enum mac80211_rx_flags — receive flags
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_AMPDU_REPORT_ZEROLEN,
RX_FLAG_AMPDU_IS_ZEROLEN,
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
};
Michael MIC error was reported on this frame.
Use together with RX_FLAG_MMIC_STRIPPED.
This frame was decrypted in hardware.
the Michael MIC is stripped off this frame, verification has been done by the hardware.
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.
Set this flag if the FCS check failed on the frame.
Set this flag if the PCLP check failed on the frame.
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.
Short preamble was used for this frame
HT MCS was used and rate_idx is MCS index
HT40 (40 MHz) was used
Short guard interval was used
The signal strength value is not present. Valid only for data frames (mainly A-MPDU)
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
A-MPDU details are known, in particular the reference
number (ampdu_reference) must be populated and be a distinct number for
each A-MPDU
driver reports 0-length subframes
This is a zero-length subframe, for monitoring purposes only
last subframe is known, should be set on all subframes of a single A-MPDU
this subframe is the last subframe of the A-MPDU
A delimiter CRC error has been detected on this subframe
The delimiter CRC field is known (the CRC
is stored in the ampdu_delimiter_crc field)
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.
VHT MCS was used and rate_index is MCS index
LDPC was used
STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3
10 MHz (half channel) was used
5 MHz (quarter channel) was used
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.
This frame contains vendor-specific radiotap data in the skb->data (before the frame) as described by the struct ieee80211_vendor_radiotap.