sys/netproto/key/keydb.c

   1 /*      $FreeBSD: src/sys/netkey/keydb.c,v 1.1.2.1 2000/07/15 07:14:42 kris Exp $       */
   2 /*      $DragonFly: src/sys/netproto/key/keydb.c,v 1.10 2008/01/05 14:02:40 swildner Exp $      */
   3 /*      $KAME: keydb.c,v 1.64 2000/05/11 17:02:30 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 #include "opt_inet.h"
  35 #include "opt_inet6.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/types.h>
  39 #include <sys/socket.h>
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/kernel.h>
  43 #include <sys/malloc.h>
  44 #include <sys/errno.h>
  45 #include <sys/queue.h>
  46 #include <sys/thread2.h>
  47
  48 #include <net/if.h>
  49 #include <net/route.h>
  50
  51 #include <netinet/in.h>
  52
  53 #include <net/pfkeyv2.h>
  54 #include "keydb.h"
  55 #include <netinet6/ipsec.h>
  56
  57 #include <net/net_osdep.h>
  58
  59 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management");
  60
  61 static void keydb_delsecasvar (struct secasvar *);
  62
  63 /*
  64  * secpolicy management
  65  */
  66 struct secpolicy *
  67 keydb_newsecpolicy(void)
  68 {
  69         return((struct secpolicy *)kmalloc(sizeof(struct secpolicy), M_SECA,
  70                M_INTWAIT | M_NULLOK | M_ZERO));
  71 }
  72
  73 void
  74 keydb_delsecpolicy(struct secpolicy *p)
  75 {
  76
  77         kfree(p, M_SECA);
  78 }
  79
  80 /*
  81  * secashead management
  82  */
  83 struct secashead *
  84 keydb_newsecashead(void)
  85 {
  86         struct secashead *p;
  87         int i;
  88
  89         p = kmalloc(sizeof(*p), M_SECA, M_INTWAIT | M_NULLOK | M_ZERO);
  90         if (!p)
  91                 return p;
  92         for (i = 0; i < sizeof(p->savtree)/sizeof(p->savtree[0]); i++)
  93                 LIST_INIT(&p->savtree[i]);
  94         return p;
  95 }
  96
  97 void
  98 keydb_delsecashead(struct secashead *p)
  99 {
 100
 101         kfree(p, M_SECA);
 102 }
 103
 104 /*
 105  * secasvar management (reference counted)
 106  */
 107 struct secasvar *
 108 keydb_newsecasvar(void)
 109 {
 110         struct secasvar *p;
 111
 112         p = kmalloc(sizeof(*p), M_SECA, M_INTWAIT | M_NULLOK | M_ZERO);
 113         if (!p)
 114                 return p;
 115         p->refcnt = 1;
 116         return p;
 117 }
 118
 119 void
 120 keydb_refsecasvar(struct secasvar *p)
 121 {
 122         crit_enter();
 123         p->refcnt++;
 124         crit_exit();
 125 }
 126
 127 void
 128 keydb_freesecasvar(struct secasvar *p)
 129 {
 130         crit_enter();
 131         p->refcnt--;
 132         /* negative refcnt will cause panic intentionally */
 133         if (p->refcnt <= 0)
 134                 keydb_delsecasvar(p);
 135         crit_exit();
 136 }
 137
 138 static void
 139 keydb_delsecasvar(struct secasvar *p)
 140 {
 141
 142         if (p->refcnt)
 143                 panic("keydb_delsecasvar called with refcnt != 0");
 144
 145         kfree(p, M_SECA);
 146 }
 147
 148 /*
 149  * secreplay management
 150  */
 151 struct secreplay *
 152 keydb_newsecreplay(size_t wsize)
 153 {
 154         struct secreplay *p;
 155
 156         p = kmalloc(sizeof(*p), M_SECA, M_INTWAIT | M_NULLOK | M_ZERO);
 157         if (!p)
 158                 return p;
 159
 160         if (wsize != 0) {
 161                 p->bitmap = (caddr_t)kmalloc(wsize, M_SECA, M_INTWAIT | M_NULLOK | M_ZERO);
 162                 if (!p->bitmap) {
 163                         kfree(p, M_SECA);
 164                         return NULL;
 165                 }
 166         }
 167         p->wsize = wsize;
 168         return p;
 169 }
 170
 171 void
 172 keydb_delsecreplay(struct secreplay *p)
 173 {
 174
 175         if (p->bitmap)
 176                 kfree(p->bitmap, M_SECA);
 177         kfree(p, M_SECA);
 178 }
 179
 180 /*
 181  * secreg management
 182  */
 183 struct secreg *
 184 keydb_newsecreg(void)
 185 {
 186         struct secreg *p;
 187
 188         p = kmalloc(sizeof(*p), M_SECA, M_INTWAIT | M_ZERO | M_NULLOK);
 189         return p;
 190 }
 191
 192 void
 193 keydb_delsecreg(struct secreg *p)
 194 {
 195
 196         kfree(p, M_SECA);
 197 }