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 }; 220 221 struct cfg80211_event { 222 struct list_head list; 223 enum cfg80211_event_type type; 224 225 union { 226 struct cfg80211_connect_resp_params cr; 227 struct cfg80211_roam_info rm; 228 struct { 229 const u8 *ie; 230 size_t ie_len; 231 u16 reason; 232 bool locally_generated; 233 } dc; 234 struct { 235 u8 bssid[ETH_ALEN]; 236 struct ieee80211_channel *channel; 237 } ij; 238 }; 239 }; 240 241 struct cfg80211_cached_keys { 242 struct key_params params[CFG80211_MAX_WEP_KEYS]; 243 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 244 int def; 245 }; 246 247 enum cfg80211_chan_mode { 248 CHAN_MODE_UNDEFINED, 249 CHAN_MODE_SHARED, 250 CHAN_MODE_EXCLUSIVE, 251 }; 252 253 struct cfg80211_beacon_registration { 254 struct list_head list; 255 u32 nlportid; 256 }; 257 258 struct cfg80211_cqm_config { 259 u32 rssi_hyst; 260 s32 last_rssi_event_value; 261 int n_rssi_thresholds; 262 s32 rssi_thresholds[0]; 263 }; 264 265 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 266 267 /* free object */ 268 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 269 270 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 271 char *newname); 272 273 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 274 275 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 276 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 277 unsigned long age_secs); 278 279 /* IBSS */ 280 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 281 struct net_device *dev, 282 struct cfg80211_ibss_params *params, 283 struct cfg80211_cached_keys *connkeys); 284 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 285 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 286 struct net_device *dev, bool nowext); 287 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 288 struct net_device *dev, bool nowext); 289 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 290 struct ieee80211_channel *channel); 291 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 292 struct wireless_dev *wdev); 293 294 /* mesh */ 295 extern const struct mesh_config default_mesh_config; 296 extern const struct mesh_setup default_mesh_setup; 297 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 298 struct net_device *dev, 299 struct mesh_setup *setup, 300 const struct mesh_config *conf); 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_leave_mesh(struct cfg80211_registered_device *rdev, 306 struct net_device *dev); 307 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 308 struct net_device *dev); 309 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 310 struct wireless_dev *wdev, 311 struct cfg80211_chan_def *chandef); 312 313 /* OCB */ 314 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 315 struct net_device *dev, 316 struct ocb_setup *setup); 317 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 318 struct net_device *dev, 319 struct ocb_setup *setup); 320 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 321 struct net_device *dev); 322 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 323 struct net_device *dev); 324 325 /* AP */ 326 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 327 struct net_device *dev, bool notify); 328 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 329 struct net_device *dev, bool notify); 330 331 /* MLME */ 332 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 333 struct net_device *dev, 334 struct ieee80211_channel *chan, 335 enum nl80211_auth_type auth_type, 336 const u8 *bssid, 337 const u8 *ssid, int ssid_len, 338 const u8 *ie, int ie_len, 339 const u8 *key, int key_len, int key_idx, 340 const u8 *auth_data, int auth_data_len); 341 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 342 struct net_device *dev, 343 struct ieee80211_channel *chan, 344 const u8 *bssid, 345 const u8 *ssid, int ssid_len, 346 struct cfg80211_assoc_request *req); 347 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 348 struct net_device *dev, const u8 *bssid, 349 const u8 *ie, int ie_len, u16 reason, 350 bool local_state_change); 351 int cfg80211_mlme_disassoc(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 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 356 struct net_device *dev); 357 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 358 u16 frame_type, const u8 *match_data, 359 int match_len); 360 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 361 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 362 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 363 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 364 struct wireless_dev *wdev, 365 struct cfg80211_mgmt_tx_params *params, 366 u64 *cookie); 367 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 368 const struct ieee80211_ht_cap *ht_capa_mask); 369 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 370 const struct ieee80211_vht_cap *vht_capa_mask); 371 372 /* SME events */ 373 int cfg80211_connect(struct cfg80211_registered_device *rdev, 374 struct net_device *dev, 375 struct cfg80211_connect_params *connect, 376 struct cfg80211_cached_keys *connkeys, 377 const u8 *prev_bssid); 378 void __cfg80211_connect_result(struct net_device *dev, 379 struct cfg80211_connect_resp_params *params, 380 bool wextev); 381 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 382 size_t ie_len, u16 reason, bool from_ap); 383 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 384 struct net_device *dev, u16 reason, 385 bool wextev); 386 void __cfg80211_roamed(struct wireless_dev *wdev, 387 struct cfg80211_roam_info *info); 388 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 389 struct wireless_dev *wdev); 390 void cfg80211_autodisconnect_wk(struct work_struct *work); 391 392 /* SME implementation */ 393 void cfg80211_conn_work(struct work_struct *work); 394 void cfg80211_sme_scan_done(struct net_device *dev); 395 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 396 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 397 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 398 void cfg80211_sme_deauth(struct wireless_dev *wdev); 399 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 400 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 401 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 402 403 /* internal helpers */ 404 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 405 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 406 struct key_params *params, int key_idx, 407 bool pairwise, const u8 *mac_addr); 408 void __cfg80211_scan_done(struct work_struct *wk); 409 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 410 bool send_message); 411 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 412 struct cfg80211_sched_scan_request *req); 413 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 414 bool want_multi); 415 void cfg80211_sched_scan_results_wk(struct work_struct *work); 416 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 417 struct cfg80211_sched_scan_request *req, 418 bool driver_initiated); 419 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 420 u64 reqid, bool driver_initiated); 421 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 422 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 423 struct net_device *dev, enum nl80211_iftype ntype, 424 struct vif_params *params); 425 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 426 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 427 428 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 429 u32 center_freq_khz, u32 bw_khz); 430 431 /** 432 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 433 * @wiphy: the wiphy to validate against 434 * @chandef: the channel definition to check 435 * 436 * Checks if chandef is usable and we can/need start CAC on such channel. 437 * 438 * Return: Return true if all channels available and at least 439 * one channel require CAC (NL80211_DFS_USABLE) 440 */ 441 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 442 const struct cfg80211_chan_def *chandef); 443 444 void cfg80211_set_dfs_state(struct wiphy *wiphy, 445 const struct cfg80211_chan_def *chandef, 446 enum nl80211_dfs_state dfs_state); 447 448 void cfg80211_dfs_channels_update_work(struct work_struct *work); 449 450 unsigned int 451 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 452 const struct cfg80211_chan_def *chandef); 453 454 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 455 456 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 457 struct ieee80211_channel *chan); 458 459 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 460 461 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 462 struct ieee80211_channel *chan); 463 464 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 465 { 466 unsigned long end = jiffies; 467 468 if (end >= start) 469 return jiffies_to_msecs(end - start); 470 471 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 472 } 473 474 void 475 cfg80211_get_chan_state(struct wireless_dev *wdev, 476 struct ieee80211_channel **chan, 477 enum cfg80211_chan_mode *chanmode, 478 u8 *radar_detect); 479 480 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 481 struct cfg80211_chan_def *chandef); 482 483 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 484 const u8 *rates, unsigned int n_rates, 485 u32 *mask); 486 487 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 488 enum nl80211_iftype iftype, u32 beacon_int); 489 490 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 491 enum nl80211_iftype iftype, int num); 492 493 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 494 struct wireless_dev *wdev); 495 void cfg80211_leave(struct cfg80211_registered_device *rdev, 496 struct wireless_dev *wdev); 497 498 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 499 struct wireless_dev *wdev); 500 501 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 502 struct wireless_dev *wdev); 503 504 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 505 506 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 507 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 508 #else 509 /* 510 * Trick to enable using it as a condition, 511 * and also not give a warning when it's 512 * not used that way. 513 */ 514 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 515 #endif 516 517 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 518 519 #endif /* __NET_WIRELESS_CORE_H */ 520