Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211.h
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1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD: releng/5.2/sys/net80211/ieee80211.h 120098 2003-09-15 19:36:34Z sam $ 33 */ 34 #ifndef _NET80211_IEEE80211_H_ 35 #define _NET80211_IEEE80211_H_ 36 37 /* 38 * 802.11 protocol definitions. 39 */ 40 41 #define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */ 42 /* is 802.11 address multicast/broadcast? */ 43 #define IEEE80211_IS_MULTICAST(_a) (*(_a) & 0x01) 44 45 /* IEEE 802.11 PLCP header */ 46 struct ieee80211_plcp_hdr { 47 u_int16_t i_sfd; 48 u_int8_t i_signal; 49 u_int8_t i_service; 50 u_int16_t i_length; 51 u_int16_t i_crc; 52 } __attribute__((__packed__)); 53 54 /* 55 * generic definitions for IEEE 802.11 frames 56 */ 57 struct ieee80211_frame { 58 u_int8_t i_fc[2]; 59 u_int8_t i_dur[2]; 60 u_int8_t i_addr1[IEEE80211_ADDR_LEN]; 61 u_int8_t i_addr2[IEEE80211_ADDR_LEN]; 62 u_int8_t i_addr3[IEEE80211_ADDR_LEN]; 63 u_int8_t i_seq[2]; 64 /* possibly followed by addr4[IEEE80211_ADDR_LEN]; */ 65 /* see below */ 66 } __attribute__((__packed__)); 67 68 struct ieee80211_frame_addr4 { 69 u_int8_t i_fc[2]; 70 u_int8_t i_dur[2]; 71 u_int8_t i_addr1[IEEE80211_ADDR_LEN]; 72 u_int8_t i_addr2[IEEE80211_ADDR_LEN]; 73 u_int8_t i_addr3[IEEE80211_ADDR_LEN]; 74 u_int8_t i_seq[2]; 75 u_int8_t i_addr4[IEEE80211_ADDR_LEN]; 76 } __attribute__((__packed__)); 77 78 #define IEEE80211_FC0_VERSION_MASK 0x03 79 #define IEEE80211_FC0_VERSION_SHIFT 0 80 #define IEEE80211_FC0_VERSION_0 0x00 81 #define IEEE80211_FC0_TYPE_MASK 0x0c 82 #define IEEE80211_FC0_TYPE_SHIFT 2 83 #define IEEE80211_FC0_TYPE_MGT 0x00 84 #define IEEE80211_FC0_TYPE_CTL 0x04 85 #define IEEE80211_FC0_TYPE_DATA 0x08 86 87 #define IEEE80211_FC0_SUBTYPE_MASK 0xf0 88 #define IEEE80211_FC0_SUBTYPE_SHIFT 4 89 /* for TYPE_MGT */ 90 #define IEEE80211_FC0_SUBTYPE_ASSOC_REQ 0x00 91 #define IEEE80211_FC0_SUBTYPE_ASSOC_RESP 0x10 92 #define IEEE80211_FC0_SUBTYPE_REASSOC_REQ 0x20 93 #define IEEE80211_FC0_SUBTYPE_REASSOC_RESP 0x30 94 #define IEEE80211_FC0_SUBTYPE_PROBE_REQ 0x40 95 #define IEEE80211_FC0_SUBTYPE_PROBE_RESP 0x50 96 #define IEEE80211_FC0_SUBTYPE_BEACON 0x80 97 #define IEEE80211_FC0_SUBTYPE_ATIM 0x90 98 #define IEEE80211_FC0_SUBTYPE_DISASSOC 0xa0 99 #define IEEE80211_FC0_SUBTYPE_AUTH 0xb0 100 #define IEEE80211_FC0_SUBTYPE_DEAUTH 0xc0 101 /* for TYPE_CTL */ 102 #define IEEE80211_FC0_SUBTYPE_PS_POLL 0xa0 103 #define IEEE80211_FC0_SUBTYPE_RTS 0xb0 104 #define IEEE80211_FC0_SUBTYPE_CTS 0xc0 105 #define IEEE80211_FC0_SUBTYPE_ACK 0xd0 106 #define IEEE80211_FC0_SUBTYPE_CF_END 0xe0 107 #define IEEE80211_FC0_SUBTYPE_CF_END_ACK 0xf0 108 /* for TYPE_DATA (bit combination) */ 109 #define IEEE80211_FC0_SUBTYPE_DATA 0x00 110 #define IEEE80211_FC0_SUBTYPE_CF_ACK 0x10 111 #define IEEE80211_FC0_SUBTYPE_CF_POLL 0x20 112 #define IEEE80211_FC0_SUBTYPE_CF_ACPL 0x30 113 #define IEEE80211_FC0_SUBTYPE_NODATA 0x40 114 #define IEEE80211_FC0_SUBTYPE_CFACK 0x50 115 #define IEEE80211_FC0_SUBTYPE_CFPOLL 0x60 116 #define IEEE80211_FC0_SUBTYPE_CF_ACK_CF_ACK 0x70 117 118 #define IEEE80211_FC1_DIR_MASK 0x03 119 #define IEEE80211_FC1_DIR_NODS 0x00 /* STA->STA */ 120 #define IEEE80211_FC1_DIR_TODS 0x01 /* STA->AP */ 121 #define IEEE80211_FC1_DIR_FROMDS 0x02 /* AP ->STA */ 122 #define IEEE80211_FC1_DIR_DSTODS 0x03 /* AP ->AP */ 123 124 #define IEEE80211_FC1_MORE_FRAG 0x04 125 #define IEEE80211_FC1_RETRY 0x08 126 #define IEEE80211_FC1_PWR_MGT 0x10 127 #define IEEE80211_FC1_MORE_DATA 0x20 128 #define IEEE80211_FC1_WEP 0x40 129 #define IEEE80211_FC1_ORDER 0x80 130 131 #define IEEE80211_SEQ_FRAG_MASK 0x000f 132 #define IEEE80211_SEQ_FRAG_SHIFT 0 133 #define IEEE80211_SEQ_SEQ_MASK 0xfff0 134 #define IEEE80211_SEQ_SEQ_SHIFT 4 135 136 #define IEEE80211_NWID_LEN 32 137 138 /* 139 * Control frames. 140 */ 141 struct ieee80211_frame_min { 142 u_int8_t i_fc[2]; 143 u_int8_t i_dur[2]; 144 u_int8_t i_addr1[IEEE80211_ADDR_LEN]; 145 u_int8_t i_addr2[IEEE80211_ADDR_LEN]; 146 /* FCS */ 147 } __attribute__((__packed__)); 148 149 struct ieee80211_frame_rts { 150 u_int8_t i_fc[2]; 151 u_int8_t i_dur[2]; 152 u_int8_t i_ra[IEEE80211_ADDR_LEN]; 153 u_int8_t i_ta[IEEE80211_ADDR_LEN]; 154 /* FCS */ 155 } __attribute__((__packed__)); 156 157 struct ieee80211_frame_cts { 158 u_int8_t i_fc[2]; 159 u_int8_t i_dur[2]; 160 u_int8_t i_ra[IEEE80211_ADDR_LEN]; 161 /* FCS */ 162 } __attribute__((__packed__)); 163 164 struct ieee80211_frame_ack { 165 u_int8_t i_fc[2]; 166 u_int8_t i_dur[2]; 167 u_int8_t i_ra[IEEE80211_ADDR_LEN]; 168 /* FCS */ 169 } __attribute__((__packed__)); 170 171 struct ieee80211_frame_pspoll { 172 u_int8_t i_fc[2]; 173 u_int8_t i_aid[2]; 174 u_int8_t i_bssid[IEEE80211_ADDR_LEN]; 175 u_int8_t i_ta[IEEE80211_ADDR_LEN]; 176 /* FCS */ 177 } __attribute__((__packed__)); 178 179 struct ieee80211_frame_cfend { /* NB: also CF-End+CF-Ack */ 180 u_int8_t i_fc[2]; 181 u_int8_t i_dur[2]; /* should be zero */ 182 u_int8_t i_ra[IEEE80211_ADDR_LEN]; 183 u_int8_t i_bssid[IEEE80211_ADDR_LEN]; 184 /* FCS */ 185 } __attribute__((__packed__)); 186 187 /* 188 * BEACON management packets 189 * 190 * octet timestamp[8] 191 * octet beacon interval[2] 192 * octet capability information[2] 193 * information element 194 * octet elemid 195 * octet length 196 * octet information[length] 197 */ 198 199 typedef uint8_t *ieee80211_mgt_beacon_t; 200 201 #define IEEE80211_BEACON_INTERVAL(beacon) \ 202 ((beacon)[8] | ((beacon)[9] << 8)) 203 #define IEEE80211_BEACON_CAPABILITY(beacon) \ 204 ((beacon)[10] | ((beacon)[11] << 8)) 205 206 #define IEEE80211_CAPINFO_ESS 0x0001 207 #define IEEE80211_CAPINFO_IBSS 0x0002 208 #define IEEE80211_CAPINFO_CF_POLLABLE 0x0004 209 #define IEEE80211_CAPINFO_CF_POLLREQ 0x0008 210 #define IEEE80211_CAPINFO_PRIVACY 0x0010 211 #define IEEE80211_CAPINFO_SHORT_PREAMBLE 0x0020 212 #define IEEE80211_CAPINFO_PBCC 0x0040 213 #define IEEE80211_CAPINFO_CHNL_AGILITY 0x0080 214 /* bits 8-9 are reserved */ 215 #define IEEE80211_CAPINFO_SHORT_SLOTTIME 0x0400 216 /* bits 11-12 are reserved */ 217 #define IEEE80211_CAPINFO_DSSSOFDM 0x2000 218 /* bits 14-15 are reserved */ 219 220 /* 221 * Management information elements 222 */ 223 struct ieee80211_information { 224 char ssid[IEEE80211_NWID_LEN+1]; 225 struct rates { 226 u_int8_t *p; 227 } rates; 228 struct fh { 229 u_int16_t dwell; 230 u_int8_t set; 231 u_int8_t pattern; 232 u_int8_t index; 233 } fh; 234 struct ds { 235 u_int8_t channel; 236 } ds; 237 struct cf { 238 u_int8_t count; 239 u_int8_t period; 240 u_int8_t maxdur[2]; 241 u_int8_t dur[2]; 242 } cf; 243 struct tim { 244 u_int8_t count; 245 u_int8_t period; 246 u_int8_t bitctl; 247 /* u_int8_t pvt[251]; The driver needs to use this. */ 248 } tim; 249 struct ibss { 250 u_int16_t atim; 251 } ibss; 252 struct challenge { 253 u_int8_t *p; 254 u_int8_t len; 255 } challenge; 256 struct erp { 257 u_int8_t flags; 258 } erp; 259 }; 260 261 enum { 262 IEEE80211_ELEMID_SSID = 0, 263 IEEE80211_ELEMID_RATES = 1, 264 IEEE80211_ELEMID_FHPARMS = 2, 265 IEEE80211_ELEMID_DSPARMS = 3, 266 IEEE80211_ELEMID_CFPARMS = 4, 267 IEEE80211_ELEMID_TIM = 5, 268 IEEE80211_ELEMID_IBSSPARMS = 6, 269 IEEE80211_ELEMID_COUNTRY = 7, 270 IEEE80211_ELEMID_CHALLENGE = 16, 271 IEEE80211_ELEMID_ERP = 42, 272 IEEE80211_ELEMID_XRATES = 50, 273 }; 274 275 #define IEEE80211_RATE_BASIC 0x80 276 #define IEEE80211_RATE_VAL 0x7f 277 278 /* EPR information element flags */ 279 #define IEEE80211_ERP_NON_ERP_PRESENT 0x01 280 #define IEEE80211_ERP_USE_PROTECTION 0x02 281 #define IEEE80211_ERP_BARKER_MODE 0x04 282 283 /* 284 * AUTH management packets 285 * 286 * octet algo[2] 287 * octet seq[2] 288 * octet status[2] 289 * octet chal.id 290 * octet chal.length 291 * octet chal.text[253] 292 */ 293 294 typedef u_int8_t *ieee80211_mgt_auth_t; 295 296 #define IEEE80211_AUTH_ALGORITHM(auth) \ 297 ((auth)[0] | ((auth)[1] << 8)) 298 #define IEEE80211_AUTH_TRANSACTION(auth) \ 299 ((auth)[2] | ((auth)[3] << 8)) 300 #define IEEE80211_AUTH_STATUS(auth) \ 301 ((auth)[4] | ((auth)[5] << 8)) 302 303 #define IEEE80211_AUTH_ALG_OPEN 0x0000 304 #define IEEE80211_AUTH_ALG_SHARED 0x0001 305 306 enum { 307 IEEE80211_AUTH_OPEN_REQUEST = 1, 308 IEEE80211_AUTH_OPEN_RESPONSE = 2, 309 }; 310 311 enum { 312 IEEE80211_AUTH_SHARED_REQUEST = 1, 313 IEEE80211_AUTH_SHARED_CHALLENGE = 2, 314 IEEE80211_AUTH_SHARED_RESPONSE = 3, 315 IEEE80211_AUTH_SHARED_PASS = 4, 316 }; 317 318 /* 319 * Reason codes 320 * 321 * Unlisted codes are reserved 322 */ 323 324 enum { 325 IEEE80211_REASON_UNSPECIFIED = 1, 326 IEEE80211_REASON_AUTH_EXPIRE = 2, 327 IEEE80211_REASON_AUTH_LEAVE = 3, 328 IEEE80211_REASON_ASSOC_EXPIRE = 4, 329 IEEE80211_REASON_ASSOC_TOOMANY = 5, 330 IEEE80211_REASON_NOT_AUTHED = 6, 331 IEEE80211_REASON_NOT_ASSOCED = 7, 332 IEEE80211_REASON_ASSOC_LEAVE = 8, 333 IEEE80211_REASON_ASSOC_NOT_AUTHED = 9, 334 335 IEEE80211_STATUS_SUCCESS = 0, 336 IEEE80211_STATUS_UNSPECIFIED = 1, 337 IEEE80211_STATUS_CAPINFO = 10, 338 IEEE80211_STATUS_NOT_ASSOCED = 11, 339 IEEE80211_STATUS_OTHER = 12, 340 IEEE80211_STATUS_ALG = 13, 341 IEEE80211_STATUS_SEQUENCE = 14, 342 IEEE80211_STATUS_CHALLENGE = 15, 343 IEEE80211_STATUS_TIMEOUT = 16, 344 IEEE80211_STATUS_TOOMANY = 17, 345 IEEE80211_STATUS_BASIC_RATE = 18, 346 IEEE80211_STATUS_SP_REQUIRED = 19, 347 IEEE80211_STATUS_PBCC_REQUIRED = 20, 348 IEEE80211_STATUS_CA_REQUIRED = 21, 349 IEEE80211_STATUS_TOO_MANY_STATIONS = 22, 350 IEEE80211_STATUS_RATES = 23, 351 IEEE80211_STATUS_SHORTSLOT_REQUIRED = 25, 352 IEEE80211_STATUS_DSSSOFDM_REQUIRED = 26, 353 }; 354 355 #define IEEE80211_WEP_KEYLEN 5 /* 40bit */ 356 #define IEEE80211_WEP_IVLEN 3 /* 24bit */ 357 #define IEEE80211_WEP_KIDLEN 1 /* 1 octet */ 358 #define IEEE80211_WEP_CRCLEN 4 /* CRC-32 */ 359 #define IEEE80211_WEP_NKID 4 /* number of key ids */ 360 361 #define IEEE80211_CRC_LEN 4 362 363 #define IEEE80211_MTU 1500 364 #define IEEE80211_MAX_LEN (2300 + IEEE80211_CRC_LEN + \ 365 (IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_CRCLEN)) 366 #define IEEE80211_MIN_LEN \ 367 (sizeof(struct ieee80211_frame_min) + IEEE80211_CRC_LEN) 368 369 /* 370 * RTS frame length parameters. The default is specified in 371 * the 802.11 spec. The max may be wrong for jumbo frames. 372 */ 373 #define IEEE80211_RTS_DEFAULT 512 374 #define IEEE80211_RTS_MIN 1 375 #define IEEE80211_RTS_MAX IEEE80211_MAX_LEN 376 377 enum { 378 IEEE80211_AUTH_NONE = 0, 379 IEEE80211_AUTH_OPEN = 1, 380 IEEE80211_AUTH_SHARED = 2, 381 }; 382 383 #endif /* _NET80211_IEEE80211_H_ */
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