1 /* $KAME: esp.h,v 1.16 2000/10/18 21:28:00 itojun Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 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 length */ 47 /*8bit*/ /* next header */ 48 /*variable size, 32bit bound*/ /* Authentication data (new IPsec) */ 49 }; 50 51 struct newesp { 52 u_int32_t esp_spi; /* ESP */ 53 u_int32_t esp_seq; /* Sequence number */ 54 /*variable size*/ /* (IV and) Payload data */ 55 /*variable size*/ /* padding */ 56 /*8bit*/ /* pad length */ 57 /*8bit*/ /* next header */ 58 /*variable size, 32bit bound*/ /* Authentication data */ 59 }; 60 61 struct esptail { 62 u_int8_t esp_padlen; /* pad length */ 63 u_int8_t esp_nxt; /* Next header */ 64 /*variable size, 32bit bound*/ /* Authentication data (new IPsec)*/ 65 }; 66 67 #define ESP_ALEN 12 /* 96-bit authenticator */ 68 #endif /*_NETIPSEC_ESP_H_*/ 69