1STRUCT IEEE80211_RX_(9) The basic mac80211 driver inte STRUCT IEEE80211_RX_(9)
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NAME

6       struct_ieee80211_rx_status - receive status
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SYNOPSIS

9       struct ieee80211_rx_status {
10         u64 mactime;
11         u64 boottime_ns;
12         u32 device_timestamp;
13         u32 ampdu_reference;
14         u32 flag;
15         u16 freq;
16         u8 enc_flags;
17         u8 encoding:2;
18         u8 bw:3;
19         u8 rate_idx;
20         u8 nss;
21         u8 rx_flags;
22         u8 band;
23         u8 antenna;
24         s8 signal;
25         u8 chains;
26         s8 chain_signal[IEEE80211_MAX_CHAINS];
27         u8 ampdu_delimiter_crc;
28       };
29

MEMBERS

31       mactime
32           value in microseconds of the 64-bit Time Synchronization Function
33           (TSF) timer when the first data symbol (MPDU) arrived at the
34           hardware.
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36       boottime_ns
37           CLOCK_BOOTTIME timestamp the frame was received at, this is needed
38           only for beacons and probe responses that update the scan cache.
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40       device_timestamp
41           arbitrary timestamp for the device, mac80211 doesn't use it but can
42           store it and pass it back to the driver for synchronisation
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44       ampdu_reference
45           A-MPDU reference number, must be a different value for each A-MPDU
46           but the same for each subframe within one A-MPDU
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48       flag
49           RX_FLAG_\*
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51       freq
52           frequency the radio was tuned to when receiving this frame, in MHz
53           This field must be set for management frames, but isn't strictly
54           needed for data (other) frames - for those it only affects radiotap
55           reporting.
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57       enc_flags
58           uses bits from enum mac80211_rx_encoding_flags
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60       encoding
61           enum mac80211_rx_encoding
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63       bw
64           enum rate_info_bw
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66       rate_idx
67           index of data rate into band's supported rates or MCS index if HT
68           or VHT is used (RX_FLAG_HT/RX_FLAG_VHT)
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70       nss
71           number of streams (VHT and HE only)
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73       rx_flags
74           internal RX flags for mac80211
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76       band
77           the active band when this frame was received
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79       antenna
80           antenna used
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82       signal
83           signal strength when receiving this frame, either in dBm, in dB or
84           unspecified depending on the hardware capabilities flags
85           IEEE80211_HW_SIGNAL_*
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87       chains
88           bitmask of receive chains for which separate signal strength values
89           were filled.
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91       chain_signal[IEEE80211_MAX_CHAINS]
92           per-chain signal strength, in dBm (unlike signal, doesn't support
93           dB or unspecified units)
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95       ampdu_delimiter_crc
96           A-MPDU delimiter CRC
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DESCRIPTION

99       The low-level driver should provide this information (the subset
100       supported by hardware) to the 802.11 code with each received frame, in
101       the skb's control buffer (cb).
102

AUTHOR

104       Johannes Berg <johannes@sipsolutions.net>
105           Author.
106

108Kernel Hackers Manual 3.10         June 2019           STRUCT IEEE80211_RX_(9)
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