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     "@(#) /master/usr.sbin/tcpdump/tcpdump/print-rip.c,v 2.1 1995/02/03 18:15:05 polk Exp (LBL)";
  25 #endif
  26
  27 #ifdef INET6
  28
  29 #include <sys/param.h>
  30 #include <sys/time.h>
  31 #include <sys/types.h>
  32 #include <sys/socket.h>
  33
  34 #include <netinet/in.h>
  35 #include <netinet/in_systm.h>
  36 #include <netinet/ip.h>
  37 #include <netinet/ip_var.h>
  38 #include <netinet/udp.h>
  39 #include <netinet/udp_var.h>
  40
  41 #include <errno.h>
  42 #include <stdio.h>
  43
  44 #include <netinet/ip6.h>
  45
  46 #include "route6d.h"
  47 #include "interface.h"
  48 #include "addrtoname.h"
  49
  50 static int
  51 rip6_entry_print(register const struct netinfo6 *ni, int metric)
  52 {
  53         int l;
  54         l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen);
  55         if (ni->rip6_tag)
  56                 l += printf(" [%d]", ntohs(ni->rip6_tag));
  57         if (metric)
  58                 l += printf(" (%d)", ni->rip6_metric);
  59         return l;
  60 }
  61
  62 void
  63 ripng_print(const u_char *dat, int length)
  64 {
  65         register const struct rip6 *rp = (struct rip6 *)dat;
  66         register const struct netinfo6 *ni;
  67         register int amt = snapend - dat;
  68         register int i = min(length, amt) -
  69                          (sizeof(struct rip6) - sizeof(struct netinfo6));
  70         int j;
  71         int trunc;
  72
  73         if (i < 0)
  74                 return;
  75
  76         switch (rp->rip6_cmd) {
  77
  78         case RIP6_REQUEST:
  79                 j = length / sizeof(*ni);
  80                 if (j == 1
  81                     &&  rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
  82                     &&  IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
  83                         printf(" ripng-req dump");
  84                         break;
  85                 }
  86                 if (j * sizeof(*ni) != length - 4)
  87                         printf(" ripng-req %d[%d]:", j, length);
  88                 else
  89                         printf(" ripng-req %d:", j);
  90                 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
  91                 for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
  92                         if (vflag)
  93                                 printf("\n\t");
  94                         else
  95                                 printf(" ");
  96                         rip6_entry_print(ni, 0);
  97                 }
  98                 break;
  99         case RIP6_RESPONSE:
 100                 j = length / sizeof(*ni);
 101                 if (j * sizeof(*ni) != length - 4)
 102                         printf(" ripng-resp %d[%d]:", j, length);
 103                 else
 104                         printf(" ripng-resp %d:", j);
 105                 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
 106                 for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
 107                         if (vflag)
 108                                 printf("\n\t");
 109                         else
 110                                 printf(" ");
 111                         rip6_entry_print(ni, ni->rip6_metric);
 112                 }
 113                 if (trunc)
 114                         printf("[|rip]");
 115                 break;
 116         default:
 117                 printf(" ripng-%d ?? %d", rp->rip6_cmd, length);
 118                 break;
 119         }
 120         if (rp->rip6_vers != RIP6_VERSION)
 121                 printf(" [vers %d]", rp->rip6_vers);
 122 }
 123 #endif /* INET6 */