The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_crypto_none.c

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    1 /*-
    2  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission.
   15  *
   16  * Alternatively, this software may be distributed under the terms of the
   17  * GNU General Public License ("GPL") version 2 as published by the Free
   18  * Software Foundation.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/6.4/sys/net80211/ieee80211_crypto_none.c 147252 2005-06-10 16:11:24Z sam $");
   34 
   35 /*
   36  * IEEE 802.11 NULL crypto support.
   37  */
   38 #include <sys/param.h>
   39 #include <sys/systm.h> 
   40 #include <sys/mbuf.h>   
   41 #include <sys/module.h>
   42 
   43 #include <sys/socket.h>
   44 
   45 #include <net/if.h>
   46 #include <net/if_media.h>
   47 #include <net/ethernet.h>
   48 
   49 #include <net80211/ieee80211_var.h>
   50 
   51 static  void *none_attach(struct ieee80211com *, struct ieee80211_key *);
   52 static  void none_detach(struct ieee80211_key *);
   53 static  int none_setkey(struct ieee80211_key *);
   54 static  int none_encap(struct ieee80211_key *, struct mbuf *, u_int8_t);
   55 static  int none_decap(struct ieee80211_key *, struct mbuf *, int);
   56 static  int none_enmic(struct ieee80211_key *, struct mbuf *, int);
   57 static  int none_demic(struct ieee80211_key *, struct mbuf *, int);
   58 
   59 const struct ieee80211_cipher ieee80211_cipher_none = {
   60         .ic_name        = "NONE",
   61         .ic_cipher      = IEEE80211_CIPHER_NONE,
   62         .ic_header      = 0,
   63         .ic_trailer     = 0,
   64         .ic_miclen      = 0,
   65         .ic_attach      = none_attach,
   66         .ic_detach      = none_detach,
   67         .ic_setkey      = none_setkey,
   68         .ic_encap       = none_encap,
   69         .ic_decap       = none_decap,
   70         .ic_enmic       = none_enmic,
   71         .ic_demic       = none_demic,
   72 };
   73 
   74 static void *
   75 none_attach(struct ieee80211com *ic, struct ieee80211_key *k)
   76 {
   77         return ic;              /* for diagnostics+stats */
   78 }
   79 
   80 static void
   81 none_detach(struct ieee80211_key *k)
   82 {
   83         (void) k;
   84 }
   85 
   86 static int
   87 none_setkey(struct ieee80211_key *k)
   88 {
   89         (void) k;
   90         return 1;
   91 }
   92 
   93 static int
   94 none_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid)
   95 {
   96         struct ieee80211com *ic = k->wk_private;
   97 #ifdef IEEE80211_DEBUG
   98         struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
   99 #endif
  100 
  101         /*
  102          * The specified key is not setup; this can
  103          * happen, at least, when changing keys.
  104          */
  105         IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
  106                 "[%s] key id %u is not set (encap)\n",
  107                 ether_sprintf(wh->i_addr1), keyid>>6);
  108         ic->ic_stats.is_tx_badcipher++;
  109         return 0;
  110 }
  111 
  112 static int
  113 none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
  114 {
  115         struct ieee80211com *ic = k->wk_private;
  116 #ifdef IEEE80211_DEBUG
  117         struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
  118         const u_int8_t *ivp = (const u_int8_t *)&wh[1];
  119 #endif
  120 
  121         /*
  122          * The specified key is not setup; this can
  123          * happen, at least, when changing keys.
  124          */
  125         /* XXX useful to know dst too */
  126         IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
  127                 "[%s] key id %u is not set (decap)\n",
  128                 ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6);
  129         ic->ic_stats.is_rx_badkeyid++;
  130         return 0;
  131 }
  132 
  133 static int
  134 none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
  135 {
  136         struct ieee80211com *ic = k->wk_private;
  137 
  138         ic->ic_stats.is_tx_badcipher++;
  139         return 0;
  140 }
  141 
  142 static int
  143 none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
  144 {
  145         struct ieee80211com *ic = k->wk_private;
  146 
  147         ic->ic_stats.is_rx_badkeyid++;
  148         return 0;
  149 }

Cache object: e9550105fd5daefa5026f35d5582b0e0


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