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 1.6 2000-09-29 04:58:47 guy Exp $";
  25 #endif
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #ifdef INET6
  32
  33 #include <sys/param.h>
  34 #include <sys/time.h>
  35 #include <sys/types.h>
  36 #include <sys/socket.h>
  37
  38 #include <netinet/in.h>
  39
  40 #include <errno.h>
  41 #include <stdio.h>
  42
  43 #include <netinet/ip6.h>
  44
  45 #include "route6d.h"
  46 #include "interface.h"
  47 #include "addrtoname.h"
  48
  49 static int
  50 rip6_entry_print(register const struct netinfo6 *ni, int metric)
  51 {
  52         int l;
  53         l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen);
  54         if (ni->rip6_tag)
  55                 l += printf(" [%d]", ntohs(ni->rip6_tag));
  56         if (metric)
  57                 l += printf(" (%d)", ni->rip6_metric);
  58         return l;
  59 }
  60
  61 void
  62 ripng_print(const u_char *dat, int length)
  63 {
  64         register const struct rip6 *rp = (struct rip6 *)dat;
  65         register const struct netinfo6 *ni;
  66         register int amt = snapend - dat;
  67         register int i = min(length, amt) -
  68                          (sizeof(struct rip6) - sizeof(struct netinfo6));
  69         int j;
  70         int trunc;
  71
  72         if (i < 0)
  73                 return;
  74
  75         switch (rp->rip6_cmd) {
  76
  77         case RIP6_REQUEST:
  78                 j = length / sizeof(*ni);
  79                 if (j == 1
  80                     &&  rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
  81                     &&  IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
  82                         printf(" ripng-req dump");
  83                         break;
  84                 }
  85                 if (j * sizeof(*ni) != length - 4)
  86                         printf(" ripng-req %d[%d]:", j, length);
  87                 else
  88                         printf(" ripng-req %d:", j);
  89                 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
  90                 for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
  91                         if (vflag)
  92                                 printf("\n\t");
  93                         else
  94                                 printf(" ");
  95                         rip6_entry_print(ni, 0);
  96                 }
  97                 break;
  98         case RIP6_RESPONSE:
  99                 j = length / sizeof(*ni);
 100                 if (j * sizeof(*ni) != length - 4)
 101                         printf(" ripng-resp %d[%d]:", j, length);
 102                 else
 103                         printf(" ripng-resp %d:", j);
 104                 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
 105                 for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
 106                         if (vflag)
 107                                 printf("\n\t");
 108                         else
 109                                 printf(" ");
 110                         rip6_entry_print(ni, ni->rip6_metric);
 111                 }
 112                 if (trunc)
 113                         printf("[|rip]");
 114                 break;
 115         default:
 116                 printf(" ripng-%d ?? %d", rp->rip6_cmd, length);
 117                 break;
 118         }
 119         if (rp->rip6_vers != RIP6_VERSION)
 120                 printf(" [vers %d]", rp->rip6_vers);
 121 }
 122 #endif /* INET6 */