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 /* 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
 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
 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
 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
 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
 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
 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 }