xref: /freebsd/contrib/tcpdump/print-ospf6.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*
2  * Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that: (1) source code distributions
7  * retain the above copyright notice and this paragraph in its entirety, (2)
8  * distributions including binary code include the above copyright notice and
9  * this paragraph in its entirety in the documentation or other materials
10  * provided with the distribution, and (3) all advertising materials mentioning
11  * features or use of this software display the following acknowledgement:
12  * ``This product includes software developed by the University of California,
13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14  * the University nor the names of its contributors may be used to endorse
15  * or promote products derived from this software without specific prior
16  * written permission.
17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20  *
21  * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
22  */
23 
24 #ifndef lint
25 static const char rcsid[] _U_ =
26     "@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.13 2003/11/16 09:36:31 guy Exp $ (LBL)";
27 #endif
28 
29 #ifdef HAVE_CONFIG_H
30 #include "config.h"
31 #endif
32 
33 #include <tcpdump-stdinc.h>
34 
35 #include <stdio.h>
36 #include <string.h>
37 
38 #include "interface.h"
39 #include "addrtoname.h"
40 #include "extract.h"
41 
42 #include "ospf6.h"
43 
44 struct bits {
45 	u_int32_t bit;
46 	const char *str;
47 };
48 
49 static const struct bits ospf6_option_bits[] = {
50 	{ OSPF6_OPTION_V6,	"V6" },
51 	{ OSPF6_OPTION_E,	"E" },
52 	{ OSPF6_OPTION_MC,	"MC" },
53 	{ OSPF6_OPTION_N,	"N" },
54 	{ OSPF6_OPTION_R,	"R" },
55 	{ OSPF6_OPTION_DC,	"DC" },
56 	{ 0,			NULL }
57 };
58 
59 static const struct bits ospf6_rla_flag_bits[] = {
60 	{ RLA_FLAG_B,		"B" },
61 	{ RLA_FLAG_E,		"E" },
62 	{ RLA_FLAG_V,		"V" },
63 	{ RLA_FLAG_W,		"W" },
64 	{ 0,			NULL }
65 };
66 
67 static const struct bits ospf6_asla_flag_bits[] = {
68 	{ ASLA_FLAG_EXTERNAL,	"E" },
69 	{ ASLA_FLAG_FWDADDR,	"F" },
70 	{ ASLA_FLAG_ROUTETAG,	"T" },
71 	{ 0,			NULL }
72 };
73 
74 static struct tok type2str[] = {
75 	{ OSPF_TYPE_UMD,	"umd" },
76 	{ OSPF_TYPE_HELLO,	"hello" },
77 	{ OSPF_TYPE_DB,		"dd" },
78 	{ OSPF_TYPE_LSR,	"ls_req" },
79 	{ OSPF_TYPE_LSU,	"ls_upd" },
80 	{ OSPF_TYPE_LSA,	"ls_ack" },
81 	{ 0,			NULL }
82 };
83 
84 static char tstr[] = " [|ospf]";
85 
86 #ifdef WIN32
87 #define inline __inline
88 #endif /* WIN32 */
89 
90 /* Forwards */
91 static inline void ospf6_print_seqage(u_int32_t, time_t);
92 static inline void ospf6_print_bits(const struct bits *, u_char);
93 static void ospf6_print_ls_type(u_int, const rtrid_t *,
94     const rtrid_t *, const char *);
95 static int ospf6_print_lshdr(const struct lsa_hdr *);
96 static int ospf6_print_lsa(const struct lsa *);
97 static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
98 
99 static inline void
100 ospf6_print_seqage(register u_int32_t seq, register time_t us)
101 {
102 	register time_t sec = us % 60;
103 	register time_t mins = (us / 60) % 60;
104 	register time_t hour = us / 3600;
105 
106 	printf(" S %X age ", seq);
107 	if (hour)
108 		printf("%u:%02u:%02u",
109 		    (u_int32_t) hour, (u_int32_t) mins, (u_int32_t) sec);
110 	else if (mins)
111 		printf("%u:%02u", (u_int32_t) mins, (u_int32_t) sec);
112 	else
113 		printf("%u", (u_int32_t) sec);
114 }
115 
116 
117 static inline void
118 ospf6_print_bits(register const struct bits *bp, register u_char options)
119 {
120 	register char sep = ' ';
121 
122 	do {
123 		if (options & bp->bit) {
124 			printf("%c%s", sep, bp->str);
125 			sep = '/';
126 		}
127 	} while ((++bp)->bit);
128 }
129 
130 static void
131 ospf6_print_ls_type(register u_int ls_type,
132     register const rtrid_t *ls_stateid,
133     register const rtrid_t *ls_router, register const char *fmt)
134 {
135 	const char *scope;
136 
137 	switch (ls_type & LS_SCOPE_MASK) {
138 	case LS_SCOPE_LINKLOCAL:
139 		scope = "linklocal-";
140 		break;
141 	case LS_SCOPE_AREA:
142 		scope = "area-";
143 		break;
144 	case LS_SCOPE_AS:
145 		scope = "AS-";
146 		break;
147 	default:
148 		scope = "";
149 		break;
150 	}
151 
152 	switch (ls_type & LS_TYPE_MASK) {
153 	case LS_TYPE_ROUTER:
154 		printf(" %srtr %s", scope, ipaddr_string(ls_router));
155 		break;
156 
157 	case LS_TYPE_NETWORK:
158 		printf(" %snet dr %s if %s", scope,
159 		    ipaddr_string(ls_router),
160 		    ipaddr_string(ls_stateid));
161 		break;
162 
163 	case LS_TYPE_INTER_AP:
164 		printf(" %sinter-area-prefix %s abr %s", scope,
165 		    ipaddr_string(ls_stateid),
166 		    ipaddr_string(ls_router));
167 		break;
168 
169 	case LS_TYPE_INTER_AR:
170 		printf(" %sinter-area-router %s rtr %s", scope,
171 		    ipaddr_string(ls_router),
172 		    ipaddr_string(ls_stateid));
173 		break;
174 
175 	case LS_TYPE_ASE:
176 		printf(" %sase %s asbr %s", scope,
177 		    ipaddr_string(ls_stateid),
178 		    ipaddr_string(ls_router));
179 		break;
180 
181 	case LS_TYPE_GROUP:
182 		printf(" %sgroup %s rtr %s", scope,
183 		    ipaddr_string(ls_stateid),
184 		    ipaddr_string(ls_router));
185 		break;
186 
187 	case LS_TYPE_TYPE7:
188 		printf(" %stype7 %s rtr %s", scope,
189 		    ipaddr_string(ls_stateid),
190 		    ipaddr_string(ls_router));
191 		break;
192 
193 	case LS_TYPE_LINK:
194 		printf(" %slink %s rtr %s", scope,
195 		    ipaddr_string(ls_stateid),
196 		    ipaddr_string(ls_router));
197 		break;
198 
199 	case LS_TYPE_INTRA_AP:
200 		printf(" %sintra-area-prefix %s rtr %s", scope,
201 		    ipaddr_string(ls_stateid),
202 		    ipaddr_string(ls_router));
203 		break;
204 
205 	default:
206 		printf(" %s", scope);
207 		printf(fmt, ls_type);
208 		break;
209 	}
210 
211 }
212 
213 static int
214 ospf6_print_lshdr(register const struct lsa_hdr *lshp)
215 {
216 
217 	TCHECK(lshp->ls_type);
218 	printf(" {");						/* } (ctags) */
219 
220 	TCHECK(lshp->ls_seq);
221 	ospf6_print_seqage(EXTRACT_32BITS(&lshp->ls_seq), EXTRACT_16BITS(&lshp->ls_age));
222 	ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid,
223 		&lshp->ls_router, "ls_type %d");
224 
225 	return (0);
226 trunc:
227 	return (1);
228 }
229 
230 static int
231 ospf6_print_lsaprefix(register const struct lsa_prefix *lsapp)
232 {
233 	u_int k;
234 	struct in6_addr prefix;
235 
236 	TCHECK(*lsapp);
237 	k = (lsapp->lsa_p_len + 31) / 32;
238 	if (k * 4 > sizeof(struct in6_addr)) {
239 		printf("??prefixlen %d??", lsapp->lsa_p_len);
240 		goto trunc;
241 	}
242 	memset(&prefix, 0, sizeof(prefix));
243 	memcpy(&prefix, lsapp->lsa_p_prefix, k * 4);
244 	printf(" %s/%d", ip6addr_string(&prefix),
245 		lsapp->lsa_p_len);
246 	if (lsapp->lsa_p_opt)
247 		printf("(opt=%x)", lsapp->lsa_p_opt);
248 	if (lsapp->lsa_p_mbz)
249 		printf("(mbz=%x)", EXTRACT_16BITS(&lsapp->lsa_p_mbz)); /* XXX */
250 	return sizeof(*lsapp) - 4 + k * 4;
251 
252 trunc:
253 	return -1;
254 }
255 
256 
257 /*
258  * Print a single link state advertisement.  If truncated return 1, else 0.
259  */
260 static int
261 ospf6_print_lsa(register const struct lsa *lsap)
262 {
263 	register const u_char *ls_end, *ls_opt;
264 	register const struct rlalink *rlp;
265 #if 0
266 	register const struct tos_metric *tosp;
267 #endif
268 	register const rtrid_t *ap;
269 #if 0
270 	register const struct aslametric *almp;
271 	register const struct mcla *mcp;
272 #endif
273 	register const struct llsa *llsap;
274 	register const struct lsa_prefix *lsapp;
275 #if 0
276 	register const u_int32_t *lp;
277 #endif
278 	register u_int j;
279 	register int k;
280 	u_int32_t flags32;
281 
282 	if (ospf6_print_lshdr(&lsap->ls_hdr))
283 		return (1);
284 	TCHECK(lsap->ls_hdr.ls_length);
285 	ls_end = (u_char *)lsap + EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
286 	switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
287 	case LS_TYPE_ROUTER | LS_SCOPE_AREA:
288 		TCHECK(lsap->lsa_un.un_rla.rla_flags);
289 		ospf6_print_bits(ospf6_rla_flag_bits,
290 			lsap->lsa_un.un_rla.rla_flags);
291 		TCHECK(lsap->lsa_un.un_rla.rla_options);
292 		ospf6_print_bits(ospf6_option_bits,
293 			EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options));
294 
295 		TCHECK(lsap->lsa_un.un_rla.rla_link);
296 		rlp = lsap->lsa_un.un_rla.rla_link;
297 		while (rlp + sizeof(*rlp) <= (struct rlalink *)ls_end) {
298 			TCHECK(*rlp);
299 			printf(" {");				/* } (ctags) */
300 			switch (rlp->link_type) {
301 
302 			case RLA_TYPE_VIRTUAL:
303 				printf(" virt");
304 				/* Fall through */
305 
306 			case RLA_TYPE_ROUTER:
307 				printf(" nbrid %s nbrif %s if %s",
308 				    ipaddr_string(&rlp->link_nrtid),
309 				    ipaddr_string(&rlp->link_nifid),
310 				    ipaddr_string(&rlp->link_ifid));
311 				break;
312 
313 			case RLA_TYPE_TRANSIT:
314 				printf(" dr %s drif %s if %s",
315 				    ipaddr_string(&rlp->link_nrtid),
316 				    ipaddr_string(&rlp->link_nifid),
317 				    ipaddr_string(&rlp->link_ifid));
318 				break;
319 
320 			default:
321 								/* { (ctags) */
322 				printf(" ??RouterLinksType 0x%02x?? }",
323 				    rlp->link_type);
324 				return (0);
325 			}
326 			printf(" metric %d", EXTRACT_16BITS(&rlp->link_metric));
327 								/* { (ctags) */
328 			printf(" }");
329 			rlp++;
330 		}
331 		break;
332 
333 	case LS_TYPE_NETWORK | LS_SCOPE_AREA:
334 		TCHECK(lsap->lsa_un.un_nla.nla_options);
335 		ospf6_print_bits(ospf6_option_bits,
336 			EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options));
337 		printf(" rtrs");
338 		ap = lsap->lsa_un.un_nla.nla_router;
339 		while ((u_char *)ap < ls_end) {
340 			TCHECK(*ap);
341 			printf(" %s", ipaddr_string(ap));
342 			++ap;
343 		}
344 		break;
345 
346 	case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
347 		TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
348 		printf(" metric %u",
349 			EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
350 		lsapp = lsap->lsa_un.un_inter_ap.inter_ap_prefix;
351 		while (lsapp + sizeof(lsapp) <= (struct lsa_prefix *)ls_end) {
352 			k = ospf6_print_lsaprefix(lsapp);
353 			if (k)
354 				goto trunc;
355 			lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
356 		}
357 		break;
358 	case LS_SCOPE_AS | LS_TYPE_ASE:
359 		TCHECK(lsap->lsa_un.un_asla.asla_metric);
360 		flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
361 		ospf6_print_bits(ospf6_asla_flag_bits, flags32);
362 		printf(" metric %u",
363 		       EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
364 		       ASLA_MASK_METRIC);
365 		lsapp = lsap->lsa_un.un_asla.asla_prefix;
366 		k = ospf6_print_lsaprefix(lsapp);
367 		if (k < 0)
368 			goto trunc;
369 		if ((ls_opt = (u_char *)(((u_char *)lsapp) + k)) < ls_end) {
370 			struct in6_addr *fwdaddr6;
371 
372 			if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
373 				fwdaddr6 = (struct in6_addr *)ls_opt;
374 				TCHECK(*fwdaddr6);
375 				printf(" forward %s",
376 				       ip6addr_string(fwdaddr6));
377 
378 				ls_opt += sizeof(struct in6_addr);
379 			}
380 
381 			if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
382 				TCHECK(*(u_int32_t *)ls_opt);
383 				printf(" tag %s",
384 				       ipaddr_string((u_int32_t *)ls_opt));
385 
386 				ls_opt += sizeof(u_int32_t);
387 			}
388 
389 			if (lsapp->lsa_p_mbz) {
390 				TCHECK(*(u_int32_t *)ls_opt);
391 				printf(" RefLSID: %s",
392 				       ipaddr_string((u_int32_t *)ls_opt));
393 
394 				ls_opt += sizeof(u_int32_t);
395 			}
396 		}
397 		break;
398 #if 0
399 	case LS_TYPE_SUM_ABR:
400 		TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
401 		lp = lsap->lsa_un.un_sla.sla_tosmetric;
402 		while ((u_char *)lp < ls_end) {
403 			register u_int32_t ul;
404 
405 			TCHECK(*lp);
406 			ul = EXTRACT_32BITS(lp);
407 			printf(" tos %d metric %d",
408 			    (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
409 			    ul & SLA_MASK_METRIC);
410 			++lp;
411 		}
412 		break;
413 
414 	case LS_TYPE_GROUP:
415 		/* Multicast extensions as of 23 July 1991 */
416 		mcp = lsap->lsa_un.un_mcla;
417 		while ((u_char *)mcp < ls_end) {
418 			TCHECK(mcp->mcla_vid);
419 			switch (EXTRACT_32BITS(&mcp->mcla_vtype)) {
420 
421 			case MCLA_VERTEX_ROUTER:
422 				printf(" rtr rtrid %s",
423 				    ipaddr_string(&mcp->mcla_vid));
424 				break;
425 
426 			case MCLA_VERTEX_NETWORK:
427 				printf(" net dr %s",
428 				    ipaddr_string(&mcp->mcla_vid));
429 				break;
430 
431 			default:
432 				printf(" ??VertexType %u??",
433 				    EXTRACT_32BITS(&mcp->mcla_vtype));
434 				break;
435 			}
436 		++mcp;
437 		}
438 #endif
439 
440 	case LS_TYPE_LINK:
441 		/* Link LSA */
442 		llsap = &lsap->lsa_un.un_llsa;
443 		TCHECK(llsap->llsa_options);
444 		ospf6_print_bits(ospf6_option_bits, EXTRACT_32BITS(&llsap->llsa_options));
445 		TCHECK(llsap->llsa_nprefix);
446 		printf(" pri %d lladdr %s npref %d", llsap->llsa_priority,
447 			ip6addr_string(&llsap->llsa_lladdr),
448 			EXTRACT_32BITS(&llsap->llsa_nprefix));
449 		lsapp = llsap->llsa_prefix;
450 		for (j = 0; j < EXTRACT_32BITS(&llsap->llsa_nprefix); j++) {
451 			k = ospf6_print_lsaprefix(lsapp);
452 			if (k)
453 				goto trunc;
454 			lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
455 		}
456 		break;
457 
458 	case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
459 		/* Intra-Area-Prefix LSA */
460 		TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
461 		ospf6_print_ls_type(
462 			EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
463 			&lsap->lsa_un.un_intra_ap.intra_ap_lsid,
464 			&lsap->lsa_un.un_intra_ap.intra_ap_rtid,
465 			"LinkStateType %d");
466 		TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
467 		printf(" npref %d",
468 			EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix));
469 
470 		lsapp = lsap->lsa_un.un_intra_ap.intra_ap_prefix;
471 		for (j = 0;
472 		     j < EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
473 		     j++) {
474 			k = ospf6_print_lsaprefix(lsapp);
475 			if (k)
476 				goto trunc;
477 			lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
478 		}
479 		break;
480 
481 	default:
482 		printf(" ??LinkStateType 0x%04x??",
483 			EXTRACT_16BITS(&lsap->ls_hdr.ls_type));
484 	}
485 
486 								/* { (ctags) */
487 	fputs(" }", stdout);
488 	return (0);
489 trunc:
490 	fputs(" }", stdout);
491 	return (1);
492 }
493 
494 static int
495 ospf6_decode_v3(register const struct ospf6hdr *op,
496     register const u_char *dataend)
497 {
498 	register const rtrid_t *ap;
499 	register const struct lsr *lsrp;
500 	register const struct lsa_hdr *lshp;
501 	register const struct lsa *lsap;
502 	register char sep;
503 	register int i;
504 
505 	switch (op->ospf6_type) {
506 
507 	case OSPF_TYPE_UMD:
508 		/*
509 		 * Rob Coltun's special monitoring packets;
510 		 * do nothing
511 		 */
512 		break;
513 
514 	case OSPF_TYPE_HELLO:
515 		if (vflag) {
516 			TCHECK(op->ospf6_hello.hello_deadint);
517 			ospf6_print_bits(ospf6_option_bits,
518 			    EXTRACT_32BITS(&op->ospf6_hello.hello_options));
519 			printf(" ifid %s pri %d int %d dead %u",
520 			    ipaddr_string(&op->ospf6_hello.hello_ifid),
521 			    op->ospf6_hello.hello_priority,
522 			    EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
523 			    EXTRACT_16BITS(&op->ospf6_hello.hello_deadint));
524 		}
525 		TCHECK(op->ospf6_hello.hello_dr);
526 		if (op->ospf6_hello.hello_dr != 0)
527 			printf(" dr %s",
528 			    ipaddr_string(&op->ospf6_hello.hello_dr));
529 		TCHECK(op->ospf6_hello.hello_bdr);
530 		if (op->ospf6_hello.hello_bdr != 0)
531 			printf(" bdr %s",
532 			    ipaddr_string(&op->ospf6_hello.hello_bdr));
533 		if (vflag) {
534 			printf(" nbrs");
535 			ap = op->ospf6_hello.hello_neighbor;
536 			while ((u_char *)ap < dataend) {
537 				TCHECK(*ap);
538 				printf(" %s", ipaddr_string(ap));
539 				++ap;
540 			}
541 		}
542 		break;	/* HELLO */
543 
544 	case OSPF_TYPE_DB:
545 		TCHECK(op->ospf6_db.db_options);
546 		ospf6_print_bits(ospf6_option_bits,
547 			EXTRACT_32BITS(&op->ospf6_db.db_options));
548 		sep = ' ';
549 		TCHECK(op->ospf6_db.db_flags);
550 		if (op->ospf6_db.db_flags & OSPF6_DB_INIT) {
551 			printf("%cI", sep);
552 			sep = '/';
553 		}
554 		if (op->ospf6_db.db_flags & OSPF6_DB_MORE) {
555 			printf("%cM", sep);
556 			sep = '/';
557 		}
558 		if (op->ospf6_db.db_flags & OSPF6_DB_MASTER) {
559 			printf("%cMS", sep);
560 			sep = '/';
561 		}
562 		TCHECK(op->ospf6_db.db_seq);
563 		printf(" mtu %u S %X", EXTRACT_16BITS(&op->ospf6_db.db_mtu),
564 			EXTRACT_32BITS(&op->ospf6_db.db_seq));
565 
566 		if (vflag) {
567 			/* Print all the LS adv's */
568 			lshp = op->ospf6_db.db_lshdr;
569 
570 			while (!ospf6_print_lshdr(lshp)) {
571 							/* { (ctags) */
572 				printf(" }");
573 				++lshp;
574 			}
575 		}
576 		break;
577 
578 	case OSPF_TYPE_LSR:
579 		if (vflag) {
580 			lsrp = op->ospf6_lsr;
581 			while ((u_char *)lsrp < dataend) {
582 				TCHECK(*lsrp);
583 				printf(" {");		/* } (ctags) */
584 				ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
585 				    &lsrp->ls_stateid,
586 				    &lsrp->ls_router,
587 				    "LinkStateType %d");
588 							/* { (ctags) */
589 				printf(" }");
590 				++lsrp;
591 			}
592 		}
593 		break;
594 
595 	case OSPF_TYPE_LSU:
596 		if (vflag) {
597 			lsap = op->ospf6_lsu.lsu_lsa;
598 			TCHECK(op->ospf6_lsu.lsu_count);
599 			i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
600 			while (i--) {
601 				if (ospf6_print_lsa(lsap))
602 					goto trunc;
603 				lsap = (struct lsa *)((u_char *)lsap +
604 				    EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
605 			}
606 		}
607 		break;
608 
609 
610 	case OSPF_TYPE_LSA:
611 		if (vflag) {
612 			lshp = op->ospf6_lsa.lsa_lshdr;
613 
614 			while (!ospf6_print_lshdr(lshp)) {
615 							/* { (ctags) */
616 				printf(" }");
617 				++lshp;
618 			}
619 		}
620 		break;
621 
622 	default:
623 		printf("v3 type %d", op->ospf6_type);
624 		break;
625 	}
626 	return (0);
627 trunc:
628 	return (1);
629 }
630 
631 void
632 ospf6_print(register const u_char *bp, register u_int length)
633 {
634 	register const struct ospf6hdr *op;
635 	register const u_char *dataend;
636 	register const char *cp;
637 
638 	op = (struct ospf6hdr *)bp;
639 
640 	/* If the type is valid translate it, or just print the type */
641 	/* value.  If it's not valid, say so and return */
642 	TCHECK(op->ospf6_type);
643 	cp = tok2str(type2str, "type%d", op->ospf6_type);
644 	printf("OSPFv%d-%s %d:", op->ospf6_version, cp, length);
645 	if (*cp == 't')
646 		return;
647 
648 	TCHECK(op->ospf6_len);
649 	if (length != EXTRACT_16BITS(&op->ospf6_len)) {
650 		printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
651 		return;
652 	}
653 	dataend = bp + length;
654 
655 	/* Print the routerid if it is not the same as the source */
656 	TCHECK(op->ospf6_routerid);
657 	printf(" rtrid %s", ipaddr_string(&op->ospf6_routerid));
658 
659 	TCHECK(op->ospf6_areaid);
660 	if (op->ospf6_areaid != 0)
661 		printf(" area %s", ipaddr_string(&op->ospf6_areaid));
662 	else
663 		printf(" backbone");
664 	TCHECK(op->ospf6_instanceid);
665 	if (op->ospf6_instanceid)
666 		printf(" instance %u", op->ospf6_instanceid);
667 
668 	/* Do rest according to version.	 */
669 	switch (op->ospf6_version) {
670 
671 	case 3:
672 		/* ospf version 3 */
673 		if (ospf6_decode_v3(op, dataend))
674 			goto trunc;
675 		break;
676 
677 	default:
678 		printf(" ospf [version %d]", op->ospf6_version);
679 		break;
680 	}			/* end switch on version */
681 
682 	return;
683 trunc:
684 	fputs(tstr, stdout);
685 }
686