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 *mgt_subtype_name[]; 51 extern const char *ctl_subtype_name[]; 52 extern const char *ieee80211_phymode_name[IEEE80211_MODE_MAX]; 53 extern const int ieee80211_opcap[IEEE80211_OPMODE_MAX]; 54 55 static __inline const char * 56 ieee80211_mgt_subtype_name(uint8_t subtype) 57 { 58 return mgt_subtype_name[(subtype & IEEE80211_FC0_SUBTYPE_MASK) >> 59 IEEE80211_FC0_SUBTYPE_SHIFT]; 60 } 61 62 static __inline const char * 63 ieee80211_ctl_subtype_name(uint8_t subtype) 64 { 65 return ctl_subtype_name[(subtype & IEEE80211_FC0_SUBTYPE_MASK) >> 66 IEEE80211_FC0_SUBTYPE_SHIFT]; 67 } 68 69 const char *ieee80211_reason_to_string(uint16_t); 70 71 void ieee80211_proto_attach(struct ieee80211com *); 72 void ieee80211_proto_detach(struct ieee80211com *); 73 void ieee80211_proto_vattach(struct ieee80211vap *); 74 void ieee80211_proto_vdetach(struct ieee80211vap *); 75 76 void ieee80211_promisc(struct ieee80211vap *, bool); 77 void ieee80211_allmulti(struct ieee80211vap *, bool); 78 void ieee80211_syncflag(struct ieee80211vap *, int flag); 79 void ieee80211_syncflag_ht(struct ieee80211vap *, int flag); 80 void ieee80211_syncflag_ext(struct ieee80211vap *, int flag); 81 82 #define ieee80211_input(ni, m, rssi, nf) \ 83 ((ni)->ni_vap->iv_input(ni, m, NULL, rssi, nf)) 84 int ieee80211_input_all(struct ieee80211com *, struct mbuf *, int, int); 85 86 int ieee80211_input_mimo(struct ieee80211_node *, struct mbuf *, 87 struct ieee80211_rx_stats *); 88 int ieee80211_input_mimo_all(struct ieee80211com *, struct mbuf *, 89 struct ieee80211_rx_stats *); 90 91 struct ieee80211_bpf_params; 92 int ieee80211_mgmt_output(struct ieee80211_node *, struct mbuf *, int, 93 struct ieee80211_bpf_params *); 94 int ieee80211_raw_xmit(struct ieee80211_node *, struct mbuf *, 95 const struct ieee80211_bpf_params *); 96 int ieee80211_output(struct ifnet *, struct mbuf *, 97 const struct sockaddr *, struct route *ro); 98 int ieee80211_vap_pkt_send_dest(struct ieee80211vap *, struct mbuf *, 99 struct ieee80211_node *); 100 int ieee80211_raw_output(struct ieee80211vap *, struct ieee80211_node *, 101 struct mbuf *, const struct ieee80211_bpf_params *); 102 void ieee80211_send_setup(struct ieee80211_node *, struct mbuf *, int, int, 103 const uint8_t [IEEE80211_ADDR_LEN], const uint8_t [IEEE80211_ADDR_LEN], 104 const uint8_t [IEEE80211_ADDR_LEN]); 105 int ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m); 106 void ieee80211_vap_qflush(struct ifnet *ifp); 107 int ieee80211_send_nulldata(struct ieee80211_node *); 108 int ieee80211_classify(struct ieee80211_node *, struct mbuf *m); 109 struct mbuf *ieee80211_mbuf_adjust(struct ieee80211vap *, int, 110 struct ieee80211_key *, struct mbuf *); 111 struct mbuf *ieee80211_encap(struct ieee80211vap *, struct ieee80211_node *, 112 struct mbuf *); 113 void ieee80211_free_mbuf(struct mbuf *); 114 int ieee80211_send_mgmt(struct ieee80211_node *, int, int); 115 struct ieee80211_appie; 116 int ieee80211_send_probereq(struct ieee80211_node *ni, 117 const uint8_t sa[IEEE80211_ADDR_LEN], 118 const uint8_t da[IEEE80211_ADDR_LEN], 119 const uint8_t bssid[IEEE80211_ADDR_LEN], 120 const uint8_t *ssid, size_t ssidlen); 121 struct mbuf * ieee80211_ff_encap1(struct ieee80211vap *, struct mbuf *, 122 const struct ether_header *); 123 void ieee80211_tx_complete(struct ieee80211_node *, 124 struct mbuf *, int); 125 126 /* 127 * The formation of ProbeResponse frames requires guidance to 128 * deal with legacy clients. When the client is identified as 129 * "legacy 11b" ieee80211_send_proberesp is passed this token. 130 */ 131 #define IEEE80211_SEND_LEGACY_11B 0x1 /* legacy 11b client */ 132 #define IEEE80211_SEND_LEGACY_11 0x2 /* other legacy client */ 133 #define IEEE80211_SEND_LEGACY 0x3 /* any legacy client */ 134 struct mbuf *ieee80211_alloc_proberesp(struct ieee80211_node *, int); 135 int ieee80211_send_proberesp(struct ieee80211vap *, 136 const uint8_t da[IEEE80211_ADDR_LEN], int); 137 struct mbuf *ieee80211_alloc_rts(struct ieee80211com *ic, 138 const uint8_t [IEEE80211_ADDR_LEN], 139 const uint8_t [IEEE80211_ADDR_LEN], uint16_t); 140 struct mbuf *ieee80211_alloc_cts(struct ieee80211com *, 141 const uint8_t [IEEE80211_ADDR_LEN], uint16_t); 142 143 uint8_t *ieee80211_add_rates(uint8_t *, const struct ieee80211_rateset *); 144 uint8_t *ieee80211_add_xrates(uint8_t *, const struct ieee80211_rateset *); 145 uint8_t *ieee80211_add_ssid(uint8_t *, const uint8_t *, u_int); 146 uint8_t *ieee80211_add_wpa(uint8_t *, const struct ieee80211vap *); 147 uint8_t *ieee80211_add_rsn(uint8_t *, const struct ieee80211vap *); 148 uint8_t *ieee80211_add_qos(uint8_t *, const struct ieee80211_node *); 149 uint16_t ieee80211_getcapinfo(struct ieee80211vap *, 150 struct ieee80211_channel *); 151 struct ieee80211_wme_state; 152 uint8_t * ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme); 153 154 void ieee80211_reset_erp(struct ieee80211com *); 155 void ieee80211_set_shortslottime(struct ieee80211com *, int onoff); 156 int ieee80211_iserp_rateset(const struct ieee80211_rateset *); 157 void ieee80211_setbasicrates(struct ieee80211_rateset *, 158 enum ieee80211_phymode); 159 void ieee80211_addbasicrates(struct ieee80211_rateset *, 160 enum ieee80211_phymode); 161 162 /* 163 * Return the size of the 802.11 header for a management or data frame. 164 */ 165 static __inline int 166 ieee80211_hdrsize(const void *data) 167 { 168 const struct ieee80211_frame *wh = data; 169 int size = sizeof(struct ieee80211_frame); 170 171 /* NB: we don't handle control frames */ 172 KASSERT((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL, 173 ("%s: control frame", __func__)); 174 if (IEEE80211_IS_DSTODS(wh)) 175 size += IEEE80211_ADDR_LEN; 176 if (IEEE80211_QOS_HAS_SEQ(wh)) 177 size += sizeof(uint16_t); 178 return size; 179 } 180 181 /* 182 * Like ieee80211_hdrsize, but handles any type of frame. 183 */ 184 static __inline int 185 ieee80211_anyhdrsize(const void *data) 186 { 187 const struct ieee80211_frame *wh = data; 188 189 if ((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) { 190 switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) { 191 case IEEE80211_FC0_SUBTYPE_CTS: 192 case IEEE80211_FC0_SUBTYPE_ACK: 193 return sizeof(struct ieee80211_frame_ack); 194 case IEEE80211_FC0_SUBTYPE_BAR: 195 return sizeof(struct ieee80211_frame_bar); 196 } 197 return sizeof(struct ieee80211_frame_min); 198 } else 199 return ieee80211_hdrsize(data); 200 } 201 202 /* 203 * Template for an in-kernel authenticator. Authenticators 204 * register with the protocol code and are typically loaded 205 * as separate modules as needed. One special authenticator 206 * is xauth; it intercepts requests so that protocols like 207 * WPA can be handled in user space. 208 */ 209 struct ieee80211_authenticator { 210 const char *ia_name; /* printable name */ 211 int (*ia_attach)(struct ieee80211vap *); 212 void (*ia_detach)(struct ieee80211vap *); 213 void (*ia_node_join)(struct ieee80211_node *); 214 void (*ia_node_leave)(struct ieee80211_node *); 215 }; 216 void ieee80211_authenticator_register(int type, 217 const struct ieee80211_authenticator *); 218 void ieee80211_authenticator_unregister(int type); 219 const struct ieee80211_authenticator *ieee80211_authenticator_get(int auth); 220 221 struct ieee80211req; 222 /* 223 * Template for an MAC ACL policy module. Such modules 224 * register with the protocol code and are passed the sender's 225 * address of each received auth frame for validation. 226 */ 227 struct ieee80211_aclator { 228 const char *iac_name; /* printable name */ 229 int (*iac_attach)(struct ieee80211vap *); 230 void (*iac_detach)(struct ieee80211vap *); 231 int (*iac_check)(struct ieee80211vap *, 232 const struct ieee80211_frame *wh); 233 int (*iac_add)(struct ieee80211vap *, 234 const uint8_t mac[IEEE80211_ADDR_LEN]); 235 int (*iac_remove)(struct ieee80211vap *, 236 const uint8_t mac[IEEE80211_ADDR_LEN]); 237 int (*iac_flush)(struct ieee80211vap *); 238 int (*iac_setpolicy)(struct ieee80211vap *, int); 239 int (*iac_getpolicy)(struct ieee80211vap *); 240 int (*iac_setioctl)(struct ieee80211vap *, struct ieee80211req *); 241 int (*iac_getioctl)(struct ieee80211vap *, struct ieee80211req *); 242 }; 243 void ieee80211_aclator_register(const struct ieee80211_aclator *); 244 void ieee80211_aclator_unregister(const struct ieee80211_aclator *); 245 const struct ieee80211_aclator *ieee80211_aclator_get(const char *name); 246 247 /* flags for ieee80211_fix_rate() */ 248 #define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */ 249 #define IEEE80211_F_DOFRATE 0x00000002 /* use fixed legacy rate */ 250 #define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */ 251 #define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */ 252 #define IEEE80211_F_DOBRS 0x00000010 /* check basic rate set */ 253 #define IEEE80211_F_JOIN 0x00000020 /* sta joining our bss */ 254 #define IEEE80211_F_DOFMCS 0x00000040 /* use fixed HT rate */ 255 int ieee80211_fix_rate(struct ieee80211_node *, 256 struct ieee80211_rateset *, int); 257 258 /* 259 * WME/WMM support. 260 */ 261 struct wmeParams { 262 uint8_t wmep_acm; 263 uint8_t wmep_aifsn; 264 uint8_t wmep_logcwmin; /* log2(cwmin) */ 265 uint8_t wmep_logcwmax; /* log2(cwmax) */ 266 uint8_t wmep_txopLimit; 267 uint8_t wmep_noackPolicy; /* 0 (ack), 1 (no ack) */ 268 }; 269 #define IEEE80211_TXOP_TO_US(_txop) ((_txop)<<5) 270 #define IEEE80211_US_TO_TXOP(_us) ((_us)>>5) 271 272 struct chanAccParams { 273 uint8_t cap_info; /* version of the current set */ 274 struct wmeParams cap_wmeParams[WME_NUM_AC]; 275 }; 276 277 struct ieee80211_wme_state { 278 u_int wme_flags; 279 #define WME_F_AGGRMODE 0x00000001 /* STATUS: WME agressive mode */ 280 u_int wme_hipri_traffic; /* VI/VO frames in beacon interval */ 281 u_int wme_hipri_switch_thresh;/* agressive mode switch thresh */ 282 u_int wme_hipri_switch_hysteresis;/* agressive mode switch hysteresis */ 283 284 struct wmeParams wme_params[4]; /* from assoc resp for each AC*/ 285 struct chanAccParams wme_wmeChanParams; /* WME params applied to self */ 286 struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */ 287 struct chanAccParams wme_chanParams; /* params applied to self */ 288 struct chanAccParams wme_bssChanParams; /* params bcast to stations */ 289 290 int (*wme_update)(struct ieee80211com *); 291 }; 292 293 void ieee80211_wme_initparams(struct ieee80211vap *); 294 void ieee80211_wme_updateparams(struct ieee80211vap *); 295 void ieee80211_wme_updateparams_locked(struct ieee80211vap *); 296 297 /* 298 * Return the WME TID from a QoS frame. If no TID 299 * is present return the index for the "non-QoS" entry. 300 */ 301 static __inline uint8_t 302 ieee80211_gettid(const struct ieee80211_frame *wh) 303 { 304 uint8_t tid; 305 306 if (IEEE80211_QOS_HAS_SEQ(wh)) { 307 if (IEEE80211_IS_DSTODS(wh)) 308 tid = ((const struct ieee80211_qosframe_addr4 *)wh)-> 309 i_qos[0]; 310 else 311 tid = ((const struct ieee80211_qosframe *)wh)->i_qos[0]; 312 tid &= IEEE80211_QOS_TID; 313 } else 314 tid = IEEE80211_NONQOS_TID; 315 return tid; 316 } 317 318 void ieee80211_waitfor_parent(struct ieee80211com *); 319 void ieee80211_start_locked(struct ieee80211vap *); 320 void ieee80211_init(void *); 321 void ieee80211_start_all(struct ieee80211com *); 322 void ieee80211_stop_locked(struct ieee80211vap *); 323 void ieee80211_stop(struct ieee80211vap *); 324 void ieee80211_stop_all(struct ieee80211com *); 325 void ieee80211_suspend_all(struct ieee80211com *); 326 void ieee80211_resume_all(struct ieee80211com *); 327 void ieee80211_restart_all(struct ieee80211com *); 328 void ieee80211_dturbo_switch(struct ieee80211vap *, int newflags); 329 void ieee80211_swbmiss(void *arg); 330 void ieee80211_beacon_miss(struct ieee80211com *); 331 int ieee80211_new_state(struct ieee80211vap *, enum ieee80211_state, int); 332 int ieee80211_new_state_locked(struct ieee80211vap *, enum ieee80211_state, 333 int); 334 void ieee80211_print_essid(const uint8_t *, int); 335 void ieee80211_dump_pkt(struct ieee80211com *, 336 const uint8_t *, int, int, int); 337 338 extern const char *ieee80211_opmode_name[]; 339 extern const char *ieee80211_state_name[IEEE80211_S_MAX]; 340 extern const char *ieee80211_wme_acnames[]; 341 342 /* 343 * Beacon frames constructed by ieee80211_beacon_alloc 344 * have the following structure filled in so drivers 345 * can update the frame later w/ minimal overhead. 346 */ 347 struct ieee80211_beacon_offsets { 348 uint8_t bo_flags[4]; /* update/state flags */ 349 uint16_t *bo_caps; /* capabilities */ 350 uint8_t *bo_cfp; /* start of CFParms element */ 351 uint8_t *bo_tim; /* start of atim/dtim */ 352 uint8_t *bo_wme; /* start of WME parameters */ 353 uint8_t *bo_tdma; /* start of TDMA parameters */ 354 uint8_t *bo_tim_trailer;/* start of fixed-size trailer */ 355 uint16_t bo_tim_len; /* atim/dtim length in bytes */ 356 uint16_t bo_tim_trailer_len;/* tim trailer length in bytes */ 357 uint8_t *bo_erp; /* start of ERP element */ 358 uint8_t *bo_htinfo; /* start of HT info element */ 359 uint8_t *bo_ath; /* start of ATH parameters */ 360 uint8_t *bo_appie; /* start of AppIE element */ 361 uint16_t bo_appie_len; /* AppIE length in bytes */ 362 uint16_t bo_csa_trailer_len; 363 uint8_t *bo_csa; /* start of CSA element */ 364 uint8_t *bo_quiet; /* start of Quiet element */ 365 uint8_t *bo_meshconf; /* start of MESHCONF element */ 366 uint8_t *bo_spare[3]; 367 }; 368 struct mbuf *ieee80211_beacon_alloc(struct ieee80211_node *); 369 370 /* 371 * Beacon frame updates are signaled through calls to iv_update_beacon 372 * with one of the IEEE80211_BEACON_* tokens defined below. For devices 373 * that construct beacon frames on the host this can trigger a rebuild 374 * or defer the processing. For devices that offload beacon frame 375 * handling this callback can be used to signal a rebuild. The bo_flags 376 * array in the ieee80211_beacon_offsets structure is intended to record 377 * deferred processing requirements; ieee80211_beacon_update uses the 378 * state to optimize work. Since this structure is owned by the driver 379 * and not visible to the 802.11 layer drivers must supply an iv_update_beacon 380 * callback that marks the flag bits and schedules (as necessary) an update. 381 */ 382 enum { 383 IEEE80211_BEACON_CAPS = 0, /* capabilities */ 384 IEEE80211_BEACON_TIM = 1, /* DTIM/ATIM */ 385 IEEE80211_BEACON_WME = 2, 386 IEEE80211_BEACON_ERP = 3, /* Extended Rate Phy */ 387 IEEE80211_BEACON_HTINFO = 4, /* HT Information */ 388 IEEE80211_BEACON_APPIE = 5, /* Application IE's */ 389 IEEE80211_BEACON_CFP = 6, /* CFParms */ 390 IEEE80211_BEACON_CSA = 7, /* Channel Switch Announcement */ 391 IEEE80211_BEACON_TDMA = 9, /* TDMA Info */ 392 IEEE80211_BEACON_ATH = 10, /* ATH parameters */ 393 IEEE80211_BEACON_MESHCONF = 11, /* Mesh Configuration */ 394 }; 395 int ieee80211_beacon_update(struct ieee80211_node *, 396 struct mbuf *, int mcast); 397 398 void ieee80211_csa_startswitch(struct ieee80211com *, 399 struct ieee80211_channel *, int mode, int count); 400 void ieee80211_csa_completeswitch(struct ieee80211com *); 401 void ieee80211_csa_cancelswitch(struct ieee80211com *); 402 void ieee80211_cac_completeswitch(struct ieee80211vap *); 403 404 /* 405 * Notification methods called from the 802.11 state machine. 406 * Note that while these are defined here, their implementation 407 * is OS-specific. 408 */ 409 void ieee80211_notify_node_join(struct ieee80211_node *, int newassoc); 410 void ieee80211_notify_node_leave(struct ieee80211_node *); 411 void ieee80211_notify_scan_done(struct ieee80211vap *); 412 void ieee80211_notify_wds_discover(struct ieee80211_node *); 413 void ieee80211_notify_csa(struct ieee80211com *, 414 const struct ieee80211_channel *, int mode, int count); 415 void ieee80211_notify_radar(struct ieee80211com *, 416 const struct ieee80211_channel *); 417 enum ieee80211_notify_cac_event { 418 IEEE80211_NOTIFY_CAC_START = 0, /* CAC timer started */ 419 IEEE80211_NOTIFY_CAC_STOP = 1, /* CAC intentionally stopped */ 420 IEEE80211_NOTIFY_CAC_RADAR = 2, /* CAC stopped due to radar detectio */ 421 IEEE80211_NOTIFY_CAC_EXPIRE = 3, /* CAC expired w/o radar */ 422 }; 423 void ieee80211_notify_cac(struct ieee80211com *, 424 const struct ieee80211_channel *, 425 enum ieee80211_notify_cac_event); 426 void ieee80211_notify_node_deauth(struct ieee80211_node *); 427 void ieee80211_notify_node_auth(struct ieee80211_node *); 428 void ieee80211_notify_country(struct ieee80211vap *, const uint8_t [], 429 const uint8_t cc[2]); 430 void ieee80211_notify_radio(struct ieee80211com *, int); 431 #endif /* _NET80211_IEEE80211_PROTO_H_ */ 432