summaryrefslogtreecommitdiffstats
path: root/test/test_l2bd_arp_term.py
blob: 4566377f895a2073ea5721830a3f49f89a0bf5b9 (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
#!/usr/bin/env python3
""" L2BD ARP term Test """

import unittest

from socket import AF_INET6, inet_pton, inet_ntop

from scapy.layers.l2 import Ether, ARP
from scapy.utils6 import (
    in6_getnsma,
    in6_ptop,
)
from scapy.layers.inet6 import (
    IPv6,
    ICMPv6ND_NS,
    ICMPv6NDOptSrcLLAddr,
    ICMPv6NDOptSrcLLAddr,
    ICMPv6ND_NA,
    ICMPv6NDOptDstLLAddr,
)

from framework import VppTestCase
from asfframework import VppTestRunner
from util import Host


class TestL2bdArpTerm(VppTestCase):
    """L2BD arp termination Test Case"""

    @classmethod
    def setUpClass(cls):
        """
        Perform standard class setup (defined by class method setUpClass in
        class VppTestCase) before running the test case, set test case related
        variables and configure VPP.
        """
        super(TestL2bdArpTerm, cls).setUpClass()

        try:
            # Create pg interfaces
            n_bd = 1
            cls.ifs_per_bd = ifs_per_bd = 3
            n_ifs = n_bd * ifs_per_bd
            cls.create_pg_interfaces(range(n_ifs))

            # Set up all interfaces
            for i in cls.pg_interfaces:
                i.admin_up()

            cls.hosts = set()

        except Exception:
            super(TestL2bdArpTerm, cls).tearDownClass()
            raise

    @classmethod
    def tearDownClass(cls):
        super(TestL2bdArpTerm, cls).tearDownClass()

    def setUp(self):
        """
        Clear trace and packet infos before running each test.
        """
        self.reset_packet_infos()
        super(TestL2bdArpTerm, self).setUp()

    def tearDown(self):
        """
        Show various debug prints after each test.
        """
        super(TestL2bdArpTerm, self).tearDown()

    def show_commands_at_teardown(self):
        self.logger.info(self.vapi.ppcli("show l2fib verbose"))
        # many tests delete bridge-domain 1 as the last task.  don't output
        # the details of a non-existent bridge-domain.
        if self.vapi.l2_fib_table_dump(bd_id=1):
            self.logger.info(self.vapi.ppcli("show bridge-domain 1 detail"))

    def add_del_arp_term_hosts(self, entries, bd_id=1, is_add=1, is_ipv6=0):
        for e in entries:
            ip = e.ip4 if is_ipv6 == 0 else e.ip6
            self.vapi.bd_ip_mac_add_del(
                is_add=is_add, entry={"bd_id": bd_id, "ip": ip, "mac": e.mac}
            )

    @classmethod
    def mac_list(cls, b6_range):
        return ["00:00:ca:fe:00:%02x" % b6 for b6 in b6_range]

    @classmethod
    def ip4_host(cls, subnet, host, mac):
        return Host(mac=mac, ip4="172.17.1%02u.%u" % (subnet, host))

    @classmethod
    def ip4_hosts(cls, subnet, start, mac_list):
        return {
            cls.ip4_host(subnet, start + j, mac_list[j]) for j in range(len(mac_list))
        }

    @classmethod
    def ip6_host(cls, subnet, host, mac):
        return Host(mac=mac, ip6="fd01:%x::%x" % (subnet, host))

    @classmethod
    def ip6_hosts(cls, subnet, start, mac_list):
        return {
            cls.ip6_host(subnet, start + j, mac_list[j]) for j in range(len(mac_list))
        }

    @classmethod
    def bd_swifs(cls, b):
        n = cls.ifs_per_bd
        start = (b - 1) * n
        return [cls.pg_interfaces[j] for j in range(start, start + n)]

    def bd_add_del(self, bd_id=1, is_add=1):
        if is_add:
            self.vapi.bridge_domain_add_del_v2(
                bd_id=bd_id, is_add=is_add, flood=1, uu_flood=1, forward=1, learn=1
            )
        for swif in self.bd_swifs(bd_id):
            swif_idx = swif.sw_if_index
            self.vapi.sw_interface_set_l2_bridge(
                rx_sw_if_index=swif_idx, bd_id=bd_id, enable=is_add
            )
        if not is_add:
            self.vapi.bridge_domain_add_del_v2(bd_id=bd_id, is_add=is_add)

    @classmethod
    def arp_req(cls, src_host, host):
        return Ether(dst="ff:ff:ff:ff:ff:ff", src=src_host.mac) / ARP(
            op="who-has", hwsrc=src_host.bin_mac, pdst=host.ip4, psrc=src_host.ip4
        )

    @classmethod
    def arp_reqs(cls, src_host, entries):
        return [cls.arp_req(src_host, e) for e in entries]

    @classmethod
    def garp_req(cls, host):
        return cls.arp_req(host, host)

    @classmethod
    def garp_reqs(cls, entries):
        return [cls.garp_req(e) for e in entries]

    def arp_resp_host(self, src_host, arp_resp):
        ether = arp_resp[Ether]
        self.assertEqual(ether.dst, src_host.mac)

        arp = arp_resp[ARP]
        self.assertEqual(arp.hwtype, 1)
        self.assertEqual(arp.ptype, 0x800)
        self.assertEqual(arp.hwlen, 6)
        self.assertEqual(arp.plen, 4)
        arp_opts = {"who-has": 1, "is-at": 2}
        self.assertEqual(arp.op, arp_opts["is-at"])
        self.assertEqual(arp.hwdst, src_host.mac)
        self.assertEqual(arp.pdst, src_host.ip4)
        return Host(mac=arp.hwsrc, ip4=arp.psrc)

    def arp_resp_hosts(self, src_host, pkts):
        return {self.arp_resp_host(src_host, p) for p in pkts}

    @staticmethod
    def inttoip4(ip):
        o1 = int(ip / 16777216) % 256
        o2 = int(ip / 65536) % 256
        o3 = int(ip / 256) % 256
        o4 = int(ip) % 256
        return "%s.%s.%s.%s" % (o1, o2, o3, o4)

    def arp_event_host(self, e):
        return Host(str(e.mac), ip4=str(e.ip))

    def arp_event_hosts(self, evs):
        return {self.arp_event_host(e) for e in evs}

    def nd_event_host(self, e):
        return Host(str(e.mac), ip6=str(e.ip))

    def nd_event_hosts(self, evs):
        return {self.nd_event_host(e) for e in evs}

    @classmethod
    def ns_req(cls, src_host, host):
        nsma = in6_getnsma(inet_pton(AF_INET6, "fd10::ffff"))
        d = inet_ntop(AF_INET6, nsma)
        return (
            Ether(dst="ff:ff:ff:ff:ff:ff", src=src_host.mac)
            / IPv6(dst=d, src=src_host.ip6)
            / ICMPv6ND_NS(tgt=host.ip6)
            / ICMPv6NDOptSrcLLAddr(lladdr=src_host.mac)
        )

    @classmethod
    def ns_reqs_dst(cls, entries, dst_host):
        return [cls.ns_req(e, dst_host) for e in entries]

    @classmethod
    def ns_reqs_src(cls, src_host, entries):
        return [cls.ns_req(src_host, e) for e in entries]

    def na_resp_host(self, src_host, rx):
        self.assertEqual(rx[Ether].dst, src_host.mac)
        self.assertEqual(in6_ptop(rx[IPv6].dst), in6_ptop(src_host.ip6))

        self.assertTrue(rx.haslayer(ICMPv6ND_NA))
        self.assertTrue(rx.haslayer(ICMPv6NDOptDstLLAddr))

        na = rx[ICMPv6ND_NA]
        return Host(mac=na.lladdr, ip6=na.tgt)

    def na_resp_hosts(self, src_host, pkts):
        return {self.na_resp_host(src_host, p) for p in pkts}

    def set_bd_flags(self, bd_id, **args):
        """
        Enable/disable defined feature(s) of the bridge domain.

        :param int bd_id: Bridge domain ID.
        :param list args: List of feature/status pairs. Allowed features: \
        learn, forward, flood, uu_flood and arp_term. Status False means \
        disable, status True means enable the feature.
        :raise: ValueError in case of unknown feature in the input.
        """
        for flag in args:
            if flag == "learn":
                feature_bitmap = 1 << 0
            elif flag == "forward":
                feature_bitmap = 1 << 1
            elif flag == "flood":
                feature_bitmap = 1 << 2
            elif flag == "uu_flood":
                feature_bitmap = 1 << 3
            elif flag == "arp_term":
                feature_bitmap = 1 << 4
            else:
                raise ValueError("Unknown feature used: %s" % flag)
            is_set = 1 if args[flag] else 0
            self.vapi.bridge_flags(bd_id=bd_id, is_set=is_set, flags=feature_bitmap)
        self.logger.info("Bridge domain ID %d updated" % bd_id)

    def verify_arp(self, src_host, req_hosts, resp_hosts, bd_id=1):
        reqs = self.arp_reqs(src_host, req_hosts)

        for swif in self.bd_swifs(bd_id):
            swif.add_stream(reqs)

        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()

        for swif in self.bd_swifs(bd_id):
            resp_pkts = swif.get_capture(len(resp_hosts))
            resps = self.arp_resp_hosts(src_host, resp_pkts)
            self.assertEqual(len(resps ^ resp_hosts), 0)

    def verify_nd(self, src_host, req_hosts, resp_hosts, bd_id=1):
        reqs = self.ns_reqs_src(src_host, req_hosts)

        for swif in self.bd_swifs(bd_id):
            swif.add_stream(reqs)

        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()

        for swif in self.bd_swifs(bd_id):
            resp_pkts = swif.get_capture(len(resp_hosts))
            resps = self.na_resp_hosts(src_host, resp_pkts)
            self.assertEqual(len(resps ^ resp_hosts), 0)

    def test_l2bd_arp_term_01(self):
        """L2BD arp term - add 5 hosts, verify arp responses"""
        src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
        self.bd_add_del(1, is_add=1)
        self.set_bd_flags(1, arp_term=True, flood=False, uu_flood=False, learn=False)
        macs = self.mac_list(range(1, 5))
        hosts = self.ip4_hosts(4, 1, macs)
        self.add_del_arp_term_hosts(hosts, is_add=1)

        self.verify_arp(src_host, hosts, hosts)
        type(self).hosts = hosts

    def test_l2bd_arp_term_02(self):
        """L2BD arp term - delete 3 hosts, verify arp responses"""
        src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
        macs = self.mac_list(range(1, 3))
        deleted = self.ip4_hosts(4, 1, macs)
        self.add_del_arp_term_hosts(deleted, is_add=0)
        remaining = self.hosts - deleted
        self.verify_arp(src_host, self.hosts, remaining)
        type(self).hosts = remaining
        self.bd_add_del(1, is_add=0)

    def test_l2bd_arp_term_03(self):
        """L2BD arp term - recreate BD1, readd 3 hosts, verify arp responses"""
        src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
        self.bd_add_del(1, is_add=1)
        self.set_bd_flags(1, arp_term=True, flood=False, uu_flood=False, learn=False)
        macs = self.mac_list(range(1, 3))
        readded = self.ip4_hosts(4, 1, macs)
        self.add_del_arp_term_hosts(readded, is_add=1)
        self.verify_arp(src_host, self.hosts | readded, readded)
        type(self).hosts = readded

    def test_l2bd_arp_term_04(self):
        """L2BD arp term - 2 IP4 addrs per host"""
        src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
        macs = self.mac_list(range(1, 3))
        sub5_hosts = self.ip4_hosts(5, 1, macs)
        self.add_del_arp_term_hosts(sub5_hosts, is_add=1)
        hosts = self.hosts | sub5_hosts
        self.verify_arp(src_host, hosts, hosts)
        type(self).hosts = hosts
        self.bd_add_del(1, is_add=0)

    def test_l2bd_arp_term_05(self):
        """L2BD arp term - create and update 10 IP4-mac pairs"""
        src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
        self.bd_add_del(1, is_add=1)
        self.set_bd_flags(1, arp_term=True, flood=False, uu_flood=False, learn=False)
        macs1 = self.mac_list(range(10, 20))
        hosts1 = self.ip4_hosts(5, 1, macs1)
        self.add_del_arp_term_hosts(hosts1, is_add=1)
        self.verify_arp(src_host, hosts1, hosts1)
        macs2 = self.mac_list(range(20, 30))
        hosts2 = self.ip4_hosts(5, 1, macs2)
        self.add_del_arp_term_hosts(hosts2, is_add=1)
        self.verify_arp(src_host, hosts1, hosts2)
        self.bd_add_del(1, is_add=0)

    def test_l2bd_arp_term_06(self):
        """L2BD arp/ND term - hosts with both ip4/ip6"""
        src_host4 = self.ip4_host(50, 50, "00:00:11:22:33:44")
        src_host6 = self.ip6_host(50, 50, "00:00:11:22:33:44")
        self.bd_add_del(1, is_add=1)
        # enable flood to make sure requests are not flooded
        self.set_bd_flags(1, arp_term=True, flood=True, uu_flood=False, learn=False)
        macs = self.mac_list(range(10, 20))
        hosts6 = self.ip6_hosts(5, 1, macs)
        hosts4 = self.ip4_hosts(5, 1, macs)
        self.add_del_arp_term_hosts(hosts4, is_add=1)
        self.add_del_arp_term_hosts(hosts6, is_add=1, is_ipv6=1)
        self.verify_arp(src_host4, hosts4, hosts4)
        self.verify_nd(src_host6, hosts6, hosts6)
        self.bd_add_del(1, is_add=0)

    def test_l2bd_arp_term_07(self):
        """L2BD ND term - Add and Del hosts, verify ND replies"""
        src_host6 = self.ip6_host(50, 50, "00:00:11:22:33:44")
        self.bd_add_del(1, is_add=1)
        self.set_bd_flags(1, arp_term=True, flood=False, uu_flood=False, learn=False)
        macs = self.mac_list(range(10, 20))
        hosts6 = self.ip6_hosts(5, 1, macs)
        self.add_del_arp_term_hosts(hosts6, is_add=1, is_ipv6=1)
        self.verify_nd(src_host6, hosts6, hosts6)
        del_macs = self.mac_list(range(10, 15))
        deleted = self.ip6_hosts(5, 1, del_macs)
        self.add_del_arp_term_hosts(deleted, is_add=0, is_ipv6=1)
        self.verify_nd(src_host6, hosts6, hosts6 - deleted)
        self.bd_add_del(1, is_add=0)

    def test_l2bd_arp_term_08(self):
        """L2BD ND term - Add and update IP+mac, verify ND replies"""
        src_host = self.ip6_host(50, 50, "00:00:11:22:33:44")
        self.bd_add_del(1, is_add=1)
        self.set_bd_flags(1, arp_term=True, flood=False, uu_flood=False, learn=False)
        macs1 = self.mac_list(range(10, 20))
        hosts = self.ip6_hosts(5, 1, macs1)
        self.add_del_arp_term_hosts(hosts, is_add=1, is_ipv6=1)
        self.verify_nd(src_host, hosts, hosts)
        macs2 = self.mac_list(range(20, 30))
        updated = self.ip6_hosts(5, 1, macs2)
        self.add_del_arp_term_hosts(updated, is_add=1, is_ipv6=1)
        self.verify_nd(src_host, hosts, updated)
        self.bd_add_del(1, is_add=0)

    def test_l2bd_arp_term_09(self):
        """L2BD arp term - send garps, verify arp event reports"""
        self.vapi.want_l2_arp_term_events(enable=1)
        self.bd_add_del(1, is_add=1)
        self.set_bd_flags(1, arp_term=True, flood=False, uu_flood=False, learn=False)
        macs = self.mac_list(range(90, 95))
        hosts = self.ip4_hosts(5, 1, macs)

        garps = self.garp_reqs(hosts)
        self.bd_swifs(1)[0].add_stream(garps)

        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        evs = [
            self.vapi.wait_for_event(1, "l2_arp_term_event") for i in range(len(hosts))
        ]
        ev_hosts = self.arp_event_hosts(evs)
        self.assertEqual(len(ev_hosts ^ hosts), 0)

    def test_l2bd_arp_term_10(self):
        """L2BD arp term - send duplicate garps, verify suppression"""
        macs = self.mac_list(range(70, 71))
        hosts = self.ip4_hosts(6, 1, macs)

        """ send the packet 5 times expect one event
        """
        garps = self.garp_reqs(hosts) * 5
        self.bd_swifs(1)[0].add_stream(garps)

        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        evs = [
            self.vapi.wait_for_event(1, "l2_arp_term_event") for i in range(len(hosts))
        ]
        ev_hosts = self.arp_event_hosts(evs)
        self.assertEqual(len(ev_hosts ^ hosts), 0)

    def test_l2bd_arp_term_11(self):
        """L2BD arp term - disable ip4 arp events,send garps, verify no events"""
        self.vapi.want_l2_arp_term_events(enable=0)
        macs = self.mac_list(range(90, 95))
        hosts = self.ip4_hosts(5, 1, macs)

        garps = self.garp_reqs(hosts)
        self.bd_swifs(1)[0].add_stream(garps)

        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        self.sleep(1)
        self.assertEqual(len(self.vapi.collect_events()), 0)
        self.bd_add_del(1, is_add=0)

    def test_l2bd_arp_term_12(self):
        """L2BD ND term - send NS packets verify reports"""
        self.vapi.want_l2_arp_term_events(enable=1)
        dst_host = self.ip6_host(50, 50, "00:00:11:22:33:44")
        self.bd_add_del(1, is_add=1)
        self.set_bd_flags(1, arp_term=True, flood=False, uu_flood=False, learn=False)
        macs = self.mac_list(range(10, 15))
        hosts = self.ip6_hosts(5, 1, macs)
        reqs = self.ns_reqs_dst(hosts, dst_host)
        self.bd_swifs(1)[0].add_stream(reqs)

        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        evs = [
            self.vapi.wait_for_event(2, "l2_arp_term_event") for i in range(len(hosts))
        ]
        ev_hosts = self.nd_event_hosts(evs)
        self.assertEqual(len(ev_hosts ^ hosts), 0)

    def test_l2bd_arp_term_13(self):
        """L2BD ND term - send duplicate ns, verify suppression"""
        dst_host = self.ip6_host(50, 50, "00:00:11:22:33:44")
        macs = self.mac_list(range(16, 17))
        hosts = self.ip6_hosts(5, 1, macs)
        reqs = self.ns_reqs_dst(hosts, dst_host) * 5
        self.bd_swifs(1)[0].add_stream(reqs)

        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        evs = [
            self.vapi.wait_for_event(2, "l2_arp_term_event") for i in range(len(hosts))
        ]
        ev_hosts = self.nd_event_hosts(evs)
        self.assertEqual(len(ev_hosts ^ hosts), 0)

    def test_l2bd_arp_term_14(self):
        """L2BD ND term - disable ip4 arp events,send ns, verify no events"""
        self.vapi.want_l2_arp_term_events(enable=0)
        dst_host = self.ip6_host(50, 50, "00:00:11:22:33:44")
        macs = self.mac_list(range(10, 15))
        hosts = self.ip6_hosts(5, 1, macs)
        reqs = self.ns_reqs_dst(hosts, dst_host)
        self.bd_swifs(1)[0].add_stream(reqs)

        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        self.sleep(1)
        self.assertEqual(len(self.vapi.collect_events()), 0)
        self.bd_add_del(1, is_add=0)


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