mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
2cc12aded0
it; instead pass the space occupied by the header down into the crypto modules (except in the demic case which needs it only when doing int in s/w) o while here fix defrag to strip the header from 2nd and later frames o teach decap code how to handle 4-address frames
150 lines
4.3 KiB
C
150 lines
4.3 KiB
C
/*-
|
|
* Copyright (c) 2002-2005 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 NULL crypto support.
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/module.h>
|
|
|
|
#include <sys/socket.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_media.h>
|
|
#include <net/ethernet.h>
|
|
|
|
#include <net80211/ieee80211_var.h>
|
|
|
|
static void *none_attach(struct ieee80211com *, struct ieee80211_key *);
|
|
static void none_detach(struct ieee80211_key *);
|
|
static int none_setkey(struct ieee80211_key *);
|
|
static int none_encap(struct ieee80211_key *, struct mbuf *, u_int8_t);
|
|
static int none_decap(struct ieee80211_key *, struct mbuf *, int);
|
|
static int none_enmic(struct ieee80211_key *, struct mbuf *, int);
|
|
static int none_demic(struct ieee80211_key *, struct mbuf *, int);
|
|
|
|
const struct ieee80211_cipher ieee80211_cipher_none = {
|
|
.ic_name = "NONE",
|
|
.ic_cipher = IEEE80211_CIPHER_NONE,
|
|
.ic_header = 0,
|
|
.ic_trailer = 0,
|
|
.ic_miclen = 0,
|
|
.ic_attach = none_attach,
|
|
.ic_detach = none_detach,
|
|
.ic_setkey = none_setkey,
|
|
.ic_encap = none_encap,
|
|
.ic_decap = none_decap,
|
|
.ic_enmic = none_enmic,
|
|
.ic_demic = none_demic,
|
|
};
|
|
|
|
static void *
|
|
none_attach(struct ieee80211com *ic, struct ieee80211_key *k)
|
|
{
|
|
return ic; /* for diagnostics+stats */
|
|
}
|
|
|
|
static void
|
|
none_detach(struct ieee80211_key *k)
|
|
{
|
|
(void) k;
|
|
}
|
|
|
|
static int
|
|
none_setkey(struct ieee80211_key *k)
|
|
{
|
|
(void) k;
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
none_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid)
|
|
{
|
|
struct ieee80211com *ic = k->wk_private;
|
|
#ifdef IEEE80211_DEBUG
|
|
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
|
|
#endif
|
|
|
|
/*
|
|
* The specified key is not setup; this can
|
|
* happen, at least, when changing keys.
|
|
*/
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
|
|
"[%s] key id %u is not set (encap)\n",
|
|
ether_sprintf(wh->i_addr1), keyid>>6);
|
|
ic->ic_stats.is_tx_badcipher++;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
|
|
{
|
|
struct ieee80211com *ic = k->wk_private;
|
|
#ifdef IEEE80211_DEBUG
|
|
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
|
|
const u_int8_t *ivp = (const u_int8_t *)&wh[1];
|
|
#endif
|
|
|
|
/*
|
|
* The specified key is not setup; this can
|
|
* happen, at least, when changing keys.
|
|
*/
|
|
/* XXX useful to know dst too */
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
|
|
"[%s] key id %u is not set (decap)\n",
|
|
ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6);
|
|
ic->ic_stats.is_rx_badkeyid++;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
|
|
{
|
|
struct ieee80211com *ic = k->wk_private;
|
|
|
|
ic->ic_stats.is_tx_badcipher++;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
|
|
{
|
|
struct ieee80211com *ic = k->wk_private;
|
|
|
|
ic->ic_stats.is_rx_badkeyid++;
|
|
return 0;
|
|
}
|