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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_ht.h

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    1 /*-
    2  * Copyright (c) 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  * $FreeBSD$
   26  */
   27 #ifndef _NET80211_IEEE80211_HT_H_
   28 #define _NET80211_IEEE80211_HT_H_
   29 
   30 /*
   31  * 802.11n protocol implementation definitions.
   32  */
   33 
   34 #define IEEE80211_AGGR_BAWMAX   64      /* max block ack window size */
   35 /* threshold for aging overlapping non-HT bss */
   36 #define IEEE80211_NONHT_PRESENT_AGE     msecs_to_ticks(60*1000)
   37 
   38 typedef uint16_t ieee80211_seq;
   39 
   40 struct ieee80211_tx_ampdu {
   41         u_short         txa_flags;
   42 #define IEEE80211_AGGR_IMMEDIATE        0x0001  /* BA policy */
   43 #define IEEE80211_AGGR_XCHGPEND         0x0002  /* ADDBA response pending */
   44 #define IEEE80211_AGGR_RUNNING          0x0004  /* ADDBA response received */
   45 #define IEEE80211_AGGR_SETUP            0x0008  /* deferred state setup */
   46 #define IEEE80211_AGGR_NAK              0x0010  /* peer NAK'd ADDBA request */
   47         uint8_t         txa_ac;
   48         uint8_t         txa_token;      /* dialog token */
   49         int             txa_qbytes;     /* data queued (bytes) */
   50         short           txa_qframes;    /* data queued (frames) */
   51         ieee80211_seq   txa_seqstart;
   52         ieee80211_seq   txa_start;
   53         uint16_t        txa_wnd;        /* BA window size */
   54         uint8_t         txa_attempts;   /* # setup attempts */
   55         int             txa_lastrequest;/* time of last ADDBA request */
   56         struct ifqueue  txa_q;          /* packet queue */
   57         struct callout  txa_timer;
   58         void            *txa_private;   /* driver-private storage */
   59 };
   60 
   61 /* return non-zero if AMPDU tx for the TID is running */
   62 #define IEEE80211_AMPDU_RUNNING(tap) \
   63         (((tap)->txa_flags & IEEE80211_AGGR_RUNNING) != 0)
   64 
   65 /* return non-zero if AMPDU tx for the TID is running or started */
   66 #define IEEE80211_AMPDU_REQUESTED(tap) \
   67         (((tap)->txa_flags & \
   68          (IEEE80211_AGGR_RUNNING|IEEE80211_AGGR_XCHGPEND|IEEE80211_AGGR_NAK)) != 0)
   69 
   70 struct ieee80211_rx_ampdu {
   71         int             rxa_flags;
   72         int             rxa_qbytes;     /* data queued (bytes) */
   73         short           rxa_qframes;    /* data queued (frames) */
   74         ieee80211_seq   rxa_seqstart;
   75         ieee80211_seq   rxa_start;      /* start of current BA window */
   76         uint16_t        rxa_wnd;        /* BA window size */
   77         int             rxa_age;        /* age of oldest frame in window */
   78         int             rxa_nframes;    /* frames since ADDBA */
   79         struct mbuf *rxa_m[IEEE80211_AGGR_BAWMAX];
   80 };
   81 
   82 void    ieee80211_ht_attach(struct ieee80211com *);
   83 void    ieee80211_ht_detach(struct ieee80211com *);
   84 
   85 void    ieee80211_ht_announce(struct ieee80211com *);
   86 
   87 extern const int ieee80211_htrates[16];
   88 const struct ieee80211_htrateset *ieee80211_get_suphtrates(
   89                 struct ieee80211com *, const struct ieee80211_channel *);
   90 
   91 struct ieee80211_node;
   92 int     ieee80211_setup_htrates(struct ieee80211_node *,
   93                 const uint8_t *htcap, int flags);
   94 void    ieee80211_setup_basic_htrates(struct ieee80211_node *,
   95                 const uint8_t *htinfo);
   96 struct mbuf *ieee80211_decap_amsdu(struct ieee80211_node *, struct mbuf *);
   97 int     ieee80211_ampdu_reorder(struct ieee80211_node *, struct mbuf *);
   98 void    ieee80211_recv_bar(struct ieee80211_node *, struct mbuf *);
   99 void    ieee80211_ht_node_init(struct ieee80211_node *, const uint8_t *);
  100 void    ieee80211_ht_node_cleanup(struct ieee80211_node *);
  101 struct ieee80211_channel *ieee80211_ht_adjust_channel(struct ieee80211com *,
  102                 struct ieee80211_channel *, int);
  103 void    ieee80211_ht_wds_init(struct ieee80211_node *);
  104 void    ieee80211_ht_node_join(struct ieee80211_node *);
  105 void    ieee80211_ht_node_leave(struct ieee80211_node *);
  106 void    ieee80211_htinfo_update(struct ieee80211com *, int protmode);
  107 void    ieee80211_ht_timeout(struct ieee80211com *);
  108 void    ieee80211_parse_htcap(struct ieee80211_node *, const uint8_t *);
  109 void    ieee80211_parse_htinfo(struct ieee80211_node *, const uint8_t *);
  110 void    ieee80211_recv_action(struct ieee80211_node *,
  111                 const uint8_t *, const uint8_t *);
  112 int     ieee80211_ampdu_request(struct ieee80211_node *,
  113                 struct ieee80211_tx_ampdu *);
  114 void    ieee80211_ampdu_stop(struct ieee80211_node *,
  115                 struct ieee80211_tx_ampdu *);
  116 int     ieee80211_send_bar(struct ieee80211_node *,
  117                 const struct ieee80211_tx_ampdu *);
  118 int     ieee80211_send_action(struct ieee80211_node *,
  119                 int, int, uint16_t [4]);
  120 uint8_t *ieee80211_add_htcap(uint8_t *, struct ieee80211_node *);
  121 uint8_t *ieee80211_add_htcap_vendor(uint8_t *, struct ieee80211_node *);
  122 uint8_t *ieee80211_add_htinfo(uint8_t *, struct ieee80211_node *);
  123 uint8_t *ieee80211_add_htinfo_vendor(uint8_t *, struct ieee80211_node *);
  124 struct ieee80211_beacon_offsets;
  125 void    ieee80211_ht_update_beacon(struct ieee80211com *,
  126                 struct ieee80211_beacon_offsets *);
  127 #endif /* _NET80211_IEEE80211_HT_H_ */

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