The Tcpdump Group git mirrors - tcpdump/blob - print-aodv.c

   1 /*
   2  * Copyright (c) 2003 Bruce M. Simpson <bms@spc.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *        This product includes software developed by Bruce M. Simpson.
  16  * 4. Neither the name of Bruce M. Simpson nor the names of co-
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bruce M. Simpson AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL Bruce M. Simpson OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifndef lint
  34 static const char rcsid[] _U_ =
  35     "@(#) $Header: /tcpdump/master/tcpdump/print-aodv.c,v 1.11 2004-03-24 00:30:19 guy Exp $ (LBL)";
  36 #endif
  37
  38 #ifdef HAVE_CONFIG_H
  39 #include "config.h"
  40 #endif
  41
  42 #include <tcpdump-stdinc.h>
  43
  44 #include <stddef.h>
  45 #include <stdio.h>
  46 #include <ctype.h>
  47 #include <string.h>
  48
  49 #include "interface.h"
  50 #include "addrtoname.h"
  51 #include "extract.h"                    /* must come after interface.h */
  52
  53 #include "aodv.h"
  54
  55 static void
  56 aodv_extension(const struct aodv_ext *ep, u_int length)
  57 {
  58         u_int i;
  59         const struct aodv_hello *ah;
  60
  61         switch (ep->type) {
  62         case AODV_EXT_HELLO:
  63                 if (snapend < (u_char *) ep) {
  64                         printf(" [|hello]");
  65                         return;
  66                 }
  67                 i = min(length, (u_int)(snapend - (u_char *)ep));
  68                 if (i < sizeof(struct aodv_hello)) {
  69                         printf(" [|hello]");
  70                         return;
  71                 }
  72                 i -= sizeof(struct aodv_hello);
  73                 ah = (void *)ep;
  74                 printf("\n\text HELLO %ld ms",
  75                     (unsigned long)EXTRACT_32BITS(&ah->interval));
  76                 break;
  77
  78         default:
  79                 printf("\n\text %u %u", ep->type, ep->length);
  80                 break;
  81         }
  82 }
  83
  84 static void
  85 aodv_rreq(const struct aodv_rreq *ap, const u_char *dat, u_int length)
  86 {
  87         u_int i;
  88
  89         if (snapend < dat) {
  90                 printf(" [|aodv]");
  91                 return;
  92         }
  93         i = min(length, (u_int)(snapend - dat));
  94         if (i < sizeof(*ap)) {
  95                 printf(" [|rreq]");
  96                 return;
  97         }
  98         i -= sizeof(*ap);
  99         printf(" rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
 100             "\tdst %s seq %lu src %s seq %lu", length,
 101             ap->rreq_type & RREQ_JOIN ? "[J]" : "",
 102             ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
 103             ap->rreq_type & RREQ_GRAT ? "[G]" : "",
 104             ap->rreq_type & RREQ_DEST ? "[D]" : "",
 105             ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
 106             ap->rreq_hops,
 107             (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
 108             ipaddr_string(&ap->rreq_da),
 109             (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
 110             ipaddr_string(&ap->rreq_oa),
 111             (unsigned long)EXTRACT_32BITS(&ap->rreq_os));
 112         if (i >= sizeof(struct aodv_ext))
 113                 aodv_extension((void *)(ap + 1), i);
 114 }
 115
 116 static void
 117 aodv_rrep(const struct aodv_rrep *ap, const u_char *dat, u_int length)
 118 {
 119         u_int i;
 120
 121         if (snapend < dat) {
 122                 printf(" [|aodv]");
 123                 return;
 124         }
 125         i = min(length, (u_int)(snapend - dat));
 126         if (i < sizeof(*ap)) {
 127                 printf(" [|rrep]");
 128                 return;
 129         }
 130         i -= sizeof(*ap);
 131         printf(" rrep %u %s%sprefix %u hops %u\n"
 132             "\tdst %s dseq %lu src %s %lu ms", length,
 133             ap->rrep_type & RREP_REPAIR ? "[R]" : "",
 134             ap->rrep_type & RREP_ACK ? "[A] " : " ",
 135             ap->rrep_ps & RREP_PREFIX_MASK,
 136             ap->rrep_hops,
 137             ipaddr_string(&ap->rrep_da),
 138             (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
 139             ipaddr_string(&ap->rrep_oa),
 140             (unsigned long)EXTRACT_32BITS(&ap->rrep_life));
 141         if (i >= sizeof(struct aodv_ext))
 142                 aodv_extension((void *)(ap + 1), i);
 143 }
 144
 145 static void
 146 aodv_rerr(const struct aodv_rerr *ap, const u_char *dat, u_int length)
 147 {
 148         u_int i;
 149         const struct rerr_unreach *dp = NULL;
 150         int n, trunc;
 151
 152         if (snapend < dat) {
 153                 printf(" [|aodv]");
 154                 return;
 155         }
 156         i = min(length, (u_int)(snapend - dat));
 157         if (i < offsetof(struct aodv_rerr, r)) {
 158                 printf(" [|rerr]");
 159                 return;
 160         }
 161         i -= offsetof(struct aodv_rerr, r);
 162         dp = &ap->r.dest[0];
 163         n = ap->rerr_dc * sizeof(ap->r.dest[0]);
 164         printf(" rerr %s [items %u] [%u]:",
 165             ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
 166             ap->rerr_dc, length);
 167         trunc = n - (i/sizeof(ap->r.dest[0]));
 168         for (; i >= sizeof(ap->r.dest[0]);
 169             ++dp, i -= sizeof(ap->r.dest[0])) {
 170                 printf(" {%s}(%ld)", ipaddr_string(&dp->u_da),
 171                     (unsigned long)EXTRACT_32BITS(&dp->u_ds));
 172         }
 173         if (trunc)
 174                 printf("[|rerr]");
 175 }
 176
 177 static void
 178 #ifdef INET6
 179 aodv_v6_rreq(const struct aodv_rreq6 *ap, const u_char *dat, u_int length)
 180 #else
 181 aodv_v6_rreq(const struct aodv_rreq6 *ap _U_, const u_char *dat _U_, u_int length)
 182 #endif
 183 {
 184 #ifdef INET6
 185         u_int i;
 186
 187         if (snapend < dat) {
 188                 printf(" [|aodv]");
 189                 return;
 190         }
 191         i = min(length, (u_int)(snapend - dat));
 192         if (i < sizeof(*ap)) {
 193                 printf(" [|rreq6]");
 194                 return;
 195         }
 196         i -= sizeof(*ap);
 197         printf(" v6 rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
 198             "\tdst %s seq %lu src %s seq %lu", length,
 199             ap->rreq_type & RREQ_JOIN ? "[J]" : "",
 200             ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
 201             ap->rreq_type & RREQ_GRAT ? "[G]" : "",
 202             ap->rreq_type & RREQ_DEST ? "[D]" : "",
 203             ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
 204             ap->rreq_hops,
 205             (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
 206             ip6addr_string(&ap->rreq_da),
 207             (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
 208             ip6addr_string(&ap->rreq_oa),
 209             (unsigned long)EXTRACT_32BITS(&ap->rreq_os));
 210         if (i >= sizeof(struct aodv_ext))
 211                 aodv_extension((void *)(ap + 1), i);
 212 #else
 213         printf(" v6 rreq %u", length);
 214 #endif
 215 }
 216
 217 static void
 218 #ifdef INET6
 219 aodv_v6_rrep(const struct aodv_rrep6 *ap, const u_char *dat, u_int length)
 220 #else
 221 aodv_v6_rrep(const struct aodv_rrep6 *ap _U_, const u_char *dat _U_, u_int length)
 222 #endif
 223 {
 224 #ifdef INET6
 225         u_int i;
 226
 227         if (snapend < dat) {
 228                 printf(" [|aodv]");
 229                 return;
 230         }
 231         i = min(length, (u_int)(snapend - dat));
 232         if (i < sizeof(*ap)) {
 233                 printf(" [|rrep6]");
 234                 return;
 235         }
 236         i -= sizeof(*ap);
 237         printf(" rrep %u %s%sprefix %u hops %u\n"
 238            "\tdst %s dseq %lu src %s %lu ms", length,
 239             ap->rrep_type & RREP_REPAIR ? "[R]" : "",
 240             ap->rrep_type & RREP_ACK ? "[A] " : " ",
 241             ap->rrep_ps & RREP_PREFIX_MASK,
 242             ap->rrep_hops,
 243             ip6addr_string(&ap->rrep_da),
 244             (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
 245             ip6addr_string(&ap->rrep_oa),
 246             (unsigned long)EXTRACT_32BITS(&ap->rrep_life));
 247         if (i >= sizeof(struct aodv_ext))
 248                 aodv_extension((void *)(ap + 1), i);
 249 #else
 250         printf(" rrep %u", length);
 251 #endif
 252 }
 253
 254 static void
 255 #ifdef INET6
 256 aodv_v6_rerr(const struct aodv_rerr *ap, u_int length)
 257 #else
 258 aodv_v6_rerr(const struct aodv_rerr *ap _U_, u_int length)
 259 #endif
 260 {
 261 #ifdef INET6
 262         const struct rerr_unreach6 *dp6 = NULL;
 263         int i, j, n, trunc;
 264
 265         i = length - offsetof(struct aodv_rerr, r);
 266         j = sizeof(ap->r.dest6[0]);
 267         dp6 = &ap->r.dest6[0];
 268         n = ap->rerr_dc * j;
 269         printf(" rerr %s [items %u] [%u]:",
 270             ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
 271             ap->rerr_dc, length);
 272         trunc = n - (i/j);
 273         for (; i -= j >= 0; ++dp6) {
 274                 printf(" {%s}(%ld)", ip6addr_string(&dp6->u_da),
 275                     (unsigned long)EXTRACT_32BITS(&dp6->u_ds));
 276         }
 277         if (trunc)
 278                 printf("[|rerr]");
 279 #else
 280         printf(" rerr %u", length);
 281 #endif
 282 }
 283
 284 static void
 285 #ifdef INET6
 286 aodv_v6_draft_01_rreq(const struct aodv_rreq6_draft_01 *ap, const u_char *dat, u_int length)
 287 #else
 288 aodv_v6_draft_01_rreq(const struct aodv_rreq6_draft_01 *ap _U_, const u_char *dat _U_, u_int length)
 289 #endif
 290 {
 291 #ifdef INET6
 292         u_int i;
 293
 294         if (snapend < dat) {
 295                 printf(" [|aodv]");
 296                 return;
 297         }
 298         i = min(length, (u_int)(snapend - dat));
 299         if (i < sizeof(*ap)) {
 300                 printf(" [|rreq6]");
 301                 return;
 302         }
 303         i -= sizeof(*ap);
 304         printf(" rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
 305             "\tdst %s seq %lu src %s seq %lu", length,
 306             ap->rreq_type & RREQ_JOIN ? "[J]" : "",
 307             ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
 308             ap->rreq_type & RREQ_GRAT ? "[G]" : "",
 309             ap->rreq_type & RREQ_DEST ? "[D]" : "",
 310             ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
 311             ap->rreq_hops,
 312             (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
 313             ip6addr_string(&ap->rreq_da),
 314             (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
 315             ip6addr_string(&ap->rreq_oa),
 316             (unsigned long)EXTRACT_32BITS(&ap->rreq_os));
 317         if (i >= sizeof(struct aodv_ext))
 318                 aodv_extension((void *)(ap + 1), i);
 319 #else
 320         printf(" rreq %u", length);
 321 #endif
 322 }
 323
 324 static void
 325 #ifdef INET6
 326 aodv_v6_draft_01_rrep(const struct aodv_rrep6_draft_01 *ap, const u_char *dat, u_int length)
 327 #else
 328 aodv_v6_draft_01_rrep(const struct aodv_rrep6_draft_01 *ap _U_, const u_char *dat _U_, u_int length)
 329 #endif
 330 {
 331 #ifdef INET6
 332         u_int i;
 333
 334         if (snapend < dat) {
 335                 printf(" [|aodv]");
 336                 return;
 337         }
 338         i = min(length, (u_int)(snapend - dat));
 339         if (i < sizeof(*ap)) {
 340                 printf(" [|rrep6]");
 341                 return;
 342         }
 343         i -= sizeof(*ap);
 344         printf(" rrep %u %s%sprefix %u hops %u\n"
 345            "\tdst %s dseq %lu src %s %lu ms", length,
 346             ap->rrep_type & RREP_REPAIR ? "[R]" : "",
 347             ap->rrep_type & RREP_ACK ? "[A] " : " ",
 348             ap->rrep_ps & RREP_PREFIX_MASK,
 349             ap->rrep_hops,
 350             ip6addr_string(&ap->rrep_da),
 351             (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
 352             ip6addr_string(&ap->rrep_oa),
 353             (unsigned long)EXTRACT_32BITS(&ap->rrep_life));
 354         if (i >= sizeof(struct aodv_ext))
 355                 aodv_extension((void *)(ap + 1), i);
 356 #else
 357         printf(" rrep %u", length);
 358 #endif
 359 }
 360
 361 static void
 362 #ifdef INET6
 363 aodv_v6_draft_01_rerr(const struct aodv_rerr *ap, u_int length)
 364 #else
 365 aodv_v6_draft_01_rerr(const struct aodv_rerr *ap _U_, u_int length)
 366 #endif
 367 {
 368 #ifdef INET6
 369         const struct rerr_unreach6_draft_01 *dp6 = NULL;
 370         int i, j, n, trunc;
 371
 372         i = length - offsetof(struct aodv_rerr, r);
 373         j = sizeof(ap->r.dest6_draft_01[0]);
 374         dp6 = &ap->r.dest6_draft_01[0];
 375         n = ap->rerr_dc * j;
 376         printf(" rerr %s [items %u] [%u]:",
 377             ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
 378             ap->rerr_dc, length);
 379         trunc = n - (i/j);
 380         for (; i -= j >= 0; ++dp6) {
 381                 printf(" {%s}(%ld)", ip6addr_string(&dp6->u_da),
 382                     (unsigned long)EXTRACT_32BITS(&dp6->u_ds));
 383         }
 384         if (trunc)
 385                 printf("[|rerr]");
 386 #else
 387         printf(" rerr %u", length);
 388 #endif
 389 }
 390
 391 void
 392 aodv_print(const u_char *dat, u_int length, int is_ip6)
 393 {
 394         uint8_t msg_type;
 395
 396         /*
 397          * The message type is the first byte; make sure we have it
 398          * and then fetch it.
 399          */
 400         TCHECK(*dat);
 401         msg_type = *dat;
 402         printf(" aodv");
 403
 404         switch (msg_type) {
 405
 406         case AODV_RREQ:
 407                 if (is_ip6)
 408                         aodv_v6_rreq((const struct aodv_rreq6 *)dat, dat, length);
 409                 else
 410                         aodv_rreq((const struct aodv_rreq *)dat, dat, length);
 411                 break;
 412
 413         case AODV_RREP:
 414                 if (is_ip6)
 415                         aodv_v6_rrep((const struct aodv_rrep6 *)dat, dat, length);
 416                 else
 417                         aodv_rrep((const struct aodv_rrep *)dat, dat, length);
 418                 break;
 419
 420         case AODV_RERR:
 421                 if (is_ip6)
 422                         aodv_v6_rerr((const struct aodv_rerr *)dat, length);
 423                 else
 424                         aodv_rerr((const struct aodv_rerr *)dat, dat, length);
 425                 break;
 426
 427         case AODV_RREP_ACK:
 428                 printf(" rrep-ack %u", length);
 429                 break;
 430
 431         case AODV_V6_DRAFT_01_RREQ:
 432                 aodv_v6_draft_01_rreq((const struct aodv_rreq6_draft_01 *)dat, dat, length);
 433                 break;
 434
 435         case AODV_V6_DRAFT_01_RREP:
 436                 aodv_v6_draft_01_rrep((const struct aodv_rrep6_draft_01 *)dat, dat, length);
 437                 break;
 438
 439         case AODV_V6_DRAFT_01_RERR:
 440                 aodv_v6_draft_01_rerr((const struct aodv_rerr *)dat, length);
 441                 break;
 442
 443         case AODV_V6_DRAFT_01_RREP_ACK:
 444                 printf(" rrep-ack %u", length);
 445                 break;
 446
 447         default:
 448                 printf(" type %u %u", msg_type, length);
 449         }
 450         return;
 451
 452 trunc:
 453         printf(" [|aodv]");
 454 }