Lines Matching +full:fixed +full:- +full:length

1 .. SPDX-License-Identifier: GPL-2.0
8 ------------------------------------
10 Radiotap headers are variable-length and extensible, you can get most of the
19 -----------------------
21 There is a fixed portion at the start which contains a u32 bitmap that defines
29    < 8-byte ieee80211_radiotap_header >
44 --------------------------
46 After the fixed part of the header, the arguments follow for each argument
50  - the arguments are all stored little-endian!
52  - the argument payload for a given argument index has a fixed size.  So
53    IEEE80211_RADIOTAP_TSFT being present always indicates an 8-byte argument is
57  - the arguments must be aligned to a boundary of the argument size using
61  - "alignment" is relative to the start of the ieee80211_radiotap_header, ie,
67  - the above point that there may be no absolute alignment for multibyte
68    entities in the fixed radiotap header or the argument region means that you
75  - The arguments for a given argument index can be a compound of multiple types
77    consisting of two u16s of total length 4.  When this happens, the padding
78    rule is applied dealing with a u16, NOT dealing with a 4-byte single entity.
82 -----------------------------
86 	0x00, 0x00, // <-- radiotap version + pad byte
87 	0x0b, 0x00, // <- radiotap header length
88 	0x04, 0x0c, 0x00, 0x00, // <-- bitmap
89 	0x6c, // <-- rate (in 500kHz units)
90 	0x0c, //<-- tx power
91 	0x01 //<-- antenna
95 -------------------------
148 	    if (ret != -ENOENT)
153 	    buflen -= iterator.max_length;