NetBSD/sys/netkey/keydb.c

252 lines
5.2 KiB
C

/* $NetBSD: keydb.c,v 1.19 2009/03/18 10:22:44 cegger Exp $ */
/* $KAME: keydb.c,v 1.81 2003/09/07 05:25:20 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 1.19 2009/03/18 10:22:44 cegger 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 <sys/mbuf.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <net/pfkeyv2.h>
#include <netkey/keydb.h>
#include <netkey/key.h>
#include <netinet6/ipsec.h>
#include <net/net_osdep.h>
MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management");
/*
* secpolicy management
*/
struct secpolicy *
keydb_newsecpolicy(void)
{
struct secpolicy *p;
p = (struct secpolicy *)malloc(sizeof(*p), M_SECA, M_NOWAIT|M_ZERO);
if (!p)
return p;
TAILQ_INSERT_TAIL(&sptailq, p, tailq);
return p;
}
u_int32_t
keydb_newspid(void)
{
u_int32_t newid = 0;
static u_int32_t lastalloc = IPSEC_MANUAL_POLICYID_MAX;
struct secpolicy *sp;
newid = lastalloc + 1;
/* XXX possible infinite loop */
again:
TAILQ_FOREACH(sp, &sptailq, tailq) {
if (sp->id == newid)
break;
}
if (sp != NULL) {
if (newid + 1 < newid) /* wraparound */
newid = IPSEC_MANUAL_POLICYID_MAX + 1;
else
newid++;
goto again;
}
lastalloc = newid;
return newid;
}
void
keydb_delsecpolicy(struct secpolicy *p)
{
TAILQ_REMOVE(&sptailq, p, tailq);
if (p->spidx)
free(p->spidx, M_SECA);
#ifdef SADB_X_EXT_TAG
if (p->tag)
m_nametag_unref(p->tag);
#endif
free(p, M_SECA);
}
int
keydb_setsecpolicyindex(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;
*p->spidx = *idx;
return 0;
}
/*
* secashead management
*/
struct secashead *
keydb_newsecashead(void)
{
struct secashead *p;
int i;
p = (struct secashead *)malloc(sizeof(*p), M_SECA, M_NOWAIT|M_ZERO);
if (!p)
return p;
for (i = 0; i < sizeof(p->savtree)/sizeof(p->savtree[0]); i++)
LIST_INIT(&p->savtree[i]);
return p;
}
void
keydb_delsecashead(struct secashead *p)
{
free(p, M_SECA);
}
/*
* secasvar management (reference counted)
*/
struct secasvar *
keydb_newsecasvar(void)
{
struct secasvar *p, *q;
static u_int32_t said = 0;
p = (struct secasvar *)malloc(sizeof(*p), M_SECA, M_NOWAIT|M_ZERO);
if (!p)
return p;
again:
said++;
if (said == 0)
said++;
TAILQ_FOREACH(q, &satailq, tailq) {
if (q->id == said)
goto again;
if (TAILQ_NEXT(q, tailq)) {
if (q->id < said && said < TAILQ_NEXT(q, tailq)->id)
break;
if (q->id + 1 < TAILQ_NEXT(q, tailq)->id) {
said = q->id + 1;
break;
}
}
}
p->id = said;
if (q)
TAILQ_INSERT_AFTER(&satailq, q, p, tailq);
else
TAILQ_INSERT_TAIL(&satailq, p, tailq);
return p;
}
void
keydb_delsecasvar(struct secasvar *p)
{
TAILQ_REMOVE(&satailq, p, tailq);
free(p, M_SECA);
}
/*
* secreplay management
*/
struct secreplay *
keydb_newsecreplay(size_t wsize)
{
struct secreplay *p;
p = (struct secreplay *)malloc(sizeof(*p), M_SECA, M_NOWAIT|M_ZERO);
if (!p)
return p;
if (wsize != 0) {
p->bitmap = malloc(wsize, M_SECA, M_NOWAIT|M_ZERO);
if (!p->bitmap) {
free(p, M_SECA);
return NULL;
}
}
p->wsize = wsize;
return p;
}
void
keydb_delsecreplay(struct secreplay *p)
{
if (p->bitmap)
free(p->bitmap, M_SECA);
free(p, M_SECA);
}
/*
* secreg management
*/
struct secreg *
keydb_newsecreg(void)
{
struct secreg *p;
p = (struct secreg *)malloc(sizeof(*p), M_SECA, M_NOWAIT|M_ZERO);
return p;
}
void
keydb_delsecreg(struct secreg *p)
{
free(p, M_SECA);
}