The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netipsec/esp.h

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    1 /*      $FreeBSD: releng/12.0/sys/netipsec/esp.h 326023 2017-11-20 19:43:44Z pfg $      */
    2 /*      $KAME: esp.h,v 1.16 2000/10/18 21:28:00 itojun Exp $    */
    3 
    4 /*-
    5  * SPDX-License-Identifier: BSD-3-Clause
    6  *
    7  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    8  * All rights reserved.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. Neither the name of the project nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  */
   34 
   35 /*
   36  * RFC1827/2406 Encapsulated Security Payload.
   37  */
   38 
   39 #ifndef _NETIPSEC_ESP_H_
   40 #define _NETIPSEC_ESP_H_
   41 
   42 struct esp {
   43         u_int32_t       esp_spi;        /* ESP */
   44         /*variable size, 32bit bound*/  /* Initialization Vector */
   45         /*variable size*/               /* Payload data */
   46         /*variable size*/               /* padding */
   47         /*8bit*/                        /* pad length */
   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 length */
   58         /*8bit*/                        /* next header */
   59         /*variable size, 32bit bound*/  /* Authentication data */
   60 };
   61 
   62 struct esptail {
   63         u_int8_t        esp_padlen;     /* pad length */
   64         u_int8_t        esp_nxt;        /* Next header */
   65         /*variable size, 32bit bound*/  /* Authentication data (new IPsec)*/
   66 };
   67         
   68 #define ESP_ALEN        12      /* 96-bit authenticator */
   69 #endif /*_NETIPSEC_ESP_H_*/

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