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) 2018-2021 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 /* netlink port which started critical protocol (0 means not started) */ 88 u32 crit_proto_nlportid; 89 90 struct cfg80211_coalesce *coalesce; 91 92 struct work_struct destroy_work; 93 struct work_struct sched_scan_stop_wk; 94 struct work_struct sched_scan_res_wk; 95 96 struct cfg80211_chan_def radar_chandef; 97 struct work_struct propagate_radar_detect_wk; 98 99 struct cfg80211_chan_def cac_done_chandef; 100 struct work_struct propagate_cac_done_wk; 101 102 struct work_struct mgmt_registrations_update_wk; 103 /* lock for all wdev lists */ 104 spinlock_t mgmt_registrations_lock; 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 if (bss->pub.transmitted_bss) { 186 bss = container_of(bss->pub.transmitted_bss, 187 struct cfg80211_internal_bss, pub); 188 atomic_inc(&bss->hold); 189 } 190 } 191 192 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 193 { 194 int r = atomic_dec_return(&bss->hold); 195 WARN_ON(r < 0); 196 if (bss->pub.transmitted_bss) { 197 bss = container_of(bss->pub.transmitted_bss, 198 struct cfg80211_internal_bss, pub); 199 r = atomic_dec_return(&bss->hold); 200 WARN_ON(r < 0); 201 } 202 } 203 204 205 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 206 int get_wiphy_idx(struct wiphy *wiphy); 207 208 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 209 210 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 211 struct net *net); 212 213 void cfg80211_init_wdev(struct wireless_dev *wdev); 214 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 215 struct wireless_dev *wdev); 216 217 static inline void wdev_lock(struct wireless_dev *wdev) 218 __acquires(wdev) 219 { 220 mutex_lock(&wdev->mtx); 221 __acquire(wdev->mtx); 222 } 223 224 static inline void wdev_unlock(struct wireless_dev *wdev) 225 __releases(wdev) 226 { 227 __release(wdev->mtx); 228 mutex_unlock(&wdev->mtx); 229 } 230 231 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 232 233 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 234 { 235 lockdep_assert_held(&rdev->wiphy.mtx); 236 237 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 238 rdev->num_running_ifaces > 0; 239 } 240 241 enum cfg80211_event_type { 242 EVENT_CONNECT_RESULT, 243 EVENT_ROAMED, 244 EVENT_DISCONNECTED, 245 EVENT_IBSS_JOINED, 246 EVENT_STOPPED, 247 EVENT_PORT_AUTHORIZED, 248 }; 249 250 struct cfg80211_event { 251 struct list_head list; 252 enum cfg80211_event_type type; 253 254 union { 255 struct cfg80211_connect_resp_params cr; 256 struct cfg80211_roam_info rm; 257 struct { 258 const u8 *ie; 259 size_t ie_len; 260 u16 reason; 261 bool locally_generated; 262 } dc; 263 struct { 264 u8 bssid[ETH_ALEN]; 265 struct ieee80211_channel *channel; 266 } ij; 267 struct { 268 u8 bssid[ETH_ALEN]; 269 } pa; 270 }; 271 }; 272 273 struct cfg80211_cached_keys { 274 struct key_params params[CFG80211_MAX_WEP_KEYS]; 275 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 276 int def; 277 }; 278 279 enum cfg80211_chan_mode { 280 CHAN_MODE_UNDEFINED, 281 CHAN_MODE_SHARED, 282 CHAN_MODE_EXCLUSIVE, 283 }; 284 285 struct cfg80211_beacon_registration { 286 struct list_head list; 287 u32 nlportid; 288 }; 289 290 struct cfg80211_cqm_config { 291 u32 rssi_hyst; 292 s32 last_rssi_event_value; 293 int n_rssi_thresholds; 294 s32 rssi_thresholds[]; 295 }; 296 297 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 298 299 /* free object */ 300 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 301 302 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 303 char *newname); 304 305 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 306 307 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 308 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 309 unsigned long age_secs); 310 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 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, bool notify); 358 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 359 struct net_device *dev, bool notify); 360 361 /* MLME */ 362 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 363 struct net_device *dev, 364 struct ieee80211_channel *chan, 365 enum nl80211_auth_type auth_type, 366 const u8 *bssid, 367 const u8 *ssid, int ssid_len, 368 const u8 *ie, int ie_len, 369 const u8 *key, int key_len, int key_idx, 370 const u8 *auth_data, int auth_data_len); 371 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 372 struct net_device *dev, 373 struct ieee80211_channel *chan, 374 const u8 *bssid, 375 const u8 *ssid, int ssid_len, 376 struct cfg80211_assoc_request *req); 377 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 378 struct net_device *dev, const u8 *bssid, 379 const u8 *ie, int ie_len, u16 reason, 380 bool local_state_change); 381 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 382 struct net_device *dev, const u8 *bssid, 383 const u8 *ie, int ie_len, u16 reason, 384 bool local_state_change); 385 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 386 struct net_device *dev); 387 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 388 u16 frame_type, const u8 *match_data, 389 int match_len, bool multicast_rx, 390 struct netlink_ext_ack *extack); 391 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 392 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 393 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 394 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 395 struct wireless_dev *wdev, 396 struct cfg80211_mgmt_tx_params *params, 397 u64 *cookie); 398 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 399 const struct ieee80211_ht_cap *ht_capa_mask); 400 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 401 const struct ieee80211_vht_cap *vht_capa_mask); 402 403 /* SME events */ 404 int cfg80211_connect(struct cfg80211_registered_device *rdev, 405 struct net_device *dev, 406 struct cfg80211_connect_params *connect, 407 struct cfg80211_cached_keys *connkeys, 408 const u8 *prev_bssid); 409 void __cfg80211_connect_result(struct net_device *dev, 410 struct cfg80211_connect_resp_params *params, 411 bool wextev); 412 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 413 size_t ie_len, u16 reason, bool from_ap); 414 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 415 struct net_device *dev, u16 reason, 416 bool wextev); 417 void __cfg80211_roamed(struct wireless_dev *wdev, 418 struct cfg80211_roam_info *info); 419 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 420 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 421 struct wireless_dev *wdev); 422 void cfg80211_autodisconnect_wk(struct work_struct *work); 423 424 /* SME implementation */ 425 void cfg80211_conn_work(struct work_struct *work); 426 void cfg80211_sme_scan_done(struct net_device *dev); 427 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 428 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 429 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 430 void cfg80211_sme_deauth(struct wireless_dev *wdev); 431 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 432 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 433 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 434 435 /* internal helpers */ 436 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 437 bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, 438 int key_idx, bool pairwise); 439 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 440 struct key_params *params, int key_idx, 441 bool pairwise, const u8 *mac_addr); 442 void __cfg80211_scan_done(struct work_struct *wk); 443 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 444 bool send_message); 445 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 446 struct cfg80211_sched_scan_request *req); 447 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 448 bool want_multi); 449 void cfg80211_sched_scan_results_wk(struct work_struct *work); 450 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 451 struct cfg80211_sched_scan_request *req, 452 bool driver_initiated); 453 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 454 u64 reqid, bool driver_initiated); 455 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 456 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 457 struct net_device *dev, enum nl80211_iftype ntype, 458 struct vif_params *params); 459 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 460 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 461 462 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 463 u32 center_freq_khz, u32 bw_khz); 464 465 int cfg80211_scan(struct cfg80211_registered_device *rdev); 466 467 extern struct work_struct cfg80211_disconnect_work; 468 469 /** 470 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 471 * @wiphy: the wiphy to validate against 472 * @chandef: the channel definition to check 473 * 474 * Checks if chandef is usable and we can/need start CAC on such channel. 475 * 476 * Return: true if all channels available and at least 477 * one channel requires CAC (NL80211_DFS_USABLE) 478 */ 479 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 480 const struct cfg80211_chan_def *chandef); 481 482 void cfg80211_set_dfs_state(struct wiphy *wiphy, 483 const struct cfg80211_chan_def *chandef, 484 enum nl80211_dfs_state dfs_state); 485 486 void cfg80211_dfs_channels_update_work(struct work_struct *work); 487 488 unsigned int 489 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 490 const struct cfg80211_chan_def *chandef); 491 492 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 493 494 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 495 struct ieee80211_channel *chan); 496 497 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 498 499 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 500 struct ieee80211_channel *chan); 501 502 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 503 { 504 unsigned long end = jiffies; 505 506 if (end >= start) 507 return jiffies_to_msecs(end - start); 508 509 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 510 } 511 512 void 513 cfg80211_get_chan_state(struct wireless_dev *wdev, 514 struct ieee80211_channel **chan, 515 enum cfg80211_chan_mode *chanmode, 516 u8 *radar_detect); 517 518 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 519 struct cfg80211_chan_def *chandef); 520 521 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 522 const u8 *rates, unsigned int n_rates, 523 u32 *mask); 524 525 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 526 enum nl80211_iftype iftype, u32 beacon_int); 527 528 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 529 enum nl80211_iftype iftype, int num); 530 531 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 532 struct wireless_dev *wdev); 533 void cfg80211_leave(struct cfg80211_registered_device *rdev, 534 struct wireless_dev *wdev); 535 536 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 537 struct wireless_dev *wdev); 538 539 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 540 struct wireless_dev *wdev); 541 542 struct cfg80211_internal_bss * 543 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 544 struct cfg80211_internal_bss *tmp, 545 bool signal_valid, unsigned long ts); 546 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 547 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 548 #else 549 /* 550 * Trick to enable using it as a condition, 551 * and also not give a warning when it's 552 * not used that way. 553 */ 554 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 555 #endif 556 557 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 558 559 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 560 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 561 void cfg80211_pmsr_free_wk(struct work_struct *work); 562 563 #endif /* __NET_WIRELESS_CORE_H */ 564