The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/netipsec/key.h

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    1 /*      $NetBSD: key.h,v 1.38 2022/12/08 08:05:03 knakahara Exp $       */
    2 /*      $FreeBSD: 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 secasindex;
   46 union sockaddr_union;
   47 
   48 #include <net/pfkeyv2.h>
   49 
   50 struct sadb_msghdr {
   51         struct sadb_msg *msg;
   52         void *ext[SADB_EXT_MAX + 1];
   53         int extoff[SADB_EXT_MAX + 1];
   54         int extlen[SADB_EXT_MAX + 1];
   55 };
   56 
   57 int key_havesp(u_int dir);
   58 struct secpolicy *key_lookup_sp_byspidx(const struct secpolicyindex *, u_int,
   59     const char *, int);
   60 struct secpolicy *key_newsp(const char*, int);
   61 struct secpolicy *key_gettunnel(const struct sockaddr *,
   62     const struct sockaddr *, const struct sockaddr *,
   63     const struct sockaddr *, const char *, int);
   64 /* NB: prepend with _ for KAME IPv6 compatibility */
   65 void key_init_sp(struct secpolicy *);
   66 void key_free_sp(struct secpolicy *);
   67 u_int key_sp_refcnt(const struct secpolicy *);
   68 void key_sp_ref(struct secpolicy *, const char *, int);
   69 void key_sp_unref(struct secpolicy *, const char *, int);
   70 void key_sp_touch(struct secpolicy *);
   71 void key_sa_ref(struct secasvar *, const char *, int);
   72 void key_sa_unref(struct secasvar *, const char *, int);
   73 u_int key_sa_refcnt(const struct secasvar *);
   74 
   75 void key_socksplist_add(struct secpolicy *);
   76 
   77 /*
   78  * Access to the SADB are interlocked with splsoftnet.  In particular,
   79  * holders of SA's use this to block accesses by protocol processing
   80  * that can happen either by network swi's or by continuations that
   81  * occur on crypto callbacks.  Much of this could go away if
   82  * key_checkrequest were redone.
   83  */
   84 #define KEY_LOOKUP_SP_BYSPIDX(spidx, dir)                       \
   85         key_lookup_sp_byspidx(spidx, dir, __func__, __LINE__)
   86 #define KEY_NEWSP()                                             \
   87         key_newsp(__func__, __LINE__)
   88 #define KEY_GETTUNNEL(osrc, odst, isrc, idst)                   \
   89         key_gettunnel(osrc, odst, isrc, idst, __func__, __LINE__)
   90 #define KEY_SP_UNREF(spp)                                       \
   91         key_sp_unref(*(spp), __func__, __LINE__)
   92 #define KEY_SP_REF(sp)                                          \
   93         key_sp_ref(sp, __func__, __LINE__)
   94 #define KEY_SA_REF(sav)                                         \
   95         key_sa_ref(sav, __func__, __LINE__)
   96 #define KEY_SA_UNREF(psav)                                      \
   97         key_sa_unref(*(psav), __func__, __LINE__)
   98 
   99 struct secasvar *key_lookup_sa(const union sockaddr_union *,
  100     u_int, u_int32_t, u_int16_t, u_int16_t, const char *, int);
  101 void key_freesav(struct secasvar **, const char *, int);
  102 struct secasvar *key_lookup_sa_bysaidx(const struct secasindex *);
  103 
  104 #define KEY_LOOKUP_SA(dst, proto, spi, sport, dport)            \
  105         key_lookup_sa(dst, proto, spi, sport, dport,  __func__, __LINE__)
  106 
  107 int key_checktunnelsanity(struct secasvar *, u_int, void *, void *);
  108 int key_checkrequest(const struct ipsecrequest *, const struct secasindex *,
  109     struct secasvar **);
  110 
  111 struct secpolicy *key_msg2sp(const struct sadb_x_policy *, size_t, int *);
  112 struct mbuf *key_sp2msg(const struct secpolicy *, int);
  113 int key_ismyaddr(const struct sockaddr *);
  114 int key_spdacquire(const struct secpolicy *);
  115 u_long key_random(void);
  116 void key_randomfill(void *, size_t);
  117 void key_freereg(struct socket *);
  118 int key_parse(struct mbuf *, struct socket *);
  119 void key_init(void);
  120 void key_sa_recordxfer(struct secasvar *, struct mbuf *);
  121 void key_sa_routechange(struct sockaddr *);
  122 void key_update_used(void);
  123 int key_get_used(void);
  124 
  125 u_int16_t key_portfromsaddr(const union sockaddr_union *);
  126 
  127 /* for ipsec(4) */
  128 struct secpolicy *key_kpi_spdadd(struct mbuf *);
  129 int key_kpi_spddelete2(struct mbuf *);
  130 u_int16_t key_newreqid(void);
  131 
  132 #endif /* defined(_KERNEL) */
  133 #endif /* !_NETIPSEC_KEY_H_ */

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