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