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