2843bf259e
here but it includes completed 802.11g, WPA, 802.11i, 802.1x, WME/WMM, AP-side power-save, crypto plugin framework, authenticator plugin framework, and access control plugin frameowrk.
302 lines
7.5 KiB
C
302 lines
7.5 KiB
C
/*-
|
|
* Copyright (c) 2004 Sam Leffler, Errno Consulting
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* IEEE 802.11 MAC ACL support.
|
|
*
|
|
* When this module is loaded the sender address of each received
|
|
* frame is passed to the iac_check method and the module indicates
|
|
* if the frame should be accepted or rejected. If the policy is
|
|
* set to ACL_POLICY_OPEN then all frames are accepted w/o checking
|
|
* the address. Otherwise, the address is looked up in the database
|
|
* and if found the frame is either accepted (ACL_POLICY_ALLOW)
|
|
* or rejected (ACL_POLICY_DENT).
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/module.h>
|
|
#include <sys/queue.h>
|
|
|
|
#include <sys/socket.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_media.h>
|
|
#include <net/ethernet.h>
|
|
#include <net/route.h>
|
|
|
|
#include <net80211/ieee80211_var.h>
|
|
|
|
enum {
|
|
ACL_POLICY_OPEN = 0, /* open, don't check ACL's */
|
|
ACL_POLICY_ALLOW = 1, /* allow traffic from MAC */
|
|
ACL_POLICY_DENY = 2, /* deny traffic from MAC */
|
|
};
|
|
|
|
#define ACL_HASHSIZE 32
|
|
|
|
struct acl {
|
|
TAILQ_ENTRY(acl) acl_list;
|
|
LIST_ENTRY(acl) acl_hash;
|
|
u_int8_t acl_macaddr[IEEE80211_ADDR_LEN];
|
|
};
|
|
struct aclstate {
|
|
acl_lock_t as_lock;
|
|
int as_policy;
|
|
TAILQ_HEAD(, acl) as_list; /* list of all ACL's */
|
|
LIST_HEAD(, acl) as_hash[ACL_HASHSIZE];
|
|
struct ieee80211com *as_ic;
|
|
};
|
|
|
|
/* simple hash is enough for variation of macaddr */
|
|
#define ACL_HASH(addr) \
|
|
(((const u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % ACL_HASHSIZE)
|
|
|
|
MALLOC_DEFINE(M_80211_ACL, "acl", "802.11 station acl");
|
|
|
|
static int acl_free_all(struct ieee80211com *);
|
|
|
|
static int
|
|
acl_attach(struct ieee80211com *ic)
|
|
{
|
|
struct aclstate *as;
|
|
|
|
MALLOC(as, struct aclstate *, sizeof(struct aclstate),
|
|
M_DEVBUF, M_NOWAIT | M_ZERO);
|
|
if (as == NULL)
|
|
return 0;
|
|
ACL_LOCK_INIT(as, "acl");
|
|
TAILQ_INIT(&as->as_list);
|
|
as->as_policy = ACL_POLICY_OPEN;
|
|
as->as_ic = ic;
|
|
ic->ic_as = as;
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
acl_detach(struct ieee80211com *ic)
|
|
{
|
|
struct aclstate *as = ic->ic_as;
|
|
|
|
acl_free_all(ic);
|
|
ic->ic_as = NULL;
|
|
ACL_LOCK_DESTROY(as);
|
|
FREE(as, M_DEVBUF);
|
|
}
|
|
|
|
static inline struct acl *
|
|
_find_acl(struct aclstate *as, const u_int8_t *macaddr)
|
|
{
|
|
struct acl *acl;
|
|
int hash;
|
|
|
|
hash = ACL_HASH(macaddr);
|
|
LIST_FOREACH(acl, &as->as_hash[hash], acl_hash) {
|
|
if (IEEE80211_ADDR_EQ(acl->acl_macaddr, macaddr))
|
|
return acl;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
_acl_free(struct aclstate *as, struct acl *acl)
|
|
{
|
|
ACL_LOCK_ASSERT(as);
|
|
|
|
TAILQ_REMOVE(&as->as_list, acl, acl_list);
|
|
LIST_REMOVE(acl, acl_hash);
|
|
FREE(acl, M_80211_ACL);
|
|
}
|
|
|
|
static int
|
|
acl_check(struct ieee80211com *ic, const u_int8_t mac[IEEE80211_ADDR_LEN])
|
|
{
|
|
struct aclstate *as = ic->ic_as;
|
|
|
|
switch (as->as_policy) {
|
|
case ACL_POLICY_OPEN:
|
|
return 1;
|
|
case ACL_POLICY_ALLOW:
|
|
return _find_acl(as, mac) != NULL;
|
|
case ACL_POLICY_DENY:
|
|
return _find_acl(as, mac) == NULL;
|
|
}
|
|
return 0; /* should not happen */
|
|
}
|
|
|
|
static int
|
|
acl_add(struct ieee80211com *ic, const u_int8_t mac[IEEE80211_ADDR_LEN])
|
|
{
|
|
struct aclstate *as = ic->ic_as;
|
|
struct acl *acl, *new;
|
|
int hash;
|
|
|
|
MALLOC(new, struct acl *, sizeof(struct acl), M_80211_ACL, M_NOWAIT | M_ZERO);
|
|
if (new == NULL) {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
|
|
"ACL: add %s failed, no memory\n", ether_sprintf(mac));
|
|
/* XXX statistic */
|
|
return ENOMEM;
|
|
}
|
|
|
|
ACL_LOCK(as);
|
|
hash = ACL_HASH(mac);
|
|
LIST_FOREACH(acl, &as->as_hash[hash], acl_hash) {
|
|
if (IEEE80211_ADDR_EQ(acl->acl_macaddr, mac)) {
|
|
ACL_UNLOCK(as);
|
|
FREE(new, M_80211_ACL);
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
|
|
"ACL: add %s failed, already present\n",
|
|
ether_sprintf(mac));
|
|
return EEXIST;
|
|
}
|
|
}
|
|
IEEE80211_ADDR_COPY(new->acl_macaddr, mac);
|
|
TAILQ_INSERT_TAIL(&as->as_list, new, acl_list);
|
|
LIST_INSERT_HEAD(&as->as_hash[hash], new, acl_hash);
|
|
ACL_UNLOCK(as);
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
|
|
"ACL: add %s\n", ether_sprintf(mac));
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acl_remove(struct ieee80211com *ic, const u_int8_t mac[IEEE80211_ADDR_LEN])
|
|
{
|
|
struct aclstate *as = ic->ic_as;
|
|
struct acl *acl;
|
|
|
|
ACL_LOCK(as);
|
|
acl = _find_acl(as, mac);
|
|
if (acl != NULL)
|
|
_acl_free(as, acl);
|
|
ACL_UNLOCK(as);
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
|
|
"ACL: remove %s%s\n", ether_sprintf(mac),
|
|
acl == NULL ? ", not present" : "");
|
|
|
|
return (acl == NULL ? ENOENT : 0);
|
|
}
|
|
|
|
static int
|
|
acl_free_all(struct ieee80211com *ic)
|
|
{
|
|
struct aclstate *as = ic->ic_as;
|
|
struct acl *acl;
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL, "ACL: %s\n", "free all");
|
|
|
|
ACL_LOCK(as);
|
|
while ((acl = TAILQ_FIRST(&as->as_list)) != NULL)
|
|
_acl_free(as, acl);
|
|
ACL_UNLOCK(as);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acl_setpolicy(struct ieee80211com *ic, int policy)
|
|
{
|
|
struct aclstate *as = ic->ic_as;
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
|
|
"ACL: set policy to %u\n", policy);
|
|
|
|
switch (policy) {
|
|
case IEEE80211_MACCMD_POLICY_OPEN:
|
|
as->as_policy = ACL_POLICY_OPEN;
|
|
break;
|
|
case IEEE80211_MACCMD_POLICY_ALLOW:
|
|
as->as_policy = ACL_POLICY_ALLOW;
|
|
break;
|
|
case IEEE80211_MACCMD_POLICY_DENY:
|
|
as->as_policy = ACL_POLICY_DENY;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acl_getpolicy(struct ieee80211com *ic)
|
|
{
|
|
struct aclstate *as = ic->ic_as;
|
|
|
|
return as->as_policy;
|
|
}
|
|
|
|
static const struct ieee80211_aclator mac = {
|
|
.iac_name = "mac",
|
|
.iac_attach = acl_attach,
|
|
.iac_detach = acl_detach,
|
|
.iac_check = acl_check,
|
|
.iac_add = acl_add,
|
|
.iac_remove = acl_remove,
|
|
.iac_flush = acl_free_all,
|
|
.iac_setpolicy = acl_setpolicy,
|
|
.iac_getpolicy = acl_getpolicy,
|
|
};
|
|
|
|
/*
|
|
* Module glue.
|
|
*/
|
|
static int
|
|
wlan_acl_modevent(module_t mod, int type, void *unused)
|
|
{
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
if (bootverbose)
|
|
printf("wlan: <802.11 MAC ACL support>\n");
|
|
ieee80211_aclator_register(&mac);
|
|
return 0;
|
|
case MOD_UNLOAD:
|
|
ieee80211_aclator_unregister(&mac);
|
|
return 0;
|
|
}
|
|
return EINVAL;
|
|
}
|
|
|
|
static moduledata_t wlan_acl_mod = {
|
|
"wlan_acl",
|
|
wlan_acl_modevent,
|
|
0
|
|
};
|
|
DECLARE_MODULE(wlan_acl, wlan_acl_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
|
|
MODULE_VERSION(wlan_acl, 1);
|
|
MODULE_DEPEND(wlan_acl, wlan, 1, 1, 1);
|