contrib/tcpdump/print-enc.c

   1 /*      $OpenBSD: print-enc.c,v 1.7 2002/02/19 19:39:40 millert Exp $   */
   2
   3 /*
   4  * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23
  24 #ifndef lint
  25 static const char rcsid[] _U_ =
  26     "@(#) $Header: /tcpdump/master/tcpdump/print-enc.c,v 1.4.4.1 2008-02-06 10:34:15 guy Exp $ (LBL)";
  27 #endif
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include <tcpdump-stdinc.h>
  34
  35 #include <pcap.h>
  36
  37 #include "interface.h"
  38 #include "addrtoname.h"
  39
  40 #include "enc.h"
  41
  42 #define ENC_PRINT_TYPE(wh, xf, nam) \
  43         if ((wh) & (xf)) { \
  44                 printf("%s%s", nam, (wh) == (xf) ? "): " : ","); \
  45                 (wh) &= ~(xf); \
  46         }
  47
  48 u_int
  49 enc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
  50 {
  51         register u_int length = h->len;
  52         register u_int caplen = h->caplen;
  53         int flags;
  54         const struct enchdr *hdr;
  55
  56         if (caplen < ENC_HDRLEN) {
  57                 printf("[|enc]");
  58                 goto out;
  59         }
  60
  61         hdr = (struct enchdr *)p;
  62         flags = hdr->flags;
  63         if (flags == 0)
  64                 printf("(unprotected): ");
  65         else
  66                 printf("(");
  67         ENC_PRINT_TYPE(flags, M_AUTH, "authentic");
  68         ENC_PRINT_TYPE(flags, M_CONF, "confidential");
  69         /* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */
  70         printf("SPI 0x%08x: ", (u_int32_t)ntohl(hdr->spi));
  71
  72         length -= ENC_HDRLEN;
  73         caplen -= ENC_HDRLEN;
  74         p += ENC_HDRLEN;
  75
  76         switch (hdr->af) {
  77         case AF_INET:
  78                 ip_print(gndo, p, length);
  79                 break;
  80         case AF_INET6:
  81                 ip6_print(p, length);
  82                 break;
  83         }
  84
  85 out:
  86         return (ENC_HDRLEN);
  87 }
  88
  89
  90 /*
  91  * Local Variables:
  92  * c-style: whitesmith
  93  * c-basic-offset: 8
  94  * End:
  95  */