contrib/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 #define NETDISSECT_REWORKED
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include <tcpdump-stdinc.h>
  30
  31 #include "interface.h"
  32 #include "addrtoname.h"
  33 #include "extract.h"
  34 #include "gmpls.h"
  35
  36 #include "ospf.h"
  37
  38 static const char tstr[] = " [|ospf2]";
  39
  40 static const struct tok ospf_option_values[] = {
  41         { OSPF_OPTION_T,        "MultiTopology" }, /* draft-ietf-ospf-mt-09 */
  42         { OSPF_OPTION_E,        "External" },
  43         { OSPF_OPTION_MC,       "Multicast" },
  44         { OSPF_OPTION_NP,       "NSSA" },
  45         { OSPF_OPTION_L,        "LLS" },
  46         { OSPF_OPTION_DC,       "Demand Circuit" },
  47         { OSPF_OPTION_O,        "Opaque" },
  48         { OSPF_OPTION_DN,       "Up/Down" },
  49         { 0,                    NULL }
  50 };
  51
  52 static const struct tok ospf_authtype_values[] = {
  53         { OSPF_AUTH_NONE,       "none" },
  54         { OSPF_AUTH_SIMPLE,     "simple" },
  55         { OSPF_AUTH_MD5,        "MD5" },
  56         { 0,                    NULL }
  57 };
  58
  59 static const struct tok ospf_rla_flag_values[] = {
  60         { RLA_FLAG_B,           "ABR" },
  61         { RLA_FLAG_E,           "ASBR" },
  62         { RLA_FLAG_W1,          "Virtual" },
  63         { RLA_FLAG_W2,          "W2" },
  64         { 0,                    NULL }
  65 };
  66
  67 static const struct tok type2str[] = {
  68         { OSPF_TYPE_UMD,        "UMD" },
  69         { OSPF_TYPE_HELLO,      "Hello" },
  70         { OSPF_TYPE_DD,         "Database Description" },
  71         { OSPF_TYPE_LS_REQ,     "LS-Request" },
  72         { OSPF_TYPE_LS_UPDATE,  "LS-Update" },
  73         { OSPF_TYPE_LS_ACK,     "LS-Ack" },
  74         { 0,                    NULL }
  75 };
  76
  77 static const struct tok lsa_values[] = {
  78         { LS_TYPE_ROUTER,       "Router" },
  79         { LS_TYPE_NETWORK,      "Network" },
  80         { LS_TYPE_SUM_IP,       "Summary" },
  81         { LS_TYPE_SUM_ABR,      "ASBR Summary" },
  82         { LS_TYPE_ASE,          "External" },
  83         { LS_TYPE_GROUP,        "Multicast Group" },
  84         { LS_TYPE_NSSA,         "NSSA" },
  85         { LS_TYPE_OPAQUE_LL,    "Link Local Opaque" },
  86         { LS_TYPE_OPAQUE_AL,    "Area Local Opaque" },
  87         { LS_TYPE_OPAQUE_DW,    "Domain Wide Opaque" },
  88         { 0,                    NULL }
  89 };
  90
  91 static const struct tok ospf_dd_flag_values[] = {
  92         { OSPF_DB_INIT,         "Init" },
  93         { OSPF_DB_MORE,         "More" },
  94         { OSPF_DB_MASTER,       "Master" },
  95     { OSPF_DB_RESYNC,   "OOBResync" },
  96         { 0,                    NULL }
  97 };
  98
  99 static const struct tok lsa_opaque_values[] = {
 100         { LS_OPAQUE_TYPE_TE,    "Traffic Engineering" },
 101         { LS_OPAQUE_TYPE_GRACE, "Graceful restart" },
 102         { LS_OPAQUE_TYPE_RI,    "Router Information" },
 103         { 0,                    NULL }
 104 };
 105
 106 static const struct tok lsa_opaque_te_tlv_values[] = {
 107         { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" },
 108         { LS_OPAQUE_TE_TLV_LINK,   "Link" },
 109         { 0,                    NULL }
 110 };
 111
 112 static const struct tok lsa_opaque_te_link_tlv_subtlv_values[] = {
 113         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE,            "Link Type" },
 114         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID,              "Link ID" },
 115         { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP,             "Local Interface IP address" },
 116         { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP,            "Remote Interface IP address" },
 117         { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC,            "Traffic Engineering Metric" },
 118         { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW,               "Maximum Bandwidth" },
 119         { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW,           "Maximum Reservable Bandwidth" },
 120         { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW,             "Unreserved Bandwidth" },
 121         { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP,          "Administrative Group" },
 122         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" },
 123         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" },
 124         { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR,    "Interface Switching Capability" },
 125         { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP,    "Shared Risk Link Group" },
 126         { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS,       "Bandwidth Constraints" },
 127         { 0,                    NULL }
 128 };
 129
 130 static const struct tok lsa_opaque_grace_tlv_values[] = {
 131         { LS_OPAQUE_GRACE_TLV_PERIOD,             "Grace Period" },
 132         { LS_OPAQUE_GRACE_TLV_REASON,             "Graceful restart Reason" },
 133         { LS_OPAQUE_GRACE_TLV_INT_ADDRESS,        "IPv4 interface address" },
 134         { 0,                    NULL }
 135 };
 136
 137 static const struct tok lsa_opaque_grace_tlv_reason_values[] = {
 138         { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN,     "Unknown" },
 139         { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART,  "Software Restart" },
 140         { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE,  "Software Reload/Upgrade" },
 141         { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH,   "Control Processor Switch" },
 142         { 0,                    NULL }
 143 };
 144
 145 static const struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = {
 146         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" },
 147         { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA,  "Multi-Access" },
 148         { 0,                    NULL }
 149 };
 150
 151 static const struct tok lsa_opaque_ri_tlv_values[] = {
 152         { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" },
 153         { 0,                    NULL }
 154 };
 155
 156 static const struct tok lsa_opaque_ri_tlv_cap_values[] = {
 157         { 1, "Reserved" },
 158         { 2, "Reserved" },
 159         { 4, "Reserved" },
 160         { 8, "Reserved" },
 161         { 16, "graceful restart capable" },
 162         { 32, "graceful restart helper" },
 163         { 64, "Stub router support" },
 164         { 128, "Traffic engineering" },
 165         { 256, "p2p over LAN" },
 166         { 512, "path computation server" },
 167         { 0,                    NULL }
 168 };
 169
 170 static const struct tok ospf_lls_tlv_values[] = {
 171         { OSPF_LLS_EO,  "Extended Options" },
 172         { OSPF_LLS_MD5, "MD5 Authentication" },
 173         { 0,    NULL }
 174 };
 175
 176 static const struct tok ospf_lls_eo_options[] = {
 177         { OSPF_LLS_EO_LR,       "LSDB resync" },
 178         { OSPF_LLS_EO_RS,       "Restart" },
 179         { 0,    NULL }
 180 };
 181
 182 int
 183 ospf_print_grace_lsa(netdissect_options *ndo,
 184                      const uint8_t *tptr, u_int ls_length)
 185 {
 186     u_int tlv_type, tlv_length;
 187
 188
 189     while (ls_length > 0) {
 190         ND_TCHECK2(*tptr, 4);
 191         if (ls_length < 4) {
 192             ND_PRINT((ndo, "\n\t    Remaining LS length %u < 4", ls_length));
 193             return -1;
 194         }
 195         tlv_type = EXTRACT_16BITS(tptr);
 196         tlv_length = EXTRACT_16BITS(tptr+2);
 197         tptr+=4;
 198         ls_length-=4;
 199
 200         ND_PRINT((ndo, "\n\t    %s TLV (%u), length %u, value: ",
 201                tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type),
 202                tlv_type,
 203                tlv_length));
 204
 205         if (tlv_length > ls_length) {
 206             ND_PRINT((ndo, "\n\t    Bogus length %u > %u", tlv_length,
 207                    ls_length));
 208             return -1;
 209         }
 210
 211         /* Infinite loop protection. */
 212         if (tlv_type == 0 || tlv_length ==0) {
 213             return -1;
 214         }
 215
 216         ND_TCHECK2(*tptr, tlv_length);
 217         switch(tlv_type) {
 218
 219         case LS_OPAQUE_GRACE_TLV_PERIOD:
 220             if (tlv_length != 4) {
 221                 ND_PRINT((ndo, "\n\t    Bogus length %u != 4", tlv_length));
 222                 return -1;
 223             }
 224             ND_PRINT((ndo, "%us", EXTRACT_32BITS(tptr)));
 225             break;
 226
 227         case LS_OPAQUE_GRACE_TLV_REASON:
 228             if (tlv_length != 1) {
 229                 ND_PRINT((ndo, "\n\t    Bogus length %u != 1", tlv_length));
 230                 return -1;
 231             }
 232             ND_PRINT((ndo, "%s (%u)",
 233                    tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr),
 234                    *tptr));
 235             break;
 236
 237         case LS_OPAQUE_GRACE_TLV_INT_ADDRESS:
 238             if (tlv_length != 4) {
 239                 ND_PRINT((ndo, "\n\t    Bogus length %u != 4", tlv_length));
 240                 return -1;
 241             }
 242             ND_PRINT((ndo, "%s", ipaddr_string(ndo, tptr)));
 243             break;
 244
 245         default:
 246             if (ndo->ndo_vflag <= 1) {
 247                 if (!print_unknown_data(ndo, tptr, "\n\t      ", tlv_length))
 248                     return -1;
 249             }
 250             break;
 251
 252         }
 253         /* in OSPF everything has to be 32-bit aligned, including TLVs */
 254         if (tlv_length%4 != 0)
 255             tlv_length+=4-(tlv_length%4);
 256         ls_length-=tlv_length;
 257         tptr+=tlv_length;
 258     }
 259
 260     return 0;
 261 trunc:
 262     return -1;
 263 }
 264
 265 int
 266 ospf_print_te_lsa(netdissect_options *ndo,
 267                   const uint8_t *tptr, u_int ls_length)
 268 {
 269     u_int tlv_type, tlv_length, subtlv_type, subtlv_length;
 270     u_int priority_level, te_class, count_srlg;
 271     union { /* int to float conversion buffer for several subTLVs */
 272         float f;
 273         uint32_t i;
 274     } bw;
 275
 276     while (ls_length != 0) {
 277         ND_TCHECK2(*tptr, 4);
 278         if (ls_length < 4) {
 279             ND_PRINT((ndo, "\n\t    Remaining LS length %u < 4", ls_length));
 280             return -1;
 281         }
 282         tlv_type = EXTRACT_16BITS(tptr);
 283         tlv_length = EXTRACT_16BITS(tptr+2);
 284         tptr+=4;
 285         ls_length-=4;
 286
 287         ND_PRINT((ndo, "\n\t    %s TLV (%u), length: %u",
 288                tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type),
 289                tlv_type,
 290                tlv_length));
 291
 292         if (tlv_length > ls_length) {
 293             ND_PRINT((ndo, "\n\t    Bogus length %u > %u", tlv_length,
 294                    ls_length));
 295             return -1;
 296         }
 297
 298         /* Infinite loop protection. */
 299         if (tlv_type == 0 || tlv_length ==0) {
 300             return -1;
 301         }
 302
 303         switch(tlv_type) {
 304         case LS_OPAQUE_TE_TLV_LINK:
 305             while (tlv_length >= sizeof(subtlv_type) + sizeof(subtlv_length)) {
 306                 if (tlv_length < 4) {
 307                     ND_PRINT((ndo, "\n\t    Remaining TLV length %u < 4",
 308                            tlv_length));
 309                     return -1;
 310                 }
 311                 ND_TCHECK2(*tptr, 4);
 312                 subtlv_type = EXTRACT_16BITS(tptr);
 313                 subtlv_length = EXTRACT_16BITS(tptr+2);
 314                 tptr+=4;
 315                 tlv_length-=4;
 316
 317                 ND_PRINT((ndo, "\n\t      %s subTLV (%u), length: %u",
 318                        tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
 319                        subtlv_type,
 320                        subtlv_length));
 321
 322                 ND_TCHECK2(*tptr, subtlv_length);
 323                 switch(subtlv_type) {
 324                 case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
 325                     ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr)));
 326                     break;
 327                 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
 328                 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
 329                     ND_PRINT((ndo, ", %s (0x%08x)",
 330                            ipaddr_string(ndo, tptr),
 331                            EXTRACT_32BITS(tptr)));
 332                     if (subtlv_length == 8) /* rfc4203 */
 333                         ND_PRINT((ndo, ", %s (0x%08x)",
 334                                ipaddr_string(ndo, tptr+4),
 335                                EXTRACT_32BITS(tptr + 4)));
 336                     break;
 337                 case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
 338                 case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
 339                     ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
 340                     break;
 341                 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
 342                 case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
 343                     bw.i = EXTRACT_32BITS(tptr);
 344                     ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000));
 345                     break;
 346                 case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
 347                     for (te_class = 0; te_class < 8; te_class++) {
 348                         bw.i = EXTRACT_32BITS(tptr+te_class*4);
 349                         ND_PRINT((ndo, "\n\t\tTE-Class %u: %.3f Mbps",
 350                                te_class,
 351                                bw.f * 8 / 1000000));
 352                     }
 353                     break;
 354                 case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
 355                     ND_PRINT((ndo, "\n\t\tBandwidth Constraints Model ID: %s (%u)",
 356                            tok2str(diffserv_te_bc_values, "unknown", *tptr),
 357                            *tptr));
 358                     /* decode BCs until the subTLV ends */
 359                     for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
 360                         bw.i = EXTRACT_32BITS(tptr+4+te_class*4);
 361                         ND_PRINT((ndo, "\n\t\t  Bandwidth constraint CT%u: %.3f Mbps",
 362                                te_class,
 363                                bw.f * 8 / 1000000));
 364                     }
 365                     break;
 366                 case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
 367                     ND_PRINT((ndo, ", Metric %u", EXTRACT_32BITS(tptr)));
 368                     break;
 369                 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
 370                     ND_PRINT((ndo, ", %s, Priority %u",
 371                            bittok2str(gmpls_link_prot_values, "none", *tptr),
 372                            *(tptr + 1)));
 373                     break;
 374                 case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
 375                     ND_PRINT((ndo, "\n\t\tInterface Switching Capability: %s",
 376                            tok2str(gmpls_switch_cap_values, "Unknown", *(tptr))));
 377                     ND_PRINT((ndo, "\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
 378                            tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1))));
 379                     for (priority_level = 0; priority_level < 8; priority_level++) {
 380                         bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4));
 381                         ND_PRINT((ndo, "\n\t\t  priority level %d: %.3f Mbps",
 382                                priority_level,
 383                                bw.f * 8 / 1000000));
 384                     }
 385                     break;
 386                 case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
 387                     ND_PRINT((ndo, ", %s (%u)",
 388                            tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr),
 389                            *tptr));
 390                     break;
 391
 392                 case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
 393                     count_srlg = subtlv_length / 4;
 394                     if (count_srlg != 0)
 395                         ND_PRINT((ndo, "\n\t\t  Shared risk group: "));
 396                     while (count_srlg > 0) {
 397                         bw.i = EXTRACT_32BITS(tptr);
 398                         ND_PRINT((ndo, "%d", bw.i));
 399                         tptr+=4;
 400                         count_srlg--;
 401                         if (count_srlg > 0)
 402                             ND_PRINT((ndo, ", "));
 403                     }
 404                     break;
 405
 406                 default:
 407                     if (ndo->ndo_vflag <= 1) {
 408                         if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length))
 409                             return -1;
 410                     }
 411                     break;
 412                 }
 413                 /* in OSPF everything has to be 32-bit aligned, including subTLVs */
 414                 if (subtlv_length%4 != 0)
 415                     subtlv_length+=4-(subtlv_length%4);
 416
 417                 tlv_length-=subtlv_length;
 418                 tptr+=subtlv_length;
 419
 420             }
 421             break;
 422
 423         case LS_OPAQUE_TE_TLV_ROUTER:
 424             if (tlv_length < 4) {
 425                 ND_PRINT((ndo, "\n\t    TLV length %u < 4", tlv_length));
 426                 return -1;
 427             }
 428             ND_TCHECK2(*tptr, 4);
 429             ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
 430             break;
 431
 432         default:
 433             if (ndo->ndo_vflag <= 1) {
 434                 if (!print_unknown_data(ndo, tptr, "\n\t      ", tlv_length))
 435                     return -1;
 436             }
 437             break;
 438         }
 439         /* in OSPF everything has to be 32-bit aligned, including TLVs */
 440         if (tlv_length%4 != 0)
 441             tlv_length+=4-(tlv_length%4);
 442         ls_length-=tlv_length;
 443         tptr+=tlv_length;
 444     }
 445     return 0;
 446 trunc:
 447     return -1;
 448 }
 449
 450 static int
 451 ospf_print_lshdr(netdissect_options *ndo,
 452                  register const struct lsa_hdr *lshp)
 453 {
 454         u_int ls_length;
 455
 456         ND_TCHECK(lshp->ls_length);
 457         ls_length = EXTRACT_16BITS(&lshp->ls_length);
 458         if (ls_length < sizeof(struct lsa_hdr)) {
 459                 ND_PRINT((ndo, "\n\t    Bogus length %u < header (%lu)", ls_length,
 460                     (unsigned long)sizeof(struct lsa_hdr)));
 461                 return(-1);
 462         }
 463
 464         ND_TCHECK(lshp->ls_seq); /* XXX - ls_length check checked this */
 465         ND_PRINT((ndo, "\n\t  Advertising Router %s, seq 0x%08x, age %us, length %u",
 466                   ipaddr_string(ndo, &lshp->ls_router),
 467                   EXTRACT_32BITS(&lshp->ls_seq),
 468                   EXTRACT_16BITS(&lshp->ls_age),
 469                   ls_length - (u_int)sizeof(struct lsa_hdr)));
 470
 471         ND_TCHECK(lshp->ls_type); /* XXX - ls_length check checked this */
 472         switch (lshp->ls_type) {
 473         /* the LSA header for opaque LSAs was slightly changed */
 474         case LS_TYPE_OPAQUE_LL:
 475         case LS_TYPE_OPAQUE_AL:
 476         case LS_TYPE_OPAQUE_DW:
 477             ND_PRINT((ndo, "\n\t    %s LSA (%d), Opaque-Type %s LSA (%u), Opaque-ID %u",
 478                    tok2str(lsa_values,"unknown",lshp->ls_type),
 479                    lshp->ls_type,
 480
 481                    tok2str(lsa_opaque_values,
 482                            "unknown",
 483                            *(&lshp->un_lsa_id.opaque_field.opaque_type)),
 484                    *(&lshp->un_lsa_id.opaque_field.opaque_type),
 485                    EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id)
 486
 487                    ));
 488             break;
 489
 490         /* all other LSA types use regular style LSA headers */
 491         default:
 492             ND_PRINT((ndo, "\n\t    %s LSA (%d), LSA-ID: %s",
 493                    tok2str(lsa_values,"unknown",lshp->ls_type),
 494                    lshp->ls_type,
 495                    ipaddr_string(ndo, &lshp->un_lsa_id.lsa_id)));
 496             break;
 497         }
 498
 499         ND_TCHECK(lshp->ls_options); /* XXX - ls_length check checked this */
 500         ND_PRINT((ndo, "\n\t    Options: [%s]", bittok2str(ospf_option_values, "none", lshp->ls_options)));
 501
 502         return (ls_length);
 503 trunc:
 504         return (-1);
 505 }
 506
 507 /* draft-ietf-ospf-mt-09 */
 508 static const struct tok ospf_topology_values[] = {
 509     { 0, "default " },
 510     { 1, "multicast " },
 511     { 2, "management " },
 512     { 0, NULL }
 513 };
 514
 515 /*
 516  * Print all the per-topology metrics.
 517  */
 518 static void
 519 ospf_print_tos_metrics(netdissect_options *ndo,
 520                        const union un_tos *tos)
 521 {
 522     int metric_count;
 523     int toscount;
 524
 525     toscount = tos->link.link_tos_count+1;
 526     metric_count = 0;
 527
 528     /*
 529      * All but the first metric contain a valid topology id.
 530      */
 531     while (toscount) {
 532         ND_PRINT((ndo, "\n\t\ttopology %s(%u), metric %u",
 533                tok2str(ospf_topology_values, "",
 534                        metric_count ? tos->metrics.tos_type : 0),
 535                metric_count ? tos->metrics.tos_type : 0,
 536                EXTRACT_16BITS(&tos->metrics.tos_metric)));
 537         metric_count++;
 538         tos++;
 539         toscount--;
 540     }
 541 }
 542
 543 /*
 544  * Print a single link state advertisement.  If truncated or if LSA length
 545  * field is less than the length of the LSA header, return NULl, else
 546  * return pointer to data past end of LSA.
 547  */
 548 static const uint8_t *
 549 ospf_print_lsa(netdissect_options *ndo,
 550                register const struct lsa *lsap)
 551 {
 552         register const uint8_t *ls_end;
 553         register const struct rlalink *rlp;
 554         register const struct in_addr *ap;
 555         register const struct aslametric *almp;
 556         register const struct mcla *mcp;
 557         register const uint32_t *lp;
 558         register int j, tlv_type, tlv_length, topology;
 559         register int ls_length;
 560         const uint8_t *tptr;
 561
 562         tptr = (uint8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */
 563         ls_length = ospf_print_lshdr(ndo, &lsap->ls_hdr);
 564         if (ls_length == -1)
 565                 return(NULL);
 566         ls_end = (uint8_t *)lsap + ls_length;
 567         ls_length -= sizeof(struct lsa_hdr);
 568
 569         switch (lsap->ls_hdr.ls_type) {
 570
 571         case LS_TYPE_ROUTER:
 572                 ND_TCHECK(lsap->lsa_un.un_rla.rla_flags);
 573                 ND_PRINT((ndo, "\n\t    Router LSA Options: [%s]",
 574                           bittok2str(ospf_rla_flag_values, "none", lsap->lsa_un.un_rla.rla_flags)));
 575
 576                 ND_TCHECK(lsap->lsa_un.un_rla.rla_count);
 577                 j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count);
 578                 ND_TCHECK(lsap->lsa_un.un_rla.rla_link);
 579                 rlp = lsap->lsa_un.un_rla.rla_link;
 580                 while (j--) {
 581                         ND_TCHECK(*rlp);
 582                         switch (rlp->un_tos.link.link_type) {
 583
 584                         case RLA_TYPE_VIRTUAL:
 585                                 ND_PRINT((ndo, "\n\t      Virtual Link: Neighbor Router-ID: %s, Interface Address: %s",
 586                                     ipaddr_string(ndo, &rlp->link_id),
 587                                     ipaddr_string(ndo, &rlp->link_data)));
 588                                 break;
 589
 590                         case RLA_TYPE_ROUTER:
 591                                 ND_PRINT((ndo, "\n\t      Neighbor Router-ID: %s, Interface Address: %s",
 592                                     ipaddr_string(ndo, &rlp->link_id),
 593                                     ipaddr_string(ndo, &rlp->link_data)));
 594                                 break;
 595
 596                         case RLA_TYPE_TRANSIT:
 597                                 ND_PRINT((ndo, "\n\t      Neighbor Network-ID: %s, Interface Address: %s",
 598                                     ipaddr_string(ndo, &rlp->link_id),
 599                                     ipaddr_string(ndo, &rlp->link_data)));
 600                                 break;
 601
 602                         case RLA_TYPE_STUB:
 603                                 ND_PRINT((ndo, "\n\t      Stub Network: %s, Mask: %s",
 604                                     ipaddr_string(ndo, &rlp->link_id),
 605                                     ipaddr_string(ndo, &rlp->link_data)));
 606                                 break;
 607
 608                         default:
 609                                 ND_PRINT((ndo, "\n\t      Unknown Router Link Type (%u)",
 610                                     rlp->un_tos.link.link_type));
 611                                 return (ls_end);
 612                         }
 613
 614                         ospf_print_tos_metrics(ndo, &rlp->un_tos);
 615
 616                         rlp = (struct rlalink *)((u_char *)(rlp + 1) +
 617                             ((rlp->un_tos.link.link_tos_count) * sizeof(union un_tos)));
 618                 }
 619                 break;
 620
 621         case LS_TYPE_NETWORK:
 622                 ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
 623                 ND_PRINT((ndo, "\n\t    Mask %s\n\t    Connected Routers:",
 624                     ipaddr_string(ndo, &lsap->lsa_un.un_nla.nla_mask)));
 625                 ap = lsap->lsa_un.un_nla.nla_router;
 626                 while ((u_char *)ap < ls_end) {
 627                         ND_TCHECK(*ap);
 628                         ND_PRINT((ndo, "\n\t      %s", ipaddr_string(ndo, ap)));
 629                         ++ap;
 630                 }
 631                 break;
 632
 633         case LS_TYPE_SUM_IP:
 634                 ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
 635                 ND_PRINT((ndo, "\n\t    Mask %s",
 636                     ipaddr_string(ndo, &lsap->lsa_un.un_sla.sla_mask)));
 637                 ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
 638                 lp = lsap->lsa_un.un_sla.sla_tosmetric;
 639                 while ((u_char *)lp < ls_end) {
 640                         register uint32_t ul;
 641
 642                         ND_TCHECK(*lp);
 643                         ul = EXTRACT_32BITS(lp);
 644                         topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
 645                         ND_PRINT((ndo, "\n\t\ttopology %s(%u) metric %d",
 646                                tok2str(ospf_topology_values, "", topology),
 647                                topology,
 648                                ul & SLA_MASK_METRIC));
 649                         ++lp;
 650                 }
 651                 break;
 652
 653         case LS_TYPE_SUM_ABR:
 654                 ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
 655                 lp = lsap->lsa_un.un_sla.sla_tosmetric;
 656                 while ((u_char *)lp < ls_end) {
 657                         register uint32_t ul;
 658
 659                         ND_TCHECK(*lp);
 660                         ul = EXTRACT_32BITS(lp);
 661                         topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
 662                         ND_PRINT((ndo, "\n\t\ttopology %s(%u) metric %d",
 663                                tok2str(ospf_topology_values, "", topology),
 664                                topology,
 665                                ul & SLA_MASK_METRIC));
 666                         ++lp;
 667                 }
 668                 break;
 669
 670         case LS_TYPE_ASE:
 671         case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */
 672                 ND_TCHECK(lsap->lsa_un.un_nla.nla_mask);
 673                 ND_PRINT((ndo, "\n\t    Mask %s",
 674                     ipaddr_string(ndo, &lsap->lsa_un.un_asla.asla_mask)));
 675
 676                 ND_TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
 677                 almp = lsap->lsa_un.un_asla.asla_metric;
 678                 while ((u_char *)almp < ls_end) {
 679                         register uint32_t ul;
 680
 681                         ND_TCHECK(almp->asla_tosmetric);
 682                         ul = EXTRACT_32BITS(&almp->asla_tosmetric);
 683                         topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
 684                         ND_PRINT((ndo, "\n\t\ttopology %s(%u), type %d, metric",
 685                                tok2str(ospf_topology_values, "", topology),
 686                                topology,
 687                                (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1));
 688                         if ((ul & ASLA_MASK_METRIC) == 0xffffff)
 689                                 ND_PRINT((ndo, " infinite"));
 690                         else
 691                                 ND_PRINT((ndo, " %d", (ul & ASLA_MASK_METRIC)));
 692
 693                         ND_TCHECK(almp->asla_forward);
 694                         if (almp->asla_forward.s_addr) {
 695                                 ND_PRINT((ndo, ", forward %s", ipaddr_string(ndo, &almp->asla_forward)));
 696                         }
 697                         ND_TCHECK(almp->asla_tag);
 698                         if (almp->asla_tag.s_addr) {
 699                                 ND_PRINT((ndo, ", tag %s", ipaddr_string(ndo, &almp->asla_tag)));
 700                         }
 701                         ++almp;
 702                 }
 703                 break;
 704
 705         case LS_TYPE_GROUP:
 706                 /* Multicast extensions as of 23 July 1991 */
 707                 mcp = lsap->lsa_un.un_mcla;
 708                 while ((u_char *)mcp < ls_end) {
 709                         ND_TCHECK(mcp->mcla_vid);
 710                         switch (EXTRACT_32BITS(&mcp->mcla_vtype)) {
 711
 712                         case MCLA_VERTEX_ROUTER:
 713                                 ND_PRINT((ndo, "\n\t    Router Router-ID %s",
 714                                     ipaddr_string(ndo, &mcp->mcla_vid)));
 715                                 break;
 716
 717                         case MCLA_VERTEX_NETWORK:
 718                                 ND_PRINT((ndo, "\n\t    Network Designated Router %s",
 719                                     ipaddr_string(ndo, &mcp->mcla_vid)));
 720                                 break;
 721
 722                         default:
 723                                 ND_PRINT((ndo, "\n\t    unknown VertexType (%u)",
 724                                     EXTRACT_32BITS(&mcp->mcla_vtype)));
 725                                 break;
 726                         }
 727                 ++mcp;
 728                 }
 729                 break;
 730
 731         case LS_TYPE_OPAQUE_LL: /* fall through */
 732         case LS_TYPE_OPAQUE_AL:
 733         case LS_TYPE_OPAQUE_DW:
 734
 735             switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) {
 736             case LS_OPAQUE_TYPE_RI:
 737                 tptr = (uint8_t *)(&lsap->lsa_un.un_ri_tlv.type);
 738
 739                 while (ls_length != 0) {
 740                     ND_TCHECK2(*tptr, 4);
 741                     if (ls_length < 4) {
 742                         ND_PRINT((ndo, "\n\t    Remaining LS length %u < 4", ls_length));
 743                         return(ls_end);
 744                     }
 745                     tlv_type = EXTRACT_16BITS(tptr);
 746                     tlv_length = EXTRACT_16BITS(tptr+2);
 747                     tptr+=4;
 748                     ls_length-=4;
 749
 750                     ND_PRINT((ndo, "\n\t    %s TLV (%u), length: %u, value: ",
 751                            tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type),
 752                            tlv_type,
 753                            tlv_length));
 754
 755                     if (tlv_length > ls_length) {
 756                         ND_PRINT((ndo, "\n\t    Bogus length %u > %u", tlv_length,
 757                             ls_length));
 758                         return(ls_end);
 759                     }
 760                     ND_TCHECK2(*tptr, tlv_length);
 761                     switch(tlv_type) {
 762
 763                     case LS_OPAQUE_RI_TLV_CAP:
 764                         if (tlv_length != 4) {
 765                             ND_PRINT((ndo, "\n\t    Bogus length %u != 4", tlv_length));
 766                             return(ls_end);
 767                         }
 768                         ND_PRINT((ndo, "Capabilities: %s",
 769                                bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr))));
 770                         break;
 771                     default:
 772                         if (ndo->ndo_vflag <= 1) {
 773                             if (!print_unknown_data(ndo, tptr, "\n\t      ", tlv_length))
 774                                 return(ls_end);
 775                         }
 776                         break;
 777
 778                     }
 779                     tptr+=tlv_length;
 780                     ls_length-=tlv_length;
 781                 }
 782                 break;
 783
 784             case LS_OPAQUE_TYPE_GRACE:
 785                 if (ospf_print_grace_lsa(ndo, (uint8_t *)(&lsap->lsa_un.un_grace_tlv.type),
 786                                          ls_length) == -1) {
 787                     return(ls_end);
 788                 }
 789                 break;
 790
 791             case LS_OPAQUE_TYPE_TE:
 792                 if (ospf_print_te_lsa(ndo, (uint8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type),
 793                                       ls_length) == -1) {
 794                     return(ls_end);
 795                 }
 796                 break;
 797
 798             default:
 799                 if (ndo->ndo_vflag <= 1) {
 800                     if (!print_unknown_data(ndo, (uint8_t *)lsap->lsa_un.un_unknown,
 801                                            "\n\t    ", ls_length))
 802                         return(ls_end);
 803                 }
 804                 break;
 805             }
 806         }
 807
 808         /* do we want to see an additionally hexdump ? */
 809         if (ndo->ndo_vflag> 1)
 810             if (!print_unknown_data(ndo, (uint8_t *)lsap->lsa_un.un_unknown,
 811                                    "\n\t    ", ls_length)) {
 812                 return(ls_end);
 813             }
 814
 815         return (ls_end);
 816 trunc:
 817         return (NULL);
 818 }
 819
 820 static int
 821 ospf_decode_lls(netdissect_options *ndo,
 822                 register const struct ospfhdr *op, register u_int length)
 823 {
 824     register const u_char *dptr;
 825     register const u_char *dataend;
 826     register u_int length2;
 827     register uint16_t lls_type, lls_len;
 828     register uint32_t lls_flags;
 829
 830     switch (op->ospf_type) {
 831
 832     case OSPF_TYPE_HELLO:
 833         if (!(op->ospf_hello.hello_options & OSPF_OPTION_L))
 834             return (0);
 835         break;
 836
 837     case OSPF_TYPE_DD:
 838         if (!(op->ospf_db.db_options & OSPF_OPTION_L))
 839             return (0);
 840         break;
 841
 842     default:
 843         return (0);
 844     }
 845
 846     /* dig deeper if LLS data is available; see RFC4813 */
 847     length2 = EXTRACT_16BITS(&op->ospf_len);
 848     dptr = (u_char *)op + length2;
 849     dataend = (u_char *)op + length;
 850
 851     if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) {
 852         dptr = dptr + op->ospf_authdata[3];
 853         length2 += op->ospf_authdata[3];
 854     }
 855     if (length2 >= length) {
 856         ND_PRINT((ndo, "\n\t[LLS truncated]"));
 857         return (1);
 858     }
 859     ND_TCHECK2(*dptr, 2);
 860     ND_PRINT((ndo, "\n\t  LLS: checksum: 0x%04x", (u_int)EXTRACT_16BITS(dptr)));
 861
 862     dptr += 2;
 863     ND_TCHECK2(*dptr, 2);
 864     length2 = EXTRACT_16BITS(dptr);
 865     ND_PRINT((ndo, ", length: %u", length2));
 866
 867     dptr += 2;
 868     ND_TCHECK(*dptr);
 869     while (dptr < dataend) {
 870         ND_TCHECK2(*dptr, 2);
 871         lls_type = EXTRACT_16BITS(dptr);
 872         ND_PRINT((ndo, "\n\t    %s (%u)",
 873                tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type),
 874                lls_type));
 875         dptr += 2;
 876         ND_TCHECK2(*dptr, 2);
 877         lls_len = EXTRACT_16BITS(dptr);
 878         ND_PRINT((ndo, ", length: %u", lls_len));
 879         dptr += 2;
 880         switch (lls_type) {
 881
 882         case OSPF_LLS_EO:
 883             if (lls_len != 4) {
 884                 ND_PRINT((ndo, " [should be 4]"));
 885                 lls_len = 4;
 886             }
 887             ND_TCHECK2(*dptr, 4);
 888             lls_flags = EXTRACT_32BITS(dptr);
 889             ND_PRINT((ndo, "\n\t      Options: 0x%08x [%s]", lls_flags,
 890                    bittok2str(ospf_lls_eo_options, "?", lls_flags)));
 891
 892             break;
 893
 894         case OSPF_LLS_MD5:
 895             if (lls_len != 20) {
 896                 ND_PRINT((ndo, " [should be 20]"));
 897                 lls_len = 20;
 898             }
 899             ND_TCHECK2(*dptr, 4);
 900             ND_PRINT((ndo, "\n\t      Sequence number: 0x%08x", EXTRACT_32BITS(dptr)));
 901             break;
 902         }
 903
 904         dptr += lls_len;
 905     }
 906
 907     return (0);
 908 trunc:
 909     return (1);
 910 }
 911
 912 static int
 913 ospf_decode_v2(netdissect_options *ndo,
 914                register const struct ospfhdr *op, register const u_char *dataend)
 915 {
 916         register const struct in_addr *ap;
 917         register const struct lsr *lsrp;
 918         register const struct lsa_hdr *lshp;
 919         register const struct lsa *lsap;
 920         register uint32_t lsa_count,lsa_count_max;
 921
 922         switch (op->ospf_type) {
 923
 924         case OSPF_TYPE_UMD:
 925                 /*
 926                  * Rob Coltun's special monitoring packets;
 927                  * do nothing
 928                  */
 929                 break;
 930
 931         case OSPF_TYPE_HELLO:
 932                 ND_PRINT((ndo, "\n\tOptions [%s]",
 933                           bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options)));
 934
 935                 ND_TCHECK(op->ospf_hello.hello_deadint);
 936                 ND_PRINT((ndo, "\n\t  Hello Timer %us, Dead Timer %us, Mask %s, Priority %u",
 937                           EXTRACT_16BITS(&op->ospf_hello.hello_helloint),
 938                           EXTRACT_32BITS(&op->ospf_hello.hello_deadint),
 939                           ipaddr_string(ndo, &op->ospf_hello.hello_mask),
 940                           op->ospf_hello.hello_priority));
 941
 942                 ND_TCHECK(op->ospf_hello.hello_dr);
 943                 if (op->ospf_hello.hello_dr.s_addr != 0)
 944                         ND_PRINT((ndo, "\n\t  Designated Router %s",
 945                             ipaddr_string(ndo, &op->ospf_hello.hello_dr)));
 946
 947                 ND_TCHECK(op->ospf_hello.hello_bdr);
 948                 if (op->ospf_hello.hello_bdr.s_addr != 0)
 949                         ND_PRINT((ndo, ", Backup Designated Router %s",
 950                                   ipaddr_string(ndo, &op->ospf_hello.hello_bdr)));
 951
 952                 ap = op->ospf_hello.hello_neighbor;
 953                 if ((u_char *)ap < dataend)
 954                         ND_PRINT((ndo, "\n\t  Neighbor List:"));
 955                 while ((u_char *)ap < dataend) {
 956                         ND_TCHECK(*ap);
 957                         ND_PRINT((ndo, "\n\t    %s", ipaddr_string(ndo, ap)));
 958                         ++ap;
 959                 }
 960                 break;  /* HELLO */
 961
 962         case OSPF_TYPE_DD:
 963                 ND_TCHECK(op->ospf_db.db_options);
 964                 ND_PRINT((ndo, "\n\tOptions [%s]",
 965                           bittok2str(ospf_option_values, "none", op->ospf_db.db_options)));
 966                 ND_TCHECK(op->ospf_db.db_flags);
 967                 ND_PRINT((ndo, ", DD Flags [%s]",
 968                           bittok2str(ospf_dd_flag_values, "none", op->ospf_db.db_flags)));
 969                 ND_TCHECK(op->ospf_db.db_ifmtu);
 970                 if (op->ospf_db.db_ifmtu) {
 971                         ND_PRINT((ndo, ", MTU: %u", EXTRACT_16BITS(&op->ospf_db.db_ifmtu)));
 972                 }
 973                 ND_TCHECK(op->ospf_db.db_seq);
 974                 ND_PRINT((ndo, ", Sequence: 0x%08x", EXTRACT_32BITS(&op->ospf_db.db_seq)));
 975
 976                 /* Print all the LS adv's */
 977                 lshp = op->ospf_db.db_lshdr;
 978                 while (((u_char *)lshp < dataend) && ospf_print_lshdr(ndo, lshp) != -1) {
 979                         ++lshp;
 980                 }
 981                 break;
 982
 983         case OSPF_TYPE_LS_REQ:
 984                 lsrp = op->ospf_lsr;
 985                 while ((u_char *)lsrp < dataend) {
 986                     ND_TCHECK(*lsrp);
 987
 988                     ND_PRINT((ndo, "\n\t  Advertising Router: %s, %s LSA (%u)",
 989                            ipaddr_string(ndo, &lsrp->ls_router),
 990                            tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)),
 991                            EXTRACT_32BITS(&lsrp->ls_type)));
 992
 993                     switch (EXTRACT_32BITS(lsrp->ls_type)) {
 994                         /* the LSA header for opaque LSAs was slightly changed */
 995                     case LS_TYPE_OPAQUE_LL:
 996                     case LS_TYPE_OPAQUE_AL:
 997                     case LS_TYPE_OPAQUE_DW:
 998                         ND_PRINT((ndo, ", Opaque-Type: %s LSA (%u), Opaque-ID: %u",
 999                                tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type),
1000                                lsrp->un_ls_stateid.opaque_field.opaque_type,
1001                                EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id)));
1002                         break;
1003                     default:
1004                         ND_PRINT((ndo, ", LSA-ID: %s",
1005                                ipaddr_string(ndo, &lsrp->un_ls_stateid.ls_stateid)));
1006                         break;
1007                     }
1008
1009                     ++lsrp;
1010                 }
1011                 break;
1012
1013         case OSPF_TYPE_LS_UPDATE:
1014                 lsap = op->ospf_lsu.lsu_lsa;
1015                 ND_TCHECK(op->ospf_lsu.lsu_count);
1016                 lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count);
1017                 ND_PRINT((ndo, ", %d LSA%s", lsa_count_max, PLURAL_SUFFIX(lsa_count_max)));
1018                 for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) {
1019                     ND_PRINT((ndo, "\n\t  LSA #%u", lsa_count));
1020                         lsap = (const struct lsa *)ospf_print_lsa(ndo, lsap);
1021                         if (lsap == NULL)
1022                                 goto trunc;
1023                 }
1024                 break;
1025
1026         case OSPF_TYPE_LS_ACK:
1027                 lshp = op->ospf_lsa.lsa_lshdr;
1028                 while (ospf_print_lshdr(ndo, lshp) != -1) {
1029                     ++lshp;
1030                 }
1031                 break;
1032
1033         default:
1034                 break;
1035         }
1036         return (0);
1037 trunc:
1038         return (1);
1039 }
1040
1041 void
1042 ospf_print(netdissect_options *ndo,
1043            register const u_char *bp, register u_int length,
1044            const u_char *bp2 _U_)
1045 {
1046         register const struct ospfhdr *op;
1047         register const u_char *dataend;
1048         register const char *cp;
1049
1050         op = (struct ospfhdr *)bp;
1051
1052         /* XXX Before we do anything else, strip off the MD5 trailer */
1053         ND_TCHECK(op->ospf_authtype);
1054         if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) {
1055                 length -= OSPF_AUTH_MD5_LEN;
1056                 ndo->ndo_snapend -= OSPF_AUTH_MD5_LEN;
1057         }
1058
1059         /* If the type is valid translate it, or just print the type */
1060         /* value.  If it's not valid, say so and return */
1061         ND_TCHECK(op->ospf_type);
1062         cp = tok2str(type2str, "unknown LS-type", op->ospf_type);
1063         ND_PRINT((ndo, "OSPFv%u, %s, length %u", op->ospf_version, cp, length));
1064         if (*cp == 'u')
1065                 return;
1066
1067         if (!ndo->ndo_vflag) { /* non verbose - so lets bail out here */
1068                 return;
1069         }
1070
1071         ND_TCHECK(op->ospf_len);
1072         if (length != EXTRACT_16BITS(&op->ospf_len)) {
1073                 ND_PRINT((ndo, " [len %d]", EXTRACT_16BITS(&op->ospf_len)));
1074         }
1075
1076         if (length > EXTRACT_16BITS(&op->ospf_len)) {
1077                 dataend = bp + EXTRACT_16BITS(&op->ospf_len);
1078         } else {
1079                 dataend = bp + length;
1080         }
1081
1082         ND_TCHECK(op->ospf_routerid);
1083         ND_PRINT((ndo, "\n\tRouter-ID %s", ipaddr_string(ndo, &op->ospf_routerid)));
1084
1085         ND_TCHECK(op->ospf_areaid);
1086         if (op->ospf_areaid.s_addr != 0)
1087                 ND_PRINT((ndo, ", Area %s", ipaddr_string(ndo, &op->ospf_areaid)));
1088         else
1089                 ND_PRINT((ndo, ", Backbone Area"));
1090
1091         if (ndo->ndo_vflag) {
1092                 /* Print authentication data (should we really do this?) */
1093                 ND_TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata));
1094
1095                 ND_PRINT((ndo, ", Authentication Type: %s (%u)",
1096                           tok2str(ospf_authtype_values, "unknown", EXTRACT_16BITS(&op->ospf_authtype)),
1097                           EXTRACT_16BITS(&op->ospf_authtype)));
1098
1099                 switch (EXTRACT_16BITS(&op->ospf_authtype)) {
1100
1101                 case OSPF_AUTH_NONE:
1102                         break;
1103
1104                 case OSPF_AUTH_SIMPLE:
1105                         ND_PRINT((ndo, "\n\tSimple text password: "));
1106                         safeputs(ndo, op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN);
1107                         break;
1108
1109                 case OSPF_AUTH_MD5:
1110                         ND_PRINT((ndo, "\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x",
1111                                   *((op->ospf_authdata) + 2),
1112                                   *((op->ospf_authdata) + 3),
1113                                   EXTRACT_32BITS((op->ospf_authdata) + 4)));
1114                         break;
1115
1116                 default:
1117                         return;
1118                 }
1119         }
1120         /* Do rest according to version.         */
1121         switch (op->ospf_version) {
1122
1123         case 2:
1124                 /* ospf version 2 */
1125                 if (ospf_decode_v2(ndo, op, dataend))
1126                         goto trunc;
1127                 if (length > EXTRACT_16BITS(&op->ospf_len)) {
1128                         if (ospf_decode_lls(ndo, op, length))
1129                                 goto trunc;
1130                 }
1131                 break;
1132
1133         default:
1134                 ND_PRINT((ndo, " ospf [version %d]", op->ospf_version));
1135                 break;
1136         }                       /* end switch on version */
1137
1138         return;
1139 trunc:
1140         ND_PRINT((ndo, "%s", tstr));
1141 }