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 u64 cookie_counter; 70 71 /* BSSes/scanning */ 72 spinlock_t bss_lock; 73 struct list_head bss_list; 74 struct rb_root bss_tree; 75 u32 bss_generation; 76 u32 bss_entries; 77 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 78 struct sk_buff *scan_msg; 79 struct list_head sched_scan_req_list; 80 time64_t suspend_at; 81 struct work_struct scan_done_wk; 82 83 struct genl_info *cur_cmd_info; 84 85 struct work_struct conn_work; 86 struct work_struct event_work; 87 88 struct delayed_work dfs_update_channels_wk; 89 90 /* netlink port which started critical protocol (0 means not started) */ 91 u32 crit_proto_nlportid; 92 93 struct cfg80211_coalesce *coalesce; 94 95 struct work_struct destroy_work; 96 struct work_struct sched_scan_stop_wk; 97 struct work_struct sched_scan_res_wk; 98 99 struct cfg80211_chan_def radar_chandef; 100 struct work_struct propagate_radar_detect_wk; 101 102 struct cfg80211_chan_def cac_done_chandef; 103 struct work_struct propagate_cac_done_wk; 104 105 /* must be last because of the way we do wiphy_priv(), 106 * and it should at least be aligned to NETDEV_ALIGN */ 107 struct wiphy wiphy __aligned(NETDEV_ALIGN); 108 }; 109 110 static inline 111 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 112 { 113 BUG_ON(!wiphy); 114 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 115 } 116 117 static inline void 118 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 119 { 120 #ifdef CONFIG_PM 121 int i; 122 123 if (!rdev->wiphy.wowlan_config) 124 return; 125 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 126 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 127 kfree(rdev->wiphy.wowlan_config->patterns); 128 if (rdev->wiphy.wowlan_config->tcp && 129 rdev->wiphy.wowlan_config->tcp->sock) 130 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 131 kfree(rdev->wiphy.wowlan_config->tcp); 132 kfree(rdev->wiphy.wowlan_config->nd_config); 133 kfree(rdev->wiphy.wowlan_config); 134 #endif 135 } 136 137 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) 138 { 139 u64 r = ++rdev->cookie_counter; 140 141 if (WARN_ON(r == 0)) 142 r = ++rdev->cookie_counter; 143 144 return r; 145 } 146 147 extern struct workqueue_struct *cfg80211_wq; 148 extern struct list_head cfg80211_rdev_list; 149 extern int cfg80211_rdev_list_generation; 150 151 struct cfg80211_internal_bss { 152 struct list_head list; 153 struct list_head hidden_list; 154 struct rb_node rbn; 155 u64 ts_boottime; 156 unsigned long ts; 157 unsigned long refcount; 158 atomic_t hold; 159 160 /* time at the start of the reception of the first octet of the 161 * timestamp field of the last beacon/probe received for this BSS. 162 * The time is the TSF of the BSS specified by %parent_bssid. 163 */ 164 u64 parent_tsf; 165 166 /* the BSS according to which %parent_tsf is set. This is set to 167 * the BSS that the interface that requested the scan was connected to 168 * when the beacon/probe was received. 169 */ 170 u8 parent_bssid[ETH_ALEN] __aligned(2); 171 172 /* must be last because of priv member */ 173 struct cfg80211_bss pub; 174 }; 175 176 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 177 { 178 return container_of(pub, struct cfg80211_internal_bss, pub); 179 } 180 181 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 182 { 183 atomic_inc(&bss->hold); 184 } 185 186 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 187 { 188 int r = atomic_dec_return(&bss->hold); 189 WARN_ON(r < 0); 190 } 191 192 193 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 194 int get_wiphy_idx(struct wiphy *wiphy); 195 196 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 197 198 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 199 struct net *net); 200 201 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev, 202 struct wireless_dev *wdev); 203 204 static inline void wdev_lock(struct wireless_dev *wdev) 205 __acquires(wdev) 206 { 207 mutex_lock(&wdev->mtx); 208 __acquire(wdev->mtx); 209 } 210 211 static inline void wdev_unlock(struct wireless_dev *wdev) 212 __releases(wdev) 213 { 214 __release(wdev->mtx); 215 mutex_unlock(&wdev->mtx); 216 } 217 218 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 219 220 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 221 { 222 ASSERT_RTNL(); 223 224 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 225 rdev->num_running_ifaces > 0; 226 } 227 228 enum cfg80211_event_type { 229 EVENT_CONNECT_RESULT, 230 EVENT_ROAMED, 231 EVENT_DISCONNECTED, 232 EVENT_IBSS_JOINED, 233 EVENT_STOPPED, 234 EVENT_PORT_AUTHORIZED, 235 }; 236 237 struct cfg80211_event { 238 struct list_head list; 239 enum cfg80211_event_type type; 240 241 union { 242 struct cfg80211_connect_resp_params cr; 243 struct cfg80211_roam_info rm; 244 struct { 245 const u8 *ie; 246 size_t ie_len; 247 u16 reason; 248 bool locally_generated; 249 } dc; 250 struct { 251 u8 bssid[ETH_ALEN]; 252 struct ieee80211_channel *channel; 253 } ij; 254 struct { 255 u8 bssid[ETH_ALEN]; 256 } pa; 257 }; 258 }; 259 260 struct cfg80211_cached_keys { 261 struct key_params params[CFG80211_MAX_WEP_KEYS]; 262 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 263 int def; 264 }; 265 266 enum cfg80211_chan_mode { 267 CHAN_MODE_UNDEFINED, 268 CHAN_MODE_SHARED, 269 CHAN_MODE_EXCLUSIVE, 270 }; 271 272 struct cfg80211_beacon_registration { 273 struct list_head list; 274 u32 nlportid; 275 }; 276 277 struct cfg80211_cqm_config { 278 u32 rssi_hyst; 279 s32 last_rssi_event_value; 280 int n_rssi_thresholds; 281 s32 rssi_thresholds[0]; 282 }; 283 284 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 285 286 /* free object */ 287 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 288 289 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 290 char *newname); 291 292 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 293 294 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 295 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 296 unsigned long age_secs); 297 298 /* IBSS */ 299 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 300 struct net_device *dev, 301 struct cfg80211_ibss_params *params, 302 struct cfg80211_cached_keys *connkeys); 303 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 304 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 305 struct net_device *dev, bool nowext); 306 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 307 struct net_device *dev, bool nowext); 308 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 309 struct ieee80211_channel *channel); 310 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 311 struct wireless_dev *wdev); 312 313 /* mesh */ 314 extern const struct mesh_config default_mesh_config; 315 extern const struct mesh_setup default_mesh_setup; 316 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 317 struct net_device *dev, 318 struct mesh_setup *setup, 319 const struct mesh_config *conf); 320 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 321 struct net_device *dev); 322 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 323 struct net_device *dev); 324 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 325 struct wireless_dev *wdev, 326 struct cfg80211_chan_def *chandef); 327 328 /* OCB */ 329 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 330 struct net_device *dev, 331 struct ocb_setup *setup); 332 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 333 struct net_device *dev, 334 struct ocb_setup *setup); 335 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 336 struct net_device *dev); 337 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 338 struct net_device *dev); 339 340 /* AP */ 341 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 342 struct net_device *dev, bool notify); 343 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 344 struct net_device *dev, bool notify); 345 346 /* MLME */ 347 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 348 struct net_device *dev, 349 struct ieee80211_channel *chan, 350 enum nl80211_auth_type auth_type, 351 const u8 *bssid, 352 const u8 *ssid, int ssid_len, 353 const u8 *ie, int ie_len, 354 const u8 *key, int key_len, int key_idx, 355 const u8 *auth_data, int auth_data_len); 356 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 357 struct net_device *dev, 358 struct ieee80211_channel *chan, 359 const u8 *bssid, 360 const u8 *ssid, int ssid_len, 361 struct cfg80211_assoc_request *req); 362 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 363 struct net_device *dev, const u8 *bssid, 364 const u8 *ie, int ie_len, u16 reason, 365 bool local_state_change); 366 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 367 struct net_device *dev, const u8 *bssid, 368 const u8 *ie, int ie_len, u16 reason, 369 bool local_state_change); 370 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 371 struct net_device *dev); 372 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 373 u16 frame_type, const u8 *match_data, 374 int match_len); 375 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 376 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 377 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 378 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 379 struct wireless_dev *wdev, 380 struct cfg80211_mgmt_tx_params *params, 381 u64 *cookie); 382 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 383 const struct ieee80211_ht_cap *ht_capa_mask); 384 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 385 const struct ieee80211_vht_cap *vht_capa_mask); 386 387 /* SME events */ 388 int cfg80211_connect(struct cfg80211_registered_device *rdev, 389 struct net_device *dev, 390 struct cfg80211_connect_params *connect, 391 struct cfg80211_cached_keys *connkeys, 392 const u8 *prev_bssid); 393 void __cfg80211_connect_result(struct net_device *dev, 394 struct cfg80211_connect_resp_params *params, 395 bool wextev); 396 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 397 size_t ie_len, u16 reason, bool from_ap); 398 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 399 struct net_device *dev, u16 reason, 400 bool wextev); 401 void __cfg80211_roamed(struct wireless_dev *wdev, 402 struct cfg80211_roam_info *info); 403 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 404 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 405 struct wireless_dev *wdev); 406 void cfg80211_autodisconnect_wk(struct work_struct *work); 407 408 /* SME implementation */ 409 void cfg80211_conn_work(struct work_struct *work); 410 void cfg80211_sme_scan_done(struct net_device *dev); 411 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 412 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 413 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 414 void cfg80211_sme_deauth(struct wireless_dev *wdev); 415 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 416 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 417 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 418 419 /* internal helpers */ 420 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 421 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 422 struct key_params *params, int key_idx, 423 bool pairwise, const u8 *mac_addr); 424 void __cfg80211_scan_done(struct work_struct *wk); 425 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 426 bool send_message); 427 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 428 struct cfg80211_sched_scan_request *req); 429 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 430 bool want_multi); 431 void cfg80211_sched_scan_results_wk(struct work_struct *work); 432 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 433 struct cfg80211_sched_scan_request *req, 434 bool driver_initiated); 435 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 436 u64 reqid, bool driver_initiated); 437 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 438 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 439 struct net_device *dev, enum nl80211_iftype ntype, 440 struct vif_params *params); 441 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 442 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 443 444 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 445 u32 center_freq_khz, u32 bw_khz); 446 447 /** 448 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 449 * @wiphy: the wiphy to validate against 450 * @chandef: the channel definition to check 451 * 452 * Checks if chandef is usable and we can/need start CAC on such channel. 453 * 454 * Return: Return true if all channels available and at least 455 * one channel require CAC (NL80211_DFS_USABLE) 456 */ 457 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 458 const struct cfg80211_chan_def *chandef); 459 460 void cfg80211_set_dfs_state(struct wiphy *wiphy, 461 const struct cfg80211_chan_def *chandef, 462 enum nl80211_dfs_state dfs_state); 463 464 void cfg80211_dfs_channels_update_work(struct work_struct *work); 465 466 unsigned int 467 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 468 const struct cfg80211_chan_def *chandef); 469 470 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 471 472 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 473 struct ieee80211_channel *chan); 474 475 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 476 477 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 478 struct ieee80211_channel *chan); 479 480 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 481 { 482 unsigned long end = jiffies; 483 484 if (end >= start) 485 return jiffies_to_msecs(end - start); 486 487 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 488 } 489 490 void 491 cfg80211_get_chan_state(struct wireless_dev *wdev, 492 struct ieee80211_channel **chan, 493 enum cfg80211_chan_mode *chanmode, 494 u8 *radar_detect); 495 496 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 497 struct cfg80211_chan_def *chandef); 498 499 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 500 const u8 *rates, unsigned int n_rates, 501 u32 *mask); 502 503 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 504 enum nl80211_iftype iftype, u32 beacon_int); 505 506 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 507 enum nl80211_iftype iftype, int num); 508 509 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 510 struct wireless_dev *wdev); 511 void cfg80211_leave(struct cfg80211_registered_device *rdev, 512 struct wireless_dev *wdev); 513 514 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 515 struct wireless_dev *wdev); 516 517 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 518 struct wireless_dev *wdev); 519 520 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 521 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 522 #else 523 /* 524 * Trick to enable using it as a condition, 525 * and also not give a warning when it's 526 * not used that way. 527 */ 528 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 529 #endif 530 531 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 532 533 #endif /* __NET_WIRELESS_CORE_H */ 534