test/test_vm_vpp_interfaces.py

   1 #!/usr/bin/env python3
   2 import unittest
   3 from ipaddress import ip_address, ip_interface
   4 from vpp_qemu_utils import (
   5     create_namespace,
   6     delete_namespace,
   7     create_host_interface,
   8     delete_host_interfaces,
   9     set_interface_mtu,
  10     disable_interface_gso,
  11     add_namespace_route,
  12 )
  13 from vpp_iperf import start_iperf, stop_iperf
  14 from framework import VppTestCase, VppTestRunner
  15 from config import config
  16 from vpp_papi import VppEnum
  17 import time
  18 import sys
  19 from vm_test_config import test_config
  20
  21 #
  22 # Tests for:
  23 # - tapv2, tunv2 & af_packet_v2 & v3 interfaces.
  24 # - reads test config from the file vm_test_config.py
  25 # - Uses iPerf to send TCP/IP streams to VPP
  26 #   - VPP ingress interface runs the iperf client
  27 #   - VPP egress interface runs the iperf server
  28 # - Runs tests specified in the vm_test_config module and verifies that:
  29 #   - TCP over IPv4 and IPv6 is enabled correctly for Bridged and Routed topologies.
  30 #     sending jumbo frames (9000/9001 MTUs) with GSO/GRO is enabled correctly.
  31 #     sending VPP buffer-sized frames(2048 MTU) with GSO/GRO is enabled correctly.
  32 #     sending standard frames (1500 MTU) with GSO/GRO is enabled correctly.
  33 #     sending smaller frames (512 MTU) with GSO/GRO is enabled correctly for IPv4
  34 #     sending odd sized frames (9001, 2049 MTU) with GSO/GRO is enabled correctly.
  35 #
  36
  37
  38 def filter_tests(test):
  39     """Filter test IDs to include only those selected to run."""
  40     selection = test_config["tests_to_run"]
  41     if not selection or selection == " ":
  42         return True
  43     else:
  44         test_ids_to_run = []
  45         for test_id in selection.split(","):
  46             if "-" in test_id.strip():
  47                 start, end = map(int, test_id.split("-"))
  48                 test_ids_to_run.extend(list(range(start, end + 1)))
  49             elif test_id.strip():
  50                 test_ids_to_run.append(int(test_id))
  51         return test["id"] in test_ids_to_run
  52
  53
  54 # Test Config variables
  55 client_namespace = test_config["client_namespace"]
  56 server_namespace = test_config["server_namespace"]
  57 tests = filter(filter_tests, test_config["tests"])
  58 af_packet_config = test_config["af_packet"]
  59 layer2 = test_config["L2"]
  60 layer3 = test_config["L3"]
  61
  62
  63 def create_test(test_name, test, ip_version, mtu):
  64     """Create and return a unittest method for a test."""
  65
  66     def test_func(self):
  67         self.logger.debug(f"Starting unittest:{test_name}")
  68         self.setUpTestToplogy(test=test, ip_version=ip_version)
  69         result = self.set_interfaces_mtu(
  70             mtu=mtu,
  71             ip_version=ip_version,
  72             vpp_interfaces=self.vpp_interfaces,
  73             linux_interfaces=self.linux_interfaces,
  74         )
  75         # Start the Iperf server in dual stack mode & run iperf client
  76         if result is True:
  77             start_iperf(ip_version=6, server_only=True, logger=self.logger)
  78             self.assertTrue(
  79                 start_iperf(
  80                     ip_version=ip_version,
  81                     server_ipv4_address=self.server_ip4_address,
  82                     server_ipv6_address=self.server_ip6_address,
  83                     client_only=True,
  84                     duration=2,
  85                     logger=self.logger,
  86                 )
  87             )
  88         else:
  89             print(
  90                 f"Skipping test:{test_name} as mtu:{mtu} is "
  91                 f"invalid for TCP/IPv{ip_version}"
  92             )
  93
  94     test_func.__name__ = test_name
  95     return test_func
  96
  97
  98 def generate_vpp_interface_tests():
  99     """Generate unittests for testing vpp interfaces."""
 100     for test in tests:
 101         for ip_version in test_config["ip_versions"]:
 102             for mtu in test_config["mtus"]:
 103                 test_name = (
 104                     f"test_id_{test['id']}_"
 105                     + f"client_{test['client_if_type']}"
 106                     + f"_v{test['client_if_version']}_"
 107                     + f"gso_{test.get('client_if_gso', 0)}_"
 108                     + f"gro_{test.get('client_if_gro', 0)}_"
 109                     + f"to_server_{test['server_if_type']}"
 110                     + f"_v{test['server_if_version']}_"
 111                     + f"gso_{test.get('server_if_gso', 0)}_"
 112                     + f"gro_{test.get('server_if_gro', 0)}_"
 113                     + f"mtu_{mtu}_mode_{test['x_connect_mode']}_"
 114                     + f"tcp_ipv{ip_version}"
 115                 )
 116                 test_func = create_test(
 117                     test_name=test_name, test=test, ip_version=ip_version, mtu=mtu
 118                 )
 119                 setattr(TestVPPInterfacesQemu, test_name, test_func)
 120
 121
 122 class TestVPPInterfacesQemu(VppTestCase):
 123     """Test VPP interfaces inside a QEMU VM for IPv4/v6.
 124
 125     Test Setup:
 126     Linux_ns1--iperfClient--host-int1--vpp-af_packet-int1--VPP-BD
 127              --vppaf_packet_int2--host-int2--iperfServer--Linux_ns2
 128     """
 129
 130     @classmethod
 131     def setUpClass(cls):
 132         super(TestVPPInterfacesQemu, cls).setUpClass()
 133
 134     @classmethod
 135     def tearDownClass(cls):
 136         super(TestVPPInterfacesQemu, cls).tearDownClass()
 137
 138     def setUpTestToplogy(self, test, ip_version):
 139         """Setup the test topology.
 140
 141         1. Create Linux Namespaces for iPerf Client & Server.
 142         2. Create VPP iPerf client and server virtual interfaces.
 143         3. Enable desired vif features such as GSO & GRO.
 144         3. Cross-Connect interfaces in VPP using L2 or L3.
 145         """
 146         super(TestVPPInterfacesQemu, self).setUp()
 147         client_if_type = test["client_if_type"]
 148         server_if_type = test["server_if_type"]
 149         client_if_version = test["client_if_version"]
 150         server_if_version = test["server_if_version"]
 151         x_connect_mode = test["x_connect_mode"]
 152         # server ip4/ip6 addresses required by iperf client
 153         server_ip4_prefix = (
 154             layer2["server_ip4_prefix"]
 155             if x_connect_mode == "L2"
 156             else layer3["server_ip4_prefix"]
 157         )
 158         server_ip6_prefix = (
 159             layer2["server_ip6_prefix"]
 160             if x_connect_mode == "L2"
 161             else layer3["server_ip6_prefix"]
 162         )
 163         self.server_ip4_address = str(ip_interface(server_ip4_prefix).ip)
 164         self.server_ip6_address = str(ip_interface(server_ip6_prefix).ip)
 165         # next-hop IP address on VPP for routing from client & server namespaces
 166         vpp_client_prefix = (
 167             layer3["vpp_client_ip4_prefix"]
 168             if ip_version == 4
 169             else layer3["vpp_client_ip6_prefix"]
 170         )
 171         vpp_client_nexthop = str(ip_interface(vpp_client_prefix).ip)
 172         vpp_server_prefix = (
 173             layer3["vpp_server_ip4_prefix"]
 174             if ip_version == 4
 175             else layer3["vpp_server_ip6_prefix"]
 176         )
 177         vpp_server_nexthop = str(ip_interface(vpp_server_prefix).ip)
 178         create_namespace([client_namespace, server_namespace])
 179         self.vpp_interfaces = []
 180         self.linux_interfaces = []
 181         enable_client_if_gso = test.get("client_if_gso", 0)
 182         enable_server_if_gso = test.get("server_if_gso", 0)
 183         enable_client_if_gro = test.get("client_if_gro", 0)
 184         enable_server_if_gro = test.get("server_if_gro", 0)
 185         ## Handle client interface types
 186         if client_if_type == "af_packet":
 187             create_host_interface(
 188                 af_packet_config["iprf_client_interface_on_linux"],
 189                 af_packet_config["iprf_client_interface_on_vpp"],
 190                 client_namespace,
 191                 layer2["client_ip4_prefix"]
 192                 if x_connect_mode == "L2"
 193                 else layer3["client_ip4_prefix"],
 194                 layer2["client_ip6_prefix"]
 195                 if x_connect_mode == "L2"
 196                 else layer3["client_ip6_prefix"],
 197             )
 198             self.ingress_if_idx = self.create_af_packet(
 199                 version=client_if_version,
 200                 host_if_name=af_packet_config["iprf_client_interface_on_vpp"],
 201                 enable_gso=enable_client_if_gso,
 202             )
 203             self.vpp_interfaces.append(self.ingress_if_idx)
 204             self.linux_interfaces.append(
 205                 ["", af_packet_config["iprf_client_interface_on_vpp"]]
 206             )
 207             self.linux_interfaces.append(
 208                 [client_namespace, af_packet_config["iprf_client_interface_on_linux"]]
 209             )
 210             if enable_client_if_gso == 0:
 211                 disable_interface_gso(
 212                     "", af_packet_config["iprf_client_interface_on_vpp"]
 213                 )
 214                 disable_interface_gso(
 215                     client_namespace, af_packet_config["iprf_client_interface_on_linux"]
 216                 )
 217         elif client_if_type == "tap" or client_if_type == "tun":
 218             self.ingress_if_idx = self.create_tap_tun(
 219                 id=101,
 220                 host_namespace=client_namespace,
 221                 ip_version=ip_version,
 222                 host_ip4_prefix=layer2["client_ip4_prefix"]
 223                 if x_connect_mode == "L2"
 224                 else layer3["client_ip4_prefix"],
 225                 host_ip6_prefix=layer2["client_ip6_prefix"]
 226                 if x_connect_mode == "L2"
 227                 else layer3["client_ip6_prefix"],
 228                 host_ip4_gw=vpp_client_nexthop
 229                 if x_connect_mode == "L3" and ip_version == 4
 230                 else None,
 231                 host_ip6_gw=vpp_client_nexthop
 232                 if x_connect_mode == "L3" and ip_version == 6
 233                 else None,
 234                 int_type=client_if_type,
 235                 host_if_name=f"{client_if_type}0",
 236                 enable_gso=enable_client_if_gso,
 237                 enable_gro=enable_client_if_gro,
 238             )
 239             self.vpp_interfaces.append(self.ingress_if_idx)
 240             self.linux_interfaces.append([client_namespace, f"{client_if_type}0"])
 241             # Seeing TCP timeouts if tx=on & rx=on Linux tap & tun interfaces
 242             disable_interface_gso(client_namespace, f"{client_if_type}0")
 243         else:
 244             print(
 245                 f"Unsupported client interface type: {client_if_type} "
 246                 f"for test - ID={test['id']}"
 247             )
 248             sys.exit(1)
 249
 250         if server_if_type == "af_packet":
 251             create_host_interface(
 252                 af_packet_config["iprf_server_interface_on_linux"],
 253                 af_packet_config["iprf_server_interface_on_vpp"],
 254                 server_namespace,
 255                 server_ip4_prefix,
 256                 server_ip6_prefix,
 257             )
 258             self.egress_if_idx = self.create_af_packet(
 259                 version=server_if_version,
 260                 host_if_name=af_packet_config["iprf_server_interface_on_vpp"],
 261                 enable_gso=enable_server_if_gso,
 262             )
 263             self.vpp_interfaces.append(self.egress_if_idx)
 264             self.linux_interfaces.append(
 265                 ["", af_packet_config["iprf_server_interface_on_vpp"]]
 266             )
 267             self.linux_interfaces.append(
 268                 [server_namespace, af_packet_config["iprf_server_interface_on_linux"]]
 269             )
 270             if enable_server_if_gso == 0:
 271                 disable_interface_gso(
 272                     "", af_packet_config["iprf_server_interface_on_vpp"]
 273                 )
 274                 disable_interface_gso(
 275                     server_namespace, af_packet_config["iprf_server_interface_on_linux"]
 276                 )
 277         elif server_if_type == "tap" or server_if_type == "tun":
 278             self.egress_if_idx = self.create_tap_tun(
 279                 id=102,
 280                 host_namespace=server_namespace,
 281                 ip_version=ip_version,
 282                 host_ip4_prefix=layer2["server_ip4_prefix"]
 283                 if x_connect_mode == "L2"
 284                 else layer3["server_ip4_prefix"],
 285                 host_ip6_prefix=layer2["server_ip6_prefix"]
 286                 if x_connect_mode == "L2"
 287                 else layer3["server_ip6_prefix"],
 288                 int_type=server_if_type,
 289                 host_if_name=f"{server_if_type}0",
 290                 enable_gso=enable_server_if_gso,
 291                 enable_gro=enable_server_if_gro,
 292             )
 293             self.vpp_interfaces.append(self.egress_if_idx)
 294             self.linux_interfaces.append([server_namespace, f"{server_if_type}0"])
 295             # Seeing TCP timeouts if tx=on & rx=on Linux tap & tun interfaces
 296             disable_interface_gso(server_namespace, f"{server_if_type}0")
 297         else:
 298             print(
 299                 f"Unsupported server interface type: {server_if_type} "
 300                 f"for test - ID={test['id']}"
 301             )
 302             sys.exit(1)
 303
 304         if x_connect_mode == "L2":
 305             self.l2_connect_interfaces(1, self.ingress_if_idx, self.egress_if_idx)
 306         elif x_connect_mode == "L3":
 307             # L3 connect client & server side
 308             vrf_id = layer3["ip4_vrf"] if ip_version == 4 else layer3["ip6_vrf"]
 309             self.l3_connect_interfaces(
 310                 ip_version,
 311                 vrf_id,
 312                 (self.ingress_if_idx, vpp_client_prefix),
 313                 (self.egress_if_idx, vpp_server_prefix),
 314             )
 315             # Setup namespace routing
 316             if ip_version == 4:
 317                 add_namespace_route(client_namespace, "0.0.0.0/0", vpp_client_nexthop)
 318                 add_namespace_route(server_namespace, "0.0.0.0/0", vpp_server_nexthop)
 319             else:
 320                 add_namespace_route(client_namespace, "::/0", vpp_client_nexthop)
 321                 add_namespace_route(server_namespace, "::/0", vpp_server_nexthop)
 322         # Wait for Linux IPv6 stack to become ready
 323         if ip_version == 6:
 324             time.sleep(2)
 325
 326     def tearDown(self):
 327         try:
 328             self.vapi.tap_delete_v2(self.ingress_if_idx)
 329         except Exception:
 330             pass
 331         try:
 332             self.vapi.tap_delete_v2(self.egress_if_idx)
 333         except Exception:
 334             pass
 335         try:
 336             for interface in self.vapi.af_packet_dump():
 337                 if (
 338                     interface.host_if_name
 339                     == af_packet_config["iprf_client_interface_on_vpp"]
 340                 ):
 341                     self.vapi.af_packet_delete(
 342                         af_packet_config["iprf_client_interface_on_vpp"]
 343                     )
 344                 elif (
 345                     interface.host_if_name
 346                     == af_packet_config["iprf_server_interface_on_vpp"]
 347                 ):
 348                     self.vapi.af_packet_delete(
 349                         af_packet_config["iprf_server_interface_on_vpp"]
 350                     )
 351         except Exception:
 352             pass
 353         try:
 354             delete_host_interfaces(
 355                 af_packet_config["iprf_client_interface_on_linux"],
 356                 af_packet_config["iprf_server_interface_on_linux"],
 357                 af_packet_config["iprf_client_interface_on_vpp"],
 358                 af_packet_config["iprf_server_interface_on_vpp"],
 359             )
 360         except Exception:
 361             pass
 362         try:
 363             self.vapi.ip_table_add_del(is_add=0, table={"table_id": layer3["ip4_vrf"]})
 364         except Exception:
 365             pass
 366         try:
 367             self.vapi.ip_table_add_del(is_add=0, table={"table_id": layer3["ip6_vrf"]})
 368         except Exception:
 369             pass
 370         try:
 371             delete_namespace(
 372                 [
 373                     client_namespace,
 374                     server_namespace,
 375                 ]
 376             )
 377         except Exception:
 378             pass
 379         try:
 380             stop_iperf()
 381         except Exception:
 382             pass
 383
 384     def create_af_packet(self, version, host_if_name, enable_gso=0):
 385         """Create an af_packetv3 interface in VPP.
 386
 387         Parameters:
 388         version -- 2 for af_packet_create_v2
 389                 -- 3 for af_packet_create_v3
 390         host_if_name -- host interface name
 391         enable_gso -- Enable GSO on the interface when True
 392         """
 393         af_packet_mode = VppEnum.vl_api_af_packet_mode_t
 394         af_packet_interface_mode = af_packet_mode.AF_PACKET_API_MODE_ETHERNET
 395         af_packet_flags = VppEnum.vl_api_af_packet_flags_t
 396         af_packet_interface_flags = af_packet_flags.AF_PACKET_API_FLAG_QDISC_BYPASS
 397         if enable_gso:
 398             af_packet_interface_flags = (
 399                 af_packet_interface_flags | af_packet_flags.AF_PACKET_API_FLAG_CKSUM_GSO
 400             )
 401         if version == 2:
 402             af_packet_interface_flags = (
 403                 af_packet_interface_flags | af_packet_flags.AF_PACKET_API_FLAG_VERSION_2
 404             )
 405         api_args = {
 406             "use_random_hw_addr": True,
 407             "host_if_name": host_if_name,
 408             "flags": af_packet_interface_flags,
 409         }
 410         api_args["mode"] = af_packet_interface_mode
 411         result = self.vapi.af_packet_create_v3(**api_args)
 412         sw_if_index = result.sw_if_index
 413         # Enable software GSO chunking when interface doesn't support GSO offload
 414         if enable_gso == 0:
 415             self.vapi.feature_gso_enable_disable(
 416                 sw_if_index=sw_if_index, enable_disable=1
 417             )
 418         else:
 419             self.vapi.feature_gso_enable_disable(
 420                 sw_if_index=sw_if_index, enable_disable=0
 421             )
 422         self.vapi.sw_interface_set_flags(sw_if_index=sw_if_index, flags=1)
 423         return sw_if_index
 424
 425     def create_tap_tun(
 426         self,
 427         id,
 428         host_namespace,
 429         ip_version,
 430         host_ip4_prefix=None,
 431         host_ip6_prefix=None,
 432         host_ip4_gw=None,
 433         host_ip6_gw=None,
 434         int_type="tap",
 435         host_if_name=None,
 436         enable_gso=0,
 437         enable_gro=0,
 438     ):
 439         """Create a tapv2 or tunv2 interface in VPP and attach to host.
 440
 441         Parameters:
 442         id -- interface ID
 443         host_namespace -- host namespace to attach the tap/tun interface to
 444         ip_version -- 4 or 6
 445         host_ip4_prefix -- ipv4 host interface address in CIDR notation
 446                            if ip_version=4
 447         host_ip6_prefix -- ipv6 host interface address in CIDR notation
 448                            if ip_version=6
 449         host_ip4_gw -- host IPv4 default gateway IP Address
 450         host_ip6_gw -- host IPv6 default gateway IP address
 451         int_type -- "tap" for tapv2  &  "tun" for tunv2 interface
 452         host_if_name -- host side interface name
 453         enable_gso -- enable GSO
 454         enable_gro -- enable GSO/GRO-Coalesce
 455         """
 456         TapFlags = VppEnum.vl_api_tap_flags_t
 457         tap_flags = 0
 458         if int_type == "tun":
 459             tap_flags = TapFlags.TAP_API_FLAG_TUN
 460             if enable_gro:
 461                 tap_flags = tap_flags | (
 462                     TapFlags.TAP_API_FLAG_GSO | TapFlags.TAP_API_FLAG_GRO_COALESCE
 463                 )
 464             elif enable_gso:
 465                 tap_flags = tap_flags | TapFlags.TAP_API_FLAG_GSO
 466         elif int_type == "tap":
 467             if enable_gro:
 468                 tap_flags = (
 469                     TapFlags.TAP_API_FLAG_GSO | TapFlags.TAP_API_FLAG_GRO_COALESCE
 470                 )
 471             elif enable_gso:
 472                 tap_flags = TapFlags.TAP_API_FLAG_GSO
 473
 474         api_args = {
 475             "id": id,
 476             "host_namespace_set": True,
 477             "host_namespace": host_namespace,
 478             "host_if_name_set": False,
 479             "host_bridge_set": False,
 480             "host_mac_addr_set": False,
 481         }
 482         if tap_flags != 0:
 483             api_args["tap_flags"] = tap_flags
 484         if ip_version == 4:
 485             api_args["host_ip4_prefix"] = ip_interface(host_ip4_prefix)
 486             api_args["host_ip4_prefix_set"] = True
 487             if host_ip4_gw:
 488                 api_args["host_ip4_gw"] = ip_address(host_ip4_gw)
 489                 api_args["host_ip4_gw_set"] = True
 490         if ip_version == 6:
 491             api_args["host_ip6_prefix"] = ip_interface(host_ip6_prefix)
 492             api_args["host_ip6_prefix_set"] = True
 493             if host_ip6_gw:
 494                 api_args["host_ip6_gw"] = ip_address(host_ip6_gw)
 495                 api_args["host_ip6_gw_set"] = True
 496         if host_if_name:
 497             api_args["host_if_name"] = host_if_name
 498             api_args["host_if_name_set"] = True
 499
 500         result = self.vapi.tap_create_v2(**api_args)
 501         sw_if_index = result.sw_if_index
 502         # Enable software GSO chunking when interface doesn't support GSO offload and
 503         # GRO coalesce
 504         if enable_gso == 0 and enable_gro == 0:
 505             self.vapi.feature_gso_enable_disable(
 506                 sw_if_index=sw_if_index, enable_disable=1
 507             )
 508         else:
 509             self.vapi.feature_gso_enable_disable(
 510                 sw_if_index=sw_if_index, enable_disable=0
 511             )
 512         # Admin up
 513         self.vapi.sw_interface_set_flags(sw_if_index=sw_if_index, flags=1)
 514         return sw_if_index
 515
 516     def dump_bridge_domain_details(self, bd_id):
 517         return self.vapi.bridge_domain_dump(bd_id=bd_id)
 518
 519     def l2_connect_interfaces(self, bridge_id, *sw_if_idxs):
 520         for if_idx in sw_if_idxs:
 521             self.vapi.sw_interface_set_l2_bridge(
 522                 rx_sw_if_index=if_idx, bd_id=bridge_id, shg=0, port_type=0, enable=True
 523             )
 524
 525     def l3_connect_interfaces(self, ip_version, vrf_id, *if_idx_ip_prefixes):
 526         """Setup routing for (if_idx, ip_prefix) inside VPP.
 527
 528         arguments:
 529         if_idx_ip_prefixes -- sequence of (if_idx, ip_prefix) tuples
 530         ip_version -- 4 or 6
 531         vrf_id -- vrf_id
 532         """
 533         is_ipv6 = 0 if ip_version == 4 else 1
 534         self.vapi.ip_table_add_del(
 535             is_add=1, table={"table_id": vrf_id, "is_ip6": is_ipv6}
 536         )
 537         for sw_if_index, ip_prefix in if_idx_ip_prefixes:
 538             self.vapi.sw_interface_set_table(
 539                 sw_if_index=sw_if_index, is_ipv6=is_ipv6, vrf_id=vrf_id
 540             )
 541             self.vapi.sw_interface_add_del_address(
 542                 sw_if_index=sw_if_index, is_add=1, prefix=ip_interface(ip_prefix)
 543             )
 544
 545     def set_interfaces_mtu(self, mtu, ip_version, **kwargs):
 546         """Set MTUs on VPP and Linux interfaces.
 547
 548         arguments --
 549         mtu -- mtu value
 550         ip_version - 4 or 6
 551         kwargs['vpp_interfaces'] -- list of vpp interface if indexes
 552         kwargs['linux_interfaces'] -- list of tuples (namespace, interface_names)
 553         return True if mtu is set, else False
 554         """
 555         vpp_interfaces = kwargs.get("vpp_interfaces")
 556         linux_interfaces = kwargs.get("linux_interfaces")
 557         # IPv6 on Linux requires an MTU value >=1280
 558         if (ip_version == 6 and mtu >= 1280) or ip_version == 4:
 559             for sw_if_idx in vpp_interfaces:
 560                 self.vapi.sw_interface_set_mtu(
 561                     sw_if_index=sw_if_idx, mtu=[mtu, 0, 0, 0]
 562                 )
 563             for namespace, interface_name in linux_interfaces:
 564                 set_interface_mtu(
 565                     namespace=namespace,
 566                     interface=interface_name,
 567                     mtu=mtu,
 568                     logger=self.logger,
 569                 )
 570             return True
 571         else:
 572             return False
 573
 574
 575 generate_vpp_interface_tests()
 576
 577 if __name__ == "__main__":
 578     unittest.main(testRunner=VppTestRunner)