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