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 EVENT_PORT_AUTHORIZED, 221 }; 222 223 struct cfg80211_event { 224 struct list_head list; 225 enum cfg80211_event_type type; 226 227 union { 228 struct cfg80211_connect_resp_params cr; 229 struct cfg80211_roam_info rm; 230 struct { 231 const u8 *ie; 232 size_t ie_len; 233 u16 reason; 234 bool locally_generated; 235 } dc; 236 struct { 237 u8 bssid[ETH_ALEN]; 238 struct ieee80211_channel *channel; 239 } ij; 240 struct { 241 u8 bssid[ETH_ALEN]; 242 } pa; 243 }; 244 }; 245 246 struct cfg80211_cached_keys { 247 struct key_params params[CFG80211_MAX_WEP_KEYS]; 248 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 249 int def; 250 }; 251 252 enum cfg80211_chan_mode { 253 CHAN_MODE_UNDEFINED, 254 CHAN_MODE_SHARED, 255 CHAN_MODE_EXCLUSIVE, 256 }; 257 258 struct cfg80211_beacon_registration { 259 struct list_head list; 260 u32 nlportid; 261 }; 262 263 struct cfg80211_cqm_config { 264 u32 rssi_hyst; 265 s32 last_rssi_event_value; 266 int n_rssi_thresholds; 267 s32 rssi_thresholds[0]; 268 }; 269 270 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 271 272 /* free object */ 273 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 274 275 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 276 char *newname); 277 278 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 279 280 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 281 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 282 unsigned long age_secs); 283 284 /* IBSS */ 285 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 286 struct net_device *dev, 287 struct cfg80211_ibss_params *params, 288 struct cfg80211_cached_keys *connkeys); 289 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 290 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 291 struct net_device *dev, bool nowext); 292 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 293 struct net_device *dev, bool nowext); 294 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 295 struct ieee80211_channel *channel); 296 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 297 struct wireless_dev *wdev); 298 299 /* mesh */ 300 extern const struct mesh_config default_mesh_config; 301 extern const struct mesh_setup default_mesh_setup; 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_join_mesh(struct cfg80211_registered_device *rdev, 307 struct net_device *dev, 308 struct mesh_setup *setup, 309 const struct mesh_config *conf); 310 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 311 struct net_device *dev); 312 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 313 struct net_device *dev); 314 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 315 struct wireless_dev *wdev, 316 struct cfg80211_chan_def *chandef); 317 318 /* OCB */ 319 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 320 struct net_device *dev, 321 struct ocb_setup *setup); 322 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 323 struct net_device *dev, 324 struct ocb_setup *setup); 325 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 326 struct net_device *dev); 327 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 328 struct net_device *dev); 329 330 /* AP */ 331 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 332 struct net_device *dev, bool notify); 333 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 334 struct net_device *dev, bool notify); 335 336 /* MLME */ 337 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 338 struct net_device *dev, 339 struct ieee80211_channel *chan, 340 enum nl80211_auth_type auth_type, 341 const u8 *bssid, 342 const u8 *ssid, int ssid_len, 343 const u8 *ie, int ie_len, 344 const u8 *key, int key_len, int key_idx, 345 const u8 *auth_data, int auth_data_len); 346 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 347 struct net_device *dev, 348 struct ieee80211_channel *chan, 349 const u8 *bssid, 350 const u8 *ssid, int ssid_len, 351 struct cfg80211_assoc_request *req); 352 int cfg80211_mlme_deauth(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 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 357 struct net_device *dev, const u8 *bssid, 358 const u8 *ie, int ie_len, u16 reason, 359 bool local_state_change); 360 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 361 struct net_device *dev); 362 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 363 u16 frame_type, const u8 *match_data, 364 int match_len); 365 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 366 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 367 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 368 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 369 struct wireless_dev *wdev, 370 struct cfg80211_mgmt_tx_params *params, 371 u64 *cookie); 372 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 373 const struct ieee80211_ht_cap *ht_capa_mask); 374 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 375 const struct ieee80211_vht_cap *vht_capa_mask); 376 377 /* SME events */ 378 int cfg80211_connect(struct cfg80211_registered_device *rdev, 379 struct net_device *dev, 380 struct cfg80211_connect_params *connect, 381 struct cfg80211_cached_keys *connkeys, 382 const u8 *prev_bssid); 383 void __cfg80211_connect_result(struct net_device *dev, 384 struct cfg80211_connect_resp_params *params, 385 bool wextev); 386 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 387 size_t ie_len, u16 reason, bool from_ap); 388 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 389 struct net_device *dev, u16 reason, 390 bool wextev); 391 void __cfg80211_roamed(struct wireless_dev *wdev, 392 struct cfg80211_roam_info *info); 393 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 394 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 395 struct wireless_dev *wdev); 396 void cfg80211_autodisconnect_wk(struct work_struct *work); 397 398 /* SME implementation */ 399 void cfg80211_conn_work(struct work_struct *work); 400 void cfg80211_sme_scan_done(struct net_device *dev); 401 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 402 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 403 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 404 void cfg80211_sme_deauth(struct wireless_dev *wdev); 405 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 406 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 407 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 408 409 /* internal helpers */ 410 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 411 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 412 struct key_params *params, int key_idx, 413 bool pairwise, const u8 *mac_addr); 414 void __cfg80211_scan_done(struct work_struct *wk); 415 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 416 bool send_message); 417 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 418 struct cfg80211_sched_scan_request *req); 419 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 420 bool want_multi); 421 void cfg80211_sched_scan_results_wk(struct work_struct *work); 422 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 423 struct cfg80211_sched_scan_request *req, 424 bool driver_initiated); 425 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 426 u64 reqid, bool driver_initiated); 427 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 428 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 429 struct net_device *dev, enum nl80211_iftype ntype, 430 struct vif_params *params); 431 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 432 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 433 434 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 435 u32 center_freq_khz, u32 bw_khz); 436 437 /** 438 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 439 * @wiphy: the wiphy to validate against 440 * @chandef: the channel definition to check 441 * 442 * Checks if chandef is usable and we can/need start CAC on such channel. 443 * 444 * Return: Return true if all channels available and at least 445 * one channel require CAC (NL80211_DFS_USABLE) 446 */ 447 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 448 const struct cfg80211_chan_def *chandef); 449 450 void cfg80211_set_dfs_state(struct wiphy *wiphy, 451 const struct cfg80211_chan_def *chandef, 452 enum nl80211_dfs_state dfs_state); 453 454 void cfg80211_dfs_channels_update_work(struct work_struct *work); 455 456 unsigned int 457 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 458 const struct cfg80211_chan_def *chandef); 459 460 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 461 462 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 463 struct ieee80211_channel *chan); 464 465 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 466 467 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 468 struct ieee80211_channel *chan); 469 470 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 471 { 472 unsigned long end = jiffies; 473 474 if (end >= start) 475 return jiffies_to_msecs(end - start); 476 477 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 478 } 479 480 void 481 cfg80211_get_chan_state(struct wireless_dev *wdev, 482 struct ieee80211_channel **chan, 483 enum cfg80211_chan_mode *chanmode, 484 u8 *radar_detect); 485 486 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 487 struct cfg80211_chan_def *chandef); 488 489 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 490 const u8 *rates, unsigned int n_rates, 491 u32 *mask); 492 493 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 494 enum nl80211_iftype iftype, u32 beacon_int); 495 496 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 497 enum nl80211_iftype iftype, int num); 498 499 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 500 struct wireless_dev *wdev); 501 void cfg80211_leave(struct cfg80211_registered_device *rdev, 502 struct wireless_dev *wdev); 503 504 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 505 struct wireless_dev *wdev); 506 507 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 508 struct wireless_dev *wdev); 509 510 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 511 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 512 #else 513 /* 514 * Trick to enable using it as a condition, 515 * and also not give a warning when it's 516 * not used that way. 517 */ 518 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 519 #endif 520 521 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 522 523 #endif /* __NET_WIRELESS_CORE_H */ 524