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) 2002-2008 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: stable/8/sys/net80211/ieee80211_crypto_none.c 199583 2009-11-20 15:27:52Z jhb $");
   28 
   29 /*
   30  * IEEE 802.11 NULL crypto support.
   31  */
   32 #include "opt_wlan.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/kernel.h> 
   36 #include <sys/systm.h> 
   37 #include <sys/mbuf.h>   
   38 #include <sys/module.h>
   39 
   40 #include <sys/socket.h>
   41 
   42 #include <net/if.h>
   43 #include <net/if_media.h>
   44 #include <net/ethernet.h>
   45 
   46 #include <net80211/ieee80211_var.h>
   47 
   48 static  void *none_attach(struct ieee80211vap *, struct ieee80211_key *);
   49 static  void none_detach(struct ieee80211_key *);
   50 static  int none_setkey(struct ieee80211_key *);
   51 static  int none_encap(struct ieee80211_key *, struct mbuf *, uint8_t);
   52 static  int none_decap(struct ieee80211_key *, struct mbuf *, int);
   53 static  int none_enmic(struct ieee80211_key *, struct mbuf *, int);
   54 static  int none_demic(struct ieee80211_key *, struct mbuf *, int);
   55 
   56 const struct ieee80211_cipher ieee80211_cipher_none = {
   57         .ic_name        = "NONE",
   58         .ic_cipher      = IEEE80211_CIPHER_NONE,
   59         .ic_header      = 0,
   60         .ic_trailer     = 0,
   61         .ic_miclen      = 0,
   62         .ic_attach      = none_attach,
   63         .ic_detach      = none_detach,
   64         .ic_setkey      = none_setkey,
   65         .ic_encap       = none_encap,
   66         .ic_decap       = none_decap,
   67         .ic_enmic       = none_enmic,
   68         .ic_demic       = none_demic,
   69 };
   70 
   71 static void *
   72 none_attach(struct ieee80211vap *vap, struct ieee80211_key *k)
   73 {
   74         return vap;             /* for diagnostics+stats */
   75 }
   76 
   77 static void
   78 none_detach(struct ieee80211_key *k)
   79 {
   80         (void) k;
   81 }
   82 
   83 static int
   84 none_setkey(struct ieee80211_key *k)
   85 {
   86         (void) k;
   87         return 1;
   88 }
   89 
   90 static int
   91 none_encap(struct ieee80211_key *k, struct mbuf *m, uint8_t keyid)
   92 {
   93         struct ieee80211vap *vap = k->wk_private;
   94 #ifdef IEEE80211_DEBUG
   95         struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
   96 #endif
   97 
   98         /*
   99          * The specified key is not setup; this can
  100          * happen, at least, when changing keys.
  101          */
  102         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr1,
  103             "key id %u is not set (encap)", keyid>>6);
  104         vap->iv_stats.is_tx_badcipher++;
  105         return 0;
  106 }
  107 
  108 static int
  109 none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
  110 {
  111         struct ieee80211vap *vap = k->wk_private;
  112 #ifdef IEEE80211_DEBUG
  113         struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
  114         const uint8_t *ivp = (const uint8_t *)&wh[1];
  115 #endif
  116 
  117         /*
  118          * The specified key is not setup; this can
  119          * happen, at least, when changing keys.
  120          */
  121         /* XXX useful to know dst too */
  122         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
  123             "key id %u is not set (decap)", ivp[IEEE80211_WEP_IVLEN] >> 6);
  124         vap->iv_stats.is_rx_badkeyid++;
  125         return 0;
  126 }
  127 
  128 static int
  129 none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
  130 {
  131         struct ieee80211vap *vap = k->wk_private;
  132 
  133         vap->iv_stats.is_tx_badcipher++;
  134         return 0;
  135 }
  136 
  137 static int
  138 none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
  139 {
  140         struct ieee80211vap *vap = k->wk_private;
  141 
  142         vap->iv_stats.is_rx_badkeyid++;
  143         return 0;
  144 }

Cache object: 6a00a07561f0498a4b48339250a01c1f


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