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FreeBSD/Linux Kernel Cross Reference
sys/netipsec/ipcomp.h

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    1 /*      $NetBSD: ipcomp.h,v 1.2 2005/12/10 23:44:08 elad Exp $  */
    2 /*      $FreeBSD: src/sys/netipsec/ipcomp.h,v 1.1.4.1 2003/01/24 05:11:35 sam Exp $     */
    3 /*      $KAME: ipcomp.h,v 1.8 2000/09/26 07:55:14 itojun Exp $  */
    4 
    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 
   41 struct 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_ */

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