1 /* $FreeBSD$ */ 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_*/ 70