156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/*-
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* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* IEEE 802.11 NULL crypto support.
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*/
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/ethernet.h>
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#include <net80211/ieee80211_var.h>
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static void *none_attach(struct ieee80211vap *, struct ieee80211_key *);
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static void none_detach(struct ieee80211_key *);
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static int none_setkey(struct ieee80211_key *);
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static void none_setiv(struct ieee80211_key *, uint8_t *);
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static int none_encap(struct ieee80211_key *, struct mbuf *);
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static int none_decap(struct ieee80211_key *, struct mbuf *, int);
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static int none_enmic(struct ieee80211_key *, struct mbuf *, int);
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static int none_demic(struct ieee80211_key *, struct mbuf *, int);
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const struct ieee80211_cipher ieee80211_cipher_none = {
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.ic_name = "NONE",
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.ic_cipher = IEEE80211_CIPHER_NONE,
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.ic_header = 0,
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.ic_trailer = 0,
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.ic_miclen = 0,
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.ic_attach = none_attach,
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.ic_detach = none_detach,
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.ic_setkey = none_setkey,
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.ic_setiv = none_setiv,
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.ic_encap = none_encap,
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.ic_decap = none_decap,
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.ic_enmic = none_enmic,
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.ic_demic = none_demic,
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};
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static void *
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none_attach(struct ieee80211vap *vap, struct ieee80211_key *k)
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{
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return vap; /* for diagnostics+stats */
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}
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static void
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none_detach(struct ieee80211_key *k)
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{
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(void) k;
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}
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static int
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none_setkey(struct ieee80211_key *k)
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{
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(void) k;
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return 1;
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}
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static void
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none_setiv(struct ieee80211_key *k, uint8_t *ivp)
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{
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}
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static int
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none_encap(struct ieee80211_key *k, struct mbuf *m)
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{
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struct ieee80211vap *vap = k->wk_private;
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#ifdef IEEE80211_DEBUG
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struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
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#endif
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uint8_t keyid;
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keyid = ieee80211_crypto_get_keyid(vap, k);
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/*
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* The specified key is not setup; this can
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* happen, at least, when changing keys.
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*/
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IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr1,
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"key id %u is not set (encap)", keyid);
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vap->iv_stats.is_tx_badcipher++;
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return 0;
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}
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static int
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none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
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{
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struct ieee80211vap *vap = k->wk_private;
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#ifdef IEEE80211_DEBUG
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struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
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const uint8_t *ivp = (const uint8_t *)&wh[1];
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#endif
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/*
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* The specified key is not setup; this can
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* happen, at least, when changing keys.
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*/
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/* XXX useful to know dst too */
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IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
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"key id %u is not set (decap)", ivp[IEEE80211_WEP_IVLEN] >> 6);
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vap->iv_stats.is_rx_badkeyid++;
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return 0;
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}
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static int
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none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
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{
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struct ieee80211vap *vap = k->wk_private;
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vap->iv_stats.is_tx_badcipher++;
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return 0;
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}
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static int
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none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
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{
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struct ieee80211vap *vap = k->wk_private;
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vap->iv_stats.is_rx_badkeyid++;
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return 0;
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}
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