sys/netipsec/esp.h

   1 /*      $NetBSD: esp.h,v 1.2 2005/02/26 22:45:13 perry Exp $    */
   2 /*      $FreeBSD: src/sys/netipsec/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_ */