1a9643ea8Slogwang /* $FreeBSD$ */ 2a9643ea8Slogwang /* $KAME: ipcomp.h,v 1.8 2000/09/26 07:55:14 itojun Exp $ */ 3a9643ea8Slogwang 4a9643ea8Slogwang /*- 5*22ce4affSfengbojiang * SPDX-License-Identifier: BSD-3-Clause 6*22ce4affSfengbojiang * 7a9643ea8Slogwang * Copyright (C) 1999 WIDE Project. 8a9643ea8Slogwang * All rights reserved. 9a9643ea8Slogwang * 10a9643ea8Slogwang * Redistribution and use in source and binary forms, with or without 11a9643ea8Slogwang * modification, are permitted provided that the following conditions 12a9643ea8Slogwang * are met: 13a9643ea8Slogwang * 1. Redistributions of source code must retain the above copyright 14a9643ea8Slogwang * notice, this list of conditions and the following disclaimer. 15a9643ea8Slogwang * 2. Redistributions in binary form must reproduce the above copyright 16a9643ea8Slogwang * notice, this list of conditions and the following disclaimer in the 17a9643ea8Slogwang * documentation and/or other materials provided with the distribution. 18a9643ea8Slogwang * 3. Neither the name of the project nor the names of its contributors 19a9643ea8Slogwang * may be used to endorse or promote products derived from this software 20a9643ea8Slogwang * without specific prior written permission. 21a9643ea8Slogwang * 22a9643ea8Slogwang * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 23a9643ea8Slogwang * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24a9643ea8Slogwang * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25a9643ea8Slogwang * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 26a9643ea8Slogwang * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27a9643ea8Slogwang * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28a9643ea8Slogwang * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29a9643ea8Slogwang * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30a9643ea8Slogwang * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31a9643ea8Slogwang * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32a9643ea8Slogwang * SUCH DAMAGE. 33a9643ea8Slogwang */ 34a9643ea8Slogwang 35a9643ea8Slogwang /* 36a9643ea8Slogwang * RFC2393 IP payload compression protocol (IPComp). 37a9643ea8Slogwang */ 38a9643ea8Slogwang 39a9643ea8Slogwang #ifndef _NETIPSEC_IPCOMP_H_ 40a9643ea8Slogwang #define _NETIPSEC_IPCOMP_H_ 41a9643ea8Slogwang 42a9643ea8Slogwang struct ipcomp { 43a9643ea8Slogwang u_int8_t comp_nxt; /* Next Header */ 44a9643ea8Slogwang u_int8_t comp_flags; /* reserved, must be zero */ 45a9643ea8Slogwang u_int16_t comp_cpi; /* Compression parameter index */ 46a9643ea8Slogwang }; 47a9643ea8Slogwang 48a9643ea8Slogwang #define IPCOMP_HLENGTH 4 /* Length of IPCOMP header */ 49a9643ea8Slogwang 50a9643ea8Slogwang /* well-known algorithm number (in CPI), from RFC2409 */ 51a9643ea8Slogwang #define IPCOMP_OUI 1 /* vendor specific */ 52a9643ea8Slogwang #define IPCOMP_DEFLATE 2 /* RFC2394 */ 53a9643ea8Slogwang #define IPCOMP_LZS 3 /* RFC2395 */ 54a9643ea8Slogwang #define IPCOMP_MAX 4 55a9643ea8Slogwang 56a9643ea8Slogwang #define IPCOMP_CPI_NEGOTIATE_MIN 256 57a9643ea8Slogwang #endif /*_NETIPSEC_IPCOMP_H_*/ 58