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key.h revision 1.29 
      1 /*	$NetBSD: key.h,v 1.29 2017/08/09 09:48:11 ozaki-r Exp $	*/
      2 /*	$FreeBSD: src/sys/netipsec/key.h,v 1.1.4.1 2003/01/24 05:11:36 sam Exp $	*/
      3 /*	$KAME: key.h,v 1.21 2001/07/27 03:51:30 itojun Exp $	*/
      4 
      5 /*
      6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. Neither the name of the project nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef _NETIPSEC_KEY_H_
     35 #define _NETIPSEC_KEY_H_
     36 
     37 #ifdef _KERNEL
     38 
     39 struct secpolicy;
     40 struct secpolicyindex;
     41 struct ipsecrequest;
     42 struct secasvar;
     43 struct sockaddr;
     44 struct socket;
     45 struct sadb_msg;
     46 struct sadb_x_policy;
     47 struct secasindex;
     48 union sockaddr_union;
     49 
     50 int key_havesp(u_int dir);
     51 struct secpolicy *key_lookup_sp_byspidx(const struct secpolicyindex *, u_int,
     52 	const char*, int);
     53 struct secpolicy *key_newsp(const char*, int);
     54 struct secpolicy *key_gettunnel(const struct sockaddr *,
     55 	const struct sockaddr *, const struct sockaddr *,
     56 	const struct sockaddr *, const char*, int);
     57 /* NB: prepend with _ for KAME IPv6 compatbility */
     58 void key_init_sp(struct secpolicy *);
     59 void key_free_sp(struct secpolicy *);
     60 u_int key_sp_refcnt(const struct secpolicy *);
     61 void key_sp_ref(struct secpolicy *, const char*, int);
     62 void key_sp_unref(struct secpolicy *, const char*, int);
     63 void key_sa_ref(struct secasvar *, const char*, int);
     64 void key_sa_unref(struct secasvar *, const char*, int);
     65 u_int key_sa_refcnt(const struct secasvar *);
     66 
     67 void key_socksplist_add(struct secpolicy *);
     68 
     69 /*
     70  * Access to the SADB are interlocked with splsoftnet.  In particular,
     71  * holders of SA's use this to block accesses by protocol processing
     72  * that can happen either by network swi's or by continuations that
     73  * occur on crypto callbacks.  Much of this could go away if
     74  * key_checkrequest were redone.
     75  */
     76 #define	KEY_LOOKUP_SP_BYSPIDX(spidx, dir)			\
     77 	key_lookup_sp_byspidx(spidx, dir, __func__, __LINE__)
     78 #define	KEY_NEWSP()						\
     79 	key_newsp(__func__, __LINE__)
     80 #define	KEY_GETTUNNEL(osrc, odst, isrc, idst)			\
     81 	key_gettunnel(osrc, odst, isrc, idst, __func__, __LINE__)
     82 #define	KEY_SP_UNREF(spp)					\
     83 	key_sp_unref(*(spp), __func__, __LINE__)
     84 #define	KEY_SP_REF(sp)						\
     85 	key_sp_ref(sp, __func__, __LINE__)
     86 #define KEY_SA_REF(sav)						\
     87 	key_sa_ref(sav, __func__, __LINE__)
     88 #define	KEY_SA_UNREF(psav)					\
     89 	key_sa_unref(*(psav), __func__, __LINE__)
     90 
     91 struct secasvar *key_lookup_sa(const union sockaddr_union *,
     92 		u_int, u_int32_t, u_int16_t, u_int16_t, const char*, int);
     93 void key_freesav(struct secasvar **, const char*, int);
     94 
     95 #define	KEY_LOOKUP_SA(dst, proto, spi, sport, dport)		\
     96 	key_lookup_sa(dst, proto, spi, sport, dport,  __func__, __LINE__)
     97 
     98 int key_checktunnelsanity (struct secasvar *, u_int, void *, void *);
     99 int key_checkrequest(struct ipsecrequest *, struct secasvar **);
    100 
    101 struct secpolicy *key_msg2sp (const struct sadb_x_policy *, size_t, int *);
    102 struct mbuf *key_sp2msg (const struct secpolicy *);
    103 int key_ismyaddr (const struct sockaddr *);
    104 int key_spdacquire (const struct secpolicy *);
    105 u_long key_random (void);
    106 void key_randomfill (void *, size_t);
    107 void key_freereg (struct socket *);
    108 int key_parse (struct mbuf *, struct socket *);
    109 void key_init (void);
    110 void key_sa_recordxfer (struct secasvar *, struct mbuf *);
    111 void key_sa_routechange (struct sockaddr *);
    112 void key_update_used(void);
    113 int key_get_used(void);
    114 
    115 u_int16_t key_portfromsaddr (const union sockaddr_union *);
    116 
    117 
    118 
    119 #ifdef MALLOC_DECLARE
    120 MALLOC_DECLARE(M_SECA);
    121 #endif /* MALLOC_DECLARE */
    122 
    123 #endif /* defined(_KERNEL) */
    124 #endif /* !_NETIPSEC_KEY_H_ */
    125