1 /* 2 * Wireless configuration interface internals. 3 * 4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 5 */ 6 #ifndef __NET_WIRELESS_CORE_H 7 #define __NET_WIRELESS_CORE_H 8 #include <linux/list.h> 9 #include <linux/netdevice.h> 10 #include <linux/rbtree.h> 11 #include <linux/debugfs.h> 12 #include <linux/rfkill.h> 13 #include <linux/workqueue.h> 14 #include <linux/rtnetlink.h> 15 #include <net/genetlink.h> 16 #include <net/cfg80211.h> 17 #include "reg.h" 18 19 20 #define WIPHY_IDX_INVALID -1 21 22 struct cfg80211_registered_device { 23 const struct cfg80211_ops *ops; 24 struct list_head list; 25 26 /* rfkill support */ 27 struct rfkill_ops rfkill_ops; 28 struct rfkill *rfkill; 29 struct work_struct rfkill_sync; 30 31 /* ISO / IEC 3166 alpha2 for which this device is receiving 32 * country IEs on, this can help disregard country IEs from APs 33 * on the same alpha2 quickly. The alpha2 may differ from 34 * cfg80211_regdomain's alpha2 when an intersection has occurred. 35 * If the AP is reconfigured this can also be used to tell us if 36 * the country on the country IE changed. */ 37 char country_ie_alpha2[2]; 38 39 /* 40 * the driver requests the regulatory core to set this regulatory 41 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED 42 * devices using the regulatory_set_wiphy_regd() API 43 */ 44 const struct ieee80211_regdomain *requested_regd; 45 46 /* If a Country IE has been received this tells us the environment 47 * which its telling us its in. This defaults to ENVIRON_ANY */ 48 enum environment_cap env; 49 50 /* wiphy index, internal only */ 51 int wiphy_idx; 52 53 /* protected by RTNL */ 54 int devlist_generation, wdev_id; 55 int opencount; 56 wait_queue_head_t dev_wait; 57 58 struct list_head beacon_registrations; 59 spinlock_t beacon_registrations_lock; 60 61 struct list_head mlme_unreg; 62 spinlock_t mlme_unreg_lock; 63 struct work_struct mlme_unreg_wk; 64 65 /* protected by RTNL only */ 66 int num_running_ifaces; 67 int num_running_monitor_ifaces; 68 69 /* BSSes/scanning */ 70 spinlock_t bss_lock; 71 struct list_head bss_list; 72 struct rb_root bss_tree; 73 u32 bss_generation; 74 u32 bss_entries; 75 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 76 struct sk_buff *scan_msg; 77 struct list_head sched_scan_req_list; 78 unsigned long suspend_at; 79 struct work_struct scan_done_wk; 80 81 struct genl_info *cur_cmd_info; 82 83 struct work_struct conn_work; 84 struct work_struct event_work; 85 86 struct delayed_work dfs_update_channels_wk; 87 88 /* netlink port which started critical protocol (0 means not started) */ 89 u32 crit_proto_nlportid; 90 91 struct cfg80211_coalesce *coalesce; 92 93 struct work_struct destroy_work; 94 struct work_struct sched_scan_stop_wk; 95 struct work_struct sched_scan_res_wk; 96 97 struct cfg80211_chan_def radar_chandef; 98 struct work_struct propagate_radar_detect_wk; 99 100 struct cfg80211_chan_def cac_done_chandef; 101 struct work_struct propagate_cac_done_wk; 102 103 /* must be last because of the way we do wiphy_priv(), 104 * and it should at least be aligned to NETDEV_ALIGN */ 105 struct wiphy wiphy __aligned(NETDEV_ALIGN); 106 }; 107 108 static inline 109 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 110 { 111 BUG_ON(!wiphy); 112 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 113 } 114 115 static inline void 116 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 117 { 118 #ifdef CONFIG_PM 119 int i; 120 121 if (!rdev->wiphy.wowlan_config) 122 return; 123 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 124 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 125 kfree(rdev->wiphy.wowlan_config->patterns); 126 if (rdev->wiphy.wowlan_config->tcp && 127 rdev->wiphy.wowlan_config->tcp->sock) 128 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 129 kfree(rdev->wiphy.wowlan_config->tcp); 130 kfree(rdev->wiphy.wowlan_config->nd_config); 131 kfree(rdev->wiphy.wowlan_config); 132 #endif 133 } 134 135 extern struct workqueue_struct *cfg80211_wq; 136 extern struct list_head cfg80211_rdev_list; 137 extern int cfg80211_rdev_list_generation; 138 139 struct cfg80211_internal_bss { 140 struct list_head list; 141 struct list_head hidden_list; 142 struct rb_node rbn; 143 u64 ts_boottime; 144 unsigned long ts; 145 unsigned long refcount; 146 atomic_t hold; 147 148 /* time at the start of the reception of the first octet of the 149 * timestamp field of the last beacon/probe received for this BSS. 150 * The time is the TSF of the BSS specified by %parent_bssid. 151 */ 152 u64 parent_tsf; 153 154 /* the BSS according to which %parent_tsf is set. This is set to 155 * the BSS that the interface that requested the scan was connected to 156 * when the beacon/probe was received. 157 */ 158 u8 parent_bssid[ETH_ALEN] __aligned(2); 159 160 /* must be last because of priv member */ 161 struct cfg80211_bss pub; 162 }; 163 164 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 165 { 166 return container_of(pub, struct cfg80211_internal_bss, pub); 167 } 168 169 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 170 { 171 atomic_inc(&bss->hold); 172 } 173 174 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 175 { 176 int r = atomic_dec_return(&bss->hold); 177 WARN_ON(r < 0); 178 } 179 180 181 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 182 int get_wiphy_idx(struct wiphy *wiphy); 183 184 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 185 186 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 187 struct net *net); 188 189 static inline void wdev_lock(struct wireless_dev *wdev) 190 __acquires(wdev) 191 { 192 mutex_lock(&wdev->mtx); 193 __acquire(wdev->mtx); 194 } 195 196 static inline void wdev_unlock(struct wireless_dev *wdev) 197 __releases(wdev) 198 { 199 __release(wdev->mtx); 200 mutex_unlock(&wdev->mtx); 201 } 202 203 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 204 205 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 206 { 207 ASSERT_RTNL(); 208 209 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 210 rdev->num_running_ifaces > 0; 211 } 212 213 enum cfg80211_event_type { 214 EVENT_CONNECT_RESULT, 215 EVENT_ROAMED, 216 EVENT_DISCONNECTED, 217 EVENT_IBSS_JOINED, 218 EVENT_STOPPED, 219 EVENT_PORT_AUTHORIZED, 220 }; 221 222 struct cfg80211_event { 223 struct list_head list; 224 enum cfg80211_event_type type; 225 226 union { 227 struct cfg80211_connect_resp_params cr; 228 struct cfg80211_roam_info rm; 229 struct { 230 const u8 *ie; 231 size_t ie_len; 232 u16 reason; 233 bool locally_generated; 234 } dc; 235 struct { 236 u8 bssid[ETH_ALEN]; 237 struct ieee80211_channel *channel; 238 } ij; 239 struct { 240 u8 bssid[ETH_ALEN]; 241 } pa; 242 }; 243 }; 244 245 struct cfg80211_cached_keys { 246 struct key_params params[CFG80211_MAX_WEP_KEYS]; 247 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 248 int def; 249 }; 250 251 enum cfg80211_chan_mode { 252 CHAN_MODE_UNDEFINED, 253 CHAN_MODE_SHARED, 254 CHAN_MODE_EXCLUSIVE, 255 }; 256 257 struct cfg80211_beacon_registration { 258 struct list_head list; 259 u32 nlportid; 260 }; 261 262 struct cfg80211_cqm_config { 263 u32 rssi_hyst; 264 s32 last_rssi_event_value; 265 int n_rssi_thresholds; 266 s32 rssi_thresholds[0]; 267 }; 268 269 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 270 271 /* free object */ 272 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 273 274 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 275 char *newname); 276 277 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 278 279 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 280 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 281 unsigned long age_secs); 282 283 /* IBSS */ 284 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 285 struct net_device *dev, 286 struct cfg80211_ibss_params *params, 287 struct cfg80211_cached_keys *connkeys); 288 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 289 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 290 struct net_device *dev, bool nowext); 291 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 292 struct net_device *dev, bool nowext); 293 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 294 struct ieee80211_channel *channel); 295 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 296 struct wireless_dev *wdev); 297 298 /* mesh */ 299 extern const struct mesh_config default_mesh_config; 300 extern const struct mesh_setup default_mesh_setup; 301 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 302 struct net_device *dev, 303 struct mesh_setup *setup, 304 const struct mesh_config *conf); 305 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 306 struct net_device *dev, 307 struct mesh_setup *setup, 308 const struct mesh_config *conf); 309 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 310 struct net_device *dev); 311 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 312 struct net_device *dev); 313 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 314 struct wireless_dev *wdev, 315 struct cfg80211_chan_def *chandef); 316 317 /* OCB */ 318 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 319 struct net_device *dev, 320 struct ocb_setup *setup); 321 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 322 struct net_device *dev, 323 struct ocb_setup *setup); 324 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 325 struct net_device *dev); 326 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 327 struct net_device *dev); 328 329 /* AP */ 330 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 331 struct net_device *dev, bool notify); 332 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 333 struct net_device *dev, bool notify); 334 335 /* MLME */ 336 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 337 struct net_device *dev, 338 struct ieee80211_channel *chan, 339 enum nl80211_auth_type auth_type, 340 const u8 *bssid, 341 const u8 *ssid, int ssid_len, 342 const u8 *ie, int ie_len, 343 const u8 *key, int key_len, int key_idx, 344 const u8 *auth_data, int auth_data_len); 345 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 346 struct net_device *dev, 347 struct ieee80211_channel *chan, 348 const u8 *bssid, 349 const u8 *ssid, int ssid_len, 350 struct cfg80211_assoc_request *req); 351 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 352 struct net_device *dev, const u8 *bssid, 353 const u8 *ie, int ie_len, u16 reason, 354 bool local_state_change); 355 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 356 struct net_device *dev, const u8 *bssid, 357 const u8 *ie, int ie_len, u16 reason, 358 bool local_state_change); 359 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 360 struct net_device *dev); 361 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 362 u16 frame_type, const u8 *match_data, 363 int match_len); 364 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 365 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 366 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 367 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 368 struct wireless_dev *wdev, 369 struct cfg80211_mgmt_tx_params *params, 370 u64 *cookie); 371 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 372 const struct ieee80211_ht_cap *ht_capa_mask); 373 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 374 const struct ieee80211_vht_cap *vht_capa_mask); 375 376 /* SME events */ 377 int cfg80211_connect(struct cfg80211_registered_device *rdev, 378 struct net_device *dev, 379 struct cfg80211_connect_params *connect, 380 struct cfg80211_cached_keys *connkeys, 381 const u8 *prev_bssid); 382 void __cfg80211_connect_result(struct net_device *dev, 383 struct cfg80211_connect_resp_params *params, 384 bool wextev); 385 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 386 size_t ie_len, u16 reason, bool from_ap); 387 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 388 struct net_device *dev, u16 reason, 389 bool wextev); 390 void __cfg80211_roamed(struct wireless_dev *wdev, 391 struct cfg80211_roam_info *info); 392 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 393 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 394 struct wireless_dev *wdev); 395 void cfg80211_autodisconnect_wk(struct work_struct *work); 396 397 /* SME implementation */ 398 void cfg80211_conn_work(struct work_struct *work); 399 void cfg80211_sme_scan_done(struct net_device *dev); 400 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 401 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 402 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 403 void cfg80211_sme_deauth(struct wireless_dev *wdev); 404 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 405 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 406 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 407 408 /* internal helpers */ 409 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 410 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 411 struct key_params *params, int key_idx, 412 bool pairwise, const u8 *mac_addr); 413 void __cfg80211_scan_done(struct work_struct *wk); 414 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 415 bool send_message); 416 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 417 struct cfg80211_sched_scan_request *req); 418 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 419 bool want_multi); 420 void cfg80211_sched_scan_results_wk(struct work_struct *work); 421 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 422 struct cfg80211_sched_scan_request *req, 423 bool driver_initiated); 424 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 425 u64 reqid, bool driver_initiated); 426 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 427 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 428 struct net_device *dev, enum nl80211_iftype ntype, 429 struct vif_params *params); 430 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 431 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 432 433 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 434 u32 center_freq_khz, u32 bw_khz); 435 436 /** 437 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 438 * @wiphy: the wiphy to validate against 439 * @chandef: the channel definition to check 440 * 441 * Checks if chandef is usable and we can/need start CAC on such channel. 442 * 443 * Return: Return true if all channels available and at least 444 * one channel require CAC (NL80211_DFS_USABLE) 445 */ 446 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 447 const struct cfg80211_chan_def *chandef); 448 449 void cfg80211_set_dfs_state(struct wiphy *wiphy, 450 const struct cfg80211_chan_def *chandef, 451 enum nl80211_dfs_state dfs_state); 452 453 void cfg80211_dfs_channels_update_work(struct work_struct *work); 454 455 unsigned int 456 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 457 const struct cfg80211_chan_def *chandef); 458 459 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 460 461 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 462 struct ieee80211_channel *chan); 463 464 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 465 466 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 467 struct ieee80211_channel *chan); 468 469 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 470 { 471 unsigned long end = jiffies; 472 473 if (end >= start) 474 return jiffies_to_msecs(end - start); 475 476 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 477 } 478 479 void 480 cfg80211_get_chan_state(struct wireless_dev *wdev, 481 struct ieee80211_channel **chan, 482 enum cfg80211_chan_mode *chanmode, 483 u8 *radar_detect); 484 485 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 486 struct cfg80211_chan_def *chandef); 487 488 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 489 const u8 *rates, unsigned int n_rates, 490 u32 *mask); 491 492 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 493 enum nl80211_iftype iftype, u32 beacon_int); 494 495 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 496 enum nl80211_iftype iftype, int num); 497 498 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 499 struct wireless_dev *wdev); 500 void cfg80211_leave(struct cfg80211_registered_device *rdev, 501 struct wireless_dev *wdev); 502 503 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 504 struct wireless_dev *wdev); 505 506 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 507 struct wireless_dev *wdev); 508 509 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 510 511 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 512 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 513 #else 514 /* 515 * Trick to enable using it as a condition, 516 * and also not give a warning when it's 517 * not used that way. 518 */ 519 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 520 #endif 521 522 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 523 524 #endif /* __NET_WIRELESS_CORE_H */ 525