summaryrefslogtreecommitdiffstats
path: root/contrib/tcpdump/print-ospf6.c
blob: fb62b3968597f64103e65dc994ae873191ba0968 (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
/*
 * Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 * the University nor the names of its contributors may be used to endorse
 * or promote products derived from this software without specific prior
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
 */

#ifndef lint
static const char rcsid[] _U_ =
    "@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.15 2006-09-13 06:31:11 guy Exp $ (LBL)";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <tcpdump-stdinc.h>

#include <stdio.h>
#include <string.h>

#include "interface.h"
#include "addrtoname.h"
#include "extract.h"

#include "ospf.h"
#include "ospf6.h"

static const struct tok ospf6_option_values[] = {
	{ OSPF6_OPTION_V6,	"V6" },
	{ OSPF6_OPTION_E,	"External" },
	{ OSPF6_OPTION_MC,	"Multicast" },
	{ OSPF6_OPTION_N,	"NSSA" },
	{ OSPF6_OPTION_R,	"Router" },
	{ OSPF6_OPTION_DC,	"Demand Circuit" },
	{ 0,			NULL }
};

static const struct tok ospf6_rla_flag_values[] = {
	{ RLA_FLAG_B,		"ABR" },
	{ RLA_FLAG_E,		"External" },
	{ RLA_FLAG_V,		"Virtual-Link Endpoint" },
	{ RLA_FLAG_W,		"Wildcard Receiver" },
        { RLA_FLAG_N,           "NSSA Translator" },
	{ 0,			NULL }
};

static const struct tok ospf6_asla_flag_values[] = {
	{ ASLA_FLAG_EXTERNAL,	"External Type 2" },
	{ ASLA_FLAG_FWDADDR,	"Fforwarding" },
	{ ASLA_FLAG_ROUTETAG,	"Tag" },
	{ 0,			NULL }
};

static struct tok ospf6_type_values[] = {
	{ OSPF_TYPE_HELLO,	"Hello" },
	{ OSPF_TYPE_DD,		"Database Description" },
	{ OSPF_TYPE_LS_REQ,	"LS-Request" },
	{ OSPF_TYPE_LS_UPDATE,	"LS-Update" },
	{ OSPF_TYPE_LS_ACK,	"LS-Ack" },
	{ 0,			NULL }
};

static struct tok ospf6_lsa_values[] = {
	{ LS_TYPE_ROUTER,       "Router" },
	{ LS_TYPE_NETWORK,      "Network" },
	{ LS_TYPE_INTER_AP,     "Inter-Area Prefix" },
	{ LS_TYPE_INTER_AR,     "Inter-Area Router" },
	{ LS_TYPE_ASE,          "External" },
	{ LS_TYPE_GROUP,        "Multicast Group" },
	{ LS_TYPE_NSSA,         "NSSA" },
	{ LS_TYPE_LINK,         "Link" },
	{ LS_TYPE_INTRA_AP,     "Intra-Area Prefix" },
        { LS_TYPE_INTRA_ATE,    "Intra-Area TE" },
        { LS_TYPE_GRACE,        "Grace" },
	{ 0,			NULL }
};

static struct tok ospf6_ls_scope_values[] = {
	{ LS_SCOPE_LINKLOCAL,   "Link Local" },
	{ LS_SCOPE_AREA,        "Area Local" },
	{ LS_SCOPE_AS,          "Domain Wide" },
	{ 0,			NULL }
};

static struct tok ospf6_dd_flag_values[] = {
	{ OSPF6_DB_INIT,	"Init" },
	{ OSPF6_DB_MORE,	"More" },
	{ OSPF6_DB_MASTER,	"Master" },
	{ 0,			NULL }
};

static struct tok ospf6_lsa_prefix_option_values[] = {
        { LSA_PREFIX_OPT_NU, "No Unicast" },
        { LSA_PREFIX_OPT_LA, "Local address" },
        { LSA_PREFIX_OPT_MC, "Multicast" },
        { LSA_PREFIX_OPT_P, "Propagate" },
        { LSA_PREFIX_OPT_DN, "Down" },
	{ 0, NULL }
};

static char tstr[] = " [|ospf3]";

#ifdef WIN32
#define inline __inline
#endif /* WIN32 */

/* Forwards */
static void ospf6_print_ls_type(u_int, const rtrid_t *);
static int ospf6_print_lshdr(const struct lsa6_hdr *);
static int ospf6_print_lsa(const struct lsa6 *);
static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);


static void
ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid)
{
        printf("\n\t    %s LSA (%d), %s Scope%s, LSA-ID %s",
               tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
               ls_type & LS_TYPE_MASK,
               tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
               ls_type &0x8000 ? ", transitive" : "", /* U-bit */
               ipaddr_string(ls_stateid));
}

static int
ospf6_print_lshdr(register const struct lsa6_hdr *lshp)
{

	TCHECK(lshp->ls_type);
	TCHECK(lshp->ls_seq);

	printf("\n\t  Advertising Router %s, seq 0x%08x, age %us, length %u",
               ipaddr_string(&lshp->ls_router),
               EXTRACT_32BITS(&lshp->ls_seq),
               EXTRACT_16BITS(&lshp->ls_age),
               EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr));

	ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid);

	return (0);
trunc:
	return (1);
}

static int
ospf6_print_lsaprefix(const u_int8_t *tptr, u_int lsa_length)
{
	const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr;
	u_int wordlen;
	struct in6_addr prefix;

	if (lsa_length < sizeof (*lsapp) - 4)
		goto trunc;
	lsa_length -= sizeof (*lsapp) - 4;
	TCHECK2(*lsapp, sizeof (*lsapp) - 4);
	wordlen = (lsapp->lsa_p_len + 31) / 32;
	if (wordlen * 4 > sizeof(struct in6_addr)) {
		printf(" bogus prefixlen /%d", lsapp->lsa_p_len);
		goto trunc;
	}
	if (lsa_length < wordlen * 4)
		goto trunc;
	lsa_length -= wordlen * 4;
	TCHECK2(lsapp->lsa_p_prefix, wordlen * 4);
	memset(&prefix, 0, sizeof(prefix));
	memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
	printf("\n\t\t%s/%d", ip6addr_string(&prefix),
		lsapp->lsa_p_len);
        if (lsapp->lsa_p_opt) {
            printf(", Options [%s]",
                   bittok2str(ospf6_lsa_prefix_option_values,
                              "none", lsapp->lsa_p_opt));
        }
        printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric));
	return sizeof(*lsapp) - 4 + wordlen * 4;

trunc:
	return -1;
}


/*
 * Print a single link state advertisement.  If truncated return 1, else 0.
 */
static int
ospf6_print_lsa(register const struct lsa6 *lsap)
{
	register const struct rlalink6 *rlp;
#if 0
	register const struct tos_metric *tosp;
#endif
	register const rtrid_t *ap;
#if 0
	register const struct aslametric *almp;
	register const struct mcla *mcp;
#endif
	register const struct llsa *llsap;
	register const struct lsa6_prefix *lsapp;
#if 0
	register const u_int32_t *lp;
#endif
	register u_int prefixes;
	register int bytelen;
	register u_int length, lsa_length;
	u_int32_t flags32;
	const u_int8_t *tptr;

	if (ospf6_print_lshdr(&lsap->ls_hdr))
		return (1);
	TCHECK(lsap->ls_hdr.ls_length);
        length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length);

	/*
	 * The LSA length includes the length of the header;
	 * it must have a value that's at least that length.
	 * If it does, find the length of what follows the
	 * header.
	 */
        if (length < sizeof(struct lsa6_hdr))
        	return (1);
        lsa_length = length - sizeof(struct lsa6_hdr);
        tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr);

	switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
	case LS_TYPE_ROUTER | LS_SCOPE_AREA:
		if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options))
			return (1);
		lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options);
		TCHECK(lsap->lsa_un.un_rla.rla_options);
                printf("\n\t      Options [%s]",
                       bittok2str(ospf6_option_values, "none",
                                  EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)));
                printf(", RLA-Flags [%s]",
                       bittok2str(ospf6_rla_flag_values, "none",
                                  lsap->lsa_un.un_rla.rla_flags));

		rlp = lsap->lsa_un.un_rla.rla_link;
		while (lsa_length != 0) {
			if (lsa_length < sizeof (*rlp))
				return (1);
			lsa_length -= sizeof (*rlp);
			TCHECK(*rlp);
			switch (rlp->link_type) {

			case RLA_TYPE_VIRTUAL:
				printf("\n\t      Virtual Link: Neighbor Router-ID %s"
                                       "\n\t      Neighbor Interface-ID %s, Interface %s",
                                       ipaddr_string(&rlp->link_nrtid),
                                       ipaddr_string(&rlp->link_nifid),
                                       ipaddr_string(&rlp->link_ifid)); 
                                break;

			case RLA_TYPE_ROUTER:
				printf("\n\t      Neighbor Router-ID %s"
                                       "\n\t      Neighbor Interface-ID %s, Interface %s",
                                       ipaddr_string(&rlp->link_nrtid),
                                       ipaddr_string(&rlp->link_nifid),
                                       ipaddr_string(&rlp->link_ifid)); 
				break;

			case RLA_TYPE_TRANSIT:
				printf("\n\t      Neighbor Network-ID %s"
                                       "\n\t      Neighbor Interface-ID %s, Interface %s",
				    ipaddr_string(&rlp->link_nrtid),
				    ipaddr_string(&rlp->link_nifid),
				    ipaddr_string(&rlp->link_ifid));
				break;

			default:
				printf("\n\t      Unknown Router Links Type 0x%02x",
				    rlp->link_type);
				return (0);
			}
			printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric));
			rlp++;
		}
		break;

	case LS_TYPE_NETWORK | LS_SCOPE_AREA:
		if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options))
			return (1);
		lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options);
		TCHECK(lsap->lsa_un.un_nla.nla_options);
                printf("\n\t      Options [%s]",
                       bittok2str(ospf6_option_values, "none",
                                  EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)));

		printf("\n\t      Connected Routers:");
		ap = lsap->lsa_un.un_nla.nla_router;
		while (lsa_length != 0) {
			if (lsa_length < sizeof (*ap))
				return (1);
			lsa_length -= sizeof (*ap);
			TCHECK(*ap);
			printf("\n\t\t%s", ipaddr_string(ap));
			++ap;
		}
		break;

	case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
		if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
			return (1);
		lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
		TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
		printf(", metric %u",
			EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);

		tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
		while (lsa_length != 0) {
			bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
			if (bytelen < 0)
				goto trunc;
			lsa_length -= bytelen;
			tptr += bytelen;
		}
		break;

	case LS_TYPE_ASE | LS_SCOPE_AS:
		if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric))
			return (1);
		lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric);
		TCHECK(lsap->lsa_un.un_asla.asla_metric);
		flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
                printf("\n\t     Flags [%s]",
                       bittok2str(ospf6_asla_flag_values, "none", flags32));
		printf(" metric %u",
		       EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
		       ASLA_MASK_METRIC);

		tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix;
		lsapp = (struct lsa6_prefix *)tptr;
		bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
		if (bytelen < 0)
			goto trunc;
		lsa_length -= bytelen;
		tptr += bytelen;

		if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
			struct in6_addr *fwdaddr6;

			fwdaddr6 = (struct in6_addr *)tptr;
			if (lsa_length < sizeof (*fwdaddr6))
				return (1);
			lsa_length -= sizeof (*fwdaddr6);
			TCHECK(*fwdaddr6);
			printf(" forward %s",
			       ip6addr_string(fwdaddr6));
			tptr += sizeof(*fwdaddr6);
		}

		if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
			if (lsa_length < sizeof (u_int32_t))
				return (1);
			lsa_length -= sizeof (u_int32_t);
			TCHECK(*(u_int32_t *)tptr);
			printf(" tag %s",
			       ipaddr_string((u_int32_t *)tptr));
			tptr += sizeof(u_int32_t);
		}

		if (lsapp->lsa_p_metric) {
			if (lsa_length < sizeof (u_int32_t))
				return (1);
			lsa_length -= sizeof (u_int32_t);
			TCHECK(*(u_int32_t *)tptr);
			printf(" RefLSID: %s",
			       ipaddr_string((u_int32_t *)tptr));
			tptr += sizeof(u_int32_t);
		}
		break;

	case LS_TYPE_LINK:
		/* Link LSA */
		llsap = &lsap->lsa_un.un_llsa;
		if (lsa_length < sizeof (llsap->llsa_priandopt))
			return (1);
		lsa_length -= sizeof (llsap->llsa_priandopt);
		TCHECK(llsap->llsa_priandopt);
                printf("\n\t      Options [%s]",
                       bittok2str(ospf6_option_values, "none",
                                  EXTRACT_32BITS(&llsap->llsa_options)));

		if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix))
			return (1);
		lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix);
                prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix);
		printf("\n\t      Priority %d, Link-local address %s, Prefixes %d:",
                       llsap->llsa_priority,
                       ip6addr_string(&llsap->llsa_lladdr),
                       prefixes);

		tptr = (u_int8_t *)llsap->llsa_prefix;
		while (prefixes > 0) {
			bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
			if (bytelen < 0)
				goto trunc;
			prefixes--;
			lsa_length -= bytelen;
			tptr += bytelen;
		}
		break;

	case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
		/* Intra-Area-Prefix LSA */
		if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid))
			return (1);
		lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid);
		TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
		ospf6_print_ls_type(
			EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
			&lsap->lsa_un.un_intra_ap.intra_ap_lsid);

		if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix))
			return (1);
		lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
		TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
                prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
		printf("\n\t      Prefixes %d:", prefixes);

		tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
		while (prefixes > 0) {
			bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
			if (bytelen < 0)
				goto trunc;
			prefixes--;
			lsa_length -= bytelen;
			tptr += bytelen;
		}
		break;

        case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
                if (ospf_print_grace_lsa(tptr, lsa_length) == -1) {
                    return 1;
                }
                break;

        case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
                if (ospf_print_te_lsa(tptr, lsa_length) == -1) {
                    return 1;
                }
                break;

	default:
                if(!print_unknown_data(tptr,
                                       "\n\t      ",
                                       lsa_length)) {
                    return (1);
                }
                break;
	}

	return (0);
trunc:
	return (1);
}

static int
ospf6_decode_v3(register const struct ospf6hdr *op,
    register const u_char *dataend)
{
	register const rtrid_t *ap;
	register const struct lsr6 *lsrp;
	register const struct lsa6_hdr *lshp;
	register const struct lsa6 *lsap;
	register int i;

	switch (op->ospf6_type) {

	case OSPF_TYPE_HELLO:
                printf("\n\tOptions [%s]",
                       bittok2str(ospf6_option_values, "none",
                                  EXTRACT_32BITS(&op->ospf6_hello.hello_options)));

                TCHECK(op->ospf6_hello.hello_deadint);
                printf("\n\t  Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
                       EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
                       EXTRACT_16BITS(&op->ospf6_hello.hello_deadint),
                       ipaddr_string(&op->ospf6_hello.hello_ifid),
                       op->ospf6_hello.hello_priority);

		TCHECK(op->ospf6_hello.hello_dr);
		if (op->ospf6_hello.hello_dr != 0)
			printf("\n\t  Designated Router %s",
			    ipaddr_string(&op->ospf6_hello.hello_dr));
		TCHECK(op->ospf6_hello.hello_bdr);
		if (op->ospf6_hello.hello_bdr != 0)
			printf(", Backup Designated Router %s",
			    ipaddr_string(&op->ospf6_hello.hello_bdr));
		if (vflag) {
			printf("\n\t  Neighbor List:");
			ap = op->ospf6_hello.hello_neighbor;
			while ((u_char *)ap < dataend) {
				TCHECK(*ap);
				printf("\n\t    %s", ipaddr_string(ap));
				++ap;
			}
		}
		break;	/* HELLO */

	case OSPF_TYPE_DD:
		TCHECK(op->ospf6_db.db_options);
                printf("\n\tOptions [%s]",
                       bittok2str(ospf6_option_values, "none",
                                  EXTRACT_32BITS(&op->ospf6_db.db_options)));
		TCHECK(op->ospf6_db.db_flags);
                printf(", DD Flags [%s]",
                       bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags));

		TCHECK(op->ospf6_db.db_seq);
		printf(", MTU %u, DD-Sequence 0x%08x",
                       EXTRACT_16BITS(&op->ospf6_db.db_mtu),
                       EXTRACT_32BITS(&op->ospf6_db.db_seq));

                /* Print all the LS adv's */
                lshp = op->ospf6_db.db_lshdr;
                while (!ospf6_print_lshdr(lshp)) {
                    ++lshp;
                }
		break;

	case OSPF_TYPE_LS_REQ:
		if (vflag) {
			lsrp = op->ospf6_lsr;
			while ((u_char *)lsrp < dataend) {
				TCHECK(*lsrp);
                                printf("\n\t  Advertising Router %s",
                                       ipaddr_string(&lsrp->ls_router));
				ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
                                                    &lsrp->ls_stateid);
				++lsrp;
			}
		}
		break;

	case OSPF_TYPE_LS_UPDATE:
		if (vflag) {
			lsap = op->ospf6_lsu.lsu_lsa;
			TCHECK(op->ospf6_lsu.lsu_count);
			i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
			while (i--) {
				if (ospf6_print_lsa(lsap))
					goto trunc;
				lsap = (struct lsa6 *)((u_char *)lsap +
				    EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
			}
		}
		break;


	case OSPF_TYPE_LS_ACK:
		if (vflag) {
			lshp = op->ospf6_lsa.lsa_lshdr;

			while (!ospf6_print_lshdr(lshp)) {
				++lshp;
			}
		}
		break;

	default:
		break;
	}
	return (0);
trunc:
	return (1);
}

void
ospf6_print(register const u_char *bp, register u_int length)
{
	register const struct ospf6hdr *op;
	register const u_char *dataend;
	register const char *cp;

	op = (struct ospf6hdr *)bp;

	/* If the type is valid translate it, or just print the type */
	/* value.  If it's not valid, say so and return */
	TCHECK(op->ospf6_type);
	cp = tok2str(ospf6_type_values, "unknown LS-type", op->ospf6_type);
	printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length);
	if (*cp == 'u') {
		return;
        }

        if(!vflag) { /* non verbose - so lets bail out here */
                return;
        }

	TCHECK(op->ospf6_len);
	if (length != EXTRACT_16BITS(&op->ospf6_len)) {
		printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
		return;
	}
	dataend = bp + length;

	/* Print the routerid if it is not the same as the source */
	TCHECK(op->ospf6_routerid);
	printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid));

	TCHECK(op->ospf6_areaid);
	if (op->ospf6_areaid != 0)
		printf(", Area %s", ipaddr_string(&op->ospf6_areaid));
	else
		printf(", Backbone Area");
	TCHECK(op->ospf6_instanceid);
	if (op->ospf6_instanceid)
		printf(", Instance %u", op->ospf6_instanceid);

	/* Do rest according to version.	 */
	switch (op->ospf6_version) {

	case 3:
		/* ospf version 3 */
		if (ospf6_decode_v3(op, dataend))
			goto trunc;
		break;

	default:
		printf(" ospf [version %d]", op->ospf6_version);
		break;
	}			/* end switch on version */

	return;
trunc:
	fputs(tstr, stdout);
}
OpenPOWER on IntegriCloud