/*      $NetBSD: ah.h,v 1.3 2018/04/19 08:27:38 maxv Exp $      */
/*      $FreeBSD: ah.h,v 1.1.4.1 2003/01/24 05:11:35 sam Exp $  */
/*      $KAME: ah.h,v 1.13 2000/10/18 21:28:00 itojun Exp $     */

/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

/*
* RFC1826/2402 authentication header.
*/

#ifndef _NETIPSEC_AH_H_
#define _NETIPSEC_AH_H_

struct ah {
       u_int8_t        ah_nxt;         /* Next Header */
       u_int8_t        ah_len;         /* Length of data, in 32bit */
       u_int16_t       ah_reserve;     /* Reserved for future use */
       u_int32_t       ah_spi;         /* Security parameter index */
       /* variable size, 32bit bound*/ /* Authentication data */
};

struct newah {
       u_int8_t        ah_nxt;         /* Next Header */
       u_int8_t        ah_len;         /* Length of data + 1, in 32bit */
       u_int16_t       ah_reserve;     /* Reserved for future use */
       u_int32_t       ah_spi;         /* Security parameter index */
       u_int32_t       ah_seq;         /* Sequence number field */
       /* variable size, 32bit bound*/ /* Authentication data */
};
#endif /* !_NETIPSEC_AH_H_ */