epan/dissectors/packet-aodv.c

   1 /* packet-aodv.c
   2  * Routines for AODV dissection
   3  * Copyright 2000, Erik Nordstrom <erik.nordstrom@it.uu.se>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #ifdef HAVE_STDDEF_H
  31 #include <stddef.h>
  32 #endif
  33 #include <string.h>
  34
  35 #include <glib.h>
  36
  37 #include <epan/packet.h>
  38
  39 #ifndef offsetof
  40 #define offsetof(type, member)  ((size_t)(&((type *)0)->member))
  41 #endif
  42
  43 /*
  44  * See
  45  *
  46  *      RFC 3561 (which indicates that, for IPv6, the only change is that
  47  *      the address fields are enlarged)
  48  *
  49  *      http://www.cs.ucsb.edu/~ebelding/txt/aodv6.txt
  50  *
  51  *      http://www.tcs.hut.fi/~anttit/manet/drafts/draft-perkins-aodv6-01.txt
  52  *
  53  *      (both of the above two are draft-perkins-manet-aodv6-01.txt, which
  54  *      is from November 2000)
  55  */
  56
  57 #define INET6_ADDRLEN   16
  58 #define UDP_PORT_AODV   654
  59
  60 /* Message Types */
  61 #define RREQ                    1
  62 #define RREP                    2
  63 #define RERR                    3
  64 #define RREP_ACK                4
  65 #define DRAFT_01_V6_RREQ        16
  66 #define DRAFT_01_V6_RREP        17
  67 #define DRAFT_01_V6_RERR        18
  68 #define DRAFT_01_V6_RREP_ACK    19
  69
  70 /* Extension Types */
  71 #define AODV_EXT        1
  72 #define AODV_EXT_INT    2
  73 #define AODV_EXT_NTP    3
  74
  75 /* Flag bits: */
  76 #define RREQ_UNKNSEQ    0x08
  77 #define RREQ_DESTONLY   0x10
  78 #define RREQ_GRATRREP   0x20
  79 #define RREQ_REP        0x40
  80 #define RREQ_JOIN       0x80
  81
  82 #define RREP_ACK_REQ    0x40
  83 #define RREP_REP        0x80
  84
  85 #define RERR_NODEL      0x80
  86
  87 static const value_string type_vals[] = {
  88     { RREQ,                 "Route Request" },
  89     { RREP,                 "Route Reply" },
  90     { RERR,                 "Route Error" },
  91     { RREP_ACK,             "Route Reply Acknowledgment"},
  92     { DRAFT_01_V6_RREQ,     "draft-perkins-manet-aodv6-01 IPv6 Route Request"},
  93     { DRAFT_01_V6_RREP,     "draft-perkins-manet-aodv6-01 IPv6 Route Reply"},
  94     { DRAFT_01_V6_RERR,     "draft-perkins-manet-aodv6-01 IPv6 Route Error"},
  95     { DRAFT_01_V6_RREP_ACK, "draft-perkins-manet-aodv6-01 IPv6 Route Reply Acknowledgment"},
  96     { 0,                    NULL }
  97 };
  98
  99 static const value_string exttype_vals[] = {
 100     { AODV_EXT,     "None"},
 101     { AODV_EXT_INT, "Hello Interval"},
 102     { AODV_EXT_NTP, "Timestamp"},
 103     { 0,            NULL}
 104 };
 105
 106 typedef struct v6_ext {
 107     guint8 type;
 108     guint8 length;
 109 } aodv_ext_t;
 110
 111 /* Initialize the protocol and registered fields */
 112 static int proto_aodv = -1;
 113 static int hf_aodv_type = -1;
 114 static int hf_aodv_flags = -1;
 115 static int hf_aodv_prefix_sz = -1;
 116 static int hf_aodv_hopcount = -1;
 117 static int hf_aodv_rreq_id = -1;
 118 static int hf_aodv_dest_ip = -1;
 119 static int hf_aodv_dest_ipv6 = -1;
 120 static int hf_aodv_dest_seqno = -1;
 121 static int hf_aodv_orig_ip = -1;
 122 static int hf_aodv_orig_ipv6 = -1;
 123 static int hf_aodv_orig_seqno = -1;
 124 static int hf_aodv_lifetime = -1;
 125 static int hf_aodv_destcount = -1;
 126 static int hf_aodv_unreach_dest_ip = -1;
 127 static int hf_aodv_unreach_dest_ipv6 = -1;
 128 static int hf_aodv_unreach_dest_seqno = -1;
 129 static int hf_aodv_flags_rreq_join = -1;
 130 static int hf_aodv_flags_rreq_repair = -1;
 131 static int hf_aodv_flags_rreq_gratuitous = -1;
 132 static int hf_aodv_flags_rreq_destinationonly = -1;
 133 static int hf_aodv_flags_rreq_unknown = -1;
 134 static int hf_aodv_flags_rrep_repair = -1;
 135 static int hf_aodv_flags_rrep_ack = -1;
 136 static int hf_aodv_flags_rerr_nodelete = -1;
 137 static int hf_aodv_ext_type = -1;
 138 static int hf_aodv_ext_length = -1;
 139 static int hf_aodv_ext_interval = -1;
 140 static int hf_aodv_ext_timestamp = -1;
 141
 142 /* Initialize the subtree pointers */
 143 static gint ett_aodv = -1;
 144 static gint ett_aodv_flags = -1;
 145 static gint ett_aodv_unreach_dest = -1;
 146 static gint ett_aodv_extensions = -1;
 147
 148 /* Code to actually dissect the packets */
 149
 150 static void
 151 dissect_aodv_ext(tvbuff_t * tvb, int offset, proto_tree * tree)
 152 {
 153     proto_tree *ext_tree;
 154     proto_item *ti;
 155     guint8 type, len;
 156
 157     if (!tree)
 158         return;
 159
 160   again:
 161     if ((int) tvb_reported_length(tvb) <= offset)
 162         return;                 /* No more options left */
 163
 164     type = tvb_get_guint8(tvb, offset);
 165     len = tvb_get_guint8(tvb, offset + 1);
 166
 167     ti = proto_tree_add_text(tree, tvb, offset, 2 + len, "Extensions");
 168     ext_tree = proto_item_add_subtree(ti, ett_aodv_extensions);
 169
 170     proto_tree_add_text(ext_tree, tvb, offset, 1,
 171                         "Type: %u (%s)", type,
 172                         val_to_str(type, exttype_vals, "Unknown"));
 173
 174     if (len == 0) {
 175         proto_tree_add_text(ext_tree, tvb, offset + 1, 1,
 176                             "Invalid option length: %u", len);
 177         return;                 /* we must not try to decode this */
 178     }
 179     proto_tree_add_text(ext_tree, tvb, offset + 1, 1,
 180                         "Length: %u bytes", len);
 181
 182     offset += 2;
 183
 184     switch (type) {
 185     case AODV_EXT_INT:
 186         proto_tree_add_uint(ext_tree, hf_aodv_ext_interval,
 187                             tvb, offset, 4, tvb_get_ntohl(tvb, offset));
 188         break;
 189     case AODV_EXT_NTP:
 190         proto_tree_add_item(ext_tree, hf_aodv_ext_timestamp,
 191                             tvb, offset, 8, FALSE);
 192         break;
 193     default:
 194         break;
 195     }
 196     /* If multifield extensions appear, we need more
 197      * sophisticated handler.  For now, this is okay. */
 198
 199     offset += len;
 200     goto again;
 201 }
 202
 203 static void
 204 dissect_aodv_rreq(tvbuff_t *tvb, packet_info *pinfo, proto_tree *aodv_tree,
 205                   proto_item *ti, gboolean is_ipv6)
 206 {
 207     int offset = 1;
 208     proto_item *tj;
 209     proto_tree *aodv_flags_tree;
 210     guint8 flags;
 211     guint8 hop_count;
 212     guint32 rreq_id;
 213     guint32 dest_addr_v4;
 214     struct e_in6_addr dest_addr_v6;
 215     guint32 dest_seqno;
 216     guint32 orig_addr_v4;
 217     struct e_in6_addr orig_addr_v6;
 218     guint32 orig_seqno;
 219     int extlen;
 220
 221     flags = tvb_get_guint8(tvb, offset);
 222     if (aodv_tree) {
 223         tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
 224         aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
 225         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_join,
 226                                tvb, offset, 1, flags);
 227         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_repair,
 228                                tvb, offset, 1, flags);
 229         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_gratuitous,
 230                                tvb, offset, 1, flags);
 231         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_destinationonly,
 232                                tvb, offset, 1, flags);
 233         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_unknown,
 234                                tvb, offset, 1, flags);
 235         if (flags & RREQ_JOIN)
 236             proto_item_append_text(tj, " J");
 237         if (flags & RREQ_REP)
 238             proto_item_append_text(tj, " R");
 239         if (flags & RREQ_GRATRREP)
 240             proto_item_append_text(tj, " G");
 241         if (flags & RREQ_DESTONLY)
 242             proto_item_append_text(tj, " D");
 243         if (flags & RREQ_UNKNSEQ)
 244             proto_item_append_text(tj, " U");
 245     }
 246     offset += 2;        /* skip reserved byte */
 247
 248     hop_count = tvb_get_guint8(tvb, offset);
 249     if (aodv_tree)
 250         proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
 251                             hop_count);
 252     offset += 1;
 253
 254     rreq_id = tvb_get_ntohl(tvb, offset);
 255     if (aodv_tree)
 256         proto_tree_add_uint(aodv_tree, hf_aodv_rreq_id, tvb, offset, 4,
 257                             rreq_id);
 258     offset += 4;
 259
 260     if (is_ipv6) {
 261         tvb_get_ipv6(tvb, offset, &dest_addr_v6);
 262         if (aodv_tree) {
 263             proto_tree_add_ipv6(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
 264                                 INET6_ADDRLEN, (guint8 *)&dest_addr_v6);
 265             proto_item_append_text(ti, ", Dest IP: %s",
 266                                    ip6_to_str(&dest_addr_v6));
 267         }
 268         if (check_col(pinfo->cinfo, COL_INFO))
 269             col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
 270                             ip6_to_str(&dest_addr_v6));
 271         offset += INET6_ADDRLEN;
 272     } else {
 273         dest_addr_v4 = tvb_get_ipv4(tvb, offset);
 274         if (aodv_tree) {
 275             proto_tree_add_ipv4(aodv_tree, hf_aodv_dest_ip, tvb, offset, 4,
 276                                 dest_addr_v4);
 277             proto_item_append_text(ti, ", Dest IP: %s",
 278                                    ip_to_str((guint8 *)&dest_addr_v4));
 279         }
 280         if (check_col(pinfo->cinfo, COL_INFO))
 281             col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
 282                             ip_to_str((guint8 *)&dest_addr_v4));
 283         offset += 4;
 284     }
 285
 286     dest_seqno = tvb_get_ntohl(tvb, offset);
 287     if (aodv_tree)
 288         proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
 289                             dest_seqno);
 290     offset += 4;
 291
 292     if (is_ipv6) {
 293         tvb_get_ipv6(tvb, offset, &orig_addr_v6);
 294         if (aodv_tree) {
 295             proto_tree_add_ipv6(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
 296                                 INET6_ADDRLEN, (guint8 *)&orig_addr_v6);
 297             proto_item_append_text(ti, ", Orig IP: %s",
 298                                    ip6_to_str(&orig_addr_v6));
 299         }
 300         if (check_col(pinfo->cinfo, COL_INFO))
 301             col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
 302                             ip6_to_str(&orig_addr_v6));
 303         offset += INET6_ADDRLEN;
 304     } else {
 305         orig_addr_v4 = tvb_get_ipv4(tvb, offset);
 306         if (aodv_tree) {
 307             proto_tree_add_ipv4(aodv_tree, hf_aodv_orig_ip, tvb, offset, 4,
 308                                 orig_addr_v4);
 309             proto_item_append_text(ti, ", Orig IP: %s",
 310                                    ip_to_str((guint8 *)&orig_addr_v4));
 311         }
 312         if (check_col(pinfo->cinfo, COL_INFO))
 313             col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
 314                             ip_to_str((guint8 *)&orig_addr_v4));
 315         offset += 4;
 316     }
 317
 318     orig_seqno = tvb_get_ntohl(tvb, offset);
 319     if (aodv_tree)
 320         proto_tree_add_uint(aodv_tree, hf_aodv_orig_seqno, tvb, offset, 4,
 321                             orig_seqno);
 322     if (check_col(pinfo->cinfo, COL_INFO))
 323         col_append_fstr(pinfo->cinfo, COL_INFO, " Id=%u Hcnt=%u DSN=%u OSN=%u",
 324                         rreq_id,
 325                         hop_count,
 326                         dest_seqno,
 327                         orig_seqno);
 328     offset += 4;
 329
 330     if (aodv_tree) {
 331         extlen = tvb_reported_length_remaining(tvb, offset);
 332         if (extlen > 0)
 333             dissect_aodv_ext(tvb, offset, aodv_tree);
 334     }
 335 }
 336
 337 static void
 338 dissect_aodv_rrep(tvbuff_t *tvb, packet_info *pinfo, proto_tree *aodv_tree,
 339                   proto_item *ti, gboolean is_ipv6)
 340 {
 341     int offset = 1;
 342     proto_item *tj;
 343     proto_tree *aodv_flags_tree;
 344     guint8 flags;
 345     guint8 prefix_sz;
 346     guint8 hop_count;
 347     guint32 dest_addr_v4;
 348     struct e_in6_addr dest_addr_v6;
 349     guint32 dest_seqno;
 350     guint32 orig_addr_v4;
 351     struct e_in6_addr orig_addr_v6;
 352     guint32 lifetime;
 353     int extlen;
 354
 355     flags = tvb_get_guint8(tvb, offset);
 356     if (aodv_tree) {
 357         tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
 358         aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
 359         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rrep_repair,
 360                                tvb, offset, 1, flags);
 361         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rrep_ack, tvb,
 362                                offset, 1, flags);
 363         if (flags & RREP_REP)
 364             proto_item_append_text(tj, " R");
 365         if (flags & RREP_ACK_REQ)
 366             proto_item_append_text(tj, " A");
 367     }
 368     offset += 1;
 369
 370     prefix_sz = tvb_get_guint8(tvb, offset) & 0x1F;
 371     if (aodv_tree)
 372         proto_tree_add_uint(aodv_tree, hf_aodv_prefix_sz, tvb, offset, 1,
 373                             prefix_sz);
 374     offset += 1;
 375
 376     hop_count = tvb_get_guint8(tvb, offset);
 377     if (aodv_tree)
 378         proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
 379                             hop_count);
 380     offset += 1;
 381
 382     if (is_ipv6) {
 383         tvb_get_ipv6(tvb, offset, &dest_addr_v6);
 384         if (aodv_tree) {
 385             proto_tree_add_ipv6(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
 386                                 INET6_ADDRLEN, (guint8 *)&dest_addr_v6);
 387             proto_item_append_text(ti, ", Dest IP: %s",
 388                                    ip6_to_str(&dest_addr_v6));
 389         }
 390         if (check_col(pinfo->cinfo, COL_INFO))
 391             col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
 392                             ip6_to_str(&dest_addr_v6));
 393         offset += INET6_ADDRLEN;
 394     } else {
 395         dest_addr_v4 = tvb_get_ipv4(tvb, offset);
 396         if (aodv_tree) {
 397             proto_tree_add_ipv4(aodv_tree, hf_aodv_dest_ip, tvb, offset, 4,
 398                                 dest_addr_v4);
 399             proto_item_append_text(ti, ", Dest IP: %s",
 400                                    ip_to_str((guint8 *)&dest_addr_v4));
 401         }
 402         if (check_col(pinfo->cinfo, COL_INFO))
 403             col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
 404                             ip_to_str((guint8 *)&dest_addr_v4));
 405         offset += 4;
 406     }
 407
 408     dest_seqno = tvb_get_ntohl(tvb, offset);
 409     if (aodv_tree)
 410         proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
 411                             dest_seqno);
 412     offset += 4;
 413
 414     if (is_ipv6) {
 415         tvb_get_ipv6(tvb, offset, &orig_addr_v6);
 416         if (aodv_tree) {
 417             proto_tree_add_ipv6(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
 418                                 INET6_ADDRLEN, (guint8 *)&orig_addr_v6);
 419             proto_item_append_text(ti, ", Orig IP: %s",
 420                                    ip6_to_str(&orig_addr_v6));
 421         }
 422         if (check_col(pinfo->cinfo, COL_INFO))
 423             col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
 424                             ip6_to_str(&orig_addr_v6));
 425         offset += INET6_ADDRLEN;
 426     } else {
 427         orig_addr_v4 = tvb_get_ipv4(tvb, offset);
 428         if (aodv_tree) {
 429             proto_tree_add_ipv4(aodv_tree, hf_aodv_orig_ip, tvb, offset, 4,
 430                                 orig_addr_v4);
 431             proto_item_append_text(ti, ", Orig IP: %s",
 432                                    ip_to_str((guint8 *)&orig_addr_v4));
 433         }
 434         if (check_col(pinfo->cinfo, COL_INFO))
 435             col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
 436                             ip_to_str((guint8 *)&orig_addr_v4));
 437         offset += 4;
 438     }
 439
 440     lifetime = tvb_get_ntohl(tvb, offset);
 441     if (aodv_tree) {
 442         proto_tree_add_uint(aodv_tree, hf_aodv_lifetime, tvb, offset, 4,
 443                             lifetime);
 444         proto_item_append_text(ti, ", Lifetime=%u", lifetime);
 445     }
 446     if (check_col(pinfo->cinfo, COL_INFO))
 447         col_append_fstr(pinfo->cinfo, COL_INFO, " Hcnt=%u DSN=%u Lifetime=%u",
 448                         hop_count,
 449                         dest_seqno,
 450                         lifetime);
 451     offset += 4;
 452
 453     if (aodv_tree) {
 454         extlen = tvb_reported_length_remaining(tvb, offset);
 455         if (extlen > 0)
 456             dissect_aodv_ext(tvb, offset, aodv_tree);
 457     }
 458 }
 459
 460 static void
 461 dissect_aodv_rerr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *aodv_tree,
 462                   gboolean is_ipv6)
 463 {
 464     int offset = 1;
 465     proto_item *tj;
 466     proto_tree *aodv_flags_tree;
 467     proto_tree *aodv_unreach_dest_tree;
 468     guint8 flags;
 469     guint8 dest_count;
 470     int i;
 471
 472     flags = tvb_get_guint8(tvb, offset);
 473     if (aodv_tree) {
 474         tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
 475         aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
 476         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rerr_nodelete,
 477                                tvb, offset, 1, flags);
 478         if (flags & RERR_NODEL)
 479             proto_item_append_text(tj, " N");
 480     }
 481     offset += 2;        /* skip reserved byte */
 482
 483     dest_count = tvb_get_guint8(tvb, offset);
 484     if (aodv_tree)
 485         proto_tree_add_uint(aodv_tree, hf_aodv_destcount, tvb, offset, 1,
 486                             dest_count);
 487     if (check_col(pinfo->cinfo, COL_INFO))
 488         col_append_fstr(pinfo->cinfo, COL_INFO, ", Dest Count=%u",
 489                         dest_count);
 490     offset += 1;
 491
 492     if (is_ipv6) {
 493         tj = proto_tree_add_text(aodv_tree, tvb, offset,
 494                                  (INET6_ADDRLEN + 4)*dest_count,
 495                                  "Unreachable Destinations");
 496         aodv_unreach_dest_tree = proto_item_add_subtree(tj, ett_aodv_unreach_dest);
 497         for (i = 0; i < dest_count; i++) {
 498             proto_tree_add_item(aodv_unreach_dest_tree,
 499                                 hf_aodv_unreach_dest_ipv6,
 500                                 tvb, offset, INET6_ADDRLEN, FALSE);
 501             offset += INET6_ADDRLEN;
 502             proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
 503                                 tvb, offset, 4, FALSE);
 504             offset += 4;
 505         }
 506     } else {
 507         tj = proto_tree_add_text(aodv_tree, tvb, offset, (4 + 4)*dest_count,
 508                                  "Unreachable Destinations");
 509         aodv_unreach_dest_tree = proto_item_add_subtree(tj, ett_aodv_unreach_dest);
 510         for (i = 0; i < dest_count; i++) {
 511             proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_unreach_dest_ip,
 512                                 tvb, offset, 4, FALSE);
 513             offset += 4;
 514             proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
 515                                 tvb, offset, 4, FALSE);
 516             offset += 4;
 517         }
 518     }
 519 }
 520
 521 static void
 522 dissect_aodv_draft_01_v6_rreq(tvbuff_t *tvb, packet_info *pinfo,
 523                               proto_tree *aodv_tree, proto_item *ti)
 524 {
 525     int offset = 1;
 526     proto_item *tj;
 527     proto_tree *aodv_flags_tree;
 528     guint8 flags;
 529     guint8 hop_count;
 530     guint32 rreq_id;
 531     guint32 dest_seqno;
 532     guint32 orig_seqno;
 533     struct e_in6_addr dest_addr_v6;
 534     struct e_in6_addr orig_addr_v6;
 535     int extlen;
 536
 537     flags = tvb_get_guint8(tvb, offset);
 538     if (aodv_tree) {
 539         tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
 540         aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
 541         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_join,
 542                                tvb, offset, 1, flags);
 543         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_repair,
 544                                tvb, offset, 1, flags);
 545         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_gratuitous,
 546                                tvb, offset, 1, flags);
 547         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_destinationonly,
 548                                tvb, offset, 1, flags);
 549         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_unknown,
 550                                tvb, offset, 1, flags);
 551         if (flags & RREQ_JOIN)
 552             proto_item_append_text(tj, " J");
 553         if (flags & RREQ_REP)
 554             proto_item_append_text(tj, " R");
 555         if (flags & RREQ_GRATRREP)
 556             proto_item_append_text(tj, " G");
 557         if (flags & RREQ_DESTONLY)
 558             proto_item_append_text(tj, " D");
 559         if (flags & RREQ_UNKNSEQ)
 560             proto_item_append_text(tj, " U");
 561     }
 562     offset += 2;        /* skip reserved byte */
 563
 564     hop_count = tvb_get_guint8(tvb, offset);
 565     if (aodv_tree)
 566         proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
 567                              hop_count);
 568     offset += 1;
 569
 570     rreq_id = tvb_get_ntohl(tvb, offset);
 571     if (aodv_tree)
 572         proto_tree_add_uint(aodv_tree, hf_aodv_rreq_id, tvb, offset, 4,
 573                             rreq_id);
 574     offset += 4;
 575
 576     dest_seqno = tvb_get_ntohl(tvb, offset);
 577     if (aodv_tree)
 578         proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
 579                             dest_seqno);
 580     offset += 4;
 581
 582     orig_seqno = tvb_get_ntohl(tvb, offset);
 583     if (aodv_tree)
 584         proto_tree_add_uint(aodv_tree, hf_aodv_orig_seqno, tvb, offset, 4,
 585                             orig_seqno);
 586     offset += 4;
 587
 588     tvb_get_ipv6(tvb, offset, &dest_addr_v6);
 589     if (aodv_tree) {
 590         proto_tree_add_ipv6(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
 591                             INET6_ADDRLEN, (guint8 *)&dest_addr_v6);
 592         proto_item_append_text(ti, ", Dest IP: %s",
 593                                ip6_to_str(&dest_addr_v6));
 594     }
 595     if (check_col(pinfo->cinfo, COL_INFO))
 596         col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
 597                         ip6_to_str(&dest_addr_v6));
 598     offset += INET6_ADDRLEN;
 599
 600     tvb_get_ipv6(tvb, offset, &orig_addr_v6);
 601     if (aodv_tree) {
 602         proto_tree_add_ipv6(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
 603                             INET6_ADDRLEN, (guint8 *)&orig_addr_v6);
 604         proto_item_append_text(ti, ", Orig IP: %s",
 605                                ip6_to_str(&orig_addr_v6));
 606     }
 607     if (check_col(pinfo->cinfo, COL_INFO))
 608         col_append_fstr(pinfo->cinfo, COL_INFO,
 609                         ", O: %s Id=%u Hcnt=%u DSN=%u OSN=%u",
 610                         ip6_to_str(&orig_addr_v6),
 611                         rreq_id,
 612                         hop_count,
 613                         dest_seqno,
 614                         orig_seqno);
 615     offset += INET6_ADDRLEN;
 616
 617     if (aodv_tree) {
 618         extlen = tvb_reported_length_remaining(tvb, offset);
 619         if (extlen > 0)
 620             dissect_aodv_ext(tvb, offset, aodv_tree);
 621     }
 622 }
 623
 624 static void
 625 dissect_aodv_draft_01_v6_rrep(tvbuff_t *tvb, packet_info *pinfo,
 626                               proto_tree *aodv_tree, proto_item *ti)
 627 {
 628     int offset = 1;
 629     proto_item *tj;
 630     proto_tree *aodv_flags_tree;
 631     guint8 flags;
 632     guint8 prefix_sz;
 633     guint8 hop_count;
 634     guint32 dest_seqno;
 635     struct e_in6_addr dest_addr_v6;
 636     struct e_in6_addr orig_addr_v6;
 637     guint32 lifetime;
 638     int extlen;
 639
 640     flags = tvb_get_guint8(tvb, offset);
 641     if (aodv_tree) {
 642         tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
 643         aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
 644         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rrep_repair,
 645                                tvb, offset, 1, flags);
 646         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rrep_ack, tvb,
 647                                offset, 1, flags);
 648         if (flags & RREP_REP)
 649             proto_item_append_text(tj, " R");
 650         if (flags & RREP_ACK_REQ)
 651             proto_item_append_text(tj, " A");
 652     }
 653     offset += 1;
 654
 655     prefix_sz = tvb_get_guint8(tvb, offset) & 0x7F;
 656     if (aodv_tree)
 657         proto_tree_add_uint(aodv_tree, hf_aodv_prefix_sz, tvb, offset, 1,
 658                             prefix_sz);
 659     offset += 1;
 660
 661     hop_count = tvb_get_guint8(tvb, offset);
 662     if (aodv_tree)
 663         proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
 664                             hop_count);
 665     offset += 1;
 666
 667     dest_seqno = tvb_get_ntohl(tvb, offset);
 668     if (aodv_tree)
 669         proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
 670                             dest_seqno);
 671     offset += 4;
 672
 673     tvb_get_ipv6(tvb, offset, &dest_addr_v6);
 674     if (aodv_tree) {
 675         proto_tree_add_ipv6(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
 676                             INET6_ADDRLEN, (guint8 *)&dest_addr_v6);
 677         proto_item_append_text(ti, ", Dest IP: %s",
 678                                ip6_to_str(&dest_addr_v6));
 679     }
 680     if (check_col(pinfo->cinfo, COL_INFO))
 681         col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
 682                         ip6_to_str(&dest_addr_v6));
 683     offset += INET6_ADDRLEN;
 684
 685     tvb_get_ipv6(tvb, offset, &orig_addr_v6);
 686     if (aodv_tree) {
 687         proto_tree_add_ipv6(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
 688                             INET6_ADDRLEN, (guint8 *)&orig_addr_v6);
 689         proto_item_append_text(ti, ", Orig IP: %s",
 690                                ip6_to_str(&orig_addr_v6));
 691     }
 692     if (check_col(pinfo->cinfo, COL_INFO))
 693         col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
 694                         ip6_to_str(&orig_addr_v6));
 695     offset += INET6_ADDRLEN;
 696
 697     lifetime = tvb_get_ntohl(tvb, offset);
 698     if (aodv_tree) {
 699         proto_tree_add_uint(aodv_tree, hf_aodv_lifetime, tvb, offset, 4,
 700                             lifetime);
 701         proto_item_append_text(ti, ", Lifetime=%u", lifetime);
 702     }
 703     if (check_col(pinfo->cinfo, COL_INFO))
 704         col_append_fstr(pinfo->cinfo, COL_INFO, " Hcnt=%u DSN=%u Lifetime=%u",
 705                         hop_count,
 706                         dest_seqno,
 707                         lifetime);
 708     offset += 4;
 709
 710     if (aodv_tree) {
 711         extlen = tvb_reported_length_remaining(tvb, offset);
 712         if (extlen > 0)
 713             dissect_aodv_ext(tvb, offset, aodv_tree);
 714     }
 715 }
 716
 717 static void
 718 dissect_aodv_draft_01_v6_rerr(tvbuff_t *tvb, packet_info *pinfo,
 719                               proto_tree *aodv_tree)
 720 {
 721     int offset = 1;
 722     proto_item *tj;
 723     proto_tree *aodv_flags_tree;
 724     proto_tree *aodv_unreach_dest_tree;
 725     guint8 flags;
 726     guint8 dest_count;
 727     int i;
 728
 729     flags = tvb_get_guint8(tvb, offset);
 730     if (aodv_tree) {
 731         tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
 732         aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
 733         proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rerr_nodelete,
 734                                tvb, offset, 1, flags);
 735         if (flags & RERR_NODEL)
 736             proto_item_append_text(tj, " N");
 737     }
 738     offset += 2;        /* skip reserved byte */
 739
 740     dest_count = tvb_get_guint8(tvb, offset);
 741     if (aodv_tree)
 742         proto_tree_add_uint(aodv_tree, hf_aodv_destcount, tvb, offset, 1,
 743                             dest_count);
 744     if (check_col(pinfo->cinfo, COL_INFO))
 745         col_append_fstr(pinfo->cinfo, COL_INFO, ", Dest Count=%u",
 746                         dest_count);
 747     offset += 1;
 748
 749     tj = proto_tree_add_text(aodv_tree, tvb, offset,
 750                              (4 + INET6_ADDRLEN)*dest_count,
 751                              "Unreachable Destinations");
 752     aodv_unreach_dest_tree = proto_item_add_subtree(tj, ett_aodv_unreach_dest);
 753     for (i = 0; i < dest_count; i++) {
 754         proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
 755                             tvb, offset, 4, FALSE);
 756         offset += 4;
 757         proto_tree_add_item(aodv_unreach_dest_tree,
 758                             hf_aodv_unreach_dest_ipv6,
 759                             tvb, offset, INET6_ADDRLEN, FALSE);
 760         offset += INET6_ADDRLEN;
 761     }
 762 }
 763
 764 static int
 765 dissect_aodv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 766 {
 767     proto_item *ti = NULL;
 768     proto_tree *aodv_tree = NULL;
 769     gboolean is_ipv6;
 770     guint8 type;
 771
 772 /* Make entries in Protocol column and Info column on summary display */
 773     col_set_str(pinfo->cinfo, COL_PROTOCOL, "AODV");
 774
 775     if (check_col(pinfo->cinfo, COL_INFO))
 776         col_clear(pinfo->cinfo, COL_INFO);
 777
 778     /* Is this running over IPv6? */
 779     is_ipv6 = (pinfo->src.type == AT_IPv6);
 780
 781     /* Check the type of AODV packet. */
 782     type = tvb_get_guint8(tvb, 0);
 783     if (match_strval(type, type_vals) == NULL) {
 784         /*
 785          * We assume this is not an AODV packet.
 786          */
 787         return 0;
 788     }
 789
 790     if (check_col(pinfo->cinfo, COL_INFO))
 791         col_add_str(pinfo->cinfo, COL_INFO,
 792                      val_to_str(type, type_vals,
 793                                 "Unknown AODV Packet Type (%u)"));
 794     if (tree) {
 795         ti = proto_tree_add_protocol_format(tree, proto_aodv, tvb, 0, -1,
 796             "Ad hoc On-demand Distance Vector Routing Protocol, %s",
 797             val_to_str(type, type_vals, "Unknown AODV Packet Type (%u)"));
 798         aodv_tree = proto_item_add_subtree(ti, ett_aodv);
 799
 800         proto_tree_add_uint(aodv_tree, hf_aodv_type, tvb, 0, 1, type);
 801     }
 802
 803     switch (type) {
 804     case RREQ:
 805         dissect_aodv_rreq(tvb, pinfo, aodv_tree, ti, is_ipv6);
 806         break;
 807     case RREP:
 808         dissect_aodv_rrep(tvb, pinfo, aodv_tree, ti, is_ipv6);
 809         break;
 810     case RERR:
 811         dissect_aodv_rerr(tvb, pinfo, aodv_tree, is_ipv6);
 812         break;
 813     case RREP_ACK:
 814         break;
 815     case DRAFT_01_V6_RREQ:
 816         dissect_aodv_draft_01_v6_rreq(tvb, pinfo, aodv_tree, ti);
 817         break;
 818     case DRAFT_01_V6_RREP:
 819         dissect_aodv_draft_01_v6_rrep(tvb, pinfo, aodv_tree, ti);
 820         break;
 821     case DRAFT_01_V6_RERR:
 822         dissect_aodv_draft_01_v6_rerr(tvb, pinfo, aodv_tree);
 823         break;
 824     case DRAFT_01_V6_RREP_ACK:
 825         break;
 826     default:
 827         proto_tree_add_text(aodv_tree, tvb, 0, -1,
 828                             "Unknown AODV Packet Type (%u)", type);
 829     }
 830
 831     return tvb_length(tvb);
 832 }
 833
 834
 835 /* Register the protocol with Wireshark */
 836 void
 837 proto_register_aodv(void)
 838 {
 839     static hf_register_info hf[] = {
 840         { &hf_aodv_type,
 841           { "Type", "aodv.type",
 842             FT_UINT8, BASE_DEC, VALS(type_vals), 0x0,
 843             "AODV packet type", HFILL }
 844         },
 845         { &hf_aodv_flags,
 846           { "Flags", "aodv.flags",
 847             FT_UINT16, BASE_DEC, NULL, 0x0,
 848             NULL, HFILL }
 849         },
 850         { &hf_aodv_flags_rreq_join,
 851           { "RREQ Join", "aodv.flags.rreq_join",
 852             FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_JOIN,
 853             NULL, HFILL }
 854         },
 855         { &hf_aodv_flags_rreq_repair,
 856           { "RREQ Repair", "aodv.flags.rreq_repair",
 857             FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_REP,
 858             NULL, HFILL }
 859         },
 860         { &hf_aodv_flags_rreq_gratuitous,
 861           { "RREQ Gratuitous RREP", "aodv.flags.rreq_gratuitous",
 862             FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_GRATRREP,
 863             NULL, HFILL }
 864         },
 865         { &hf_aodv_flags_rreq_destinationonly,
 866           { "RREQ Destination only", "aodv.flags.rreq_destinationonly",
 867             FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_DESTONLY,
 868             NULL, HFILL }
 869         },
 870         { &hf_aodv_flags_rreq_unknown,
 871           { "RREQ Unknown Sequence Number", "aodv.flags.rreq_unknown",
 872             FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_UNKNSEQ,
 873             NULL, HFILL }
 874         },
 875         { &hf_aodv_flags_rrep_repair,
 876           { "RREP Repair", "aodv.flags.rrep_repair",
 877             FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREP_REP,
 878             NULL, HFILL }
 879         },
 880         { &hf_aodv_flags_rrep_ack,
 881           { "RREP Acknowledgement", "aodv.flags.rrep_ack",
 882             FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREP_ACK_REQ,
 883             NULL, HFILL }
 884         },
 885         { &hf_aodv_flags_rerr_nodelete,
 886           { "RERR No Delete", "aodv.flags.rerr_nodelete",
 887             FT_BOOLEAN, 8, TFS(&tfs_set_notset), RERR_NODEL,
 888             NULL, HFILL }
 889         },
 890         { &hf_aodv_prefix_sz,
 891           { "Prefix Size", "aodv.prefix_sz",
 892             FT_UINT8, BASE_DEC, NULL, 0x0,
 893             NULL, HFILL }
 894         },
 895         { &hf_aodv_hopcount,
 896           { "Hop Count", "aodv.hopcount",
 897             FT_UINT8, BASE_DEC, NULL, 0x0,
 898             NULL, HFILL }
 899         },
 900         { &hf_aodv_rreq_id,
 901           { "RREQ Id", "aodv.rreq_id",
 902             FT_UINT32, BASE_DEC, NULL, 0x0,
 903             NULL, HFILL }
 904         },
 905         { &hf_aodv_dest_ip,
 906           { "Destination IP", "aodv.dest_ip",
 907             FT_IPv4, BASE_NONE, NULL, 0x0,
 908             "Destination IP Address", HFILL }
 909         },
 910         { &hf_aodv_dest_ipv6,
 911           { "Destination IPv6", "aodv.dest_ipv6",
 912             FT_IPv6, BASE_NONE, NULL, 0x0,
 913             "Destination IPv6 Address", HFILL}
 914         },
 915         { &hf_aodv_dest_seqno,
 916           { "Destination Sequence Number", "aodv.dest_seqno",
 917             FT_UINT32, BASE_DEC, NULL, 0x0,
 918             NULL, HFILL }
 919         },
 920         { &hf_aodv_orig_ip,
 921           { "Originator IP", "aodv.orig_ip",
 922             FT_IPv4, BASE_NONE, NULL, 0x0,
 923             "Originator IP Address", HFILL }
 924         },
 925         { &hf_aodv_orig_ipv6,
 926           { "Originator IPv6", "aodv.orig_ipv6",
 927             FT_IPv6, BASE_NONE, NULL, 0x0,
 928             "Originator IPv6 Address", HFILL}
 929         },
 930         { &hf_aodv_orig_seqno,
 931           { "Originator Sequence Number", "aodv.orig_seqno",
 932             FT_UINT32, BASE_DEC, NULL, 0x0,
 933             NULL, HFILL }
 934         },
 935         { &hf_aodv_lifetime,
 936           { "Lifetime", "aodv.lifetime",
 937             FT_UINT32, BASE_DEC, NULL, 0x0,
 938             NULL, HFILL }
 939         },
 940         { &hf_aodv_destcount,
 941           { "Destination Count", "aodv.destcount",
 942             FT_UINT8, BASE_DEC, NULL, 0x0,
 943             "Unreachable Destinations Count", HFILL }
 944         },
 945         { &hf_aodv_unreach_dest_ip,
 946           { "Unreachable Destination IP", "aodv.unreach_dest_ip",
 947             FT_IPv4, BASE_NONE, NULL, 0x0,
 948             "Unreachable Destination IP Address", HFILL }
 949         },
 950         { &hf_aodv_unreach_dest_ipv6,
 951           { "Unreachable Destination IPv6", "aodv.unreach_dest_ipv6",
 952             FT_IPv6, BASE_NONE, NULL, 0x0,
 953             "Unreachable Destination IPv6 Address", HFILL}
 954         },
 955         { &hf_aodv_unreach_dest_seqno,
 956           { "Unreachable Destination Sequence Number", "aodv.unreach_dest_seqno",
 957             FT_UINT32, BASE_DEC, NULL, 0x0,
 958             NULL, HFILL }
 959         },
 960         { &hf_aodv_ext_type,
 961           { "Extension Type", "aodv.ext_type",
 962             FT_UINT8, BASE_DEC, NULL, 0x0,
 963             "Extension Format Type", HFILL}
 964         },
 965         { &hf_aodv_ext_length,
 966           { "Extension Length", "aodv.ext_length",
 967             FT_UINT8, BASE_DEC, NULL, 0x0,
 968             "Extension Data Length", HFILL}
 969         },
 970         { &hf_aodv_ext_interval,
 971           { "Hello Interval", "aodv.hello_interval",
 972             FT_UINT32, BASE_DEC, NULL, 0x0,
 973             "Hello Interval Extension", HFILL}
 974          },
 975         { &hf_aodv_ext_timestamp,
 976           { "Timestamp", "aodv.timestamp",
 977             FT_UINT64, BASE_DEC, NULL, 0x0,
 978             "Timestamp Extension", HFILL}
 979          },
 980     };
 981
 982 /* Setup protocol subtree array */
 983     static gint *ett[] = {
 984         &ett_aodv,
 985         &ett_aodv_flags,
 986         &ett_aodv_unreach_dest,
 987         &ett_aodv_extensions,
 988     };
 989
 990 /* Register the protocol name and description */
 991     proto_aodv = proto_register_protocol("Ad hoc On-demand Distance Vector Routing Protocol", "AODV", "aodv");
 992
 993 /* Required function calls to register the header fields and subtrees used */
 994     proto_register_field_array(proto_aodv, hf, array_length(hf));
 995     proto_register_subtree_array(ett, array_length(ett));
 996 }
 997
 998
 999 void
1000 proto_reg_handoff_aodv(void)
1001 {
1002     dissector_handle_t aodv_handle;
1003
1004     aodv_handle = new_create_dissector_handle(dissect_aodv,
1005                                               proto_aodv);
1006     dissector_add("udp.port", UDP_PORT_AODV, aodv_handle);
1007 }