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_proto.h
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1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 #ifndef _NET80211_IEEE80211_PROTO_H_ 29 #define _NET80211_IEEE80211_PROTO_H_ 30 31 /* 32 * 802.11 protocol implementation definitions. 33 */ 34 35 enum ieee80211_state { 36 IEEE80211_S_INIT = 0, /* default state */ 37 IEEE80211_S_SCAN = 1, /* scanning */ 38 IEEE80211_S_AUTH = 2, /* try to authenticate */ 39 IEEE80211_S_ASSOC = 3, /* try to assoc */ 40 IEEE80211_S_CAC = 4, /* doing channel availability check */ 41 IEEE80211_S_RUN = 5, /* operational (e.g. associated) */ 42 IEEE80211_S_CSA = 6, /* channel switch announce pending */ 43 IEEE80211_S_SLEEP = 7, /* power save */ 44 }; 45 #define IEEE80211_S_MAX (IEEE80211_S_SLEEP+1) 46 47 #define IEEE80211_SEND_MGMT(_ni,_type,_arg) \ 48 ((*(_ni)->ni_ic->ic_send_mgmt)(_ni, _type, _arg)) 49 50 extern const char *ieee80211_mgt_subtype_name[]; 51 extern const char *ieee80211_phymode_name[IEEE80211_MODE_MAX]; 52 extern const int ieee80211_opcap[IEEE80211_OPMODE_MAX]; 53 54 void ieee80211_proto_attach(struct ieee80211com *); 55 void ieee80211_proto_detach(struct ieee80211com *); 56 void ieee80211_proto_vattach(struct ieee80211vap *); 57 void ieee80211_proto_vdetach(struct ieee80211vap *); 58 59 void ieee80211_syncifflag_locked(struct ieee80211com *, int flag); 60 void ieee80211_syncflag(struct ieee80211vap *, int flag); 61 void ieee80211_syncflag_ht(struct ieee80211vap *, int flag); 62 void ieee80211_syncflag_ext(struct ieee80211vap *, int flag); 63 64 #define IEEE80211_R_NF 0x0000001 /* global NF value valid */ 65 #define IEEE80211_R_RSSI 0x0000002 /* global RSSI value valid */ 66 #define IEEE80211_R_C_CHAIN 0x0000004 /* RX chain count valid */ 67 #define IEEE80211_R_C_NF 0x0000008 /* per-chain NF value valid */ 68 #define IEEE80211_R_C_RSSI 0x0000010 /* per-chain RSSI value valid */ 69 #define IEEE80211_R_C_EVM 0x0000020 /* per-chain EVM valid */ 70 #define IEEE80211_R_C_HT40 0x0000040 /* RX'ed packet is 40mhz, pilots 4,5 valid */ 71 72 struct ieee80211_rx_stats { 73 uint32_t r_flags; /* IEEE80211_R_* flags */ 74 uint8_t c_chain; /* number of RX chains involved */ 75 int16_t c_nf_ctl[IEEE80211_MAX_CHAINS]; /* per-chain NF */ 76 int16_t c_nf_ext[IEEE80211_MAX_CHAINS]; /* per-chain NF */ 77 int16_t c_rssi_ctl[IEEE80211_MAX_CHAINS]; /* per-chain RSSI */ 78 int16_t c_rssi_ext[IEEE80211_MAX_CHAINS]; /* per-chain RSSI */ 79 uint8_t nf; /* global NF */ 80 uint8_t rssi; /* global RSSI */ 81 uint8_t evm[IEEE80211_MAX_CHAINS][IEEE80211_MAX_EVM_PILOTS]; 82 /* per-chain, per-pilot EVM values */ 83 }; 84 85 #define ieee80211_input(ni, m, rssi, nf) \ 86 ((ni)->ni_vap->iv_input(ni, m, rssi, nf)) 87 int ieee80211_input_all(struct ieee80211com *, struct mbuf *, int, int); 88 89 int ieee80211_input_mimo(struct ieee80211_node *, struct mbuf *, 90 struct ieee80211_rx_stats *); 91 int ieee80211_input_mimo_all(struct ieee80211com *, struct mbuf *, 92 struct ieee80211_rx_stats *); 93 94 struct ieee80211_bpf_params; 95 int ieee80211_mgmt_output(struct ieee80211_node *, struct mbuf *, int, 96 struct ieee80211_bpf_params *); 97 int ieee80211_raw_xmit(struct ieee80211_node *, struct mbuf *, 98 const struct ieee80211_bpf_params *); 99 int ieee80211_output(struct ifnet *, struct mbuf *, 100 struct sockaddr *, struct route *ro); 101 void ieee80211_send_setup(struct ieee80211_node *, struct mbuf *, int, int, 102 const uint8_t [IEEE80211_ADDR_LEN], const uint8_t [IEEE80211_ADDR_LEN], 103 const uint8_t [IEEE80211_ADDR_LEN]); 104 void ieee80211_start(struct ifnet *); 105 int ieee80211_send_nulldata(struct ieee80211_node *); 106 int ieee80211_classify(struct ieee80211_node *, struct mbuf *m); 107 struct mbuf *ieee80211_mbuf_adjust(struct ieee80211vap *, int, 108 struct ieee80211_key *, struct mbuf *); 109 struct mbuf *ieee80211_encap(struct ieee80211vap *, struct ieee80211_node *, 110 struct mbuf *); 111 int ieee80211_send_mgmt(struct ieee80211_node *, int, int); 112 struct ieee80211_appie; 113 int ieee80211_send_probereq(struct ieee80211_node *ni, 114 const uint8_t sa[IEEE80211_ADDR_LEN], 115 const uint8_t da[IEEE80211_ADDR_LEN], 116 const uint8_t bssid[IEEE80211_ADDR_LEN], 117 const uint8_t *ssid, size_t ssidlen); 118 /* 119 * The formation of ProbeResponse frames requires guidance to 120 * deal with legacy clients. When the client is identified as 121 * "legacy 11b" ieee80211_send_proberesp is passed this token. 122 */ 123 #define IEEE80211_SEND_LEGACY_11B 0x1 /* legacy 11b client */ 124 #define IEEE80211_SEND_LEGACY_11 0x2 /* other legacy client */ 125 #define IEEE80211_SEND_LEGACY 0x3 /* any legacy client */ 126 struct mbuf *ieee80211_alloc_proberesp(struct ieee80211_node *, int); 127 int ieee80211_send_proberesp(struct ieee80211vap *, 128 const uint8_t da[IEEE80211_ADDR_LEN], int); 129 struct mbuf *ieee80211_alloc_rts(struct ieee80211com *ic, 130 const uint8_t [IEEE80211_ADDR_LEN], 131 const uint8_t [IEEE80211_ADDR_LEN], uint16_t); 132 struct mbuf *ieee80211_alloc_cts(struct ieee80211com *, 133 const uint8_t [IEEE80211_ADDR_LEN], uint16_t); 134 135 uint8_t *ieee80211_add_rates(uint8_t *, const struct ieee80211_rateset *); 136 uint8_t *ieee80211_add_xrates(uint8_t *, const struct ieee80211_rateset *); 137 uint8_t *ieee80211_add_wpa(uint8_t *, const struct ieee80211vap *); 138 uint8_t *ieee80211_add_rsn(uint8_t *, const struct ieee80211vap *); 139 uint8_t *ieee80211_add_qos(uint8_t *, const struct ieee80211_node *); 140 uint16_t ieee80211_getcapinfo(struct ieee80211vap *, 141 struct ieee80211_channel *); 142 143 void ieee80211_reset_erp(struct ieee80211com *); 144 void ieee80211_set_shortslottime(struct ieee80211com *, int onoff); 145 int ieee80211_iserp_rateset(const struct ieee80211_rateset *); 146 void ieee80211_setbasicrates(struct ieee80211_rateset *, 147 enum ieee80211_phymode); 148 void ieee80211_addbasicrates(struct ieee80211_rateset *, 149 enum ieee80211_phymode); 150 151 /* 152 * Return the size of the 802.11 header for a management or data frame. 153 */ 154 static __inline int 155 ieee80211_hdrsize(const void *data) 156 { 157 const struct ieee80211_frame *wh = data; 158 int size = sizeof(struct ieee80211_frame); 159 160 /* NB: we don't handle control frames */ 161 KASSERT((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL, 162 ("%s: control frame", __func__)); 163 if (IEEE80211_IS_DSTODS(wh)) 164 size += IEEE80211_ADDR_LEN; 165 if (IEEE80211_QOS_HAS_SEQ(wh)) 166 size += sizeof(uint16_t); 167 return size; 168 } 169 170 /* 171 * Like ieee80211_hdrsize, but handles any type of frame. 172 */ 173 static __inline int 174 ieee80211_anyhdrsize(const void *data) 175 { 176 const struct ieee80211_frame *wh = data; 177 178 if ((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) { 179 switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) { 180 case IEEE80211_FC0_SUBTYPE_CTS: 181 case IEEE80211_FC0_SUBTYPE_ACK: 182 return sizeof(struct ieee80211_frame_ack); 183 case IEEE80211_FC0_SUBTYPE_BAR: 184 return sizeof(struct ieee80211_frame_bar); 185 } 186 return sizeof(struct ieee80211_frame_min); 187 } else 188 return ieee80211_hdrsize(data); 189 } 190 191 /* 192 * Template for an in-kernel authenticator. Authenticators 193 * register with the protocol code and are typically loaded 194 * as separate modules as needed. One special authenticator 195 * is xauth; it intercepts requests so that protocols like 196 * WPA can be handled in user space. 197 */ 198 struct ieee80211_authenticator { 199 const char *ia_name; /* printable name */ 200 int (*ia_attach)(struct ieee80211vap *); 201 void (*ia_detach)(struct ieee80211vap *); 202 void (*ia_node_join)(struct ieee80211_node *); 203 void (*ia_node_leave)(struct ieee80211_node *); 204 }; 205 void ieee80211_authenticator_register(int type, 206 const struct ieee80211_authenticator *); 207 void ieee80211_authenticator_unregister(int type); 208 const struct ieee80211_authenticator *ieee80211_authenticator_get(int auth); 209 210 struct ieee80211req; 211 /* 212 * Template for an MAC ACL policy module. Such modules 213 * register with the protocol code and are passed the sender's 214 * address of each received auth frame for validation. 215 */ 216 struct ieee80211_aclator { 217 const char *iac_name; /* printable name */ 218 int (*iac_attach)(struct ieee80211vap *); 219 void (*iac_detach)(struct ieee80211vap *); 220 int (*iac_check)(struct ieee80211vap *, 221 const uint8_t mac[IEEE80211_ADDR_LEN]); 222 int (*iac_add)(struct ieee80211vap *, 223 const uint8_t mac[IEEE80211_ADDR_LEN]); 224 int (*iac_remove)(struct ieee80211vap *, 225 const uint8_t mac[IEEE80211_ADDR_LEN]); 226 int (*iac_flush)(struct ieee80211vap *); 227 int (*iac_setpolicy)(struct ieee80211vap *, int); 228 int (*iac_getpolicy)(struct ieee80211vap *); 229 int (*iac_setioctl)(struct ieee80211vap *, struct ieee80211req *); 230 int (*iac_getioctl)(struct ieee80211vap *, struct ieee80211req *); 231 }; 232 void ieee80211_aclator_register(const struct ieee80211_aclator *); 233 void ieee80211_aclator_unregister(const struct ieee80211_aclator *); 234 const struct ieee80211_aclator *ieee80211_aclator_get(const char *name); 235 236 /* flags for ieee80211_fix_rate() */ 237 #define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */ 238 #define IEEE80211_F_DOFRATE 0x00000002 /* use fixed legacy rate */ 239 #define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */ 240 #define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */ 241 #define IEEE80211_F_DOBRS 0x00000010 /* check basic rate set */ 242 #define IEEE80211_F_JOIN 0x00000020 /* sta joining our bss */ 243 #define IEEE80211_F_DOFMCS 0x00000040 /* use fixed HT rate */ 244 int ieee80211_fix_rate(struct ieee80211_node *, 245 struct ieee80211_rateset *, int); 246 247 /* 248 * WME/WMM support. 249 */ 250 struct wmeParams { 251 uint8_t wmep_acm; 252 uint8_t wmep_aifsn; 253 uint8_t wmep_logcwmin; /* log2(cwmin) */ 254 uint8_t wmep_logcwmax; /* log2(cwmax) */ 255 uint8_t wmep_txopLimit; 256 uint8_t wmep_noackPolicy; /* 0 (ack), 1 (no ack) */ 257 }; 258 #define IEEE80211_TXOP_TO_US(_txop) ((_txop)<<5) 259 #define IEEE80211_US_TO_TXOP(_us) ((_us)>>5) 260 261 struct chanAccParams { 262 uint8_t cap_info; /* version of the current set */ 263 struct wmeParams cap_wmeParams[WME_NUM_AC]; 264 }; 265 266 struct ieee80211_wme_state { 267 u_int wme_flags; 268 #define WME_F_AGGRMODE 0x00000001 /* STATUS: WME agressive mode */ 269 u_int wme_hipri_traffic; /* VI/VO frames in beacon interval */ 270 u_int wme_hipri_switch_thresh;/* agressive mode switch thresh */ 271 u_int wme_hipri_switch_hysteresis;/* agressive mode switch hysteresis */ 272 273 struct wmeParams wme_params[4]; /* from assoc resp for each AC*/ 274 struct chanAccParams wme_wmeChanParams; /* WME params applied to self */ 275 struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */ 276 struct chanAccParams wme_chanParams; /* params applied to self */ 277 struct chanAccParams wme_bssChanParams; /* params bcast to stations */ 278 279 int (*wme_update)(struct ieee80211com *); 280 }; 281 282 void ieee80211_wme_initparams(struct ieee80211vap *); 283 void ieee80211_wme_updateparams(struct ieee80211vap *); 284 void ieee80211_wme_updateparams_locked(struct ieee80211vap *); 285 286 /* 287 * Return the WME TID from a QoS frame. If no TID 288 * is present return the index for the "non-QoS" entry. 289 */ 290 static __inline uint8_t 291 ieee80211_gettid(const struct ieee80211_frame *wh) 292 { 293 uint8_t tid; 294 295 if (IEEE80211_QOS_HAS_SEQ(wh)) { 296 if (IEEE80211_IS_DSTODS(wh)) 297 tid = ((const struct ieee80211_qosframe_addr4 *)wh)-> 298 i_qos[0]; 299 else 300 tid = ((const struct ieee80211_qosframe *)wh)->i_qos[0]; 301 tid &= IEEE80211_QOS_TID; 302 } else 303 tid = IEEE80211_NONQOS_TID; 304 return tid; 305 } 306 307 void ieee80211_waitfor_parent(struct ieee80211com *); 308 void ieee80211_start_locked(struct ieee80211vap *); 309 void ieee80211_init(void *); 310 void ieee80211_start_all(struct ieee80211com *); 311 void ieee80211_stop_locked(struct ieee80211vap *); 312 void ieee80211_stop(struct ieee80211vap *); 313 void ieee80211_stop_all(struct ieee80211com *); 314 void ieee80211_suspend_all(struct ieee80211com *); 315 void ieee80211_resume_all(struct ieee80211com *); 316 void ieee80211_dturbo_switch(struct ieee80211vap *, int newflags); 317 void ieee80211_swbmiss(void *arg); 318 void ieee80211_beacon_miss(struct ieee80211com *); 319 int ieee80211_new_state(struct ieee80211vap *, enum ieee80211_state, int); 320 void ieee80211_print_essid(const uint8_t *, int); 321 void ieee80211_dump_pkt(struct ieee80211com *, 322 const uint8_t *, int, int, int); 323 324 extern const char *ieee80211_opmode_name[]; 325 extern const char *ieee80211_state_name[IEEE80211_S_MAX]; 326 extern const char *ieee80211_wme_acnames[]; 327 328 /* 329 * Beacon frames constructed by ieee80211_beacon_alloc 330 * have the following structure filled in so drivers 331 * can update the frame later w/ minimal overhead. 332 */ 333 struct ieee80211_beacon_offsets { 334 uint8_t bo_flags[4]; /* update/state flags */ 335 uint16_t *bo_caps; /* capabilities */ 336 uint8_t *bo_cfp; /* start of CFParms element */ 337 uint8_t *bo_tim; /* start of atim/dtim */ 338 uint8_t *bo_wme; /* start of WME parameters */ 339 uint8_t *bo_tdma; /* start of TDMA parameters */ 340 uint8_t *bo_tim_trailer;/* start of fixed-size trailer */ 341 uint16_t bo_tim_len; /* atim/dtim length in bytes */ 342 uint16_t bo_tim_trailer_len;/* tim trailer length in bytes */ 343 uint8_t *bo_erp; /* start of ERP element */ 344 uint8_t *bo_htinfo; /* start of HT info element */ 345 uint8_t *bo_ath; /* start of ATH parameters */ 346 uint8_t *bo_appie; /* start of AppIE element */ 347 uint16_t bo_appie_len; /* AppIE length in bytes */ 348 uint16_t bo_csa_trailer_len; 349 uint8_t *bo_csa; /* start of CSA element */ 350 uint8_t *bo_meshconf; /* start of MESHCONF element */ 351 uint8_t *bo_spare[3]; 352 }; 353 struct mbuf *ieee80211_beacon_alloc(struct ieee80211_node *, 354 struct ieee80211_beacon_offsets *); 355 356 /* 357 * Beacon frame updates are signaled through calls to iv_update_beacon 358 * with one of the IEEE80211_BEACON_* tokens defined below. For devices 359 * that construct beacon frames on the host this can trigger a rebuild 360 * or defer the processing. For devices that offload beacon frame 361 * handling this callback can be used to signal a rebuild. The bo_flags 362 * array in the ieee80211_beacon_offsets structure is intended to record 363 * deferred processing requirements; ieee80211_beacon_update uses the 364 * state to optimize work. Since this structure is owned by the driver 365 * and not visible to the 802.11 layer drivers must supply an iv_update_beacon 366 * callback that marks the flag bits and schedules (as necessary) an update. 367 */ 368 enum { 369 IEEE80211_BEACON_CAPS = 0, /* capabilities */ 370 IEEE80211_BEACON_TIM = 1, /* DTIM/ATIM */ 371 IEEE80211_BEACON_WME = 2, 372 IEEE80211_BEACON_ERP = 3, /* Extended Rate Phy */ 373 IEEE80211_BEACON_HTINFO = 4, /* HT Information */ 374 IEEE80211_BEACON_APPIE = 5, /* Application IE's */ 375 IEEE80211_BEACON_CFP = 6, /* CFParms */ 376 IEEE80211_BEACON_CSA = 7, /* Channel Switch Announcement */ 377 IEEE80211_BEACON_TDMA = 9, /* TDMA Info */ 378 IEEE80211_BEACON_ATH = 10, /* ATH parameters */ 379 IEEE80211_BEACON_MESHCONF = 11, /* Mesh Configuration */ 380 }; 381 int ieee80211_beacon_update(struct ieee80211_node *, 382 struct ieee80211_beacon_offsets *, struct mbuf *, int mcast); 383 384 void ieee80211_csa_startswitch(struct ieee80211com *, 385 struct ieee80211_channel *, int mode, int count); 386 void ieee80211_csa_completeswitch(struct ieee80211com *); 387 void ieee80211_csa_cancelswitch(struct ieee80211com *); 388 void ieee80211_cac_completeswitch(struct ieee80211vap *); 389 390 /* 391 * Notification methods called from the 802.11 state machine. 392 * Note that while these are defined here, their implementation 393 * is OS-specific. 394 */ 395 void ieee80211_notify_node_join(struct ieee80211_node *, int newassoc); 396 void ieee80211_notify_node_leave(struct ieee80211_node *); 397 void ieee80211_notify_scan_done(struct ieee80211vap *); 398 void ieee80211_notify_wds_discover(struct ieee80211_node *); 399 void ieee80211_notify_csa(struct ieee80211com *, 400 const struct ieee80211_channel *, int mode, int count); 401 void ieee80211_notify_radar(struct ieee80211com *, 402 const struct ieee80211_channel *); 403 enum ieee80211_notify_cac_event { 404 IEEE80211_NOTIFY_CAC_START = 0, /* CAC timer started */ 405 IEEE80211_NOTIFY_CAC_STOP = 1, /* CAC intentionally stopped */ 406 IEEE80211_NOTIFY_CAC_RADAR = 2, /* CAC stopped due to radar detectio */ 407 IEEE80211_NOTIFY_CAC_EXPIRE = 3, /* CAC expired w/o radar */ 408 }; 409 void ieee80211_notify_cac(struct ieee80211com *, 410 const struct ieee80211_channel *, 411 enum ieee80211_notify_cac_event); 412 void ieee80211_notify_node_deauth(struct ieee80211_node *); 413 void ieee80211_notify_node_auth(struct ieee80211_node *); 414 void ieee80211_notify_country(struct ieee80211vap *, const uint8_t [], 415 const uint8_t cc[2]); 416 void ieee80211_notify_radio(struct ieee80211com *, int); 417 #endif /* _NET80211_IEEE80211_PROTO_H_ */
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