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  4. enum_mac80211_rx_flags(9)

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ENUM MAC80211_RX_FLA(9) The basic mac80211 driver inte ENUM MAC80211_RX_FLA(9)

NAME

enum_mac80211_rx_flags - receive flags

SYNOPSIS

enum mac80211_rx_flags {


  RX_FLAG_MMIC_ERROR,


  RX_FLAG_DECRYPTED,


  RX_FLAG_MMIC_STRIPPED,


  RX_FLAG_IV_STRIPPED,


  RX_FLAG_FAILED_FCS_CRC,


  RX_FLAG_FAILED_PLCP_CRC,


  RX_FLAG_MACTIME_START,


  RX_FLAG_SHORTPRE,


  RX_FLAG_HT,


  RX_FLAG_40MHZ,


  RX_FLAG_SHORT_GI,


  RX_FLAG_NO_SIGNAL_VAL,


  RX_FLAG_HT_GF,


  RX_FLAG_AMPDU_DETAILS,


  RX_FLAG_PN_VALIDATED,


  RX_FLAG_AMPDU_LAST_KNOWN,


  RX_FLAG_AMPDU_IS_LAST,


  RX_FLAG_AMPDU_DELIM_CRC_ERROR,


  RX_FLAG_AMPDU_DELIM_CRC_KNOWN,


  RX_FLAG_MACTIME_END,


  RX_FLAG_VHT,


  RX_FLAG_LDPC,


  RX_FLAG_STBC_MASK,


  RX_FLAG_10MHZ,


  RX_FLAG_5MHZ,


  RX_FLAG_AMSDU_MORE,


  RX_FLAG_RADIOTAP_VENDOR_DATA
};

CONSTANTS

RX_FLAG_MMIC_ERROR

Michael MIC error was reported on this frame. Use together with RX_FLAG_MMIC_STRIPPED.

RX_FLAG_DECRYPTED

This frame was decrypted in hardware.

RX_FLAG_MMIC_STRIPPED

the Michael MIC is stripped off this frame, verification has been done by the hardware.

RX_FLAG_IV_STRIPPED

The IV/ICV are stripped from this frame. If this flag is set, the stack cannot do any replay detection hence the driver or hardware will have to do that.

RX_FLAG_FAILED_FCS_CRC

Set this flag if the FCS check failed on the frame.

RX_FLAG_FAILED_PLCP_CRC

Set this flag if the PCLP check failed on the frame.

RX_FLAG_MACTIME_START

The timestamp passed in the RX status (mactime field) is valid and contains the time the first symbol of the MPDU was received. This is useful in monitor mode and for proper IBSS merging.

RX_FLAG_SHORTPRE

Short preamble was used for this frame

RX_FLAG_HT

HT MCS was used and rate_idx is MCS index

RX_FLAG_40MHZ

HT40 (40 MHz) was used

RX_FLAG_SHORT_GI

Short guard interval was used

RX_FLAG_NO_SIGNAL_VAL

The signal strength value is not present. Valid only for data frames (mainly A-MPDU)

RX_FLAG_HT_GF

This frame was received in a HT-greenfield transmission, if the driver fills this value it should add IEEE80211_RADIOTAP_MCS_HAVE_FMT to hw.radiotap_mcs_details to advertise that fact

RX_FLAG_AMPDU_DETAILS

A-MPDU details are known, in particular the reference number (ampdu_reference) must be populated and be a distinct number for each A-MPDU

RX_FLAG_PN_VALIDATED

Currently only valid for CCMP/GCMP frames, this flag indicates that the PN was verified for replay protection. Note that this flag is also currently only supported when a frame is also decrypted (ie. RX_FLAG_DECRYPTED must be set)

RX_FLAG_AMPDU_LAST_KNOWN

last subframe is known, should be set on all subframes of a single A-MPDU

RX_FLAG_AMPDU_IS_LAST

this subframe is the last subframe of the A-MPDU

RX_FLAG_AMPDU_DELIM_CRC_ERROR

A delimiter CRC error has been detected on this subframe

RX_FLAG_AMPDU_DELIM_CRC_KNOWN

The delimiter CRC field is known (the CRC is stored in the ampdu_delimiter_crc field)

RX_FLAG_MACTIME_END

The timestamp passed in the RX status (mactime field) is valid and contains the time the last symbol of the MPDU (including FCS) was received.

RX_FLAG_VHT

VHT MCS was used and rate_index is MCS index

RX_FLAG_LDPC

LDPC was used

RX_FLAG_STBC_MASK

STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3

RX_FLAG_10MHZ

10 MHz (half channel) was used

RX_FLAG_5MHZ

5 MHz (quarter channel) was used

RX_FLAG_AMSDU_MORE

Some drivers may prefer to report separate A-MSDU subframes instead of a one huge frame for performance reasons. All, but the last MSDU from an A-MSDU should have this flag set. E.g. if an A-MSDU has 3 frames, the first 2 must have the flag set, while the 3rd (last) one must not have this flag set. The flag is used to deal with retransmission/duplication recovery properly since A-MSDU subframes share the same sequence number. Reported subframes can be either regular MSDU or singly A-MSDUs. Subframes must not be interleaved with other frames.

RX_FLAG_RADIOTAP_VENDOR_DATA

This frame contains vendor-specific radiotap data in the skb->data (before the frame) as described by the struct ieee80211_vendor_radiotap.

DESCRIPTION

These flags are used with the flag member of struct ieee80211_rx_status.

AUTHOR

Johannes Berg <johannes@sipsolutions.net>

Author.

COPYRIGHT

May 2024 Kernel Hackers Manual 2.6.