1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Wireless configuration interface internals. 4 * 5 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 6 */ 7 #ifndef __NET_WIRELESS_CORE_H 8 #define __NET_WIRELESS_CORE_H 9 #include <linux/list.h> 10 #include <linux/netdevice.h> 11 #include <linux/rbtree.h> 12 #include <linux/debugfs.h> 13 #include <linux/rfkill.h> 14 #include <linux/workqueue.h> 15 #include <linux/rtnetlink.h> 16 #include <net/genetlink.h> 17 #include <net/cfg80211.h> 18 #include "reg.h" 19 20 21 #define WIPHY_IDX_INVALID -1 22 23 struct cfg80211_registered_device { 24 const struct cfg80211_ops *ops; 25 struct list_head list; 26 27 /* rfkill support */ 28 struct rfkill_ops rfkill_ops; 29 struct rfkill *rfkill; 30 struct work_struct rfkill_sync; 31 32 /* ISO / IEC 3166 alpha2 for which this device is receiving 33 * country IEs on, this can help disregard country IEs from APs 34 * on the same alpha2 quickly. The alpha2 may differ from 35 * cfg80211_regdomain's alpha2 when an intersection has occurred. 36 * If the AP is reconfigured this can also be used to tell us if 37 * the country on the country IE changed. */ 38 char country_ie_alpha2[2]; 39 40 /* 41 * the driver requests the regulatory core to set this regulatory 42 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED 43 * devices using the regulatory_set_wiphy_regd() API 44 */ 45 const struct ieee80211_regdomain *requested_regd; 46 47 /* If a Country IE has been received this tells us the environment 48 * which its telling us its in. This defaults to ENVIRON_ANY */ 49 enum environment_cap env; 50 51 /* wiphy index, internal only */ 52 int wiphy_idx; 53 54 /* protected by RTNL */ 55 int devlist_generation, wdev_id; 56 int opencount; 57 wait_queue_head_t dev_wait; 58 59 struct list_head beacon_registrations; 60 spinlock_t beacon_registrations_lock; 61 62 struct list_head mlme_unreg; 63 spinlock_t mlme_unreg_lock; 64 struct work_struct mlme_unreg_wk; 65 66 /* protected by RTNL only */ 67 int num_running_ifaces; 68 int num_running_monitor_ifaces; 69 70 /* BSSes/scanning */ 71 spinlock_t bss_lock; 72 struct list_head bss_list; 73 struct rb_root bss_tree; 74 u32 bss_generation; 75 u32 bss_entries; 76 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 77 struct sk_buff *scan_msg; 78 struct list_head sched_scan_req_list; 79 unsigned long suspend_at; 80 struct work_struct scan_done_wk; 81 82 struct genl_info *cur_cmd_info; 83 84 struct work_struct conn_work; 85 struct work_struct event_work; 86 87 struct delayed_work dfs_update_channels_wk; 88 89 /* netlink port which started critical protocol (0 means not started) */ 90 u32 crit_proto_nlportid; 91 92 struct cfg80211_coalesce *coalesce; 93 94 struct work_struct destroy_work; 95 struct work_struct sched_scan_stop_wk; 96 struct work_struct sched_scan_res_wk; 97 98 struct cfg80211_chan_def radar_chandef; 99 struct work_struct propagate_radar_detect_wk; 100 101 struct cfg80211_chan_def cac_done_chandef; 102 struct work_struct propagate_cac_done_wk; 103 104 /* must be last because of the way we do wiphy_priv(), 105 * and it should at least be aligned to NETDEV_ALIGN */ 106 struct wiphy wiphy __aligned(NETDEV_ALIGN); 107 }; 108 109 static inline 110 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 111 { 112 BUG_ON(!wiphy); 113 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 114 } 115 116 static inline void 117 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 118 { 119 #ifdef CONFIG_PM 120 int i; 121 122 if (!rdev->wiphy.wowlan_config) 123 return; 124 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 125 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 126 kfree(rdev->wiphy.wowlan_config->patterns); 127 if (rdev->wiphy.wowlan_config->tcp && 128 rdev->wiphy.wowlan_config->tcp->sock) 129 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 130 kfree(rdev->wiphy.wowlan_config->tcp); 131 kfree(rdev->wiphy.wowlan_config->nd_config); 132 kfree(rdev->wiphy.wowlan_config); 133 #endif 134 } 135 136 extern struct workqueue_struct *cfg80211_wq; 137 extern struct list_head cfg80211_rdev_list; 138 extern int cfg80211_rdev_list_generation; 139 140 struct cfg80211_internal_bss { 141 struct list_head list; 142 struct list_head hidden_list; 143 struct rb_node rbn; 144 u64 ts_boottime; 145 unsigned long ts; 146 unsigned long refcount; 147 atomic_t hold; 148 149 /* time at the start of the reception of the first octet of the 150 * timestamp field of the last beacon/probe received for this BSS. 151 * The time is the TSF of the BSS specified by %parent_bssid. 152 */ 153 u64 parent_tsf; 154 155 /* the BSS according to which %parent_tsf is set. This is set to 156 * the BSS that the interface that requested the scan was connected to 157 * when the beacon/probe was received. 158 */ 159 u8 parent_bssid[ETH_ALEN] __aligned(2); 160 161 /* must be last because of priv member */ 162 struct cfg80211_bss pub; 163 }; 164 165 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 166 { 167 return container_of(pub, struct cfg80211_internal_bss, pub); 168 } 169 170 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 171 { 172 atomic_inc(&bss->hold); 173 } 174 175 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 176 { 177 int r = atomic_dec_return(&bss->hold); 178 WARN_ON(r < 0); 179 } 180 181 182 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 183 int get_wiphy_idx(struct wiphy *wiphy); 184 185 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 186 187 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 188 struct net *net); 189 190 static inline void wdev_lock(struct wireless_dev *wdev) 191 __acquires(wdev) 192 { 193 mutex_lock(&wdev->mtx); 194 __acquire(wdev->mtx); 195 } 196 197 static inline void wdev_unlock(struct wireless_dev *wdev) 198 __releases(wdev) 199 { 200 __release(wdev->mtx); 201 mutex_unlock(&wdev->mtx); 202 } 203 204 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 205 206 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 207 { 208 ASSERT_RTNL(); 209 210 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 211 rdev->num_running_ifaces > 0; 212 } 213 214 enum cfg80211_event_type { 215 EVENT_CONNECT_RESULT, 216 EVENT_ROAMED, 217 EVENT_DISCONNECTED, 218 EVENT_IBSS_JOINED, 219 EVENT_STOPPED, 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 }; 240 }; 241 242 struct cfg80211_cached_keys { 243 struct key_params params[CFG80211_MAX_WEP_KEYS]; 244 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 245 int def; 246 }; 247 248 enum cfg80211_chan_mode { 249 CHAN_MODE_UNDEFINED, 250 CHAN_MODE_SHARED, 251 CHAN_MODE_EXCLUSIVE, 252 }; 253 254 struct cfg80211_beacon_registration { 255 struct list_head list; 256 u32 nlportid; 257 }; 258 259 struct cfg80211_cqm_config { 260 u32 rssi_hyst; 261 s32 last_rssi_event_value; 262 int n_rssi_thresholds; 263 s32 rssi_thresholds[0]; 264 }; 265 266 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 267 268 /* free object */ 269 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 270 271 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 272 char *newname); 273 274 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 275 276 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 277 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 278 unsigned long age_secs); 279 280 /* IBSS */ 281 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 282 struct net_device *dev, 283 struct cfg80211_ibss_params *params, 284 struct cfg80211_cached_keys *connkeys); 285 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 286 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 287 struct net_device *dev, bool nowext); 288 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 289 struct net_device *dev, bool nowext); 290 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 291 struct ieee80211_channel *channel); 292 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 293 struct wireless_dev *wdev); 294 295 /* mesh */ 296 extern const struct mesh_config default_mesh_config; 297 extern const struct mesh_setup default_mesh_setup; 298 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 299 struct net_device *dev, 300 struct mesh_setup *setup, 301 const struct mesh_config *conf); 302 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 303 struct net_device *dev, 304 struct mesh_setup *setup, 305 const struct mesh_config *conf); 306 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 307 struct net_device *dev); 308 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 309 struct net_device *dev); 310 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 311 struct wireless_dev *wdev, 312 struct cfg80211_chan_def *chandef); 313 314 /* OCB */ 315 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 316 struct net_device *dev, 317 struct ocb_setup *setup); 318 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 319 struct net_device *dev, 320 struct ocb_setup *setup); 321 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 322 struct net_device *dev); 323 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 324 struct net_device *dev); 325 326 /* AP */ 327 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 328 struct net_device *dev, bool notify); 329 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 330 struct net_device *dev, bool notify); 331 332 /* MLME */ 333 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 334 struct net_device *dev, 335 struct ieee80211_channel *chan, 336 enum nl80211_auth_type auth_type, 337 const u8 *bssid, 338 const u8 *ssid, int ssid_len, 339 const u8 *ie, int ie_len, 340 const u8 *key, int key_len, int key_idx, 341 const u8 *auth_data, int auth_data_len); 342 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 343 struct net_device *dev, 344 struct ieee80211_channel *chan, 345 const u8 *bssid, 346 const u8 *ssid, int ssid_len, 347 struct cfg80211_assoc_request *req); 348 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 349 struct net_device *dev, const u8 *bssid, 350 const u8 *ie, int ie_len, u16 reason, 351 bool local_state_change); 352 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 353 struct net_device *dev, const u8 *bssid, 354 const u8 *ie, int ie_len, u16 reason, 355 bool local_state_change); 356 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 357 struct net_device *dev); 358 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 359 u16 frame_type, const u8 *match_data, 360 int match_len); 361 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 362 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 363 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 364 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 365 struct wireless_dev *wdev, 366 struct cfg80211_mgmt_tx_params *params, 367 u64 *cookie); 368 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 369 const struct ieee80211_ht_cap *ht_capa_mask); 370 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 371 const struct ieee80211_vht_cap *vht_capa_mask); 372 373 /* SME events */ 374 int cfg80211_connect(struct cfg80211_registered_device *rdev, 375 struct net_device *dev, 376 struct cfg80211_connect_params *connect, 377 struct cfg80211_cached_keys *connkeys, 378 const u8 *prev_bssid); 379 void __cfg80211_connect_result(struct net_device *dev, 380 struct cfg80211_connect_resp_params *params, 381 bool wextev); 382 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 383 size_t ie_len, u16 reason, bool from_ap); 384 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 385 struct net_device *dev, u16 reason, 386 bool wextev); 387 void __cfg80211_roamed(struct wireless_dev *wdev, 388 struct cfg80211_roam_info *info); 389 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 390 struct wireless_dev *wdev); 391 void cfg80211_autodisconnect_wk(struct work_struct *work); 392 393 /* SME implementation */ 394 void cfg80211_conn_work(struct work_struct *work); 395 void cfg80211_sme_scan_done(struct net_device *dev); 396 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 397 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 398 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 399 void cfg80211_sme_deauth(struct wireless_dev *wdev); 400 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 401 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 402 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 403 404 /* internal helpers */ 405 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 406 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 407 struct key_params *params, int key_idx, 408 bool pairwise, const u8 *mac_addr); 409 void __cfg80211_scan_done(struct work_struct *wk); 410 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 411 bool send_message); 412 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 413 struct cfg80211_sched_scan_request *req); 414 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 415 bool want_multi); 416 void cfg80211_sched_scan_results_wk(struct work_struct *work); 417 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 418 struct cfg80211_sched_scan_request *req, 419 bool driver_initiated); 420 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 421 u64 reqid, bool driver_initiated); 422 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 423 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 424 struct net_device *dev, enum nl80211_iftype ntype, 425 struct vif_params *params); 426 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 427 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 428 429 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 430 u32 center_freq_khz, u32 bw_khz); 431 432 /** 433 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 434 * @wiphy: the wiphy to validate against 435 * @chandef: the channel definition to check 436 * 437 * Checks if chandef is usable and we can/need start CAC on such channel. 438 * 439 * Return: Return true if all channels available and at least 440 * one channel require CAC (NL80211_DFS_USABLE) 441 */ 442 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 443 const struct cfg80211_chan_def *chandef); 444 445 void cfg80211_set_dfs_state(struct wiphy *wiphy, 446 const struct cfg80211_chan_def *chandef, 447 enum nl80211_dfs_state dfs_state); 448 449 void cfg80211_dfs_channels_update_work(struct work_struct *work); 450 451 unsigned int 452 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 453 const struct cfg80211_chan_def *chandef); 454 455 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 456 457 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 458 struct ieee80211_channel *chan); 459 460 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 461 462 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 463 struct ieee80211_channel *chan); 464 465 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 466 { 467 unsigned long end = jiffies; 468 469 if (end >= start) 470 return jiffies_to_msecs(end - start); 471 472 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 473 } 474 475 void 476 cfg80211_get_chan_state(struct wireless_dev *wdev, 477 struct ieee80211_channel **chan, 478 enum cfg80211_chan_mode *chanmode, 479 u8 *radar_detect); 480 481 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 482 struct cfg80211_chan_def *chandef); 483 484 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 485 const u8 *rates, unsigned int n_rates, 486 u32 *mask); 487 488 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 489 enum nl80211_iftype iftype, u32 beacon_int); 490 491 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 492 enum nl80211_iftype iftype, int num); 493 494 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 495 struct wireless_dev *wdev); 496 void cfg80211_leave(struct cfg80211_registered_device *rdev, 497 struct wireless_dev *wdev); 498 499 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 500 struct wireless_dev *wdev); 501 502 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 503 struct wireless_dev *wdev); 504 505 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 506 507 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 508 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 509 #else 510 /* 511 * Trick to enable using it as a condition, 512 * and also not give a warning when it's 513 * not used that way. 514 */ 515 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 516 #endif 517 518 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 519 520 #endif /* __NET_WIRELESS_CORE_H */ 521