Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-ospf6.c
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 }