FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_ratectl.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2010 Rui Paulo <rpaulo@FreeBSD.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD: releng/12.0/sys/net80211/ieee80211_ratectl.h 326272 2017-11-27 15:23:17Z pfg $
     */
    
    enum ieee80211_ratealgs {
            IEEE80211_RATECTL_AMRR          = 0,
            IEEE80211_RATECTL_RSSADAPT      = 1,
            IEEE80211_RATECTL_ONOE          = 2,
            IEEE80211_RATECTL_SAMPLE        = 3,
            IEEE80211_RATECTL_NONE          = 4,
            IEEE80211_RATECTL_MAX
    };
    
    /* used fields for tx_complete() events */
    #define IEEE80211_RATECTL_STATUS_PKTLEN         0x00000001
    #define IEEE80211_RATECTL_STATUS_FINAL_RATE     0x00000002
    #define IEEE80211_RATECTL_STATUS_SHORT_RETRY    0x00000004
    #define IEEE80211_RATECTL_STATUS_LONG_RETRY     0x00000008
    #define IEEE80211_RATECTL_STATUS_RSSI           0x00000010
    
    /* failure reason */
    enum ieee80211_ratectl_tx_fail_reason {
            IEEE80211_RATECTL_TX_SUCCESS            = 0,
            IEEE80211_RATECTL_TX_FAIL_SHORT         = 1,    /* too many RTS retries */
            IEEE80211_RATECTL_TX_FAIL_LONG          = 2,    /* too many retries */
            IEEE80211_RATECTL_TX_FAIL_EXPIRED       = 3,    /* lifetime expired */
            IEEE80211_RATECTL_TX_FAIL_UNSPECIFIED   = 4,    /* another reason */
    };
    #define IEEE80211_RATECTL_TX_FAIL_MAX   \
            (IEEE80211_RATECTL_TX_FAIL_UNSPECIFIED + 1)
    
    struct ieee80211_ratectl_tx_status {
            uint32_t        flags;          /* mark used fields */
            enum ieee80211_ratectl_tx_fail_reason status;   /* Tx status */
    
            int             pktlen;         /* frame length */
            int             final_rate;     /* transmission rate */
            uint_fast8_t    short_retries;  /* RTS/CTS retries */
            uint_fast8_t    long_retries;   /* ACK retries */
            int8_t          rssi;           /* ACK RSSI */
    
            uint8_t         spare[15];      /* for future use */
    };
    
    /* used fields for tx_update() events */
    #define IEEE80211_RATECTL_TX_STATS_NODE         0x00000001
    #define IEEE80211_RATECTL_TX_STATS_RETRIES      0x00000002
    
    struct ieee80211_ratectl_tx_stats {
            uint32_t        flags;          /* mark used fields */
    
            struct ieee80211_node *ni;      /* receiver */
            int             nframes;        /* transmitted frames */
            int             nsuccess;       /* ACKed frames */
            int             nretries;       /* number of retries */
    };
    
    struct ieee80211_ratectl {
            const char *ir_name;
            int     (*ir_attach)(const struct ieee80211vap *);
            void    (*ir_detach)(const struct ieee80211vap *);
            void    (*ir_init)(struct ieee80211vap *);
            void    (*ir_deinit)(struct ieee80211vap *);
            void    (*ir_node_init)(struct ieee80211_node *);
            void    (*ir_node_deinit)(struct ieee80211_node *);
            int     (*ir_rate)(struct ieee80211_node *, void *, uint32_t);
            void    (*ir_tx_complete)(const struct ieee80211_node *,
                                      const struct ieee80211_ratectl_tx_status *);
            void    (*ir_tx_update)(struct ieee80211vap *,
                                    struct ieee80211_ratectl_tx_stats *);
            void    (*ir_setinterval)(const struct ieee80211vap *, int);
            void    (*ir_node_stats)(struct ieee80211_node *ni, struct sbuf *s);
    };
    
   void    ieee80211_ratectl_register(int, const struct ieee80211_ratectl *);
   void    ieee80211_ratectl_unregister(int);
   void    ieee80211_ratectl_init(struct ieee80211vap *);
   void    ieee80211_ratectl_set(struct ieee80211vap *, int);
   
   MALLOC_DECLARE(M_80211_RATECTL);
   
   static __inline void
   ieee80211_ratectl_deinit(struct ieee80211vap *vap)
   {
           vap->iv_rate->ir_deinit(vap);
   }
   
   static __inline void
   ieee80211_ratectl_node_init(struct ieee80211_node *ni)
   {
           const struct ieee80211vap *vap = ni->ni_vap;
   
           vap->iv_rate->ir_node_init(ni);
   }
   
   static __inline void
   ieee80211_ratectl_node_deinit(struct ieee80211_node *ni)
   {
           const struct ieee80211vap *vap = ni->ni_vap;
   
           vap->iv_rate->ir_node_deinit(ni);
   }
   
   static int __inline
   ieee80211_ratectl_rate(struct ieee80211_node *ni, void *arg, uint32_t iarg)
   {
           const struct ieee80211vap *vap = ni->ni_vap;
   
           return vap->iv_rate->ir_rate(ni, arg, iarg);
   }
   
   static __inline void
   ieee80211_ratectl_tx_complete(const struct ieee80211_node *ni,
       const struct ieee80211_ratectl_tx_status *status)
   {
           const struct ieee80211vap *vap = ni->ni_vap;
   
           vap->iv_rate->ir_tx_complete(ni, status);
   }
   
   static __inline void
   ieee80211_ratectl_tx_update(struct ieee80211vap *vap,
       struct ieee80211_ratectl_tx_stats *stats)
   {
           if (vap->iv_rate->ir_tx_update == NULL)
                   return;
           vap->iv_rate->ir_tx_update(vap, stats);
   }
   
   static __inline void
   ieee80211_ratectl_setinterval(const struct ieee80211vap *vap, int msecs)
   {
           if (vap->iv_rate->ir_setinterval == NULL)
                   return;
           vap->iv_rate->ir_setinterval(vap, msecs);
   }
   
   static __inline void
   ieee80211_ratectl_node_stats(struct ieee80211_node *ni, struct sbuf *s)
   {
           const struct ieee80211vap *vap = ni->ni_vap;
   
           if (vap->iv_rate->ir_node_stats == NULL)
                   return;
           vap->iv_rate->ir_node_stats(ni, s);
   }

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