1/* $KAME: ipcomp.h,v 1.8 2000/09/26 07:55:14 itojun Exp $ */ 2 3/*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (C) 1999 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 * RFC2393 IP payload compression protocol (IPComp). 36 */ 37 38#ifndef _NETIPSEC_IPCOMP_H_ 39#define _NETIPSEC_IPCOMP_H_ 40 41struct ipcomp { 42 u_int8_t comp_nxt; /* Next Header */ 43 u_int8_t comp_flags; /* reserved, must be zero */ 44 u_int16_t comp_cpi; /* Compression parameter index */ 45}; 46 47#define IPCOMP_HLENGTH 4 /* Length of IPCOMP header */ 48 49/* well-known algorithm number (in CPI), from RFC2409 */ 50#define IPCOMP_OUI 1 /* vendor specific */ 51#define IPCOMP_DEFLATE 2 /* RFC2394 */ 52#define IPCOMP_LZS 3 /* RFC2395 */ 53#define IPCOMP_MAX 4 54 55#define IPCOMP_CPI_NEGOTIATE_MIN 256 56#endif /*_NETIPSEC_IPCOMP_H_*/ 57