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) 2002-2007 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  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  */
   25 
   26 #include <sys/cdefs.h>
   27 __FBSDID("$FreeBSD$");
   28 
   29 /*
   30  * IEEE 802.11 NULL crypto support.
   31  */
   32 #include <sys/param.h>
   33 #include <sys/systm.h> 
   34 #include <sys/mbuf.h>   
   35 #include <sys/module.h>
   36 
   37 #include <sys/socket.h>
   38 
   39 #include <net/if.h>
   40 #include <net/if_media.h>
   41 #include <net/ethernet.h>
   42 
   43 #include <net80211/ieee80211_var.h>
   44 
   45 static  void *none_attach(struct ieee80211com *, struct ieee80211_key *);
   46 static  void none_detach(struct ieee80211_key *);
   47 static  int none_setkey(struct ieee80211_key *);
   48 static  int none_encap(struct ieee80211_key *, struct mbuf *, uint8_t);
   49 static  int none_decap(struct ieee80211_key *, struct mbuf *, int);
   50 static  int none_enmic(struct ieee80211_key *, struct mbuf *, int);
   51 static  int none_demic(struct ieee80211_key *, struct mbuf *, int);
   52 
   53 const struct ieee80211_cipher ieee80211_cipher_none = {
   54         .ic_name        = "NONE",
   55         .ic_cipher      = IEEE80211_CIPHER_NONE,
   56         .ic_header      = 0,
   57         .ic_trailer     = 0,
   58         .ic_miclen      = 0,
   59         .ic_attach      = none_attach,
   60         .ic_detach      = none_detach,
   61         .ic_setkey      = none_setkey,
   62         .ic_encap       = none_encap,
   63         .ic_decap       = none_decap,
   64         .ic_enmic       = none_enmic,
   65         .ic_demic       = none_demic,
   66 };
   67 
   68 static void *
   69 none_attach(struct ieee80211com *ic, struct ieee80211_key *k)
   70 {
   71         return ic;              /* for diagnostics+stats */
   72 }
   73 
   74 static void
   75 none_detach(struct ieee80211_key *k)
   76 {
   77         (void) k;
   78 }
   79 
   80 static int
   81 none_setkey(struct ieee80211_key *k)
   82 {
   83         (void) k;
   84         return 1;
   85 }
   86 
   87 static int
   88 none_encap(struct ieee80211_key *k, struct mbuf *m, uint8_t keyid)
   89 {
   90         struct ieee80211com *ic = k->wk_private;
   91 #ifdef IEEE80211_DEBUG
   92         struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
   93 #endif
   94 
   95         /*
   96          * The specified key is not setup; this can
   97          * happen, at least, when changing keys.
   98          */
   99         IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
  100                 "[%s] key id %u is not set (encap)\n",
  101                 ether_sprintf(wh->i_addr1), keyid>>6);
  102         ic->ic_stats.is_tx_badcipher++;
  103         return 0;
  104 }
  105 
  106 static int
  107 none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
  108 {
  109         struct ieee80211com *ic = k->wk_private;
  110 #ifdef IEEE80211_DEBUG
  111         struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
  112         const uint8_t *ivp = (const uint8_t *)&wh[1];
  113 #endif
  114 
  115         /*
  116          * The specified key is not setup; this can
  117          * happen, at least, when changing keys.
  118          */
  119         /* XXX useful to know dst too */
  120         IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
  121                 "[%s] key id %u is not set (decap)\n",
  122                 ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6);
  123         ic->ic_stats.is_rx_badkeyid++;
  124         return 0;
  125 }
  126 
  127 static int
  128 none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
  129 {
  130         struct ieee80211com *ic = k->wk_private;
  131 
  132         ic->ic_stats.is_tx_badcipher++;
  133         return 0;
  134 }
  135 
  136 static int
  137 none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
  138 {
  139         struct ieee80211com *ic = k->wk_private;
  140 
  141         ic->ic_stats.is_rx_badkeyid++;
  142         return 0;
  143 }

Cache object: 7129c53e94a2bc3f57e0e3640c49104d


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