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 work_struct 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 work_struct 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 /* must be last because of the way we do wiphy_priv(), 112 * and it should at least be aligned to NETDEV_ALIGN */ 113 struct wiphy wiphy __aligned(NETDEV_ALIGN); 114 }; 115 116 static inline 117 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 118 { 119 BUG_ON(!wiphy); 120 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 121 } 122 123 static inline void 124 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 125 { 126 #ifdef CONFIG_PM 127 int i; 128 129 if (!rdev->wiphy.wowlan_config) 130 return; 131 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 132 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 133 kfree(rdev->wiphy.wowlan_config->patterns); 134 if (rdev->wiphy.wowlan_config->tcp && 135 rdev->wiphy.wowlan_config->tcp->sock) 136 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 137 kfree(rdev->wiphy.wowlan_config->tcp); 138 kfree(rdev->wiphy.wowlan_config->nd_config); 139 kfree(rdev->wiphy.wowlan_config); 140 #endif 141 } 142 143 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) 144 { 145 u64 r = ++rdev->cookie_counter; 146 147 if (WARN_ON(r == 0)) 148 r = ++rdev->cookie_counter; 149 150 return r; 151 } 152 153 extern struct workqueue_struct *cfg80211_wq; 154 extern struct list_head cfg80211_rdev_list; 155 extern int cfg80211_rdev_list_generation; 156 157 struct cfg80211_internal_bss { 158 struct list_head list; 159 struct list_head hidden_list; 160 struct rb_node rbn; 161 u64 ts_boottime; 162 unsigned long ts; 163 unsigned long refcount; 164 atomic_t hold; 165 166 /* time at the start of the reception of the first octet of the 167 * timestamp field of the last beacon/probe received for this BSS. 168 * The time is the TSF of the BSS specified by %parent_bssid. 169 */ 170 u64 parent_tsf; 171 172 /* the BSS according to which %parent_tsf is set. This is set to 173 * the BSS that the interface that requested the scan was connected to 174 * when the beacon/probe was received. 175 */ 176 u8 parent_bssid[ETH_ALEN] __aligned(2); 177 178 /* must be last because of priv member */ 179 struct cfg80211_bss pub; 180 }; 181 182 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 183 { 184 return container_of(pub, struct cfg80211_internal_bss, pub); 185 } 186 187 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 188 { 189 atomic_inc(&bss->hold); 190 if (bss->pub.transmitted_bss) { 191 bss = container_of(bss->pub.transmitted_bss, 192 struct cfg80211_internal_bss, pub); 193 atomic_inc(&bss->hold); 194 } 195 } 196 197 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 198 { 199 int r = atomic_dec_return(&bss->hold); 200 WARN_ON(r < 0); 201 if (bss->pub.transmitted_bss) { 202 bss = container_of(bss->pub.transmitted_bss, 203 struct cfg80211_internal_bss, pub); 204 r = atomic_dec_return(&bss->hold); 205 WARN_ON(r < 0); 206 } 207 } 208 209 210 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 211 int get_wiphy_idx(struct wiphy *wiphy); 212 213 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 214 215 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 216 struct net *net); 217 218 void cfg80211_init_wdev(struct wireless_dev *wdev); 219 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 220 struct wireless_dev *wdev); 221 222 static inline void wdev_lock(struct wireless_dev *wdev) 223 __acquires(wdev) 224 { 225 mutex_lock(&wdev->mtx); 226 __acquire(wdev->mtx); 227 } 228 229 static inline void wdev_unlock(struct wireless_dev *wdev) 230 __releases(wdev) 231 { 232 __release(wdev->mtx); 233 mutex_unlock(&wdev->mtx); 234 } 235 236 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 237 238 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 239 { 240 lockdep_assert_held(&rdev->wiphy.mtx); 241 242 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 243 rdev->num_running_ifaces > 0; 244 } 245 246 enum cfg80211_event_type { 247 EVENT_CONNECT_RESULT, 248 EVENT_ROAMED, 249 EVENT_DISCONNECTED, 250 EVENT_IBSS_JOINED, 251 EVENT_STOPPED, 252 EVENT_PORT_AUTHORIZED, 253 }; 254 255 struct cfg80211_event { 256 struct list_head list; 257 enum cfg80211_event_type type; 258 259 union { 260 struct cfg80211_connect_resp_params cr; 261 struct cfg80211_roam_info rm; 262 struct { 263 const u8 *ie; 264 size_t ie_len; 265 u16 reason; 266 bool locally_generated; 267 } dc; 268 struct { 269 u8 bssid[ETH_ALEN]; 270 struct ieee80211_channel *channel; 271 } ij; 272 struct { 273 u8 bssid[ETH_ALEN]; 274 } pa; 275 }; 276 }; 277 278 struct cfg80211_cached_keys { 279 struct key_params params[CFG80211_MAX_WEP_KEYS]; 280 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 281 int def; 282 }; 283 284 struct cfg80211_beacon_registration { 285 struct list_head list; 286 u32 nlportid; 287 }; 288 289 struct cfg80211_cqm_config { 290 u32 rssi_hyst; 291 s32 last_rssi_event_value; 292 int n_rssi_thresholds; 293 s32 rssi_thresholds[]; 294 }; 295 296 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 297 298 /* free object */ 299 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 300 301 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 302 char *newname); 303 304 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 305 306 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 307 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 308 unsigned long age_secs); 309 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 310 unsigned int link, 311 struct ieee80211_channel *channel); 312 313 /* IBSS */ 314 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 315 struct net_device *dev, 316 struct cfg80211_ibss_params *params, 317 struct cfg80211_cached_keys *connkeys); 318 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 319 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 320 struct net_device *dev, bool nowext); 321 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 322 struct net_device *dev, bool nowext); 323 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 324 struct ieee80211_channel *channel); 325 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 326 struct wireless_dev *wdev); 327 328 /* mesh */ 329 extern const struct mesh_config default_mesh_config; 330 extern const struct mesh_setup default_mesh_setup; 331 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 332 struct net_device *dev, 333 struct mesh_setup *setup, 334 const struct mesh_config *conf); 335 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 336 struct net_device *dev); 337 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 338 struct net_device *dev); 339 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 340 struct wireless_dev *wdev, 341 struct cfg80211_chan_def *chandef); 342 343 /* OCB */ 344 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 345 struct net_device *dev, 346 struct ocb_setup *setup); 347 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 348 struct net_device *dev, 349 struct ocb_setup *setup); 350 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 351 struct net_device *dev); 352 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 353 struct net_device *dev); 354 355 /* AP */ 356 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 357 struct net_device *dev, int link, 358 bool notify); 359 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 360 struct net_device *dev, int link, 361 bool notify); 362 363 /* MLME */ 364 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 365 struct net_device *dev, 366 struct cfg80211_auth_request *req); 367 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 368 struct net_device *dev, 369 struct cfg80211_assoc_request *req); 370 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 371 struct net_device *dev, const u8 *bssid, 372 const u8 *ie, int ie_len, u16 reason, 373 bool local_state_change); 374 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 375 struct net_device *dev, const u8 *ap_addr, 376 const u8 *ie, int ie_len, u16 reason, 377 bool local_state_change); 378 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 379 struct net_device *dev); 380 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 381 u16 frame_type, const u8 *match_data, 382 int match_len, bool multicast_rx, 383 struct netlink_ext_ack *extack); 384 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 385 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 386 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 387 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 388 struct wireless_dev *wdev, 389 struct cfg80211_mgmt_tx_params *params, 390 u64 *cookie); 391 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 392 const struct ieee80211_ht_cap *ht_capa_mask); 393 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 394 const struct ieee80211_vht_cap *vht_capa_mask); 395 396 /* SME events */ 397 int cfg80211_connect(struct cfg80211_registered_device *rdev, 398 struct net_device *dev, 399 struct cfg80211_connect_params *connect, 400 struct cfg80211_cached_keys *connkeys, 401 const u8 *prev_bssid); 402 void __cfg80211_connect_result(struct net_device *dev, 403 struct cfg80211_connect_resp_params *params, 404 bool wextev); 405 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 406 size_t ie_len, u16 reason, bool from_ap); 407 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 408 struct net_device *dev, u16 reason, 409 bool wextev); 410 void __cfg80211_roamed(struct wireless_dev *wdev, 411 struct cfg80211_roam_info *info); 412 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 413 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 414 struct wireless_dev *wdev); 415 void cfg80211_autodisconnect_wk(struct work_struct *work); 416 417 /* SME implementation */ 418 void cfg80211_conn_work(struct work_struct *work); 419 void cfg80211_sme_scan_done(struct net_device *dev); 420 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 421 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 422 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 423 void cfg80211_sme_deauth(struct wireless_dev *wdev); 424 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 425 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 426 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 427 428 /* internal helpers */ 429 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 430 bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, 431 int key_idx, bool pairwise); 432 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 433 struct key_params *params, int key_idx, 434 bool pairwise, const u8 *mac_addr); 435 void __cfg80211_scan_done(struct work_struct *wk); 436 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 437 bool send_message); 438 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 439 struct cfg80211_sched_scan_request *req); 440 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 441 bool want_multi); 442 void cfg80211_sched_scan_results_wk(struct work_struct *work); 443 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 444 struct cfg80211_sched_scan_request *req, 445 bool driver_initiated); 446 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 447 u64 reqid, bool driver_initiated); 448 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 449 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 450 struct net_device *dev, enum nl80211_iftype ntype, 451 struct vif_params *params); 452 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 453 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 454 455 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 456 u32 center_freq_khz, u32 bw_khz); 457 458 int cfg80211_scan(struct cfg80211_registered_device *rdev); 459 460 extern struct work_struct cfg80211_disconnect_work; 461 462 /** 463 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 464 * @wiphy: the wiphy to validate against 465 * @chandef: the channel definition to check 466 * 467 * Checks if chandef is usable and we can/need start CAC on such channel. 468 * 469 * Return: true if all channels available and at least 470 * one channel requires CAC (NL80211_DFS_USABLE) 471 */ 472 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 473 const struct cfg80211_chan_def *chandef); 474 475 void cfg80211_set_dfs_state(struct wiphy *wiphy, 476 const struct cfg80211_chan_def *chandef, 477 enum nl80211_dfs_state dfs_state); 478 479 void cfg80211_dfs_channels_update_work(struct work_struct *work); 480 481 unsigned int 482 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 483 const struct cfg80211_chan_def *chandef); 484 485 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 486 487 int 488 cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev, 489 struct wireless_dev *wdev, 490 struct cfg80211_chan_def *chandef); 491 492 void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev); 493 494 void cfg80211_background_cac_done_wk(struct work_struct *work); 495 496 void cfg80211_background_cac_abort_wk(struct work_struct *work); 497 498 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 499 struct ieee80211_channel *chan); 500 501 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 502 503 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 504 struct ieee80211_channel *chan, 505 bool primary_only); 506 bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev, 507 struct ieee80211_channel *chan, 508 bool primary_only); 509 510 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 511 { 512 unsigned long end = jiffies; 513 514 if (end >= start) 515 return jiffies_to_msecs(end - start); 516 517 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 518 } 519 520 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 521 struct cfg80211_chan_def *chandef); 522 523 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 524 const u8 *rates, unsigned int n_rates, 525 u32 *mask); 526 527 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 528 enum nl80211_iftype iftype, u32 beacon_int); 529 530 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 531 enum nl80211_iftype iftype, int num); 532 533 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 534 struct wireless_dev *wdev); 535 void cfg80211_leave(struct cfg80211_registered_device *rdev, 536 struct wireless_dev *wdev); 537 538 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 539 struct wireless_dev *wdev); 540 541 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 542 struct wireless_dev *wdev); 543 544 struct cfg80211_internal_bss * 545 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 546 struct cfg80211_internal_bss *tmp, 547 bool signal_valid, unsigned long ts); 548 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 549 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 550 #else 551 /* 552 * Trick to enable using it as a condition, 553 * and also not give a warning when it's 554 * not used that way. 555 */ 556 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 557 #endif 558 559 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 560 561 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 562 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 563 void cfg80211_pmsr_free_wk(struct work_struct *work); 564 565 void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id); 566 void cfg80211_remove_links(struct wireless_dev *wdev); 567 int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev, 568 struct wireless_dev *wdev); 569 570 #endif /* __NET_WIRELESS_CORE_H */ 571