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  * Original code by Hannes Gredler <hannes@gredler.at>
  17  * IPv6 additions by Florian Forster <octo at verplant.org>
  18  */
  19
  20 /* \summary: Optimized Link State Routing Protocol (OLSR) printer */
  21
  22 /* specification: RFC 3626 */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include <netdissect-stdinc.h>
  29
  30 #include "netdissect.h"
  31 #include "addrtoname.h"
  32 #include "extract.h"
  33
  34 /*
  35  * RFC 3626 common header
  36  *
  37  *  0                   1                   2                   3
  38  *  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
  39  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  40  * |         Packet Length         |    Packet Sequence Number     |
  41  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  42  * |  Message Type |     Vtime     |         Message Size          |
  43  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  44  * |                      Originator Address                       |
  45  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  46  * |  Time To Live |   Hop Count   |    Message Sequence Number    |
  47  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  48  * |                                                               |
  49  * :                            MESSAGE                            :
  50  * |                                                               |
  51  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  52  * |  Message Type |     Vtime     |         Message Size          |
  53  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  54  * |                      Originator Address                       |
  55  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  56  * |  Time To Live |   Hop Count   |    Message Sequence Number    |
  57  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  58  * |                                                               |
  59  * :                            MESSAGE                            :
  60  * |                                                               |
  61  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  62  * :                                                               :
  63  */
  64
  65 struct olsr_common {
  66     uint8_t packet_len[2];
  67     uint8_t packet_seq[2];
  68 };
  69
  70 #define OLSR_HELLO_MSG         1 /* rfc3626 */
  71 #define OLSR_TC_MSG            2 /* rfc3626 */
  72 #define OLSR_MID_MSG           3 /* rfc3626 */
  73 #define OLSR_HNA_MSG           4 /* rfc3626 */
  74 #define OLSR_POWERINFO_MSG   128
  75 #define OLSR_NAMESERVICE_MSG 130
  76 #define OLSR_HELLO_LQ_MSG    201 /* LQ extensions olsr.org */
  77 #define OLSR_TC_LQ_MSG       202 /* LQ extensions olsr.org */
  78
  79 static const struct tok olsr_msg_values[] = {
  80     { OLSR_HELLO_MSG, "Hello" },
  81     { OLSR_TC_MSG, "TC" },
  82     { OLSR_MID_MSG, "MID" },
  83     { OLSR_HNA_MSG, "HNA" },
  84     { OLSR_POWERINFO_MSG, "Powerinfo" },
  85     { OLSR_NAMESERVICE_MSG, "Nameservice" },
  86     { OLSR_HELLO_LQ_MSG, "Hello-LQ" },
  87     { OLSR_TC_LQ_MSG, "TC-LQ" },
  88     { 0, NULL}
  89 };
  90
  91 struct olsr_msg4 {
  92     uint8_t msg_type;
  93     uint8_t vtime;
  94     uint8_t msg_len[2];
  95     uint8_t originator[4];
  96     uint8_t ttl;
  97     uint8_t hopcount;
  98     uint8_t msg_seq[2];
  99 };
 100
 101 struct olsr_msg6 {
 102     uint8_t msg_type;
 103     uint8_t vtime;
 104     uint8_t msg_len[2];
 105     uint8_t originator[16];
 106     uint8_t ttl;
 107     uint8_t hopcount;
 108     uint8_t msg_seq[2];
 109 };
 110
 111 struct olsr_hello {
 112     uint8_t res[2];
 113     uint8_t htime;
 114     uint8_t will;
 115 };
 116
 117 struct olsr_hello_link {
 118     uint8_t link_code;
 119     uint8_t res;
 120     uint8_t len[2];
 121 };
 122
 123 struct olsr_tc {
 124     uint8_t ans_seq[2];
 125     uint8_t res[2];
 126 };
 127
 128 struct olsr_hna4 {
 129     uint8_t network[4];
 130     uint8_t mask[4];
 131 };
 132
 133 struct olsr_hna6 {
 134     uint8_t network[16];
 135     uint8_t mask[16];
 136 };
 137
 138
 139 /** gateway HNA flags */
 140 enum gateway_hna_flags {
 141   GW_HNA_FLAG_LINKSPEED   = 1 << 0,
 142   GW_HNA_FLAG_IPV4        = 1 << 1,
 143   GW_HNA_FLAG_IPV4_NAT    = 1 << 2,
 144   GW_HNA_FLAG_IPV6        = 1 << 3,
 145   GW_HNA_FLAG_IPV6PREFIX  = 1 << 4
 146 };
 147
 148 /** gateway HNA field byte offsets in the netmask field of the HNA */
 149 enum gateway_hna_fields {
 150   GW_HNA_PAD              = 0,
 151   GW_HNA_FLAGS            = 1,
 152   GW_HNA_UPLINK           = 2,
 153   GW_HNA_DOWNLINK         = 3,
 154   GW_HNA_V6PREFIXLEN      = 4,
 155   GW_HNA_V6PREFIX         = 5
 156 };
 157
 158
 159 #define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
 160 #define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
 161
 162 static const struct tok olsr_link_type_values[] = {
 163     { 0, "Unspecified" },
 164     { 1, "Asymmetric" },
 165     { 2, "Symmetric" },
 166     { 3, "Lost" },
 167     { 0, NULL}
 168 };
 169
 170 static const struct tok olsr_neighbor_type_values[] = {
 171     { 0, "Not-Neighbor" },
 172     { 1, "Symmetric" },
 173     { 2, "Symmetric-MPR" },
 174     { 0, NULL}
 175 };
 176
 177 struct olsr_lq_neighbor4 {
 178     uint8_t neighbor[4];
 179     uint8_t link_quality;
 180     uint8_t neighbor_link_quality;
 181     uint8_t res[2];
 182 };
 183
 184 struct olsr_lq_neighbor6 {
 185     uint8_t neighbor[16];
 186     uint8_t link_quality;
 187     uint8_t neighbor_link_quality;
 188     uint8_t res[2];
 189 };
 190
 191 #define MAX_SMARTGW_SPEED    320000000
 192
 193 /**
 194  * Convert an encoded 1 byte transport value (5 bits mantissa, 3 bits exponent)
 195  * to an uplink/downlink speed value
 196  *
 197  * @param value the encoded 1 byte transport value
 198  * @return the uplink/downlink speed value (in kbit/s)
 199  */
 200 static uint32_t deserialize_gw_speed(uint8_t value) {
 201   uint32_t speed;
 202   uint32_t exp;
 203
 204   if (!value) {
 205     return 0;
 206   }
 207
 208   if (value == UINT8_MAX) {
 209     /* maximum value: also return maximum value */
 210     return MAX_SMARTGW_SPEED;
 211   }
 212
 213   speed = (value >> 3) + 1;
 214   exp = value & 7;
 215
 216   while (exp-- > 0) {
 217     speed *= 10;
 218   }
 219   return speed;
 220 }
 221
 222 /*
 223  * macro to convert the 8-bit mantissa/exponent to a double float
 224  * taken from olsr.org.
 225  */
 226 #define VTIME_SCALE_FACTOR    0.0625
 227 #define ME_TO_DOUBLE(me) \
 228   (double)(VTIME_SCALE_FACTOR*(1+(double)(me>>4)/16)*(double)(1<<(me&0x0F)))
 229
 230 /*
 231  * print a neighbor list with LQ extensions.
 232  */
 233 static int
 234 olsr_print_lq_neighbor4(netdissect_options *ndo,
 235                         const u_char *msg_data, u_int hello_len)
 236 {
 237     const struct olsr_lq_neighbor4 *lq_neighbor;
 238
 239     while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
 240
 241         lq_neighbor = (const struct olsr_lq_neighbor4 *)msg_data;
 242         if (!ND_TTEST(*lq_neighbor))
 243             return (-1);
 244
 245         ND_PRINT((ndo, "\n\t      neighbor %s, link-quality %.2f%%"
 246                ", neighbor-link-quality %.2f%%",
 247                ipaddr_string(ndo, lq_neighbor->neighbor),
 248                ((double)lq_neighbor->link_quality/2.55),
 249                ((double)lq_neighbor->neighbor_link_quality/2.55)));
 250
 251         msg_data += sizeof(struct olsr_lq_neighbor4);
 252         hello_len -= sizeof(struct olsr_lq_neighbor4);
 253     }
 254     return (0);
 255 }
 256
 257 static int
 258 olsr_print_lq_neighbor6(netdissect_options *ndo,
 259                         const u_char *msg_data, u_int hello_len)
 260 {
 261     const struct olsr_lq_neighbor6 *lq_neighbor;
 262
 263     while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
 264
 265         lq_neighbor = (const struct olsr_lq_neighbor6 *)msg_data;
 266         if (!ND_TTEST(*lq_neighbor))
 267             return (-1);
 268
 269         ND_PRINT((ndo, "\n\t      neighbor %s, link-quality %.2f%%"
 270                ", neighbor-link-quality %.2f%%",
 271                ip6addr_string(ndo, lq_neighbor->neighbor),
 272                ((double)lq_neighbor->link_quality/2.55),
 273                ((double)lq_neighbor->neighbor_link_quality/2.55)));
 274
 275         msg_data += sizeof(struct olsr_lq_neighbor6);
 276         hello_len -= sizeof(struct olsr_lq_neighbor6);
 277     }
 278     return (0);
 279 }
 280
 281 /*
 282  * print a neighbor list.
 283  */
 284 static int
 285 olsr_print_neighbor(netdissect_options *ndo,
 286                     const u_char *msg_data, u_int hello_len)
 287 {
 288     int neighbor;
 289
 290     ND_PRINT((ndo, "\n\t      neighbor\n\t\t"));
 291     neighbor = 1;
 292
 293     while (hello_len >= sizeof(struct in_addr)) {
 294
 295         if (!ND_TTEST2(*msg_data, sizeof(struct in_addr)))
 296             return (-1);
 297         /* print 4 neighbors per line */
 298
 299         ND_PRINT((ndo, "%s%s", ipaddr_string(ndo, msg_data),
 300                neighbor % 4 == 0 ? "\n\t\t" : " "));
 301
 302         msg_data += sizeof(struct in_addr);
 303         hello_len -= sizeof(struct in_addr);
 304     }
 305     return (0);
 306 }
 307
 308
 309 void
 310 olsr_print(netdissect_options *ndo,
 311            const u_char *pptr, u_int length, int is_ipv6)
 312 {
 313     union {
 314         const struct olsr_common *common;
 315         const struct olsr_msg4 *msg4;
 316         const struct olsr_msg6 *msg6;
 317         const struct olsr_hello *hello;
 318         const struct olsr_hello_link *hello_link;
 319         const struct olsr_tc *tc;
 320         const struct olsr_hna4 *hna;
 321     } ptr;
 322
 323     u_int msg_type, msg_len, msg_tlen, hello_len;
 324     uint16_t name_entry_type, name_entry_len;
 325     u_int name_entry_padding;
 326     uint8_t link_type, neighbor_type;
 327     const u_char *tptr, *msg_data;
 328
 329     tptr = pptr;
 330
 331     if (length < sizeof(struct olsr_common)) {
 332         goto trunc;
 333     }
 334
 335     ND_TCHECK2(*tptr, sizeof(struct olsr_common));
 336
 337     ptr.common = (const struct olsr_common *)tptr;
 338     length = min(length, EXTRACT_BE_U_2(ptr.common->packet_len));
 339
 340     ND_PRINT((ndo, "OLSRv%i, seq 0x%04x, length %u",
 341             (is_ipv6 == 0) ? 4 : 6,
 342             EXTRACT_BE_U_2(ptr.common->packet_seq),
 343             length));
 344
 345     tptr += sizeof(struct olsr_common);
 346
 347     /*
 348      * In non-verbose mode, just print version.
 349      */
 350     if (ndo->ndo_vflag < 1) {
 351         return;
 352     }
 353
 354     while (tptr < (pptr+length)) {
 355         union
 356         {
 357             const struct olsr_msg4 *v4;
 358             const struct olsr_msg6 *v6;
 359         } msgptr;
 360         int msg_len_valid = 0;
 361
 362         if (is_ipv6)
 363         {
 364             ND_TCHECK2(*tptr, sizeof(struct olsr_msg6));
 365             msgptr.v6 = (const struct olsr_msg6 *) tptr;
 366             msg_type = msgptr.v6->msg_type;
 367             msg_len = EXTRACT_BE_U_2(msgptr.v6->msg_len);
 368             if ((msg_len >= sizeof (struct olsr_msg6))
 369                     && (msg_len <= length))
 370                 msg_len_valid = 1;
 371
 372             /* infinite loop check */
 373             if (msg_type == 0 || msg_len == 0) {
 374                 return;
 375             }
 376
 377             ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
 378                     "\n\t  vtime %.3fs, msg-seq 0x%04x, length %u%s",
 379                     tok2str(olsr_msg_values, "Unknown", msg_type),
 380                     msg_type, ip6addr_string(ndo, msgptr.v6->originator),
 381                     msgptr.v6->ttl,
 382                     msgptr.v6->hopcount,
 383                     ME_TO_DOUBLE(msgptr.v6->vtime),
 384                     EXTRACT_BE_U_2(msgptr.v6->msg_seq),
 385                     msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
 386             if (!msg_len_valid) {
 387                 return;
 388             }
 389
 390             msg_tlen = msg_len - sizeof(struct olsr_msg6);
 391             msg_data = tptr + sizeof(struct olsr_msg6);
 392         }
 393         else /* (!is_ipv6) */
 394         {
 395             ND_TCHECK2(*tptr, sizeof(struct olsr_msg4));
 396             msgptr.v4 = (const struct olsr_msg4 *) tptr;
 397             msg_type = msgptr.v4->msg_type;
 398             msg_len = EXTRACT_BE_U_2(msgptr.v4->msg_len);
 399             if ((msg_len >= sizeof (struct olsr_msg4))
 400                     && (msg_len <= length))
 401                 msg_len_valid = 1;
 402
 403             /* infinite loop check */
 404             if (msg_type == 0 || msg_len == 0) {
 405                 return;
 406             }
 407
 408             ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
 409                     "\n\t  vtime %.3fs, msg-seq 0x%04x, length %u%s",
 410                     tok2str(olsr_msg_values, "Unknown", msg_type),
 411                     msg_type, ipaddr_string(ndo, msgptr.v4->originator),
 412                     msgptr.v4->ttl,
 413                     msgptr.v4->hopcount,
 414                     ME_TO_DOUBLE(msgptr.v4->vtime),
 415                     EXTRACT_BE_U_2(msgptr.v4->msg_seq),
 416                     msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
 417             if (!msg_len_valid) {
 418                 return;
 419             }
 420
 421             msg_tlen = msg_len - sizeof(struct olsr_msg4);
 422             msg_data = tptr + sizeof(struct olsr_msg4);
 423         }
 424
 425         switch (msg_type) {
 426         case OLSR_HELLO_MSG:
 427         case OLSR_HELLO_LQ_MSG:
 428             if (msg_tlen < sizeof(struct olsr_hello))
 429                 goto trunc;
 430             ND_TCHECK2(*msg_data, sizeof(struct olsr_hello));
 431
 432             ptr.hello = (const struct olsr_hello *)msg_data;
 433             ND_PRINT((ndo, "\n\t  hello-time %.3fs, MPR willingness %u",
 434                    ME_TO_DOUBLE(ptr.hello->htime), ptr.hello->will));
 435             msg_data += sizeof(struct olsr_hello);
 436             msg_tlen -= sizeof(struct olsr_hello);
 437
 438             while (msg_tlen >= sizeof(struct olsr_hello_link)) {
 439                 int hello_len_valid = 0;
 440
 441                 /*
 442                  * link-type.
 443                  */
 444                 ND_TCHECK2(*msg_data, sizeof(struct olsr_hello_link));
 445
 446                 ptr.hello_link = (const struct olsr_hello_link *)msg_data;
 447
 448                 hello_len = EXTRACT_BE_U_2(ptr.hello_link->len);
 449                 link_type = OLSR_EXTRACT_LINK_TYPE(ptr.hello_link->link_code);
 450                 neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(ptr.hello_link->link_code);
 451
 452                 if ((hello_len <= msg_tlen)
 453                         && (hello_len >= sizeof(struct olsr_hello_link)))
 454                     hello_len_valid = 1;
 455
 456                 ND_PRINT((ndo, "\n\t    link-type %s, neighbor-type %s, len %u%s",
 457                        tok2str(olsr_link_type_values, "Unknown", link_type),
 458                        tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
 459                        hello_len,
 460                        (hello_len_valid == 0) ? " (invalid)" : ""));
 461
 462                 if (hello_len_valid == 0)
 463                     break;
 464
 465                 msg_data += sizeof(struct olsr_hello_link);
 466                 msg_tlen -= sizeof(struct olsr_hello_link);
 467                 hello_len -= sizeof(struct olsr_hello_link);
 468
 469                 ND_TCHECK2(*msg_data, hello_len);
 470                 if (msg_type == OLSR_HELLO_MSG) {
 471                     if (olsr_print_neighbor(ndo, msg_data, hello_len) == -1)
 472                         goto trunc;
 473                 } else {
 474                     if (is_ipv6) {
 475                         if (olsr_print_lq_neighbor6(ndo, msg_data, hello_len) == -1)
 476                             goto trunc;
 477                     } else {
 478                         if (olsr_print_lq_neighbor4(ndo, msg_data, hello_len) == -1)
 479                             goto trunc;
 480                     }
 481                 }
 482
 483                 msg_data += hello_len;
 484                 msg_tlen -= hello_len;
 485             }
 486             break;
 487
 488         case OLSR_TC_MSG:
 489         case OLSR_TC_LQ_MSG:
 490             if (msg_tlen < sizeof(struct olsr_tc))
 491                 goto trunc;
 492             ND_TCHECK2(*msg_data, sizeof(struct olsr_tc));
 493
 494             ptr.tc = (const struct olsr_tc *)msg_data;
 495             ND_PRINT((ndo, "\n\t    advertised neighbor seq 0x%04x",
 496                    EXTRACT_BE_U_2(ptr.tc->ans_seq)));
 497             msg_data += sizeof(struct olsr_tc);
 498             msg_tlen -= sizeof(struct olsr_tc);
 499
 500             if (msg_type == OLSR_TC_MSG) {
 501                 if (olsr_print_neighbor(ndo, msg_data, msg_tlen) == -1)
 502                     goto trunc;
 503             } else {
 504                 if (is_ipv6) {
 505                     if (olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen) == -1)
 506                         goto trunc;
 507                 } else {
 508                     if (olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen) == -1)
 509                         goto trunc;
 510                 }
 511             }
 512             break;
 513
 514         case OLSR_MID_MSG:
 515         {
 516             size_t addr_size = sizeof(struct in_addr);
 517
 518             if (is_ipv6)
 519                 addr_size = sizeof(struct in6_addr);
 520
 521             while (msg_tlen >= addr_size) {
 522                 ND_TCHECK2(*msg_data, addr_size);
 523                 ND_PRINT((ndo, "\n\t  interface address %s",
 524                         is_ipv6 ? ip6addr_string(ndo, msg_data) :
 525                         ipaddr_string(ndo, msg_data)));
 526
 527                 msg_data += addr_size;
 528                 msg_tlen -= addr_size;
 529             }
 530             break;
 531         }
 532
 533         case OLSR_HNA_MSG:
 534             if (is_ipv6)
 535             {
 536                 int i = 0;
 537
 538                 ND_PRINT((ndo, "\n\t  Advertised networks (total %u)",
 539                         (unsigned int) (msg_tlen / sizeof(struct olsr_hna6))));
 540
 541                 while (msg_tlen >= sizeof(struct olsr_hna6)) {
 542                     const struct olsr_hna6 *hna6;
 543
 544                     ND_TCHECK2(*msg_data, sizeof(struct olsr_hna6));
 545
 546                     hna6 = (const struct olsr_hna6 *)msg_data;
 547
 548                     ND_PRINT((ndo, "\n\t    #%i: %s/%u",
 549                             i, ip6addr_string(ndo, hna6->network),
 550                             mask62plen (hna6->mask)));
 551
 552                     msg_data += sizeof(struct olsr_hna6);
 553                     msg_tlen -= sizeof(struct olsr_hna6);
 554                 }
 555             }
 556             else
 557             {
 558                 int col = 0;
 559
 560                 ND_PRINT((ndo, "\n\t  Advertised networks (total %u)",
 561                         (unsigned int) (msg_tlen / sizeof(struct olsr_hna4))));
 562
 563                 while (msg_tlen >= sizeof(struct olsr_hna4)) {
 564                     ND_TCHECK2(*msg_data, sizeof(struct olsr_hna4));
 565
 566                     ptr.hna = (const struct olsr_hna4 *)msg_data;
 567
 568                     /* print 4 prefixes per line */
 569                     if (!ptr.hna->network[0] && !ptr.hna->network[1] &&
 570                         !ptr.hna->network[2] && !ptr.hna->network[3] &&
 571                         !ptr.hna->mask[GW_HNA_PAD] &&
 572                         ptr.hna->mask[GW_HNA_FLAGS]) {
 573                             /* smart gateway */
 574                             ND_PRINT((ndo, "%sSmart-Gateway:%s%s%s%s%s %u/%u",
 575                                 col == 0 ? "\n\t    " : ", ", /* indent */
 576                                 /* sgw */
 577                                 /* LINKSPEED */
 578                                 (ptr.hna->mask[GW_HNA_FLAGS] &
 579                                  GW_HNA_FLAG_LINKSPEED) ? " LINKSPEED" : "",
 580                                 /* IPV4 */
 581                                 (ptr.hna->mask[GW_HNA_FLAGS] &
 582                                  GW_HNA_FLAG_IPV4) ? " IPV4" : "",
 583                                 /* IPV4-NAT */
 584                                 (ptr.hna->mask[GW_HNA_FLAGS] &
 585                                  GW_HNA_FLAG_IPV4_NAT) ? " IPV4-NAT" : "",
 586                                 /* IPV6 */
 587                                 (ptr.hna->mask[GW_HNA_FLAGS] &
 588                                  GW_HNA_FLAG_IPV6) ? " IPV6" : "",
 589                                 /* IPv6PREFIX */
 590                                 (ptr.hna->mask[GW_HNA_FLAGS] &
 591                                  GW_HNA_FLAG_IPV6PREFIX) ? " IPv6-PREFIX" : "",
 592                                 /* uplink */
 593                                 (ptr.hna->mask[GW_HNA_FLAGS] &
 594                                  GW_HNA_FLAG_LINKSPEED) ?
 595                                  deserialize_gw_speed(ptr.hna->mask[GW_HNA_UPLINK]) : 0,
 596                                 /* downlink */
 597                                 (ptr.hna->mask[GW_HNA_FLAGS] &
 598                                  GW_HNA_FLAG_LINKSPEED) ?
 599                                  deserialize_gw_speed(ptr.hna->mask[GW_HNA_DOWNLINK]) : 0
 600                                 ));
 601                     } else {
 602                         /* normal route */
 603                         ND_PRINT((ndo, "%s%s/%u",
 604                                 col == 0 ? "\n\t    " : ", ",
 605                                 ipaddr_string(ndo, ptr.hna->network),
 606                                 mask2plen(EXTRACT_BE_U_4(ptr.hna->mask))));
 607                     }
 608
 609                     msg_data += sizeof(struct olsr_hna4);
 610                     msg_tlen -= sizeof(struct olsr_hna4);
 611
 612                     col = (col + 1) % 4;
 613                 }
 614             }
 615             break;
 616
 617         case OLSR_NAMESERVICE_MSG:
 618         {
 619             u_int name_entries;
 620             u_int addr_size;
 621             int name_entries_valid;
 622             u_int i;
 623
 624             if (msg_tlen < 4)
 625                 goto trunc;
 626             ND_TCHECK_4(msg_data);
 627
 628             name_entries = EXTRACT_BE_U_2(msg_data + 2);
 629             addr_size = 4;
 630             if (is_ipv6)
 631                 addr_size = 16;
 632
 633             name_entries_valid = 0;
 634             if ((name_entries > 0)
 635                     && ((name_entries * (4 + addr_size)) <= msg_tlen))
 636                 name_entries_valid = 1;
 637
 638             ND_PRINT((ndo, "\n\t  Version %u, Entries %u%s",
 639                    EXTRACT_BE_U_2(msg_data),
 640                    name_entries, (name_entries_valid == 0) ? " (invalid)" : ""));
 641
 642             if (name_entries_valid == 0)
 643                 break;
 644
 645             msg_data += 4;
 646             msg_tlen -= 4;
 647
 648             for (i = 0; i < name_entries; i++) {
 649                 int name_entry_len_valid = 0;
 650
 651                 if (msg_tlen < 4)
 652                     break;
 653                 ND_TCHECK_4(msg_data);
 654
 655                 name_entry_type = EXTRACT_BE_U_2(msg_data);
 656                 name_entry_len = EXTRACT_BE_U_2(msg_data + 2);
 657
 658                 msg_data += 4;
 659                 msg_tlen -= 4;
 660
 661                 if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
 662                     name_entry_len_valid = 1;
 663
 664                 ND_PRINT((ndo, "\n\t    #%u: type %#06x, length %u%s",
 665                         (unsigned int) i, name_entry_type,
 666                         name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : ""));
 667
 668                 if (name_entry_len_valid == 0)
 669                     break;
 670
 671                 /* 32-bit alignment */
 672                 name_entry_padding = 0;
 673                 if (name_entry_len%4 != 0)
 674                     name_entry_padding = 4-(name_entry_len%4);
 675
 676                 if (msg_tlen < addr_size + name_entry_len + name_entry_padding)
 677                     goto trunc;
 678
 679                 ND_TCHECK2(*msg_data, addr_size + name_entry_len + name_entry_padding);
 680
 681                 if (is_ipv6)
 682                     ND_PRINT((ndo, ", address %s, name \"",
 683                             ip6addr_string(ndo, msg_data)));
 684                 else
 685                     ND_PRINT((ndo, ", address %s, name \"",
 686                             ipaddr_string(ndo, msg_data)));
 687                 (void)fn_printn(ndo, msg_data + addr_size, name_entry_len, NULL);
 688                 ND_PRINT((ndo, "\""));
 689
 690                 msg_data += addr_size + name_entry_len + name_entry_padding;
 691                 msg_tlen -= addr_size + name_entry_len + name_entry_padding;
 692             } /* for (i = 0; i < name_entries; i++) */
 693             break;
 694         } /* case OLSR_NAMESERVICE_MSG */
 695
 696             /*
 697              * FIXME those are the defined messages that lack a decoder
 698              * you are welcome to contribute code ;-)
 699              */
 700         case OLSR_POWERINFO_MSG:
 701         default:
 702             print_unknown_data(ndo, msg_data, "\n\t    ", msg_tlen);
 703             break;
 704         } /* switch (msg_type) */
 705         tptr += msg_len;
 706     } /* while (tptr < (pptr+length)) */
 707
 708     return;
 709
 710  trunc:
 711     ND_PRINT((ndo, "[|olsr]"));
 712 }
 713
 714 /*
 715  * Local Variables:
 716  * c-style: whitesmith
 717  * c-basic-offset: 4
 718  * End:
 719  */