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) 2018-2022 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 work_struct rfkill_block; 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 /* protected by RTNL only */ 63 int num_running_ifaces; 64 int num_running_monitor_ifaces; 65 u64 cookie_counter; 66 67 /* BSSes/scanning */ 68 spinlock_t bss_lock; 69 struct list_head bss_list; 70 struct rb_root bss_tree; 71 u32 bss_generation; 72 u32 bss_entries; 73 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 74 struct cfg80211_scan_request *int_scan_req; 75 struct sk_buff *scan_msg; 76 struct list_head sched_scan_req_list; 77 time64_t suspend_at; 78 struct wiphy_work scan_done_wk; 79 80 struct genl_info *cur_cmd_info; 81 82 struct work_struct conn_work; 83 struct work_struct event_work; 84 85 struct delayed_work dfs_update_channels_wk; 86 87 struct wireless_dev *background_radar_wdev; 88 struct cfg80211_chan_def background_radar_chandef; 89 struct delayed_work background_cac_done_wk; 90 struct work_struct background_cac_abort_wk; 91 92 /* netlink port which started critical protocol (0 means not started) */ 93 u32 crit_proto_nlportid; 94 95 struct cfg80211_coalesce *coalesce; 96 97 struct work_struct destroy_work; 98 struct wiphy_work sched_scan_stop_wk; 99 struct work_struct sched_scan_res_wk; 100 101 struct cfg80211_chan_def radar_chandef; 102 struct work_struct propagate_radar_detect_wk; 103 104 struct cfg80211_chan_def cac_done_chandef; 105 struct work_struct propagate_cac_done_wk; 106 107 struct work_struct mgmt_registrations_update_wk; 108 /* lock for all wdev lists */ 109 spinlock_t mgmt_registrations_lock; 110 111 struct work_struct wiphy_work; 112 struct list_head wiphy_work_list; 113 /* protects the list above */ 114 spinlock_t wiphy_work_lock; 115 bool suspended; 116 117 /* must be last because of the way we do wiphy_priv(), 118 * and it should at least be aligned to NETDEV_ALIGN */ 119 struct wiphy wiphy __aligned(NETDEV_ALIGN); 120 }; 121 122 static inline 123 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 124 { 125 BUG_ON(!wiphy); 126 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 127 } 128 129 static inline void 130 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 131 { 132 #ifdef CONFIG_PM 133 int i; 134 135 if (!rdev->wiphy.wowlan_config) 136 return; 137 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 138 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 139 kfree(rdev->wiphy.wowlan_config->patterns); 140 if (rdev->wiphy.wowlan_config->tcp && 141 rdev->wiphy.wowlan_config->tcp->sock) 142 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 143 kfree(rdev->wiphy.wowlan_config->tcp); 144 kfree(rdev->wiphy.wowlan_config->nd_config); 145 kfree(rdev->wiphy.wowlan_config); 146 #endif 147 } 148 149 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) 150 { 151 u64 r = ++rdev->cookie_counter; 152 153 if (WARN_ON(r == 0)) 154 r = ++rdev->cookie_counter; 155 156 return r; 157 } 158 159 extern struct workqueue_struct *cfg80211_wq; 160 extern struct list_head cfg80211_rdev_list; 161 extern int cfg80211_rdev_list_generation; 162 163 struct cfg80211_internal_bss { 164 struct list_head list; 165 struct list_head hidden_list; 166 struct rb_node rbn; 167 u64 ts_boottime; 168 unsigned long ts; 169 unsigned long refcount; 170 atomic_t hold; 171 172 /* time at the start of the reception of the first octet of the 173 * timestamp field of the last beacon/probe received for this BSS. 174 * The time is the TSF of the BSS specified by %parent_bssid. 175 */ 176 u64 parent_tsf; 177 178 /* the BSS according to which %parent_tsf is set. This is set to 179 * the BSS that the interface that requested the scan was connected to 180 * when the beacon/probe was received. 181 */ 182 u8 parent_bssid[ETH_ALEN] __aligned(2); 183 184 /* must be last because of priv member */ 185 struct cfg80211_bss pub; 186 }; 187 188 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 189 { 190 return container_of(pub, struct cfg80211_internal_bss, pub); 191 } 192 193 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 194 { 195 atomic_inc(&bss->hold); 196 if (bss->pub.transmitted_bss) { 197 bss = container_of(bss->pub.transmitted_bss, 198 struct cfg80211_internal_bss, pub); 199 atomic_inc(&bss->hold); 200 } 201 } 202 203 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 204 { 205 int r = atomic_dec_return(&bss->hold); 206 WARN_ON(r < 0); 207 if (bss->pub.transmitted_bss) { 208 bss = container_of(bss->pub.transmitted_bss, 209 struct cfg80211_internal_bss, pub); 210 r = atomic_dec_return(&bss->hold); 211 WARN_ON(r < 0); 212 } 213 } 214 215 216 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 217 int get_wiphy_idx(struct wiphy *wiphy); 218 219 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 220 221 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 222 struct net *net); 223 224 void cfg80211_init_wdev(struct wireless_dev *wdev); 225 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 226 struct wireless_dev *wdev); 227 228 static inline void wdev_lock(struct wireless_dev *wdev) 229 __acquires(wdev) 230 { 231 mutex_lock(&wdev->mtx); 232 __acquire(wdev->mtx); 233 } 234 235 static inline void wdev_unlock(struct wireless_dev *wdev) 236 __releases(wdev) 237 { 238 __release(wdev->mtx); 239 mutex_unlock(&wdev->mtx); 240 } 241 242 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 243 244 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 245 { 246 lockdep_assert_held(&rdev->wiphy.mtx); 247 248 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 249 rdev->num_running_ifaces > 0; 250 } 251 252 enum cfg80211_event_type { 253 EVENT_CONNECT_RESULT, 254 EVENT_ROAMED, 255 EVENT_DISCONNECTED, 256 EVENT_IBSS_JOINED, 257 EVENT_STOPPED, 258 EVENT_PORT_AUTHORIZED, 259 }; 260 261 struct cfg80211_event { 262 struct list_head list; 263 enum cfg80211_event_type type; 264 265 union { 266 struct cfg80211_connect_resp_params cr; 267 struct cfg80211_roam_info rm; 268 struct { 269 const u8 *ie; 270 size_t ie_len; 271 u16 reason; 272 bool locally_generated; 273 } dc; 274 struct { 275 u8 bssid[ETH_ALEN]; 276 struct ieee80211_channel *channel; 277 } ij; 278 struct { 279 u8 bssid[ETH_ALEN]; 280 const u8 *td_bitmap; 281 u8 td_bitmap_len; 282 } pa; 283 }; 284 }; 285 286 struct cfg80211_cached_keys { 287 struct key_params params[4]; 288 u8 data[4][WLAN_KEY_LEN_WEP104]; 289 int def; 290 }; 291 292 struct cfg80211_beacon_registration { 293 struct list_head list; 294 u32 nlportid; 295 }; 296 297 struct cfg80211_cqm_config { 298 struct rcu_head rcu_head; 299 u32 rssi_hyst; 300 s32 last_rssi_event_value; 301 enum nl80211_cqm_rssi_threshold_event last_rssi_event_type; 302 int n_rssi_thresholds; 303 s32 rssi_thresholds[] __counted_by(n_rssi_thresholds); 304 }; 305 306 void cfg80211_cqm_rssi_notify_work(struct wiphy *wiphy, 307 struct wiphy_work *work); 308 309 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 310 311 /* free object */ 312 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 313 314 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 315 char *newname); 316 317 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 318 319 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 320 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 321 unsigned long age_secs); 322 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 323 unsigned int link, 324 struct ieee80211_channel *channel); 325 326 /* IBSS */ 327 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 328 struct net_device *dev, 329 struct cfg80211_ibss_params *params, 330 struct cfg80211_cached_keys *connkeys); 331 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 332 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 333 struct net_device *dev, bool nowext); 334 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 335 struct net_device *dev, bool nowext); 336 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 337 struct ieee80211_channel *channel); 338 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 339 struct wireless_dev *wdev); 340 341 /* mesh */ 342 extern const struct mesh_config default_mesh_config; 343 extern const struct mesh_setup default_mesh_setup; 344 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 345 struct net_device *dev, 346 struct mesh_setup *setup, 347 const struct mesh_config *conf); 348 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 349 struct net_device *dev); 350 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 351 struct net_device *dev); 352 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 353 struct wireless_dev *wdev, 354 struct cfg80211_chan_def *chandef); 355 356 /* OCB */ 357 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 358 struct net_device *dev, 359 struct ocb_setup *setup); 360 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 361 struct net_device *dev, 362 struct ocb_setup *setup); 363 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 364 struct net_device *dev); 365 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 366 struct net_device *dev); 367 368 /* AP */ 369 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 370 struct net_device *dev, int link, 371 bool notify); 372 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 373 struct net_device *dev, int link, 374 bool notify); 375 376 /* MLME */ 377 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 378 struct net_device *dev, 379 struct cfg80211_auth_request *req); 380 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 381 struct net_device *dev, 382 struct cfg80211_assoc_request *req); 383 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 384 struct net_device *dev, const u8 *bssid, 385 const u8 *ie, int ie_len, u16 reason, 386 bool local_state_change); 387 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 388 struct net_device *dev, const u8 *ap_addr, 389 const u8 *ie, int ie_len, u16 reason, 390 bool local_state_change); 391 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 392 struct net_device *dev); 393 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 394 u16 frame_type, const u8 *match_data, 395 int match_len, bool multicast_rx, 396 struct netlink_ext_ack *extack); 397 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 398 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 399 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 400 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 401 struct wireless_dev *wdev, 402 struct cfg80211_mgmt_tx_params *params, 403 u64 *cookie); 404 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 405 const struct ieee80211_ht_cap *ht_capa_mask); 406 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 407 const struct ieee80211_vht_cap *vht_capa_mask); 408 409 /* SME events */ 410 int cfg80211_connect(struct cfg80211_registered_device *rdev, 411 struct net_device *dev, 412 struct cfg80211_connect_params *connect, 413 struct cfg80211_cached_keys *connkeys, 414 const u8 *prev_bssid); 415 void __cfg80211_connect_result(struct net_device *dev, 416 struct cfg80211_connect_resp_params *params, 417 bool wextev); 418 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 419 size_t ie_len, u16 reason, bool from_ap); 420 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 421 struct net_device *dev, u16 reason, 422 bool wextev); 423 void __cfg80211_roamed(struct wireless_dev *wdev, 424 struct cfg80211_roam_info *info); 425 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid, 426 const u8 *td_bitmap, u8 td_bitmap_len); 427 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 428 struct wireless_dev *wdev); 429 void cfg80211_autodisconnect_wk(struct work_struct *work); 430 431 /* SME implementation */ 432 void cfg80211_conn_work(struct work_struct *work); 433 void cfg80211_sme_scan_done(struct net_device *dev); 434 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 435 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 436 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 437 void cfg80211_sme_deauth(struct wireless_dev *wdev); 438 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 439 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 440 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 441 442 /* internal helpers */ 443 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 444 bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, 445 int key_idx, bool pairwise); 446 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 447 struct key_params *params, int key_idx, 448 bool pairwise, const u8 *mac_addr); 449 void __cfg80211_scan_done(struct wiphy *wiphy, struct wiphy_work *wk); 450 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 451 bool send_message); 452 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 453 struct cfg80211_sched_scan_request *req); 454 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 455 bool want_multi); 456 void cfg80211_sched_scan_results_wk(struct work_struct *work); 457 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 458 struct cfg80211_sched_scan_request *req, 459 bool driver_initiated); 460 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 461 u64 reqid, bool driver_initiated); 462 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 463 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 464 struct net_device *dev, enum nl80211_iftype ntype, 465 struct vif_params *params); 466 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 467 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, 468 struct wiphy_work *end); 469 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 470 471 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 472 u32 center_freq_khz, u32 bw_khz); 473 474 int cfg80211_scan(struct cfg80211_registered_device *rdev); 475 476 extern struct work_struct cfg80211_disconnect_work; 477 478 /** 479 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 480 * @wiphy: the wiphy to validate against 481 * @chandef: the channel definition to check 482 * 483 * Checks if chandef is usable and we can/need start CAC on such channel. 484 * 485 * Return: true if all channels available and at least 486 * one channel requires CAC (NL80211_DFS_USABLE) 487 */ 488 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 489 const struct cfg80211_chan_def *chandef); 490 491 void cfg80211_set_dfs_state(struct wiphy *wiphy, 492 const struct cfg80211_chan_def *chandef, 493 enum nl80211_dfs_state dfs_state); 494 495 void cfg80211_dfs_channels_update_work(struct work_struct *work); 496 497 unsigned int 498 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 499 const struct cfg80211_chan_def *chandef); 500 501 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 502 503 int 504 cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev, 505 struct wireless_dev *wdev, 506 struct cfg80211_chan_def *chandef); 507 508 void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev); 509 510 void cfg80211_background_cac_done_wk(struct work_struct *work); 511 512 void cfg80211_background_cac_abort_wk(struct work_struct *work); 513 514 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 515 struct ieee80211_channel *chan); 516 517 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 518 519 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 520 struct ieee80211_channel *chan, 521 bool primary_only); 522 bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev, 523 struct ieee80211_channel *chan, 524 bool primary_only); 525 526 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 527 { 528 unsigned long end = jiffies; 529 530 if (end >= start) 531 return jiffies_to_msecs(end - start); 532 533 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 534 } 535 536 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 537 struct cfg80211_chan_def *chandef); 538 539 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 540 const u8 *rates, unsigned int n_rates, 541 u32 *mask); 542 543 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 544 enum nl80211_iftype iftype, u32 beacon_int); 545 546 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 547 enum nl80211_iftype iftype, int num); 548 549 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 550 struct wireless_dev *wdev); 551 void cfg80211_leave(struct cfg80211_registered_device *rdev, 552 struct wireless_dev *wdev); 553 554 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 555 struct wireless_dev *wdev); 556 557 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 558 struct wireless_dev *wdev); 559 560 struct cfg80211_internal_bss * 561 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 562 struct cfg80211_internal_bss *tmp, 563 bool signal_valid, unsigned long ts); 564 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 565 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 566 #else 567 /* 568 * Trick to enable using it as a condition, 569 * and also not give a warning when it's 570 * not used that way. 571 */ 572 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 573 #endif 574 575 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 576 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 577 void cfg80211_pmsr_free_wk(struct work_struct *work); 578 579 void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id); 580 void cfg80211_remove_links(struct wireless_dev *wdev); 581 int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev, 582 struct wireless_dev *wdev); 583 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask); 584 585 #endif /* __NET_WIRELESS_CORE_H */ 586