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 const u8 *td_bitmap; 275 u8 td_bitmap_len; 276 } pa; 277 }; 278 }; 279 280 struct cfg80211_cached_keys { 281 struct key_params params[4]; 282 u8 data[4][WLAN_KEY_LEN_WEP104]; 283 int def; 284 }; 285 286 struct cfg80211_beacon_registration { 287 struct list_head list; 288 u32 nlportid; 289 }; 290 291 struct cfg80211_cqm_config { 292 u32 rssi_hyst; 293 s32 last_rssi_event_value; 294 int n_rssi_thresholds; 295 s32 rssi_thresholds[]; 296 }; 297 298 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 299 300 /* free object */ 301 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 302 303 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 304 char *newname); 305 306 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 307 308 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 309 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 310 unsigned long age_secs); 311 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 312 unsigned int link, 313 struct ieee80211_channel *channel); 314 315 /* IBSS */ 316 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 317 struct net_device *dev, 318 struct cfg80211_ibss_params *params, 319 struct cfg80211_cached_keys *connkeys); 320 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 321 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 322 struct net_device *dev, bool nowext); 323 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 324 struct net_device *dev, bool nowext); 325 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 326 struct ieee80211_channel *channel); 327 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 328 struct wireless_dev *wdev); 329 330 /* mesh */ 331 extern const struct mesh_config default_mesh_config; 332 extern const struct mesh_setup default_mesh_setup; 333 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 334 struct net_device *dev, 335 struct mesh_setup *setup, 336 const struct mesh_config *conf); 337 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 338 struct net_device *dev); 339 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 340 struct net_device *dev); 341 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 342 struct wireless_dev *wdev, 343 struct cfg80211_chan_def *chandef); 344 345 /* OCB */ 346 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 347 struct net_device *dev, 348 struct ocb_setup *setup); 349 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 350 struct net_device *dev, 351 struct ocb_setup *setup); 352 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 353 struct net_device *dev); 354 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 355 struct net_device *dev); 356 357 /* AP */ 358 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 359 struct net_device *dev, int link, 360 bool notify); 361 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 362 struct net_device *dev, int link, 363 bool notify); 364 365 /* MLME */ 366 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 367 struct net_device *dev, 368 struct cfg80211_auth_request *req); 369 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 370 struct net_device *dev, 371 struct cfg80211_assoc_request *req); 372 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 373 struct net_device *dev, const u8 *bssid, 374 const u8 *ie, int ie_len, u16 reason, 375 bool local_state_change); 376 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 377 struct net_device *dev, const u8 *ap_addr, 378 const u8 *ie, int ie_len, u16 reason, 379 bool local_state_change); 380 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 381 struct net_device *dev); 382 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 383 u16 frame_type, const u8 *match_data, 384 int match_len, bool multicast_rx, 385 struct netlink_ext_ack *extack); 386 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 387 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 388 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 389 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 390 struct wireless_dev *wdev, 391 struct cfg80211_mgmt_tx_params *params, 392 u64 *cookie); 393 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 394 const struct ieee80211_ht_cap *ht_capa_mask); 395 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 396 const struct ieee80211_vht_cap *vht_capa_mask); 397 398 /* SME events */ 399 int cfg80211_connect(struct cfg80211_registered_device *rdev, 400 struct net_device *dev, 401 struct cfg80211_connect_params *connect, 402 struct cfg80211_cached_keys *connkeys, 403 const u8 *prev_bssid); 404 void __cfg80211_connect_result(struct net_device *dev, 405 struct cfg80211_connect_resp_params *params, 406 bool wextev); 407 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 408 size_t ie_len, u16 reason, bool from_ap); 409 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 410 struct net_device *dev, u16 reason, 411 bool wextev); 412 void __cfg80211_roamed(struct wireless_dev *wdev, 413 struct cfg80211_roam_info *info); 414 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid, 415 const u8 *td_bitmap, u8 td_bitmap_len); 416 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 417 struct wireless_dev *wdev); 418 void cfg80211_autodisconnect_wk(struct work_struct *work); 419 420 /* SME implementation */ 421 void cfg80211_conn_work(struct work_struct *work); 422 void cfg80211_sme_scan_done(struct net_device *dev); 423 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 424 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 425 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 426 void cfg80211_sme_deauth(struct wireless_dev *wdev); 427 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 428 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 429 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 430 431 /* internal helpers */ 432 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 433 bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, 434 int key_idx, bool pairwise); 435 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 436 struct key_params *params, int key_idx, 437 bool pairwise, const u8 *mac_addr); 438 void __cfg80211_scan_done(struct work_struct *wk); 439 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 440 bool send_message); 441 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 442 struct cfg80211_sched_scan_request *req); 443 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 444 bool want_multi); 445 void cfg80211_sched_scan_results_wk(struct work_struct *work); 446 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 447 struct cfg80211_sched_scan_request *req, 448 bool driver_initiated); 449 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 450 u64 reqid, bool driver_initiated); 451 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 452 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 453 struct net_device *dev, enum nl80211_iftype ntype, 454 struct vif_params *params); 455 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 456 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 457 458 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 459 u32 center_freq_khz, u32 bw_khz); 460 461 int cfg80211_scan(struct cfg80211_registered_device *rdev); 462 463 extern struct work_struct cfg80211_disconnect_work; 464 465 /** 466 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 467 * @wiphy: the wiphy to validate against 468 * @chandef: the channel definition to check 469 * 470 * Checks if chandef is usable and we can/need start CAC on such channel. 471 * 472 * Return: true if all channels available and at least 473 * one channel requires CAC (NL80211_DFS_USABLE) 474 */ 475 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 476 const struct cfg80211_chan_def *chandef); 477 478 void cfg80211_set_dfs_state(struct wiphy *wiphy, 479 const struct cfg80211_chan_def *chandef, 480 enum nl80211_dfs_state dfs_state); 481 482 void cfg80211_dfs_channels_update_work(struct work_struct *work); 483 484 unsigned int 485 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 486 const struct cfg80211_chan_def *chandef); 487 488 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 489 490 int 491 cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev, 492 struct wireless_dev *wdev, 493 struct cfg80211_chan_def *chandef); 494 495 void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev); 496 497 void cfg80211_background_cac_done_wk(struct work_struct *work); 498 499 void cfg80211_background_cac_abort_wk(struct work_struct *work); 500 501 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 502 struct ieee80211_channel *chan); 503 504 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 505 506 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 507 struct ieee80211_channel *chan, 508 bool primary_only); 509 bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev, 510 struct ieee80211_channel *chan, 511 bool primary_only); 512 513 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 514 { 515 unsigned long end = jiffies; 516 517 if (end >= start) 518 return jiffies_to_msecs(end - start); 519 520 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 521 } 522 523 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 524 struct cfg80211_chan_def *chandef); 525 526 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 527 const u8 *rates, unsigned int n_rates, 528 u32 *mask); 529 530 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 531 enum nl80211_iftype iftype, u32 beacon_int); 532 533 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 534 enum nl80211_iftype iftype, int num); 535 536 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 537 struct wireless_dev *wdev); 538 void cfg80211_leave(struct cfg80211_registered_device *rdev, 539 struct wireless_dev *wdev); 540 541 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 542 struct wireless_dev *wdev); 543 544 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 545 struct wireless_dev *wdev); 546 547 struct cfg80211_internal_bss * 548 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 549 struct cfg80211_internal_bss *tmp, 550 bool signal_valid, unsigned long ts); 551 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 552 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 553 #else 554 /* 555 * Trick to enable using it as a condition, 556 * and also not give a warning when it's 557 * not used that way. 558 */ 559 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 560 #endif 561 562 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 563 564 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 565 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 566 void cfg80211_pmsr_free_wk(struct work_struct *work); 567 568 void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id); 569 void cfg80211_remove_links(struct wireless_dev *wdev); 570 int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev, 571 struct wireless_dev *wdev); 572 573 #endif /* __NET_WIRELESS_CORE_H */ 574