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 1.15 2006-09-13 06:31:11 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 "ospf.h"
43 #include "ospf6.h"
44
45 static const struct tok ospf6_option_values[] = {
46 { OSPF6_OPTION_V6, "V6" },
47 { OSPF6_OPTION_E, "External" },
48 { OSPF6_OPTION_MC, "Multicast" },
49 { OSPF6_OPTION_N, "NSSA" },
50 { OSPF6_OPTION_R, "Router" },
51 { OSPF6_OPTION_DC, "Demand Circuit" },
52 { 0, NULL }
53 };
54
55 static const struct tok ospf6_rla_flag_values[] = {
56 { RLA_FLAG_B, "ABR" },
57 { RLA_FLAG_E, "External" },
58 { RLA_FLAG_V, "Virtual-Link Endpoint" },
59 { RLA_FLAG_W, "Wildcard Receiver" },
60 { RLA_FLAG_N, "NSSA Translator" },
61 { 0, NULL }
62 };
63
64 static const struct tok ospf6_asla_flag_values[] = {
65 { ASLA_FLAG_EXTERNAL, "External Type 2" },
66 { ASLA_FLAG_FWDADDR, "Fforwarding" },
67 { ASLA_FLAG_ROUTETAG, "Tag" },
68 { 0, NULL }
69 };
70
71 static const struct tok ospf6_type_values[] = {
72 { OSPF_TYPE_HELLO, "Hello" },
73 { OSPF_TYPE_DD, "Database Description" },
74 { OSPF_TYPE_LS_REQ, "LS-Request" },
75 { OSPF_TYPE_LS_UPDATE, "LS-Update" },
76 { OSPF_TYPE_LS_ACK, "LS-Ack" },
77 { 0, NULL }
78 };
79
80 static const struct tok ospf6_lsa_values[] = {
81 { LS_TYPE_ROUTER, "Router" },
82 { LS_TYPE_NETWORK, "Network" },
83 { LS_TYPE_INTER_AP, "Inter-Area Prefix" },
84 { LS_TYPE_INTER_AR, "Inter-Area Router" },
85 { LS_TYPE_ASE, "External" },
86 { LS_TYPE_GROUP, "Multicast Group" },
87 { LS_TYPE_NSSA, "NSSA" },
88 { LS_TYPE_LINK, "Link" },
89 { LS_TYPE_INTRA_AP, "Intra-Area Prefix" },
90 { LS_TYPE_INTRA_ATE, "Intra-Area TE" },
91 { LS_TYPE_GRACE, "Grace" },
92 { 0, NULL }
93 };
94
95 static const struct tok ospf6_ls_scope_values[] = {
96 { LS_SCOPE_LINKLOCAL, "Link Local" },
97 { LS_SCOPE_AREA, "Area Local" },
98 { LS_SCOPE_AS, "Domain Wide" },
99 { 0, NULL }
100 };
101
102 static const struct tok ospf6_dd_flag_values[] = {
103 { OSPF6_DB_INIT, "Init" },
104 { OSPF6_DB_MORE, "More" },
105 { OSPF6_DB_MASTER, "Master" },
106 { 0, NULL }
107 };
108
109 static const struct tok ospf6_lsa_prefix_option_values[] = {
110 { LSA_PREFIX_OPT_NU, "No Unicast" },
111 { LSA_PREFIX_OPT_LA, "Local address" },
112 { LSA_PREFIX_OPT_MC, "Multicast" },
113 { LSA_PREFIX_OPT_P, "Propagate" },
114 { LSA_PREFIX_OPT_DN, "Down" },
115 { 0, NULL }
116 };
117
118 static char tstr[] = " [|ospf3]";
119
120 /* Forwards */
121 static void ospf6_print_ls_type(u_int, const rtrid_t *);
122 static int ospf6_print_lshdr(const struct lsa6_hdr *);
123 static int ospf6_print_lsa(const struct lsa6 *);
124 static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
125
126
127 static void
ospf6_print_ls_type(register u_int ls_type,register const rtrid_t * ls_stateid)128 ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid)
129 {
130 printf("\n\t %s LSA (%d), %s Scope%s, LSA-ID %s",
131 tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
132 ls_type & LS_TYPE_MASK,
133 tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
134 ls_type &0x8000 ? ", transitive" : "", /* U-bit */
135 ipaddr_string(ls_stateid));
136 }
137
138 static int
ospf6_print_lshdr(register const struct lsa6_hdr * lshp)139 ospf6_print_lshdr(register const struct lsa6_hdr *lshp)
140 {
141
142 TCHECK(lshp->ls_type);
143 TCHECK(lshp->ls_seq);
144
145 printf("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
146 ipaddr_string(&lshp->ls_router),
147 EXTRACT_32BITS(&lshp->ls_seq),
148 EXTRACT_16BITS(&lshp->ls_age),
149 EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr));
150
151 ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid);
152
153 return (0);
154 trunc:
155 return (1);
156 }
157
158 static int
ospf6_print_lsaprefix(const u_int8_t * tptr,u_int lsa_length)159 ospf6_print_lsaprefix(const u_int8_t *tptr, u_int lsa_length)
160 {
161 const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr;
162 u_int wordlen;
163 struct in6_addr prefix;
164
165 if (lsa_length < sizeof (*lsapp) - 4)
166 goto trunc;
167 lsa_length -= sizeof (*lsapp) - 4;
168 TCHECK2(*lsapp, sizeof (*lsapp) - 4);
169 wordlen = (lsapp->lsa_p_len + 31) / 32;
170 if (wordlen * 4 > sizeof(struct in6_addr)) {
171 printf(" bogus prefixlen /%d", lsapp->lsa_p_len);
172 goto trunc;
173 }
174 if (lsa_length < wordlen * 4)
175 goto trunc;
176 lsa_length -= wordlen * 4;
177 TCHECK2(lsapp->lsa_p_prefix, wordlen * 4);
178 memset(&prefix, 0, sizeof(prefix));
179 memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
180 printf("\n\t\t%s/%d", ip6addr_string(&prefix),
181 lsapp->lsa_p_len);
182 if (lsapp->lsa_p_opt) {
183 printf(", Options [%s]",
184 bittok2str(ospf6_lsa_prefix_option_values,
185 "none", lsapp->lsa_p_opt));
186 }
187 printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric));
188 return sizeof(*lsapp) - 4 + wordlen * 4;
189
190 trunc:
191 return -1;
192 }
193
194
195 /*
196 * Print a single link state advertisement. If truncated return 1, else 0.
197 */
198 static int
ospf6_print_lsa(register const struct lsa6 * lsap)199 ospf6_print_lsa(register const struct lsa6 *lsap)
200 {
201 register const struct rlalink6 *rlp;
202 #if 0
203 register const struct tos_metric *tosp;
204 #endif
205 register const rtrid_t *ap;
206 #if 0
207 register const struct aslametric *almp;
208 register const struct mcla *mcp;
209 #endif
210 register const struct llsa *llsap;
211 register const struct lsa6_prefix *lsapp;
212 #if 0
213 register const u_int32_t *lp;
214 #endif
215 register u_int prefixes;
216 register int bytelen;
217 register u_int length, lsa_length;
218 u_int32_t flags32;
219 const u_int8_t *tptr;
220
221 if (ospf6_print_lshdr(&lsap->ls_hdr))
222 return (1);
223 TCHECK(lsap->ls_hdr.ls_length);
224 length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
225
226 /*
227 * The LSA length includes the length of the header;
228 * it must have a value that's at least that length.
229 * If it does, find the length of what follows the
230 * header.
231 */
232 if (length < sizeof(struct lsa6_hdr))
233 return (1);
234 lsa_length = length - sizeof(struct lsa6_hdr);
235 tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr);
236
237 switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
238 case LS_TYPE_ROUTER | LS_SCOPE_AREA:
239 if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options))
240 return (1);
241 lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options);
242 TCHECK(lsap->lsa_un.un_rla.rla_options);
243 printf("\n\t Options [%s]",
244 bittok2str(ospf6_option_values, "none",
245 EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)));
246 printf(", RLA-Flags [%s]",
247 bittok2str(ospf6_rla_flag_values, "none",
248 lsap->lsa_un.un_rla.rla_flags));
249
250 rlp = lsap->lsa_un.un_rla.rla_link;
251 while (lsa_length != 0) {
252 if (lsa_length < sizeof (*rlp))
253 return (1);
254 lsa_length -= sizeof (*rlp);
255 TCHECK(*rlp);
256 switch (rlp->link_type) {
257
258 case RLA_TYPE_VIRTUAL:
259 printf("\n\t Virtual Link: Neighbor Router-ID %s"
260 "\n\t Neighbor Interface-ID %s, Interface %s",
261 ipaddr_string(&rlp->link_nrtid),
262 ipaddr_string(&rlp->link_nifid),
263 ipaddr_string(&rlp->link_ifid));
264 break;
265
266 case RLA_TYPE_ROUTER:
267 printf("\n\t Neighbor Router-ID %s"
268 "\n\t Neighbor Interface-ID %s, Interface %s",
269 ipaddr_string(&rlp->link_nrtid),
270 ipaddr_string(&rlp->link_nifid),
271 ipaddr_string(&rlp->link_ifid));
272 break;
273
274 case RLA_TYPE_TRANSIT:
275 printf("\n\t Neighbor Network-ID %s"
276 "\n\t Neighbor Interface-ID %s, Interface %s",
277 ipaddr_string(&rlp->link_nrtid),
278 ipaddr_string(&rlp->link_nifid),
279 ipaddr_string(&rlp->link_ifid));
280 break;
281
282 default:
283 printf("\n\t Unknown Router Links Type 0x%02x",
284 rlp->link_type);
285 return (0);
286 }
287 printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric));
288 rlp++;
289 }
290 break;
291
292 case LS_TYPE_NETWORK | LS_SCOPE_AREA:
293 if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options))
294 return (1);
295 lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options);
296 TCHECK(lsap->lsa_un.un_nla.nla_options);
297 printf("\n\t Options [%s]",
298 bittok2str(ospf6_option_values, "none",
299 EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)));
300
301 printf("\n\t Connected Routers:");
302 ap = lsap->lsa_un.un_nla.nla_router;
303 while (lsa_length != 0) {
304 if (lsa_length < sizeof (*ap))
305 return (1);
306 lsa_length -= sizeof (*ap);
307 TCHECK(*ap);
308 printf("\n\t\t%s", ipaddr_string(ap));
309 ++ap;
310 }
311 break;
312
313 case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
314 if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
315 return (1);
316 lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
317 TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
318 printf(", metric %u",
319 EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
320
321 tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
322 while (lsa_length != 0) {
323 bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
324 if (bytelen < 0)
325 goto trunc;
326 lsa_length -= bytelen;
327 tptr += bytelen;
328 }
329 break;
330
331 case LS_TYPE_ASE | LS_SCOPE_AS:
332 if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric))
333 return (1);
334 lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric);
335 TCHECK(lsap->lsa_un.un_asla.asla_metric);
336 flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
337 printf("\n\t Flags [%s]",
338 bittok2str(ospf6_asla_flag_values, "none", flags32));
339 printf(" metric %u",
340 EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
341 ASLA_MASK_METRIC);
342
343 tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix;
344 lsapp = (struct lsa6_prefix *)tptr;
345 bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
346 if (bytelen < 0)
347 goto trunc;
348 lsa_length -= bytelen;
349 tptr += bytelen;
350
351 if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
352 struct in6_addr *fwdaddr6;
353
354 fwdaddr6 = (struct in6_addr *)tptr;
355 if (lsa_length < sizeof (*fwdaddr6))
356 return (1);
357 lsa_length -= sizeof (*fwdaddr6);
358 TCHECK(*fwdaddr6);
359 printf(" forward %s",
360 ip6addr_string(fwdaddr6));
361 tptr += sizeof(*fwdaddr6);
362 }
363
364 if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
365 if (lsa_length < sizeof (u_int32_t))
366 return (1);
367 lsa_length -= sizeof (u_int32_t);
368 TCHECK(*(u_int32_t *)tptr);
369 printf(" tag %s",
370 ipaddr_string((u_int32_t *)tptr));
371 tptr += sizeof(u_int32_t);
372 }
373
374 if (lsapp->lsa_p_metric) {
375 if (lsa_length < sizeof (u_int32_t))
376 return (1);
377 lsa_length -= sizeof (u_int32_t);
378 TCHECK(*(u_int32_t *)tptr);
379 printf(" RefLSID: %s",
380 ipaddr_string((u_int32_t *)tptr));
381 tptr += sizeof(u_int32_t);
382 }
383 break;
384
385 case LS_TYPE_LINK:
386 /* Link LSA */
387 llsap = &lsap->lsa_un.un_llsa;
388 if (lsa_length < sizeof (llsap->llsa_priandopt))
389 return (1);
390 lsa_length -= sizeof (llsap->llsa_priandopt);
391 TCHECK(llsap->llsa_priandopt);
392 printf("\n\t Options [%s]",
393 bittok2str(ospf6_option_values, "none",
394 EXTRACT_32BITS(&llsap->llsa_options)));
395
396 if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix))
397 return (1);
398 lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix);
399 prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix);
400 printf("\n\t Priority %d, Link-local address %s, Prefixes %d:",
401 llsap->llsa_priority,
402 ip6addr_string(&llsap->llsa_lladdr),
403 prefixes);
404
405 tptr = (u_int8_t *)llsap->llsa_prefix;
406 while (prefixes > 0) {
407 bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
408 if (bytelen < 0)
409 goto trunc;
410 prefixes--;
411 lsa_length -= bytelen;
412 tptr += bytelen;
413 }
414 break;
415
416 case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
417 /* Intra-Area-Prefix LSA */
418 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid))
419 return (1);
420 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid);
421 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
422 ospf6_print_ls_type(
423 EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
424 &lsap->lsa_un.un_intra_ap.intra_ap_lsid);
425
426 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix))
427 return (1);
428 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
429 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
430 prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
431 printf("\n\t Prefixes %d:", prefixes);
432
433 tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
434 while (prefixes > 0) {
435 bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
436 if (bytelen < 0)
437 goto trunc;
438 prefixes--;
439 lsa_length -= bytelen;
440 tptr += bytelen;
441 }
442 break;
443
444 case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
445 if (ospf_print_grace_lsa(tptr, lsa_length) == -1) {
446 return 1;
447 }
448 break;
449
450 case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
451 if (ospf_print_te_lsa(tptr, lsa_length) == -1) {
452 return 1;
453 }
454 break;
455
456 default:
457 if(!print_unknown_data(tptr,
458 "\n\t ",
459 lsa_length)) {
460 return (1);
461 }
462 break;
463 }
464
465 return (0);
466 trunc:
467 return (1);
468 }
469
470 static int
ospf6_decode_v3(register const struct ospf6hdr * op,register const u_char * dataend)471 ospf6_decode_v3(register const struct ospf6hdr *op,
472 register const u_char *dataend)
473 {
474 register const rtrid_t *ap;
475 register const struct lsr6 *lsrp;
476 register const struct lsa6_hdr *lshp;
477 register const struct lsa6 *lsap;
478 register int i;
479
480 switch (op->ospf6_type) {
481
482 case OSPF_TYPE_HELLO:
483 printf("\n\tOptions [%s]",
484 bittok2str(ospf6_option_values, "none",
485 EXTRACT_32BITS(&op->ospf6_hello.hello_options)));
486
487 TCHECK(op->ospf6_hello.hello_deadint);
488 printf("\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
489 EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
490 EXTRACT_16BITS(&op->ospf6_hello.hello_deadint),
491 ipaddr_string(&op->ospf6_hello.hello_ifid),
492 op->ospf6_hello.hello_priority);
493
494 TCHECK(op->ospf6_hello.hello_dr);
495 if (op->ospf6_hello.hello_dr != 0)
496 printf("\n\t Designated Router %s",
497 ipaddr_string(&op->ospf6_hello.hello_dr));
498 TCHECK(op->ospf6_hello.hello_bdr);
499 if (op->ospf6_hello.hello_bdr != 0)
500 printf(", Backup Designated Router %s",
501 ipaddr_string(&op->ospf6_hello.hello_bdr));
502 if (vflag) {
503 printf("\n\t Neighbor List:");
504 ap = op->ospf6_hello.hello_neighbor;
505 while ((u_char *)ap < dataend) {
506 TCHECK(*ap);
507 printf("\n\t %s", ipaddr_string(ap));
508 ++ap;
509 }
510 }
511 break; /* HELLO */
512
513 case OSPF_TYPE_DD:
514 TCHECK(op->ospf6_db.db_options);
515 printf("\n\tOptions [%s]",
516 bittok2str(ospf6_option_values, "none",
517 EXTRACT_32BITS(&op->ospf6_db.db_options)));
518 TCHECK(op->ospf6_db.db_flags);
519 printf(", DD Flags [%s]",
520 bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags));
521
522 TCHECK(op->ospf6_db.db_seq);
523 printf(", MTU %u, DD-Sequence 0x%08x",
524 EXTRACT_16BITS(&op->ospf6_db.db_mtu),
525 EXTRACT_32BITS(&op->ospf6_db.db_seq));
526
527 /* Print all the LS adv's */
528 lshp = op->ospf6_db.db_lshdr;
529 while (!ospf6_print_lshdr(lshp)) {
530 ++lshp;
531 }
532 break;
533
534 case OSPF_TYPE_LS_REQ:
535 if (vflag) {
536 lsrp = op->ospf6_lsr;
537 while ((u_char *)lsrp < dataend) {
538 TCHECK(*lsrp);
539 printf("\n\t Advertising Router %s",
540 ipaddr_string(&lsrp->ls_router));
541 ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
542 &lsrp->ls_stateid);
543 ++lsrp;
544 }
545 }
546 break;
547
548 case OSPF_TYPE_LS_UPDATE:
549 if (vflag) {
550 lsap = op->ospf6_lsu.lsu_lsa;
551 TCHECK(op->ospf6_lsu.lsu_count);
552 i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
553 while (i--) {
554 if (ospf6_print_lsa(lsap))
555 goto trunc;
556 lsap = (struct lsa6 *)((u_char *)lsap +
557 EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
558 }
559 }
560 break;
561
562
563 case OSPF_TYPE_LS_ACK:
564 if (vflag) {
565 lshp = op->ospf6_lsa.lsa_lshdr;
566
567 while (!ospf6_print_lshdr(lshp)) {
568 ++lshp;
569 }
570 }
571 break;
572
573 default:
574 break;
575 }
576 return (0);
577 trunc:
578 return (1);
579 }
580
581 void
ospf6_print(register const u_char * bp,register u_int length)582 ospf6_print(register const u_char *bp, register u_int length)
583 {
584 register const struct ospf6hdr *op;
585 register const u_char *dataend;
586 register const char *cp;
587
588 op = (struct ospf6hdr *)bp;
589
590 /* If the type is valid translate it, or just print the type */
591 /* value. If it's not valid, say so and return */
592 TCHECK(op->ospf6_type);
593 cp = tok2str(ospf6_type_values, "unknown LS-type", op->ospf6_type);
594 printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length);
595 if (*cp == 'u') {
596 return;
597 }
598
599 if(!vflag) { /* non verbose - so lets bail out here */
600 return;
601 }
602
603 TCHECK(op->ospf6_len);
604 if (length != EXTRACT_16BITS(&op->ospf6_len)) {
605 printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
606 return;
607 }
608 dataend = bp + length;
609
610 /* Print the routerid if it is not the same as the source */
611 TCHECK(op->ospf6_routerid);
612 printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid));
613
614 TCHECK(op->ospf6_areaid);
615 if (op->ospf6_areaid != 0)
616 printf(", Area %s", ipaddr_string(&op->ospf6_areaid));
617 else
618 printf(", Backbone Area");
619 TCHECK(op->ospf6_instanceid);
620 if (op->ospf6_instanceid)
621 printf(", Instance %u", op->ospf6_instanceid);
622
623 /* Do rest according to version. */
624 switch (op->ospf6_version) {
625
626 case 3:
627 /* ospf version 3 */
628 if (ospf6_decode_v3(op, dataend))
629 goto trunc;
630 break;
631
632 default:
633 printf(" ospf [version %d]", op->ospf6_version);
634 break;
635 } /* end switch on version */
636
637 return;
638 trunc:
639 fputs(tstr, stdout);
640 }
641