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

   1 /*
   2  * Copyright (c) 1989, 1990, 1991, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21
  22 #ifndef lint
  23 static const char rcsid[] =
  24     "@(#) $Header: /tcpdump/master/tcpdump/print-ripng.c,v 1.11 2002-08-01 08:53:26 risso Exp $";
  25 #endif
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #ifdef INET6
  32
  33 #include <tcpdump-stdinc.h>
  34
  35 #ifdef __MINGW32__
  36 int
  37 IN6_ADDR_EQUAL(const struct in6_addr *a, const struct in6_addr *b)
  38 {
  39     return (memcmp(a, b, sizeof(struct in6_addr)) == 0);
  40 }
  41
  42 #define IN6_IS_ADDR_UNSPECIFIED(a) IN6_ADDR_EQUAL((a), &in6addr_any)
  43 #endif /* __MINGW32__ */
  44
  45 #include <errno.h>
  46 #include <stdio.h>
  47
  48 #include "route6d.h"
  49 #include "interface.h"
  50 #include "addrtoname.h"
  51
  52 static int
  53 rip6_entry_print(register const struct netinfo6 *ni, int metric)
  54 {
  55         int l;
  56         l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen);
  57         if (ni->rip6_tag)
  58                 l += printf(" [%d]", ntohs(ni->rip6_tag));
  59         if (metric)
  60                 l += printf(" (%d)", ni->rip6_metric);
  61         return l;
  62 }
  63
  64 void
  65 ripng_print(const u_char *dat, unsigned int length)
  66 {
  67         register const struct rip6 *rp = (struct rip6 *)dat;
  68         register const struct netinfo6 *ni;
  69         register int amt = snapend - dat;
  70         register int i = min(length, amt) -
  71                          (sizeof(struct rip6) - sizeof(struct netinfo6));
  72         int j;
  73         int trunc;
  74
  75         if (i < 0)
  76                 return;
  77
  78         switch (rp->rip6_cmd) {
  79
  80         case RIP6_REQUEST:
  81                 j = length / sizeof(*ni);
  82                 if (j == 1
  83                     &&  rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
  84                     &&  IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
  85                         printf(" ripng-req dump");
  86                         break;
  87                 }
  88                 if (j * sizeof(*ni) != length - 4)
  89                         printf(" ripng-req %d[%u]:", j, length);
  90                 else
  91                         printf(" ripng-req %d:", j);
  92                 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
  93                 for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
  94                         if (vflag > 1)
  95                                 printf("\n\t");
  96                         else
  97                                 printf(" ");
  98                         rip6_entry_print(ni, 0);
  99                 }
 100                 break;
 101         case RIP6_RESPONSE:
 102                 j = length / sizeof(*ni);
 103                 if (j * sizeof(*ni) != length - 4)
 104                         printf(" ripng-resp %d[%u]:", j, length);
 105                 else
 106                         printf(" ripng-resp %d:", j);
 107                 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
 108                 for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
 109                         if (vflag > 1)
 110                                 printf("\n\t");
 111                         else
 112                                 printf(" ");
 113                         rip6_entry_print(ni, ni->rip6_metric);
 114                 }
 115                 if (trunc)
 116                         printf("[|ripng]");
 117                 break;
 118         default:
 119                 printf(" ripng-%d ?? %u", rp->rip6_cmd, length);
 120                 break;
 121         }
 122         if (rp->rip6_vers != RIP6_VERSION)
 123                 printf(" [vers %d]", rp->rip6_vers);
 124 }
 125 #endif /* INET6 */