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 #ifdef __FreeBSD__
   34 __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_crypto_none.c,v 1.5 2005/06/10 16:11:24 sam Exp $");
   35 #endif
   36 #ifdef __NetBSD__
   37 __KERNEL_RCSID(0, "$NetBSD: ieee80211_crypto_none.c,v 1.7 2006/11/16 01:33:40 christos Exp $");
   38 #endif
   39 
   40 /*
   41  * IEEE 802.11 NULL crypto support.
   42  */
   43 #include <sys/param.h>
   44 #include <sys/systm.h> 
   45 #include <sys/mbuf.h>   
   46 
   47 #include <sys/socket.h>
   48 
   49 #include <net/if.h>
   50 #include <net/if_ether.h>
   51 #include <net/if_media.h>
   52 
   53 #include <net80211/ieee80211_var.h>
   54 
   55 static  void *none_attach(struct ieee80211com *, struct ieee80211_key *);
   56 static  void none_detach(struct ieee80211_key *);
   57 static  int none_setkey(struct ieee80211_key *);
   58 static  int none_encap(struct ieee80211_key *, struct mbuf *, u_int8_t);
   59 static  int none_decap(struct ieee80211_key *, struct mbuf *, int);
   60 static  int none_enmic(struct ieee80211_key *, struct mbuf *, int);
   61 static  int none_demic(struct ieee80211_key *, struct mbuf *, int);
   62 
   63 const struct ieee80211_cipher ieee80211_cipher_none = {
   64         .ic_name        = "NONE",
   65         .ic_cipher      = IEEE80211_CIPHER_NONE,
   66         .ic_header      = 0,
   67         .ic_trailer     = 0,
   68         .ic_miclen      = 0,
   69         .ic_attach      = none_attach,
   70         .ic_detach      = none_detach,
   71         .ic_setkey      = none_setkey,
   72         .ic_encap       = none_encap,
   73         .ic_decap       = none_decap,
   74         .ic_enmic       = none_enmic,
   75         .ic_demic       = none_demic,
   76 };
   77 
   78 static void *
   79 none_attach(struct ieee80211com *ic, struct ieee80211_key *k)
   80 {
   81         return ic;              /* for diagnostics+stats */
   82 }
   83 
   84 static void
   85 none_detach(struct ieee80211_key *k)
   86 {
   87         (void) k;
   88 }
   89 
   90 static int
   91 none_setkey(struct ieee80211_key *k)
   92 {
   93         (void) k;
   94         return 1;
   95 }
   96 
   97 static int
   98 none_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid)
   99 {
  100         struct ieee80211com *ic = k->wk_private;
  101 #ifdef IEEE80211_DEBUG
  102         struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
  103 #endif
  104 
  105         /*
  106          * The specified key is not setup; this can
  107          * happen, at least, when changing keys.
  108          */
  109         IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
  110                 "[%s] key id %u is not set (encap)\n",
  111                 ether_sprintf(wh->i_addr1), keyid>>6);
  112         ic->ic_stats.is_tx_badcipher++;
  113         return 0;
  114 }
  115 
  116 static int
  117 none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
  118 {
  119         struct ieee80211com *ic = k->wk_private;
  120 #ifdef IEEE80211_DEBUG
  121         struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
  122         const u_int8_t *ivp = (const u_int8_t *)&wh[1];
  123 #endif
  124 
  125         /*
  126          * The specified key is not setup; this can
  127          * happen, at least, when changing keys.
  128          */
  129         /* XXX useful to know dst too */
  130         IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
  131                 "[%s] key id %u is not set (decap)\n",
  132                 ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6);
  133         ic->ic_stats.is_rx_badkeyid++;
  134         return 0;
  135 }
  136 
  137 static int
  138 none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
  139 {
  140         struct ieee80211com *ic = k->wk_private;
  141 
  142         ic->ic_stats.is_tx_badcipher++;
  143         return 0;
  144 }
  145 
  146 static int
  147 none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
  148 {
  149         struct ieee80211com *ic = k->wk_private;
  150 
  151         ic->ic_stats.is_rx_badkeyid++;
  152         return 0;
  153 }

Cache object: 758501abe846f3e5be3e25d3cbd8fe30


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