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      1 /*	$NetBSD: ah.h,v 1.3 2018/04/19 08:27:38 maxv Exp $	*/
      2 /*	$FreeBSD: ah.h,v 1.1.4.1 2003/01/24 05:11:35 sam Exp $	*/
      3 /*	$KAME: ah.h,v 1.13 2000/10/18 21:28:00 itojun Exp $	*/
      4 
      5 /*
      6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. Neither the name of the project nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 /*
     35  * RFC1826/2402 authentication header.
     36  */
     37 
     38 #ifndef _NETIPSEC_AH_H_
     39 #define _NETIPSEC_AH_H_
     40 
     41 struct ah {
     42 	u_int8_t	ah_nxt;		/* Next Header */
     43 	u_int8_t	ah_len;		/* Length of data, in 32bit */
     44 	u_int16_t	ah_reserve;	/* Reserved for future use */
     45 	u_int32_t	ah_spi;		/* Security parameter index */
     46 	/* variable size, 32bit bound*/	/* Authentication data */
     47 };
     48 
     49 struct newah {
     50 	u_int8_t	ah_nxt;		/* Next Header */
     51 	u_int8_t	ah_len;		/* Length of data + 1, in 32bit */
     52 	u_int16_t	ah_reserve;	/* Reserved for future use */
     53 	u_int32_t	ah_spi;		/* Security parameter index */
     54 	u_int32_t	ah_seq;		/* Sequence number field */
     55 	/* variable size, 32bit bound*/	/* Authentication data */
     56 };
     57 #endif /* !_NETIPSEC_AH_H_ */
     58