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,        "Deprecated" },
  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         { LS_TYPE_RI,           "Router Information" },
  98         { LS_TYPE_INTER_ASTE,   "Inter-AS-TE" },
  99         { LS_TYPE_L1VPN,        "Layer 1 VPN" },
 100         { 0,                    NULL }
 101 };
 102
 103 static const struct tok ospf6_ls_scope_values[] = {
 104         { LS_SCOPE_LINKLOCAL,   "Link Local" },
 105         { LS_SCOPE_AREA,        "Area Local" },
 106         { LS_SCOPE_AS,          "Domain Wide" },
 107         { 0,                    NULL }
 108 };
 109
 110 static const struct tok ospf6_dd_flag_values[] = {
 111         { OSPF6_DB_INIT,        "Init" },
 112         { OSPF6_DB_MORE,        "More" },
 113         { OSPF6_DB_MASTER,      "Master" },
 114         { OSPF6_DB_M6,          "IPv6 MTU" },
 115         { 0,                    NULL }
 116 };
 117
 118 static const struct tok ospf6_lsa_prefix_option_values[] = {
 119         { LSA_PREFIX_OPT_NU, "No Unicast" },
 120         { LSA_PREFIX_OPT_LA, "Local address" },
 121         { LSA_PREFIX_OPT_MC, "Deprecated" },
 122         { LSA_PREFIX_OPT_P, "Propagate" },
 123         { LSA_PREFIX_OPT_DN, "Down" },
 124         { 0, NULL }
 125 };
 126
 127
 128 static void
 129 ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid)
 130 {
 131         printf("\n\t    %s LSA (%d), %s Scope%s, LSA-ID %s",
 132                tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
 133                ls_type & LS_TYPE_MASK,
 134                tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
 135                ls_type &0x8000 ? ", transitive" : "", /* U-bit */
 136                ipaddr_string(ls_stateid));
 137 }
 138
 139 static int
 140 ospf6_print_lshdr(register const struct lsa6_hdr *lshp)
 141 {
 142
 143         TCHECK(lshp->ls_type);
 144         TCHECK(lshp->ls_seq);
 145
 146         printf("\n\t  Advertising Router %s, seq 0x%08x, age %us, length %u",
 147                ipaddr_string(&lshp->ls_router),
 148                EXTRACT_32BITS(&lshp->ls_seq),
 149                EXTRACT_16BITS(&lshp->ls_age),
 150                EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr));
 151
 152         ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid);
 153
 154         return (0);
 155 trunc:
 156         return (1);
 157 }
 158
 159 static int
 160 ospf6_print_lsaprefix(const u_int8_t *tptr, u_int lsa_length)
 161 {
 162         const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr;
 163         u_int wordlen;
 164         struct in6_addr prefix;
 165
 166         if (lsa_length < sizeof (*lsapp) - 4)
 167                 goto trunc;
 168         lsa_length -= sizeof (*lsapp) - 4;
 169         TCHECK2(*lsapp, sizeof (*lsapp) - 4);
 170         wordlen = (lsapp->lsa_p_len + 31) / 32;
 171         if (wordlen * 4 > sizeof(struct in6_addr)) {
 172                 printf(" bogus prefixlen /%d", lsapp->lsa_p_len);
 173                 goto trunc;
 174         }
 175         if (lsa_length < wordlen * 4)
 176                 goto trunc;
 177         lsa_length -= wordlen * 4;
 178         TCHECK2(lsapp->lsa_p_prefix, wordlen * 4);
 179         memset(&prefix, 0, sizeof(prefix));
 180         memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
 181         printf("\n\t\t%s/%d", ip6addr_string(&prefix),
 182                 lsapp->lsa_p_len);
 183         if (lsapp->lsa_p_opt) {
 184             printf(", Options [%s]",
 185                    bittok2str(ospf6_lsa_prefix_option_values,
 186                               "none", lsapp->lsa_p_opt));
 187         }
 188         printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric));
 189         return sizeof(*lsapp) - 4 + wordlen * 4;
 190
 191 trunc:
 192         return -1;
 193 }
 194
 195
 196 /*
 197  * Print a single link state advertisement.  If truncated return 1, else 0.
 198  */
 199 static int
 200 ospf6_print_lsa(register const struct lsa6 *lsap)
 201 {
 202         register const struct rlalink6 *rlp;
 203 #if 0
 204         register const struct tos_metric *tosp;
 205 #endif
 206         register const rtrid_t *ap;
 207 #if 0
 208         register const struct aslametric *almp;
 209         register const struct mcla *mcp;
 210 #endif
 211         register const struct llsa *llsap;
 212         register const struct lsa6_prefix *lsapp;
 213 #if 0
 214         register const u_int32_t *lp;
 215 #endif
 216         register u_int prefixes;
 217         register int bytelen;
 218         register u_int length, lsa_length;
 219         u_int32_t flags32;
 220         const u_int8_t *tptr;
 221
 222         if (ospf6_print_lshdr(&lsap->ls_hdr))
 223                 return (1);
 224         TCHECK(lsap->ls_hdr.ls_length);
 225         length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
 226
 227         /*
 228          * The LSA length includes the length of the header;
 229          * it must have a value that's at least that length.
 230          * If it does, find the length of what follows the
 231          * header.
 232          */
 233         if (length < sizeof(struct lsa6_hdr))
 234                 return (1);
 235         lsa_length = length - sizeof(struct lsa6_hdr);
 236         tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr);
 237
 238         switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
 239         case LS_TYPE_ROUTER | LS_SCOPE_AREA:
 240                 if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options))
 241                         return (1);
 242                 lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options);
 243                 TCHECK(lsap->lsa_un.un_rla.rla_options);
 244                 printf("\n\t      Options [%s]",
 245                        bittok2str(ospf6_option_values, "none",
 246                                   EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)));
 247                 printf(", RLA-Flags [%s]",
 248                        bittok2str(ospf6_rla_flag_values, "none",
 249                                   lsap->lsa_un.un_rla.rla_flags));
 250
 251                 rlp = lsap->lsa_un.un_rla.rla_link;
 252                 while (lsa_length != 0) {
 253                         if (lsa_length < sizeof (*rlp))
 254                                 return (1);
 255                         lsa_length -= sizeof (*rlp);
 256                         TCHECK(*rlp);
 257                         switch (rlp->link_type) {
 258
 259                         case RLA_TYPE_VIRTUAL:
 260                                 printf("\n\t      Virtual Link: Neighbor Router-ID %s"
 261                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 262                                        ipaddr_string(&rlp->link_nrtid),
 263                                        ipaddr_string(&rlp->link_nifid),
 264                                        ipaddr_string(&rlp->link_ifid));
 265                                 break;
 266
 267                         case RLA_TYPE_ROUTER:
 268                                 printf("\n\t      Neighbor Router-ID %s"
 269                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 270                                        ipaddr_string(&rlp->link_nrtid),
 271                                        ipaddr_string(&rlp->link_nifid),
 272                                        ipaddr_string(&rlp->link_ifid));
 273                                 break;
 274
 275                         case RLA_TYPE_TRANSIT:
 276                                 printf("\n\t      Neighbor Network-ID %s"
 277                                        "\n\t      Neighbor Interface-ID %s, Interface %s",
 278                                     ipaddr_string(&rlp->link_nrtid),
 279                                     ipaddr_string(&rlp->link_nifid),
 280                                     ipaddr_string(&rlp->link_ifid));
 281                                 break;
 282
 283                         default:
 284                                 printf("\n\t      Unknown Router Links Type 0x%02x",
 285                                     rlp->link_type);
 286                                 return (0);
 287                         }
 288                         printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric));
 289                         rlp++;
 290                 }
 291                 break;
 292
 293         case LS_TYPE_NETWORK | LS_SCOPE_AREA:
 294                 if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options))
 295                         return (1);
 296                 lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options);
 297                 TCHECK(lsap->lsa_un.un_nla.nla_options);
 298                 printf("\n\t      Options [%s]",
 299                        bittok2str(ospf6_option_values, "none",
 300                                   EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)));
 301
 302                 printf("\n\t      Connected Routers:");
 303                 ap = lsap->lsa_un.un_nla.nla_router;
 304                 while (lsa_length != 0) {
 305                         if (lsa_length < sizeof (*ap))
 306                                 return (1);
 307                         lsa_length -= sizeof (*ap);
 308                         TCHECK(*ap);
 309                         printf("\n\t\t%s", ipaddr_string(ap));
 310                         ++ap;
 311                 }
 312                 break;
 313
 314         case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
 315                 if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
 316                         return (1);
 317                 lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
 318                 TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
 319                 printf(", metric %u",
 320                         EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
 321
 322                 tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
 323                 while (lsa_length != 0) {
 324                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 325                         if (bytelen < 0)
 326                                 goto trunc;
 327                         lsa_length -= bytelen;
 328                         tptr += bytelen;
 329                 }
 330                 break;
 331
 332         case LS_TYPE_ASE | LS_SCOPE_AS:
 333                 if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric))
 334                         return (1);
 335                 lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric);
 336                 TCHECK(lsap->lsa_un.un_asla.asla_metric);
 337                 flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
 338                 printf("\n\t     Flags [%s]",
 339                        bittok2str(ospf6_asla_flag_values, "none", flags32));
 340                 printf(" metric %u",
 341                        EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
 342                        ASLA_MASK_METRIC);
 343
 344                 tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix;
 345                 lsapp = (struct lsa6_prefix *)tptr;
 346                 bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 347                 if (bytelen < 0)
 348                         goto trunc;
 349                 lsa_length -= bytelen;
 350                 tptr += bytelen;
 351
 352                 if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
 353                         struct in6_addr *fwdaddr6;
 354
 355                         fwdaddr6 = (struct in6_addr *)tptr;
 356                         if (lsa_length < sizeof (*fwdaddr6))
 357                                 return (1);
 358                         lsa_length -= sizeof (*fwdaddr6);
 359                         TCHECK(*fwdaddr6);
 360                         printf(" forward %s",
 361                                ip6addr_string(fwdaddr6));
 362                         tptr += sizeof(*fwdaddr6);
 363                 }
 364
 365                 if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
 366                         if (lsa_length < sizeof (u_int32_t))
 367                                 return (1);
 368                         lsa_length -= sizeof (u_int32_t);
 369                         TCHECK(*(u_int32_t *)tptr);
 370                         printf(" tag %s",
 371                                ipaddr_string((u_int32_t *)tptr));
 372                         tptr += sizeof(u_int32_t);
 373                 }
 374
 375                 if (lsapp->lsa_p_metric) {
 376                         if (lsa_length < sizeof (u_int32_t))
 377                                 return (1);
 378                         lsa_length -= sizeof (u_int32_t);
 379                         TCHECK(*(u_int32_t *)tptr);
 380                         printf(" RefLSID: %s",
 381                                ipaddr_string((u_int32_t *)tptr));
 382                         tptr += sizeof(u_int32_t);
 383                 }
 384                 break;
 385
 386         case LS_TYPE_LINK:
 387                 /* Link LSA */
 388                 llsap = &lsap->lsa_un.un_llsa;
 389                 if (lsa_length < sizeof (llsap->llsa_priandopt))
 390                         return (1);
 391                 lsa_length -= sizeof (llsap->llsa_priandopt);
 392                 TCHECK(llsap->llsa_priandopt);
 393                 printf("\n\t      Options [%s]",
 394                        bittok2str(ospf6_option_values, "none",
 395                                   EXTRACT_32BITS(&llsap->llsa_options)));
 396
 397                 if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix))
 398                         return (1);
 399                 lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix);
 400                 prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix);
 401                 printf("\n\t      Priority %d, Link-local address %s, Prefixes %d:",
 402                        llsap->llsa_priority,
 403                        ip6addr_string(&llsap->llsa_lladdr),
 404                        prefixes);
 405
 406                 tptr = (u_int8_t *)llsap->llsa_prefix;
 407                 while (prefixes > 0) {
 408                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 409                         if (bytelen < 0)
 410                                 goto trunc;
 411                         prefixes--;
 412                         lsa_length -= bytelen;
 413                         tptr += bytelen;
 414                 }
 415                 break;
 416
 417         case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
 418                 /* Intra-Area-Prefix LSA */
 419                 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid))
 420                         return (1);
 421                 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid);
 422                 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
 423                 ospf6_print_ls_type(
 424                         EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
 425                         &lsap->lsa_un.un_intra_ap.intra_ap_lsid);
 426
 427                 if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix))
 428                         return (1);
 429                 lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 430                 TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 431                 prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
 432                 printf("\n\t      Prefixes %d:", prefixes);
 433
 434                 tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
 435                 while (prefixes > 0) {
 436                         bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
 437                         if (bytelen < 0)
 438                                 goto trunc;
 439                         prefixes--;
 440                         lsa_length -= bytelen;
 441                         tptr += bytelen;
 442                 }
 443                 break;
 444
 445         case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
 446                 if (ospf_print_grace_lsa(tptr, lsa_length) == -1) {
 447                     return 1;
 448                 }
 449                 break;
 450
 451         case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
 452                 if (ospf_print_te_lsa(tptr, lsa_length) == -1) {
 453                     return 1;
 454                 }
 455                 break;
 456
 457         default:
 458                 if(!print_unknown_data(tptr,
 459                                        "\n\t      ",
 460                                        lsa_length)) {
 461                     return (1);
 462                 }
 463                 break;
 464         }
 465
 466         return (0);
 467 trunc:
 468         return (1);
 469 }
 470
 471 static int
 472 ospf6_decode_v3(register const struct ospf6hdr *op,
 473     register const u_char *dataend)
 474 {
 475         register const rtrid_t *ap;
 476         register const struct lsr6 *lsrp;
 477         register const struct lsa6_hdr *lshp;
 478         register const struct lsa6 *lsap;
 479         register int i;
 480
 481         switch (op->ospf6_type) {
 482
 483         case OSPF_TYPE_HELLO:
 484                 printf("\n\tOptions [%s]",
 485                        bittok2str(ospf6_option_values, "none",
 486                                   EXTRACT_32BITS(&op->ospf6_hello.hello_options)));
 487
 488                 TCHECK(op->ospf6_hello.hello_deadint);
 489                 printf("\n\t  Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
 490                        EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
 491                        EXTRACT_16BITS(&op->ospf6_hello.hello_deadint),
 492                        ipaddr_string(&op->ospf6_hello.hello_ifid),
 493                        op->ospf6_hello.hello_priority);
 494
 495                 TCHECK(op->ospf6_hello.hello_dr);
 496                 if (op->ospf6_hello.hello_dr != 0)
 497                         printf("\n\t  Designated Router %s",
 498                             ipaddr_string(&op->ospf6_hello.hello_dr));
 499                 TCHECK(op->ospf6_hello.hello_bdr);
 500                 if (op->ospf6_hello.hello_bdr != 0)
 501                         printf(", Backup Designated Router %s",
 502                             ipaddr_string(&op->ospf6_hello.hello_bdr));
 503                 if (vflag > 1) {
 504                         printf("\n\t  Neighbor List:");
 505                         ap = op->ospf6_hello.hello_neighbor;
 506                         while ((u_char *)ap < dataend) {
 507                                 TCHECK(*ap);
 508                                 printf("\n\t    %s", ipaddr_string(ap));
 509                                 ++ap;
 510                         }
 511                 }
 512                 break;  /* HELLO */
 513
 514         case OSPF_TYPE_DD:
 515                 TCHECK(op->ospf6_db.db_options);
 516                 printf("\n\tOptions [%s]",
 517                        bittok2str(ospf6_option_values, "none",
 518                                   EXTRACT_32BITS(&op->ospf6_db.db_options)));
 519                 TCHECK(op->ospf6_db.db_flags);
 520                 printf(", DD Flags [%s]",
 521                        bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags));
 522
 523                 TCHECK(op->ospf6_db.db_seq);
 524                 printf(", MTU %u, DD-Sequence 0x%08x",
 525                        EXTRACT_16BITS(&op->ospf6_db.db_mtu),
 526                        EXTRACT_32BITS(&op->ospf6_db.db_seq));
 527                 if (vflag > 1) {
 528                         /* Print all the LS adv's */
 529                         lshp = op->ospf6_db.db_lshdr;
 530                         while (!ospf6_print_lshdr(lshp)) {
 531                                 ++lshp;
 532                         }
 533                 }
 534                 break;
 535
 536         case OSPF_TYPE_LS_REQ:
 537                 if (vflag > 1) {
 538                         lsrp = op->ospf6_lsr;
 539                         while ((u_char *)lsrp < dataend) {
 540                                 TCHECK(*lsrp);
 541                                 printf("\n\t  Advertising Router %s",
 542                                        ipaddr_string(&lsrp->ls_router));
 543                                 ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
 544                                                     &lsrp->ls_stateid);
 545                                 ++lsrp;
 546                         }
 547                 }
 548                 break;
 549
 550         case OSPF_TYPE_LS_UPDATE:
 551                 if (vflag > 1) {
 552                         lsap = op->ospf6_lsu.lsu_lsa;
 553                         TCHECK(op->ospf6_lsu.lsu_count);
 554                         i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
 555                         while (i--) {
 556                                 if (ospf6_print_lsa(lsap))
 557                                         goto trunc;
 558                                 lsap = (struct lsa6 *)((u_char *)lsap +
 559                                     EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
 560                         }
 561                 }
 562                 break;
 563
 564
 565         case OSPF_TYPE_LS_ACK:
 566                 if (vflag > 1) {
 567                         lshp = op->ospf6_lsa.lsa_lshdr;
 568
 569                         while (!ospf6_print_lshdr(lshp)) {
 570                                 ++lshp;
 571                         }
 572                 }
 573                 break;
 574
 575         default:
 576                 break;
 577         }
 578         return (0);
 579 trunc:
 580         return (1);
 581 }
 582
 583 void
 584 ospf6_print(register const u_char *bp, register u_int length)
 585 {
 586         register const struct ospf6hdr *op;
 587         register const u_char *dataend;
 588         register const char *cp;
 589
 590         op = (struct ospf6hdr *)bp;
 591
 592         /* If the type is valid translate it, or just print the type */
 593         /* value.  If it's not valid, say so and return */
 594         TCHECK(op->ospf6_type);
 595         cp = tok2str(ospf6_type_values, "unknown packet type (%u)", op->ospf6_type);
 596         printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length);
 597         if (*cp == 'u') {
 598                 return;
 599         }
 600
 601         if(!vflag) { /* non verbose - so lets bail out here */
 602                 return;
 603         }
 604
 605         TCHECK(op->ospf6_len);
 606         if (length != EXTRACT_16BITS(&op->ospf6_len)) {
 607                 printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
 608                 return;
 609         }
 610         dataend = bp + length;
 611
 612         TCHECK(op->ospf6_routerid);
 613         printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid));
 614
 615         TCHECK(op->ospf6_areaid);
 616         if (op->ospf6_areaid != 0)
 617                 printf(", Area %s", ipaddr_string(&op->ospf6_areaid));
 618         else
 619                 printf(", Backbone Area");
 620         TCHECK(op->ospf6_instanceid);
 621         if (op->ospf6_instanceid)
 622                 printf(", Instance %u", op->ospf6_instanceid);
 623
 624         /* Do rest according to version.         */
 625         switch (op->ospf6_version) {
 626
 627         case 3:
 628                 /* ospf version 3 */
 629                 if (ospf6_decode_v3(op, dataend))
 630                         goto trunc;
 631                 break;
 632         }                       /* end switch on version */
 633
 634         return;
 635 trunc:
 636         fputs(tstr, stdout);
 637 }