test/test_dvr.py

   1 #!/usr/bin/env python
   2 import unittest
   3
   4 from framework import VppTestCase, VppTestRunner
   5 from vpp_ip_route import VppIpRoute, VppRoutePath
   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('\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('\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                           is_dvr=1)])
 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                           is_dvr=1)])
 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('\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('\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_fib_dump()
 239
 240         for r in routes:
 241             if (inet_pton(AF_INET, ip_tag_bridged) == r.address):
 242                 self.assertEqual(r.path[0].sw_if_index,
 243                                  sub_if_on_pg3.sw_if_index)
 244                 self.assertEqual(r.path[0].is_dvr, 1)
 245             if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
 246                 self.assertEqual(r.path[0].sw_if_index,
 247                                  self.pg1.sw_if_index)
 248                 self.assertEqual(r.path[0].is_dvr, 1)
 249
 250         #
 251         # the explicit route delete is require so it happens before
 252         # the sbu-interface delete. subinterface delete is required
 253         # because that object type does not use the object registry
 254         #
 255         route_no_tag.remove_vpp_config()
 256         route_with_tag.remove_vpp_config()
 257         sub_if_on_pg3.remove_vpp_config()
 258         sub_if_on_pg2.remove_vpp_config()
 259
 260     def test_l2_emulation(self):
 261         """ L2 Emulation """
 262
 263         #
 264         # non distinct L3 packets, in the tag/non-tag combos
 265         #
 266         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
 267                             dst=self.pg1.remote_mac) /
 268                       IP(src="2.2.2.2",
 269                          dst="1.1.1.1") /
 270                       UDP(sport=1234, dport=1234) /
 271                       Raw('\xa5' * 100))
 272         pkt_to_tag = (Ether(src=self.pg0.remote_mac,
 273                             dst=self.pg2.remote_mac) /
 274                       IP(src="2.2.2.2",
 275                          dst="1.1.1.2") /
 276                       UDP(sport=1234, dport=1234) /
 277                       Raw('\xa5' * 100))
 278         pkt_from_tag = (Ether(src=self.pg3.remote_mac,
 279                               dst=self.pg2.remote_mac) /
 280                         Dot1Q(vlan=93) /
 281                         IP(src="2.2.2.2",
 282                            dst="1.1.1.1") /
 283                         UDP(sport=1234, dport=1234) /
 284                         Raw('\xa5' * 100))
 285         pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
 286                                  dst=self.pg2.remote_mac) /
 287                            Dot1Q(vlan=93) /
 288                            IP(src="2.2.2.2",
 289                               dst="1.1.1.2") /
 290                            UDP(sport=1234, dport=1234) /
 291                            Raw('\xa5' * 100))
 292         pkt_bcast = (Ether(src=self.pg0.remote_mac,
 293                            dst="ff:ff:ff:ff:ff:ff") /
 294                      IP(src="2.2.2.2",
 295                         dst="255.255.255.255") /
 296                      UDP(sport=1234, dport=1234) /
 297                      Raw('\xa5' * 100))
 298
 299         #
 300         # A couple of sub-interfaces for tags
 301         #
 302         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
 303         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
 304         sub_if_on_pg2.admin_up()
 305         sub_if_on_pg3.admin_up()
 306
 307         #
 308         # Put all the interfaces into a new bridge domain
 309         #
 310         self.vapi.sw_interface_set_l2_bridge(
 311             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1)
 312         self.vapi.sw_interface_set_l2_bridge(
 313             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1)
 314         self.vapi.sw_interface_set_l2_bridge(
 315             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1)
 316         self.vapi.sw_interface_set_l2_bridge(
 317             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1)
 318         self.vapi.l2_interface_vlan_tag_rewrite(
 319             sw_if_index=sub_if_on_pg2.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 320             push_dot1q=92)
 321         self.vapi.l2_interface_vlan_tag_rewrite(
 322             sw_if_index=sub_if_on_pg3.sw_if_index, vtr_op=L2_VTR_OP.L2_POP_1,
 323             push_dot1q=93)
 324
 325         #
 326         # Disable UU flooding, learning and ARP termination. makes this test
 327         # easier as unicast packets are dropped if not extracted.
 328         #
 329         self.vapi.bridge_flags(bd_id=1, is_set=0,
 330                                flags=(1 << 0) | (1 << 3) | (1 << 4))
 331
 332         #
 333         # Add a DVR route to steer traffic at L3
 334         #
 335         route_1 = VppIpRoute(self, "1.1.1.1", 32,
 336                              [VppRoutePath("0.0.0.0",
 337                                            self.pg1.sw_if_index,
 338                                            is_dvr=1)])
 339         route_2 = VppIpRoute(self, "1.1.1.2", 32,
 340                              [VppRoutePath("0.0.0.0",
 341                                            sub_if_on_pg2.sw_if_index,
 342                                            is_dvr=1)])
 343         route_1.add_vpp_config()
 344         route_2.add_vpp_config()
 345
 346         #
 347         # packets are dropped because bridge does not flood unknown unicast
 348         #
 349         self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
 350
 351         #
 352         # Enable L3 extraction on pgs
 353         #
 354         self.vapi.l2_emulation(self.pg0.sw_if_index)
 355         self.vapi.l2_emulation(self.pg1.sw_if_index)
 356         self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index)
 357         self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index)
 358
 359         #
 360         # now we expect the packet forward according to the DVR route
 361         #
 362         rx = self.send_and_expect(self.pg0, pkt_no_tag * NUM_PKTS, self.pg1)
 363         self.assert_same_mac_addr(pkt_no_tag, rx)
 364         self.assert_has_no_tag(rx)
 365
 366         rx = self.send_and_expect(self.pg0, pkt_to_tag * NUM_PKTS, self.pg2)
 367         self.assert_same_mac_addr(pkt_to_tag, rx)
 368         self.assert_has_vlan_tag(92, rx)
 369
 370         rx = self.send_and_expect(self.pg3, pkt_from_tag * NUM_PKTS, self.pg1)
 371         self.assert_same_mac_addr(pkt_from_tag, rx)
 372         self.assert_has_no_tag(rx)
 373
 374         rx = self.send_and_expect(self.pg3,
 375                                   pkt_from_to_tag * NUM_PKTS,
 376                                   self.pg2)
 377         self.assert_same_mac_addr(pkt_from_tag, rx)
 378         self.assert_has_vlan_tag(92, rx)
 379
 380         #
 381         # but broadcast packets are still flooded
 382         #
 383         self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
 384
 385         #
 386         # cleanup
 387         #
 388         self.vapi.l2_emulation(self.pg0.sw_if_index,
 389                                enable=0)
 390         self.vapi.l2_emulation(self.pg1.sw_if_index,
 391                                enable=0)
 392         self.vapi.l2_emulation(sub_if_on_pg2.sw_if_index,
 393                                enable=0)
 394         self.vapi.l2_emulation(sub_if_on_pg3.sw_if_index,
 395                                enable=0)
 396
 397         self.vapi.sw_interface_set_l2_bridge(
 398             rx_sw_if_index=self.pg0.sw_if_index, bd_id=1, enable=0)
 399         self.vapi.sw_interface_set_l2_bridge(
 400             rx_sw_if_index=self.pg1.sw_if_index, bd_id=1, enable=0)
 401         self.vapi.sw_interface_set_l2_bridge(
 402             rx_sw_if_index=sub_if_on_pg2.sw_if_index, bd_id=1, enable=0)
 403         self.vapi.sw_interface_set_l2_bridge(
 404             rx_sw_if_index=sub_if_on_pg3.sw_if_index, bd_id=1, enable=0)
 405
 406         route_1.remove_vpp_config()
 407         route_2.remove_vpp_config()
 408         sub_if_on_pg3.remove_vpp_config()
 409         sub_if_on_pg2.remove_vpp_config()
 410
 411
 412 if __name__ == '__main__':
 413     unittest.main(testRunner=VppTestRunner)