1 /* $FreeBSD$ */ 2 /* $KAME: esp.h,v 1.16 2000/10/18 21:28:00 itojun Exp $ */ 3 4 /*- 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * RFC1827/2406 Encapsulated Security Payload. 35 */ 36 37 #ifndef _NETIPSEC_ESP_H_ 38 #define _NETIPSEC_ESP_H_ 39 40 struct esp { 41 u_int32_t esp_spi; /* ESP */ 42 /*variable size, 32bit bound*/ /* Initialization Vector */ 43 /*variable size*/ /* Payload data */ 44 /*variable size*/ /* padding */ 45 /*8bit*/ /* pad size */ 46 /*8bit*/ /* next header */ 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 size */ 57 /*8bit*/ /* next header */ 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