaces) |
| 501 | self.pg_start() |
| 502 | capture = self.pg3.get_capture() |
| 503 | self.verify_capture_out(capture) |
| 504 | |
| 505 | # out2in 2nd interface |
| 506 | pkts = self.create_stream_out(self.pg3) |
| 507 | self.pg3.add_stream(pkts) |
| 508 | self.pg_enable_capture(self.pg_interfaces) |
| 509 | self.pg_start() |
| 510 | capture = self.pg5.get_capture() |
| 511 | self.verify_capture_in(capture, self.pg5) |
| 512 | |
| 513 | # in2out 3rd interface |
| 514 | pkts = self.create_stream_in(self.pg6, self.pg3) |
| 515 | self.pg6.add_stream(pkts) |
| 516 | self.pg_enable_capture(self.pg_interfaces) |
| 517 | self.pg_start() |
| 518 | capture = self.pg3.get_capture() |
| 519 | self.verify_capture_out(capture) |
| 520 | |
| 521 | # out2in 3rd interface |
| 522 | pkts = self.create_stream_out(self.pg3) |
| 523 | self.pg3.add_stream(pkts) |
| 524 | self.pg_enable_capture(self.pg_interfaces) |
| 525 | self.pg_start() |
| 526 | capture = self.pg6.get_capture() |
| 527 | self.verify_capture_in(capture, self.pg6) |
| 528 | |
| 529 | def tearDown(self): |
| 530 | super(TestSNAT, self).tearDown() |
| 531 | if not self.vpp_dead: |
| 532 | self.logger.info(self.vapi.cli("show snat verbose")) |
| 533 | self.clear_snat() |
| 534 | |
| 535 | if __name__ == '__main__': |
| 536 | unittest.main(testRunner=VppTestRunner) |