03-17-2014
There are two catches... One, it can only alter the rate of transmission, not reception. Two, it's only precise on average.
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LEARN ABOUT CENTOS
enum_mac80211_rate_control_flags
ENUM
MAC80211_RATE_C(9) The basic mac80211 driver inte ENUM MAC80211_RATE_C(9)
NAME
enum_mac80211_rate_control_flags - per-rate flags set by the Rate Control algorithm.
SYNOPSIS
enum mac80211_rate_control_flags {
IEEE80211_TX_RC_USE_RTS_CTS,
IEEE80211_TX_RC_USE_CTS_PROTECT,
IEEE80211_TX_RC_USE_SHORT_PREAMBLE,
IEEE80211_TX_RC_MCS,
IEEE80211_TX_RC_GREEN_FIELD,
IEEE80211_TX_RC_40_MHZ_WIDTH,
IEEE80211_TX_RC_DUP_DATA,
IEEE80211_TX_RC_SHORT_GI,
IEEE80211_TX_RC_VHT_MCS,
IEEE80211_TX_RC_80_MHZ_WIDTH,
IEEE80211_TX_RC_160_MHZ_WIDTH
};
CONSTANTS
IEEE80211_TX_RC_USE_RTS_CTS
Use RTS/CTS exchange for this rate.
IEEE80211_TX_RC_USE_CTS_PROTECT
CTS-to-self protection is required. This is set if the current BSS requires ERP protection.
IEEE80211_TX_RC_USE_SHORT_PREAMBLE
Use short preamble.
IEEE80211_TX_RC_MCS
HT rate.
IEEE80211_TX_RC_GREEN_FIELD
Indicates whether this rate should be used in Greenfield mode.
IEEE80211_TX_RC_40_MHZ_WIDTH
Indicates if the Channel Width should be 40 MHz.
IEEE80211_TX_RC_DUP_DATA
The frame should be transmitted on both of the adjacent 20 MHz channels, if the current channel type is NL80211_CHAN_HT40MINUS or
NL80211_CHAN_HT40PLUS.
IEEE80211_TX_RC_SHORT_GI
Short Guard interval should be used for this rate.
IEEE80211_TX_RC_VHT_MCS
VHT MCS rate, in this case the idx field is split into a higher 4 bits (Nss) and lower 4 bits (MCS number)
IEEE80211_TX_RC_80_MHZ_WIDTH
Indicates 80 MHz transmission
IEEE80211_TX_RC_160_MHZ_WIDTH
Indicates 160 MHz transmission (80+80 isn't supported yet)
DESCRIPTION
These flags are set by the Rate control algorithm for each rate during tx, in the flags member of struct ieee80211_tx_rate.
AUTHOR
Johannes Berg <johannes@sipsolutions.net>
Author.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 ENUM MAC80211_RATE_C(9)