/*
 * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Niels Provos.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */
/* $Id: spi.h,v 1.5 2000/12/15 01:06:51 provos Exp $ */
/*
 * spi.h: 
 * security paramter index creation.
 */
 
#ifndef _SPI_H_
#define _SPI_H_
#include <sys/queue.h>
#include "state.h"

#undef EXTERN
 
#ifdef _SPI_C_
#define EXTERN
#else
#define EXTERN extern
#endif

#define SPI_LIFETIME   1800            /* 30 minutes default lifetime */

#define SPI_OWNER	0x0001
#define SPI_NOTIFY	0x0002
#define SPI_UPDATED	0x0004
#define SPI_ESP		0x0008	       /* Is used for ESP */

struct spiob {
     TAILQ_ENTRY(spiob) next;          /* Linked list */

     char *address;
     char *local_address;
     int flags;
     u_int8_t SPI[SPI_SIZE];           /* SPI */ 
     u_int8_t icookie[COOKIE_SIZE];    /* Initator cookie */
     u_int8_t *attributes;             /* SPI attributes */
     u_int16_t attribsize;
     u_int8_t *sessionkey;             /* to be delete after use */
     u_int16_t sessionkeysize; 
     time_t lifetime;                  /* Lifetime for the SPI */
};

EXTERN void spi_init(void);
EXTERN time_t getspilifetime(struct stateob *st);
EXTERN int make_spi(struct stateob *st, char *local_address,
		    u_int8_t *SPI, time_t *lifetime, 
		    u_int8_t **attributes, u_int16_t *attribsize);

EXTERN int spi_insert(struct spiob *);
EXTERN int spi_unlink(struct spiob *);
EXTERN struct spiob *spi_new(char *, u_int8_t *);
EXTERN int spi_value_reset(struct spiob *);
EXTERN struct spiob *spi_find_attrib(char *address,
				     u_int8_t *attrib, u_int16_t attribsize);
EXTERN struct spiob *spi_find(char *, u_int8_t *);
EXTERN void spi_expire(void);
EXTERN void spi_update(int, u_int8_t *);
EXTERN void spi_update_insert(struct spiob *);

#endif /* _SPI_H */