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 1.6 2000-04-24 12:57:25 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 #include <net/if.h>
  39
  40 #include <netinet/in.h>
  41 #include <netinet/if_ether.h>
  42 #include <netinet/in_systm.h>
  43 #include <netinet/ip.h>
  44 #include <netinet/ip_icmp.h>
  45 #include <netinet/ip_var.h>
  46 #include <netinet/udp.h>
  47 #include <netinet/udp_var.h>
  48 #include <netinet/tcp.h>
  49
  50 #include <stdio.h>
  51
  52 #include <netinet/ip6.h>
  53
  54 #include "interface.h"
  55 #include "addrtoname.h"
  56
  57 int
  58 rt6_print(register const u_char *bp, register const u_char *bp2)
  59 {
  60         register const struct ip6_rthdr *dp;
  61         register const struct ip6_rthdr0 *dp0;
  62         register const struct ip6_hdr *ip;
  63         register const u_char *ep;
  64         int i, len;
  65
  66         dp = (struct ip6_rthdr *)bp;
  67         ip = (struct ip6_hdr *)bp2;
  68         len = dp->ip6r_len;
  69
  70         /* 'ep' points to the end of avaible data. */
  71         ep = snapend;
  72
  73 #if 0
  74         printf("%s > %s: ",
  75                ip6addr_string(&ip->ip6_src),
  76                ip6addr_string(&ip->ip6_dst));
  77 #endif
  78
  79         TCHECK(dp->ip6r_segleft);
  80
  81         printf("srcrt (len=%d, ", dp->ip6r_len);
  82         printf("type=%d, ", dp->ip6r_type);
  83         printf("segleft=%d, ", dp->ip6r_segleft);
  84
  85         switch(dp->ip6r_type) {
  86         case IPV6_RTHDR_TYPE_0:
  87                 dp0 = (struct ip6_rthdr0 *)dp;
  88
  89                 TCHECK(dp0->ip6r0_reserved);
  90                 if (dp0->ip6r0_reserved || vflag) {
  91                         printf("rsv=0x%0x, ",
  92                                 (u_int32_t)ntohl(dp0->ip6r0_reserved));
  93                 }
  94
  95                 if (len % 2 == 1)
  96                         goto trunc;
  97                 len >>= 1;
  98                 for (i = 0; i < len; i++) {
  99                         struct in6_addr *addr;
 100
 101                         addr = ((struct in6_addr *)(dp0 + 1)) + i;
 102                         if ((u_char *)addr > ep - sizeof(*addr))
 103                                 goto trunc;
 104
 105                         printf("[%d]%s", i, ip6addr_string((u_char *)addr));
 106                         if (i != len - 1)
 107                                 printf(", ");
 108
 109                 }
 110                 printf(")");
 111                 return((dp0->ip6r0_len + 1) << 3);
 112                 break;
 113         default:
 114                 goto trunc;
 115                 break;
 116         }
 117
 118  trunc:
 119         fputs("[|srcrt]", stdout);
 120         return 65535;           /* XXX */
 121 }
 122 #endif /* INET6 */