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 char tstr[] = " [|ospf3]";
  46
  47 static const struct tok ospf6_option_values[] = {
  48         { OSPF6_OPTION_V6,      "V6" },
  49         { OSPF6_OPTION_E,       "External" },
  50         { OSPF6_OPTION_MC,      "Deprecated" },
  51         { OSPF6_OPTION_N,       "NSSA" },
  52         { OSPF6_OPTION_R,       "Router" },
  53         { OSPF6_OPTION_DC,      "Demand Circuit" },
  54         { OSPF6_OPTION_AF,      "AFs Support" },
  55         { OSPF6_OPTION_L,       "LLS" },
  56         { OSPF6_OPTION_AT,      "Authentication Trailer" },
  57         { 0,                    NULL }
  58 };
  59
  60 static const struct tok ospf6_rla_flag_values[] = {
  61         { RLA_FLAG_B,           "ABR" },
  62         { RLA_FLAG_E,           "External" },
  63         { RLA_FLAG_V,           "Virtual-Link Endpoint" },
  64         { RLA_FLAG_W,           "Wildcard Receiver" },
  65         { RLA_FLAG_N,           "NSSA Translator" },
  66         { 0,                    NULL }
  67 };
  68
  69 static const struct tok ospf6_asla_flag_values[] = {
  70         { ASLA_FLAG_EXTERNAL,   "External Type 2" },
  71         { ASLA_FLAG_FWDADDR,    "Forwarding" },
  72         { ASLA_FLAG_ROUTETAG,   "Tag" },
  73         { 0,                    NULL }
  74 };
  75
  76 static const struct tok ospf6_type_values[] = {
  77         { OSPF_TYPE_HELLO,      "Hello" },
  78         { OSPF_TYPE_DD,         "Database Description" },
  79         { OSPF_TYPE_LS_REQ,     "LS-Request" },
  80         { OSPF_TYPE_LS_UPDATE,  "LS-Update" },
  81         { OSPF_TYPE_LS_ACK,     "LS-Ack" },
  82         { 0,                    NULL }
  83 };
  84
  85 static const struct tok ospf6_lsa_values[] = {
  86         { LS_TYPE_ROUTER,       "Router" },
  87         { LS_TYPE_NETWORK,      "Network" },
  88         { LS_TYPE_INTER_AP,     "Inter-Area Prefix" },
  89         { LS_TYPE_INTER_AR,     "Inter-Area Router" },
  90         { LS_TYPE_ASE,          "External" },
  91         { LS_TYPE_GROUP,        "Multicast Group" },
  92         { LS_TYPE_NSSA,         "NSSA" },
  93         { LS_TYPE_LINK,         "Link" },
  94         { LS_TYPE_INTRA_AP,     "Intra-Area Prefix" },
  95         { LS_TYPE_INTRA_ATE,    "Intra-Area TE" },
  96         { LS_TYPE_GRACE,        "Grace" },
  97         { 0,                    NULL }
  98 };
  99
 100 static const struct tok ospf6_ls_scope_values[] = {
 101         { LS_SCOPE_LINKLOCAL,   "Link Local" },
 102         { LS_SCOPE_AREA,        "Area Local" },
 103         { LS_SCOPE_AS,          "Domain Wide" },
 104         { 0,                    NULL }
 105 };
 106
 107 static const struct tok ospf6_dd_flag_values[] = {
 108         { OSPF6_DB_INIT,        "Init" },
 109         { OSPF6_DB_MORE,        "More" },
 110         { OSPF6_DB_MASTER,      "Master" },
 111         { 0,                    NULL }
 112 };
 113
 114 static const struct tok ospf6_lsa_prefix_option_values[] = {
 115         { LSA_PREFIX_OPT_NU, "No Unicast" },
 116         { LSA_PREFIX_OPT_LA, "Local address" },
 117         { LSA_PREFIX_OPT_MC, "Multicast" },
 118         { LSA_PREFIX_OPT_P, "Propagate" },
 119         { LSA_PREFIX_OPT_DN, "Down" },
 120         { 0, NULL }
 121 };
 122
 123 /* Forwards */
 124 static void ospf6_print_ls_type(u_int, const rtrid_t *);
 125 static int ospf6_print_lshdr(const struct lsa6_hdr *);
 126 static int ospf6_print_lsa(const struct lsa6 *);
 127 static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
 128
 129
 130 static void
 131 ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid)
 132 {
 133         printf("\n\t    %s LSA (%d), %s Scope%s, LSA-ID %s",
 134                tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
 135                ls_type & LS_TYPE_MASK,
 136                tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
 137                ls_type &0x8000 ? ", transitive" : "", /* U-bit */
 138                ipaddr_string(ls_stateid));
 139 }
 140
 141 static int
 142 ospf6_print_lshdr(register const struct lsa6_hdr *lshp)
 143 {
 144
 145         TCHECK(lshp->ls_type);
 146         TCHECK(lshp->ls_seq);
 147
 148         printf("\n\t  Advertising Router %s, seq 0x%08x, age %us, length %u",
 149                ipaddr_string(&lshp->ls_router),
 150                EXTRACT_32BITS(&lshp->ls_seq),
 151                EXTRACT_16BITS(&lshp->ls_age),
 152                EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr));
 153
 154         ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid);
 155
 156         return (0);
 157 trunc:
 158         return (1);
 159 }
 160
 161 static int
 162 ospf6_print_lsaprefix(const u_int8_t *tptr, u_int lsa_length)
 163 {
 164         const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr;
 165         u_int wordlen;
 166         struct in6_addr prefix;
 167
 168         if (lsa_length < sizeof (*lsapp) - 4)
 169                 goto trunc;
 170         lsa_length -= sizeof (*lsapp) - 4;
 171         TCHECK2(*lsapp, sizeof (*lsapp) - 4);
 172         wordlen = (lsapp->lsa_p_len + 31) / 32;
 173         if (wordlen * 4 > sizeof(struct in6_addr)) {
 174                 printf(" bogus prefixlen /%d", lsapp->lsa_p_len);
 175                 goto trunc;
 176         }
 177         if (lsa_length < wordlen * 4)
 178                 goto trunc;
 179         lsa_length -= wordlen * 4;
 180         TCHECK2(lsapp->lsa_p_prefix, wordlen * 4);
 181         memset(&prefix, 0, sizeof(prefix));
 182         memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
 183         printf("\n\t\t%s/%d", ip6addr_string(&prefix),
 184                 lsapp->lsa_p_len);
 185         if (lsapp->lsa_p_opt) {
 186             printf(", Options [%s]",
 187                    bittok2str(ospf6_lsa_prefix_option_values,
 188                               "none", lsapp->lsa_p_opt));
 189         }
 190         printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric));
 191         return sizeof(*lsapp) - 4 + wordlen * 4;
 192
 193 trunc:
 194         return -1;
 195 }
 196
 197
 198 /*
 199  * Print a single link state advertisement.  If truncated return 1, else 0.
 200  */
 201 static int
 202 ospf6_print_lsa(register const struct lsa6 *lsap)
 203 {
 204         register const struct rlalink6 *rlp;
 205 #if 0
 206         register const struct tos_metric *tosp;
 207 #endif
 208         register const rtrid_t *ap;
 209 #if 0
 210         register const struct aslametric *almp;
 211         register const struct mcla *mcp;
 212 #endif
 213         register const struct llsa *llsap;
 214         register const struct lsa6_prefix *lsapp;
 215 #if 0
 216         register const u_int32_t *lp;
 217 #endif
 218         register u_int prefixes;
 219         register int bytelen;
 220         register u_int length, lsa_length;
 221         u_int32_t flags32;
 222         const u_int8_t *tptr;
 223
 224         if (ospf6_print_lshdr(&lsap->ls_hdr))
 225                 return (1);
 226         TCHECK(lsap->ls_hdr.ls_length);
 227         length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
 228
 229         /*
 230          * The LSA length includes the length of the header;
 231          * it must have a value that's at least that length.
 232          * If it does, find the length of what follows the
 233          * header.
 234          */
 235         if (length < sizeof(struct lsa6_hdr))
 236                 return (1);
 237         lsa_length = length - sizeof(struct lsa6_hdr);
 238         tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr);
 239
 240         switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
 241         case LS_TYPE_ROUTER | LS_SCOPE_AREA:
 242                 if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options))
 243                         return (1);
 244                 lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options);
 245                 TCHECK(lsap->lsa_un.un_rla.rla_options);
 246                 printf("\n\t      Options [%s]",
 247                        bittok2str(ospf6_option_values, "none",
 248                                   EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)));
 249                 printf(", RLA-Flags [%s]",
 250                        bittok2str(ospf6_rla_flag_values, "none",
 251                                   lsap->lsa_un.un_rla.rla_flags));
 252
 253                 rlp = lsap->lsa_un.un_rla.rla_link;
 254                 while (lsa_length != 0) {
 255                         if (lsa_length < sizeof (*rlp))
 256                                 return (1);
 257                         lsa_length -= sizeof (*rlp);
 258                         TCHECK(*rlp);
 259                         switch (rlp->link_type) {
 260
 261                         case RLA_TYPE_VIRTUAL:
 262                                 printf("\n\t      Virtual Link: Neighbor Router-ID %s"
 263                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 264                                        ipaddr_string(&rlp->link_nrtid),
 265                                        ipaddr_string(&rlp->link_nifid),
 266                                        ipaddr_string(&rlp->link_ifid));
 267                                 break;
 268
 269                         case RLA_TYPE_ROUTER:
 270                                 printf("\n\t      Neighbor Router-ID %s"
 271                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 272                                        ipaddr_string(&rlp->link_nrtid),
 273                                        ipaddr_string(&rlp->link_nifid),
 274                                        ipaddr_string(&rlp->link_ifid));
 275                                 break;
 276
 277                         case RLA_TYPE_TRANSIT:
 278                                 printf("\n\t      Neighbor Network-ID %s"
 279                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 280                                     ipaddr_string(&rlp->link_nrtid),
 281                                     ipaddr_string(&rlp->link_nifid),
 282                                     ipaddr_string(&rlp->link_ifid));
 283                                 break;
 284
 285                         default:
 286                                 printf("\n\t      Unknown Router Links Type 0x%02x",
 287                                     rlp->link_type);
 288                                 return (0);
 289                         }
 290                         printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric));
 291                         rlp++;
 292                 }
 293                 break;
 294
 295         case LS_TYPE_NETWORK | LS_SCOPE_AREA:
 296                 if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options))
 297                         return (1);
 298                 lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options);
 299                 TCHECK(lsap->lsa_un.un_nla.nla_options);
 300                 printf("\n\t      Options [%s]",
 301                        bittok2str(ospf6_option_values, "none",
 302                                   EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)));
 303
 304                 printf("\n\t      Connected Routers:");
 305                 ap = lsap->lsa_un.un_nla.nla_router;
 306                 while (lsa_length != 0) {
 307                         if (lsa_length < sizeof (*ap))
 308                                 return (1);
 309                         lsa_length -= sizeof (*ap);
 310                         TCHECK(*ap);
 311                         printf("\n\t\t%s", ipaddr_string(ap));
 312                         ++ap;
 313                 }
 314                 break;
 315
 316         case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
 317                 if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
 318                         return (1);
 319                 lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
 320                 TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
 321                 printf(", metric %u",
 322                         EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
 323
 324                 tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
 325                 while (lsa_length != 0) {
 326                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 327                         if (bytelen < 0)
 328                                 goto trunc;
 329                         lsa_length -= bytelen;
 330                         tptr += bytelen;
 331                 }
 332                 break;
 333
 334         case LS_TYPE_ASE | LS_SCOPE_AS:
 335                 if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric))
 336                         return (1);
 337                 lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric);
 338                 TCHECK(lsap->lsa_un.un_asla.asla_metric);
 339                 flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
 340                 printf("\n\t     Flags [%s]",
 341                        bittok2str(ospf6_asla_flag_values, "none", flags32));
 342                 printf(" metric %u",
 343                        EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
 344                        ASLA_MASK_METRIC);
 345
 346                 tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix;
 347                 lsapp = (struct lsa6_prefix *)tptr;
 348                 bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 349                 if (bytelen < 0)
 350                         goto trunc;
 351                 lsa_length -= bytelen;
 352                 tptr += bytelen;
 353
 354                 if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
 355                         struct in6_addr *fwdaddr6;
 356
 357                         fwdaddr6 = (struct in6_addr *)tptr;
 358                         if (lsa_length < sizeof (*fwdaddr6))
 359                                 return (1);
 360                         lsa_length -= sizeof (*fwdaddr6);
 361                         TCHECK(*fwdaddr6);
 362                         printf(" forward %s",
 363                                ip6addr_string(fwdaddr6));
 364                         tptr += sizeof(*fwdaddr6);
 365                 }
 366
 367                 if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
 368                         if (lsa_length < sizeof (u_int32_t))
 369                                 return (1);
 370                         lsa_length -= sizeof (u_int32_t);
 371                         TCHECK(*(u_int32_t *)tptr);
 372                         printf(" tag %s",
 373                                ipaddr_string((u_int32_t *)tptr));
 374                         tptr += sizeof(u_int32_t);
 375                 }
 376
 377                 if (lsapp->lsa_p_metric) {
 378                         if (lsa_length < sizeof (u_int32_t))
 379                                 return (1);
 380                         lsa_length -= sizeof (u_int32_t);
 381                         TCHECK(*(u_int32_t *)tptr);
 382                         printf(" RefLSID: %s",
 383                                ipaddr_string((u_int32_t *)tptr));
 384                         tptr += sizeof(u_int32_t);
 385                 }
 386                 break;
 387
 388         case LS_TYPE_LINK:
 389                 /* Link LSA */
 390                 llsap = &lsap->lsa_un.un_llsa;
 391                 if (lsa_length < sizeof (llsap->llsa_priandopt))
 392                         return (1);
 393                 lsa_length -= sizeof (llsap->llsa_priandopt);
 394                 TCHECK(llsap->llsa_priandopt);
 395                 printf("\n\t      Options [%s]",
 396                        bittok2str(ospf6_option_values, "none",
 397                                   EXTRACT_32BITS(&llsap->llsa_options)));
 398
 399                 if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix))
 400                         return (1);
 401                 lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix);
 402                 prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix);
 403                 printf("\n\t      Priority %d, Link-local address %s, Prefixes %d:",
 404                        llsap->llsa_priority,
 405                        ip6addr_string(&llsap->llsa_lladdr),
 406                        prefixes);
 407
 408                 tptr = (u_int8_t *)llsap->llsa_prefix;
 409                 while (prefixes > 0) {
 410                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 411                         if (bytelen < 0)
 412                                 goto trunc;
 413                         prefixes--;
 414                         lsa_length -= bytelen;
 415                         tptr += bytelen;
 416                 }
 417                 break;
 418
 419         case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
 420                 /* Intra-Area-Prefix LSA */
 421                 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid))
 422                         return (1);
 423                 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid);
 424                 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
 425                 ospf6_print_ls_type(
 426                         EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
 427                         &lsap->lsa_un.un_intra_ap.intra_ap_lsid);
 428
 429                 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix))
 430                         return (1);
 431                 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 432                 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 433                 prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 434                 printf("\n\t      Prefixes %d:", prefixes);
 435
 436                 tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
 437                 while (prefixes > 0) {
 438                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 439                         if (bytelen < 0)
 440                                 goto trunc;
 441                         prefixes--;
 442                         lsa_length -= bytelen;
 443                         tptr += bytelen;
 444                 }
 445                 break;
 446
 447         case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
 448                 if (ospf_print_grace_lsa(tptr, lsa_length) == -1) {
 449                     return 1;
 450                 }
 451                 break;
 452
 453         case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
 454                 if (ospf_print_te_lsa(tptr, lsa_length) == -1) {
 455                     return 1;
 456                 }
 457                 break;
 458
 459         default:
 460                 if(!print_unknown_data(tptr,
 461                                        "\n\t      ",
 462                                        lsa_length)) {
 463                     return (1);
 464                 }
 465                 break;
 466         }
 467
 468         return (0);
 469 trunc:
 470         return (1);
 471 }
 472
 473 static int
 474 ospf6_decode_v3(register const struct ospf6hdr *op,
 475     register const u_char *dataend)
 476 {
 477         register const rtrid_t *ap;
 478         register const struct lsr6 *lsrp;
 479         register const struct lsa6_hdr *lshp;
 480         register const struct lsa6 *lsap;
 481         register int i;
 482
 483         switch (op->ospf6_type) {
 484
 485         case OSPF_TYPE_HELLO:
 486                 printf("\n\tOptions [%s]",
 487                        bittok2str(ospf6_option_values, "none",
 488                                   EXTRACT_32BITS(&op->ospf6_hello.hello_options)));
 489
 490                 TCHECK(op->ospf6_hello.hello_deadint);
 491                 printf("\n\t  Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
 492                        EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
 493                        EXTRACT_16BITS(&op->ospf6_hello.hello_deadint),
 494                        ipaddr_string(&op->ospf6_hello.hello_ifid),
 495                        op->ospf6_hello.hello_priority);
 496
 497                 TCHECK(op->ospf6_hello.hello_dr);
 498                 if (op->ospf6_hello.hello_dr != 0)
 499                         printf("\n\t  Designated Router %s",
 500                             ipaddr_string(&op->ospf6_hello.hello_dr));
 501                 TCHECK(op->ospf6_hello.hello_bdr);
 502                 if (op->ospf6_hello.hello_bdr != 0)
 503                         printf(", Backup Designated Router %s",
 504                             ipaddr_string(&op->ospf6_hello.hello_bdr));
 505                 if (vflag) {
 506                         printf("\n\t  Neighbor List:");
 507                         ap = op->ospf6_hello.hello_neighbor;
 508                         while ((u_char *)ap < dataend) {
 509                                 TCHECK(*ap);
 510                                 printf("\n\t    %s", ipaddr_string(ap));
 511                                 ++ap;
 512                         }
 513                 }
 514                 break;  /* HELLO */
 515
 516         case OSPF_TYPE_DD:
 517                 TCHECK(op->ospf6_db.db_options);
 518                 printf("\n\tOptions [%s]",
 519                        bittok2str(ospf6_option_values, "none",
 520                                   EXTRACT_32BITS(&op->ospf6_db.db_options)));
 521                 TCHECK(op->ospf6_db.db_flags);
 522                 printf(", DD Flags [%s]",
 523                        bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags));
 524
 525                 TCHECK(op->ospf6_db.db_seq);
 526                 printf(", MTU %u, DD-Sequence 0x%08x",
 527                        EXTRACT_16BITS(&op->ospf6_db.db_mtu),
 528                        EXTRACT_32BITS(&op->ospf6_db.db_seq));
 529
 530                 /* Print all the LS adv's */
 531                 lshp = op->ospf6_db.db_lshdr;
 532                 while (!ospf6_print_lshdr(lshp)) {
 533                     ++lshp;
 534                 }
 535                 break;
 536
 537         case OSPF_TYPE_LS_REQ:
 538                 if (vflag) {
 539                         lsrp = op->ospf6_lsr;
 540                         while ((u_char *)lsrp < dataend) {
 541                                 TCHECK(*lsrp);
 542                                 printf("\n\t  Advertising Router %s",
 543                                        ipaddr_string(&lsrp->ls_router));
 544                                 ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
 545                                                     &lsrp->ls_stateid);
 546                                 ++lsrp;
 547                         }
 548                 }
 549                 break;
 550
 551         case OSPF_TYPE_LS_UPDATE:
 552                 if (vflag) {
 553                         lsap = op->ospf6_lsu.lsu_lsa;
 554                         TCHECK(op->ospf6_lsu.lsu_count);
 555                         i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
 556                         while (i--) {
 557                                 if (ospf6_print_lsa(lsap))
 558                                         goto trunc;
 559                                 lsap = (struct lsa6 *)((u_char *)lsap +
 560                                     EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
 561                         }
 562                 }
 563                 break;
 564
 565
 566         case OSPF_TYPE_LS_ACK:
 567                 if (vflag) {
 568                         lshp = op->ospf6_lsa.lsa_lshdr;
 569
 570                         while (!ospf6_print_lshdr(lshp)) {
 571                                 ++lshp;
 572                         }
 573                 }
 574                 break;
 575
 576         default:
 577                 break;
 578         }
 579         return (0);
 580 trunc:
 581         return (1);
 582 }
 583
 584 void
 585 ospf6_print(register const u_char *bp, register u_int length)
 586 {
 587         register const struct ospf6hdr *op;
 588         register const u_char *dataend;
 589         register const char *cp;
 590
 591         op = (struct ospf6hdr *)bp;
 592
 593         /* If the type is valid translate it, or just print the type */
 594         /* value.  If it's not valid, say so and return */
 595         TCHECK(op->ospf6_type);
 596         cp = tok2str(ospf6_type_values, "unknown LS-type", op->ospf6_type);
 597         printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length);
 598         if (*cp == 'u') {
 599                 return;
 600         }
 601
 602         if(!vflag) { /* non verbose - so lets bail out here */
 603                 return;
 604         }
 605
 606         TCHECK(op->ospf6_len);
 607         if (length != EXTRACT_16BITS(&op->ospf6_len)) {
 608                 printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
 609                 return;
 610         }
 611         dataend = bp + length;
 612
 613         /* Print the routerid if it is not the same as the source */
 614         TCHECK(op->ospf6_routerid);
 615         printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid));
 616
 617         TCHECK(op->ospf6_areaid);
 618         if (op->ospf6_areaid != 0)
 619                 printf(", Area %s", ipaddr_string(&op->ospf6_areaid));
 620         else
 621                 printf(", Backbone Area");
 622         TCHECK(op->ospf6_instanceid);
 623         if (op->ospf6_instanceid)
 624                 printf(", Instance %u", op->ospf6_instanceid);
 625
 626         /* Do rest according to version.         */
 627         switch (op->ospf6_version) {
 628
 629         case 3:
 630                 /* ospf version 3 */
 631                 if (ospf6_decode_v3(op, dataend))
 632                         goto trunc;
 633                 break;
 634
 635         default:
 636                 printf(" ospf [version %d]", op->ospf6_version);
 637                 break;
 638         }                       /* end switch on version */
 639
 640         return;
 641 trunc:
 642         fputs(tstr, stdout);
 643 }