/*- * 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. * * $Id: ieee80211_crypto_none.c 1426 2006-02-01 20:07:11Z mrenzmann $ *//* * IEEE 802.11 NULL crypto support. */#include <linux/config.h>#include <linux/version.h>#include <linux/module.h>#include <linux/skbuff.h>#include <linux/netdevice.h>#include "if_media.h"#include <net80211/ieee80211_var.h>static void *none_attach(struct ieee80211vap *, 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 sk_buff *, u_int8_t);static int none_decap(struct ieee80211_key *, struct sk_buff *, int);static int none_enmic(struct ieee80211_key *, struct sk_buff *, int);static int none_demic(struct ieee80211_key *, struct sk_buff *, 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,};EXPORT_SYMBOL(ieee80211_cipher_none);static void *none_attach(struct ieee80211vap *vap, struct ieee80211_key *k){	return vap;		/* for diagnostics+stats */}static voidnone_detach(struct ieee80211_key *k){	(void) k;}static intnone_setkey(struct ieee80211_key *k){	(void) k;	return 1;}static intnone_encap(struct ieee80211_key *k, struct sk_buff *skb, u_int8_t keyid){	struct ieee80211vap *vap = k->wk_private;#ifdef IEEE80211_DEBUG	struct ieee80211_frame *wh = (struct ieee80211_frame *)skb->data;#endif	/*	 * The specified key is not setup; this can	 * happen, at least, when changing keys.	 */	IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr1,		"key id %u is not set (encap)", keyid>>6);	vap->iv_stats.is_tx_badcipher++;	return 0;}static intnone_decap(struct ieee80211_key *k, struct sk_buff *skb, int hdrlen){	struct ieee80211vap *vap = k->wk_private;#ifdef IEEE80211_DEBUG	struct ieee80211_frame *wh = (struct ieee80211_frame *)skb->data;	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_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,		"key id %u is not set (decap)", ivp[IEEE80211_WEP_IVLEN] >> 6);	vap->iv_stats.is_rx_badkeyid++;	return 0;}static intnone_enmic(struct ieee80211_key *k, struct sk_buff *skb, int force){	struct ieee80211vap *vap = k->wk_private;	vap->iv_stats.is_tx_badcipher++;	return 0;}static intnone_demic(struct ieee80211_key *k, struct sk_buff *skb, int hdrlen){	struct ieee80211vap *vap = k->wk_private;	vap->iv_stats.is_rx_badkeyid++;	return 0;}