'\" t
.\"     Title: struct ieee80211_rx_status
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: The basic mac80211 driver interface
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "STRUCT IEEE80211_RX_" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "The basic mac80211 driver inte"
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.SH "NAME"
struct_ieee80211_rx_status \- receive status
.SH "SYNOPSIS"
.sp
.nf
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;
};  
.fi
.SH "MEMBERS"
.PP
mactime
.RS 4
value in microseconds of the 64\-bit Time Synchronization Function (TSF) timer when the first data symbol (MPDU) arrived at the hardware\&.
.RE
.PP
boottime_ns
.RS 4
CLOCK_BOOTTIME timestamp the frame was received at, this is needed only for beacons and probe responses that update the scan cache\&.
.RE
.PP
device_timestamp
.RS 4
arbitrary timestamp for the device, mac80211 doesn\*(Aqt use it but can store it and pass it back to the driver for synchronisation
.RE
.PP
ampdu_reference
.RS 4
A\-MPDU reference number, must be a different value for each A\-MPDU but the same for each subframe within one A\-MPDU
.RE
.PP
flag
.RS 4
\fBRX_FLAG_\fR*
.RE
.PP
freq
.RS 4
frequency the radio was tuned to when receiving this frame, in MHz This field must be set for management frames, but isn\*(Aqt strictly needed for data (other) frames \- for those it only affects radiotap reporting\&.
.RE
.PP
vht_flag
.RS 4
\fBRX_VHT_FLAG_\fR*
.RE
.PP
rate_idx
.RS 4
index of data rate into band\*(Aqs supported rates or MCS index if HT or VHT is used (\fBRX_FLAG_HT\fR/\fBRX_FLAG_VHT\fR)
.RE
.PP
vht_nss
.RS 4
number of streams (VHT only)
.RE
.PP
rx_flags
.RS 4
internal RX flags for mac80211
.RE
.PP
band
.RS 4
the active band when this frame was received
.RE
.PP
antenna
.RS 4
antenna used
.RE
.PP
signal
.RS 4
signal strength when receiving this frame, either in dBm, in dB or unspecified depending on the hardware capabilities flags
\fIIEEE80211_HW_SIGNAL_\fR*
.RE
.PP
chains
.RS 4
bitmask of receive chains for which separate signal strength values were filled\&.
.RE
.PP
chain_signal[IEEE80211_MAX_CHAINS]
.RS 4
per\-chain signal strength, in dBm (unlike
\fIsignal\fR, doesn\*(Aqt support dB or unspecified units)
.RE
.PP
ampdu_delimiter_crc
.RS 4
A\-MPDU delimiter CRC
.RE
.SH "DESCRIPTION"
.PP
.PP
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\*(Aqs control buffer (cb)\&.
.SH "AUTHOR"
.PP
\fBJohannes Berg\fR <\&johannes@sipsolutions.net\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br