1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
|
#!/usr/bin/env python3
from socket import inet_pton, inet_ntop, AF_INET, AF_INET6
import unittest
from framework import VppTestCase, VppTestRunner
from vpp_ip import DpoProto
from vpp_ip_route import VppIpRoute, VppRoutePath, VppMplsLabel, \
VppIpTable, FibPathProto
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from scapy.layers.inet6 import IPv6
from vpp_object import VppObject
NUM_PKTS = 67
def find_abf_policy(test, id):
policies = test.vapi.abf_policy_dump()
for p in policies:
if id == p.policy.policy_id:
return True
return False
def find_abf_itf_attach(test, id, sw_if_index):
attachs = test.vapi.abf_itf_attach_dump()
for a in attachs:
if id == a.attach.policy_id and \
sw_if_index == a.attach.sw_if_index:
return True
return False
class VppAbfPolicy(VppObject):
def __init__(self,
test,
policy_id,
acl,
paths):
self._test = test
self.policy_id = policy_id
self.acl = acl
self.paths = paths
self.encoded_paths = []
for path in self.paths:
self.encoded_paths.append(path.encode())
def add_vpp_config(self):
self._test.vapi.abf_policy_add_del(
1,
{'policy_id': self.policy_id,
'acl_index': self.acl.acl_index,
'n_paths': len(self.paths),
'paths': self.encoded_paths})
self._test.registry.register(self, self._test.logger)
def remove_vpp_config(self):
self._test.vapi.abf_policy_add_del(
0,
{'policy_id': self.policy_id,
'acl_index': self.acl.acl_index,
'n_paths': len(self.paths),
'paths': self.encoded_paths})
def query_vpp_config(self):
return find_abf_policy(self._test, self.policy_id)
def object_id(self):
return ("abf-policy-%d" % self.policy_id)
class VppAbfAttach(VppObject):
def __init__(self,
test,
policy_id,
sw_if_index,
priority,
is_ipv6=0):
self._test = test
self.policy_id = policy_id
self.sw_if_index = sw_if_index
self.priority = priority
self.is_ipv6 = is_ipv6
def add_vpp_config(self):
self._test.vapi.abf_itf_attach_add_del(
1,
{'policy_id': self.policy_id,
'sw_if_index': self.sw_if_index,
'priority': self.priority,
'is_ipv6': self.is_ipv6})
self._test.registry.register(self, self._test.logger)
def remove_vpp_config(self):
self._test.vapi.abf_itf_attach_add_del(
0,
{'policy_id': self.policy_id,
'sw_if_index': self.sw_if_index,
'priority': self.priority,
'is_ipv6': self.is_ipv6})
def query_vpp_config(self):
return find_abf_itf_attach(self._test,
self.policy_id,
self.sw_if_index)
def object_id(self):
return ("abf-attach-%d-%d" % (self.policy_id, self.sw_if_index))
class TestAbf(VppTestCase):
""" ABF Test Case """
@classmethod
def setUpClass(cls):
super(TestAbf, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestAbf, cls).tearDownClass()
def setUp(self):
super(TestAbf, self).setUp()
self.create_pg_interfaces(range(5))
for i in self.pg_interfaces[:4]:
i.admin_up()
i.config_ip4()
i.resolve_arp()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
for i in self.pg_interfaces:
i.unconfig_ip4()
i.unconfig_ip6()
i.ip6_disable()
i.admin_down()
super(TestAbf, self).tearDown()
def test_abf4(self):
""" IPv4 ACL Based Forwarding
"""
#
# We are not testing the various matching capabilities
# of ACLs, that's done elsewhere. Here ware are testing
# the application of ACLs to a forwarding path to achieve
# ABF
# So we construct just a few ACLs to ensure the ABF policies
# are correctly constructed and used. And a few path types
# to test the API path decoding.
#
#
# Rule 1
#
rule_1 = ({'is_permit': 1,
'is_ipv6': 0,
'proto': 17,
'srcport_or_icmptype_first': 1234,
'srcport_or_icmptype_last': 1234,
'src_ip_prefix_len': 32,
'src_ip_addr': inet_pton(AF_INET, "1.1.1.1"),
'dstport_or_icmpcode_first': 1234,
'dstport_or_icmpcode_last': 1234,
'dst_ip_prefix_len': 32,
'dst_ip_addr': inet_pton(AF_INET, "1.1.1.2")})
acl_1 = self.vapi.acl_add_replace(acl_index=4294967295, r=[rule_1])
#
# ABF policy for ACL 1 - path via interface 1
#
abf_1 = VppAbfPolicy(self, 10, acl_1,
[VppRoutePath(self.pg1.remote_ip4,
self.pg1.sw_if_index)])
abf_1.add_vpp_config()
#
# Attach the policy to input interface Pg0
#
attach_1 = VppAbfAttach(self, 10, self.pg0.sw_if_index, 50)
attach_1.add_vpp_config()
#
# fire in packet matching the ACL src,dst. If it's forwarded
# then the ABF was successful, since default routing will drop it
#
p_1 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IP(src="1.1.1.1", dst="1.1.1.2") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg1)
#
# Attach a 'better' priority policy to the same interface
#
abf_2 = VppAbfPolicy(self, 11, acl_1,
[VppRoutePath(self.pg2.remote_ip4,
self.pg2.sw_if_index)])
abf_2.add_vpp_config()
attach_2 = VppAbfAttach(self, 11, self.pg0.sw_if_index, 40)
attach_2.add_vpp_config()
self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg2)
#
# Attach a policy with priority in the middle
#
abf_3 = VppAbfPolicy(self, 12, acl_1,
[VppRoutePath(self.pg3.remote_ip4,
self.pg3.sw_if_index)])
abf_3.add_vpp_config()
attach_3 = VppAbfAttach(self, 12, self.pg0.sw_if_index, 45)
attach_3.add_vpp_config()
self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg2)
#
# remove the best priority
#
attach_2.remove_vpp_config()
self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg3)
#
# Attach one of the same policies to Pg1
#
attach_4 = VppAbfAttach(self, 12, self.pg1.sw_if_index, 45)
attach_4.add_vpp_config()
p_2 = (Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac) /
IP(src="1.1.1.1", dst="1.1.1.2") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
self.send_and_expect(self.pg1, p_2 * NUM_PKTS, self.pg3)
#
# detach the policy from PG1, now expect traffic to be dropped
#
attach_4.remove_vpp_config()
self.send_and_assert_no_replies(self.pg1, p_2 * NUM_PKTS, "Detached")
#
# Swap to route via a next-hop in the non-default table
#
table_20 = VppIpTable(self, 20)
table_20.add_vpp_config()
self.pg4.set_table_ip4(table_20.table_id)
self.pg4.admin_up()
self.pg4.config_ip4()
self.pg4.resolve_arp()
abf_13 = VppAbfPolicy(self, 13, acl_1,
[VppRoutePath(self.pg4.remote_ip4,
0xffffffff,
nh_table_id=table_20.table_id)])
abf_13.add_vpp_config()
attach_5 = VppAbfAttach(self, 13, self.pg0.sw_if_index, 30)
attach_5.add_vpp_config()
self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg4)
self.pg4.unconfig_ip4()
self.pg4.set_table_ip4(0)
def test_abf6(self):
""" IPv6 ACL Based Forwarding
"""
#
# Simple test for matching IPv6 packets
#
#
# Rule 1
#
rule_1 = ({'is_permit': 1,
'is_ipv6': 1,
'proto': 17,
'srcport_or_icmptype_first': 1234,
'srcport_or_icmptype_last': 1234,
'src_ip_prefix_len': 128,
'src_ip_addr': inet_pton(AF_INET6, "2001::2"),
'dstport_or_icmpcode_first': 1234,
'dstport_or_icmpcode_last': 1234,
'dst_ip_prefix_len': 128,
'dst_ip_addr': inet_pton(AF_INET6, "2001::1")})
acl_1 = self.vapi.acl_add_replace(acl_index=4294967295,
r=[rule_1])
#
# ABF policy for ACL 1 - path via interface 1
#
abf_1 = VppAbfPolicy(self, 10, acl_1,
[VppRoutePath("3001::1",
0xffffffff)])
abf_1.add_vpp_config()
attach_1 = VppAbfAttach(self, 10, self.pg0.sw_if_index,
45, is_ipv6=True)
attach_1.add_vpp_config()
#
# a packet matching the rule
#
p = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src="2001::2", dst="2001::1") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
#
# packets are dropped because there is no route to the policy's
# next hop
#
self.send_and_assert_no_replies(self.pg1, p * NUM_PKTS, "no route")
#
# add a route resolving the next-hop
#
route = VppIpRoute(self, "3001::1", 32,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index)])
route.add_vpp_config()
#
# now expect packets forwarded.
#
self.send_and_expect(self.pg0, p * NUM_PKTS, self.pg1)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
|
