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/netkey/keydb.h

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    1 /*      $NetBSD: keydb.h,v 1.26 2005/12/11 00:02:28 elad Exp $  */
    2 /*      $KAME: keydb.h,v 1.23 2003/09/07 05:25:20 itojun Exp $  */
    3 
    4 /*
    5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 #ifndef _NETKEY_KEYDB_H_
   34 #define _NETKEY_KEYDB_H_
   35 
   36 #ifdef _KERNEL
   37 
   38 #if defined(_KERNEL_OPT)
   39 #include "opt_ipsec.h"
   40 #endif
   41 
   42 #include <sys/mallocvar.h>
   43 #include <netkey/key_var.h>
   44 
   45 MALLOC_DECLARE(M_SECA);
   46 
   47 /* Security Assocciation Index */
   48 /* NOTE: Ensure to be same address family */
   49 struct secasindex {
   50         struct sockaddr_storage src;    /* srouce address for SA */
   51         struct sockaddr_storage dst;    /* destination address for SA */
   52         u_int16_t proto;                /* IPPROTO_ESP or IPPROTO_AH */
   53         u_int8_t mode;                  /* mode of protocol, see ipsec.h */
   54         u_int16_t reqid;                /* reqid id who owned this SA */
   55                                         /* see IPSEC_MANUAL_REQID_MAX. */
   56 };
   57 
   58 /* Security Association Data Base */
   59 struct secashead {
   60         LIST_ENTRY(secashead) chain;
   61 
   62         struct secasindex saidx;
   63 
   64         struct sadb_ident *idents;      /* source identity */
   65         struct sadb_ident *identd;      /* destination identity */
   66                                         /* XXX I don't know how to use them. */
   67 
   68         u_int8_t state;                 /* MATURE or DEAD. */
   69         LIST_HEAD(_satree, secasvar) savtree[SADB_SASTATE_MAX+1];
   70                                         /* SA chain */
   71                                         /* The first of this list is newer SA */
   72 
   73         union {
   74                 struct route sau_route;
   75                 struct route_in6 sau_route6;
   76         } sa_u;
   77 #define sa_route sa_u.sau_route
   78 };
   79 
   80 /* Security Association */
   81 struct secasvar {
   82         TAILQ_ENTRY(secasvar) tailq;
   83         LIST_ENTRY(secasvar) chain;
   84         LIST_ENTRY(secasvar) spihash;
   85 
   86         int refcnt;                     /* reference count */
   87         u_int8_t state;                 /* Status of this Association */
   88 
   89         u_int8_t alg_auth;              /* Authentication Algorithm Identifier*/
   90         u_int8_t alg_enc;               /* Cipher Algorithm Identifier */
   91         u_int32_t spi;                  /* SPI Value, network byte order */
   92         u_int32_t flags;                /* holder for SADB_KEY_FLAGS */
   93 
   94         struct sadb_key *key_auth;      /* Key for Authentication */
   95         struct sadb_key *key_enc;       /* Key for Encryption */
   96         caddr_t iv;                     /* Initilization Vector */
   97         u_int ivlen;                    /* length of IV */
   98         void *sched;                    /* intermediate encryption key */
   99         size_t schedlen;
  100 
  101         struct secreplay *replay;       /* replay prevention */
  102         long created;                   /* for lifetime */
  103 
  104         struct sadb_lifetime *lft_c;    /* CURRENT lifetime, it's constant. */
  105         struct sadb_lifetime *lft_h;    /* HARD lifetime */
  106         struct sadb_lifetime *lft_s;    /* SOFT lifetime */
  107 
  108         u_int64_t seq;                  /* sequence number */
  109         pid_t pid;                      /* message's pid */
  110 
  111         struct secashead *sah;          /* back pointer to the secashead */
  112 
  113         u_int32_t id;                   /* SA id */
  114         /* Nat-Traversal state */
  115 #ifdef IPSEC_NAT_T
  116         u_int16_t       natt_type;
  117         u_int16_t       esp_frag;
  118 #endif
  119 };
  120 
  121 /* replay prevention */
  122 struct secreplay {
  123         u_int64_t count;
  124         u_int wsize;            /* window size, i.g. 4 bytes */
  125         u_int64_t seq;          /* used by sender */
  126         u_int64_t lastseq;      /* used by receiver */
  127         u_int8_t *bitmap;       /* used by receiver */
  128         int overflow;           /* what round does the counter take. */
  129 };
  130 
  131 /* socket table due to send PF_KEY messages. */
  132 struct secreg {
  133         LIST_ENTRY(secreg) chain;
  134 
  135         struct socket *so;
  136 };
  137 
  138 #ifndef IPSEC_NONBLOCK_ACQUIRE
  139 /* acquiring list table. */
  140 struct secacq {
  141         LIST_ENTRY(secacq) chain;
  142 
  143         struct secasindex saidx;
  144 
  145         u_int32_t seq;          /* sequence number */
  146         long created;           /* for lifetime */
  147         int count;              /* for lifetime */
  148 };
  149 #endif
  150 
  151 /* Sensitivity Level Specification */
  152 /* nothing */
  153 
  154 #define SADB_KILL_INTERVAL      600     /* six seconds */
  155 
  156 struct key_cb {
  157         int key_count;
  158         int any_count;
  159 };
  160 
  161 /* secpolicy */
  162 struct secpolicy;
  163 struct secpolicyindex;
  164 extern struct secpolicy *keydb_newsecpolicy __P((void));
  165 extern u_int32_t keydb_newspid __P((void));
  166 extern void keydb_delsecpolicy __P((struct secpolicy *));
  167 extern int keydb_setsecpolicyindex
  168         __P((struct secpolicy *, struct secpolicyindex *));
  169 /* secashead */
  170 extern struct secashead *keydb_newsecashead __P((void));
  171 extern void keydb_delsecashead __P((struct secashead *));
  172 /* secasvar */
  173 extern struct secasvar *keydb_newsecasvar __P((void));
  174 extern void keydb_delsecasvar __P((struct secasvar *));
  175 /* secreplay */
  176 extern struct secreplay *keydb_newsecreplay __P((size_t));
  177 extern void keydb_delsecreplay __P((struct secreplay *));
  178 /* secreg */
  179 extern struct secreg *keydb_newsecreg __P((void));
  180 extern void keydb_delsecreg __P((struct secreg *));
  181 
  182 #endif /* _KERNEL */
  183 
  184 #endif /* !_NETKEY_KEYDB_H_ */

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