dist/tcpdump/print-rt6.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1988, 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-rt6.c,v 1.26.2.1 2005/04/20 22:35:11 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
  42 #include <stdio.h>
  43
  44 #include "ip6.h"
  45
  46 #include "interface.h"
  47 #include "addrtoname.h"
  48 #include "extract.h"
  49
  50 int
  51 rt6_print(register const u_char *bp, const u_char *bp2 _U_)
  52 {
  53         register const struct ip6_rthdr *dp;
  54         register const struct ip6_rthdr0 *dp0;
  55         register const u_char *ep;
  56         int i, len;
  57         register const struct in6_addr *addr;
  58
  59         dp = (struct ip6_rthdr *)bp;
  60         len = dp->ip6r_len;
  61
  62         /* 'ep' points to the end of available data. */
  63         ep = snapend;
  64
  65         TCHECK(dp->ip6r_segleft);
  66
  67         printf("srcrt (len=%d", dp->ip6r_len);  /*)*/
  68         printf(", type=%d", dp->ip6r_type);
  69         printf(", segleft=%d", dp->ip6r_segleft);
  70
  71         switch (dp->ip6r_type) {
  72 #ifndef IPV6_RTHDR_TYPE_0
  73 #define IPV6_RTHDR_TYPE_0 0
  74 #endif
  75 #ifndef IPV6_RTHDR_TYPE_2
  76 #define IPV6_RTHDR_TYPE_2 2
  77 #endif
  78         case IPV6_RTHDR_TYPE_0:
  79         case IPV6_RTHDR_TYPE_2:                 /* Mobile IPv6 ID-20 */
  80                 dp0 = (struct ip6_rthdr0 *)dp;
  81
  82                 TCHECK(dp0->ip6r0_reserved);
  83                 if (dp0->ip6r0_reserved || vflag) {
  84                         printf(", rsv=0x%0x",
  85                             EXTRACT_32BITS(&dp0->ip6r0_reserved));
  86                 }
  87
  88                 if (len % 2 == 1)
  89                         goto trunc;
  90                 len >>= 1;
  91                 addr = &dp0->ip6r0_addr[0];
  92                 for (i = 0; i < len; i++) {
  93                         if ((u_char *)(addr + 1) > ep)
  94                                 goto trunc;
  95
  96                         printf(", [%d]%s", i, ip6addr_string(addr));
  97                         addr++;
  98                 }
  99                 /*(*/
 100                 printf(") ");
 101                 return((dp0->ip6r0_len + 1) << 3);
 102                 break;
 103         default:
 104                 goto trunc;
 105                 break;
 106         }
 107
 108  trunc:
 109         fputs("[|srcrt]", stdout);
 110         return -1;
 111 }
 112 #endif /* INET6 */