1 /* $FreeBSD$ */ 2 /* $KAME: ipcomp.h,v 1.8 2000/09/26 07:55:14 itojun Exp $ */ 3 4 /*- 5 * Copyright (C) 1999 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 * RFC2393 IP payload compression protocol (IPComp). 35 */ 36 37 #ifndef _NETIPSEC_IPCOMP_H_ 38 #define _NETIPSEC_IPCOMP_H_ 39 40 struct ipcomp { 41 u_int8_t comp_nxt; /* Next Header */ 42 u_int8_t comp_flags; /* reserved, must be zero */ 43 u_int16_t comp_cpi; /* Compression parameter index */ 44 }; 45 46 #define IPCOMP_HLENGTH 4 /* Length of IPCOMP header */ 47 48 /* well-known algorithm number (in CPI), from RFC2409 */ 49 #define IPCOMP_OUI 1 /* vendor specific */ 50 #define IPCOMP_DEFLATE 2 /* RFC2394 */ 51 #define IPCOMP_LZS 3 /* RFC2395 */ 52 #define IPCOMP_MAX 4 53 54 #define IPCOMP_CPI_NEGOTIATE_MIN 256 55 #endif /*_NETIPSEC_IPCOMP_H_*/ 56