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

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    1 /*      $FreeBSD: releng/7.3/sys/netipsec/ipcomp.h 139823 2005-01-07 01:45:51Z imp $    */
    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_*/

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