The Tcpdump Group git mirrors - tcpdump/blob - 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 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #ifdef INET6
  27
  28 #include <tcpdump-stdinc.h>
  29
  30 #include <stdio.h>
  31
  32 #include "ip6.h"
  33
  34 #include "interface.h"
  35 #include "addrtoname.h"
  36 #include "extract.h"
  37
  38 int
  39 rt6_print(register const u_char *bp, const u_char *bp2 _U_)
  40 {
  41         register const struct ip6_rthdr *dp;
  42         register const struct ip6_rthdr0 *dp0;
  43         register const u_char *ep;
  44         int i, len;
  45         register const struct in6_addr *addr;
  46
  47         dp = (struct ip6_rthdr *)bp;
  48         len = dp->ip6r_len;
  49
  50         /* 'ep' points to the end of available data. */
  51         ep = snapend;
  52
  53         TCHECK(dp->ip6r_segleft);
  54
  55         printf("srcrt (len=%d", dp->ip6r_len);  /*)*/
  56         printf(", type=%d", dp->ip6r_type);
  57         printf(", segleft=%d", dp->ip6r_segleft);
  58
  59         switch (dp->ip6r_type) {
  60 #ifndef IPV6_RTHDR_TYPE_0
  61 #define IPV6_RTHDR_TYPE_0 0
  62 #endif
  63 #ifndef IPV6_RTHDR_TYPE_2
  64 #define IPV6_RTHDR_TYPE_2 2
  65 #endif
  66         case IPV6_RTHDR_TYPE_0:
  67         case IPV6_RTHDR_TYPE_2:                 /* Mobile IPv6 ID-20 */
  68                 dp0 = (struct ip6_rthdr0 *)dp;
  69
  70                 TCHECK(dp0->ip6r0_reserved);
  71                 if (dp0->ip6r0_reserved || vflag) {
  72                         printf(", rsv=0x%0x",
  73                             EXTRACT_32BITS(&dp0->ip6r0_reserved));
  74                 }
  75
  76                 if (len % 2 == 1)
  77                         goto trunc;
  78                 len >>= 1;
  79                 addr = &dp0->ip6r0_addr[0];
  80                 for (i = 0; i < len; i++) {
  81                         if ((u_char *)(addr + 1) > ep)
  82                                 goto trunc;
  83
  84                         printf(", [%d]%s", i, ip6addr_string(addr));
  85                         addr++;
  86                 }
  87                 /*(*/
  88                 printf(") ");
  89                 return((dp0->ip6r0_len + 1) << 3);
  90                 break;
  91         default:
  92                 goto trunc;
  93                 break;
  94         }
  95
  96  trunc:
  97         fputs("[|srcrt]", stdout);
  98         return -1;
  99 }
 100 #endif /* INET6 */