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      1 /*	$NetBSD: esp.h,v 1.4 2018/04/19 08:27:38 maxv Exp $	*/
      2 /*	$FreeBSD: esp.h,v 1.1.4.1 2003/01/24 05:11:35 sam Exp $	*/
      3 /*	$KAME: esp.h,v 1.16 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  * RFC1827/2406 Encapsulated Security Payload.
     36  */
     37 
     38 #ifndef _NETIPSEC_ESP_H_
     39 #define _NETIPSEC_ESP_H_
     40 
     41 struct esp {
     42 	u_int32_t	esp_spi;	/* ESP */
     43 	/*variable size, 32bit bound*/	/* Initialization Vector */
     44 	/*variable size*/		/* Payload data */
     45 	/*variable size*/		/* padding */
     46 	/*8bit*/			/* pad size */
     47 	/*8bit*/			/* next header */
     48 	/*8bit*/			/* next header */
     49 	/*variable size, 32bit bound*/	/* Authentication data (new IPsec) */
     50 };
     51 
     52 struct newesp {
     53 	u_int32_t	esp_spi;	/* ESP */
     54 	u_int32_t	esp_seq;	/* Sequence number */
     55 	/*variable size*/		/* (IV and) Payload data */
     56 	/*variable size*/		/* padding */
     57 	/*8bit*/			/* pad size */
     58 	/*8bit*/			/* next header */
     59 	/*8bit*/			/* next header */
     60 	/*variable size, 32bit bound*/	/* Authentication data */
     61 };
     62 
     63 struct esptail {
     64 	u_int8_t	esp_padlen;	/* pad length */
     65 	u_int8_t	esp_nxt;	/* Next header */
     66 	/*variable size, 32bit bound*/	/* Authentication data (new IPsec)*/
     67 };
     68 
     69 #define ESP_ALEN	12	/* 96-bit authenticator */
     70 #endif /* !_NETIPSEC_ESP_H_ */
     71