summaryrefslogtreecommitdiffstats
path: root/test/test_ipip.py
blob: cb2eaafb5fc0a582a70972037bda6953a51219c2 (plain)
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
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
#!/usr/bin/env python
"""IP{4,6} over IP{v,6} tunnel functional tests"""

import unittest
from scapy.layers.inet6 import IPv6, Ether, IP, UDP, IPv6ExtHdrFragment
from scapy.all import fragment, fragment6, RandShort, defragment6
from framework import VppTestCase, VppTestRunner
from vpp_ip import DpoProto
from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable
from socket import AF_INET, AF_INET6, inet_pton
from util import reassemble4


""" Testipip is a subclass of  VPPTestCase classes.

IPIP tests.

"""


class TestIPIP(VppTestCase):
    """ IPIP Test Case """

    @classmethod
    def setUpClass(cls):
        super(TestIPIP, cls).setUpClass()
        cls.create_pg_interfaces(range(2))
        cls.interfaces = list(cls.pg_interfaces)

    def setUp(self):
        super(TestIPIP, self).setUp()
        for i in self.interfaces:
            i.admin_up()
            i.config_ip4()
            i.config_ip6()
            i.disable_ipv6_ra()
            i.resolve_arp()
            i.resolve_ndp()

    def tearDown(self):
        super(TestIPIP, self).tearDown()
        if not self.vpp_dead:
            for i in self.pg_interfaces:
                i.unconfig_ip4()
                i.unconfig_ip6()
                i.admin_down()

    def validate(self, rx, expected):
        self.assertEqual(rx, expected.__class__(expected))

    def generate_ip4_frags(self, payload_length, fragment_size):
        p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        p_payload = UDP(sport=1234, dport=1234) / self.payload(payload_length)
        p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
        outer_ip4 = (p_ether / IP(src=self.pg1.remote_ip4,
                                  id=RandShort(),
                                  dst=self.pg0.local_ip4) / p_ip4 / p_payload)
        frags = fragment(outer_ip4, fragment_size)
        p4_reply = (p_ip4 / p_payload)
        p4_reply.ttl -= 1
        return frags, p4_reply

    def test_ipip4(self):
        """ ip{v4,v6} over ip4 test """
        p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
        p_ip6 = IPv6(src="1::1", dst="DEAD::1", nh='UDP', tc=42)
        p_ip4 = IP(src="1.2.3.4", dst="130.67.0.1", tos=42)
        p_payload = UDP(sport=1234, dport=1234)

        # IPv4 transport
        rv = self.vapi.ipip_add_tunnel(
            src_address=self.pg0.local_ip4n,
            dst_address=self.pg1.remote_ip4n,
            is_ipv6=0, tc_tos=0xFF)
        sw_if_index = rv.sw_if_index

        # Set interface up and enable IP on it
        self.vapi.sw_interface_set_flags(sw_if_index, 1)
        self.vapi.sw_interface_set_unnumbered(
            ip_sw_if_index=self.pg0.sw_if_index,
            sw_if_index=sw_if_index)

        # Add IPv4 and IPv6 routes via tunnel interface
        ip4_via_tunnel = VppIpRoute(
            self, "130.67.0.0", 16,
            [VppRoutePath("0.0.0.0",
                          sw_if_index,
                          proto=DpoProto.DPO_PROTO_IP4)], is_ip6=0)
        ip4_via_tunnel.add_vpp_config()

        ip6_via_tunnel = VppIpRoute(
            self, "dead::", 16,
            [VppRoutePath("::",
                          sw_if_index,
                          proto=DpoProto.DPO_PROTO_IP6)], is_ip6=1)
        ip6_via_tunnel.add_vpp_config()

        # IPv6 in to IPv4 tunnel
        p6 = (p_ether / p_ip6 / p_payload)
        p_inner_ip6 = p_ip6
        p_inner_ip6.hlim -= 1
        p6_reply = (IP(src=self.pg0.local_ip4, dst=self.pg1.remote_ip4,
                       proto='ipv6', id=0, tos=42) / p_inner_ip6 / p_payload)
        p6_reply.ttl -= 1
        rx = self.send_and_expect(self.pg0, p6*10, self.pg1)
        for p in rx:
            self.validate(p[1], p6_reply)

        # IPv4 in to IPv4 tunnel
        p4 = (p_ether / p_ip4 / p_payload)
        p_ip4_inner = p_ip4
        p_ip4_inner.ttl -= 1
        p4_reply = (IP(src=self.pg0.local_ip4, dst=self.pg1.remote_ip4,
                       tos=42) /
                    p_ip4_inner / p_payload)
        p4_reply.ttl -= 1
        p4_reply.id = 0
        rx = self.send_and_expect(self.pg0, p4*10, self.pg1)
        for p in rx:
            self.validate(p[1], p4_reply)

        # Decapsulation
        p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)

        # IPv4 tunnel to IPv4
        p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
        p4 = (p_ether / IP(src=self.pg1.remote_ip4,
                           dst=self.pg0.local_ip4) / p_ip4 / p_payload)
        p4_reply = (p_ip4 / p_payload)
        p4_reply.ttl -= 1
        rx = self.send_and_expect(self.pg1, p4*10, self.pg0)
        for p in rx:
            self.validate(p[1], p4_reply)

        err = self.statistics.get_counter(
            '/err/ipip4-input/packets decapsulated')
        self.assertEqual(err, 10)

        # IPv4 tunnel to IPv6
        p_ip6 = IPv6(src="1:2:3::4", dst=self.pg0.remote_ip6)
        p6 = (p_ether / IP(src=self.pg1.remote_ip4,
                           dst=self.pg0.local_ip4) / p_ip6 / p_payload)
        p6_reply = (p_ip6 / p_payload)
        p6_reply.hlim = 63
        rx = self.send_and_expect(self.pg1, p6*10, self.pg0)
        for p in rx:
            self.validate(p[1], p6_reply)

        err = self.statistics.get_counter(
            '/err/ipip4-input/packets decapsulated')
        self.assertEqual(err, 20)

        #
        # Fragmentation / Reassembly and Re-fragmentation
        #
        rv = self.vapi.ip_reassembly_enable_disable(
            sw_if_index=self.pg1.sw_if_index,
            enable_ip4=1)

        # Send lots of fragments, verify reassembled packet
        frags, p4_reply = self.generate_ip4_frags(3131, 1400)
        f = []
        for i in range(0, 1000):
            f.extend(frags)
        self.pg1.add_stream(f)
        self.pg_enable_capture()
        self.pg_start()
        rx = self.pg0.get_capture(1000)

        for p in rx:
            self.validate(p[1], p4_reply)

        err = self.statistics.get_counter(
            '/err/ipip4-input/packets decapsulated')
        self.assertEqual(err, 1020)

        f = []
        r = []
        for i in range(1, 90):
            frags, p4_reply = self.generate_ip4_frags(i * 100, 1000)
            f.extend(frags)
            r.extend(p4_reply)
        self.pg_enable_capture()
        self.pg1.add_stream(f)
        self.pg_start()
        rx = self.pg0.get_capture(89)
        i = 0
        for p in rx:
            self.validate(p[1], r[i])
            i += 1

        # Now try with re-fragmentation
        #
        # Send fragments to tunnel head-end, for the tunnel head end
        # to reassemble and then refragment
        #
        self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [576, 0, 0, 0])
        frags, p4_reply = self.generate_ip4_frags(3123, 1200)
        self.pg_enable_capture()
        self.pg1.add_stream(frags)
        self.pg_start()
        rx = self.pg0.get_capture(6)
        reass_pkt = reassemble4(rx)
        p4_reply.ttl -= 1
        p4_reply.id = 256
        self.validate(reass_pkt, p4_reply)

        self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [1600, 0, 0, 0])
        frags, p4_reply = self.generate_ip4_frags(3123, 1200)
        self.pg_enable_capture()
        self.pg1.add_stream(frags)
        self.pg_start()
        rx = self.pg0.get_capture(2)
        reass_pkt = reassemble4(rx)
        p4_reply.ttl -= 1
        p4_reply.id = 512
        self.validate(reass_pkt, p4_reply)

    def test_ipip_create(self):
        """ ipip create / delete interface test """
        rv = self.vapi.ipip_add_tunnel(
            src_address=inet_pton(AF_INET, '1.2.3.4'),
            dst_address=inet_pton(AF_INET, '2.3.4.5'), is_ipv6=0)
        sw_if_index = rv.sw_if_index
        self.vapi.ipip_del_tunnel(sw_if_index)

    def test_ipip_vrf_create(self):
        """ ipip create / delete interface VRF test """

        t = VppIpTable(self, 20)
        t.add_vpp_config()
        rv = self.vapi.ipip_add_tunnel(
            src_address=inet_pton(AF_INET, '1.2.3.4'),
            dst_address=inet_pton(AF_INET, '2.3.4.5'), is_ipv6=0,
            table_id=20)
        sw_if_index = rv.sw_if_index
        self.vapi.ipip_del_tunnel(sw_if_index)

    def payload(self, len):
        return 'x' * len


class TestIPIP6(VppTestCase):
    """ IPIP6 Test Case """

    @classmethod
    def setUpClass(cls):
        super(TestIPIP6, cls).setUpClass()
        cls.create_pg_interfaces(range(2))
        cls.interfaces = list(cls.pg_interfaces)

    def setUp(self):
        super(TestIPIP6, self).setUp()
        for i in self.interfaces:
            i.admin_up()
            i.config_ip4()
            i.config_ip6()
            i.disable_ipv6_ra()
            i.resolve_arp()
            i.resolve_ndp()
        self.setup_tunnel()

    def tearDown(self):
        if not self.vpp_dead:
            self.destroy_tunnel()
            for i in self.pg_interfaces:
                i.unconfig_ip4()
                i.unconfig_ip6()
                i.admin_down()
            super(TestIPIP6, self).tearDown()

    def setup_tunnel(self):
        # IPv6 transport
        rv = self.vapi.ipip_add_tunnel(
            src_address=self.pg0.local_ip6n,
            dst_address=self.pg1.remote_ip6n, tc_tos=255)

        sw_if_index = rv.sw_if_index
        self.tunnel_if_index = sw_if_index
        self.vapi.sw_interface_set_flags(sw_if_index, 1)
        self.vapi.sw_interface_set_unnumbered(
            ip_sw_if_index=self.pg0.sw_if_index, sw_if_index=sw_if_index)

        # Add IPv4 and IPv6 routes via tunnel interface
        ip4_via_tunnel = VppIpRoute(
            self, "130.67.0.0", 16,
            [VppRoutePath("0.0.0.0",
                          sw_if_index,
                          proto=DpoProto.DPO_PROTO_IP4)], is_ip6=0)
        ip4_via_tunnel.add_vpp_config()

        ip6_via_tunnel = VppIpRoute(
            self, "dead::", 16,
            [VppRoutePath("::",
                          sw_if_index,
                          proto=DpoProto.DPO_PROTO_IP6)], is_ip6=1)
        ip6_via_tunnel.add_vpp_config()

        self.tunnel_ip6_via_tunnel = ip6_via_tunnel
        self.tunnel_ip4_via_tunnel = ip4_via_tunnel

    def destroy_tunnel(self):
        # IPv6 transport
        self.tunnel_ip4_via_tunnel.remove_vpp_config()
        self.tunnel_ip6_via_tunnel.remove_vpp_config()

        rv = self.vapi.ipip_del_tunnel(sw_if_index=self.tunnel_if_index)

    def validate(self, rx, expected):
        self.assertEqual(rx, expected.__class__(expected))

    def generate_ip6_frags(self, payload_length, fragment_size):
        p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        p_payload = UDP(sport=1234, dport=1234) / self.payload(payload_length)
        p_ip6 = IPv6(src="1::1", dst=self.pg0.remote_ip6)
        outer_ip6 = (p_ether / IPv6(src=self.pg1.remote_ip6,
                                    dst=self.pg0.local_ip6) /
                     IPv6ExtHdrFragment() / p_ip6 / p_payload)
        frags = fragment6(outer_ip6, fragment_size)
        p6_reply = (p_ip6 / p_payload)
        p6_reply.hlim -= 1
        return frags, p6_reply

    def generate_ip6_hairpin_frags(self, payload_length, fragment_size):
        p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        p_payload = UDP(sport=1234, dport=1234) / self.payload(payload_length)
        p_ip6 = IPv6(src="1::1", dst="dead::1")
        outer_ip6 = (p_ether / IPv6(src=self.pg1.remote_ip6,
                                    dst=self.pg0.local_ip6) /
                     IPv6ExtHdrFragment() / p_ip6 / p_payload)
        frags = fragment6(outer_ip6, fragment_size)
        p_ip6.hlim -= 1
        p6_reply = (IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6,
                         hlim=63) / p_ip6 / p_payload)

        return frags, p6_reply

    def test_encap(self):
        """ ip{v4,v6} over ip6 test encap """
        p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
        p_ip6 = IPv6(src="1::1", dst="DEAD::1", tc=42, nh='UDP')
        p_ip4 = IP(src="1.2.3.4", dst="130.67.0.1", tos=42)
        p_payload = UDP(sport=1234, dport=1234)

        # Encapsulation
        # IPv6 in to IPv6 tunnel
        p6 = (p_ether / p_ip6 / p_payload)
        p6_reply = (IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6,
                         hlim=64, tc=42) /
                    p_ip6 / p_payload)
        p6_reply[1].hlim -= 1
        rx = self.send_and_expect(self.pg0, p6*11, self.pg1)
        for p in rx:
            self.validate(p[1], p6_reply)

        # IPv4 in to IPv6 tunnel
        p4 = (p_ether / p_ip4 / p_payload)
        p4_reply = (IPv6(src=self.pg0.local_ip6,
                         dst=self.pg1.remote_ip6, hlim=64, tc=42) /
                    p_ip4 / p_payload)
        p4_reply[1].ttl -= 1
        rx = self.send_and_expect(self.pg0, p4*11, self.pg1)
        for p in rx:
            self.validate(p[1], p4_reply)

    def test_decap(self):
        """ ip{v4,v6} over ip6 test decap """

        p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        p_ip6 = IPv6(src="1::1", dst="DEAD::1", tc=42, nh='UDP')
        p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
        p_payload = UDP(sport=1234, dport=1234)

        # Decapsulation
        # IPv6 tunnel to IPv4

        p4 = (p_ether / IPv6(src=self.pg1.remote_ip6,
                             dst=self.pg0.local_ip6) / p_ip4 / p_payload)
        p4_reply = (p_ip4 / p_payload)
        p4_reply.ttl -= 1
        rx = self.send_and_expect(self.pg1, p4*11, self.pg0)
        for p in rx:
            self.validate(p[1], p4_reply)

        # IPv6 tunnel to IPv6
        p_ip6 = IPv6(src="1:2:3::4", dst=self.pg0.remote_ip6)
        p6 = (p_ether / IPv6(src=self.pg1.remote_ip6,
                             dst=self.pg0.local_ip6) / p_ip6 / p_payload)
        p6_reply = (p_ip6 / p_payload)
        p6_reply.hlim = 63
        rx = self.send_and_expect(self.pg1, p6*11, self.pg0)
        for p in rx:
            self.validate(p[1], p6_reply)

    def test_frag(self):
        """ ip{v4,v6} over ip6 test frag """

        p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
        p_ip6 = IPv6(src="1::1", dst="DEAD::1", tc=42, nh='UDP')
        p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
        p_payload = UDP(sport=1234, dport=1234)

        #
        # Fragmentation / Reassembly and Re-fragmentation
        #
        rv = self.vapi.ip_reassembly_enable_disable(
            sw_if_index=self.pg1.sw_if_index,
            enable_ip6=1)

        # Send lots of fragments, verify reassembled packet
        before_cnt = self.statistics.get_counter(
            '/err/ipip6-input/packets decapsulated')
        frags, p6_reply = self.generate_ip6_frags(3131, 1400)
        f = []
        for i in range(0, 1000):
            f.extend(frags)
        self.pg1.add_stream(f)
        self.pg_enable_capture()
        self.pg_start()
        rx = self.pg0.get_capture(1000)

        for p in rx:
            self.validate(p[1], p6_reply)

        cnt = self.statistics.get_counter(
            '/err/ipip6-input/packets decapsulated')
        self.assertEqual(cnt, before_cnt + 1000)

        f = []
        r = []
        # TODO: Check out why reassembly of atomic fragments don't work
        for i in range(10, 90):
            frags, p6_reply = self.generate_ip6_frags(i * 100, 1000)
            f.extend(frags)
            r.extend(p6_reply)
        self.pg_enable_capture()
        self.pg1.add_stream(f)
        self.pg_start()
        rx = self.pg0.get_capture(80)
        i = 0
        for p in rx:
            self.validate(p[1], r[i])
            i += 1

        # Simple fragmentation
        p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
        self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [1280, 0, 0, 0])

        # IPv6 in to IPv6 tunnel
        p_payload = UDP(sport=1234, dport=1234) / self.payload(1300)

        p6 = (p_ether / p_ip6 / p_payload)
        p6_reply = (IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6,
                         hlim=63, tc=42) /
                    p_ip6 / p_payload)
        p6_reply[1].hlim -= 1
        self.pg_enable_capture()
        self.pg0.add_stream(p6)
        self.pg_start()
        rx = self.pg1.get_capture(2)

        # Scapy defragment doesn't deal well with multiple layers
        # of samy type / Ethernet header first
        f = [p[1] for p in rx]
        reass_pkt = defragment6(f)
        self.validate(reass_pkt, p6_reply)

        # Now try with re-fragmentation
        #
        # Send large fragments to tunnel head-end, for the tunnel head end
        # to reassemble and then refragment out the tunnel again.
        # Hair-pinning
        #
        self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [1280, 0, 0, 0])
        frags, p6_reply = self.generate_ip6_hairpin_frags(8000, 1200)
        self.pg_enable_capture()
        self.pg1.add_stream(frags)
        self.pg_start()
        rx = self.pg1.get_capture(7)
        f = [p[1] for p in rx]
        reass_pkt = defragment6(f)
        p6_reply.id = 256
        self.validate(reass_pkt, p6_reply)

    def test_ipip_create(self):
        """ ipip create / delete interface test """
        rv = self.vapi.ipip_add_tunnel(
            src_address=inet_pton(AF_INET, '1.2.3.4'),
            dst_address=inet_pton(AF_INET, '2.3.4.5'), is_ipv6=0)
        sw_if_index = rv.sw_if_index
        self.vapi.ipip_del_tunnel(sw_if_index)

    def test_ipip_vrf_create(self):
        """ ipip create / delete interface VRF test """

        t = VppIpTable(self, 20)
        t.add_vpp_config()
        rv = self.vapi.ipip_add_tunnel(
            src_address=inet_pton(AF_INET, '1.2.3.4'),
            dst_address=inet_pton(AF_INET, '2.3.4.5'), is_ipv6=0,
            table_id=20)
        sw_if_index = rv.sw_if_index
        self.vapi.ipip_del_tunnel(sw_if_index)

    def payload(self, len):
        return 'x' * len


if __name__ == '__main__':
    unittest.main(testRunner=VppTestRunner)