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) 2018-2023 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 /* This is constructed like this so it can be used in if/else */ 164 static inline int for_each_rdev_check_rtnl(void) 165 { 166 ASSERT_RTNL(); 167 return 0; 168 } 169 #define for_each_rdev(rdev) \ 170 if (for_each_rdev_check_rtnl()) {} else \ 171 list_for_each_entry(rdev, &cfg80211_rdev_list, list) 172 173 struct cfg80211_internal_bss { 174 struct list_head list; 175 struct list_head hidden_list; 176 struct rb_node rbn; 177 u64 ts_boottime; 178 unsigned long ts; 179 unsigned long refcount; 180 atomic_t hold; 181 182 /* time at the start of the reception of the first octet of the 183 * timestamp field of the last beacon/probe received for this BSS. 184 * The time is the TSF of the BSS specified by %parent_bssid. 185 */ 186 u64 parent_tsf; 187 188 /* the BSS according to which %parent_tsf is set. This is set to 189 * the BSS that the interface that requested the scan was connected to 190 * when the beacon/probe was received. 191 */ 192 u8 parent_bssid[ETH_ALEN] __aligned(2); 193 194 /* must be last because of priv member */ 195 struct cfg80211_bss pub; 196 }; 197 198 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 199 { 200 return container_of(pub, struct cfg80211_internal_bss, pub); 201 } 202 203 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 204 { 205 atomic_inc(&bss->hold); 206 if (bss->pub.transmitted_bss) { 207 bss = container_of(bss->pub.transmitted_bss, 208 struct cfg80211_internal_bss, pub); 209 atomic_inc(&bss->hold); 210 } 211 } 212 213 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 214 { 215 int r = atomic_dec_return(&bss->hold); 216 WARN_ON(r < 0); 217 if (bss->pub.transmitted_bss) { 218 bss = container_of(bss->pub.transmitted_bss, 219 struct cfg80211_internal_bss, pub); 220 r = atomic_dec_return(&bss->hold); 221 WARN_ON(r < 0); 222 } 223 } 224 225 226 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 227 int get_wiphy_idx(struct wiphy *wiphy); 228 229 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 230 231 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 232 struct net *net); 233 234 void cfg80211_init_wdev(struct wireless_dev *wdev); 235 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 236 struct wireless_dev *wdev); 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 peer_addr[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 struct rcu_head rcu_head; 293 u32 rssi_hyst; 294 s32 last_rssi_event_value; 295 enum nl80211_cqm_rssi_threshold_event last_rssi_event_type; 296 bool use_range_api; 297 int n_rssi_thresholds; 298 s32 rssi_thresholds[] __counted_by(n_rssi_thresholds); 299 }; 300 301 void cfg80211_cqm_rssi_notify_work(struct wiphy *wiphy, 302 struct wiphy_work *work); 303 304 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 305 306 /* free object */ 307 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 308 309 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 310 char *newname); 311 312 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 313 314 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 315 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 316 unsigned long age_secs); 317 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 318 unsigned int link, 319 struct ieee80211_channel *channel); 320 321 /* IBSS */ 322 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 323 struct net_device *dev, 324 struct cfg80211_ibss_params *params, 325 struct cfg80211_cached_keys *connkeys); 326 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 327 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 328 struct net_device *dev, bool nowext); 329 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 330 struct ieee80211_channel *channel); 331 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 332 struct wireless_dev *wdev); 333 334 /* mesh */ 335 extern const struct mesh_config default_mesh_config; 336 extern const struct mesh_setup default_mesh_setup; 337 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 338 struct net_device *dev, 339 struct mesh_setup *setup, 340 const struct mesh_config *conf); 341 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 342 struct net_device *dev); 343 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 344 struct wireless_dev *wdev, 345 struct cfg80211_chan_def *chandef); 346 347 /* OCB */ 348 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 349 struct net_device *dev, 350 struct ocb_setup *setup); 351 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 352 struct net_device *dev); 353 354 /* AP */ 355 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 356 struct net_device *dev, int link, 357 bool notify); 358 359 /* MLME */ 360 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 361 struct net_device *dev, 362 struct cfg80211_auth_request *req); 363 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 364 struct net_device *dev, 365 struct cfg80211_assoc_request *req); 366 int cfg80211_mlme_deauth(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 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 371 struct net_device *dev, const u8 *ap_addr, 372 const u8 *ie, int ie_len, u16 reason, 373 bool local_state_change); 374 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 375 struct net_device *dev); 376 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 377 u16 frame_type, const u8 *match_data, 378 int match_len, bool multicast_rx, 379 struct netlink_ext_ack *extack); 380 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 381 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 382 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 383 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 384 struct wireless_dev *wdev, 385 struct cfg80211_mgmt_tx_params *params, 386 u64 *cookie); 387 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 388 const struct ieee80211_ht_cap *ht_capa_mask); 389 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 390 const struct ieee80211_vht_cap *vht_capa_mask); 391 392 /* SME events */ 393 int cfg80211_connect(struct cfg80211_registered_device *rdev, 394 struct net_device *dev, 395 struct cfg80211_connect_params *connect, 396 struct cfg80211_cached_keys *connkeys, 397 const u8 *prev_bssid); 398 void __cfg80211_connect_result(struct net_device *dev, 399 struct cfg80211_connect_resp_params *params, 400 bool wextev); 401 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 402 size_t ie_len, u16 reason, bool from_ap); 403 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 404 struct net_device *dev, u16 reason, 405 bool wextev); 406 void __cfg80211_roamed(struct wireless_dev *wdev, 407 struct cfg80211_roam_info *info); 408 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr, 409 const u8 *td_bitmap, u8 td_bitmap_len); 410 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 411 struct wireless_dev *wdev); 412 void cfg80211_autodisconnect_wk(struct work_struct *work); 413 414 /* SME implementation */ 415 void cfg80211_conn_work(struct work_struct *work); 416 void cfg80211_sme_scan_done(struct net_device *dev); 417 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 418 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 419 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 420 void cfg80211_sme_deauth(struct wireless_dev *wdev); 421 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 422 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 423 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 424 425 /* internal helpers */ 426 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 427 bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, 428 int key_idx, bool pairwise); 429 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 430 struct key_params *params, int key_idx, 431 bool pairwise, const u8 *mac_addr); 432 void __cfg80211_scan_done(struct wiphy *wiphy, struct wiphy_work *wk); 433 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 434 bool send_message); 435 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 436 struct cfg80211_sched_scan_request *req); 437 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 438 bool want_multi); 439 void cfg80211_sched_scan_results_wk(struct work_struct *work); 440 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 441 struct cfg80211_sched_scan_request *req, 442 bool driver_initiated); 443 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 444 u64 reqid, bool driver_initiated); 445 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 446 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 447 struct net_device *dev, enum nl80211_iftype ntype, 448 struct vif_params *params); 449 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 450 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, 451 struct wiphy_work *end); 452 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 453 454 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 455 u32 center_freq_khz, u32 bw_khz); 456 457 int cfg80211_scan(struct cfg80211_registered_device *rdev); 458 459 extern struct work_struct cfg80211_disconnect_work; 460 461 #define NL80211_BSS_USE_FOR_ALL (NL80211_BSS_USE_FOR_NORMAL | \ 462 NL80211_BSS_USE_FOR_MLD_LINK) 463 464 void cfg80211_set_dfs_state(struct wiphy *wiphy, 465 const struct cfg80211_chan_def *chandef, 466 enum nl80211_dfs_state dfs_state); 467 468 void cfg80211_dfs_channels_update_work(struct work_struct *work); 469 470 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 471 472 int 473 cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev, 474 struct wireless_dev *wdev, 475 struct cfg80211_chan_def *chandef); 476 477 void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev); 478 479 void cfg80211_background_cac_done_wk(struct work_struct *work); 480 481 void cfg80211_background_cac_abort_wk(struct work_struct *work); 482 483 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 484 struct ieee80211_channel *chan); 485 486 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 487 488 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 489 struct ieee80211_channel *chan, 490 bool primary_only); 491 bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev, 492 struct ieee80211_channel *chan, 493 bool primary_only); 494 495 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 496 { 497 unsigned long end = jiffies; 498 499 if (end >= start) 500 return jiffies_to_msecs(end - start); 501 502 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 503 } 504 505 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 506 struct cfg80211_chan_def *chandef); 507 508 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 509 const u8 *rates, unsigned int n_rates, 510 u32 *mask); 511 512 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 513 enum nl80211_iftype iftype, u32 beacon_int); 514 515 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 516 enum nl80211_iftype iftype, int num); 517 518 void cfg80211_leave(struct cfg80211_registered_device *rdev, 519 struct wireless_dev *wdev); 520 521 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 522 struct wireless_dev *wdev); 523 524 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 525 struct wireless_dev *wdev); 526 527 struct cfg80211_internal_bss * 528 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 529 struct cfg80211_internal_bss *tmp, 530 bool signal_valid, unsigned long ts); 531 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 532 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 533 #else 534 /* 535 * Trick to enable using it as a condition, 536 * and also not give a warning when it's 537 * not used that way. 538 */ 539 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 540 #endif 541 542 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 543 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 544 void cfg80211_pmsr_free_wk(struct work_struct *work); 545 546 void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id); 547 void cfg80211_remove_links(struct wireless_dev *wdev); 548 int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev, 549 struct wireless_dev *wdev); 550 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask); 551 552 #if IS_ENABLED(CONFIG_CFG80211_KUNIT_TEST) 553 #define EXPORT_SYMBOL_IF_CFG80211_KUNIT(sym) EXPORT_SYMBOL_IF_KUNIT(sym) 554 #define VISIBLE_IF_CFG80211_KUNIT 555 size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen, 556 const u8 *subie, size_t subie_len, 557 u8 *new_ie, size_t new_ie_len); 558 #else 559 #define EXPORT_SYMBOL_IF_CFG80211_KUNIT(sym) 560 #define VISIBLE_IF_CFG80211_KUNIT static 561 #endif /* IS_ENABLED(CONFIG_CFG80211_KUNIT_TEST) */ 562 563 #endif /* __NET_WIRELESS_CORE_H */ 564