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