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/*!\file netinet6/ipcomp.h
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*
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*/
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/* $FreeBSD: src/sys/netinet6/ipcomp.h,v 1.4 2002/04/19 04:46:23 suz Exp $ */
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/* $KAME: ipcomp.h,v 1.11 2001/09/04 08:43:19 itojun Exp $ */
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/*
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* Copyright (C) 1999 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* RFC2393 IP payload compression protocol (IPComp).
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*/
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#ifndef _NETINET6_IPCOMP_H_
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#define _NETINET6_IPCOMP_H_
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#if defined(_KERNEL) && !defined(_LKM)
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#include "opt_inet.h"
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#endif
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struct ipcomp {
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u_int8_t comp_nxt; /* Next Header */
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u_int8_t comp_flags; /* reserved, must be zero */
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u_int16_t comp_cpi; /* Compression parameter index */
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};
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/* well-known algorithm number (in CPI), from RFC2409 */
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#define IPCOMP_OUI 1 /* vendor specific */
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#define IPCOMP_DEFLATE 2 /* RFC2394 */
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#define IPCOMP_LZS 3 /* RFC2395 */
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#define IPCOMP_MAX 4
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#define IPCOMP_CPI_NEGOTIATE_MIN 256
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#ifdef _KERNEL
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struct ipcomp_algorithm {
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int (*compress) __P((struct mbuf *, struct mbuf *, size_t *));
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int (*decompress) __P((struct mbuf *, struct mbuf *, size_t *));
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size_t minplen; /* minimum required length for compression */
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};
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struct ipsecrequest;
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extern const struct ipcomp_algorithm *ipcomp_algorithm_lookup __P((int));
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extern void ipcomp4_input __P((struct mbuf *, int));
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extern int ipcomp4_output __P((struct mbuf *, struct ipsecrequest *));
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#endif /* KERNEL */
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#endif /* _NETINET6_IPCOMP_H_ */
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