//==========================================================================////      include/netinet6/ah.h////==========================================================================//####BSDCOPYRIGHTBEGIN####//// -------------------------------------------//// Portions of this software may have been derived from OpenBSD, // FreeBSD or other sources, and are covered by the appropriate// copyright disclaimers included herein.//// Portions created by Red Hat are// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.//// -------------------------------------------////####BSDCOPYRIGHTEND####/*	$KAME: ah.h,v 1.16 2001/09/04 08:43:19 itojun Exp $	*//* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. *//* * RFC1826/2402 authentication header. */#ifndef _NETINET6_AH_H_#define _NETINET6_AH_H_struct ah {	u_int8_t	ah_nxt;		/* Next Header */	u_int8_t	ah_len;		/* Length of data, in 32bit */	u_int16_t	ah_reserve;	/* Reserved for future use */	u_int32_t	ah_spi;		/* Security parameter index */	/* variable size, 32bit bound*/	/* Authentication data */};struct newah {	u_int8_t	ah_nxt;		/* Next Header */	u_int8_t	ah_len;		/* Length of data + 1, in 32bit */	u_int16_t	ah_reserve;	/* Reserved for future use */	u_int32_t	ah_spi;		/* Security parameter index */	u_int32_t	ah_seq;		/* Sequence number field */	/* variable size, 32bit bound*/	/* Authentication data */};#ifdef _KERNELstruct secasvar;struct ah_algorithm_state {	struct secasvar *sav;	void* foo;	/* per algorithm data - maybe */};struct ah_algorithm {	int (*sumsiz) __P((struct secasvar *));	int (*mature) __P((struct secasvar *));	int keymin;	/* in bits */	int keymax;	/* in bits */	const char *name;	int (*init) __P((struct ah_algorithm_state *, struct secasvar *));	void (*update) __P((struct ah_algorithm_state *, caddr_t, size_t));	void (*result) __P((struct ah_algorithm_state *, caddr_t));};#define	AH_MAXSUMSIZE	16extern const struct ah_algorithm *ah_algorithm_lookup __P((int));/* cksum routines */extern int ah_hdrlen __P((struct secasvar *));extern size_t ah_hdrsiz __P((struct ipsecrequest *));#if (defined(__FreeBSD__) && __FreeBSD__ >= 4)extern void ah4_input __P((struct mbuf *, int));#elseextern void ah4_input __P((struct mbuf *, ...));#endif /* (defined(__FreeBSD__) && __FreeBSD__ >= 4) */extern int ah4_output __P((struct mbuf *, struct ipsecrequest *));extern int ah4_calccksum __P((struct mbuf *, caddr_t, size_t,	const struct ah_algorithm *, struct secasvar *));#if defined(__NetBSD__) && __NetBSD_Version__ >= 105080000	/* 1.5H */extern void *ah4_ctlinput __P((int, struct sockaddr *, void *));#endif#ifdef INET6extern int ah6_input __P((struct mbuf **, int *, int));extern int ah6_output __P((struct mbuf *, u_char *, struct mbuf *,	struct ipsecrequest *));extern int ah6_calccksum __P((struct mbuf *, caddr_t, size_t,	const struct ah_algorithm *, struct secasvar *));extern void ah6_ctlinput __P((int, struct sockaddr *, void *));#endif /* INET6 */#endif /* _KERNEL */#endif /* _NETINET6_AH_H_ */