ipsec-tools/libipsec/ipsec_get_policylen.c

   1 /*      $KAME: ipsec_get_policylen.c,v 1.5 2000/05/07 05:25:03 itojun Exp $     */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #ifdef HAVE_CONFIG_H
  33 #include "config.h"
  34 #endif
  35
  36 #include <sys/types.h>
  37 #include <sys/param.h>
  38 #include <sys/socket.h>
  39 #include <string.h>
  40
  41 #ifdef HAVE_NETINET6_IPSEC
  42 #  include <netinet6/ipsec.h>
  43 #else
  44 #  include <netinet/ipsec.h>
  45 #endif
  46
  47 #ifdef __APPPLE__
  48 #include <net/pfkeyv2.h>
  49 #else
  50 #include <net/pfkeyv2.h>
  51 #endif
  52
  53 #include "libpfkey.h"
  54 #include "ipsec_strerror.h"
  55
  56 int
  57 ipsec_get_policylen(ipsec_policy_t policy)
  58 {
  59     u_int16_t aligned_len;
  60
  61     if (policy) {
  62         memcpy(&aligned_len, policy, sizeof(u_int16_t));
  63         return PFKEY_UNUNIT64(aligned_len);
  64     } else
  65         return -1;
  66 }