contrib/tcpdump/print-rt6.c

   1 /*
   2  * Copyright (c) 1988, 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[] _U_ =
  24     "@(#) $Header: /tcpdump/master/tcpdump/print-rt6.c,v 1.27 2005-04-20 22:34:57 guy 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 #include <stdio.h>
  36
  37 #include "ip6.h"
  38
  39 #include "interface.h"
  40 #include "addrtoname.h"
  41 #include "extract.h"
  42
  43 int
  44 rt6_print(register const u_char *bp, const u_char *bp2 _U_)
  45 {
  46         register const struct ip6_rthdr *dp;
  47         register const struct ip6_rthdr0 *dp0;
  48         register const u_char *ep;
  49         int i, len;
  50         register const struct in6_addr *addr;
  51
  52         dp = (struct ip6_rthdr *)bp;
  53         len = dp->ip6r_len;
  54
  55         /* 'ep' points to the end of available data. */
  56         ep = snapend;
  57
  58         TCHECK(dp->ip6r_segleft);
  59
  60         printf("srcrt (len=%d", dp->ip6r_len);  /*)*/
  61         printf(", type=%d", dp->ip6r_type);
  62         printf(", segleft=%d", dp->ip6r_segleft);
  63
  64         switch (dp->ip6r_type) {
  65 #ifndef IPV6_RTHDR_TYPE_0
  66 #define IPV6_RTHDR_TYPE_0 0
  67 #endif
  68 #ifndef IPV6_RTHDR_TYPE_2
  69 #define IPV6_RTHDR_TYPE_2 2
  70 #endif
  71         case IPV6_RTHDR_TYPE_0:
  72         case IPV6_RTHDR_TYPE_2:                 /* Mobile IPv6 ID-20 */
  73                 dp0 = (struct ip6_rthdr0 *)dp;
  74
  75                 TCHECK(dp0->ip6r0_reserved);
  76                 if (dp0->ip6r0_reserved || vflag) {
  77                         printf(", rsv=0x%0x",
  78                             EXTRACT_32BITS(&dp0->ip6r0_reserved));
  79                 }
  80
  81                 if (len % 2 == 1)
  82                         goto trunc;
  83                 len >>= 1;
  84                 addr = &dp0->ip6r0_addr[0];
  85                 for (i = 0; i < len; i++) {
  86                         if ((u_char *)(addr + 1) > ep)
  87                                 goto trunc;
  88
  89                         printf(", [%d]%s", i, ip6addr_string(addr));
  90                         addr++;
  91                 }
  92                 /*(*/
  93                 printf(") ");
  94                 return((dp0->ip6r0_len + 1) << 3);
  95                 break;
  96         default:
  97                 goto trunc;
  98                 break;
  99         }
 100
 101  trunc:
 102         fputs("[|srcrt]", stdout);
 103         return -1;
 104 }
 105 #endif /* INET6 */