user/tcpdump/print-ospf.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-ospf.c,v 1.56.2.2 2005/05/06 07:57:19 guy Exp $ (LBL)";
  27 #endif
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #if !defined(EMBED)
  34
  35 #include <tcpdump-stdinc.h>
  36
  37 #include <stdio.h>
  38
  39 #include "interface.h"
  40 #include "addrtoname.h"
  41 #include "extract.h"
  42 #include "gmpls.h"
  43
  44 #include "ospf.h"
  45
  46 #include "ip.h"
  47
  48 static struct tok ospf_option_values[] = {
  49         { OSPF_OPTION_T,        "TOS" },
  50         { OSPF_OPTION_E,        "External" },
  51         { OSPF_OPTION_MC,       "Multicast" },
  52         { OSPF_OPTION_NP,       "NSSA" },
  53         { OSPF_OPTION_EA,       "Advertise External" },
  54         { OSPF_OPTION_DC,       "Demand Circuit" },
  55         { OSPF_OPTION_O,        "Opaque" },
  56         { OSPF_OPTION_DN,       "Up/Down" },
  57         { 0,                    NULL }
  58 };
  59
  60 static struct tok ospf_authtype_values[] = {
  61         { OSPF_AUTH_NONE,       "none" },
  62         { OSPF_AUTH_NONE,       "simple" },
  63         { OSPF_AUTH_MD5,        "MD5" },
  64         { 0,                    NULL }
  65 };
  66
  67 static struct tok ospf_rla_flag_values[] = {
  68         { RLA_FLAG_B,           "ABR" },
  69         { RLA_FLAG_E,           "ASBR" },
  70         { RLA_FLAG_W1,          "Virtual" },
  71         { RLA_FLAG_W2,          "W2" },
  72         { 0,                    NULL }
  73 };
  74
  75 static struct tok type2str[] = {
  76         { OSPF_TYPE_UMD,        "UMD" },
  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 struct tok lsa_values[] = {
  86         { LS_TYPE_ROUTER,       "Router" },
  87         { LS_TYPE_NETWORK,      "Network" },
  88         { LS_TYPE_SUM_IP,       "Summary" },
  89         { LS_TYPE_SUM_ABR,      "ASBR Summary" },
  90         { LS_TYPE_ASE,          "External" },
  91         { LS_TYPE_GROUP,        "Multicast Group" },
  92         { LS_TYPE_NSSA,         "NSSA" },
  93         { LS_TYPE_OPAQUE_LL,    "Link Local Opaque" },
  94         { LS_TYPE_OPAQUE_AL,    "Area Local Opaque" },
  95         { LS_TYPE_OPAQUE_DW,    "Domain Wide Opaque" },
  96         { 0,                    NULL }
  97 };
  98
  99 static struct tok ospf_dd_flag_values[] = {
 100         { OSPF_DB_INIT,         "Init" },
 101         { OSPF_DB_MORE,         "More" },
 102         { OSPF_DB_MASTER,       "Master" },
 103         { 0,                    NULL }
 104 };
 105
 106 static struct tok lsa_opaque_values[] = {
 107         { LS_OPAQUE_TYPE_TE,    "Traffic Engineering" },
 108         { LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
 109         { LS_OPAQUE_TYPE_RI,    "Router Information" },
 110         { 0,                    NULL }
 111 };
 112
 113 static struct tok lsa_opaque_te_tlv_values[] = {
 114         { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
 115         { LS_OPAQUE_TE_TLV_LINK,   "Link" },
 116         { 0,                    NULL }
 117 };
 118
 119 static struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
 120         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE,            "Link Type" },
 121         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID,              "Link ID" },
 122         { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP,             "Local Interface IP address" },
 123         { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP,            "Remote Interface IP address" },
 124         { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC,            "Traffic Engineering Metric" },
 125         { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW,               "Maximum Bandwidth" },
 126         { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW,           "Maximum Reservable Bandwidth" },
 127         { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW,             "Unreserved Bandwidth" },
 128         { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP,          "Administrative Group" },
 129         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
 130         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
 131         { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR,    "Interface Switching Capability" },
 132         { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP,    "Shared Risk Link Group" },
 133         { LS_OPAQUE_TE_LINK_SUBTLV_DIFFSERV_TE,          "Diffserv TE" },
 134         { 0,                    NULL }
 135 };
 136
 137 static struct tok lsa_opaque_grace_tlv_values[] = {
 138         { LS_OPAQUE_GRACE_TLV_PERIOD,             "Grace Period" },
 139         { LS_OPAQUE_GRACE_TLV_REASON,             "Graceful restart Reason" },
 140         { LS_OPAQUE_GRACE_TLV_INT_ADDRESS,        "IPv4 interface address" },
 141         { 0,                    NULL }
 142 };
 143
 144 static struct tok lsa_opaque_grace_tlv_reason_values[] = {
 145         { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN,     "Unknown" },
 146         { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART,  "Software Restart" },
 147         { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE,  "Software Reload/Upgrade" },
 148         { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH,   "Control Processor Switch" },
 149         { 0,                    NULL }
 150 };
 151
 152 static struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
 153         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
 154         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA,  "Multi-Access" },
 155         { 0,                    NULL }
 156 };
 157
 158 static struct tok lsa_opaque_ri_tlv_values[] = {
 159         { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
 160         { 0,                    NULL }
 161 };
 162
 163 static struct tok lsa_opaque_ri_tlv_cap_values[] = {
 164         { 1, "Reserved" },
 165         { 2, "Reserved" },
 166         { 4, "Reserved" },
 167         { 8, "Reserved" },
 168         { 16, "graceful restart capable" },
 169         { 32, "graceful restart helper" },
 170         { 64, "Stub router support" },
 171         { 128, "Traffic engineering" },
 172         { 256, "p2p over LAN" },
 173         { 512, "path computation server" },
 174         { 0,                    NULL }
 175 };
 176
 177 static char tstr[] = " [|ospf]";
 178
 179 #ifdef WIN32
 180 #define inline __inline
 181 #endif /* WIN32 */
 182
 183 static int ospf_print_lshdr(const struct lsa_hdr *);
 184 static const u_char *ospf_print_lsa(const struct lsa *);
 185 static int ospf_decode_v2(const struct ospfhdr *, const u_char *);
 186
 187 static int
 188 ospf_print_lshdr(register const struct lsa_hdr *lshp)
 189 {
 190         u_int ls_length;
 191
 192         TCHECK(lshp->ls_length);
 193         ls_length = EXTRACT_16BITS(&lshp->ls_length);
 194         if (ls_length < sizeof(struct lsa_hdr)) {
 195                 printf("\n\t    Bogus length %u < %lu", ls_length,
 196                     (unsigned long)sizeof(struct lsa_hdr));
 197                 return(-1);
 198         }
 199
 200         TCHECK(lshp->ls_seq);   /* XXX - ls_length check checked this */
 201         printf("\n\t  Advertising Router: %s, seq 0x%08x, age %us, length: %u",
 202                ipaddr_string(&lshp->ls_router),
 203                EXTRACT_32BITS(&lshp->ls_seq),
 204                EXTRACT_16BITS(&lshp->ls_age),
 205                ls_length-(u_int)sizeof(struct lsa_hdr));
 206
 207         TCHECK(lshp->ls_type);  /* XXX - ls_length check checked this */
 208         switch (lshp->ls_type) {
 209         /* the LSA header for opaque LSAs was slightly changed */
 210         case LS_TYPE_OPAQUE_LL:
 211         case LS_TYPE_OPAQUE_AL:
 212         case LS_TYPE_OPAQUE_DW:
 213             printf("\n\t    %s LSA (%d), Opaque-Type: %s LSA (%u), Opaque-ID: %u",
 214                    tok2str(lsa_values,"unknown",lshp->ls_type),
 215                    lshp->ls_type,
 216
 217                    tok2str(lsa_opaque_values,
 218                            "unknown",
 219                            *(&lshp->un_lsa_id.opaque_field.opaque_type)),
 220                    *(&lshp->un_lsa_id.opaque_field.opaque_type),
 221                    EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id)
 222
 223                    );
 224             break;
 225
 226         /* all other LSA types use regular style LSA headers */
 227         default:
 228             printf("\n\t    %s LSA (%d), LSA-ID: %s",
 229                    tok2str(lsa_values,"unknown",lshp->ls_type),
 230                    lshp->ls_type,
 231                    ipaddr_string(&lshp->un_lsa_id.lsa_id));
 232             break;
 233         }
 234
 235         TCHECK(lshp->ls_options);       /* XXX - ls_length check checked this */
 236         printf("\n\t    Options: [%s]", bittok2str(ospf_option_values,"none",lshp->ls_options));
 237
 238         return (ls_length);
 239 trunc:
 240         return (-1);
 241 }
 242
 243 /*
 244  * Print a single link state advertisement.  If truncated or if LSA length
 245  * field is less than the length of the LSA header, return NULl, else
 246  * return pointer to data past end of LSA.
 247  */
 248 static const u_int8_t *
 249 ospf_print_lsa(register const struct lsa *lsap)
 250 {
 251         register const u_int8_t *ls_end;
 252         register const struct rlalink *rlp;
 253         register const struct tos_metric *tosp;
 254         register const struct in_addr *ap;
 255         register const struct aslametric *almp;
 256         register const struct mcla *mcp;
 257         register const u_int32_t *lp;
 258         register int j, k, tlv_type, tlv_length, subtlv_type, subtlv_length, priority_level, bandwidth_constraint;
 259         register int ls_length;
 260         const u_int8_t *tptr;
 261         int count_srlg;
 262         union { /* int to float conversion buffer for several subTLVs */
 263             float f;
 264             u_int32_t i;
 265         } bw;
 266
 267         tptr = (u_int8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
 268         ls_length = ospf_print_lshdr(&lsap->ls_hdr);
 269         if (ls_length == -1)
 270                 return(NULL);
 271         ls_end = (u_int8_t *)lsap + ls_length;
 272         ls_length -= sizeof(struct lsa_hdr);
 273
 274         switch (lsap->ls_hdr.ls_type) {
 275
 276         case LS_TYPE_ROUTER:
 277                 TCHECK(lsap->lsa_un.un_rla.rla_flags);
 278                 printf("\n\t    Router LSA Options: [%s]", bittok2str(ospf_rla_flag_values,"none",lsap->lsa_un.un_rla.rla_flags));
 279
 280                 TCHECK(lsap->lsa_un.un_rla.rla_count);
 281                 j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count);
 282                 TCHECK(lsap->lsa_un.un_rla.rla_link);
 283                 rlp = lsap->lsa_un.un_rla.rla_link;
 284                 while (j--) {
 285                         TCHECK(*rlp);
 286                         switch (rlp->link_type) {
 287
 288                         case RLA_TYPE_VIRTUAL:
 289                                 printf("\n\t      Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
 290                                     ipaddr_string(&rlp->link_id),
 291                                     ipaddr_string(&rlp->link_data));
 292                                 break;
 293
 294                         case RLA_TYPE_ROUTER:
 295                                 printf("\n\t      Neighbor Router-ID: %s, Interface Address: %s",
 296                                     ipaddr_string(&rlp->link_id),
 297                                     ipaddr_string(&rlp->link_data));
 298                                 break;
 299
 300                         case RLA_TYPE_TRANSIT:
 301                                 printf("\n\t      Neighbor Network-ID: %s, Interface Address: %s",
 302                                     ipaddr_string(&rlp->link_id),
 303                                     ipaddr_string(&rlp->link_data));
 304                                 break;
 305
 306                         case RLA_TYPE_STUB:
 307                                 printf("\n\t      Stub Network: %s, Mask: %s",
 308                                     ipaddr_string(&rlp->link_id),
 309                                     ipaddr_string(&rlp->link_data));
 310                                 break;
 311
 312                         default:
 313                                 printf("\n\t      Unknown Router Link Type (%u)",
 314                                     rlp->link_type);
 315                                 return (ls_end);
 316                         }
 317                         printf(", tos 0, metric: %d", EXTRACT_16BITS(&rlp->link_tos0metric));
 318                         tosp = (struct tos_metric *)
 319                             ((sizeof rlp->link_tos0metric) + (u_char *) rlp);
 320                         for (k = 0; k < (int) rlp->link_toscount; ++k, ++tosp) {
 321                                 TCHECK(*tosp);
 322                                 printf(", tos %d, metric: %d",
 323                                     tosp->tos_type,
 324                                     EXTRACT_16BITS(&tosp->tos_metric));
 325                         }
 326                         rlp = (struct rlalink *)((u_char *)(rlp + 1) +
 327                             ((rlp->link_toscount) * sizeof(*tosp)));
 328                 }
 329                 break;
 330
 331         case LS_TYPE_NETWORK:
 332                 TCHECK(lsap->lsa_un.un_nla.nla_mask);
 333                 printf("\n\t    Mask %s\n\t    Connected Routers:",
 334                     ipaddr_string(&lsap->lsa_un.un_nla.nla_mask));
 335                 ap = lsap->lsa_un.un_nla.nla_router;
 336                 while ((u_char *)ap < ls_end) {
 337                         TCHECK(*ap);
 338                         printf("\n\t      %s", ipaddr_string(ap));
 339                         ++ap;
 340                 }
 341                 break;
 342
 343         case LS_TYPE_SUM_IP:
 344                 TCHECK(lsap->lsa_un.un_nla.nla_mask);
 345                 printf("\n\t    Mask %s",
 346                     ipaddr_string(&lsap->lsa_un.un_sla.sla_mask));
 347                 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
 348                 lp = lsap->lsa_un.un_sla.sla_tosmetric;
 349                 /* suppress tos if its not supported */
 350                 if(!((lsap->ls_hdr.ls_options)&OSPF_OPTION_T)) {
 351                     printf(", metric: %u", EXTRACT_32BITS(lp)&SLA_MASK_METRIC);
 352                     break;
 353                 }
 354                 while ((u_char *)lp < ls_end) {
 355                         register u_int32_t ul;
 356
 357                         TCHECK(*lp);
 358                         ul = EXTRACT_32BITS(lp);
 359                         printf(", tos %d metric %d",
 360                             (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
 361                             ul & SLA_MASK_METRIC);
 362                         ++lp;
 363                 }
 364                 break;
 365
 366         case LS_TYPE_SUM_ABR:
 367                 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
 368                 lp = lsap->lsa_un.un_sla.sla_tosmetric;
 369                 /* suppress tos if its not supported */
 370                 if(!((lsap->ls_hdr.ls_options)&OSPF_OPTION_T)) {
 371                     printf(", metric: %u", EXTRACT_32BITS(lp)&SLA_MASK_METRIC);
 372                     break;
 373                 }
 374                 while ((u_char *)lp < ls_end) {
 375                         register u_int32_t ul;
 376
 377                         TCHECK(*lp);
 378                         ul = EXTRACT_32BITS(lp);
 379                         printf(", tos %d metric %d",
 380                             (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
 381                             ul & SLA_MASK_METRIC);
 382                         ++lp;
 383                 }
 384                 break;
 385
 386         case LS_TYPE_ASE:
 387         case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */
 388                 TCHECK(lsap->lsa_un.un_nla.nla_mask);
 389                 printf("\n\t    Mask %s",
 390                     ipaddr_string(&lsap->lsa_un.un_asla.asla_mask));
 391
 392                 TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
 393                 almp = lsap->lsa_un.un_asla.asla_metric;
 394                 while ((u_char *)almp < ls_end) {
 395                         register u_int32_t ul;
 396
 397                         TCHECK(almp->asla_tosmetric);
 398                         ul = EXTRACT_32BITS(&almp->asla_tosmetric);
 399                         printf(", type %d, tos %d metric:",
 400                             (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1,
 401                             (ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
 402                         if ((ul & ASLA_MASK_METRIC)==0xffffff)
 403                             printf(" infinite");
 404                         else
 405                             printf(" %d", (ul & ASLA_MASK_METRIC));
 406
 407                         TCHECK(almp->asla_forward);
 408                         if (almp->asla_forward.s_addr) {
 409                                 printf(", forward %s",
 410                                     ipaddr_string(&almp->asla_forward));
 411                         }
 412                         TCHECK(almp->asla_tag);
 413                         if (almp->asla_tag.s_addr) {
 414                                 printf(", tag %s",
 415                                     ipaddr_string(&almp->asla_tag));
 416                         }
 417                         ++almp;
 418                 }
 419                 break;
 420
 421         case LS_TYPE_GROUP:
 422                 /* Multicast extensions as of 23 July 1991 */
 423                 mcp = lsap->lsa_un.un_mcla;
 424                 while ((u_char *)mcp < ls_end) {
 425                         TCHECK(mcp->mcla_vid);
 426                         switch (EXTRACT_32BITS(&mcp->mcla_vtype)) {
 427
 428                         case MCLA_VERTEX_ROUTER:
 429                                 printf("\n\t    Router Router-ID %s",
 430                                     ipaddr_string(&mcp->mcla_vid));
 431                                 break;
 432
 433                         case MCLA_VERTEX_NETWORK:
 434                                 printf("\n\t    Network Designated Router %s",
 435                                     ipaddr_string(&mcp->mcla_vid));
 436                                 break;
 437
 438                         default:
 439                                 printf("\n\t    unknown VertexType (%u)",
 440                                     EXTRACT_32BITS(&mcp->mcla_vtype));
 441                                 break;
 442                         }
 443                 ++mcp;
 444                 }
 445                 break;
 446
 447         case LS_TYPE_OPAQUE_LL: /* fall through */
 448         case LS_TYPE_OPAQUE_AL:
 449         case LS_TYPE_OPAQUE_DW:
 450
 451             switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) {
 452             case LS_OPAQUE_TYPE_RI:
 453                 tptr = (u_int8_t *)(&lsap->lsa_un.un_ri_tlv.type);
 454
 455                 while (ls_length != 0) {
 456                     TCHECK2(*tptr, 4);
 457                     if (ls_length < 4) {
 458                         printf("\n\t    Remaining LS length %u < 4", ls_length);
 459                         return(ls_end);
 460                     }
 461                     tlv_type = EXTRACT_16BITS(tptr);
 462                     tlv_length = EXTRACT_16BITS(tptr+2);
 463                     tptr+=4;
 464                     ls_length-=4;
 465
 466                     printf("\n\t    %s TLV (%u), length: %u, value: ",
 467                            tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type),
 468                            tlv_type,
 469                            tlv_length);
 470
 471                     if (tlv_length > ls_length) {
 472                         printf("\n\t    Bogus length %u > %u", tlv_length,
 473                             ls_length);
 474                         return(ls_end);
 475                     }
 476                     ls_length-=tlv_length;
 477                     TCHECK2(*tptr, tlv_length);
 478                     switch(tlv_type) {
 479
 480                     case LS_OPAQUE_RI_TLV_CAP:
 481                         if (tlv_length != 4) {
 482                             printf("\n\t    Bogus length %u != 4", tlv_length);
 483                             return(ls_end);
 484                         }
 485                         printf("Capabilities: %s",
 486                                bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr)));
 487                         break;
 488                     default:
 489                         if (vflag <= 1) {
 490                             if(!print_unknown_data(tptr,"\n\t      ",tlv_length))
 491                                 return(ls_end);
 492                         }
 493                         break;
 494
 495                     }
 496                     tptr+=tlv_length;
 497                 }
 498
 499                 break;
 500             case LS_OPAQUE_TYPE_GRACE:
 501                 tptr = (u_int8_t *)(&lsap->lsa_un.un_grace_tlv.type);
 502
 503                 while (ls_length != 0) {
 504                     TCHECK2(*tptr, 4);
 505                     if (ls_length < 4) {
 506                         printf("\n\t    Remaining LS length %u < 4", ls_length);
 507                         return(ls_end);
 508                     }
 509                     tlv_type = EXTRACT_16BITS(tptr);
 510                     tlv_length = EXTRACT_16BITS(tptr+2);
 511                     tptr+=4;
 512                     ls_length-=4;
 513
 514                     printf("\n\t    %s TLV (%u), length: %u, value: ",
 515                            tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
 516                            tlv_type,
 517                            tlv_length);
 518
 519                     if (tlv_length > ls_length) {
 520                         printf("\n\t    Bogus length %u > %u", tlv_length,
 521                             ls_length);
 522                         return(ls_end);
 523                     }
 524                     ls_length-=tlv_length;
 525                     TCHECK2(*tptr, tlv_length);
 526                     switch(tlv_type) {
 527
 528                     case LS_OPAQUE_GRACE_TLV_PERIOD:
 529                         if (tlv_length != 4) {
 530                             printf("\n\t    Bogus length %u != 4", tlv_length);
 531                             return(ls_end);
 532                         }
 533                         printf("%us",EXTRACT_32BITS(tptr));
 534                         break;
 535                     case LS_OPAQUE_GRACE_TLV_REASON:
 536                         if (tlv_length != 1) {
 537                             printf("\n\t    Bogus length %u != 1", tlv_length);
 538                             return(ls_end);
 539                         }
 540                         printf("%s (%u)",
 541                                tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr),
 542                                *tptr);
 543                         break;
 544                     case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
 545                         if (tlv_length != 4) {
 546                             printf("\n\t    Bogus length %u != 4", tlv_length);
 547                             return(ls_end);
 548                         }
 549                         printf("%s", ipaddr_string(tptr));
 550                         break;
 551                     default:
 552                         if (vflag <= 1) {
 553                             if(!print_unknown_data(tptr,"\n\t      ",tlv_length))
 554                                 return(ls_end);
 555                         }
 556                         break;
 557
 558                     }
 559                     tptr+=tlv_length;
 560                 }
 561
 562                 break;
 563             case LS_OPAQUE_TYPE_TE:
 564                 tptr = (u_int8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type);
 565
 566                 while (ls_length != 0) {
 567                     TCHECK2(*tptr, 4);
 568                     if (ls_length < 4) {
 569                         printf("\n\t    Remaining LS length %u < 4", ls_length);
 570                         return(ls_end);
 571                     }
 572                     tlv_type = EXTRACT_16BITS(tptr);
 573                     tlv_length = EXTRACT_16BITS(tptr+2);
 574                     tptr+=4;
 575                     ls_length-=4;
 576
 577                     printf("\n\t    %s TLV (%u), length: %u",
 578                            tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
 579                            tlv_type,
 580                            tlv_length);
 581
 582                     if (tlv_length > ls_length) {
 583                         printf("\n\t    Bogus length %u > %u", tlv_length,
 584                             ls_length);
 585                         return(ls_end);
 586                     }
 587                     ls_length-=tlv_length;
 588                     switch(tlv_type) {
 589                     case LS_OPAQUE_TE_TLV_LINK:
 590                         while (tlv_length != 0) {
 591                             if (tlv_length < 4) {
 592                                 printf("\n\t    Remaining TLV length %u < 4",
 593                                     tlv_length);
 594                                 return(ls_end);
 595                             }
 596                             TCHECK2(*tptr, 4);
 597                             subtlv_type = EXTRACT_16BITS(tptr);
 598                             subtlv_length = EXTRACT_16BITS(tptr+2);
 599                             tptr+=4;
 600                             tlv_length-=4;
 601
 602                             printf("\n\t      %s subTLV (%u), length: %u",
 603                                    tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
 604                                    subtlv_type,
 605                                    subtlv_length);
 606
 607                             TCHECK2(*tptr, subtlv_length);
 608                             switch(subtlv_type) {
 609                             case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
 610                                 printf(", 0x%08x", EXTRACT_32BITS(tptr));
 611                                 break;
 612                             case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
 613                             case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
 614                                 printf(", %s (0x%08x)",
 615                                        ipaddr_string(tptr),
 616                                        EXTRACT_32BITS(tptr));
 617                                 if (subtlv_length == 8) /* draft-ietf-ccamp-ospf-gmpls-extensions */
 618                                     printf(", %s (0x%08x)",
 619                                            ipaddr_string(tptr+4),
 620                                            EXTRACT_32BITS(tptr+4));
 621                                 break;
 622                             case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
 623                             case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
 624                                 printf(", %s", ipaddr_string(tptr));
 625                                 break;
 626                             case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
 627                             case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
 628                                 bw.i = EXTRACT_32BITS(tptr);
 629                                 printf(", %.3f Mbps", bw.f*8/1000000 );
 630                                 break;
 631                             case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
 632                                 for (priority_level = 0; priority_level < 8; priority_level++) {
 633                                     bw.i = EXTRACT_32BITS(tptr+priority_level*4);
 634                                     printf("\n\t\tpriority level %d: %.3f Mbps",
 635                                            priority_level,
 636                                            bw.f*8/1000000 );
 637                                 }
 638                                 break;
 639                             case LS_OPAQUE_TE_LINK_SUBTLV_DIFFSERV_TE:
 640                                 printf("\n\t\tBandwidth Constraints Model ID: %s (%u)",
 641                                        tok2str(diffserv_te_bc_values, "unknown", *tptr),
 642                                        *tptr);
 643                                 /* decode BCs until the subTLV ends */
 644                                 for (bandwidth_constraint = 0; bandwidth_constraint < (subtlv_length-4)/4; bandwidth_constraint++) {
 645                                     bw.i = EXTRACT_32BITS(tptr+4+bandwidth_constraint*4);
 646                                     printf("\n\t\t  Bandwidth constraint %d: %.3f Mbps",
 647                                            bandwidth_constraint,
 648                                            bw.f*8/1000000 );
 649                                 }
 650                                 break;
 651                             case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
 652                                 printf(", Metric %u", EXTRACT_32BITS(tptr));
 653                                 break;
 654                             case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
 655                                 printf(", %s, Priority %u",
 656                                        bittok2str(gmpls_link_prot_values, "none", *tptr),
 657                                        *(tptr+1));
 658                                 break;
 659                             case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
 660                                 printf("\n\t\tInterface Switching Capability: %s",
 661                                        tok2str(gmpls_switch_cap_values, "Unknown", *(tptr)));
 662                                 printf("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
 663                                        tok2str(gmpls_encoding_values, "Unknown", *(tptr+1)));
 664                                 for (priority_level = 0; priority_level < 8; priority_level++) {
 665                                     bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4));
 666                                     printf("\n\t\t  priority level %d: %.3f Mbps",
 667                                            priority_level,
 668                                            bw.f*8/1000000 );
 669                                 }
 670                                 break;
 671                             case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
 672                                 printf(", %s (%u)",
 673                                        tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr),
 674                                        *tptr);
 675                                 break;
 676
 677                             case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
 678                                 count_srlg = subtlv_length / 4;
 679                                 if (count_srlg != 0)
 680                                      printf("\n\t\t  Shared risk group: ");
 681                                 while (count_srlg > 0) {
 682                                         bw.i = EXTRACT_32BITS(tptr);
 683                                         printf("%d",bw.i);
 684                                         tptr+=4;
 685                                         count_srlg--;
 686                                         if (count_srlg > 0)
 687                                             printf(", ");
 688                                 }
 689                                 break;
 690
 691                             default:
 692                                 if (vflag <= 1) {
 693                                     if(!print_unknown_data(tptr,"\n\t\t",subtlv_length))
 694                                         return(ls_end);
 695                                 }
 696                                 break;
 697                             }
 698                             /* in OSPF everything has to be 32-bit aligned, including TLVs */
 699                             if (subtlv_length%4 != 0)
 700                                 subtlv_length+=4-(subtlv_length%4);
 701
 702                             tlv_length-=subtlv_length;
 703                             tptr+=subtlv_length;
 704
 705                         }
 706                         break;
 707
 708                     case LS_OPAQUE_TE_TLV_ROUTER:
 709                         if (tlv_length < 4) {
 710                             printf("\n\t    TLV length %u < 4", tlv_length);
 711                             return(ls_end);
 712                         }
 713                         TCHECK2(*tptr, 4);
 714                         printf(", %s", ipaddr_string(tptr));
 715                         break;
 716
 717                     default:
 718                         if (vflag <= 1) {
 719                             if(!print_unknown_data(tptr,"\n\t      ",tlv_length))
 720                                 return(ls_end);
 721                         }
 722                         break;
 723                     }
 724                     tptr+=tlv_length;
 725                 }
 726                 break;
 727             }
 728             break;
 729         default:
 730             if (vflag <= 1) {
 731                 if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown,
 732                                        "\n\t    ", ls_length))
 733                     return(ls_end);
 734             }
 735             break;
 736         }
 737
 738         /* do we want to see an additionally hexdump ? */
 739         if (vflag> 1)
 740             if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown,
 741                                    "\n\t    ", ls_length)) {
 742                 return(ls_end);
 743             }
 744
 745         return (ls_end);
 746 trunc:
 747         return (NULL);
 748 }
 749
 750 static int
 751 ospf_decode_v2(register const struct ospfhdr *op,
 752     register const u_char *dataend)
 753 {
 754         register const struct in_addr *ap;
 755         register const struct lsr *lsrp;
 756         register const struct lsa_hdr *lshp;
 757         register const struct lsa *lsap;
 758         register u_int32_t lsa_count,lsa_count_max;
 759
 760         switch (op->ospf_type) {
 761
 762         case OSPF_TYPE_UMD:
 763                 /*
 764                  * Rob Coltun's special monitoring packets;
 765                  * do nothing
 766                  */
 767                 break;
 768
 769         case OSPF_TYPE_HELLO:
 770                 printf("\n\tOptions: [%s]",
 771                        bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options));
 772
 773                 TCHECK(op->ospf_hello.hello_deadint);
 774                 printf("\n\t  Hello Timer: %us, Dead Timer %us, Mask: %s, Priority: %u",
 775                        EXTRACT_16BITS(&op->ospf_hello.hello_helloint),
 776                        EXTRACT_32BITS(&op->ospf_hello.hello_deadint),
 777                        ipaddr_string(&op->ospf_hello.hello_mask),
 778                        op->ospf_hello.hello_priority);
 779
 780                 TCHECK(op->ospf_hello.hello_dr);
 781                 if (op->ospf_hello.hello_dr.s_addr != 0)
 782                         printf("\n\t  Designated Router %s",
 783                             ipaddr_string(&op->ospf_hello.hello_dr));
 784
 785                 TCHECK(op->ospf_hello.hello_bdr);
 786                 if (op->ospf_hello.hello_bdr.s_addr != 0)
 787                         printf(", Backup Designated Router %s",
 788                             ipaddr_string(&op->ospf_hello.hello_bdr));
 789
 790                 ap = op->ospf_hello.hello_neighbor;
 791                 if ((u_char *)ap < dataend)
 792                         printf("\n\t  Neighbor List:");
 793                 while ((u_char *)ap < dataend) {
 794                         TCHECK(*ap);
 795                         printf("\n\t    %s", ipaddr_string(ap));
 796                         ++ap;
 797                 }
 798                 break;  /* HELLO */
 799
 800         case OSPF_TYPE_DD:
 801                 TCHECK(op->ospf_db.db_options);
 802                 printf("\n\tOptions: [%s]",
 803                        bittok2str(ospf_option_values,"none",op->ospf_db.db_options));
 804                 TCHECK(op->ospf_db.db_flags);
 805                 printf(", DD Flags: [%s]",
 806                        bittok2str(ospf_dd_flag_values,"none",op->ospf_db.db_flags));
 807
 808                 if (vflag) {
 809                         /* Print all the LS adv's */
 810                         lshp = op->ospf_db.db_lshdr;
 811                         while (ospf_print_lshdr(lshp) != -1) {
 812                                 ++lshp;
 813                         }
 814                 }
 815                 break;
 816
 817         case OSPF_TYPE_LS_REQ:
 818                 lsrp = op->ospf_lsr;
 819                 while ((u_char *)lsrp < dataend) {
 820                     TCHECK(*lsrp);
 821
 822                     printf("\n\t  Advertising Router: %s, %s LSA (%u)",
 823                            ipaddr_string(&lsrp->ls_router),
 824                            tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)),
 825                            EXTRACT_32BITS(&lsrp->ls_type));
 826
 827                     switch (EXTRACT_32BITS(lsrp->ls_type)) {
 828                         /* the LSA header for opaque LSAs was slightly changed */
 829                     case LS_TYPE_OPAQUE_LL:
 830                     case LS_TYPE_OPAQUE_AL:
 831                     case LS_TYPE_OPAQUE_DW:
 832                         printf(", Opaque-Type: %s LSA (%u), Opaque-ID: %u",
 833                                tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type),
 834                                lsrp->un_ls_stateid.opaque_field.opaque_type,
 835                                EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id));
 836                         break;
 837                     default:
 838                         printf(", LSA-ID: %s",
 839                                ipaddr_string(&lsrp->un_ls_stateid.ls_stateid));
 840                         break;
 841                     }
 842
 843                     ++lsrp;
 844                 }
 845                 break;
 846
 847         case OSPF_TYPE_LS_UPDATE:
 848                 lsap = op->ospf_lsu.lsu_lsa;
 849                 TCHECK(op->ospf_lsu.lsu_count);
 850                 lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count);
 851                 printf(", %d LSA%s",lsa_count_max, lsa_count_max > 1 ? "s" : "");
 852                 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) {
 853                     printf("\n\t  LSA #%u",lsa_count);
 854                         lsap = (const struct lsa *)ospf_print_lsa(lsap);
 855                         if (lsap == NULL)
 856                                 goto trunc;
 857                 }
 858                 break;
 859
 860         case OSPF_TYPE_LS_ACK:
 861                 lshp = op->ospf_lsa.lsa_lshdr;
 862                 while (ospf_print_lshdr(lshp) != -1) {
 863                     ++lshp;
 864                 }
 865                 break;
 866
 867         default:
 868                 printf("v2 type (%d)", op->ospf_type);
 869                 break;
 870         }
 871         return (0);
 872 trunc:
 873         return (1);
 874 }
 875
 876 void
 877 ospf_print(register const u_char *bp, register u_int length,
 878     const u_char *bp2 _U_)
 879 {
 880         register const struct ospfhdr *op;
 881         register const u_char *dataend;
 882         register const char *cp;
 883
 884         op = (struct ospfhdr *)bp;
 885
 886         /* XXX Before we do anything else, strip off the MD5 trailer */
 887         TCHECK(op->ospf_authtype);
 888         if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) {
 889                 length -= OSPF_AUTH_MD5_LEN;
 890                 snapend -= OSPF_AUTH_MD5_LEN;
 891         }
 892
 893         /* If the type is valid translate it, or just print the type */
 894         /* value.  If it's not valid, say so and return */
 895         TCHECK(op->ospf_type);
 896         cp = tok2str(type2str, "unknown LS-type", op->ospf_type);
 897         printf("OSPFv%u, %s, length: %u",
 898                op->ospf_version,
 899                cp,
 900                length);
 901         if (*cp == 'u')
 902                 return;
 903
 904         if(!vflag) /* non verbose - so lets bail out here */
 905                 return;
 906
 907         TCHECK(op->ospf_len);
 908         if (length != EXTRACT_16BITS(&op->ospf_len)) {
 909                 printf(" [len %d]", EXTRACT_16BITS(&op->ospf_len));
 910                 return;
 911         }
 912         dataend = bp + length;
 913
 914         TCHECK(op->ospf_routerid);
 915         printf("\n\tRouter-ID: %s", ipaddr_string(&op->ospf_routerid));
 916
 917         TCHECK(op->ospf_areaid);
 918         if (op->ospf_areaid.s_addr != 0)
 919                 printf(", Area %s", ipaddr_string(&op->ospf_areaid));
 920         else
 921                 printf(", Backbone Area");
 922
 923         if (vflag) {
 924                 /* Print authentication data (should we really do this?) */
 925                 TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata));
 926
 927                 printf(", Authentication Type: %s (%u)",
 928                        tok2str(ospf_authtype_values,"unknown",EXTRACT_16BITS(&op->ospf_authtype)),
 929                        EXTRACT_16BITS(&op->ospf_authtype));
 930
 931                 switch (EXTRACT_16BITS(&op->ospf_authtype)) {
 932
 933                 case OSPF_AUTH_NONE:
 934                         break;
 935
 936                 case OSPF_AUTH_SIMPLE:
 937                         if (fn_printn(op->ospf_authdata,
 938                             sizeof(op->ospf_authdata), snapend)) {
 939                                 printf("\"");
 940                                 goto trunc;
 941                         }
 942                         printf("\"");
 943                         break;
 944
 945                 case OSPF_AUTH_MD5:
 946                         printf("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x",
 947                                *((op->ospf_authdata)+2),
 948                                *((op->ospf_authdata)+3),
 949                                EXTRACT_32BITS((op->ospf_authdata)+4));
 950                         break;
 951
 952                 default:
 953                         return;
 954                 }
 955         }
 956         /* Do rest according to version.         */
 957         switch (op->ospf_version) {
 958
 959         case 2:
 960                 /* ospf version 2 */
 961                 if (ospf_decode_v2(op, dataend))
 962                         goto trunc;
 963                 break;
 964
 965         default:
 966                 printf(" ospf [version %d]", op->ospf_version);
 967                 break;
 968         }                       /* end switch on version */
 969
 970         return;
 971 trunc:
 972         fputs(tstr, stdout);
 973 }
 974 #endif