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 #ifndef lint
  23 static const char rcsid[] =
  24     "@(#) $Header: /tcpdump/master/tcpdump/print-rt6.c,v 1.16 2000-10-07 05:53:13 itojun 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
  39 #include <netinet/in.h>
  40
  41 #include <stdio.h>
  42
  43 #include "ip6.h"
  44
  45 #include "interface.h"
  46 #include "addrtoname.h"
  47
  48 int
  49 rt6_print(register const u_char *bp, register const u_char *bp2)
  50 {
  51         register const struct ip6_rthdr *dp;
  52         register const struct ip6_rthdr0 *dp0;
  53         register const struct ip6_hdr *ip;
  54         register const u_char *ep;
  55         int i, len;
  56
  57         dp = (struct ip6_rthdr *)bp;
  58         ip = (struct ip6_hdr *)bp2;
  59         len = dp->ip6r_len;
  60
  61         /* 'ep' points to the end of available data. */
  62         ep = snapend;
  63
  64 #if 0
  65         printf("%s > %s: ",
  66                ip6addr_string(&ip->ip6_src),
  67                ip6addr_string(&ip->ip6_dst));
  68 #endif
  69
  70         TCHECK(dp->ip6r_segleft);
  71
  72         printf("srcrt (len=%d", dp->ip6r_len);  /*)*/
  73         printf(", type=%d", dp->ip6r_type);
  74         printf(", segleft=%d", dp->ip6r_segleft);
  75
  76         switch (dp->ip6r_type) {
  77 #ifndef IPV6_RTHDR_TYPE_0
  78 #define IPV6_RTHDR_TYPE_0 0
  79 #endif
  80         case IPV6_RTHDR_TYPE_0:
  81                 dp0 = (struct ip6_rthdr0 *)dp;
  82
  83                 TCHECK(dp0->ip6r0_reserved);
  84                 if (dp0->ip6r0_reserved || vflag) {
  85                         printf(", rsv=0x%0x",
  86                             (u_int32_t)ntohl(dp0->ip6r0_reserved));
  87                 }
  88
  89                 if (len % 2 == 1)
  90                         goto trunc;
  91                 len >>= 1;
  92                 for (i = 0; i < len; i++) {
  93                         struct in6_addr *addr;
  94
  95                         addr = ((struct in6_addr *)(dp0 + 1)) + i;
  96                         if ((u_char *)addr > ep - sizeof(*addr))
  97                                 goto trunc;
  98
  99                         printf(", [%d]%s", i, ip6addr_string((u_char *)addr));
 100                 }
 101                 /*(*/
 102                 printf(") ");
 103                 return((dp0->ip6r0_len + 1) << 3);
 104                 break;
 105         default:
 106                 goto trunc;
 107                 break;
 108         }
 109
 110  trunc:
 111         fputs("[|srcrt]", stdout);
 112         return 65535;           /* XXX */
 113 }
 114 #endif /* INET6 */