external/bsd/tcpdump/dist/print-olsr.c

   1 /*
   2  * Copyright (c) 1998-2007 The TCPDUMP project
   3  * Copyright (c) 2009  Florian Forster
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code
   7  * distributions retain the above copyright notice and this paragraph
   8  * in its entirety, and (2) distributions including binary code include
   9  * the above copyright notice and this paragraph in its entirety in
  10  * the documentation or other materials provided with the distribution.
  11  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
  12  * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
  13  * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  14  * FOR A PARTICULAR PURPOSE.
  15  *
  16  * Optimized Link State Protocl (OLSR) as per rfc3626
  17  *
  18  * Original code by Hannes Gredler <hannes@juniper.net>
  19  * IPv6 additions by Florian Forster <octo at verplant.org>
  20  */
  21
  22 #define NETDISSECT_REWORKED
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include <tcpdump-stdinc.h>
  28
  29 #include "interface.h"
  30 #include "addrtoname.h"
  31 #include "extract.h"
  32
  33 /*
  34  * RFC 3626 common header
  35  *
  36  *  0                   1                   2                   3
  37  *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
  38  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  39  * |         Packet Length         |    Packet Sequence Number     |
  40  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  41  * |  Message Type |     Vtime     |         Message Size          |
  42  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  43  * |                      Originator Address                       |
  44  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  45  * |  Time To Live |   Hop Count   |    Message Sequence Number    |
  46  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  47  * |                                                               |
  48  * :                            MESSAGE                            :
  49  * |                                                               |
  50  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  51  * |  Message Type |     Vtime     |         Message Size          |
  52  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  53  * |                      Originator Address                       |
  54  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  55  * |  Time To Live |   Hop Count   |    Message Sequence Number    |
  56  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  57  * |                                                               |
  58  * :                            MESSAGE                            :
  59  * |                                                               |
  60  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  61  * :                                                               :
  62  */
  63
  64 struct olsr_common {
  65     uint8_t packet_len[2];
  66     uint8_t packet_seq[2];
  67 };
  68
  69 #define OLSR_HELLO_MSG         1 /* rfc3626 */
  70 #define OLSR_TC_MSG            2 /* rfc3626 */
  71 #define OLSR_MID_MSG           3 /* rfc3626 */
  72 #define OLSR_HNA_MSG           4 /* rfc3626 */
  73 #define OLSR_POWERINFO_MSG   128
  74 #define OLSR_NAMESERVICE_MSG 130
  75 #define OLSR_HELLO_LQ_MSG    201 /* LQ extensions olsr.org */
  76 #define OLSR_TC_LQ_MSG       202 /* LQ extensions olsr.org */
  77
  78 static const struct tok olsr_msg_values[] = {
  79     { OLSR_HELLO_MSG, "Hello" },
  80     { OLSR_TC_MSG, "TC" },
  81     { OLSR_MID_MSG, "MID" },
  82     { OLSR_HNA_MSG, "HNA" },
  83     { OLSR_POWERINFO_MSG, "Powerinfo" },
  84     { OLSR_NAMESERVICE_MSG, "Nameservice" },
  85     { OLSR_HELLO_LQ_MSG, "Hello-LQ" },
  86     { OLSR_TC_LQ_MSG, "TC-LQ" },
  87     { 0, NULL}
  88 };
  89
  90 struct olsr_msg4 {
  91     uint8_t msg_type;
  92     uint8_t vtime;
  93     uint8_t msg_len[2];
  94     uint8_t originator[4];
  95     uint8_t ttl;
  96     uint8_t hopcount;
  97     uint8_t msg_seq[2];
  98 };
  99
 100 struct olsr_msg6 {
 101     uint8_t msg_type;
 102     uint8_t vtime;
 103     uint8_t msg_len[2];
 104     uint8_t originator[16];
 105     uint8_t ttl;
 106     uint8_t hopcount;
 107     uint8_t msg_seq[2];
 108 };
 109
 110 struct olsr_hello {
 111     uint8_t res[2];
 112     uint8_t htime;
 113     uint8_t will;
 114 };
 115
 116 struct olsr_hello_link {
 117     uint8_t link_code;
 118     uint8_t res;
 119     uint8_t len[2];
 120 };
 121
 122 struct olsr_tc {
 123     uint8_t ans_seq[2];
 124     uint8_t res[2];
 125 };
 126
 127 struct olsr_hna4 {
 128     uint8_t network[4];
 129     uint8_t mask[4];
 130 };
 131
 132 struct olsr_hna6 {
 133     uint8_t network[16];
 134     uint8_t mask[16];
 135 };
 136
 137
 138 #define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
 139 #define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
 140
 141 static const struct tok olsr_link_type_values[] = {
 142     { 0, "Unspecified" },
 143     { 1, "Asymmetric" },
 144     { 2, "Symmetric" },
 145     { 3, "Lost" },
 146     { 0, NULL}
 147 };
 148
 149 static const struct tok olsr_neighbor_type_values[] = {
 150     { 0, "Not-Neighbor" },
 151     { 1, "Symmetric" },
 152     { 2, "Symmetric-MPR" },
 153     { 0, NULL}
 154 };
 155
 156 struct olsr_lq_neighbor4 {
 157     uint8_t neighbor[4];
 158     uint8_t link_quality;
 159     uint8_t neighbor_link_quality;
 160     uint8_t res[2];
 161 };
 162
 163 struct olsr_lq_neighbor6 {
 164     uint8_t neighbor[16];
 165     uint8_t link_quality;
 166     uint8_t neighbor_link_quality;
 167     uint8_t res[2];
 168 };
 169
 170 /*
 171  * macro to convert the 8-bit mantissa/exponent to a double float
 172  * taken from olsr.org.
 173  */
 174 #define VTIME_SCALE_FACTOR    0.0625
 175 #define ME_TO_DOUBLE(me) \
 176   (double)(VTIME_SCALE_FACTOR*(1+(double)(me>>4)/16)*(double)(1<<(me&0x0F)))
 177
 178 /*
 179  * print a neighbor list with LQ extensions.
 180  */
 181 static int
 182 olsr_print_lq_neighbor4(netdissect_options *ndo,
 183                         const u_char *msg_data, u_int hello_len)
 184 {
 185     struct olsr_lq_neighbor4 *lq_neighbor;
 186
 187     while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
 188
 189         lq_neighbor = (struct olsr_lq_neighbor4 *)msg_data;
 190         if (!ND_TTEST(*lq_neighbor))
 191             return (-1);
 192
 193         ND_PRINT((ndo, "\n\t      neighbor %s, link-quality %.2lf%%"
 194                ", neighbor-link-quality %.2lf%%",
 195                ipaddr_string(ndo, lq_neighbor->neighbor),
 196                ((double)lq_neighbor->link_quality/2.55),
 197                ((double)lq_neighbor->neighbor_link_quality/2.55)));
 198
 199         msg_data += sizeof(struct olsr_lq_neighbor4);
 200         hello_len -= sizeof(struct olsr_lq_neighbor4);
 201     }
 202     return (0);
 203 }
 204
 205 #if INET6
 206 static int
 207 olsr_print_lq_neighbor6(netdissect_options *ndo,
 208                         const u_char *msg_data, u_int hello_len)
 209 {
 210     struct olsr_lq_neighbor6 *lq_neighbor;
 211
 212     while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
 213
 214         lq_neighbor = (struct olsr_lq_neighbor6 *)msg_data;
 215         if (!ND_TTEST(*lq_neighbor))
 216             return (-1);
 217
 218         ND_PRINT((ndo, "\n\t      neighbor %s, link-quality %.2lf%%"
 219                ", neighbor-link-quality %.2lf%%",
 220                ip6addr_string(ndo, lq_neighbor->neighbor),
 221                ((double)lq_neighbor->link_quality/2.55),
 222                ((double)lq_neighbor->neighbor_link_quality/2.55)));
 223
 224         msg_data += sizeof(struct olsr_lq_neighbor6);
 225         hello_len -= sizeof(struct olsr_lq_neighbor6);
 226     }
 227     return (0);
 228 }
 229 #endif /* INET6 */
 230
 231 /*
 232  * print a neighbor list.
 233  */
 234 static int
 235 olsr_print_neighbor(netdissect_options *ndo,
 236                     const u_char *msg_data, u_int hello_len)
 237 {
 238     int neighbor;
 239
 240     ND_PRINT((ndo, "\n\t      neighbor\n\t\t"));
 241     neighbor = 1;
 242
 243     while (hello_len >= sizeof(struct in_addr)) {
 244
 245         if (!ND_TTEST2(*msg_data, sizeof(struct in_addr)))
 246             return (-1);
 247         /* print 4 neighbors per line */
 248
 249         ND_PRINT((ndo, "%s%s", ipaddr_string(ndo, msg_data),
 250                neighbor % 4 == 0 ? "\n\t\t" : " "));
 251
 252         msg_data += sizeof(struct in_addr);
 253         hello_len -= sizeof(struct in_addr);
 254     }
 255     return (0);
 256 }
 257
 258
 259 void
 260 olsr_print(netdissect_options *ndo,
 261            const u_char *pptr, u_int length, int is_ipv6)
 262 {
 263     union {
 264         const struct olsr_common *common;
 265         const struct olsr_msg4 *msg4;
 266         const struct olsr_msg6 *msg6;
 267         const struct olsr_hello *hello;
 268         const struct olsr_hello_link *hello_link;
 269         const struct olsr_tc *tc;
 270         const struct olsr_hna4 *hna;
 271     } ptr;
 272
 273     u_int msg_type, msg_len, msg_tlen, hello_len;
 274     uint16_t name_entry_type, name_entry_len;
 275     u_int name_entry_padding;
 276     uint8_t link_type, neighbor_type;
 277     const u_char *tptr, *msg_data;
 278
 279     tptr = pptr;
 280
 281     if (length < sizeof(struct olsr_common)) {
 282         goto trunc;
 283     }
 284
 285     ND_TCHECK2(*tptr, sizeof(struct olsr_common));
 286
 287     ptr.common = (struct olsr_common *)tptr;
 288     length = min(length, EXTRACT_16BITS(ptr.common->packet_len));
 289
 290     ND_PRINT((ndo, "OLSRv%i, seq 0x%04x, length %u",
 291             (is_ipv6 == 0) ? 4 : 6,
 292             EXTRACT_16BITS(ptr.common->packet_seq),
 293             length));
 294
 295     tptr += sizeof(struct olsr_common);
 296
 297     /*
 298      * In non-verbose mode, just print version.
 299      */
 300     if (ndo->ndo_vflag < 1) {
 301         return;
 302     }
 303
 304     while (tptr < (pptr+length)) {
 305         union
 306         {
 307             struct olsr_msg4 *v4;
 308             struct olsr_msg6 *v6;
 309         } msgptr;
 310         int msg_len_valid = 0;
 311
 312         ND_TCHECK2(*tptr, sizeof(struct olsr_msg4));
 313
 314 #if INET6
 315         if (is_ipv6)
 316         {
 317             msgptr.v6 = (struct olsr_msg6 *) tptr;
 318             msg_type = msgptr.v6->msg_type;
 319             msg_len = EXTRACT_16BITS(msgptr.v6->msg_len);
 320             if ((msg_len >= sizeof (struct olsr_msg6))
 321                     && (msg_len <= length))
 322                 msg_len_valid = 1;
 323
 324             /* infinite loop check */
 325             if (msg_type == 0 || msg_len == 0) {
 326                 return;
 327             }
 328
 329             ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
 330                     "\n\t  vtime %.3lfs, msg-seq 0x%04x, length %u%s",
 331                     tok2str(olsr_msg_values, "Unknown", msg_type),
 332                     msg_type, ip6addr_string(ndo, msgptr.v6->originator),
 333                     msgptr.v6->ttl,
 334                     msgptr.v6->hopcount,
 335                     ME_TO_DOUBLE(msgptr.v6->vtime),
 336                     EXTRACT_16BITS(msgptr.v6->msg_seq),
 337                     msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
 338             if (!msg_len_valid) {
 339                 return;
 340             }
 341
 342             msg_tlen = msg_len - sizeof(struct olsr_msg6);
 343             msg_data = tptr + sizeof(struct olsr_msg6);
 344         }
 345         else /* (!is_ipv6) */
 346 #endif /* INET6 */
 347         {
 348             msgptr.v4 = (struct olsr_msg4 *) tptr;
 349             msg_type = msgptr.v4->msg_type;
 350             msg_len = EXTRACT_16BITS(msgptr.v4->msg_len);
 351             if ((msg_len >= sizeof (struct olsr_msg4))
 352                     && (msg_len <= length))
 353                 msg_len_valid = 1;
 354
 355             /* infinite loop check */
 356             if (msg_type == 0 || msg_len == 0) {
 357                 return;
 358             }
 359
 360             ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
 361                     "\n\t  vtime %.3lfs, msg-seq 0x%04x, length %u%s",
 362                     tok2str(olsr_msg_values, "Unknown", msg_type),
 363                     msg_type, ipaddr_string(ndo, msgptr.v4->originator),
 364                     msgptr.v4->ttl,
 365                     msgptr.v4->hopcount,
 366                     ME_TO_DOUBLE(msgptr.v4->vtime),
 367                     EXTRACT_16BITS(msgptr.v4->msg_seq),
 368                     msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
 369             if (!msg_len_valid) {
 370                 return;
 371             }
 372
 373             msg_tlen = msg_len - sizeof(struct olsr_msg4);
 374             msg_data = tptr + sizeof(struct olsr_msg4);
 375         }
 376
 377         switch (msg_type) {
 378         case OLSR_HELLO_MSG:
 379         case OLSR_HELLO_LQ_MSG:
 380             if (msg_tlen < sizeof(struct olsr_hello))
 381                 goto trunc;
 382             ND_TCHECK2(*msg_data, sizeof(struct olsr_hello));
 383
 384             ptr.hello = (struct olsr_hello *)msg_data;
 385             ND_PRINT((ndo, "\n\t  hello-time %.3lfs, MPR willingness %u",
 386                    ME_TO_DOUBLE(ptr.hello->htime), ptr.hello->will));
 387             msg_data += sizeof(struct olsr_hello);
 388             msg_tlen -= sizeof(struct olsr_hello);
 389
 390             while (msg_tlen >= sizeof(struct olsr_hello_link)) {
 391                 int hello_len_valid = 0;
 392
 393                 /*
 394                  * link-type.
 395                  */
 396                 ND_TCHECK2(*msg_data, sizeof(struct olsr_hello_link));
 397
 398                 ptr.hello_link = (struct olsr_hello_link *)msg_data;
 399
 400                 hello_len = EXTRACT_16BITS(ptr.hello_link->len);
 401                 link_type = OLSR_EXTRACT_LINK_TYPE(ptr.hello_link->link_code);
 402                 neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(ptr.hello_link->link_code);
 403
 404                 if ((hello_len <= msg_tlen)
 405                         && (hello_len >= sizeof(struct olsr_hello_link)))
 406                     hello_len_valid = 1;
 407
 408                 ND_PRINT((ndo, "\n\t    link-type %s, neighbor-type %s, len %u%s",
 409                        tok2str(olsr_link_type_values, "Unknown", link_type),
 410                        tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
 411                        hello_len,
 412                        (hello_len_valid == 0) ? " (invalid)" : ""));
 413
 414                 if (hello_len_valid == 0)
 415                     break;
 416
 417                 msg_data += sizeof(struct olsr_hello_link);
 418                 msg_tlen -= sizeof(struct olsr_hello_link);
 419                 hello_len -= sizeof(struct olsr_hello_link);
 420
 421                 ND_TCHECK2(*msg_data, hello_len);
 422                 if (msg_type == OLSR_HELLO_MSG) {
 423                     if (olsr_print_neighbor(ndo, msg_data, hello_len) == -1)
 424                         goto trunc;
 425                 } else {
 426 #if INET6
 427                     if (is_ipv6) {
 428                         if (olsr_print_lq_neighbor6(ndo, msg_data, hello_len) == -1)
 429                             goto trunc;
 430                     } else
 431 #endif
 432                     {
 433                         if (olsr_print_lq_neighbor4(ndo, msg_data, hello_len) == -1)
 434                             goto trunc;
 435                     }
 436                 }
 437
 438                 msg_data += hello_len;
 439                 msg_tlen -= hello_len;
 440             }
 441             break;
 442
 443         case OLSR_TC_MSG:
 444         case OLSR_TC_LQ_MSG:
 445             if (msg_tlen < sizeof(struct olsr_tc))
 446                 goto trunc;
 447             ND_TCHECK2(*msg_data, sizeof(struct olsr_tc));
 448
 449             ptr.tc = (struct olsr_tc *)msg_data;
 450             ND_PRINT((ndo, "\n\t    advertised neighbor seq 0x%04x",
 451                    EXTRACT_16BITS(ptr.tc->ans_seq)));
 452             msg_data += sizeof(struct olsr_tc);
 453             msg_tlen -= sizeof(struct olsr_tc);
 454
 455             if (msg_type == OLSR_TC_MSG) {
 456                 if (olsr_print_neighbor(ndo, msg_data, msg_tlen) == -1)
 457                     goto trunc;
 458             } else {
 459 #if INET6
 460                 if (is_ipv6) {
 461                     if (olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen) == -1)
 462                         goto trunc;
 463                 } else
 464 #endif
 465                 {
 466                     if (olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen) == -1)
 467                         goto trunc;
 468                 }
 469             }
 470             break;
 471
 472         case OLSR_MID_MSG:
 473         {
 474             size_t addr_size = sizeof(struct in_addr);
 475
 476 #if INET6
 477             if (is_ipv6)
 478                 addr_size = sizeof(struct in6_addr);
 479 #endif
 480
 481             while (msg_tlen >= addr_size) {
 482                 ND_TCHECK2(*msg_data, addr_size);
 483 #if INET6
 484                 ND_PRINT((ndo, "\n\t  interface address %s",
 485                         is_ipv6 ? ip6addr_string(ndo, msg_data) :
 486                         ipaddr_string(ndo, msg_data)));
 487 #else
 488                 ND_PRINT((ndo, "\n\t  interface address %s",
 489                         ipaddr_string(ndo, msg_data)));
 490 #endif
 491
 492                 msg_data += addr_size;
 493                 msg_tlen -= addr_size;
 494             }
 495             break;
 496         }
 497
 498         case OLSR_HNA_MSG:
 499             ND_PRINT((ndo, "\n\t  Advertised networks (total %u)",
 500                     (unsigned int) (msg_tlen / sizeof(struct olsr_hna6))));
 501 #if INET6
 502             if (is_ipv6)
 503             {
 504                 int i = 0;
 505                 while (msg_tlen >= sizeof(struct olsr_hna6)) {
 506                     struct olsr_hna6 *hna6;
 507
 508                     ND_TCHECK2(*msg_data, sizeof(struct olsr_hna6));
 509
 510                     hna6 = (struct olsr_hna6 *)msg_data;
 511
 512                     ND_PRINT((ndo, "\n\t    #%i: %s/%u",
 513                             i, ip6addr_string(ndo, hna6->network),
 514                             mask62plen (hna6->mask)));
 515
 516                     msg_data += sizeof(struct olsr_hna6);
 517                     msg_tlen -= sizeof(struct olsr_hna6);
 518                 }
 519             }
 520             else
 521 #endif
 522             {
 523                 int col = 0;
 524                 while (msg_tlen >= sizeof(struct olsr_hna4)) {
 525                     ND_TCHECK2(*msg_data, sizeof(struct olsr_hna4));
 526
 527                     ptr.hna = (struct olsr_hna4 *)msg_data;
 528
 529                     /* print 4 prefixes per line */
 530                     ND_PRINT((ndo, "%s%s/%u",
 531                             col == 0 ? "\n\t    " : ", ",
 532                             ipaddr_string(ndo, ptr.hna->network),
 533                             mask2plen(EXTRACT_32BITS(ptr.hna->mask))));
 534
 535                     msg_data += sizeof(struct olsr_hna4);
 536                     msg_tlen -= sizeof(struct olsr_hna4);
 537
 538                     col = (col + 1) % 4;
 539                 }
 540             }
 541             break;
 542
 543         case OLSR_NAMESERVICE_MSG:
 544         {
 545             u_int name_entries = EXTRACT_16BITS(msg_data+2);
 546             u_int addr_size = 4;
 547             int name_entries_valid = 0;
 548             u_int i;
 549
 550             if (is_ipv6)
 551                 addr_size = 16;
 552
 553             if ((name_entries > 0)
 554                     && ((name_entries * (4 + addr_size)) <= msg_tlen))
 555                 name_entries_valid = 1;
 556
 557             if (msg_tlen < 4)
 558                 goto trunc;
 559             ND_TCHECK2(*msg_data, 4);
 560
 561             ND_PRINT((ndo, "\n\t  Version %u, Entries %u%s",
 562                    EXTRACT_16BITS(msg_data),
 563                    name_entries, (name_entries_valid == 0) ? " (invalid)" : ""));
 564
 565             if (name_entries_valid == 0)
 566                 break;
 567
 568             msg_data += 4;
 569             msg_tlen -= 4;
 570
 571             for (i = 0; i < name_entries; i++) {
 572                 int name_entry_len_valid = 0;
 573
 574                 if (msg_tlen < 4)
 575                     break;
 576                 ND_TCHECK2(*msg_data, 4);
 577
 578                 name_entry_type = EXTRACT_16BITS(msg_data);
 579                 name_entry_len = EXTRACT_16BITS(msg_data+2);
 580
 581                 msg_data += 4;
 582                 msg_tlen -= 4;
 583
 584                 if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
 585                     name_entry_len_valid = 1;
 586
 587                 ND_PRINT((ndo, "\n\t    #%u: type %#06x, length %u%s",
 588                         (unsigned int) i, name_entry_type,
 589                         name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : ""));
 590
 591                 if (name_entry_len_valid == 0)
 592                     break;
 593
 594                 /* 32-bit alignment */
 595                 name_entry_padding = 0;
 596                 if (name_entry_len%4 != 0)
 597                     name_entry_padding = 4-(name_entry_len%4);
 598
 599                 if (msg_tlen < addr_size + name_entry_len + name_entry_padding)
 600                     goto trunc;
 601
 602                 ND_TCHECK2(*msg_data, addr_size + name_entry_len + name_entry_padding);
 603
 604 #if INET6
 605                 if (is_ipv6)
 606                     ND_PRINT((ndo, ", address %s, name \"",
 607                             ip6addr_string(ndo, msg_data)));
 608                 else
 609 #endif
 610                     ND_PRINT((ndo, ", address %s, name \"",
 611                             ipaddr_string(ndo, msg_data)));
 612                 (void)fn_printn(ndo, msg_data + addr_size, name_entry_len, NULL);
 613                 ND_PRINT((ndo, "\""));
 614
 615                 msg_data += addr_size + name_entry_len + name_entry_padding;
 616                 msg_tlen -= addr_size + name_entry_len + name_entry_padding;
 617             } /* for (i = 0; i < name_entries; i++) */
 618             break;
 619         } /* case OLSR_NAMESERVICE_MSG */
 620
 621             /*
 622              * FIXME those are the defined messages that lack a decoder
 623              * you are welcome to contribute code ;-)
 624              */
 625         case OLSR_POWERINFO_MSG:
 626         default:
 627             print_unknown_data(ndo, msg_data, "\n\t    ", msg_tlen);
 628             break;
 629         } /* switch (msg_type) */
 630         tptr += msg_len;
 631     } /* while (tptr < (pptr+length)) */
 632
 633     return;
 634
 635  trunc:
 636     ND_PRINT((ndo, "[|olsr]"));
 637 }
 638
 639 /*
 640  * Local Variables:
 641  * c-style: whitesmith
 642  * c-basic-offset: 4
 643  * End:
 644  */