test/test_svs.py

   1 #!/usr/bin/env python3
   2
   3 import unittest
   4
   5 from framework import VppTestCase, VppTestRunner
   6 from vpp_ip_route import VppIpTable
   7
   8 from scapy.packet import Raw
   9 from scapy.layers.l2 import Ether
  10 from scapy.layers.inet import IP, UDP, ICMP
  11 from scapy.layers.inet6 import IPv6
  12
  13 from vpp_papi import VppEnum
  14
  15 NUM_PKTS = 67
  16
  17
  18 class TestSVS(VppTestCase):
  19     """ SVS Test Case """
  20
  21     @classmethod
  22     def setUpClass(cls):
  23         super(TestSVS, cls).setUpClass()
  24
  25     @classmethod
  26     def tearDownClass(cls):
  27         super(TestSVS, cls).tearDownClass()
  28
  29     def setUp(self):
  30         super(TestSVS, self).setUp()
  31
  32         # create 2 pg interfaces
  33         self.create_pg_interfaces(range(4))
  34
  35         table_id = 0
  36
  37         for i in self.pg_interfaces:
  38             i.admin_up()
  39
  40             if table_id != 0:
  41                 tbl = VppIpTable(self, table_id)
  42                 tbl.add_vpp_config()
  43                 tbl = VppIpTable(self, table_id, is_ip6=1)
  44                 tbl.add_vpp_config()
  45
  46             i.set_table_ip4(table_id)
  47             i.set_table_ip6(table_id)
  48             i.config_ip4()
  49             i.resolve_arp()
  50             i.config_ip6()
  51             i.resolve_ndp()
  52             table_id += 1
  53
  54     def tearDown(self):
  55         for i in self.pg_interfaces:
  56             i.unconfig_ip4()
  57             i.unconfig_ip6()
  58             i.set_table_ip4(0)
  59             i.set_table_ip6(0)
  60             i.admin_down()
  61         super(TestSVS, self).tearDown()
  62
  63     def test_svs4(self):
  64         """ Source VRF Select IP4 """
  65
  66         #
  67         # packets destined out of the 3 non-default table interfaces
  68         #
  69         pkts_0 = [(Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
  70                    IP(src="1.1.1.1", dst=self.pg1.remote_ip4) /
  71                    UDP(sport=1234, dport=1234) /
  72                    Raw(b'\xa5' * 100)),
  73                   (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
  74                    IP(src="2.2.2.2", dst=self.pg2.remote_ip4) /
  75                    UDP(sport=1234, dport=1234) /
  76                    Raw(b'\xa5' * 100)),
  77                   (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
  78                    IP(src="3.3.3.3", dst=self.pg3.remote_ip4) /
  79                    UDP(sport=1234, dport=1234) /
  80                    Raw(b'\xa5' * 100))]
  81         pkts_1 = [(Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
  82                    IP(src="1.1.1.1", dst=self.pg1.remote_ip4) /
  83                    UDP(sport=1234, dport=1234) /
  84                    Raw(b'\xa5' * 100)),
  85                   (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
  86                    IP(src="2.2.2.2", dst=self.pg2.remote_ip4) /
  87                    UDP(sport=1234, dport=1234) /
  88                    Raw(b'\xa5' * 100)),
  89                   (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
  90                    IP(src="3.3.3.3", dst=self.pg3.remote_ip4) /
  91                    UDP(sport=1234, dport=1234) /
  92                    Raw(b'\xa5' * 100))]
  93
  94         #
  95         # before adding the SVS config all these packets are dropped when
  96         # ingressing on pg0 since pg0 is in the default table
  97         #
  98         for p in pkts_0:
  99             self.send_and_assert_no_replies(self.pg0, p * 1)
 100
 101         #
 102         # Add table 1001 & 1002 into which we'll add the routes
 103         # determining the source VRF selection
 104         #
 105         table_ids = [101, 102]
 106
 107         for table_id in table_ids:
 108             self.vapi.svs_table_add_del(
 109                 is_add=1,
 110                 af=VppEnum.vl_api_address_family_t.ADDRESS_IP4,
 111                 table_id=table_id)
 112
 113             #
 114             # map X.0.0.0/8 to each SVS table for lookup in table X
 115             #
 116             for i in range(1, 4):
 117                 self.vapi.svs_route_add_del(
 118                     is_add=1,
 119                     prefix="%d.0.0.0/8" % i,
 120                     table_id=table_id,
 121                     source_table_id=i)
 122
 123         #
 124         # Enable SVS on pg0/pg1 using table 1001/1002
 125         #
 126         self.vapi.svs_enable_disable(
 127             is_enable=1,
 128             af=VppEnum.vl_api_address_family_t.ADDRESS_IP4,
 129             table_id=table_ids[0],
 130             sw_if_index=self.pg0.sw_if_index)
 131         self.vapi.svs_enable_disable(
 132             is_enable=1,
 133             af=VppEnum.vl_api_address_family_t.ADDRESS_IP4,
 134             table_id=table_ids[1],
 135             sw_if_index=self.pg1.sw_if_index)
 136
 137         #
 138         # now all the packets should be delivered out the respective interface
 139         #
 140         self.send_and_expect(self.pg0, pkts_0[0] * NUM_PKTS, self.pg1)
 141         self.send_and_expect(self.pg0, pkts_0[1] * NUM_PKTS, self.pg2)
 142         self.send_and_expect(self.pg0, pkts_0[2] * NUM_PKTS, self.pg3)
 143         self.send_and_expect(self.pg1, pkts_1[0] * NUM_PKTS, self.pg1)
 144         self.send_and_expect(self.pg1, pkts_1[1] * NUM_PKTS, self.pg2)
 145         self.send_and_expect(self.pg1, pkts_1[2] * NUM_PKTS, self.pg3)
 146
 147         #
 148         # check that if the SVS lookup does not match a route the packet
 149         # is forwarded using the interface's routing table
 150         #
 151         p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
 152              IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
 153              UDP(sport=1234, dport=1234) /
 154              Raw(b'\xa5' * 100))
 155         self.send_and_expect(self.pg0, p * NUM_PKTS, self.pg0)
 156
 157         p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
 158              IP(src=self.pg1.remote_ip4, dst=self.pg1.remote_ip4) /
 159              UDP(sport=1234, dport=1234) /
 160              Raw(b'\xa5' * 100))
 161         self.send_and_expect(self.pg1, p * NUM_PKTS, self.pg1)
 162
 163         #
 164         # dump the SVS configs
 165         #
 166         ss = self.vapi.svs_dump()
 167
 168         self.assertEqual(ss[0].table_id, table_ids[0])
 169         self.assertEqual(ss[0].sw_if_index, self.pg0.sw_if_index)
 170         self.assertEqual(ss[0].af, VppEnum.vl_api_address_family_t.ADDRESS_IP4)
 171         self.assertEqual(ss[1].table_id, table_ids[1])
 172         self.assertEqual(ss[1].sw_if_index, self.pg1.sw_if_index)
 173         self.assertEqual(ss[1].af, VppEnum.vl_api_address_family_t.ADDRESS_IP4)
 174
 175         #
 176         # cleanup
 177         #
 178         self.vapi.svs_enable_disable(
 179             is_enable=0,
 180             af=VppEnum.vl_api_address_family_t.ADDRESS_IP4,
 181             table_id=table_ids[0],
 182             sw_if_index=self.pg0.sw_if_index)
 183         self.vapi.svs_enable_disable(
 184             is_enable=0,
 185             af=VppEnum.vl_api_address_family_t.ADDRESS_IP4,
 186             table_id=table_ids[1],
 187             sw_if_index=self.pg1.sw_if_index)
 188
 189         for table_id in table_ids:
 190             for i in range(1, 4):
 191                 self.vapi.svs_route_add_del(
 192                     is_add=0,
 193                     prefix="%d.0.0.0/8" % i,
 194                     table_id=table_id,
 195                     source_table_id=0)
 196
 197             self.vapi.svs_table_add_del(
 198                 is_add=0,
 199                 af=VppEnum.vl_api_address_family_t.ADDRESS_IP4,
 200                 table_id=table_id)
 201
 202     def test_svs6(self):
 203         """ Source VRF Select IP6 """
 204
 205         #
 206         # packets destined out of the 3 non-default table interfaces
 207         #
 208         pkts_0 = [(Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
 209                    IPv6(src="2001:1::1", dst=self.pg1.remote_ip6) /
 210                    UDP(sport=1234, dport=1234) /
 211                    Raw(b'\xa5' * 100)),
 212                   (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
 213                    IPv6(src="2001:2::1", dst=self.pg2.remote_ip6) /
 214                    UDP(sport=1234, dport=1234) /
 215                    Raw(b'\xa5' * 100)),
 216                   (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
 217                    IPv6(src="2001:3::1", dst=self.pg3.remote_ip6) /
 218                    UDP(sport=1234, dport=1234) /
 219                    Raw(b'\xa5' * 100))]
 220         pkts_1 = [(Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
 221                    IPv6(src="2001:1::1", dst=self.pg1.remote_ip6) /
 222                    UDP(sport=1234, dport=1234) /
 223                    Raw(b'\xa5' * 100)),
 224                   (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
 225                    IPv6(src="2001:2::1", dst=self.pg2.remote_ip6) /
 226                    UDP(sport=1234, dport=1234) /
 227                    Raw(b'\xa5' * 100)),
 228                   (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
 229                    IPv6(src="2001:3::1", dst=self.pg3.remote_ip6) /
 230                    UDP(sport=1234, dport=1234) /
 231                    Raw(b'\xa5' * 100))]
 232
 233         #
 234         # before adding the SVS config all these packets are dropped when
 235         # ingressing on pg0 since pg0 is in the default table
 236         #
 237         for p in pkts_0:
 238             self.send_and_assert_no_replies(self.pg0, p * 1)
 239
 240         #
 241         # Add table 1001 & 1002 into which we'll add the routes
 242         # determining the source VRF selection
 243         #
 244         table_ids = [101, 102]
 245
 246         for table_id in table_ids:
 247             self.vapi.svs_table_add_del(
 248                 is_add=1,
 249                 af=VppEnum.vl_api_address_family_t.ADDRESS_IP6,
 250                 table_id=table_id)
 251
 252             #
 253             # map X.0.0.0/8 to each SVS table for lookup in table X
 254             #
 255             for i in range(1, 4):
 256                 self.vapi.svs_route_add_del(
 257                     is_add=1,
 258                     prefix="2001:%d::/32" % i,
 259                     table_id=table_id,
 260                     source_table_id=i)
 261
 262         #
 263         # Enable SVS on pg0/pg1 using table 1001/1002
 264         #
 265         self.vapi.svs_enable_disable(
 266             is_enable=1,
 267             af=VppEnum.vl_api_address_family_t.ADDRESS_IP6,
 268             table_id=table_ids[0],
 269             sw_if_index=self.pg0.sw_if_index)
 270         self.vapi.svs_enable_disable(
 271             is_enable=1,
 272             af=VppEnum.vl_api_address_family_t.ADDRESS_IP6,
 273             table_id=table_ids[1],
 274             sw_if_index=self.pg1.sw_if_index)
 275
 276         #
 277         # now all the packets should be delivered out the respective interface
 278         #
 279         self.send_and_expect(self.pg0, pkts_0[0] * NUM_PKTS, self.pg1)
 280         self.send_and_expect(self.pg0, pkts_0[1] * NUM_PKTS, self.pg2)
 281         self.send_and_expect(self.pg0, pkts_0[2] * NUM_PKTS, self.pg3)
 282         self.send_and_expect(self.pg1, pkts_1[0] * NUM_PKTS, self.pg1)
 283         self.send_and_expect(self.pg1, pkts_1[1] * NUM_PKTS, self.pg2)
 284         self.send_and_expect(self.pg1, pkts_1[2] * NUM_PKTS, self.pg3)
 285
 286         #
 287         # check that if the SVS lookup does not match a route the packet
 288         # is forwarded using the interface's routing table
 289         #
 290         p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
 291              IPv6(src=self.pg0.remote_ip6, dst=self.pg0.remote_ip6) /
 292              UDP(sport=1234, dport=1234) /
 293              Raw(b'\xa5' * 100))
 294         self.send_and_expect(self.pg0, p * NUM_PKTS, self.pg0)
 295
 296         p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
 297              IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
 298              UDP(sport=1234, dport=1234) /
 299              Raw(b'\xa5' * 100))
 300         self.send_and_expect(self.pg1, p * NUM_PKTS, self.pg1)
 301
 302         #
 303         # dump the SVS configs
 304         #
 305         ss = self.vapi.svs_dump()
 306
 307         self.assertEqual(ss[0].table_id, table_ids[0])
 308         self.assertEqual(ss[0].sw_if_index, self.pg0.sw_if_index)
 309         self.assertEqual(ss[0].af, VppEnum.vl_api_address_family_t.ADDRESS_IP6)
 310         self.assertEqual(ss[1].table_id, table_ids[1])
 311         self.assertEqual(ss[1].sw_if_index, self.pg1.sw_if_index)
 312         self.assertEqual(ss[1].af, VppEnum.vl_api_address_family_t.ADDRESS_IP6)
 313
 314         #
 315         # cleanup
 316         #
 317         self.vapi.svs_enable_disable(
 318             is_enable=0,
 319             af=VppEnum.vl_api_address_family_t.ADDRESS_IP6,
 320             table_id=table_ids[0],
 321             sw_if_index=self.pg0.sw_if_index)
 322         self.vapi.svs_enable_disable(
 323             is_enable=0,
 324             af=VppEnum.vl_api_address_family_t.ADDRESS_IP6,
 325             table_id=table_ids[1],
 326             sw_if_index=self.pg1.sw_if_index)
 327
 328         for table_id in table_ids:
 329             for i in range(1, 4):
 330                 self.vapi.svs_route_add_del(
 331                     is_add=0,
 332                     prefix="2001:%d::/32" % i,
 333                     table_id=table_id,
 334                     source_table_id=0)
 335
 336             self.vapi.svs_table_add_del(
 337                 is_add=0,
 338                 af=VppEnum.vl_api_address_family_t.ADDRESS_IP6,
 339                 table_id=table_id)
 340
 341 if __name__ == '__main__':
 342     unittest.main(testRunner=VppTestRunner)