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