3 from socket import inet_pton, inet_ntop, AF_INET, AF_INET6
6 from framework import VppTestCase, VppTestRunner
7 from vpp_ip import DpoProto
8 from vpp_ip_route import VppIpRoute, VppRoutePath, VppMplsLabel, VppIpTable
10 from scapy.packet import Raw
11 from scapy.layers.l2 import Ether
12 from scapy.layers.inet import IP, UDP
13 from scapy.layers.inet6 import IPv6
15 from vpp_object import VppObject
18 def find_abf_policy(test, id):
19 policies = test.vapi.abf_policy_dump()
21 if id == p.policy.policy_id:
26 def find_abf_itf_attach(test, id, sw_if_index):
27 attachs = test.vapi.abf_itf_attach_dump()
29 if id == a.attach.policy_id and \
30 sw_if_index == a.attach.sw_if_index:
35 class VppAbfPolicy(VppObject):
43 self.policy_id = policy_id
47 def encode_paths(self):
52 if type(l) == VppMplsLabel:
53 lstack.append(l.encode())
55 lstack.append({'label': l, 'ttl': 255})
56 n_labels = len(lstack)
57 while (len(lstack) < 16):
59 br_paths.append({'next_hop': p.nh_addr,
62 'sw_if_index': 0xffffffff,
64 'table_id': p.nh_table_id,
65 'next_hop_id': p.next_hop_id,
66 'is_udp_encap': p.is_udp_encap,
68 'label_stack': lstack})
71 def add_vpp_config(self):
72 self._test.vapi.abf_policy_add_del(
74 {'policy_id': self.policy_id,
75 'acl_index': self.acl.acl_index,
76 'n_paths': len(self.paths),
77 'paths': self.encode_paths()})
78 self._test.registry.register(self, self._test.logger)
80 def remove_vpp_config(self):
81 self._test.vapi.abf_policy_add_del(
83 {'policy_id': self.policy_id,
84 'acl_index': self.acl.acl_index,
85 'n_paths': len(self.paths),
86 'paths': self.encode_paths()})
88 def query_vpp_config(self):
89 return find_abf_policy(self._test, self.policy_id)
92 return ("abf-policy-%d" % self.policy_id)
95 class VppAbfAttach(VppObject):
104 self.policy_id = policy_id
105 self.sw_if_index = sw_if_index
106 self.priority = priority
107 self.is_ipv6 = is_ipv6
109 def add_vpp_config(self):
110 self._test.vapi.abf_itf_attach_add_del(
112 {'policy_id': self.policy_id,
113 'sw_if_index': self.sw_if_index,
114 'priority': self.priority,
115 'is_ipv6': self.is_ipv6})
116 self._test.registry.register(self, self._test.logger)
118 def remove_vpp_config(self):
119 self._test.vapi.abf_itf_attach_add_del(
121 {'policy_id': self.policy_id,
122 'sw_if_index': self.sw_if_index,
123 'priority': self.priority,
124 'is_ipv6': self.is_ipv6})
126 def query_vpp_config(self):
127 return find_abf_itf_attach(self._test,
132 return ("abf-attach-%d-%d" % (self.policy_id, self.sw_if_index))
135 class TestAbf(VppTestCase):
136 """ ABF Test Case """
140 super(TestAbf, cls).setUpClass()
143 def tearDownClass(cls):
144 super(TestAbf, cls).tearDownClass()
147 super(TestAbf, self).setUp()
149 self.create_pg_interfaces(range(5))
151 for i in self.pg_interfaces[:4]:
159 for i in self.pg_interfaces:
164 super(TestAbf, self).tearDown()
167 """ IPv4 ACL Based Forwarding
171 # We are not testing the various matching capabilities
172 # of ACLs, that's done elsewhere. Here ware are testing
173 # the application of ACLs to a forwarding path to achieve
175 # So we construct just a few ACLs to ensure the ABF policies
176 # are correctly constructed and used. And a few path types
177 # to test the API path decoding.
183 rule_1 = ({'is_permit': 1,
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, "1.1.1.1"),
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, "1.1.1.2")})
194 acl_1 = self.vapi.acl_add_replace(acl_index=4294967295, r=[rule_1])
197 # ABF policy for ACL 1 - path via interface 1
199 abf_1 = VppAbfPolicy(self, 10, acl_1,
200 [VppRoutePath(self.pg1.remote_ip4,
201 self.pg1.sw_if_index)])
202 abf_1.add_vpp_config()
205 # Attach the policy to input interface Pg0
207 attach_1 = VppAbfAttach(self, 10, self.pg0.sw_if_index, 50)
208 attach_1.add_vpp_config()
211 # fire in packet matching the ACL src,dst. If it's forwarded
212 # then the ABF was successful, since default routing will drop it
214 p_1 = (Ether(src=self.pg0.remote_mac,
215 dst=self.pg0.local_mac) /
216 IP(src="1.1.1.1", dst="1.1.1.2") /
217 UDP(sport=1234, dport=1234) /
219 self.send_and_expect(self.pg0, p_1*65, self.pg1)
222 # Attach a 'better' priority policy to the same interface
224 abf_2 = VppAbfPolicy(self, 11, acl_1,
225 [VppRoutePath(self.pg2.remote_ip4,
226 self.pg2.sw_if_index)])
227 abf_2.add_vpp_config()
228 attach_2 = VppAbfAttach(self, 11, self.pg0.sw_if_index, 40)
229 attach_2.add_vpp_config()
231 self.send_and_expect(self.pg0, p_1*65, self.pg2)
234 # Attach a policy with priority in the middle
236 abf_3 = VppAbfPolicy(self, 12, acl_1,
237 [VppRoutePath(self.pg3.remote_ip4,
238 self.pg3.sw_if_index)])
239 abf_3.add_vpp_config()
240 attach_3 = VppAbfAttach(self, 12, self.pg0.sw_if_index, 45)
241 attach_3.add_vpp_config()
243 self.send_and_expect(self.pg0, p_1*65, self.pg2)
246 # remove the best priority
248 attach_2.remove_vpp_config()
249 self.send_and_expect(self.pg0, p_1*65, self.pg3)
252 # Attach one of the same policies to Pg1
254 attach_4 = VppAbfAttach(self, 12, self.pg1.sw_if_index, 45)
255 attach_4.add_vpp_config()
257 p_2 = (Ether(src=self.pg1.remote_mac,
258 dst=self.pg1.local_mac) /
259 IP(src="1.1.1.1", dst="1.1.1.2") /
260 UDP(sport=1234, dport=1234) /
262 self.send_and_expect(self.pg1, p_2 * 65, self.pg3)
265 # detach the policy from PG1, now expect traffic to be dropped
267 attach_4.remove_vpp_config()
269 self.send_and_assert_no_replies(self.pg1, p_2 * 65, "Detached")
272 # Swap to route via a next-hop in the non-default table
274 table_20 = VppIpTable(self, 20)
275 table_20.add_vpp_config()
277 self.pg4.set_table_ip4(table_20.table_id)
279 self.pg4.config_ip4()
280 self.pg4.resolve_arp()
282 abf_13 = VppAbfPolicy(self, 13, acl_1,
283 [VppRoutePath(self.pg4.remote_ip4,
285 nh_table_id=table_20.table_id)])
286 abf_13.add_vpp_config()
287 attach_5 = VppAbfAttach(self, 13, self.pg0.sw_if_index, 30)
288 attach_5.add_vpp_config()
290 self.send_and_expect(self.pg0, p_1*65, self.pg4)
292 self.pg4.unconfig_ip4()
293 self.pg4.set_table_ip4(0)
296 """ IPv6 ACL Based Forwarding
300 # Simple test for matching IPv6 packets
306 rule_1 = ({'is_permit': 1,
309 'srcport_or_icmptype_first': 1234,
310 'srcport_or_icmptype_last': 1234,
311 'src_ip_prefix_len': 128,
312 'src_ip_addr': inet_pton(AF_INET6, "2001::2"),
313 'dstport_or_icmpcode_first': 1234,
314 'dstport_or_icmpcode_last': 1234,
315 'dst_ip_prefix_len': 128,
316 'dst_ip_addr': inet_pton(AF_INET6, "2001::1")})
317 acl_1 = self.vapi.acl_add_replace(acl_index=4294967295,
321 # ABF policy for ACL 1 - path via interface 1
323 abf_1 = VppAbfPolicy(self, 10, acl_1,
324 [VppRoutePath("3001::1",
326 proto=DpoProto.DPO_PROTO_IP6)])
327 abf_1.add_vpp_config()
329 attach_1 = VppAbfAttach(self, 10, self.pg0.sw_if_index,
331 attach_1.add_vpp_config()
334 # a packet matching the rule
336 p = (Ether(src=self.pg0.remote_mac,
337 dst=self.pg0.local_mac) /
338 IPv6(src="2001::2", dst="2001::1") /
339 UDP(sport=1234, dport=1234) /
343 # packets are dropped because there is no route to the policy's
346 self.send_and_assert_no_replies(self.pg1, p * 65, "no route")
349 # add a route resolving the next-hop
351 route = VppIpRoute(self, "3001::1", 32,
352 [VppRoutePath(self.pg1.remote_ip6,
353 self.pg1.sw_if_index,
354 proto=DpoProto.DPO_PROTO_IP6)],
356 route.add_vpp_config()
359 # now expect packets forwarded.
361 self.send_and_expect(self.pg0, p * 65, self.pg1)
364 if __name__ == '__main__':
365 unittest.main(testRunner=VppTestRunner)