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//==========================================================================

//

//      include/netkey/keydb.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: keydb.h,v 1.14 2000/08/02 17:58:26 sakane 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.

 */

#ifndef _NETKEY_KEYDB_H_

#define _NETKEY_KEYDB_H_

#ifdef _KERNEL

#include <netkey/key_var.h>

/* Security Assocciation Index */

/* NOTE: Ensure to be same address family */

struct secasindex {

        struct sockaddr_storage src;    /* srouce address for SA */

        struct sockaddr_storage dst;    /* destination address for SA */

        u_int16_t proto;                /* IPPROTO_ESP or IPPROTO_AH */

        u_int8_t mode;                  /* mode of protocol, see ipsec.h */

        u_int32_t reqid;                /* reqid id who owned this SA */

                                        /* see IPSEC_MANUAL_REQID_MAX. */

};

/* Security Association Data Base */

struct secashead {

        LIST_ENTRY(secashead) chain;

        struct secasindex saidx;

        struct sadb_ident *idents;      /* source identity */

        struct sadb_ident *identd;      /* destination identity */

                                        /* XXX I don't know how to use them. */

        u_int8_t state;                 /* MATURE or DEAD. */

        LIST_HEAD(_satree, secasvar) savtree[SADB_SASTATE_MAX+1];

                                        /* SA chain */

                                        /* The first of this list is newer SA */

        struct route sa_route;          /* route cache */

};

/* Security Association */

struct secasvar {

        LIST_ENTRY(secasvar) chain;

        int refcnt;                     /* reference count */

        u_int8_t state;                 /* Status of this Association */

        u_int8_t alg_auth;              /* Authentication Algorithm Identifier*/

        u_int8_t alg_enc;               /* Cipher Algorithm Identifier */

        u_int32_t spi;                  /* SPI Value, network byte order */

        u_int32_t flags;                /* holder for SADB_KEY_FLAGS */

        struct sadb_key *key_auth;      /* Key for Authentication */

        struct sadb_key *key_enc;       /* Key for Encryption */

        caddr_t iv;                     /* Initilization Vector */

        u_int ivlen;                    /* length of IV */

        void *sched;                    /* intermediate encryption key */

        size_t schedlen;

        struct secreplay *replay;       /* replay prevention */

        long created;                   /* for lifetime */

        struct sadb_lifetime *lft_c;    /* CURRENT lifetime, it's constant. */

        struct sadb_lifetime *lft_h;    /* HARD lifetime */

        struct sadb_lifetime *lft_s;    /* SOFT lifetime */

        u_int32_t seq;                  /* sequence number */

        pid_t pid;                      /* message's pid */

        struct secashead *sah;          /* back pointer to the secashead */

};

/* replay prevention */

struct secreplay {

        u_int32_t count;

        u_int wsize;            /* window size, i.g. 4 bytes */

        u_int32_t seq;          /* used by sender */

        u_int32_t lastseq;      /* used by receiver */

        caddr_t bitmap;         /* used by receiver */

        int overflow;           /* overflow flag */

};

/* socket table due to send PF_KEY messages. */

struct secreg {

        LIST_ENTRY(secreg) chain;

        struct socket *so;

};

#ifndef IPSEC_NONBLOCK_ACQUIRE

/* acquiring list table. */

struct secacq {

        LIST_ENTRY(secacq) chain;

        struct secasindex saidx;

        u_int32_t seq;          /* sequence number */

        long created;           /* for lifetime */

        int count;              /* for lifetime */

};

#endif

/* Sensitivity Level Specification */

/* nothing */

#define SADB_KILL_INTERVAL      600     /* six seconds */

struct key_cb {

        int key_count;

        int any_count;

};

/* secpolicy */

extern struct secpolicy *keydb_newsecpolicy __P((void));

extern void keydb_delsecpolicy __P((struct secpolicy *));

/* secashead */

extern struct secashead *keydb_newsecashead __P((void));

extern void keydb_delsecashead __P((struct secashead *));

/* secasvar */

extern struct secasvar *keydb_newsecasvar __P((void));

extern void keydb_refsecasvar __P((struct secasvar *));

extern void keydb_freesecasvar __P((struct secasvar *));

/* secreplay */

extern struct secreplay *keydb_newsecreplay __P((size_t));

extern void keydb_delsecreplay __P((struct secreplay *));

/* secreg */

extern struct secreg *keydb_newsecreg __P((void));

extern void keydb_delsecreg __P((struct secreg *));

#endif /* _KERNEL */

#endif /* _NETKEY_KEYDB_H_ */