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.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index,
  95                                                   L2_VTR_OP.L2_POP_1,
  96                                                   92)
  97         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg3.sw_if_index,
  98                                                   L2_VTR_OP.L2_POP_1,
  99                                                   93)
 100
 101         #
 102         # Add routes to bridge the traffic via a tagged an nontagged interface
 103         #
 104         route_no_tag = VppIpRoute(
 105             self, ip_non_tag_bridged, 32,
 106             [VppRoutePath("0.0.0.0",
 107                           self.pg1.sw_if_index,
 108                           is_dvr=1)])
 109         route_no_tag.add_vpp_config()
 110
 111         #
 112         # Inject the packet that arrives and leaves on a non-tagged interface
 113         # Since it's 'bridged' expect that the MAC headed is unchanged.
 114         #
 115         rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
 116         self.assert_same_mac_addr(pkt_no_tag, rx)
 117         self.assert_has_no_tag(rx)
 118
 119         #
 120         # Add routes to bridge the traffic via a tagged interface
 121         #
 122         route_with_tag = VppIpRoute(
 123             self, ip_tag_bridged, 32,
 124             [VppRoutePath("0.0.0.0",
 125                           sub_if_on_pg3.sw_if_index,
 126                           is_dvr=1)])
 127         route_with_tag.add_vpp_config()
 128
 129         #
 130         # Inject the packet that arrives non-tag and leaves on a tagged
 131         # interface
 132         #
 133         rx = self.send_and_expect(self.pg0, pkt_tag * 65, self.pg3)
 134         self.assert_same_mac_addr(pkt_tag, rx)
 135         self.assert_has_vlan_tag(93, rx)
 136
 137         #
 138         # Tag to tag
 139         #
 140         pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
 141                                 dst=self.loop0.local_mac) /
 142                           Dot1Q(vlan=92) /
 143                           IP(src=any_src_addr,
 144                              dst=ip_tag_bridged) /
 145                           UDP(sport=1234, dport=1234) /
 146                           Raw('\xa5' * 100))
 147
 148         rx = self.send_and_expect(self.pg2, pkt_tag_to_tag * 65, self.pg3)
 149         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 150         self.assert_has_vlan_tag(93, rx)
 151
 152         #
 153         # Tag to non-Tag
 154         #
 155         pkt_tag_to_non_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_non_tag_bridged) /
 160                               UDP(sport=1234, dport=1234) /
 161                               Raw('\xa5' * 100))
 162
 163         rx = self.send_and_expect(self.pg2, pkt_tag_to_non_tag * 65, self.pg1)
 164         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 165         self.assert_has_no_tag(rx)
 166
 167         #
 168         # Add an output L3 ACL that will block the traffic
 169         #
 170         rule_1 = ({'is_permit': 0,
 171                    'is_ipv6': 0,
 172                    'proto': 17,
 173                    'srcport_or_icmptype_first': 1234,
 174                    'srcport_or_icmptype_last': 1234,
 175                    'src_ip_prefix_len': 32,
 176                    'src_ip_addr': inet_pton(AF_INET, any_src_addr),
 177                    'dstport_or_icmpcode_first': 1234,
 178                    'dstport_or_icmpcode_last': 1234,
 179                    'dst_ip_prefix_len': 32,
 180                    'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)})
 181         acl = self.vapi.acl_add_replace(acl_index=4294967295,
 182                                         r=[rule_1])
 183
 184         #
 185         # Apply the ACL on the output interface
 186         #
 187         self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
 188                                              0,
 189                                              [acl.acl_index])
 190
 191         #
 192         # Send packet's that should match the ACL and be dropped
 193         #
 194         rx = self.send_and_assert_no_replies(self.pg2, pkt_tag_to_non_tag * 65)
 195
 196         #
 197         # cleanup
 198         #
 199         self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
 200                                              0, [])
 201         self.vapi.acl_del(acl.acl_index)
 202
 203         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1,
 204                                              enable=0)
 205         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1,
 206                                              enable=0)
 207         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
 208                                              1, enable=0)
 209         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
 210                                              1, enable=0)
 211         self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index,
 212                                              1, port_type=L2_PORT_TYPE.BVI,
 213                                              enable=0)
 214
 215         #
 216         # Do a FIB dump to make sure the paths are correctly reported as DVR
 217         #
 218         routes = self.vapi.ip_fib_dump()
 219
 220         for r in routes:
 221             if (inet_pton(AF_INET, ip_tag_bridged) == r.address):
 222                 self.assertEqual(r.path[0].sw_if_index,
 223                                  sub_if_on_pg3.sw_if_index)
 224                 self.assertEqual(r.path[0].is_dvr, 1)
 225             if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
 226                 self.assertEqual(r.path[0].sw_if_index,
 227                                  self.pg1.sw_if_index)
 228                 self.assertEqual(r.path[0].is_dvr, 1)
 229
 230         #
 231         # the explicit route delete is require so it happens before
 232         # the sbu-interface delete. subinterface delete is required
 233         # because that object type does not use the object registry
 234         #
 235         route_no_tag.remove_vpp_config()
 236         route_with_tag.remove_vpp_config()
 237         sub_if_on_pg3.remove_vpp_config()
 238         sub_if_on_pg2.remove_vpp_config()
 239
 240     def test_l2_emulation(self):
 241         """ L2 Emulation """
 242
 243         #
 244         # non distinct L3 packets, in the tag/non-tag combos
 245         #
 246         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
 247                             dst=self.pg1.remote_mac) /
 248                       IP(src="2.2.2.2",
 249                          dst="1.1.1.1") /
 250                       UDP(sport=1234, dport=1234) /
 251                       Raw('\xa5' * 100))
 252         pkt_to_tag = (Ether(src=self.pg0.remote_mac,
 253                             dst=self.pg2.remote_mac) /
 254                       IP(src="2.2.2.2",
 255                          dst="1.1.1.2") /
 256                       UDP(sport=1234, dport=1234) /
 257                       Raw('\xa5' * 100))
 258         pkt_from_tag = (Ether(src=self.pg3.remote_mac,
 259                               dst=self.pg2.remote_mac) /
 260                         Dot1Q(vlan=93) /
 261                         IP(src="2.2.2.2",
 262                            dst="1.1.1.1") /
 263                         UDP(sport=1234, dport=1234) /
 264                         Raw('\xa5' * 100))
 265         pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
 266                                  dst=self.pg2.remote_mac) /
 267                            Dot1Q(vlan=93) /
 268                            IP(src="2.2.2.2",
 269                               dst="1.1.1.2") /
 270                            UDP(sport=1234, dport=1234) /
 271                            Raw('\xa5' * 100))
 272         pkt_bcast = (Ether(src=self.pg0.remote_mac,
 273                            dst="ff:ff:ff:ff:ff:ff") /
 274                      IP(src="2.2.2.2",
 275                         dst="255.255.255.255") /
 276                      UDP(sport=1234, dport=1234) /
 277                      Raw('\xa5' * 100))
 278
 279         #
 280         # A couple of sub-interfaces for tags
 281         #
 282         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
 283         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
 284         sub_if_on_pg2.admin_up()
 285         sub_if_on_pg3.admin_up()
 286
 287         #
 288         # Put all the interfaces into a new bridge domain
 289         #
 290         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1)
 291         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1)
 292         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1)
 293         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1)
 294         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index,
 295                                                   L2_VTR_OP.L2_POP_1,
 296                                                   92)
 297         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg3.sw_if_index,
 298                                                   L2_VTR_OP.L2_POP_1,
 299                                                   93)
 300
 301         #
 302         # Disable UU flooding, learning and ARP terminaation. makes this test
 303         # easier as unicast packets are dropped if not extracted.
 304         #
 305         self.vapi.bridge_flags(1, 0, (1 << 0) | (1 << 3) | (1 << 4))
 306
 307         #
 308         # Add a DVR route to steer traffic at L3
 309         #
 310         route_1 = VppIpRoute(self, "1.1.1.1", 32,
 311                              [VppRoutePath("0.0.0.0",
 312                                            self.pg1.sw_if_index,
 313                                            is_dvr=1)])
 314         route_2 = VppIpRoute(self, "1.1.1.2", 32,
 315                              [VppRoutePath("0.0.0.0",
 316                                            sub_if_on_pg2.sw_if_index,
 317                                            is_dvr=1)])
 318         route_1.add_vpp_config()
 319         route_2.add_vpp_config()
 320
 321         #
 322         # packets are dropped because bridge does not flood unknown unicast
 323         #
 324         self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
 325
 326         #
 327         # Enable L3 extraction on pgs
 328         #
 329         self.vapi.sw_interface_set_l2_emulation(self.pg0.sw_if_index)
 330         self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index)
 331         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index)
 332         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg3.sw_if_index)
 333
 334         #
 335         # now we expect the packet forward according to the DVR route
 336         #
 337         rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
 338         self.assert_same_mac_addr(pkt_no_tag, rx)
 339         self.assert_has_no_tag(rx)
 340
 341         rx = self.send_and_expect(self.pg0, pkt_to_tag * 65, self.pg2)
 342         self.assert_same_mac_addr(pkt_to_tag, rx)
 343         self.assert_has_vlan_tag(92, rx)
 344
 345         rx = self.send_and_expect(self.pg3, pkt_from_tag * 65, self.pg1)
 346         self.assert_same_mac_addr(pkt_from_tag, rx)
 347         self.assert_has_no_tag(rx)
 348
 349         rx = self.send_and_expect(self.pg3, pkt_from_to_tag * 65, self.pg2)
 350         self.assert_same_mac_addr(pkt_from_tag, rx)
 351         self.assert_has_vlan_tag(92, rx)
 352
 353         #
 354         # but broadcast packets are still flooded
 355         #
 356         self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
 357
 358         #
 359         # cleanup
 360         #
 361         self.vapi.sw_interface_set_l2_emulation(self.pg0.sw_if_index,
 362                                                 enable=0)
 363         self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index,
 364                                                 enable=0)
 365         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index,
 366                                                 enable=0)
 367         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg3.sw_if_index,
 368                                                 enable=0)
 369
 370         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index,
 371                                              1, enable=0)
 372         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index,
 373                                              1, enable=0)
 374         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
 375                                              1, enable=0)
 376         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
 377                                              1, enable=0)
 378
 379         route_1.remove_vpp_config()
 380         route_2.remove_vpp_config()
 381         sub_if_on_pg3.remove_vpp_config()
 382         sub_if_on_pg2.remove_vpp_config()
 383
 384
 385 if __name__ == '__main__':
 386     unittest.main(testRunner=VppTestRunner)