summaryrefslogtreecommitdiff
path: root/tests/test-rstp.c
blob: 96c611a3372121f9762bec4b3077ad42c0b2180b (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
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
#include <config.h>

#include "rstp-common.h"
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stdlib.h>
#include "ofpbuf.h"
#include "ovstest.h"
#include "packets.h"
#include "vlog.h"

#define MAX_PORTS 10

struct bpdu {
    int port_no;
    void *data;
    size_t size;
};

struct bridge {
    struct test_case *tc;
    int id;
    bool reached;

    struct rstp *rstp;

    struct lan *ports[RSTP_MAX_PORTS];
    int n_ports;
    int n_active_ports;

#define RXQ_SIZE 16
    struct bpdu rxq[RXQ_SIZE];
    int rxq_head, rxq_tail;
};

struct lan_conn {
    struct bridge *bridge;
    int port_no;
};

struct lan {
    struct test_case *tc;
    const char *name;
    bool reached;
    struct lan_conn conns[16];
    int n_conns;
};

struct test_case {
    struct bridge *bridges[16];
    int n_bridges;
    struct lan *lans[26];
    int n_lans;
};

static const char *file_name;
static int line_number;
static char line[128];
static char *pos, *token;
static int n_warnings;

static struct test_case *
new_test_case(void)
{
    struct test_case *tc = xmalloc(sizeof *tc);

    tc->n_bridges = 0;
    tc->n_lans = 0;
    return tc;
}

/* This callback is called with rstp_mutex held. */
static void
send_bpdu(struct ofpbuf *pkt, void *port_, void *b_)
    OVS_REQUIRES(rstp_mutex)
{
    struct bridge *b = b_;
    struct lan *lan;
    const struct rstp_port *port = port_;
    uint16_t port_no = port->port_number;

    assert(port_no < b->n_ports);
    lan = b->ports[port_no];
    if (lan) {
        const void *data = ofpbuf_l3(pkt);
        size_t size = (char *) ofpbuf_tail(pkt) - (char *) data;
        int i;

        for (i = 0; i < lan->n_conns; i++) {
            struct lan_conn *conn = &lan->conns[i];

            if (conn->bridge != b || conn->port_no != port_no) {
                struct bridge *dst = conn->bridge;
                struct bpdu *bpdu = &dst->rxq[dst->rxq_head++ % RXQ_SIZE];

                assert(dst->rxq_head - dst->rxq_tail <= RXQ_SIZE);
                bpdu->data = xmemdup(data, size);
                bpdu->size = size;
                bpdu->port_no = conn->port_no;
            }
        }
    }
    ofpbuf_delete(pkt);
}

static struct bridge *
new_bridge(struct test_case *tc, int id)
{
    struct bridge *b = xmalloc(sizeof *b);
    char name[16];
    struct rstp_port *p;
    int i;

    b->tc = tc;
    b->id = id;
    snprintf(name, sizeof name, "rstp%x", id);
    b->rstp = rstp_create(name, id, send_bpdu, b);
    for (i = 1; i < MAX_PORTS; i++) {
        p = rstp_add_port(b->rstp);
        rstp_port_set_aux(p, p);
        rstp_port_set_state(p, RSTP_DISABLED);
        rstp_port_set_mac_operational(p, true);
    }

    assert(tc->n_bridges < ARRAY_SIZE(tc->bridges));
    b->n_ports = 1;
    b->n_active_ports = 1;
    b->rxq_head = b->rxq_tail = 0;
    tc->bridges[tc->n_bridges++] = b;
    return b;
}

static struct lan *
new_lan(struct test_case *tc, const char *name)
{
    struct lan *lan = xmalloc(sizeof *lan);
    lan->tc = tc;
    lan->name = xstrdup(name);
    lan->n_conns = 0;
    assert(tc->n_lans < ARRAY_SIZE(tc->lans));
    tc->lans[tc->n_lans++] = lan;
    return lan;
}

static void
reconnect_port(struct bridge *b, int port_no, struct lan *new_lan)
{
    struct lan *old_lan;
    int j;

    assert(port_no < b->n_ports);
    old_lan = b->ports[port_no];
    if (old_lan == new_lan) {
        return;
    }

    /* Disconnect from old_lan. */
    if (old_lan) {
        for (j = 0; j < old_lan->n_conns; j++) {
            struct lan_conn *c = &old_lan->conns[j];

            if (c->bridge == b && c->port_no == port_no) {
                memmove(c, c + 1, sizeof *c * (old_lan->n_conns - j - 1));
                old_lan->n_conns--;
                break;
            }
        }
    }

    /* Connect to new_lan. */
    b->ports[port_no] = new_lan;
    if (new_lan) {
        int conn_no = new_lan->n_conns++;

        assert(conn_no < ARRAY_SIZE(new_lan->conns));
        new_lan->conns[conn_no].bridge = b;
        new_lan->conns[conn_no].port_no = port_no;
    }
}

static void
new_port(struct bridge *b, struct lan *lan, uint32_t path_cost)
{
    int port_no = b->n_ports++;
    struct rstp_port *p = rstp_get_port(b->rstp, port_no);

    assert(port_no < ARRAY_SIZE(b->ports));
    b->ports[port_no] = NULL;
    /* Enable port. */
    reinitialize_port(p);
    rstp_port_set_path_cost(p, path_cost);
    rstp_port_set_state(p, RSTP_DISCARDING);
    rstp_port_set_mac_operational(p, true);
    reconnect_port(b, port_no, lan);
}

static void
dump(struct test_case *tc)
{
    int i;

    for (i = 0; i < tc->n_bridges; i++) {
        struct bridge *b = tc->bridges[i];
        struct rstp *rstp = b->rstp;
        int j;

        printf("%s:", rstp_get_name(rstp));
        if (rstp_is_root_bridge(rstp)) {
            printf(" root");
        }
        printf("\n");
        for (j = 0; j < b->n_ports; j++) {
            struct rstp_port *p = rstp_get_port(rstp, j);
            enum rstp_state state = rstp_port_get_state(p);

            printf("\tport %d", j);
            if (b->ports[j]) {
                printf(" (lan %s)", b->ports[j]->name);
            } else {
                printf(" (disconnected)");
            }
            printf(": %s", rstp_state_name(state));
            if (p == rstp_get_root_port(rstp)) {
                printf(" (root port, root_path_cost=%u)",
                       rstp_get_root_path_cost(rstp));
            }
            printf("\n");
        }
    }
}

static void dump_lan_tree(struct test_case *, struct lan *, int level);

static void
dump_bridge_tree(struct test_case *tc, struct bridge *b, int level)
{
    int i;

    if (b->reached) {
        return;
    }
    b->reached = true;
    for (i = 0; i < level; i++) {
        printf("\t");
    }
    printf("%s\n", rstp_get_name(b->rstp));
    for (i = 0; i < b->n_ports; i++) {
        struct lan *lan = b->ports[i];
        struct rstp_port *p = rstp_get_port(b->rstp, i);

        if (rstp_port_get_state(p) == RSTP_FORWARDING && lan) {
            dump_lan_tree(tc, lan, level + 1);
        }
    }
}

static void
dump_lan_tree(struct test_case *tc, struct lan *lan, int level)
{
    int i;

    if (lan->reached) {
        return;
    }
    lan->reached = true;
    for (i = 0; i < level; i++) {
        printf("\t");
    }
    printf("%s\n", lan->name);
    for (i = 0; i < lan->n_conns; i++) {
        struct bridge *b = lan->conns[i].bridge;

        dump_bridge_tree(tc, b, level + 1);
    }
}

static void
tree(struct test_case *tc)
{
    int i;

    for (i = 0; i < tc->n_bridges; i++) {
        struct bridge *b = tc->bridges[i];

        b->reached = false;
    }
    for (i = 0; i < tc->n_lans; i++) {
        struct lan *lan = tc->lans[i];

        lan->reached = false;
    }
    for (i = 0; i < tc->n_bridges; i++) {
        struct bridge *b = tc->bridges[i];
        struct rstp *rstp = b->rstp;

        if (rstp_is_root_bridge(rstp)) {
            dump_bridge_tree(tc, b, 0);
        }
    }
}

static void
simulate(struct test_case *tc, int granularity)
{
    int time, i, round_trips;

    for (time = 0; time < 1000 * 180; time += granularity) {

        for (i = 0; i < tc->n_bridges; i++) {
            rstp_tick_timers(tc->bridges[i]->rstp);
        }
        for (round_trips = 0; round_trips < granularity; round_trips++) {
            bool any = false;

            for (i = 0; i < tc->n_bridges; i++) {
                struct bridge *b = tc->bridges[i];

                for (; b->rxq_tail != b->rxq_head; b->rxq_tail++) {
                    struct bpdu *bpdu = &b->rxq[b->rxq_tail % RXQ_SIZE];

                    rstp_port_received_bpdu(rstp_get_port(b->rstp,
                                                          bpdu->port_no),
                                            bpdu->data, bpdu->size);
                    free(bpdu->data);
                    any = true;
                }
            }
            if (!any) {
                break;
            }
        }
    }
}

NO_RETURN static void
err(const char *message, ...)
    PRINTF_FORMAT(1, 2);

static void
err(const char *message, ...)
{
    va_list args;

    fprintf(stderr, "%s:%d:%"PRIdPTR": ", file_name, line_number, pos - line);
    va_start(args, message);
    vfprintf(stderr, message, args);
    va_end(args);
    putc('\n', stderr);

    exit(EXIT_FAILURE);
}

static void
warn(const char *message, ...)
    PRINTF_FORMAT(1, 2);

static void
warn(const char *message, ...)
{
    va_list args;

    fprintf(stderr, "%s:%d: ", file_name, line_number);
    va_start(args, message);
    vfprintf(stderr, message, args);
    va_end(args);
    putc('\n', stderr);

    n_warnings++;
}

static bool
get_token(void)
{
    char *start;

    while (isspace((unsigned char) *pos)) {
        pos++;
    }
    if (*pos == '\0') {
        free(token);
        token = NULL;
        return false;
    }

    start = pos;
    if (isalpha((unsigned char) *pos)) {
        while (isalpha((unsigned char) *++pos)) {
            continue;
        }
    } else if (isdigit((unsigned char) *pos)) {
        if (*pos == '0' && (pos[1] == 'x' || pos[1] == 'X')) {
            pos += 2;
            while (isxdigit((unsigned char) *pos)) {
                pos++;
            }
        } else {
            while (isdigit((unsigned char) *++pos)) {
                continue;
            }
        }
    } else {
        pos++;
    }

    free(token);
    token = xmemdup0(start, pos - start);
    return true;
}

static bool
get_int(int *intp)
{
    char *save_pos = pos;

    if (token && isdigit((unsigned char) *token)) {
        *intp = strtol(token, NULL, 0);
        get_token();
        return true;
    } else {
        pos = save_pos;
        return false;
    }
}

static bool
match(const char *want)
{
    if (token && !strcmp(want, token)) {
        get_token();
        return true;
    } else {
        return false;
    }
}

static int
must_get_int(void)
{
    int x;

    if (!get_int(&x)) {
        err("expected integer");
    }
    return x;
}

static void
must_match(const char *want)
{
    if (!match(want)) {
        err("expected \"%s\"", want);
    }
}

static void
test_rstp_main(int argc, char *argv[])
{
    struct test_case *tc;
    FILE *input_file;
    int i;

    vlog_set_pattern(VLF_CONSOLE, "%c|%p|%m");
    vlog_set_levels(NULL, VLF_SYSLOG, VLL_OFF);

    if (argc != 2) {
        ovs_fatal(0, "usage: test-rstp INPUT.RSTP\n");
    }
    file_name = argv[1];

    input_file = fopen(file_name, "r");
    if (!input_file) {
        ovs_fatal(errno, "error opening \"%s\"", file_name);
    }

    tc = new_test_case();
    for (i = 0; i < 26; i++) {
        char name[2];

        name[0] = 'a' + i;
        name[1] = '\0';
        new_lan(tc, name);
    }

    for (line_number = 1; fgets(line, sizeof line, input_file);
         line_number++)
    {
        char *newline, *hash;

        newline = strchr(line, '\n');
        if (newline) {
            *newline = '\0';
        }
        hash = strchr(line, '#');
        if (hash) {
            *hash = '\0';
        }

        pos = line;
        if (!get_token()) {
            continue;
        }
        if (match("bridge")) {
            struct bridge *bridge;
            int bridge_no, port_no;

            bridge_no = must_get_int();
            if (bridge_no < tc->n_bridges) {
                bridge = tc->bridges[bridge_no];
            } else if (bridge_no == tc->n_bridges) {
                bridge = new_bridge(tc, must_get_int());
            } else {
                err("bridges must be numbered consecutively from 0");
            }
            if (match("^")) {
                rstp_set_bridge_priority(bridge->rstp, must_get_int());
            }
            if (match("=")) {
                for (port_no = 1; port_no < MAX_PORTS; port_no++) {
                    struct rstp_port *p = rstp_get_port(bridge->rstp, port_no);

                    if (!token || match("X")) {
                        /* Disable port. */
                        reinitialize_port(p);
                        rstp_port_set_state(p, RSTP_DISABLED);
                        rstp_port_set_mac_operational(p, false);
                    } else if (match("_")) {
                        /* Nothing to do. */
                    } else {
                        struct lan *lan;
                        uint32_t path_cost;

                        if (!strcmp(token, "0")) {
                            lan = NULL;
                        } else if (strlen(token) == 1
                                && islower((unsigned char)*token)) {
                            lan = tc->lans[*token - 'a'];
                        } else {
                            err("%s is not a valid LAN name "
                                "(0 or a lowercase letter)", token);
                        }
                        get_token();

                        path_cost = match(":") ? must_get_int() :
                                                 RSTP_DEFAULT_PORT_PATH_COST;
                        if (port_no < bridge->n_ports) {
                            /* Enable port. */
                            reinitialize_port(p);
                            rstp_port_set_path_cost(p, path_cost);
                            rstp_port_set_state(p, RSTP_DISCARDING);
                            rstp_port_set_mac_operational(p, true);
                            reconnect_port(bridge, port_no, lan);
                        } else if (port_no == bridge->n_ports) {
                            new_port(bridge, lan, path_cost);
                            bridge->n_active_ports++;
                        } else {
                            err("ports must be numbered consecutively");
                        }
                        if (match("^")) {
                            rstp_port_set_priority(p, must_get_int());
                        }
                    }
                }
            }
        } else if (match("run")) {
            simulate(tc, must_get_int());
        } else if (match("dump")) {
            dump(tc);
        } else if (match("tree")) {
            tree(tc);
        } else if (match("check")) {
            struct bridge *b;
            struct rstp *rstp;
            int bridge_no, port_no;
            uint32_t cost_value;

            bridge_no = must_get_int();
            if (bridge_no >= tc->n_bridges) {
                err("no bridge numbered %d", bridge_no);
            }
            b = tc->bridges[bridge_no];
            rstp = b->rstp;

            must_match("=");

            if (match("rootid")) {
                uint64_t rootid;

                must_match(":");
                rootid = must_get_int();
                if (match("^")) {
                    rootid |= (uint64_t) must_get_int() << 48;
                } else {
                    rootid |= UINT64_C(0x8000) << 48;
                }
                if (rstp_get_designated_root(rstp) != rootid) {
                    warn("%s: root "RSTP_ID_FMT", not %"PRIx64,
                         rstp_get_name(rstp),
                         RSTP_ID_ARGS(rstp_get_designated_root(rstp)),
                         rootid);
                }
            }
            cost_value = rstp_get_root_path_cost(rstp);
            if (match("root")) {
                if (cost_value != 0) {
                    warn("%s: root path cost of root is %d instead of 0 \n",
                         rstp_get_name(rstp), cost_value);
                }
                if (!rstp_is_root_bridge(rstp)) {
                    warn("%s: root is "RSTP_ID_FMT", not "RSTP_ID_FMT"",
                         rstp_get_name(rstp),
                         RSTP_ID_ARGS(rstp_get_designated_root(rstp)),
                         RSTP_ID_ARGS(rstp_get_bridge_id(rstp)));
                }
                for (port_no = 1; port_no < b->n_active_ports; port_no++) {
                    struct rstp_port *p = rstp_get_port(rstp, port_no);
                    enum rstp_state state = rstp_port_get_state(p);

                    if (state != RSTP_DISABLED && state != RSTP_FORWARDING) {
                        warn("%s: root port %d in state %s",
                             rstp_get_name(b->rstp), port_no,
                             rstp_state_name(state));
                    }
                }
            } else {
                for (port_no = 1; port_no < b->n_active_ports; port_no++) {
                    struct rstp_port *p = rstp_get_port(rstp, port_no);
                    enum rstp_state state;

                    if (token == NULL || match("D")) {
                        state = RSTP_DISABLED;
                    } else if (match("Di")) {
                        state = RSTP_DISCARDING;
                    } else if (match("Le")) {
                        state = RSTP_LEARNING;
                    } else if (match("F")) {
                        state = RSTP_FORWARDING;
                    } else if (match("_")) {
                        continue;
                    } else {
                        err("unknown port state %s", token);
                    }
                    if (rstp_port_get_state(p) != state) {
                        warn("%s port %d: state is %s but should be %s",
                             rstp_get_name(rstp), port_no,
                             rstp_state_name(rstp_port_get_state(p)),
                             rstp_state_name(state));
                    }
                    if (state == RSTP_FORWARDING) {
                        struct rstp_port *root_port = rstp_get_root_port(rstp);

                        if (match(":")) {
                            int root_path_cost = must_get_int();

                            if (p != root_port) {
                                warn("%s: port %d is not the root port",
                                     rstp_get_name(rstp), port_no);
                                if (!root_port) {
                                    warn("%s: (there is no root port)",
                                         rstp_get_name(rstp));
                                } else {
                                    warn("%s: (port %d is the root port)",
                                         rstp_get_name(rstp),
                                         rstp_port_get_number(root_port));
                                }
                            } else if (cost_value != root_path_cost) {
                                warn("%s: root path cost is %d, should be %d",
                                     rstp_get_name(rstp),
                                     cost_value,
                                     root_path_cost);
                            }
                        } else if (p == root_port) {
                            warn("%s: port %d is the root port but "
                                 "not expected to be",
                                 rstp_get_name(rstp), port_no);
                        }
                    }
                }
            }
            if (n_warnings) {
                printf("failing because of %d warnings\n", n_warnings);
                exit(EXIT_FAILURE);
            }
        }
        if (get_token()) {
            printf("failing because of errors\n");
            err("trailing garbage on line");
        }
    }
    free(token);

    for (i = 0; i < tc->n_lans; i++) {
        struct lan *lan = tc->lans[i];

        free(CONST_CAST(char *, lan->name));
        free(lan);
    }
    for (i = 0; i < tc->n_bridges; i++) {
        struct bridge *bridge = tc->bridges[i];
        int j;

        for (j = 1; j < MAX_PORTS; j++) {
            rstp_port_unref(rstp_get_port(bridge->rstp, j));
        }
        rstp_unref(bridge->rstp);
        free(bridge);
    }
    free(tc);
}

OVSTEST_REGISTER("test-rstp", test_rstp_main);