linux/include/net/ieee80211_radiotap.h
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   1/*
   2 * Copyright (c) 2017           Intel Deutschland GmbH
   3 * Copyright (c) 2018           Intel Corporation
   4 *
   5 * Permission to use, copy, modify, and/or distribute this software for any
   6 * purpose with or without fee is hereby granted, provided that the above
   7 * copyright notice and this permission notice appear in all copies.
   8 *
   9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16 */
  17#ifndef __RADIOTAP_H
  18#define __RADIOTAP_H
  19
  20#include <linux/kernel.h>
  21#include <asm/unaligned.h>
  22
  23/**
  24 * struct ieee82011_radiotap_header - base radiotap header
  25 */
  26struct ieee80211_radiotap_header {
  27        /**
  28         * @it_version: radiotap version, always 0
  29         */
  30        uint8_t it_version;
  31
  32        /**
  33         * @it_pad: padding (or alignment)
  34         */
  35        uint8_t it_pad;
  36
  37        /**
  38         * @it_len: overall radiotap header length
  39         */
  40        __le16 it_len;
  41
  42        /**
  43         * @it_present: (first) present word
  44         */
  45        __le32 it_present;
  46} __packed;
  47
  48/* version is always 0 */
  49#define PKTHDR_RADIOTAP_VERSION 0
  50
  51/* see the radiotap website for the descriptions */
  52enum ieee80211_radiotap_presence {
  53        IEEE80211_RADIOTAP_TSFT = 0,
  54        IEEE80211_RADIOTAP_FLAGS = 1,
  55        IEEE80211_RADIOTAP_RATE = 2,
  56        IEEE80211_RADIOTAP_CHANNEL = 3,
  57        IEEE80211_RADIOTAP_FHSS = 4,
  58        IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5,
  59        IEEE80211_RADIOTAP_DBM_ANTNOISE = 6,
  60        IEEE80211_RADIOTAP_LOCK_QUALITY = 7,
  61        IEEE80211_RADIOTAP_TX_ATTENUATION = 8,
  62        IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9,
  63        IEEE80211_RADIOTAP_DBM_TX_POWER = 10,
  64        IEEE80211_RADIOTAP_ANTENNA = 11,
  65        IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12,
  66        IEEE80211_RADIOTAP_DB_ANTNOISE = 13,
  67        IEEE80211_RADIOTAP_RX_FLAGS = 14,
  68        IEEE80211_RADIOTAP_TX_FLAGS = 15,
  69        IEEE80211_RADIOTAP_RTS_RETRIES = 16,
  70        IEEE80211_RADIOTAP_DATA_RETRIES = 17,
  71        /* 18 is XChannel, but it's not defined yet */
  72        IEEE80211_RADIOTAP_MCS = 19,
  73        IEEE80211_RADIOTAP_AMPDU_STATUS = 20,
  74        IEEE80211_RADIOTAP_VHT = 21,
  75        IEEE80211_RADIOTAP_TIMESTAMP = 22,
  76        IEEE80211_RADIOTAP_HE = 23,
  77        IEEE80211_RADIOTAP_HE_MU = 24,
  78
  79        /* valid in every it_present bitmap, even vendor namespaces */
  80        IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29,
  81        IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30,
  82        IEEE80211_RADIOTAP_EXT = 31
  83};
  84
  85/* for IEEE80211_RADIOTAP_FLAGS */
  86enum ieee80211_radiotap_flags {
  87        IEEE80211_RADIOTAP_F_CFP = 0x01,
  88        IEEE80211_RADIOTAP_F_SHORTPRE = 0x02,
  89        IEEE80211_RADIOTAP_F_WEP = 0x04,
  90        IEEE80211_RADIOTAP_F_FRAG = 0x08,
  91        IEEE80211_RADIOTAP_F_FCS = 0x10,
  92        IEEE80211_RADIOTAP_F_DATAPAD = 0x20,
  93        IEEE80211_RADIOTAP_F_BADFCS = 0x40,
  94};
  95
  96/* for IEEE80211_RADIOTAP_CHANNEL */
  97enum ieee80211_radiotap_channel_flags {
  98        IEEE80211_CHAN_CCK = 0x0020,
  99        IEEE80211_CHAN_OFDM = 0x0040,
 100        IEEE80211_CHAN_2GHZ = 0x0080,
 101        IEEE80211_CHAN_5GHZ = 0x0100,
 102        IEEE80211_CHAN_DYN = 0x0400,
 103        IEEE80211_CHAN_HALF = 0x4000,
 104        IEEE80211_CHAN_QUARTER = 0x8000,
 105};
 106
 107/* for IEEE80211_RADIOTAP_RX_FLAGS */
 108enum ieee80211_radiotap_rx_flags {
 109        IEEE80211_RADIOTAP_F_RX_BADPLCP = 0x0002,
 110};
 111
 112/* for IEEE80211_RADIOTAP_TX_FLAGS */
 113enum ieee80211_radiotap_tx_flags {
 114        IEEE80211_RADIOTAP_F_TX_FAIL = 0x0001,
 115        IEEE80211_RADIOTAP_F_TX_CTS = 0x0002,
 116        IEEE80211_RADIOTAP_F_TX_RTS = 0x0004,
 117        IEEE80211_RADIOTAP_F_TX_NOACK = 0x0008,
 118};
 119
 120/* for IEEE80211_RADIOTAP_MCS "have" flags */
 121enum ieee80211_radiotap_mcs_have {
 122        IEEE80211_RADIOTAP_MCS_HAVE_BW = 0x01,
 123        IEEE80211_RADIOTAP_MCS_HAVE_MCS = 0x02,
 124        IEEE80211_RADIOTAP_MCS_HAVE_GI = 0x04,
 125        IEEE80211_RADIOTAP_MCS_HAVE_FMT = 0x08,
 126        IEEE80211_RADIOTAP_MCS_HAVE_FEC = 0x10,
 127        IEEE80211_RADIOTAP_MCS_HAVE_STBC = 0x20,
 128};
 129
 130enum ieee80211_radiotap_mcs_flags {
 131        IEEE80211_RADIOTAP_MCS_BW_MASK = 0x03,
 132        IEEE80211_RADIOTAP_MCS_BW_20 = 0,
 133        IEEE80211_RADIOTAP_MCS_BW_40 = 1,
 134        IEEE80211_RADIOTAP_MCS_BW_20L = 2,
 135        IEEE80211_RADIOTAP_MCS_BW_20U = 3,
 136
 137        IEEE80211_RADIOTAP_MCS_SGI = 0x04,
 138        IEEE80211_RADIOTAP_MCS_FMT_GF = 0x08,
 139        IEEE80211_RADIOTAP_MCS_FEC_LDPC = 0x10,
 140        IEEE80211_RADIOTAP_MCS_STBC_MASK = 0x60,
 141        IEEE80211_RADIOTAP_MCS_STBC_1 = 1,
 142        IEEE80211_RADIOTAP_MCS_STBC_2 = 2,
 143        IEEE80211_RADIOTAP_MCS_STBC_3 = 3,
 144        IEEE80211_RADIOTAP_MCS_STBC_SHIFT = 5,
 145};
 146
 147/* for IEEE80211_RADIOTAP_AMPDU_STATUS */
 148enum ieee80211_radiotap_ampdu_flags {
 149        IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN = 0x0001,
 150        IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN = 0x0002,
 151        IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN = 0x0004,
 152        IEEE80211_RADIOTAP_AMPDU_IS_LAST = 0x0008,
 153        IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR = 0x0010,
 154        IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN = 0x0020,
 155        IEEE80211_RADIOTAP_AMPDU_EOF = 0x0040,
 156        IEEE80211_RADIOTAP_AMPDU_EOF_KNOWN = 0x0080,
 157};
 158
 159/* for IEEE80211_RADIOTAP_VHT */
 160enum ieee80211_radiotap_vht_known {
 161        IEEE80211_RADIOTAP_VHT_KNOWN_STBC = 0x0001,
 162        IEEE80211_RADIOTAP_VHT_KNOWN_TXOP_PS_NA = 0x0002,
 163        IEEE80211_RADIOTAP_VHT_KNOWN_GI = 0x0004,
 164        IEEE80211_RADIOTAP_VHT_KNOWN_SGI_NSYM_DIS = 0x0008,
 165        IEEE80211_RADIOTAP_VHT_KNOWN_LDPC_EXTRA_OFDM_SYM = 0x0010,
 166        IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED = 0x0020,
 167        IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH = 0x0040,
 168        IEEE80211_RADIOTAP_VHT_KNOWN_GROUP_ID = 0x0080,
 169        IEEE80211_RADIOTAP_VHT_KNOWN_PARTIAL_AID = 0x0100,
 170};
 171
 172enum ieee80211_radiotap_vht_flags {
 173        IEEE80211_RADIOTAP_VHT_FLAG_STBC = 0x01,
 174        IEEE80211_RADIOTAP_VHT_FLAG_TXOP_PS_NA = 0x02,
 175        IEEE80211_RADIOTAP_VHT_FLAG_SGI = 0x04,
 176        IEEE80211_RADIOTAP_VHT_FLAG_SGI_NSYM_M10_9 = 0x08,
 177        IEEE80211_RADIOTAP_VHT_FLAG_LDPC_EXTRA_OFDM_SYM = 0x10,
 178        IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED = 0x20,
 179};
 180
 181enum ieee80211_radiotap_vht_coding {
 182        IEEE80211_RADIOTAP_CODING_LDPC_USER0 = 0x01,
 183        IEEE80211_RADIOTAP_CODING_LDPC_USER1 = 0x02,
 184        IEEE80211_RADIOTAP_CODING_LDPC_USER2 = 0x04,
 185        IEEE80211_RADIOTAP_CODING_LDPC_USER3 = 0x08,
 186};
 187
 188/* for IEEE80211_RADIOTAP_TIMESTAMP */
 189enum ieee80211_radiotap_timestamp_unit_spos {
 190        IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MASK = 0x000F,
 191        IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MS = 0x0000,
 192        IEEE80211_RADIOTAP_TIMESTAMP_UNIT_US = 0x0001,
 193        IEEE80211_RADIOTAP_TIMESTAMP_UNIT_NS = 0x0003,
 194        IEEE80211_RADIOTAP_TIMESTAMP_SPOS_MASK = 0x00F0,
 195        IEEE80211_RADIOTAP_TIMESTAMP_SPOS_BEGIN_MDPU = 0x0000,
 196        IEEE80211_RADIOTAP_TIMESTAMP_SPOS_PLCP_SIG_ACQ = 0x0010,
 197        IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_PPDU = 0x0020,
 198        IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_MPDU = 0x0030,
 199        IEEE80211_RADIOTAP_TIMESTAMP_SPOS_UNKNOWN = 0x00F0,
 200};
 201
 202enum ieee80211_radiotap_timestamp_flags {
 203        IEEE80211_RADIOTAP_TIMESTAMP_FLAG_64BIT = 0x00,
 204        IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT = 0x01,
 205        IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY = 0x02,
 206};
 207
 208struct ieee80211_radiotap_he {
 209        __le16 data1, data2, data3, data4, data5, data6;
 210};
 211
 212enum ieee80211_radiotap_he_bits {
 213        IEEE80211_RADIOTAP_HE_DATA1_FORMAT_MASK         = 3,
 214        IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU           = 0,
 215        IEEE80211_RADIOTAP_HE_DATA1_FORMAT_EXT_SU       = 1,
 216        IEEE80211_RADIOTAP_HE_DATA1_FORMAT_MU           = 2,
 217        IEEE80211_RADIOTAP_HE_DATA1_FORMAT_TRIG         = 3,
 218
 219        IEEE80211_RADIOTAP_HE_DATA1_BSS_COLOR_KNOWN     = 0x0004,
 220        IEEE80211_RADIOTAP_HE_DATA1_BEAM_CHANGE_KNOWN   = 0x0008,
 221        IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN         = 0x0010,
 222        IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN      = 0x0020,
 223        IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN      = 0x0040,
 224        IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN        = 0x0080,
 225        IEEE80211_RADIOTAP_HE_DATA1_LDPC_XSYMSEG_KNOWN  = 0x0100,
 226        IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN          = 0x0200,
 227        IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE_KNOWN    = 0x0400,
 228        IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE2_KNOWN   = 0x0800,
 229        IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE3_KNOWN   = 0x1000,
 230        IEEE80211_RADIOTAP_HE_DATA1_SPTL_REUSE4_KNOWN   = 0x2000,
 231        IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN   = 0x4000,
 232        IEEE80211_RADIOTAP_HE_DATA1_DOPPLER_KNOWN       = 0x8000,
 233
 234        IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN     = 0x0001,
 235        IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN            = 0x0002,
 236        IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN  = 0x0004,
 237        IEEE80211_RADIOTAP_HE_DATA2_PRE_FEC_PAD_KNOWN   = 0x0008,
 238        IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN          = 0x0010,
 239        IEEE80211_RADIOTAP_HE_DATA2_PE_DISAMBIG_KNOWN   = 0x0020,
 240        IEEE80211_RADIOTAP_HE_DATA2_TXOP_KNOWN          = 0x0040,
 241        IEEE80211_RADIOTAP_HE_DATA2_MIDAMBLE_KNOWN      = 0x0080,
 242        IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET           = 0x3f00,
 243        IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET_KNOWN     = 0x4000,
 244        IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC       = 0x8000,
 245
 246        IEEE80211_RADIOTAP_HE_DATA3_BSS_COLOR           = 0x003f,
 247        IEEE80211_RADIOTAP_HE_DATA3_BEAM_CHANGE         = 0x0040,
 248        IEEE80211_RADIOTAP_HE_DATA3_UL_DL               = 0x0080,
 249        IEEE80211_RADIOTAP_HE_DATA3_DATA_MCS            = 0x0f00,
 250        IEEE80211_RADIOTAP_HE_DATA3_DATA_DCM            = 0x1000,
 251        IEEE80211_RADIOTAP_HE_DATA3_CODING              = 0x2000,
 252        IEEE80211_RADIOTAP_HE_DATA3_LDPC_XSYMSEG        = 0x4000,
 253        IEEE80211_RADIOTAP_HE_DATA3_STBC                = 0x8000,
 254
 255        IEEE80211_RADIOTAP_HE_DATA4_SU_MU_SPTL_REUSE    = 0x000f,
 256        IEEE80211_RADIOTAP_HE_DATA4_MU_STA_ID           = 0x7ff0,
 257        IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE1      = 0x000f,
 258        IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE2      = 0x00f0,
 259        IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE3      = 0x0f00,
 260        IEEE80211_RADIOTAP_HE_DATA4_TB_SPTL_REUSE4      = 0xf000,
 261
 262        IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC    = 0x000f,
 263                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ      = 0,
 264                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ      = 1,
 265                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ      = 2,
 266                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ     = 3,
 267                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_26T        = 4,
 268                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_52T        = 5,
 269                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_106T       = 6,
 270                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_242T       = 7,
 271                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_484T       = 8,
 272                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_996T       = 9,
 273                IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_2x996T     = 10,
 274
 275        IEEE80211_RADIOTAP_HE_DATA5_GI                  = 0x0030,
 276                IEEE80211_RADIOTAP_HE_DATA5_GI_0_8                      = 0,
 277                IEEE80211_RADIOTAP_HE_DATA5_GI_1_6                      = 1,
 278                IEEE80211_RADIOTAP_HE_DATA5_GI_3_2                      = 2,
 279
 280        IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE            = 0x00c0,
 281                IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_UNKNOWN            = 0,
 282                IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_1X                 = 1,
 283                IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_2X                 = 2,
 284                IEEE80211_RADIOTAP_HE_DATA5_LTF_SIZE_4X                 = 3,
 285        IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS        = 0x0700,
 286        IEEE80211_RADIOTAP_HE_DATA5_PRE_FEC_PAD         = 0x3000,
 287        IEEE80211_RADIOTAP_HE_DATA5_TXBF                = 0x4000,
 288        IEEE80211_RADIOTAP_HE_DATA5_PE_DISAMBIG         = 0x8000,
 289
 290        IEEE80211_RADIOTAP_HE_DATA6_NSTS                = 0x000f,
 291        IEEE80211_RADIOTAP_HE_DATA6_DOPPLER             = 0x0010,
 292        IEEE80211_RADIOTAP_HE_DATA6_TXOP                = 0x7f00,
 293        IEEE80211_RADIOTAP_HE_DATA6_MIDAMBLE_PDCTY      = 0x8000,
 294};
 295
 296struct ieee80211_radiotap_he_mu {
 297        __le16 flags1, flags2;
 298        u8 ru_ch1[4];
 299        u8 ru_ch2[4];
 300};
 301
 302enum ieee80211_radiotap_he_mu_bits {
 303        IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS               = 0x000f,
 304        IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN         = 0x0010,
 305        IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM               = 0x0020,
 306        IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN         = 0x0040,
 307        IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_CTR_26T_RU_KNOWN    = 0x0080,
 308        IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_RU_KNOWN            = 0x0100,
 309        IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH2_RU_KNOWN            = 0x0200,
 310        IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU_KNOWN    = 0x1000,
 311        IEEE80211_RADIOTAP_HE_MU_FLAGS1_CH1_CTR_26T_RU          = 0x2000,
 312        IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN        = 0x4000,
 313        IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN  = 0x8000,
 314
 315        IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW        = 0x0003,
 316                IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_20MHZ  = 0x0000,
 317                IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_40MHZ  = 0x0001,
 318                IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_80MHZ  = 0x0002,
 319                IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_160MHZ = 0x0003,
 320        IEEE80211_RADIOTAP_HE_MU_FLAGS2_BW_FROM_SIG_A_BW_KNOWN  = 0x0004,
 321        IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP              = 0x0008,
 322        IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS        = 0x00f0,
 323        IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW      = 0x0300,
 324        IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN= 0x0400,
 325        IEEE80211_RADIOTAP_HE_MU_FLAGS2_CH2_CTR_26T_RU          = 0x0800,
 326};
 327
 328/**
 329 * ieee80211_get_radiotap_len - get radiotap header length
 330 */
 331static inline u16 ieee80211_get_radiotap_len(const char *data)
 332{
 333        struct ieee80211_radiotap_header *hdr = (void *)data;
 334
 335        return get_unaligned_le16(&hdr->it_len);
 336}
 337
 338#endif /* __RADIOTAP_H */
 339