STRUCT IEEE80211_TX_(9)           The basic mac80211 driver inte          STRUCT IEEE80211_TX_(9)



NAME
       struct_ieee80211_tx_rate - rate selection/status

SYNOPSIS
       struct ieee80211_tx_rate {
         s8 idx;
         u16 count:5;
         u16 flags:11;
       };

MEMBERS
       idx
           rate index to attempt to send with

       count
           number of tries in this rate before going to the next rate

       flags
           rate control flags (enum mac80211_rate_control_flags)

DESCRIPTION
       A value of -1 for idx indicates an invalid rate and, if used in an array of retry rates,
       that no more rates should be tried.

       When used for transmit status reporting, the driver should always report the rate along
       with the flags it used.

       struct ieee80211_tx_info contains an array of these structs in the control information,
       and it will be filled by the rate control algorithm according to what should be sent. For
       example, if this array contains, in the format { <idx>, <count> } the information { 3, 2
       }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } then this means that the frame should be
       transmitted up to twice at rate 3, up to twice at rate 2, and up to four times at rate 1
       if it doesn't get acknowledged. Say it gets acknowledged by the peer after the fifth
       attempt, the status information should then contain { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0
       } ... since it was transmitted twice at rate 3, twice at rate 2 and once at rate 1 after
       which we received an acknowledgement.

AUTHOR
       Johannes Berg <johannes AT sipsolutions.net>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   STRUCT IEEE80211_TX_(9)