test/test_abf.py

   1 #!/usr/bin/env python
   2
   3 from socket import inet_pton, inet_ntop, AF_INET, AF_INET6
   4 import unittest
   5
   6 from framework import VppTestCase, VppTestRunner
   7 from vpp_ip import DpoProto
   8 from vpp_ip_route import VppIpRoute, VppRoutePath, VppMplsLabel, \
   9     VppIpTable, FibPathProto
  10
  11 from scapy.packet import Raw
  12 from scapy.layers.l2 import Ether
  13 from scapy.layers.inet import IP, UDP
  14 from scapy.layers.inet6 import IPv6
  15
  16 from vpp_object import VppObject
  17
  18 NUM_PKTS = 67
  19
  20
  21 def find_abf_policy(test, id):
  22     policies = test.vapi.abf_policy_dump()
  23     for p in policies:
  24         if id == p.policy.policy_id:
  25             return True
  26     return False
  27
  28
  29 def find_abf_itf_attach(test, id, sw_if_index):
  30     attachs = test.vapi.abf_itf_attach_dump()
  31     for a in attachs:
  32         if id == a.attach.policy_id and \
  33            sw_if_index == a.attach.sw_if_index:
  34             return True
  35     return False
  36
  37
  38 class VppAbfPolicy(VppObject):
  39
  40     def __init__(self,
  41                  test,
  42                  policy_id,
  43                  acl,
  44                  paths):
  45         self._test = test
  46         self.policy_id = policy_id
  47         self.acl = acl
  48         self.paths = paths
  49         self.encoded_paths = []
  50         for path in self.paths:
  51             self.encoded_paths.append(path.encode())
  52
  53     def add_vpp_config(self):
  54         self._test.vapi.abf_policy_add_del(
  55             1,
  56             {'policy_id': self.policy_id,
  57              'acl_index': self.acl.acl_index,
  58              'n_paths': len(self.paths),
  59              'paths': self.encoded_paths})
  60         self._test.registry.register(self, self._test.logger)
  61
  62     def remove_vpp_config(self):
  63         self._test.vapi.abf_policy_add_del(
  64             0,
  65             {'policy_id': self.policy_id,
  66              'acl_index': self.acl.acl_index,
  67              'n_paths': len(self.paths),
  68              'paths': self.encoded_paths})
  69
  70     def query_vpp_config(self):
  71         return find_abf_policy(self._test, self.policy_id)
  72
  73     def object_id(self):
  74         return ("abf-policy-%d" % self.policy_id)
  75
  76
  77 class VppAbfAttach(VppObject):
  78
  79     def __init__(self,
  80                  test,
  81                  policy_id,
  82                  sw_if_index,
  83                  priority,
  84                  is_ipv6=0):
  85         self._test = test
  86         self.policy_id = policy_id
  87         self.sw_if_index = sw_if_index
  88         self.priority = priority
  89         self.is_ipv6 = is_ipv6
  90
  91     def add_vpp_config(self):
  92         self._test.vapi.abf_itf_attach_add_del(
  93             1,
  94             {'policy_id': self.policy_id,
  95              'sw_if_index': self.sw_if_index,
  96              'priority': self.priority,
  97              'is_ipv6': self.is_ipv6})
  98         self._test.registry.register(self, self._test.logger)
  99
 100     def remove_vpp_config(self):
 101         self._test.vapi.abf_itf_attach_add_del(
 102             0,
 103             {'policy_id': self.policy_id,
 104              'sw_if_index': self.sw_if_index,
 105              'priority': self.priority,
 106              'is_ipv6': self.is_ipv6})
 107
 108     def query_vpp_config(self):
 109         return find_abf_itf_attach(self._test,
 110                                    self.policy_id,
 111                                    self.sw_if_index)
 112
 113     def object_id(self):
 114         return ("abf-attach-%d-%d" % (self.policy_id, self.sw_if_index))
 115
 116
 117 class TestAbf(VppTestCase):
 118     """ ABF Test Case """
 119
 120     @classmethod
 121     def setUpClass(cls):
 122         super(TestAbf, cls).setUpClass()
 123
 124     @classmethod
 125     def tearDownClass(cls):
 126         super(TestAbf, cls).tearDownClass()
 127
 128     def setUp(self):
 129         super(TestAbf, self).setUp()
 130
 131         self.create_pg_interfaces(range(5))
 132
 133         for i in self.pg_interfaces[:4]:
 134             i.admin_up()
 135             i.config_ip4()
 136             i.resolve_arp()
 137             i.config_ip6()
 138             i.resolve_ndp()
 139
 140     def tearDown(self):
 141         for i in self.pg_interfaces:
 142             i.unconfig_ip4()
 143             i.unconfig_ip6()
 144             i.ip6_disable()
 145             i.admin_down()
 146         super(TestAbf, self).tearDown()
 147
 148     def test_abf4(self):
 149         """ IPv4 ACL Based Forwarding
 150         """
 151
 152         #
 153         # We are not testing the various matching capabilities
 154         # of ACLs, that's done elsewhere. Here ware are testing
 155         # the application of ACLs to a forwarding path to achieve
 156         # ABF
 157         # So we construct just a few ACLs to ensure the ABF policies
 158         # are correctly constructed and used. And a few path types
 159         # to test the API path decoding.
 160         #
 161
 162         #
 163         # Rule 1
 164         #
 165         rule_1 = ({'is_permit': 1,
 166                    'is_ipv6': 0,
 167                    'proto': 17,
 168                    'srcport_or_icmptype_first': 1234,
 169                    'srcport_or_icmptype_last': 1234,
 170                    'src_ip_prefix_len': 32,
 171                    'src_ip_addr': inet_pton(AF_INET, "1.1.1.1"),
 172                    'dstport_or_icmpcode_first': 1234,
 173                    'dstport_or_icmpcode_last': 1234,
 174                    'dst_ip_prefix_len': 32,
 175                    'dst_ip_addr': inet_pton(AF_INET, "1.1.1.2")})
 176         acl_1 = self.vapi.acl_add_replace(acl_index=4294967295, r=[rule_1])
 177
 178         #
 179         # ABF policy for ACL 1 - path via interface 1
 180         #
 181         abf_1 = VppAbfPolicy(self, 10, acl_1,
 182                              [VppRoutePath(self.pg1.remote_ip4,
 183                                            self.pg1.sw_if_index)])
 184         abf_1.add_vpp_config()
 185
 186         #
 187         # Attach the policy to input interface Pg0
 188         #
 189         attach_1 = VppAbfAttach(self, 10, self.pg0.sw_if_index, 50)
 190         attach_1.add_vpp_config()
 191
 192         #
 193         # fire in packet matching the ACL src,dst. If it's forwarded
 194         # then the ABF was successful, since default routing will drop it
 195         #
 196         p_1 = (Ether(src=self.pg0.remote_mac,
 197                      dst=self.pg0.local_mac) /
 198                IP(src="1.1.1.1", dst="1.1.1.2") /
 199                UDP(sport=1234, dport=1234) /
 200                Raw('\xa5' * 100))
 201         self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg1)
 202
 203         #
 204         # Attach a 'better' priority policy to the same interface
 205         #
 206         abf_2 = VppAbfPolicy(self, 11, acl_1,
 207                              [VppRoutePath(self.pg2.remote_ip4,
 208                                            self.pg2.sw_if_index)])
 209         abf_2.add_vpp_config()
 210         attach_2 = VppAbfAttach(self, 11, self.pg0.sw_if_index, 40)
 211         attach_2.add_vpp_config()
 212
 213         self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg2)
 214
 215         #
 216         # Attach a policy with priority in the middle
 217         #
 218         abf_3 = VppAbfPolicy(self, 12, acl_1,
 219                              [VppRoutePath(self.pg3.remote_ip4,
 220                                            self.pg3.sw_if_index)])
 221         abf_3.add_vpp_config()
 222         attach_3 = VppAbfAttach(self, 12, self.pg0.sw_if_index, 45)
 223         attach_3.add_vpp_config()
 224
 225         self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg2)
 226
 227         #
 228         # remove the best priority
 229         #
 230         attach_2.remove_vpp_config()
 231         self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg3)
 232
 233         #
 234         # Attach one of the same policies to Pg1
 235         #
 236         attach_4 = VppAbfAttach(self, 12, self.pg1.sw_if_index, 45)
 237         attach_4.add_vpp_config()
 238
 239         p_2 = (Ether(src=self.pg1.remote_mac,
 240                      dst=self.pg1.local_mac) /
 241                IP(src="1.1.1.1", dst="1.1.1.2") /
 242                UDP(sport=1234, dport=1234) /
 243                Raw('\xa5' * 100))
 244         self.send_and_expect(self.pg1, p_2 * NUM_PKTS, self.pg3)
 245
 246         #
 247         # detach the policy from PG1, now expect traffic to be dropped
 248         #
 249         attach_4.remove_vpp_config()
 250
 251         self.send_and_assert_no_replies(self.pg1, p_2 * NUM_PKTS, "Detached")
 252
 253         #
 254         # Swap to route via a next-hop in the non-default table
 255         #
 256         table_20 = VppIpTable(self, 20)
 257         table_20.add_vpp_config()
 258
 259         self.pg4.set_table_ip4(table_20.table_id)
 260         self.pg4.admin_up()
 261         self.pg4.config_ip4()
 262         self.pg4.resolve_arp()
 263
 264         abf_13 = VppAbfPolicy(self, 13, acl_1,
 265                               [VppRoutePath(self.pg4.remote_ip4,
 266                                             0xffffffff,
 267                                             nh_table_id=table_20.table_id)])
 268         abf_13.add_vpp_config()
 269         attach_5 = VppAbfAttach(self, 13, self.pg0.sw_if_index, 30)
 270         attach_5.add_vpp_config()
 271
 272         self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg4)
 273
 274         self.pg4.unconfig_ip4()
 275         self.pg4.set_table_ip4(0)
 276
 277     def test_abf6(self):
 278         """ IPv6 ACL Based Forwarding
 279         """
 280
 281         #
 282         # Simple test for matching IPv6 packets
 283         #
 284
 285         #
 286         # Rule 1
 287         #
 288         rule_1 = ({'is_permit': 1,
 289                    'is_ipv6': 1,
 290                    'proto': 17,
 291                    'srcport_or_icmptype_first': 1234,
 292                    'srcport_or_icmptype_last': 1234,
 293                    'src_ip_prefix_len': 128,
 294                    'src_ip_addr': inet_pton(AF_INET6, "2001::2"),
 295                    'dstport_or_icmpcode_first': 1234,
 296                    'dstport_or_icmpcode_last': 1234,
 297                    'dst_ip_prefix_len': 128,
 298                    'dst_ip_addr': inet_pton(AF_INET6, "2001::1")})
 299         acl_1 = self.vapi.acl_add_replace(acl_index=4294967295,
 300                                           r=[rule_1])
 301
 302         #
 303         # ABF policy for ACL 1 - path via interface 1
 304         #
 305         abf_1 = VppAbfPolicy(self, 10, acl_1,
 306                              [VppRoutePath("3001::1",
 307                                            0xffffffff)])
 308         abf_1.add_vpp_config()
 309
 310         attach_1 = VppAbfAttach(self, 10, self.pg0.sw_if_index,
 311                                 45, is_ipv6=True)
 312         attach_1.add_vpp_config()
 313
 314         #
 315         # a packet matching the rule
 316         #
 317         p = (Ether(src=self.pg0.remote_mac,
 318                    dst=self.pg0.local_mac) /
 319              IPv6(src="2001::2", dst="2001::1") /
 320              UDP(sport=1234, dport=1234) /
 321              Raw('\xa5' * 100))
 322
 323         #
 324         # packets are dropped because there is no route to the policy's
 325         # next hop
 326         #
 327         self.send_and_assert_no_replies(self.pg1, p * NUM_PKTS, "no route")
 328
 329         #
 330         # add a route resolving the next-hop
 331         #
 332         route = VppIpRoute(self, "3001::1", 32,
 333                            [VppRoutePath(self.pg1.remote_ip6,
 334                                          self.pg1.sw_if_index)])
 335         route.add_vpp_config()
 336
 337         #
 338         # now expect packets forwarded.
 339         #
 340         self.send_and_expect(self.pg0, p * NUM_PKTS, self.pg1)
 341
 342
 343 if __name__ == '__main__':
 344     unittest.main(testRunner=VppTestRunner)