dist/tcpdump/print-ripng.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1989, 1990, 1991, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23
  24 #include <sys/cdefs.h>
  25 #ifndef lint
  26 #if 0
  27 static const char rcsid[] _U_ =
  28     "@(#) Header: /tcpdump/master/tcpdump/print-ripng.c,v 1.18 2005/01/04 00:15:54 guy Exp";
  29 #else
  30 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  31 #endif
  32 #endif
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include "config.h"
  36 #endif
  37
  38 #ifdef INET6
  39
  40 #include <tcpdump-stdinc.h>
  41 #include <stdio.h>
  42
  43 #include "route6d.h"
  44 #include "interface.h"
  45 #include "addrtoname.h"
  46 #include "extract.h"
  47
  48 #if !defined(IN6_IS_ADDR_UNSPECIFIED) && !defined(_MSC_VER) /* MSVC inline */
  49 static int IN6_IS_ADDR_UNSPECIFIED(const struct in6_addr *addr)
  50 {
  51     static const struct in6_addr in6addr_any;        /* :: */
  52     return (memcmp(addr, &in6addr_any, sizeof(*addr)) == 0);
  53 }
  54 #endif
  55
  56 static int
  57 rip6_entry_print(register const struct netinfo6 *ni, int metric)
  58 {
  59         int l;
  60         l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen);
  61         if (ni->rip6_tag)
  62                 l += printf(" [%d]", EXTRACT_16BITS(&ni->rip6_tag));
  63         if (metric)
  64                 l += printf(" (%d)", ni->rip6_metric);
  65         return l;
  66 }
  67
  68 void
  69 ripng_print(const u_char *dat, unsigned int length)
  70 {
  71         register const struct rip6 *rp = (struct rip6 *)dat;
  72         register const struct netinfo6 *ni;
  73         register u_int amt;
  74         register u_int i;
  75         int j;
  76         int trunc;
  77
  78         if (snapend < dat)
  79                 return;
  80         amt = snapend - dat;
  81         i = min(length, amt);
  82         if (i < (sizeof(struct rip6) - sizeof(struct netinfo6)))
  83                 return;
  84         i -= (sizeof(struct rip6) - sizeof(struct netinfo6));
  85
  86         switch (rp->rip6_cmd) {
  87
  88         case RIP6_REQUEST:
  89                 j = length / sizeof(*ni);
  90                 if (j == 1
  91                     &&  rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
  92                     &&  IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
  93                         printf(" ripng-req dump");
  94                         break;
  95                 }
  96                 if (j * sizeof(*ni) != length - 4)
  97                         printf(" ripng-req %d[%u]:", j, length);
  98                 else
  99                         printf(" ripng-req %d:", j);
 100                 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
 101                 for (ni = rp->rip6_nets; i >= sizeof(*ni);
 102                     i -= sizeof(*ni), ++ni) {
 103                         if (vflag > 1)
 104                                 printf("\n\t");
 105                         else
 106                                 printf(" ");
 107                         rip6_entry_print(ni, 0);
 108                 }
 109                 break;
 110         case RIP6_RESPONSE:
 111                 j = length / sizeof(*ni);
 112                 if (j * sizeof(*ni) != length - 4)
 113                         printf(" ripng-resp %d[%u]:", j, length);
 114                 else
 115                         printf(" ripng-resp %d:", j);
 116                 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
 117                 for (ni = rp->rip6_nets; i >= sizeof(*ni);
 118                     i -= sizeof(*ni), ++ni) {
 119                         if (vflag > 1)
 120                                 printf("\n\t");
 121                         else
 122                                 printf(" ");
 123                         rip6_entry_print(ni, ni->rip6_metric);
 124                 }
 125                 if (trunc)
 126                         printf("[|ripng]");
 127                 break;
 128         default:
 129                 printf(" ripng-%d ?? %u", rp->rip6_cmd, length);
 130                 break;
 131         }
 132         if (rp->rip6_vers != RIP6_VERSION)
 133                 printf(" [vers %d]", rp->rip6_vers);
 134 }
 135 #endif /* INET6 */