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
25static 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
44struct bits {
45	u_int32_t bit;
46	const char *str;
47};
48
49static 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
59static 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
67static 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
74static 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
84static char tstr[] = " [|ospf]";
85
86#ifdef WIN32
87#define inline __inline
88#endif /* WIN32 */
89
90/* Forwards */
91static inline void ospf6_print_seqage(u_int32_t, time_t);
92static inline void ospf6_print_bits(const struct bits *, u_char);
93static void ospf6_print_ls_type(u_int, const rtrid_t *,
94    const rtrid_t *, const char *);
95static int ospf6_print_lshdr(const struct lsa_hdr *);
96static int ospf6_print_lsa(const struct lsa *);
97static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
98
99static inline void
100ospf6_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
117static inline void
118ospf6_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
130static void
131ospf6_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
213static int
214ospf6_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);
226trunc:
227	return (1);
228}
229
230static int
231ospf6_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
252trunc:
253	return -1;
254}
255
256
257/*
258 * Print a single link state advertisement.  If truncated return 1, else 0.
259 */
260static int
261ospf6_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);
489trunc:
490	fputs(" }", stdout);
491	return (1);
492}
493
494static int
495ospf6_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);
627trunc:
628	return (1);
629}
630
631void
632ospf6_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;
683trunc:
684	fputs(tstr, stdout);
685}
686