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     "@(#) /master/usr.sbin/tcpdump/tcpdump/print-icmp.c,v 2.1 1995/02/03 18:14:42 polk Exp (LBL)";
  25 #endif
  26
  27 #ifdef INET6
  28
  29 #include <sys/param.h>
  30 #include <sys/time.h>
  31 #include <sys/types.h>
  32 #include <sys/socket.h>
  33
  34 #include <net/if.h>
  35
  36 #include <netinet/in.h>
  37 #include <netinet/if_ether.h>
  38 #include <netinet/in_systm.h>
  39 #include <netinet/ip.h>
  40 #include <netinet/ip_icmp.h>
  41 #include <netinet/ip_var.h>
  42 #include <netinet/udp.h>
  43 #include <netinet/udp_var.h>
  44 #include <netinet/tcp.h>
  45
  46 #include <stdio.h>
  47
  48 #include <netinet/ip6.h>
  49
  50 #include "interface.h"
  51 #include "addrtoname.h"
  52
  53 int
  54 rt6_print(register const u_char *bp, register const u_char *bp2)
  55 {
  56         register const struct ip6_rthdr0 *dp;
  57         register const struct ip6_hdr *ip;
  58         register const u_char *ep;
  59         u_long bitmap = 0x0800;
  60         u_long slmap;
  61         int i, len;
  62
  63 #if 0
  64 #define TCHECK(var) if ((u_char *)&(var) >= ep - sizeof(var)) goto trunc
  65 #endif
  66
  67         dp = (struct ip6_rthdr0 *)bp;
  68         ip = (struct ip6_hdr *)bp2;
  69         len = dp->ip6r0_len;
  70
  71         /* 'ep' points to the end of avaible data. */
  72         ep = snapend;
  73
  74         printf("%s > %s: ",
  75                ip6addr_string(&ip->ip6_src),
  76                ip6addr_string(&ip->ip6_dst));
  77
  78         TCHECK(dp->ip6r0_slmap[2]);
  79         printf("srcrt (len=%d, ", dp->ip6r0_len);
  80         printf("type=%d, ", dp->ip6r0_type);
  81         printf("segleft=%d, ", dp->ip6r0_segleft);
  82         if (dp->ip6r0_type != 0)
  83                 goto trunc;
  84         slmap = (dp->ip6r0_slmap[0] << 16)
  85               | (dp->ip6r0_slmap[1] <<  8)
  86               | (dp->ip6r0_slmap[2]);
  87         printf("bitmap=");
  88         for (i = 24; i > 0; i--) {
  89                 if (slmap & bitmap)
  90                         printf("S");
  91                 else
  92                         printf("L");
  93                 bitmap >>= 1;
  94         }
  95         if (len % 2 == 1)
  96                 goto trunc;
  97         len >>= 1;
  98         printf(", ");
  99         for (i = 0; i < len; i++) {
 100                 if ((((u_char *)&(dp->ip6r0_reserved)) + sizeof(u_long)
 101                      + (i<<4)) > ep) goto trunc;
 102                 printf(" [%d]%s", i,
 103                        ip6addr_string(((u_char *)&(dp->ip6r0_reserved)) +
 104                                       sizeof(u_long) + (i<<4)));
 105                 if (i != len - 1)
 106                         printf(", ");
 107
 108         }
 109         printf(")");
 110         return((dp->ip6r0_len + 1) << 3);
 111  trunc:
 112         fputs("[|srcrt]", stdout);
 113         return 65535;
 114 #undef TCHECK
 115 }
 116 #endif /* INET6 */