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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 | /* * Copyright (c) 2003, 2004 David Young. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of David Young may not be used to endorse or promote * products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. */ /* * Modifications to fit into the linux IEEE 802.11 stack, * Mike Kershaw (dragorn@kismetwireless.net) */ #ifndef IEEE80211RADIOTAP_H #define IEEE80211RADIOTAP_H #include <linux/if_ether.h> #include <linux/kernel.h> #include <asm/unaligned.h> /* Base version of the radiotap packet header data */ #define PKTHDR_RADIOTAP_VERSION 0 /* A generic radio capture format is desirable. There is one for * Linux, but it is neither rigidly defined (there were not even * units given for some fields) nor easily extensible. * * I suggest the following extensible radio capture format. It is * based on a bitmap indicating which fields are present. * * I am trying to describe precisely what the application programmer * should expect in the following, and for that reason I tell the * units and origin of each measurement (where it applies), or else I * use sufficiently weaselly language ("is a monotonically nondecreasing * function of...") that I cannot set false expectations for lawyerly * readers. */ /* * The radio capture header precedes the 802.11 header. * All data in the header is little endian on all platforms. */ struct ieee80211_radiotap_header { u8 it_version; /* Version 0. Only increases * for drastic changes, * introduction of compatible * new fields does not count. */ u8 it_pad; __le16 it_len; /* length of the whole * header in bytes, including * it_version, it_pad, * it_len, and data fields. */ __le32 it_present; /* A bitmap telling which * fields are present. Set bit 31 * (0x80000000) to extend the * bitmap by another 32 bits. * Additional extensions are made * by setting bit 31. */ } __packed; /* Name Data type Units * ---- --------- ----- * * IEEE80211_RADIOTAP_TSFT __le64 microseconds * * Value in microseconds of the MAC's 64-bit 802.11 Time * Synchronization Function timer when the first bit of the * MPDU arrived at the MAC. For received frames, only. * * IEEE80211_RADIOTAP_CHANNEL 2 x __le16 MHz, bitmap * * Tx/Rx frequency in MHz, followed by flags (see below). * * IEEE80211_RADIOTAP_FHSS __le16 see below * * For frequency-hopping radios, the hop set (first byte) * and pattern (second byte). * * IEEE80211_RADIOTAP_RATE u8 500kb/s * * Tx/Rx data rate * * IEEE80211_RADIOTAP_DBM_ANTSIGNAL s8 decibels from * one milliwatt (dBm) * * RF signal power at the antenna, decibel difference from * one milliwatt. * * IEEE80211_RADIOTAP_DBM_ANTNOISE s8 decibels from * one milliwatt (dBm) * * RF noise power at the antenna, decibel difference from one * milliwatt. * * IEEE80211_RADIOTAP_DB_ANTSIGNAL u8 decibel (dB) * * RF signal power at the antenna, decibel difference from an * arbitrary, fixed reference. * * IEEE80211_RADIOTAP_DB_ANTNOISE u8 decibel (dB) * * RF noise power at the antenna, decibel difference from an * arbitrary, fixed reference point. * * IEEE80211_RADIOTAP_LOCK_QUALITY __le16 unitless * * Quality of Barker code lock. Unitless. Monotonically * nondecreasing with "better" lock strength. Called "Signal * Quality" in datasheets. (Is there a standard way to measure * this?) * * IEEE80211_RADIOTAP_TX_ATTENUATION __le16 unitless * * Transmit power expressed as unitless distance from max * power set at factory calibration. 0 is max power. * Monotonically nondecreasing with lower power levels. * * IEEE80211_RADIOTAP_DB_TX_ATTENUATION __le16 decibels (dB) * * Transmit power expressed as decibel distance from max power * set at factory calibration. 0 is max power. Monotonically * nondecreasing with lower power levels. * * IEEE80211_RADIOTAP_DBM_TX_POWER s8 decibels from * one milliwatt (dBm) * * Transmit power expressed as dBm (decibels from a 1 milliwatt * reference). This is the absolute power level measured at * the antenna port. * * IEEE80211_RADIOTAP_FLAGS u8 bitmap * * Properties of transmitted and received frames. See flags * defined below. * * IEEE80211_RADIOTAP_ANTENNA u8 antenna index * * Unitless indication of the Rx/Tx antenna for this packet. * The first antenna is antenna 0. * * IEEE80211_RADIOTAP_RX_FLAGS __le16 bitmap * * Properties of received frames. See flags defined below. * * IEEE80211_RADIOTAP_TX_FLAGS __le16 bitmap * * Properties of transmitted frames. See flags defined below. * * IEEE80211_RADIOTAP_RTS_RETRIES u8 data * * Number of rts retries a transmitted frame used. * * IEEE80211_RADIOTAP_DATA_RETRIES u8 data * * Number of unicast retries a transmitted frame used. * * IEEE80211_RADIOTAP_MCS u8, u8, u8 unitless * * Contains a bitmap of known fields/flags, the flags, and * the MCS index. * * IEEE80211_RADIOTAP_AMPDU_STATUS u32, u16, u8, u8 unitless * * Contains the AMPDU information for the subframe. * * IEEE80211_RADIOTAP_VHT u16, u8, u8, u8[4], u8, u8, u16 * * Contains VHT information about this frame. * * IEEE80211_RADIOTAP_TIMESTAMP u64, u16, u8, u8 variable * * Contains timestamp information for this frame. */ enum ieee80211_radiotap_type { IEEE80211_RADIOTAP_TSFT = 0, IEEE80211_RADIOTAP_FLAGS = 1, IEEE80211_RADIOTAP_RATE = 2, IEEE80211_RADIOTAP_CHANNEL = 3, IEEE80211_RADIOTAP_FHSS = 4, IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5, IEEE80211_RADIOTAP_DBM_ANTNOISE = 6, IEEE80211_RADIOTAP_LOCK_QUALITY = 7, IEEE80211_RADIOTAP_TX_ATTENUATION = 8, IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9, IEEE80211_RADIOTAP_DBM_TX_POWER = 10, IEEE80211_RADIOTAP_ANTENNA = 11, IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12, IEEE80211_RADIOTAP_DB_ANTNOISE = 13, IEEE80211_RADIOTAP_RX_FLAGS = 14, IEEE80211_RADIOTAP_TX_FLAGS = 15, IEEE80211_RADIOTAP_RTS_RETRIES = 16, IEEE80211_RADIOTAP_DATA_RETRIES = 17, IEEE80211_RADIOTAP_MCS = 19, IEEE80211_RADIOTAP_AMPDU_STATUS = 20, IEEE80211_RADIOTAP_VHT = 21, IEEE80211_RADIOTAP_TIMESTAMP = 22, /* valid in every it_present bitmap, even vendor namespaces */ IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29, IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30, IEEE80211_RADIOTAP_EXT = 31 }; /* Channel flags. */ #define IEEE80211_CHAN_TURBO 0x0010 /* Turbo channel */ #define IEEE80211_CHAN_CCK 0x0020 /* CCK channel */ #define IEEE80211_CHAN_OFDM 0x0040 /* OFDM channel */ #define IEEE80211_CHAN_2GHZ 0x0080 /* 2 GHz spectrum channel. */ #define IEEE80211_CHAN_5GHZ 0x0100 /* 5 GHz spectrum channel */ #define IEEE80211_CHAN_PASSIVE 0x0200 /* Only passive scan allowed */ #define IEEE80211_CHAN_DYN 0x0400 /* Dynamic CCK-OFDM channel */ #define IEEE80211_CHAN_GFSK 0x0800 /* GFSK channel (FHSS PHY) */ #define IEEE80211_CHAN_GSM 0x1000 /* GSM (900 MHz) */ #define IEEE80211_CHAN_STURBO 0x2000 /* Static Turbo */ #define IEEE80211_CHAN_HALF 0x4000 /* Half channel (10 MHz wide) */ #define IEEE80211_CHAN_QUARTER 0x8000 /* Quarter channel (5 MHz wide) */ /* For IEEE80211_RADIOTAP_FLAGS */ #define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received * during CFP */ #define IEEE80211_RADIOTAP_F_SHORTPRE 0x02 /* sent/received * with short * preamble */ #define IEEE80211_RADIOTAP_F_WEP 0x04 /* sent/received * with WEP encryption */ #define IEEE80211_RADIOTAP_F_FRAG 0x08 /* sent/received * with fragmentation */ #define IEEE80211_RADIOTAP_F_FCS 0x10 /* frame includes FCS */ #define IEEE80211_RADIOTAP_F_DATAPAD 0x20 /* frame has padding between * 802.11 header and payload * (to 32-bit boundary) */ #define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* bad FCS */ /* For IEEE80211_RADIOTAP_RX_FLAGS */ #define IEEE80211_RADIOTAP_F_RX_BADPLCP 0x0002 /* frame has bad PLCP */ /* For IEEE80211_RADIOTAP_TX_FLAGS */ #define IEEE80211_RADIOTAP_F_TX_FAIL 0x0001 /* failed due to excessive * retries */ #define IEEE80211_RADIOTAP_F_TX_CTS 0x0002 /* used cts 'protection' */ #define IEEE80211_RADIOTAP_F_TX_RTS 0x0004 /* used rts/cts handshake */ #define IEEE80211_RADIOTAP_F_TX_NOACK 0x0008 /* don't expect an ack */ /* For IEEE80211_RADIOTAP_MCS */ #define IEEE80211_RADIOTAP_MCS_HAVE_BW 0x01 #define IEEE80211_RADIOTAP_MCS_HAVE_MCS 0x02 #define IEEE80211_RADIOTAP_MCS_HAVE_GI 0x04 #define IEEE80211_RADIOTAP_MCS_HAVE_FMT 0x08 #define IEEE80211_RADIOTAP_MCS_HAVE_FEC 0x10 #define IEEE80211_RADIOTAP_MCS_HAVE_STBC 0x20 #define IEEE80211_RADIOTAP_MCS_BW_MASK 0x03 #define IEEE80211_RADIOTAP_MCS_BW_20 0 #define IEEE80211_RADIOTAP_MCS_BW_40 1 #define IEEE80211_RADIOTAP_MCS_BW_20L 2 #define IEEE80211_RADIOTAP_MCS_BW_20U 3 #define IEEE80211_RADIOTAP_MCS_SGI 0x04 #define IEEE80211_RADIOTAP_MCS_FMT_GF 0x08 #define IEEE80211_RADIOTAP_MCS_FEC_LDPC 0x10 #define IEEE80211_RADIOTAP_MCS_STBC_MASK 0x60 #define IEEE80211_RADIOTAP_MCS_STBC_1 1 #define IEEE80211_RADIOTAP_MCS_STBC_2 2 #define IEEE80211_RADIOTAP_MCS_STBC_3 3 #define IEEE80211_RADIOTAP_MCS_STBC_SHIFT 5 /* For IEEE80211_RADIOTAP_AMPDU_STATUS */ #define IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN 0x0001 #define IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN 0x0002 #define IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN 0x0004 #define IEEE80211_RADIOTAP_AMPDU_IS_LAST 0x0008 #define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR 0x0010 #define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN 0x0020 /* For IEEE80211_RADIOTAP_VHT */ #define IEEE80211_RADIOTAP_VHT_KNOWN_STBC 0x0001 #define IEEE80211_RADIOTAP_VHT_KNOWN_TXOP_PS_NA 0x0002 #define IEEE80211_RADIOTAP_VHT_KNOWN_GI 0x0004 #define IEEE80211_RADIOTAP_VHT_KNOWN_SGI_NSYM_DIS 0x0008 #define IEEE80211_RADIOTAP_VHT_KNOWN_LDPC_EXTRA_OFDM_SYM 0x0010 #define IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED 0x0020 #define IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH 0x0040 #define IEEE80211_RADIOTAP_VHT_KNOWN_GROUP_ID 0x0080 #define IEEE80211_RADIOTAP_VHT_KNOWN_PARTIAL_AID 0x0100 #define IEEE80211_RADIOTAP_VHT_FLAG_STBC 0x01 #define IEEE80211_RADIOTAP_VHT_FLAG_TXOP_PS_NA 0x02 #define IEEE80211_RADIOTAP_VHT_FLAG_SGI 0x04 #define IEEE80211_RADIOTAP_VHT_FLAG_SGI_NSYM_M10_9 0x08 #define IEEE80211_RADIOTAP_VHT_FLAG_LDPC_EXTRA_OFDM_SYM 0x10 #define IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED 0x20 #define IEEE80211_RADIOTAP_CODING_LDPC_USER0 0x01 #define IEEE80211_RADIOTAP_CODING_LDPC_USER1 0x02 #define IEEE80211_RADIOTAP_CODING_LDPC_USER2 0x04 #define IEEE80211_RADIOTAP_CODING_LDPC_USER3 0x08 /* For IEEE80211_RADIOTAP_TIMESTAMP */ #define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MASK 0x000F #define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MS 0x0000 #define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_US 0x0001 #define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_NS 0x0003 #define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_MASK 0x00F0 #define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_BEGIN_MDPU 0x0000 #define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_MPDU 0x0010 #define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_PPDU 0x0020 #define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_PLCP_SIG_ACQ 0x0030 #define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_UNKNOWN 0x00F0 #define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_64BIT 0x00 #define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT 0x01 #define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY 0x02 /* helpers */ static inline int ieee80211_get_radiotap_len(unsigned char *data) { struct ieee80211_radiotap_header *hdr = (struct ieee80211_radiotap_header *)data; return get_unaligned_le16(&hdr->it_len); } #endif /* IEEE80211_RADIOTAP_H */ |