FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_crypto_none.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;
   }

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