test/test_dvr.py

   1 #!/usr/bin/env python
   2 import random
   3 import socket
   4 import unittest
   5
   6 from framework import VppTestCase, VppTestRunner
   7 from vpp_sub_interface import VppSubInterface, VppDot1QSubint
   8 from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto, VppIpMRoute, \
   9     VppMRoutePath, MRouteEntryFlags, MRouteItfFlags
  10 from vpp_papi_provider import L2_VTR_OP
  11
  12 from scapy.packet import Raw
  13 from scapy.layers.l2 import Ether, Dot1Q, ARP
  14 from scapy.layers.inet import IP, UDP
  15 from util import ppp
  16 from socket import AF_INET, inet_pton
  17
  18
  19 class TestDVR(VppTestCase):
  20     """ Distributed Virtual Router """
  21
  22     def setUp(self):
  23         super(TestDVR, self).setUp()
  24
  25         self.create_pg_interfaces(range(4))
  26         self.create_loopback_interfaces(range(1))
  27
  28         for i in self.pg_interfaces:
  29             i.admin_up()
  30
  31         self.loop0.config_ip4()
  32
  33     def tearDown(self):
  34         for i in self.pg_interfaces:
  35             i.admin_down()
  36         self.loop0.unconfig_ip4()
  37
  38         super(TestDVR, self).tearDown()
  39
  40     def assert_same_mac_addr(self, tx, rx):
  41         t_eth = tx[Ether]
  42         for p in rx:
  43             r_eth = p[Ether]
  44             self.assertEqual(t_eth.src, r_eth.src)
  45             self.assertEqual(t_eth.dst, r_eth.dst)
  46
  47     def assert_has_vlan_tag(self, tag, rx):
  48         for p in rx:
  49             r_1q = p[Dot1Q]
  50             self.assertEqual(tag, r_1q.vlan)
  51
  52     def assert_has_no_tag(self, rx):
  53         for p in rx:
  54             self.assertFalse(p.haslayer(Dot1Q))
  55
  56     def test_dvr(self):
  57         """ Distributed Virtual Router """
  58
  59         #
  60         # A packet destined to an IP address that is L2 bridged via
  61         # a non-tag interface
  62         #
  63         ip_non_tag_bridged = "10.10.10.10"
  64         ip_tag_bridged = "10.10.10.11"
  65         any_src_addr = "1.1.1.1"
  66
  67         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
  68                             dst=self.loop0.local_mac) /
  69                       IP(src=any_src_addr,
  70                          dst=ip_non_tag_bridged) /
  71                       UDP(sport=1234, dport=1234) /
  72                       Raw('\xa5' * 100))
  73         pkt_tag = (Ether(src=self.pg0.remote_mac,
  74                          dst=self.loop0.local_mac) /
  75                    IP(src=any_src_addr,
  76                       dst=ip_tag_bridged) /
  77                    UDP(sport=1234, dport=1234) /
  78                    Raw('\xa5' * 100))
  79
  80         #
  81         # Two sub-interfaces so we can test VLAN tag push/pop
  82         #
  83         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
  84         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
  85         sub_if_on_pg2.admin_up()
  86         sub_if_on_pg3.admin_up()
  87
  88         #
  89         # Put all the interfaces into a new bridge domain
  90         #
  91         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1)
  92         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1)
  93         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1)
  94         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1)
  95         self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index, 1, bvi=1)
  96
  97         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index,
  98                                                   L2_VTR_OP.L2_POP_1,
  99                                                   92)
 100         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg3.sw_if_index,
 101                                                   L2_VTR_OP.L2_POP_1,
 102                                                   93)
 103
 104         #
 105         # Add routes to bridge the traffic via a tagged an nontagged interface
 106         #
 107         route_no_tag = VppIpRoute(
 108             self, ip_non_tag_bridged, 32,
 109             [VppRoutePath("0.0.0.0",
 110                           self.pg1.sw_if_index,
 111                           is_dvr=1)])
 112         route_no_tag.add_vpp_config()
 113
 114         #
 115         # Inject the packet that arrives and leaves on a non-tagged interface
 116         # Since it's 'bridged' expect that the MAC headed is unchanged.
 117         #
 118         rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
 119         self.assert_same_mac_addr(pkt_no_tag, rx)
 120         self.assert_has_no_tag(rx)
 121
 122         #
 123         # Add routes to bridge the traffic via a tagged interface
 124         #
 125         route_with_tag = VppIpRoute(
 126             self, ip_tag_bridged, 32,
 127             [VppRoutePath("0.0.0.0",
 128                           sub_if_on_pg3.sw_if_index,
 129                           is_dvr=1)])
 130         route_with_tag.add_vpp_config()
 131
 132         #
 133         # Inject the packet that arrives non-tag and leaves on a tagged
 134         # interface
 135         #
 136         rx = self.send_and_expect(self.pg0, pkt_tag * 65, self.pg3)
 137         self.assert_same_mac_addr(pkt_tag, rx)
 138         self.assert_has_vlan_tag(93, rx)
 139
 140         #
 141         # Tag to tag
 142         #
 143         pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
 144                                 dst=self.loop0.local_mac) /
 145                           Dot1Q(vlan=92) /
 146                           IP(src=any_src_addr,
 147                              dst=ip_tag_bridged) /
 148                           UDP(sport=1234, dport=1234) /
 149                           Raw('\xa5' * 100))
 150
 151         rx = self.send_and_expect(self.pg2, pkt_tag_to_tag * 65, self.pg3)
 152         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 153         self.assert_has_vlan_tag(93, rx)
 154
 155         #
 156         # Tag to non-Tag
 157         #
 158         pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
 159                                     dst=self.loop0.local_mac) /
 160                               Dot1Q(vlan=92) /
 161                               IP(src=any_src_addr,
 162                                  dst=ip_non_tag_bridged) /
 163                               UDP(sport=1234, dport=1234) /
 164                               Raw('\xa5' * 100))
 165
 166         rx = self.send_and_expect(self.pg2, pkt_tag_to_non_tag * 65, self.pg1)
 167         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 168         self.assert_has_no_tag(rx)
 169
 170         #
 171         # Add an output L3 ACL that will block the traffic
 172         #
 173         rule_1 = ({'is_permit': 0,
 174                    'is_ipv6': 0,
 175                    'proto': 17,
 176                    'srcport_or_icmptype_first': 1234,
 177                    'srcport_or_icmptype_last': 1234,
 178                    'src_ip_prefix_len': 32,
 179                    'src_ip_addr': inet_pton(AF_INET, any_src_addr),
 180                    'dstport_or_icmpcode_first': 1234,
 181                    'dstport_or_icmpcode_last': 1234,
 182                    'dst_ip_prefix_len': 32,
 183                    'dst_ip_addr': inet_pton(AF_INET, ip_non_tag_bridged)})
 184         acl = self.vapi.acl_add_replace(acl_index=4294967295,
 185                                         r=[rule_1])
 186
 187         #
 188         # Apply the ACL on the output interface
 189         #
 190         self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
 191                                              0,
 192                                              [acl.acl_index])
 193
 194         #
 195         # Send packet's that should match the ACL and be dropped
 196         #
 197         rx = self.send_and_assert_no_replies(self.pg2, pkt_tag_to_non_tag * 65)
 198
 199         #
 200         # cleanup
 201         #
 202         self.vapi.acl_interface_set_acl_list(self.pg1.sw_if_index,
 203                                              0, [])
 204         self.vapi.acl_del(acl.acl_index)
 205
 206         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1,
 207                                              enable=0)
 208         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1,
 209                                              enable=0)
 210         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
 211                                              1, enable=0)
 212         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
 213                                              1, enable=0)
 214         self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index,
 215                                              1, bvi=1, 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                 print r
 225                 self.assertEqual(r.path[0].sw_if_index,
 226                                  sub_if_on_pg3.sw_if_index)
 227                 self.assertEqual(r.path[0].is_dvr, 1)
 228             if (inet_pton(AF_INET, ip_non_tag_bridged) == r.address):
 229                 print r
 230                 self.assertEqual(r.path[0].sw_if_index,
 231                                  self.pg1.sw_if_index)
 232                 self.assertEqual(r.path[0].is_dvr, 1)
 233
 234         #
 235         # the explicit route delete is require so it happens before
 236         # the sbu-interface delete. subinterface delete is required
 237         # because that object type does not use the object registry
 238         #
 239         route_no_tag.remove_vpp_config()
 240         route_with_tag.remove_vpp_config()
 241         sub_if_on_pg3.remove_vpp_config()
 242         sub_if_on_pg2.remove_vpp_config()
 243
 244     def test_l2_emulation(self):
 245         """ L2 Emulation """
 246
 247         #
 248         # non distinct L3 packets, in the tag/non-tag combos
 249         #
 250         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
 251                             dst=self.pg1.remote_mac) /
 252                       IP(src="2.2.2.2",
 253                          dst="1.1.1.1") /
 254                       UDP(sport=1234, dport=1234) /
 255                       Raw('\xa5' * 100))
 256         pkt_to_tag = (Ether(src=self.pg0.remote_mac,
 257                             dst=self.pg2.remote_mac) /
 258                       IP(src="2.2.2.2",
 259                          dst="1.1.1.2") /
 260                       UDP(sport=1234, dport=1234) /
 261                       Raw('\xa5' * 100))
 262         pkt_from_tag = (Ether(src=self.pg3.remote_mac,
 263                               dst=self.pg2.remote_mac) /
 264                         Dot1Q(vlan=93) /
 265                         IP(src="2.2.2.2",
 266                            dst="1.1.1.1") /
 267                         UDP(sport=1234, dport=1234) /
 268                         Raw('\xa5' * 100))
 269         pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
 270                                  dst=self.pg2.remote_mac) /
 271                            Dot1Q(vlan=93) /
 272                            IP(src="2.2.2.2",
 273                               dst="1.1.1.2") /
 274                            UDP(sport=1234, dport=1234) /
 275                            Raw('\xa5' * 100))
 276         pkt_bcast = (Ether(src=self.pg0.remote_mac,
 277                            dst="ff:ff:ff:ff:ff:ff") /
 278                      IP(src="2.2.2.2",
 279                         dst="255.255.255.255") /
 280                      UDP(sport=1234, dport=1234) /
 281                      Raw('\xa5' * 100))
 282
 283         #
 284         # A couple of sub-interfaces for tags
 285         #
 286         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
 287         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
 288         sub_if_on_pg2.admin_up()
 289         sub_if_on_pg3.admin_up()
 290
 291         #
 292         # Put all the interfaces into a new bridge domain
 293         #
 294         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1)
 295         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1)
 296         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1)
 297         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1)
 298         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index,
 299                                                   L2_VTR_OP.L2_POP_1,
 300                                                   92)
 301         self.vapi.sw_interface_set_l2_tag_rewrite(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 unkown 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.sw_interface_set_l2_emulation(self.pg0.sw_if_index)
 334         self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index)
 335         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index)
 336         self.vapi.sw_interface_set_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.sw_interface_set_l2_emulation(self.pg0.sw_if_index,
 366                                                 enable=0)
 367         self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index,
 368                                                 enable=0)
 369         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index,
 370                                                 enable=0)
 371         self.vapi.sw_interface_set_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)