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_tdma.h

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    1 /*-
    2  * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
    3  * Copyright (c) 2007-2009 Intel Corporation
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/10.2/sys/net80211/ieee80211_tdma.h 192468 2009-05-20 20:00:40Z sam $
   27  */
   28 #ifndef _NET80211_IEEE80211_TDMA_H_
   29 #define _NET80211_IEEE80211_TDMA_H_
   30 
   31 /*
   32  * TDMA-mode implementation definitions.
   33  */
   34 
   35 #define TDMA_SUBTYPE_PARAM      0x01
   36 #define TDMA_VERSION_V2         2
   37 #define TDMA_VERSION            TDMA_VERSION_V2
   38 
   39 /* NB: we only support 2 right now but protocol handles up to 8 */
   40 #define TDMA_MAXSLOTS           2       /* max slots/sta's */
   41 
   42 #define TDMA_PARAM_LEN_V2       sizeof(struct ieee80211_tdma_param)
   43 
   44 /*
   45  * TDMA information element.
   46  */
   47 struct ieee80211_tdma_param {
   48         u_int8_t        tdma_id;        /* IEEE80211_ELEMID_VENDOR */
   49         u_int8_t        tdma_len;
   50         u_int8_t        tdma_oui[3];    /* TDMA_OUI */
   51         u_int8_t        tdma_type;      /* TDMA_OUI_TYPE */
   52         u_int8_t        tdma_subtype;   /* TDMA_SUBTYPE_PARAM */
   53         u_int8_t        tdma_version;   /* spec revision */
   54         u_int8_t        tdma_slot;      /* station slot # [0..7] */
   55         u_int8_t        tdma_slotcnt;   /* bss slot count [1..8] */
   56         u_int16_t       tdma_slotlen;   /* bss slot len (100us) */
   57         u_int8_t        tdma_bintval;   /* beacon interval (superframes) */
   58         u_int8_t        tdma_inuse[1];  /* slot occupancy map */
   59         u_int8_t        tdma_pad[2];
   60         u_int8_t        tdma_tstamp[8]; /* timestamp from last beacon */
   61 } __packed;
   62 
   63 #ifdef _KERNEL
   64 /*
   65  * Implementation state.
   66  */
   67 struct ieee80211_tdma_state {
   68         u_int   tdma_slotlen;           /* bss slot length (us) */
   69         uint8_t tdma_version;           /* protocol version to use */
   70         uint8_t tdma_slotcnt;           /* bss slot count */
   71         uint8_t tdma_bintval;           /* beacon interval (slots) */
   72         uint8_t tdma_slot;              /* station slot # */
   73         uint8_t tdma_inuse[1];          /* mask of slots in use */
   74         uint8_t tdma_active[1];         /* mask of active slots */
   75         int     tdma_count;             /* active/inuse countdown */
   76         void    *tdma_peer;             /* peer station cookie */
   77         struct timeval tdma_lastprint;  /* time of last rate-limited printf */
   78         int     tdma_fails;             /* fail count for rate-limiting */
   79 
   80         /* parent method pointers */
   81         int     (*tdma_newstate)(struct ieee80211vap *, enum ieee80211_state,
   82                     int arg);
   83         void    (*tdma_recv_mgmt)(struct ieee80211_node *,
   84                     struct mbuf *, int, int, int);
   85         void    (*tdma_opdetach)(struct ieee80211vap *);
   86 };
   87  
   88 #define TDMA_UPDATE_SLOT        0x0001  /* tdma_slot changed */
   89 #define TDMA_UPDATE_SLOTCNT     0x0002  /* tdma_slotcnt changed */
   90 #define TDMA_UPDATE_SLOTLEN     0x0004  /* tdma_slotlen changed */
   91 #define TDMA_UPDATE_BINTVAL     0x0008  /* tdma_bintval changed */
   92 
   93 void    ieee80211_tdma_vattach(struct ieee80211vap *);
   94 
   95 int     ieee80211_tdma_getslot(struct ieee80211vap *vap);
   96 void    ieee80211_parse_tdma(struct ieee80211_node *ni, const uint8_t *ie);
   97 uint8_t *ieee80211_add_tdma(uint8_t *frm, struct ieee80211vap *vap);
   98 struct ieee80211_beacon_offsets;
   99 void    ieee80211_tdma_update_beacon(struct ieee80211vap *vap,
  100             struct ieee80211_beacon_offsets *bo);
  101 #endif /* _KERNEL */
  102 #endif /* !_NET80211_IEEE80211_TDMA_H_ */

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