The Tcpdump Group git mirrors - tcpdump/blob - 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 1.15 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 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 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 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 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 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 #ifdef WIN32
 121 #define inline __inline
 122 #endif /* WIN32 */
 123
 124 /* Forwards */
 125 static void ospf6_print_ls_type(u_int, const rtrid_t *);
 126 static int ospf6_print_lshdr(const struct lsa6_hdr *);
 127 static int ospf6_print_lsa(const struct lsa6 *);
 128 static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
 129
 130
 131 static void
 132 ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid)
 133 {
 134         printf("\n\t    %s LSA (%d), %s Scope%s, LSA-ID %s",
 135                tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
 136                ls_type & LS_TYPE_MASK,
 137                tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
 138                ls_type &0x8000 ? ", transitive" : "", /* U-bit */
 139                ipaddr_string(ls_stateid));
 140 }
 141
 142 static int
 143 ospf6_print_lshdr(register const struct lsa6_hdr *lshp)
 144 {
 145
 146         TCHECK(lshp->ls_type);
 147         TCHECK(lshp->ls_seq);
 148
 149         printf("\n\t  Advertising Router %s, seq 0x%08x, age %us, length %u",
 150                ipaddr_string(&lshp->ls_router),
 151                EXTRACT_32BITS(&lshp->ls_seq),
 152                EXTRACT_16BITS(&lshp->ls_age),
 153                EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr));
 154
 155         ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid);
 156
 157         return (0);
 158 trunc:
 159         return (1);
 160 }
 161
 162 static int
 163 ospf6_print_lsaprefix(const u_int8_t *tptr, u_int lsa_length)
 164 {
 165         const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr;
 166         u_int wordlen;
 167         struct in6_addr prefix;
 168
 169         if (lsa_length < sizeof (*lsapp) - 4)
 170                 goto trunc;
 171         lsa_length -= sizeof (*lsapp) - 4;
 172         TCHECK2(*lsapp, sizeof (*lsapp) - 4);
 173         wordlen = (lsapp->lsa_p_len + 31) / 32;
 174         if (wordlen * 4 > sizeof(struct in6_addr)) {
 175                 printf(" bogus prefixlen /%d", lsapp->lsa_p_len);
 176                 goto trunc;
 177         }
 178         if (lsa_length < wordlen * 4)
 179                 goto trunc;
 180         lsa_length -= wordlen * 4;
 181         TCHECK2(lsapp->lsa_p_prefix, wordlen * 4);
 182         memset(&prefix, 0, sizeof(prefix));
 183         memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
 184         printf("\n\t\t%s/%d", ip6addr_string(&prefix),
 185                 lsapp->lsa_p_len);
 186         if (lsapp->lsa_p_opt) {
 187             printf(", Options [%s]",
 188                    bittok2str(ospf6_lsa_prefix_option_values,
 189                               "none", lsapp->lsa_p_opt));
 190         }
 191         printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric));
 192         return sizeof(*lsapp) - 4 + wordlen * 4;
 193
 194 trunc:
 195         return -1;
 196 }
 197
 198
 199 /*
 200  * Print a single link state advertisement.  If truncated return 1, else 0.
 201  */
 202 static int
 203 ospf6_print_lsa(register const struct lsa6 *lsap)
 204 {
 205         register const struct rlalink6 *rlp;
 206 #if 0
 207         register const struct tos_metric *tosp;
 208 #endif
 209         register const rtrid_t *ap;
 210 #if 0
 211         register const struct aslametric *almp;
 212         register const struct mcla *mcp;
 213 #endif
 214         register const struct llsa *llsap;
 215         register const struct lsa6_prefix *lsapp;
 216 #if 0
 217         register const u_int32_t *lp;
 218 #endif
 219         register u_int prefixes;
 220         register int bytelen;
 221         register u_int length, lsa_length;
 222         u_int32_t flags32;
 223         const u_int8_t *tptr;
 224
 225         if (ospf6_print_lshdr(&lsap->ls_hdr))
 226                 return (1);
 227         TCHECK(lsap->ls_hdr.ls_length);
 228         length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
 229
 230         /*
 231          * The LSA length includes the length of the header;
 232          * it must have a value that's at least that length.
 233          * If it does, find the length of what follows the
 234          * header.
 235          */
 236         if (length < sizeof(struct lsa6_hdr))
 237                 return (1);
 238         lsa_length = length - sizeof(struct lsa6_hdr);
 239         tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr);
 240
 241         switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
 242         case LS_TYPE_ROUTER | LS_SCOPE_AREA:
 243                 if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options))
 244                         return (1);
 245                 lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options);
 246                 TCHECK(lsap->lsa_un.un_rla.rla_options);
 247                 printf("\n\t      Options [%s]",
 248                        bittok2str(ospf6_option_values, "none",
 249                                   EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)));
 250                 printf(", RLA-Flags [%s]",
 251                        bittok2str(ospf6_rla_flag_values, "none",
 252                                   lsap->lsa_un.un_rla.rla_flags));
 253
 254                 rlp = lsap->lsa_un.un_rla.rla_link;
 255                 while (lsa_length != 0) {
 256                         if (lsa_length < sizeof (*rlp))
 257                                 return (1);
 258                         lsa_length -= sizeof (*rlp);
 259                         TCHECK(*rlp);
 260                         switch (rlp->link_type) {
 261
 262                         case RLA_TYPE_VIRTUAL:
 263                                 printf("\n\t      Virtual Link: Neighbor Router-ID %s"
 264                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 265                                        ipaddr_string(&rlp->link_nrtid),
 266                                        ipaddr_string(&rlp->link_nifid),
 267                                        ipaddr_string(&rlp->link_ifid));
 268                                 break;
 269
 270                         case RLA_TYPE_ROUTER:
 271                                 printf("\n\t      Neighbor Router-ID %s"
 272                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 273                                        ipaddr_string(&rlp->link_nrtid),
 274                                        ipaddr_string(&rlp->link_nifid),
 275                                        ipaddr_string(&rlp->link_ifid));
 276                                 break;
 277
 278                         case RLA_TYPE_TRANSIT:
 279                                 printf("\n\t      Neighbor Network-ID %s"
 280                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 281                                     ipaddr_string(&rlp->link_nrtid),
 282                                     ipaddr_string(&rlp->link_nifid),
 283                                     ipaddr_string(&rlp->link_ifid));
 284                                 break;
 285
 286                         default:
 287                                 printf("\n\t      Unknown Router Links Type 0x%02x",
 288                                     rlp->link_type);
 289                                 return (0);
 290                         }
 291                         printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric));
 292                         rlp++;
 293                 }
 294                 break;
 295
 296         case LS_TYPE_NETWORK | LS_SCOPE_AREA:
 297                 if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options))
 298                         return (1);
 299                 lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options);
 300                 TCHECK(lsap->lsa_un.un_nla.nla_options);
 301                 printf("\n\t      Options [%s]",
 302                        bittok2str(ospf6_option_values, "none",
 303                                   EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)));
 304
 305                 printf("\n\t      Connected Routers:");
 306                 ap = lsap->lsa_un.un_nla.nla_router;
 307                 while (lsa_length != 0) {
 308                         if (lsa_length < sizeof (*ap))
 309                                 return (1);
 310                         lsa_length -= sizeof (*ap);
 311                         TCHECK(*ap);
 312                         printf("\n\t\t%s", ipaddr_string(ap));
 313                         ++ap;
 314                 }
 315                 break;
 316
 317         case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
 318                 if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
 319                         return (1);
 320                 lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
 321                 TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
 322                 printf(", metric %u",
 323                         EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
 324
 325                 tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
 326                 while (lsa_length != 0) {
 327                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 328                         if (bytelen < 0)
 329                                 goto trunc;
 330                         lsa_length -= bytelen;
 331                         tptr += bytelen;
 332                 }
 333                 break;
 334
 335         case LS_TYPE_ASE | LS_SCOPE_AS:
 336                 if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric))
 337                         return (1);
 338                 lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric);
 339                 TCHECK(lsap->lsa_un.un_asla.asla_metric);
 340                 flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
 341                 printf("\n\t     Flags [%s]",
 342                        bittok2str(ospf6_asla_flag_values, "none", flags32));
 343                 printf(" metric %u",
 344                        EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
 345                        ASLA_MASK_METRIC);
 346
 347                 tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix;
 348                 lsapp = (struct lsa6_prefix *)tptr;
 349                 bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 350                 if (bytelen < 0)
 351                         goto trunc;
 352                 lsa_length -= bytelen;
 353                 tptr += bytelen;
 354
 355                 if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
 356                         struct in6_addr *fwdaddr6;
 357
 358                         fwdaddr6 = (struct in6_addr *)tptr;
 359                         if (lsa_length < sizeof (*fwdaddr6))
 360                                 return (1);
 361                         lsa_length -= sizeof (*fwdaddr6);
 362                         TCHECK(*fwdaddr6);
 363                         printf(" forward %s",
 364                                ip6addr_string(fwdaddr6));
 365                         tptr += sizeof(*fwdaddr6);
 366                 }
 367
 368                 if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
 369                         if (lsa_length < sizeof (u_int32_t))
 370                                 return (1);
 371                         lsa_length -= sizeof (u_int32_t);
 372                         TCHECK(*(u_int32_t *)tptr);
 373                         printf(" tag %s",
 374                                ipaddr_string((u_int32_t *)tptr));
 375                         tptr += sizeof(u_int32_t);
 376                 }
 377
 378                 if (lsapp->lsa_p_metric) {
 379                         if (lsa_length < sizeof (u_int32_t))
 380                                 return (1);
 381                         lsa_length -= sizeof (u_int32_t);
 382                         TCHECK(*(u_int32_t *)tptr);
 383                         printf(" RefLSID: %s",
 384                                ipaddr_string((u_int32_t *)tptr));
 385                         tptr += sizeof(u_int32_t);
 386                 }
 387                 break;
 388
 389         case LS_TYPE_LINK:
 390                 /* Link LSA */
 391                 llsap = &lsap->lsa_un.un_llsa;
 392                 if (lsa_length < sizeof (llsap->llsa_priandopt))
 393                         return (1);
 394                 lsa_length -= sizeof (llsap->llsa_priandopt);
 395                 TCHECK(llsap->llsa_priandopt);
 396                 printf("\n\t      Options [%s]",
 397                        bittok2str(ospf6_option_values, "none",
 398                                   EXTRACT_32BITS(&llsap->llsa_options)));
 399
 400                 if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix))
 401                         return (1);
 402                 lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix);
 403                 prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix);
 404                 printf("\n\t      Priority %d, Link-local address %s, Prefixes %d:",
 405                        llsap->llsa_priority,
 406                        ip6addr_string(&llsap->llsa_lladdr),
 407                        prefixes);
 408
 409                 tptr = (u_int8_t *)llsap->llsa_prefix;
 410                 while (prefixes > 0) {
 411                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 412                         if (bytelen < 0)
 413                                 goto trunc;
 414                         prefixes--;
 415                         lsa_length -= bytelen;
 416                         tptr += bytelen;
 417                 }
 418                 break;
 419
 420         case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
 421                 /* Intra-Area-Prefix LSA */
 422                 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid))
 423                         return (1);
 424                 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid);
 425                 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
 426                 ospf6_print_ls_type(
 427                         EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
 428                         &lsap->lsa_un.un_intra_ap.intra_ap_lsid);
 429
 430                 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix))
 431                         return (1);
 432                 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 433                 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 434                 prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 435                 printf("\n\t      Prefixes %d:", prefixes);
 436
 437                 tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
 438                 while (prefixes > 0) {
 439                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 440                         if (bytelen < 0)
 441                                 goto trunc;
 442                         prefixes--;
 443                         lsa_length -= bytelen;
 444                         tptr += bytelen;
 445                 }
 446                 break;
 447
 448         case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
 449                 if (ospf_print_grace_lsa(tptr, lsa_length) == -1) {
 450                     return 1;
 451                 }
 452                 break;
 453
 454         case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
 455                 if (ospf_print_te_lsa(tptr, lsa_length) == -1) {
 456                     return 1;
 457                 }
 458                 break;
 459
 460         default:
 461                 if(!print_unknown_data(tptr,
 462                                        "\n\t      ",
 463                                        lsa_length)) {
 464                     return (1);
 465                 }
 466                 break;
 467         }
 468
 469         return (0);
 470 trunc:
 471         return (1);
 472 }
 473
 474 static int
 475 ospf6_decode_v3(register const struct ospf6hdr *op,
 476     register const u_char *dataend)
 477 {
 478         register const rtrid_t *ap;
 479         register const struct lsr6 *lsrp;
 480         register const struct lsa6_hdr *lshp;
 481         register const struct lsa6 *lsap;
 482         register int i;
 483
 484         switch (op->ospf6_type) {
 485
 486         case OSPF_TYPE_HELLO:
 487                 printf("\n\tOptions [%s]",
 488                        bittok2str(ospf6_option_values, "none",
 489                                   EXTRACT_32BITS(&op->ospf6_hello.hello_options)));
 490
 491                 TCHECK(op->ospf6_hello.hello_deadint);
 492                 printf("\n\t  Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
 493                        EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
 494                        EXTRACT_16BITS(&op->ospf6_hello.hello_deadint),
 495                        ipaddr_string(&op->ospf6_hello.hello_ifid),
 496                        op->ospf6_hello.hello_priority);
 497
 498                 TCHECK(op->ospf6_hello.hello_dr);
 499                 if (op->ospf6_hello.hello_dr != 0)
 500                         printf("\n\t  Designated Router %s",
 501                             ipaddr_string(&op->ospf6_hello.hello_dr));
 502                 TCHECK(op->ospf6_hello.hello_bdr);
 503                 if (op->ospf6_hello.hello_bdr != 0)
 504                         printf(", Backup Designated Router %s",
 505                             ipaddr_string(&op->ospf6_hello.hello_bdr));
 506                 if (vflag) {
 507                         printf("\n\t  Neighbor List:");
 508                         ap = op->ospf6_hello.hello_neighbor;
 509                         while ((u_char *)ap < dataend) {
 510                                 TCHECK(*ap);
 511                                 printf("\n\t    %s", ipaddr_string(ap));
 512                                 ++ap;
 513                         }
 514                 }
 515                 break;  /* HELLO */
 516
 517         case OSPF_TYPE_DD:
 518                 TCHECK(op->ospf6_db.db_options);
 519                 printf("\n\tOptions [%s]",
 520                        bittok2str(ospf6_option_values, "none",
 521                                   EXTRACT_32BITS(&op->ospf6_db.db_options)));
 522                 TCHECK(op->ospf6_db.db_flags);
 523                 printf(", DD Flags [%s]",
 524                        bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags));
 525
 526                 TCHECK(op->ospf6_db.db_seq);
 527                 printf(", MTU %u, DD-Sequence 0x%08x",
 528                        EXTRACT_16BITS(&op->ospf6_db.db_mtu),
 529                        EXTRACT_32BITS(&op->ospf6_db.db_seq));
 530
 531                 /* Print all the LS adv's */
 532                 lshp = op->ospf6_db.db_lshdr;
 533                 while (!ospf6_print_lshdr(lshp)) {
 534                     ++lshp;
 535                 }
 536                 break;
 537
 538         case OSPF_TYPE_LS_REQ:
 539                 if (vflag) {
 540                         lsrp = op->ospf6_lsr;
 541                         while ((u_char *)lsrp < dataend) {
 542                                 TCHECK(*lsrp);
 543                                 printf("\n\t  Advertising Router %s",
 544                                        ipaddr_string(&lsrp->ls_router));
 545                                 ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
 546                                                     &lsrp->ls_stateid);
 547                                 ++lsrp;
 548                         }
 549                 }
 550                 break;
 551
 552         case OSPF_TYPE_LS_UPDATE:
 553                 if (vflag) {
 554                         lsap = op->ospf6_lsu.lsu_lsa;
 555                         TCHECK(op->ospf6_lsu.lsu_count);
 556                         i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
 557                         while (i--) {
 558                                 if (ospf6_print_lsa(lsap))
 559                                         goto trunc;
 560                                 lsap = (struct lsa6 *)((u_char *)lsap +
 561                                     EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
 562                         }
 563                 }
 564                 break;
 565
 566
 567         case OSPF_TYPE_LS_ACK:
 568                 if (vflag) {
 569                         lshp = op->ospf6_lsa.lsa_lshdr;
 570
 571                         while (!ospf6_print_lshdr(lshp)) {
 572                                 ++lshp;
 573                         }
 574                 }
 575                 break;
 576
 577         default:
 578                 break;
 579         }
 580         return (0);
 581 trunc:
 582         return (1);
 583 }
 584
 585 void
 586 ospf6_print(register const u_char *bp, register u_int length)
 587 {
 588         register const struct ospf6hdr *op;
 589         register const u_char *dataend;
 590         register const char *cp;
 591
 592         op = (struct ospf6hdr *)bp;
 593
 594         /* If the type is valid translate it, or just print the type */
 595         /* value.  If it's not valid, say so and return */
 596         TCHECK(op->ospf6_type);
 597         cp = tok2str(ospf6_type_values, "unknown LS-type", op->ospf6_type);
 598         printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length);
 599         if (*cp == 'u') {
 600                 return;
 601         }
 602
 603         if(!vflag) { /* non verbose - so lets bail out here */
 604                 return;
 605         }
 606
 607         TCHECK(op->ospf6_len);
 608         if (length != EXTRACT_16BITS(&op->ospf6_len)) {
 609                 printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
 610                 return;
 611         }
 612         dataend = bp + length;
 613
 614         /* Print the routerid if it is not the same as the source */
 615         TCHECK(op->ospf6_routerid);
 616         printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid));
 617
 618         TCHECK(op->ospf6_areaid);
 619         if (op->ospf6_areaid != 0)
 620                 printf(", Area %s", ipaddr_string(&op->ospf6_areaid));
 621         else
 622                 printf(", Backbone Area");
 623         TCHECK(op->ospf6_instanceid);
 624         if (op->ospf6_instanceid)
 625                 printf(", Instance %u", op->ospf6_instanceid);
 626
 627         /* Do rest according to version.         */
 628         switch (op->ospf6_version) {
 629
 630         case 3:
 631                 /* ospf version 3 */
 632                 if (ospf6_decode_v3(op, dataend))
 633                         goto trunc;
 634                 break;
 635
 636         default:
 637                 printf(" ospf [version %d]", op->ospf6_version);
 638                 break;
 639         }                       /* end switch on version */
 640
 641         return;
 642 trunc:
 643         fputs(tstr, stdout);
 644 }