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
  17
  18 class TestDVR(VppTestCase):
  19     """ Distributed Virtual Router """
  20
  21     def setUp(self):
  22         super(TestDVR, self).setUp()
  23
  24         self.create_pg_interfaces(range(4))
  25         self.create_loopback_interfaces(range(1))
  26
  27         for i in self.pg_interfaces:
  28             i.admin_up()
  29
  30         self.loop0.config_ip4()
  31
  32     def tearDown(self):
  33         for i in self.pg_interfaces:
  34             i.admin_down()
  35         self.loop0.unconfig_ip4()
  36
  37         super(TestDVR, self).tearDown()
  38
  39     def assert_same_mac_addr(self, tx, rx):
  40         t_eth = tx[Ether]
  41         for p in rx:
  42             r_eth = p[Ether]
  43             self.assertEqual(t_eth.src, r_eth.src)
  44             self.assertEqual(t_eth.dst, r_eth.dst)
  45
  46     def assert_has_vlan_tag(self, tag, rx):
  47         for p in rx:
  48             r_1q = p[Dot1Q]
  49             self.assertEqual(tag, r_1q.vlan)
  50
  51     def assert_has_no_tag(self, rx):
  52         for p in rx:
  53             self.assertFalse(p.haslayer(Dot1Q))
  54
  55     def test_dvr(self):
  56         """ Distributed Virtual Router """
  57
  58         #
  59         # A packet destined to an IP address that is L2 bridged via
  60         # a non-tag interface
  61         #
  62         ip_non_tag_bridged = "10.10.10.10"
  63         ip_tag_bridged = "10.10.10.11"
  64         any_src_addr = "1.1.1.1"
  65
  66         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
  67                             dst=self.loop0.local_mac) /
  68                       IP(src=any_src_addr,
  69                          dst=ip_non_tag_bridged) /
  70                       UDP(sport=1234, dport=1234) /
  71                       Raw('\xa5' * 100))
  72         pkt_tag = (Ether(src=self.pg0.remote_mac,
  73                          dst=self.loop0.local_mac) /
  74                    IP(src=any_src_addr,
  75                       dst=ip_tag_bridged) /
  76                    UDP(sport=1234, dport=1234) /
  77                    Raw('\xa5' * 100))
  78
  79         #
  80         # Two sub-interfaces so we can test VLAN tag push/pop
  81         #
  82         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
  83         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
  84         sub_if_on_pg2.admin_up()
  85         sub_if_on_pg3.admin_up()
  86
  87         #
  88         # Put all the interfaces into a new bridge domain
  89         #
  90         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1)
  91         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1)
  92         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1)
  93         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1)
  94         self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index, 1, bvi=1)
  95
  96         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index,
  97                                                   L2_VTR_OP.L2_POP_1,
  98                                                   92)
  99         self.vapi.sw_interface_set_l2_tag_rewrite(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                           proto=DpoProto.DPO_PROTO_ETHERNET)])
 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         self.pg0.add_stream(pkt_no_tag)
 118
 119         self.pg_enable_capture(self.pg_interfaces)
 120         self.pg_start()
 121
 122         rx = self.pg1.get_capture(1)
 123
 124         self.assertEqual(rx[0][Ether].dst, pkt_no_tag[Ether].dst)
 125         self.assertEqual(rx[0][Ether].src, pkt_no_tag[Ether].src)
 126
 127         #
 128         # Add routes to bridge the traffic via a tagged interface
 129         #
 130         route_with_tag = VppIpRoute(
 131             self, ip_tag_bridged, 32,
 132             [VppRoutePath("0.0.0.0",
 133                           sub_if_on_pg3.sw_if_index,
 134                           proto=DpoProto.DPO_PROTO_ETHERNET)])
 135         route_with_tag.add_vpp_config()
 136
 137         #
 138         # Inject the packet that arrives and leaves on a non-tagged interface
 139         # Since it's 'bridged' expect that the MAC headed is unchanged.
 140         #
 141         rx = self.send_and_expect(self.pg0, pkt_tag * 65, self.pg3)
 142         self.assert_same_mac_addr(pkt_tag, rx)
 143         self.assert_has_vlan_tag(93, rx)
 144
 145         #
 146         # Tag to tag
 147         #
 148         pkt_tag_to_tag = (Ether(src=self.pg2.remote_mac,
 149                                 dst=self.loop0.local_mac) /
 150                           Dot1Q(vlan=92) /
 151                           IP(src=any_src_addr,
 152                              dst=ip_tag_bridged) /
 153                           UDP(sport=1234, dport=1234) /
 154                           Raw('\xa5' * 100))
 155
 156         rx = self.send_and_expect(self.pg2, pkt_tag_to_tag * 65, self.pg3)
 157         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 158         self.assert_has_vlan_tag(93, rx)
 159
 160         #
 161         # Tag to non-Tag
 162         #
 163         pkt_tag_to_non_tag = (Ether(src=self.pg2.remote_mac,
 164                                     dst=self.loop0.local_mac) /
 165                               Dot1Q(vlan=92) /
 166                               IP(src=any_src_addr,
 167                                  dst=ip_non_tag_bridged) /
 168                               UDP(sport=1234, dport=1234) /
 169                               Raw('\xa5' * 100))
 170
 171         rx = self.send_and_expect(self.pg2, pkt_tag_to_non_tag * 65, self.pg1)
 172         self.assert_same_mac_addr(pkt_tag_to_tag, rx)
 173         self.assert_has_no_tag(rx)
 174
 175         #
 176         # cleanup
 177         #
 178         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1,
 179                                              enable=0)
 180         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1,
 181                                              enable=0)
 182         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
 183                                              1, enable=0)
 184         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
 185                                              1, enable=0)
 186         self.vapi.sw_interface_set_l2_bridge(self.loop0.sw_if_index,
 187                                              1, bvi=1, enable=0)
 188
 189         #
 190         # the explicit route delete is require so it happens before
 191         # the sbu-interface delete. subinterface delete is required
 192         # because that object type does not use the object registry
 193         #
 194         route_no_tag.remove_vpp_config()
 195         route_with_tag.remove_vpp_config()
 196         sub_if_on_pg3.remove_vpp_config()
 197         sub_if_on_pg2.remove_vpp_config()
 198
 199     def test_l2_emulation(self):
 200         """ L2 Emulation """
 201
 202         #
 203         # non distinct L3 packets, in the tag/non-tag combos
 204         #
 205         pkt_no_tag = (Ether(src=self.pg0.remote_mac,
 206                             dst=self.pg1.remote_mac) /
 207                       IP(src="2.2.2.2",
 208                          dst="1.1.1.1") /
 209                       UDP(sport=1234, dport=1234) /
 210                       Raw('\xa5' * 100))
 211         pkt_to_tag = (Ether(src=self.pg0.remote_mac,
 212                             dst=self.pg2.remote_mac) /
 213                       IP(src="2.2.2.2",
 214                          dst="1.1.1.2") /
 215                       UDP(sport=1234, dport=1234) /
 216                       Raw('\xa5' * 100))
 217         pkt_from_tag = (Ether(src=self.pg3.remote_mac,
 218                               dst=self.pg2.remote_mac) /
 219                         Dot1Q(vlan=93) /
 220                         IP(src="2.2.2.2",
 221                            dst="1.1.1.1") /
 222                         UDP(sport=1234, dport=1234) /
 223                         Raw('\xa5' * 100))
 224         pkt_from_to_tag = (Ether(src=self.pg3.remote_mac,
 225                                  dst=self.pg2.remote_mac) /
 226                            Dot1Q(vlan=93) /
 227                            IP(src="2.2.2.2",
 228                               dst="1.1.1.2") /
 229                            UDP(sport=1234, dport=1234) /
 230                            Raw('\xa5' * 100))
 231         pkt_bcast = (Ether(src=self.pg0.remote_mac,
 232                            dst="ff:ff:ff:ff:ff:ff") /
 233                      IP(src="2.2.2.2",
 234                         dst="255.255.255.255") /
 235                      UDP(sport=1234, dport=1234) /
 236                      Raw('\xa5' * 100))
 237
 238         #
 239         # A couple of sub-interfaces for tags
 240         #
 241         sub_if_on_pg2 = VppDot1QSubint(self, self.pg2, 92)
 242         sub_if_on_pg3 = VppDot1QSubint(self, self.pg3, 93)
 243         sub_if_on_pg2.admin_up()
 244         sub_if_on_pg3.admin_up()
 245
 246         #
 247         # Put all the interfaces into a new bridge domain
 248         #
 249         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index, 1)
 250         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index, 1)
 251         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index, 1)
 252         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index, 1)
 253         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg2.sw_if_index,
 254                                                   L2_VTR_OP.L2_POP_1,
 255                                                   92)
 256         self.vapi.sw_interface_set_l2_tag_rewrite(sub_if_on_pg3.sw_if_index,
 257                                                   L2_VTR_OP.L2_POP_1,
 258                                                   93)
 259
 260         #
 261         # Disable UU flooding, learning and ARM terminaation. makes this test
 262         # easier as unicast packets are dropped if not extracted.
 263         #
 264         self.vapi.bridge_flags(1, 0, (1 << 0) | (1 << 3) | (1 << 4))
 265
 266         #
 267         # Add a DVR route to steer traffic at L3
 268         #
 269         route_1 = VppIpRoute(self, "1.1.1.1", 32,
 270                              [VppRoutePath("0.0.0.0",
 271                                            self.pg1.sw_if_index,
 272                                            proto=DpoProto.DPO_PROTO_ETHERNET)])
 273         route_2 = VppIpRoute(self, "1.1.1.2", 32,
 274                              [VppRoutePath("0.0.0.0",
 275                                            sub_if_on_pg2.sw_if_index,
 276                                            proto=DpoProto.DPO_PROTO_ETHERNET)])
 277         route_1.add_vpp_config()
 278         route_2.add_vpp_config()
 279
 280         #
 281         # packets are dropped because bridge does not flood unkown unicast
 282         #
 283         self.send_and_assert_no_replies(self.pg0, pkt_no_tag)
 284
 285         #
 286         # Enable L3 extraction on pgs
 287         #
 288         self.vapi.sw_interface_set_l2_emulation(self.pg0.sw_if_index)
 289         self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index)
 290         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index)
 291         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg3.sw_if_index)
 292
 293         #
 294         # now we expect the packet forward according to the DVR route
 295         #
 296         rx = self.send_and_expect(self.pg0, pkt_no_tag * 65, self.pg1)
 297         self.assert_same_mac_addr(pkt_no_tag, rx)
 298         self.assert_has_no_tag(rx)
 299
 300         rx = self.send_and_expect(self.pg0, pkt_to_tag * 65, self.pg2)
 301         self.assert_same_mac_addr(pkt_to_tag, rx)
 302         self.assert_has_vlan_tag(92, rx)
 303
 304         rx = self.send_and_expect(self.pg3, pkt_from_tag * 65, self.pg1)
 305         self.assert_same_mac_addr(pkt_from_tag, rx)
 306         self.assert_has_no_tag(rx)
 307
 308         rx = self.send_and_expect(self.pg3, pkt_from_to_tag * 65, self.pg2)
 309         self.assert_same_mac_addr(pkt_from_tag, rx)
 310         self.assert_has_vlan_tag(92, rx)
 311
 312         #
 313         # but broadcast packets are still flooded
 314         #
 315         self.send_and_expect(self.pg0, pkt_bcast * 33, self.pg2)
 316
 317         #
 318         # cleanup
 319         #
 320         self.vapi.sw_interface_set_l2_emulation(self.pg0.sw_if_index,
 321                                                 enable=0)
 322         self.vapi.sw_interface_set_l2_emulation(self.pg1.sw_if_index,
 323                                                 enable=0)
 324         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg2.sw_if_index,
 325                                                 enable=0)
 326         self.vapi.sw_interface_set_l2_emulation(sub_if_on_pg3.sw_if_index,
 327                                                 enable=0)
 328
 329         self.vapi.sw_interface_set_l2_bridge(self.pg0.sw_if_index,
 330                                              1, enable=0)
 331         self.vapi.sw_interface_set_l2_bridge(self.pg1.sw_if_index,
 332                                              1, enable=0)
 333         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg2.sw_if_index,
 334                                              1, enable=0)
 335         self.vapi.sw_interface_set_l2_bridge(sub_if_on_pg3.sw_if_index,
 336                                              1, enable=0)
 337
 338         route_1.remove_vpp_config()
 339         route_2.remove_vpp_config()
 340         sub_if_on_pg3.remove_vpp_config()
 341         sub_if_on_pg2.remove_vpp_config()
 342
 343
 344 if __name__ == '__main__':
 345     unittest.main(testRunner=VppTestRunner)