NetBSD/sys/netkey/keydb.c

260 lines
5.2 KiB
C

/* $NetBSD: keydb.c,v 1.8 2002/06/12 17:56:46 itojun Exp $ */
/* $KAME: keydb.c,v 1.64 2000/05/11 17:02:30 itojun 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: keydb.c,v 1.8 2002/06/12 17:56:46 itojun Exp $");
#include "opt_inet.h"
#include "opt_ipsec.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <sys/queue.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <net/pfkeyv2.h>
#include <netkey/keydb.h>
#include <netinet6/ipsec.h>
#include <net/net_osdep.h>
extern TAILQ_HEAD(_sptailq, secpolicy) sptailq;
static void keydb_delsecasvar __P((struct secasvar *));
/*
* secpolicy management
*/
struct secpolicy *
keydb_newsecpolicy()
{
struct secpolicy *p, *np;
p = (struct secpolicy *)malloc(sizeof(*p), M_SECA, M_NOWAIT);
if (!p)
return p;
bzero(p, sizeof(*p));
if (TAILQ_EMPTY(&sptailq)) {
p->id = 1;
TAILQ_INSERT_HEAD(&sptailq, p, tailq);
return p;
} else if (TAILQ_LAST(&sptailq, _sptailq)->id < 0xffffffff) {
p->id = TAILQ_LAST(&sptailq, _sptailq)->id + 1;
TAILQ_INSERT_TAIL(&sptailq, p, tailq);
return p;
} else {
TAILQ_FOREACH(np, &sptailq, tailq) {
if (np->id + 1 != TAILQ_NEXT(np, tailq)->id) {
p->id = np->id + 1;
TAILQ_INSERT_AFTER(&sptailq, np, p, tailq);
break;
}
}
if (!np) {
free(p, M_SECA);
return NULL;
}
}
return p;
}
void
keydb_delsecpolicy(p)
struct secpolicy *p;
{
TAILQ_REMOVE(&sptailq, p, tailq);
if (p->spidx)
free(p->spidx, M_SECA);
free(p, M_SECA);
}
int
keydb_setsecpolicyindex(p, idx)
struct secpolicy *p;
struct secpolicyindex *idx;
{
if (!p->spidx)
p->spidx = (struct secpolicyindex *)malloc(sizeof(*p->spidx),
M_SECA, M_NOWAIT);
if (!p->spidx)
return ENOMEM;
memcpy(p->spidx, idx, sizeof(*p->spidx));
return 0;
}
/*
* secashead management
*/
struct secashead *
keydb_newsecashead()
{
struct secashead *p;
int i;
p = (struct secashead *)malloc(sizeof(*p), M_SECA, M_NOWAIT);
if (!p)
return p;
bzero(p, sizeof(*p));
for (i = 0; i < sizeof(p->savtree)/sizeof(p->savtree[0]); i++)
LIST_INIT(&p->savtree[i]);
return p;
}
void
keydb_delsecashead(p)
struct secashead *p;
{
free(p, M_SECA);
}
/*
* secasvar management (reference counted)
*/
struct secasvar *
keydb_newsecasvar()
{
struct secasvar *p;
p = (struct secasvar *)malloc(sizeof(*p), M_SECA, M_NOWAIT);
if (!p)
return p;
bzero(p, sizeof(*p));
p->refcnt = 1;
return p;
}
void
keydb_refsecasvar(p)
struct secasvar *p;
{
int s;
s = splsoftnet();
p->refcnt++;
splx(s);
}
void
keydb_freesecasvar(p)
struct secasvar *p;
{
int s;
s = splsoftnet();
p->refcnt--;
/* negative refcnt will cause panic intentionally */
if (p->refcnt <= 0)
keydb_delsecasvar(p);
splx(s);
}
static void
keydb_delsecasvar(p)
struct secasvar *p;
{
if (p->refcnt)
panic("keydb_delsecasvar called with refcnt != 0");
free(p, M_SECA);
}
/*
* secreplay management
*/
struct secreplay *
keydb_newsecreplay(wsize)
size_t wsize;
{
struct secreplay *p;
p = (struct secreplay *)malloc(sizeof(*p), M_SECA, M_NOWAIT);
if (!p)
return p;
bzero(p, sizeof(*p));
if (wsize != 0) {
p->bitmap = (caddr_t)malloc(wsize, M_SECA, M_NOWAIT);
if (!p->bitmap) {
free(p, M_SECA);
return NULL;
}
bzero(p->bitmap, wsize);
}
p->wsize = wsize;
return p;
}
void
keydb_delsecreplay(p)
struct secreplay *p;
{
if (p->bitmap)
free(p->bitmap, M_SECA);
free(p, M_SECA);
}
/*
* secreg management
*/
struct secreg *
keydb_newsecreg()
{
struct secreg *p;
p = (struct secreg *)malloc(sizeof(*p), M_SECA, M_NOWAIT);
if (p)
bzero(p, sizeof(*p));
return p;
}
void
keydb_delsecreg(p)
struct secreg *p;
{
free(p, M_SECA);
}