1STRUCT IEEE80211_TX_(9) The basic mac80211 driver inte STRUCT IEEE80211_TX_(9)
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NAME

6       struct_ieee80211_tx_rate - rate selection/status
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SYNOPSIS

9       struct ieee80211_tx_rate {
10         s8 idx;
11         u16 count:5;
12         u16 flags:11;
13       };
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MEMBERS

16       idx
17           rate index to attempt to send with
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19       count
20           number of tries in this rate before going to the next rate
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22       flags
23           rate control flags (enum mac80211_rate_control_flags)
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DESCRIPTION

26       A value of -1 for idx indicates an invalid rate and, if used in an
27       array of retry rates, that no more rates should be tried.
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29       When used for transmit status reporting, the driver should always
30       report the rate along with the flags it used.
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32       struct ieee80211_tx_info contains an array of these structs in the
33       control information, and it will be filled by the rate control
34       algorithm according to what should be sent. For example, if this array
35       contains, in the format { <idx>, <count> } the
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INFORMATION

38       :
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40       { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 }
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42       then this means that the frame should be transmitted up to twice at
43       rate 3, up to twice at rate 2, and up to four times at rate 1 if it
44       doesn't get acknowledged. Say it gets acknowledged by the peer after
45       the fifth attempt, the status
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INFORMATION SHOULD THEN CONTAIN

48       :
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50       { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ...
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52       since it was transmitted twice at rate 3, twice at rate 2 and once at
53       rate 1 after which we received an acknowledgement.
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AUTHOR

56       Johannes Berg <johannes@sipsolutions.net>
57           Author.
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60Kernel Hackers Manual 3.10         June 2019           STRUCT IEEE80211_TX_(9)
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