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STRUCT IEEE80211_RX_(9) The basic mac80211 driver inte STRUCT IEEE80211_RX_(9)

NAME

struct_ieee80211_rx_status - receive status

SYNOPSIS

struct ieee80211_rx_status {
  u64 mactime;
  u64 boottime_ns;
  u32 device_timestamp;
  u32 ampdu_reference;
  u64 flag;
  u16 freq;
  u8 vht_flag;
  u8 rate_idx;
  u8 vht_nss;
  u8 rx_flags;
  u8 band;
  u8 antenna;
  s8 signal;
  u8 chains;
  s8 chain_signal[IEEE80211_MAX_CHAINS];
  u8 ampdu_delimiter_crc;
};

MEMBERS

mactime
value in microseconds of the 64-bit Time Synchronization Function (TSF) timer when the first data symbol (MPDU) arrived at the hardware.
boottime_ns
CLOCK_BOOTTIME timestamp the frame was received at, this is needed only for beacons and probe responses that update the scan cache.
device_timestamp
arbitrary timestamp for the device, mac80211 doesn't use it but can store it and pass it back to the driver for synchronisation
ampdu_reference
A-MPDU reference number, must be a different value for each A-MPDU but the same for each subframe within one A-MPDU
flag
RX_FLAG_*
freq
frequency the radio was tuned to when receiving this frame, in MHz This field must be set for management frames, but isn't strictly needed for data (other) frames - for those it only affects radiotap reporting.
vht_flag
RX_VHT_FLAG_*
rate_idx
index of data rate into band's supported rates or MCS index if HT or VHT is used ( RX_FLAG_HT/RX_FLAG_VHT)
vht_nss
number of streams (VHT only)
rx_flags
internal RX flags for mac80211
band
the active band when this frame was received
antenna
antenna used
signal
signal strength when receiving this frame, either in dBm, in dB or unspecified depending on the hardware capabilities flags IEEE80211_HW_SIGNAL_*
chains
bitmask of receive chains for which separate signal strength values were filled.
chain_signal[IEEE80211_MAX_CHAINS]
per-chain signal strength, in dBm (unlike signal, doesn't support dB or unspecified units)
ampdu_delimiter_crc
A-MPDU delimiter CRC

DESCRIPTION

The low-level driver should provide this information (the subset supported by hardware) to the 802.11 code with each received frame, in the skb's control buffer (cb).

AUTHOR

Johannes Berg <johannes@sipsolutions.net>
Author.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.