1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Wireless configuration interface internals. 4 * 5 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright (C) 2018 Intel Corporation 7 */ 8 #ifndef __NET_WIRELESS_CORE_H 9 #define __NET_WIRELESS_CORE_H 10 #include <linux/list.h> 11 #include <linux/netdevice.h> 12 #include <linux/rbtree.h> 13 #include <linux/debugfs.h> 14 #include <linux/rfkill.h> 15 #include <linux/workqueue.h> 16 #include <linux/rtnetlink.h> 17 #include <net/genetlink.h> 18 #include <net/cfg80211.h> 19 #include "reg.h" 20 21 22 #define WIPHY_IDX_INVALID -1 23 24 struct cfg80211_registered_device { 25 const struct cfg80211_ops *ops; 26 struct list_head list; 27 28 /* rfkill support */ 29 struct rfkill_ops rfkill_ops; 30 struct rfkill *rfkill; 31 struct work_struct rfkill_sync; 32 33 /* ISO / IEC 3166 alpha2 for which this device is receiving 34 * country IEs on, this can help disregard country IEs from APs 35 * on the same alpha2 quickly. The alpha2 may differ from 36 * cfg80211_regdomain's alpha2 when an intersection has occurred. 37 * If the AP is reconfigured this can also be used to tell us if 38 * the country on the country IE changed. */ 39 char country_ie_alpha2[2]; 40 41 /* 42 * the driver requests the regulatory core to set this regulatory 43 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED 44 * devices using the regulatory_set_wiphy_regd() API 45 */ 46 const struct ieee80211_regdomain *requested_regd; 47 48 /* If a Country IE has been received this tells us the environment 49 * which its telling us its in. This defaults to ENVIRON_ANY */ 50 enum environment_cap env; 51 52 /* wiphy index, internal only */ 53 int wiphy_idx; 54 55 /* protected by RTNL */ 56 int devlist_generation, wdev_id; 57 int opencount; 58 wait_queue_head_t dev_wait; 59 60 struct list_head beacon_registrations; 61 spinlock_t beacon_registrations_lock; 62 63 struct list_head mlme_unreg; 64 spinlock_t mlme_unreg_lock; 65 struct work_struct mlme_unreg_wk; 66 67 /* protected by RTNL only */ 68 int num_running_ifaces; 69 int num_running_monitor_ifaces; 70 u64 cookie_counter; 71 72 /* BSSes/scanning */ 73 spinlock_t bss_lock; 74 struct list_head bss_list; 75 struct rb_root bss_tree; 76 u32 bss_generation; 77 u32 bss_entries; 78 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 79 struct sk_buff *scan_msg; 80 struct list_head sched_scan_req_list; 81 time64_t suspend_at; 82 struct work_struct scan_done_wk; 83 84 struct genl_info *cur_cmd_info; 85 86 struct work_struct conn_work; 87 struct work_struct event_work; 88 89 struct delayed_work dfs_update_channels_wk; 90 91 /* netlink port which started critical protocol (0 means not started) */ 92 u32 crit_proto_nlportid; 93 94 struct cfg80211_coalesce *coalesce; 95 96 struct work_struct destroy_work; 97 struct work_struct sched_scan_stop_wk; 98 struct work_struct sched_scan_res_wk; 99 100 struct cfg80211_chan_def radar_chandef; 101 struct work_struct propagate_radar_detect_wk; 102 103 struct cfg80211_chan_def cac_done_chandef; 104 struct work_struct propagate_cac_done_wk; 105 106 /* must be last because of the way we do wiphy_priv(), 107 * and it should at least be aligned to NETDEV_ALIGN */ 108 struct wiphy wiphy __aligned(NETDEV_ALIGN); 109 }; 110 111 static inline 112 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 113 { 114 BUG_ON(!wiphy); 115 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 116 } 117 118 static inline void 119 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 120 { 121 #ifdef CONFIG_PM 122 int i; 123 124 if (!rdev->wiphy.wowlan_config) 125 return; 126 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 127 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 128 kfree(rdev->wiphy.wowlan_config->patterns); 129 if (rdev->wiphy.wowlan_config->tcp && 130 rdev->wiphy.wowlan_config->tcp->sock) 131 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 132 kfree(rdev->wiphy.wowlan_config->tcp); 133 kfree(rdev->wiphy.wowlan_config->nd_config); 134 kfree(rdev->wiphy.wowlan_config); 135 #endif 136 } 137 138 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) 139 { 140 u64 r = ++rdev->cookie_counter; 141 142 if (WARN_ON(r == 0)) 143 r = ++rdev->cookie_counter; 144 145 return r; 146 } 147 148 extern struct workqueue_struct *cfg80211_wq; 149 extern struct list_head cfg80211_rdev_list; 150 extern int cfg80211_rdev_list_generation; 151 152 struct cfg80211_internal_bss { 153 struct list_head list; 154 struct list_head hidden_list; 155 struct rb_node rbn; 156 u64 ts_boottime; 157 unsigned long ts; 158 unsigned long refcount; 159 atomic_t hold; 160 161 /* time at the start of the reception of the first octet of the 162 * timestamp field of the last beacon/probe received for this BSS. 163 * The time is the TSF of the BSS specified by %parent_bssid. 164 */ 165 u64 parent_tsf; 166 167 /* the BSS according to which %parent_tsf is set. This is set to 168 * the BSS that the interface that requested the scan was connected to 169 * when the beacon/probe was received. 170 */ 171 u8 parent_bssid[ETH_ALEN] __aligned(2); 172 173 /* must be last because of priv member */ 174 struct cfg80211_bss pub; 175 }; 176 177 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 178 { 179 return container_of(pub, struct cfg80211_internal_bss, pub); 180 } 181 182 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 183 { 184 atomic_inc(&bss->hold); 185 } 186 187 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 188 { 189 int r = atomic_dec_return(&bss->hold); 190 WARN_ON(r < 0); 191 } 192 193 194 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 195 int get_wiphy_idx(struct wiphy *wiphy); 196 197 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 198 199 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 200 struct net *net); 201 202 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev, 203 struct wireless_dev *wdev); 204 205 static inline void wdev_lock(struct wireless_dev *wdev) 206 __acquires(wdev) 207 { 208 mutex_lock(&wdev->mtx); 209 __acquire(wdev->mtx); 210 } 211 212 static inline void wdev_unlock(struct wireless_dev *wdev) 213 __releases(wdev) 214 { 215 __release(wdev->mtx); 216 mutex_unlock(&wdev->mtx); 217 } 218 219 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 220 221 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 222 { 223 ASSERT_RTNL(); 224 225 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 226 rdev->num_running_ifaces > 0; 227 } 228 229 enum cfg80211_event_type { 230 EVENT_CONNECT_RESULT, 231 EVENT_ROAMED, 232 EVENT_DISCONNECTED, 233 EVENT_IBSS_JOINED, 234 EVENT_STOPPED, 235 EVENT_PORT_AUTHORIZED, 236 }; 237 238 struct cfg80211_event { 239 struct list_head list; 240 enum cfg80211_event_type type; 241 242 union { 243 struct cfg80211_connect_resp_params cr; 244 struct cfg80211_roam_info rm; 245 struct { 246 const u8 *ie; 247 size_t ie_len; 248 u16 reason; 249 bool locally_generated; 250 } dc; 251 struct { 252 u8 bssid[ETH_ALEN]; 253 struct ieee80211_channel *channel; 254 } ij; 255 struct { 256 u8 bssid[ETH_ALEN]; 257 } pa; 258 }; 259 }; 260 261 struct cfg80211_cached_keys { 262 struct key_params params[CFG80211_MAX_WEP_KEYS]; 263 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 264 int def; 265 }; 266 267 enum cfg80211_chan_mode { 268 CHAN_MODE_UNDEFINED, 269 CHAN_MODE_SHARED, 270 CHAN_MODE_EXCLUSIVE, 271 }; 272 273 struct cfg80211_beacon_registration { 274 struct list_head list; 275 u32 nlportid; 276 }; 277 278 struct cfg80211_cqm_config { 279 u32 rssi_hyst; 280 s32 last_rssi_event_value; 281 int n_rssi_thresholds; 282 s32 rssi_thresholds[0]; 283 }; 284 285 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 286 287 /* free object */ 288 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 289 290 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 291 char *newname); 292 293 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 294 295 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 296 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 297 unsigned long age_secs); 298 299 /* IBSS */ 300 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 301 struct net_device *dev, 302 struct cfg80211_ibss_params *params, 303 struct cfg80211_cached_keys *connkeys); 304 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 305 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 306 struct net_device *dev, bool nowext); 307 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 308 struct net_device *dev, bool nowext); 309 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 310 struct ieee80211_channel *channel); 311 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 312 struct wireless_dev *wdev); 313 314 /* mesh */ 315 extern const struct mesh_config default_mesh_config; 316 extern const struct mesh_setup default_mesh_setup; 317 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 318 struct net_device *dev, 319 struct mesh_setup *setup, 320 const struct mesh_config *conf); 321 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 322 struct net_device *dev); 323 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 324 struct net_device *dev); 325 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 326 struct wireless_dev *wdev, 327 struct cfg80211_chan_def *chandef); 328 329 /* OCB */ 330 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 331 struct net_device *dev, 332 struct ocb_setup *setup); 333 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 334 struct net_device *dev, 335 struct ocb_setup *setup); 336 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 337 struct net_device *dev); 338 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 339 struct net_device *dev); 340 341 /* AP */ 342 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 343 struct net_device *dev, bool notify); 344 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 345 struct net_device *dev, bool notify); 346 347 /* MLME */ 348 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 349 struct net_device *dev, 350 struct ieee80211_channel *chan, 351 enum nl80211_auth_type auth_type, 352 const u8 *bssid, 353 const u8 *ssid, int ssid_len, 354 const u8 *ie, int ie_len, 355 const u8 *key, int key_len, int key_idx, 356 const u8 *auth_data, int auth_data_len); 357 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 358 struct net_device *dev, 359 struct ieee80211_channel *chan, 360 const u8 *bssid, 361 const u8 *ssid, int ssid_len, 362 struct cfg80211_assoc_request *req); 363 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 364 struct net_device *dev, const u8 *bssid, 365 const u8 *ie, int ie_len, u16 reason, 366 bool local_state_change); 367 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 368 struct net_device *dev, const u8 *bssid, 369 const u8 *ie, int ie_len, u16 reason, 370 bool local_state_change); 371 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 372 struct net_device *dev); 373 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 374 u16 frame_type, const u8 *match_data, 375 int match_len); 376 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 377 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 378 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 379 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 380 struct wireless_dev *wdev, 381 struct cfg80211_mgmt_tx_params *params, 382 u64 *cookie); 383 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 384 const struct ieee80211_ht_cap *ht_capa_mask); 385 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 386 const struct ieee80211_vht_cap *vht_capa_mask); 387 388 /* SME events */ 389 int cfg80211_connect(struct cfg80211_registered_device *rdev, 390 struct net_device *dev, 391 struct cfg80211_connect_params *connect, 392 struct cfg80211_cached_keys *connkeys, 393 const u8 *prev_bssid); 394 void __cfg80211_connect_result(struct net_device *dev, 395 struct cfg80211_connect_resp_params *params, 396 bool wextev); 397 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 398 size_t ie_len, u16 reason, bool from_ap); 399 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 400 struct net_device *dev, u16 reason, 401 bool wextev); 402 void __cfg80211_roamed(struct wireless_dev *wdev, 403 struct cfg80211_roam_info *info); 404 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 405 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 406 struct wireless_dev *wdev); 407 void cfg80211_autodisconnect_wk(struct work_struct *work); 408 409 /* SME implementation */ 410 void cfg80211_conn_work(struct work_struct *work); 411 void cfg80211_sme_scan_done(struct net_device *dev); 412 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 413 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 414 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 415 void cfg80211_sme_deauth(struct wireless_dev *wdev); 416 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 417 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 418 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 419 420 /* internal helpers */ 421 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 422 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 423 struct key_params *params, int key_idx, 424 bool pairwise, const u8 *mac_addr); 425 void __cfg80211_scan_done(struct work_struct *wk); 426 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 427 bool send_message); 428 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 429 struct cfg80211_sched_scan_request *req); 430 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 431 bool want_multi); 432 void cfg80211_sched_scan_results_wk(struct work_struct *work); 433 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 434 struct cfg80211_sched_scan_request *req, 435 bool driver_initiated); 436 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 437 u64 reqid, bool driver_initiated); 438 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 439 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 440 struct net_device *dev, enum nl80211_iftype ntype, 441 struct vif_params *params); 442 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 443 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 444 445 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 446 u32 center_freq_khz, u32 bw_khz); 447 448 /** 449 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 450 * @wiphy: the wiphy to validate against 451 * @chandef: the channel definition to check 452 * 453 * Checks if chandef is usable and we can/need start CAC on such channel. 454 * 455 * Return: Return true if all channels available and at least 456 * one channel require CAC (NL80211_DFS_USABLE) 457 */ 458 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 459 const struct cfg80211_chan_def *chandef); 460 461 void cfg80211_set_dfs_state(struct wiphy *wiphy, 462 const struct cfg80211_chan_def *chandef, 463 enum nl80211_dfs_state dfs_state); 464 465 void cfg80211_dfs_channels_update_work(struct work_struct *work); 466 467 unsigned int 468 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 469 const struct cfg80211_chan_def *chandef); 470 471 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 472 473 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 474 struct ieee80211_channel *chan); 475 476 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 477 478 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 479 struct ieee80211_channel *chan); 480 481 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 482 { 483 unsigned long end = jiffies; 484 485 if (end >= start) 486 return jiffies_to_msecs(end - start); 487 488 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 489 } 490 491 void 492 cfg80211_get_chan_state(struct wireless_dev *wdev, 493 struct ieee80211_channel **chan, 494 enum cfg80211_chan_mode *chanmode, 495 u8 *radar_detect); 496 497 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 498 struct cfg80211_chan_def *chandef); 499 500 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 501 const u8 *rates, unsigned int n_rates, 502 u32 *mask); 503 504 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 505 enum nl80211_iftype iftype, u32 beacon_int); 506 507 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 508 enum nl80211_iftype iftype, int num); 509 510 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 511 struct wireless_dev *wdev); 512 void cfg80211_leave(struct cfg80211_registered_device *rdev, 513 struct wireless_dev *wdev); 514 515 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 516 struct wireless_dev *wdev); 517 518 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 519 struct wireless_dev *wdev); 520 521 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 522 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 523 #else 524 /* 525 * Trick to enable using it as a condition, 526 * and also not give a warning when it's 527 * not used that way. 528 */ 529 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 530 #endif 531 532 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 533 534 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 535 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 536 void cfg80211_pmsr_free_wk(struct work_struct *work); 537 538 #endif /* __NET_WIRELESS_CORE_H */ 539