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_dfs.h

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    1 /*-
    2  * Copyright (c) 2007-2008 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  * $FreeBSD$
   26  */
   27 #ifndef _NET80211_IEEE80211_DFS_H_
   28 #define _NET80211_IEEE80211_DFS_H_
   29 
   30 /*
   31  * 802.11h/DFS definitions.
   32  */
   33 
   34 typedef enum {
   35         DFS_DBG_NONE            = 0,
   36         DFS_DBG_NONOL           = 1,
   37         DFS_DBG_NOCSANOL        = 2
   38 } dfs_debug_t;
   39 
   40 struct ieee80211_dfs_state {
   41         int             nol_event[IEEE80211_CHAN_MAX];
   42         struct callout  nol_timer;              /* NOL list processing */
   43         struct callout  cac_timer;              /* CAC timer */
   44         struct timeval  lastevent;              /* time of last radar event */
   45         int             cureps;                 /* current events/second */
   46         const struct ieee80211_channel *lastchan;/* chan w/ last radar event */
   47         struct ieee80211_channel *newchan;      /* chan selected next */
   48 };
   49 
   50 void    ieee80211_dfs_attach(struct ieee80211com *);
   51 void    ieee80211_dfs_detach(struct ieee80211com *);
   52 
   53 void    ieee80211_dfs_reset(struct ieee80211com *);
   54 
   55 void    ieee80211_dfs_cac_start(struct ieee80211vap *);
   56 void    ieee80211_dfs_cac_stop(struct ieee80211vap *);
   57 void    ieee80211_dfs_cac_clear(struct ieee80211com *,
   58                 const struct ieee80211_channel *);
   59 
   60 void    ieee80211_dfs_notify_radar(struct ieee80211com *,
   61                 struct ieee80211_channel *);
   62 struct ieee80211_channel *ieee80211_dfs_pickchannel(struct ieee80211com *);
   63 #endif /* _NET80211_IEEE80211_DFS_H_ */

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