test/test_dvr.py

   1 #!/usr/bin/env python3
   2 import unittest
   3
   4 from framework import VppTestCase, VppTestRunner
   5 from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathType
   6 from vpp_l2 import L2_PORT_TYPE
   7 from vpp_sub_interface import L2_VTR_OP, VppDot1QSubint
   8
   9 from scapy.packet import Raw
  10 from scapy.layers.l2 import Ether, Dot1Q
  11 from scapy.layers.inet import IP, UDP
  12 from socket import AF_INET, inet_pton
  13
  14 NUM_PKTS = 67
  15
  16
  17 class TestDVR(VppTestCase):
  18     """ Distributed Virtual Router """
  19
  20     @classmethod
  21     def setUpClass(cls):
  22         super(TestDVR, cls).setUpClass()
  23
  24     @classmethod
  25     def tearDownClass(cls):
  26         super(TestDVR, cls).tearDownClass()
  27
  28     def setUp(self):
  29         super(TestDVR, self).setUp()
  30
  31         self.create_pg_interfaces(range(4))
  32         self.create_loopback_interfaces(1)
  33
  34         for i in self.pg_interfaces:
  35             i.admin_up()
  36
  37         self.loop0.config_ip4()
  38
  39     def tearDown(self):
  40         for i in self.pg_interfaces:
  41             i.admin_down()
  42         self.loop0.unconfig_ip4()
  43
  44         super(TestDVR, self).tearDown()
  45
  46     def assert_same_mac_addr(self, tx, rx):
  47         t_eth = tx[Ether]
  48         for p in rx:
  49             r_eth = p[Ether]
  50             self.assertEqual(t_eth.src, r_eth.src)
  51             self.assertEqual(t_eth.dst, r_eth.dst)
  52
  53     def assert_has_vlan_tag(self, tag, rx):
  54         for p in rx:
  55             r_1q = p[Dot1Q]
  56             self.assertEqual(tag, r_1q.vlan)
  57
  58     def assert_has_no_tag(self, rx):
  59         for p in rx:
  60             self.assertFalse(p.haslayer(Dot1Q))
  61
  62     def test_dvr(self):
  63         """ Distributed Virtual Router """
  64
  65         #
  66         # A packet destined to an IP address that is L2 bridged via
  67         # a non-tag interface
  68         #
  69         ip_non_tag_bridged = "10.10.10.10"
  70         ip_tag_bridged = "10.10.10.11"
  71         any_src_addr = "1.1.1.1"
  72
  73         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
  74                             dst=self.loop0.local_mac) /
  75                       IP(src=any_src_addr,
  76                          dst=ip_non_tag_bridged) /
  77                       UDP(sport=1234, dport=1234) /
  78                       Raw(b'\xa5' * 100))
  79         pkt_tag = (Ether(src=self.pg0.remote_mac,
  80                          dst=self.loop0.local_mac) /
  81                    IP(src=any_src_addr,
  82                       dst=ip_tag_bridged) /
  83                    UDP(sport=1234, dport=1234) /
  84                    Raw(b'\xa5' * 100))
  85
  86         #
  87         # Two sub-interfaces so we can test VLAN tag push/pop
  88         #
  89         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
  90         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
  91         sub_if_on_pg2.admin_up()
  92         sub_if_on_pg3.admin_up()
  93
  94         #
  95         # Put all the interfaces into a new bridge domain
  96         #
  97         self.vapi.sw_interface_set_l2_bridge(
  98             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
  99         self.vapi.sw_interface_set_l2_bridge(
 100             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
 101         self.vapi.sw_interface_set_l2_bridge(
 102             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
 103         self.vapi.sw_interface_set_l2_bridge(
 104             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
 105         self.vapi.sw_interface_set_l2_bridge(
 106             rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
 107             port_type=L2_PORT_TYPE.BVI)
 108
 109         self.vapi.l2_interface_vlan_tag_rewrite(
 110             sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 111             push_dot1q=92)
 112         self.vapi.l2_interface_vlan_tag_rewrite(
 113             sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 114             push_dot1q=93)
 115
 116         #
 117         # Add routes to bridge the traffic via a tagged an nontagged interface
 118         #
 119         route_no_tag = VppIpRoute(
 120             self, ip_non_tag_bridged, 32,
 121             [VppRoutePath("0.0.0.0",
 122                           self.pg1.sw_if_index,
 123                           type=FibPathType.FIB_PATH_TYPE_DVR)])
 124         route_no_tag.add_vpp_config()
 125
 126         #
 127         # Inject the packet that arrives and leaves on a non-tagged interface
 128         # Since it's 'bridged' expect that the MAC headed is unchanged.
 129         #
 130         rx = self.send_and_expect(self.pg0, pkt_no_tag * NUM_PKTS, self.pg1)
 131         self.assert_same_mac_addr(pkt_no_tag, rx)
 132         self.assert_has_no_tag(rx)
 133
 134         #
 135         # Add routes to bridge the traffic via a tagged interface
 136         #
 137         route_with_tag = VppIpRoute(
 138             self, ip_tag_bridged, 32,
 139             [VppRoutePath("0.0.0.0",
 140                           sub_if_on_pg3.sw_if_index,
 141                           type=FibPathType.FIB_PATH_TYPE_DVR)])
 142         route_with_tag.add_vpp_config()
 143
 144         #
 145         # Inject the packet that arrives non-tag and leaves on a tagged
 146         # interface
 147         #
 148         rx = self.send_and_expect(self.pg0, pkt_tag * NUM_PKTS, self.pg3)
 149         self.assert_same_mac_addr(pkt_tag, rx)
 150         self.assert_has_vlan_tag(93, rx)
 151
 152         #
 153         # Tag to tag
 154         #
 155         pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
 156                                 dst=self.loop0.local_mac) /
 157                           Dot1Q(vlan=92) /
 158                           IP(src=any_src_addr,
 159                              dst=ip_tag_bridged) /
 160                           UDP(sport=1234, dport=1234) /
 161                           Raw(b'\xa5' * 100))
 162
 163         rx = self.send_and_expect(self.pg2,
 164                                   pkt_tag_to_tag * NUM_PKTS,
 165                                   self.pg3)
 166         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 167         self.assert_has_vlan_tag(93, rx)
 168
 169         #
 170         # Tag to non-Tag
 171         #
 172         pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
 173                                     dst=self.loop0.local_mac) /
 174                               Dot1Q(vlan=92) /
 175                               IP(src=any_src_addr,
 176                                  dst=ip_non_tag_bridged) /
 177                               UDP(sport=1234, dport=1234) /
 178                               Raw(b'\xa5' * 100))
 179
 180         rx = self.send_and_expect(self.pg2,
 181                                   pkt_tag_to_non_tag * NUM_PKTS,
 182                                   self.pg1)
 183         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 184         self.assert_has_no_tag(rx)
 185
 186         #
 187         # Add an output L3 ACL that will block the traffic
 188         #
 189         rule_1 = ({'is_permit': 0,
 190                    'is_ipv6': 0,
 191                    'proto': 17,
 192                    'srcport_or_icmptype_first': 1234,
 193                    'srcport_or_icmptype_last': 1234,
 194                    'src_ip_prefix_len': 32,
 195                    'src_ip_addr': inet_pton(AF_INET, any_src_addr),
 196                    'dstport_or_icmpcode_first': 1234,
 197                    'dstport_or_icmpcode_last': 1234,
 198                    'dst_ip_prefix_len': 32,
 199                    'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)})
 200         acl = self.vapi.acl_add_replace(acl_index=4294967295,
 201                                         r=[rule_1])
 202
 203         #
 204         # Apply the ACL on the output interface
 205         #
 206         self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
 207                                              0,
 208                                              [acl.acl_index])
 209
 210         #
 211         # Send packet's that should match the ACL and be dropped
 212         #
 213         rx = self.send_and_assert_no_replies(self.pg2,
 214                                              pkt_tag_to_non_tag * NUM_PKTS)
 215
 216         #
 217         # cleanup
 218         #
 219         self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
 220                                              0, [])
 221         self.vapi.acl_del(acl.acl_index)
 222
 223         self.vapi.sw_interface_set_l2_bridge(
 224             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
 225         self.vapi.sw_interface_set_l2_bridge(
 226             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
 227         self.vapi.sw_interface_set_l2_bridge(
 228             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
 229         self.vapi.sw_interface_set_l2_bridge(
 230             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
 231         self.vapi.sw_interface_set_l2_bridge(
 232             rx_sw_if_index=self.loop0.sw_if_index, bd_id=1,
 233             port_type=L2_PORT_TYPE.BVI, enable=0)
 234
 235         #
 236         # Do a FIB dump to make sure the paths are correctly reported as DVR
 237         #
 238         routes = self.vapi.ip_route_dump(0)
 239
 240         for r in routes:
 241             if (ip_tag_bridged == str(r.route.prefix.network_address)):
 242                 self.assertEqual(r.route.paths[0].sw_if_index,
 243                                  sub_if_on_pg3.sw_if_index)
 244                 self.assertEqual(r.route.paths[0].type,
 245                                  FibPathType.FIB_PATH_TYPE_DVR)
 246             if (ip_non_tag_bridged == str(r.route.prefix.network_address)):
 247                 self.assertEqual(r.route.paths[0].sw_if_index,
 248                                  self.pg1.sw_if_index)
 249                 self.assertEqual(r.route.paths[0].type,
 250                                  FibPathType.FIB_PATH_TYPE_DVR)
 251
 252         #
 253         # the explicit route delete is require so it happens before
 254         # the sbu-interface delete. subinterface delete is required
 255         # because that object type does not use the object registry
 256         #
 257         route_no_tag.remove_vpp_config()
 258         route_with_tag.remove_vpp_config()
 259         sub_if_on_pg3.remove_vpp_config()
 260         sub_if_on_pg2.remove_vpp_config()
 261
 262     def test_l2_emulation(self):
 263         """ L2 Emulation """
 264
 265         #
 266         # non distinct L3 packets, in the tag/non-tag combos
 267         #
 268         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
 269                             dst=self.pg1.remote_mac) /
 270                       IP(src="2.2.2.2",
 271                          dst="1.1.1.1") /
 272                       UDP(sport=1234, dport=1234) /
 273                       Raw(b'\xa5' * 100))
 274         pkt_to_tag = (Ether(src=self.pg0.remote_mac,
 275                             dst=self.pg2.remote_mac) /
 276                       IP(src="2.2.2.2",
 277                          dst="1.1.1.2") /
 278                       UDP(sport=1234, dport=1234) /
 279                       Raw(b'\xa5' * 100))
 280         pkt_from_tag = (Ether(src=self.pg3.remote_mac,
 281                               dst=self.pg2.remote_mac) /
 282                         Dot1Q(vlan=93) /
 283                         IP(src="2.2.2.2",
 284                            dst="1.1.1.1") /
 285                         UDP(sport=1234, dport=1234) /
 286                         Raw(b'\xa5' * 100))
 287         pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
 288                                  dst=self.pg2.remote_mac) /
 289                            Dot1Q(vlan=93) /
 290                            IP(src="2.2.2.2",
 291                               dst="1.1.1.2") /
 292                            UDP(sport=1234, dport=1234) /
 293                            Raw(b'\xa5' * 100))
 294         pkt_bcast = (Ether(src=self.pg0.remote_mac,
 295                            dst="ff:ff:ff:ff:ff:ff") /
 296                      IP(src="2.2.2.2",
 297                         dst="255.255.255.255") /
 298                      UDP(sport=1234, dport=1234) /
 299                      Raw(b'\xa5' * 100))
 300
 301         #
 302         # A couple of sub-interfaces for tags
 303         #
 304         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
 305         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
 306         sub_if_on_pg2.admin_up()
 307         sub_if_on_pg3.admin_up()
 308
 309         #
 310         # Put all the interfaces into a new bridge domain
 311         #
 312         self.vapi.sw_interface_set_l2_bridge(
 313             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
 314         self.vapi.sw_interface_set_l2_bridge(
 315             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
 316         self.vapi.sw_interface_set_l2_bridge(
 317             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
 318         self.vapi.sw_interface_set_l2_bridge(
 319             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
 320         self.vapi.l2_interface_vlan_tag_rewrite(
 321             sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 322             push_dot1q=92)
 323         self.vapi.l2_interface_vlan_tag_rewrite(
 324             sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 325             push_dot1q=93)
 326
 327         #
 328         # Disable UU flooding, learning and ARP termination. makes this test
 329         # easier as unicast packets are dropped if not extracted.
 330         #
 331         self.vapi.bridge_flags(bd_id=1, is_set=0,
 332                                flags=(1 << 0) | (1 << 3) | (1 << 4))
 333
 334         #
 335         # Add a DVR route to steer traffic at L3
 336         #
 337         route_1 = VppIpRoute(
 338             self, "1.1.1.1", 32,
 339             [VppRoutePath("0.0.0.0",
 340                           self.pg1.sw_if_index,
 341                           type=FibPathType.FIB_PATH_TYPE_DVR)])
 342         route_2 = VppIpRoute(
 343             self, "1.1.1.2", 32,
 344             [VppRoutePath("0.0.0.0",
 345                           sub_if_on_pg2.sw_if_index,
 346                           type=FibPathType.FIB_PATH_TYPE_DVR)])
 347         route_1.add_vpp_config()
 348         route_2.add_vpp_config()
 349
 350         #
 351         # packets are dropped because bridge does not flood unknown unicast
 352         #
 353         self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
 354
 355         #
 356         # Enable L3 extraction on pgs
 357         #
 358         self.vapi.l2_emulation(self.pg0.sw_if_index)
 359         self.vapi.l2_emulation(self.pg1.sw_if_index)
 360         self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index)
 361         self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index)
 362
 363         #
 364         # now we expect the packet forward according to the DVR route
 365         #
 366         rx = self.send_and_expect(self.pg0, pkt_no_tag * NUM_PKTS, self.pg1)
 367         self.assert_same_mac_addr(pkt_no_tag, rx)
 368         self.assert_has_no_tag(rx)
 369
 370         rx = self.send_and_expect(self.pg0, pkt_to_tag * NUM_PKTS, self.pg2)
 371         self.assert_same_mac_addr(pkt_to_tag, rx)
 372         self.assert_has_vlan_tag(92, rx)
 373
 374         rx = self.send_and_expect(self.pg3, pkt_from_tag * NUM_PKTS, self.pg1)
 375         self.assert_same_mac_addr(pkt_from_tag, rx)
 376         self.assert_has_no_tag(rx)
 377
 378         rx = self.send_and_expect(self.pg3,
 379                                   pkt_from_to_tag * NUM_PKTS,
 380                                   self.pg2)
 381         self.assert_same_mac_addr(pkt_from_tag, rx)
 382         self.assert_has_vlan_tag(92, rx)
 383
 384         #
 385         # but broadcast packets are still flooded
 386         #
 387         self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
 388
 389         #
 390         # cleanup
 391         #
 392         self.vapi.l2_emulation(self.pg0.sw_if_index,
 393                                enable=0)
 394         self.vapi.l2_emulation(self.pg1.sw_if_index,
 395                                enable=0)
 396         self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index,
 397                                enable=0)
 398         self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index,
 399                                enable=0)
 400
 401         self.vapi.sw_interface_set_l2_bridge(
 402             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
 403         self.vapi.sw_interface_set_l2_bridge(
 404             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
 405         self.vapi.sw_interface_set_l2_bridge(
 406             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
 407         self.vapi.sw_interface_set_l2_bridge(
 408             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
 409
 410         route_1.remove_vpp_config()
 411         route_2.remove_vpp_config()
 412         sub_if_on_pg3.remove_vpp_config()
 413         sub_if_on_pg2.remove_vpp_config()
 414
 415
 416 if __name__ == '__main__':
 417     unittest.main(testRunner=VppTestRunner)