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[] =
  35     "@(#) $Header: /tcpdump/master/tcpdump/print-aodv.c,v 1.3 2003-08-13 02:23:07 itojun 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(struct aodv_ext *ep, u_int length)
  57 {
  58         u_int i;
  59         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 %d ms",
  75                         EXTRACT_32BITS(ah->interval));
  76                 break;
  77
  78         default:
  79                 printf("\n\text %d %d", ep->type, ep->length);
  80                 break;
  81         }
  82 }
  83
  84 static void
  85 aodv_rreq(union aodv *ap, const u_char *dat, u_int length, void *ip6
  86 #ifndef INET6
  87         _U_
  88 #endif
  89         )
  90 {
  91         u_int i;
  92
  93         if (snapend < dat) {
  94                 printf(" [|aodv]");
  95                 return;
  96         }
  97         i = min(length, (u_int)(snapend - dat));
  98         if (i < sizeof(ap->rreq)) {
  99                 printf(" [|rreq]");
 100                 return;
 101         }
 102         i -= sizeof(ap->rreq);
 103 #ifdef INET6
 104         if (ip6 != NULL) {
 105                 printf(" rreq %d %s%s%s%s%shops %d id 0x%08lx\n"
 106                         "\tdst %s seq %ld src %s seq %ld", length,
 107                         ap->rreq6.rreq_type & RREQ_JOIN ? "[J]" : "",
 108                         ap->rreq6.rreq_type & RREQ_REPAIR ? "[R]" : "",
 109                         ap->rreq6.rreq_type & RREQ_GRAT ? "[G]" : "",
 110                         ap->rreq6.rreq_type & RREQ_DEST ? "[D]" : "",
 111                         ap->rreq6.rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
 112                         ap->rreq6.rreq_hops,
 113                         (unsigned long)EXTRACT_32BITS(ap->rreq6.rreq_id),
 114                         ip6addr_string(&ap->rreq6.rreq_da),
 115                         (unsigned long)EXTRACT_32BITS(ap->rreq6.rreq_ds),
 116                         ip6addr_string(&ap->rreq6.rreq_oa),
 117                         (unsigned long)EXTRACT_32BITS(ap->rreq6.rreq_os));
 118                 if (i >= sizeof(ap->rreq6) + sizeof(struct aodv_ext)) {
 119                         aodv_extension((void *) (&ap->rreq6 + 1),
 120                                         length - sizeof(ap->rreq6));
 121                 }
 122                 } else
 123 #endif
 124         {
 125                 printf(" rreq %d %s%s%s%s%shops %d id 0x%08x\n"
 126                         "\tdst %s seq %d src %s seq %d", length,
 127                         ap->rreq.rreq_type & RREQ_JOIN ? "[J]" : "",
 128                         ap->rreq.rreq_type & RREQ_REPAIR ? "[R]" : "",
 129                         ap->rreq.rreq_type & RREQ_GRAT ? "[G]" : "",
 130                         ap->rreq.rreq_type & RREQ_DEST ? "[D]" : "",
 131                         ap->rreq.rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
 132                         ap->rreq.rreq_hops,
 133                         EXTRACT_32BITS(ap->rreq.rreq_id),
 134                         ipaddr_string(ap->rreq.rreq_da),
 135                         EXTRACT_32BITS(ap->rreq.rreq_ds),
 136                         ipaddr_string(ap->rreq.rreq_oa),
 137                         EXTRACT_32BITS(ap->rreq.rreq_os));
 138                 if (i >= sizeof(ap->rreq) + sizeof(struct aodv_ext)) {
 139                         aodv_extension((void *) (&ap->rreq + 1),
 140                                         length - sizeof(ap->rreq));
 141                 }
 142         }
 143 }
 144
 145 static void
 146 aodv_rrep(union aodv *ap, const u_char *dat, u_int length, void *ip6
 147 #ifndef INET6
 148         _U_
 149 #endif
 150         )
 151 {
 152         u_int i;
 153
 154         if (snapend < dat) {
 155                 printf(" [|aodv]");
 156                 return;
 157         }
 158         i = min(length, (u_int)(snapend - dat));
 159         if (i < sizeof(ap->rrep)) {
 160                 printf(" [|rrep]");
 161                 return;
 162         }
 163         i -= sizeof(ap->rrep);
 164 #ifdef INET6
 165         if (ip6 != NULL) {
 166                 printf(" rrep %d %s%sprefix %d hops %d\n"
 167                        "\tdst %s dseq %d src %s %d ms", length,
 168                         ap->rrep6.rrep_type & RREP_REPAIR ? "[R]" : "",
 169                         ap->rrep6.rrep_type & RREP_ACK ? "[A] " : " ",
 170                         ap->rrep6.rrep_ps & RREP_PREFIX_MASK,
 171                         ap->rrep6.rrep_hops,
 172                         ip6addr_string(&ap->rrep6.rrep_da),
 173                         EXTRACT_32BITS(ap->rrep6.rrep_ds),
 174                         ip6addr_string(&ap->rrep6.rrep_oa),
 175                         EXTRACT_32BITS(ap->rrep6.rrep_life));
 176                 if (i >= sizeof(ap->rrep6) + sizeof(struct aodv_ext)) {
 177                         aodv_extension((void *) (&ap->rrep6 + 1),
 178                                         length - sizeof(ap->rrep6));
 179                 }
 180         } else
 181 #endif
 182         {
 183                 printf(" rrep %d %s%sprefix %d hops %d\n"
 184                        "\tdst %s dseq %d src %s %d ms", length,
 185                         ap->rrep.rrep_type & RREP_REPAIR ? "[R]" : "",
 186                         ap->rrep.rrep_type & RREP_ACK ? "[A] " : " ",
 187                         ap->rrep.rrep_ps & RREP_PREFIX_MASK,
 188                         ap->rrep.rrep_hops,
 189                         ipaddr_string(ap->rrep.rrep_da),
 190                         EXTRACT_32BITS(ap->rrep.rrep_ds),
 191                         ipaddr_string(ap->rrep.rrep_oa),
 192                         EXTRACT_32BITS(ap->rrep.rrep_life));
 193                 if (i >= sizeof(ap->rrep) + sizeof(struct aodv_ext)) {
 194                         aodv_extension((void *) (&ap->rrep + 1),
 195                                         length - sizeof(ap->rrep));
 196                 }
 197         }
 198 }
 199
 200 static void
 201 aodv_rerr(union aodv *ap, u_int length, void *ip6
 202 #ifndef INET6
 203         _U_
 204 #endif
 205         )
 206 {
 207         int i, j, n, trunc;
 208         struct rerr_unreach *dp;
 209 #ifdef INET6
 210         struct rerr_unreach6 *dp6;
 211 #endif
 212
 213         i = length - offsetof(struct aodv_rerr, r);
 214 #ifdef INET6
 215         if (ip6 != NULL) {
 216                 j = sizeof(ap->rerr.r.dest6[0]);
 217                 dp6 = &ap->rerr.r.dest6[0];
 218         } else
 219 #endif
 220         {
 221                 j = sizeof(ap->rerr.r.dest[0]);
 222                 dp = &ap->rerr.r.dest[0];
 223         }
 224         n = ap->rerr.rerr_dc * j;
 225         printf(" rerr %s [items %d] [%d]:",
 226                 ap->rerr.rerr_flags & RERR_NODELETE ? "[D]" : "",
 227                 ap->rerr.rerr_dc, length);
 228         trunc = n - (i/j);
 229 #ifdef INET6
 230         if (ip6 != NULL) {
 231                 for (; i -= j >= 0; ++dp6) {
 232                         printf(" {%s}(%d)", ip6addr_string(&dp6->u_da),
 233                                 EXTRACT_32BITS(dp6->u_ds));
 234                 }
 235         } else
 236 #endif
 237         {
 238                 for (; i -= j >= 0; ++dp) {
 239                         printf(" {%s}(%d)", ipaddr_string(dp->u_da),
 240                                 EXTRACT_32BITS(dp->u_ds));
 241                 }
 242         }
 243         if (trunc)
 244                 printf("[|rerr]");
 245 }
 246
 247 void
 248 aodv_print(const u_char *dat, u_int length, void *ip6)
 249 {
 250         union aodv *ap;
 251
 252         ap = (union aodv *)dat;
 253         if (snapend < dat) {
 254                 printf(" [|aodv]");
 255                 return;
 256         }
 257         if (min(length, (u_int)(snapend - dat)) < sizeof(ap->rrep_ack)) {
 258                 printf(" [|aodv]");
 259                 return;
 260         }
 261         printf(" aodv");
 262
 263         switch (ap->rerr.rerr_type) {
 264         case AODV_RREQ:
 265                 aodv_rreq(ap, dat, length, ip6);
 266                 break;
 267         case AODV_RREP:
 268                 aodv_rrep(ap, dat, length, ip6);
 269                 break;
 270         case AODV_RERR:
 271                 aodv_rerr(ap, length, ip6);
 272                 break;
 273         case AODV_RREP_ACK:
 274                 printf(" rrep-ack %d", ap->rrep_ack.ra_type);
 275                 break;
 276
 277         default:
 278                 printf(" %d %d", ap->rreq.rreq_type, length);
 279         }
 280 }