test/test_dvr.py

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