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