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; 103 104 /* must be last because of the way we do wiphy_priv(), 105 * and it should at least be aligned to NETDEV_ALIGN */ 106 struct wiphy wiphy __aligned(NETDEV_ALIGN); 107 }; 108 109 static inline 110 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 111 { 112 BUG_ON(!wiphy); 113 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 114 } 115 116 static inline void 117 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 118 { 119 #ifdef CONFIG_PM 120 int i; 121 122 if (!rdev->wiphy.wowlan_config) 123 return; 124 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 125 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 126 kfree(rdev->wiphy.wowlan_config->patterns); 127 if (rdev->wiphy.wowlan_config->tcp && 128 rdev->wiphy.wowlan_config->tcp->sock) 129 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 130 kfree(rdev->wiphy.wowlan_config->tcp); 131 kfree(rdev->wiphy.wowlan_config->nd_config); 132 kfree(rdev->wiphy.wowlan_config); 133 #endif 134 } 135 136 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) 137 { 138 u64 r = ++rdev->cookie_counter; 139 140 if (WARN_ON(r == 0)) 141 r = ++rdev->cookie_counter; 142 143 return r; 144 } 145 146 extern struct workqueue_struct *cfg80211_wq; 147 extern struct list_head cfg80211_rdev_list; 148 extern int cfg80211_rdev_list_generation; 149 150 struct cfg80211_internal_bss { 151 struct list_head list; 152 struct list_head hidden_list; 153 struct rb_node rbn; 154 u64 ts_boottime; 155 unsigned long ts; 156 unsigned long refcount; 157 atomic_t hold; 158 159 /* time at the start of the reception of the first octet of the 160 * timestamp field of the last beacon/probe received for this BSS. 161 * The time is the TSF of the BSS specified by %parent_bssid. 162 */ 163 u64 parent_tsf; 164 165 /* the BSS according to which %parent_tsf is set. This is set to 166 * the BSS that the interface that requested the scan was connected to 167 * when the beacon/probe was received. 168 */ 169 u8 parent_bssid[ETH_ALEN] __aligned(2); 170 171 /* must be last because of priv member */ 172 struct cfg80211_bss pub; 173 }; 174 175 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 176 { 177 return container_of(pub, struct cfg80211_internal_bss, pub); 178 } 179 180 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 181 { 182 atomic_inc(&bss->hold); 183 if (bss->pub.transmitted_bss) { 184 bss = container_of(bss->pub.transmitted_bss, 185 struct cfg80211_internal_bss, pub); 186 atomic_inc(&bss->hold); 187 } 188 } 189 190 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 191 { 192 int r = atomic_dec_return(&bss->hold); 193 WARN_ON(r < 0); 194 if (bss->pub.transmitted_bss) { 195 bss = container_of(bss->pub.transmitted_bss, 196 struct cfg80211_internal_bss, pub); 197 r = atomic_dec_return(&bss->hold); 198 WARN_ON(r < 0); 199 } 200 } 201 202 203 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 204 int get_wiphy_idx(struct wiphy *wiphy); 205 206 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 207 208 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 209 struct net *net); 210 211 void cfg80211_init_wdev(struct wireless_dev *wdev); 212 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 213 struct wireless_dev *wdev); 214 215 static inline void wdev_lock(struct wireless_dev *wdev) 216 __acquires(wdev) 217 { 218 mutex_lock(&wdev->mtx); 219 __acquire(wdev->mtx); 220 } 221 222 static inline void wdev_unlock(struct wireless_dev *wdev) 223 __releases(wdev) 224 { 225 __release(wdev->mtx); 226 mutex_unlock(&wdev->mtx); 227 } 228 229 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 230 231 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 232 { 233 lockdep_assert_held(&rdev->wiphy.mtx); 234 235 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 236 rdev->num_running_ifaces > 0; 237 } 238 239 enum cfg80211_event_type { 240 EVENT_CONNECT_RESULT, 241 EVENT_ROAMED, 242 EVENT_DISCONNECTED, 243 EVENT_IBSS_JOINED, 244 EVENT_STOPPED, 245 EVENT_PORT_AUTHORIZED, 246 }; 247 248 struct cfg80211_event { 249 struct list_head list; 250 enum cfg80211_event_type type; 251 252 union { 253 struct cfg80211_connect_resp_params cr; 254 struct cfg80211_roam_info rm; 255 struct { 256 const u8 *ie; 257 size_t ie_len; 258 u16 reason; 259 bool locally_generated; 260 } dc; 261 struct { 262 u8 bssid[ETH_ALEN]; 263 struct ieee80211_channel *channel; 264 } ij; 265 struct { 266 u8 bssid[ETH_ALEN]; 267 } pa; 268 }; 269 }; 270 271 struct cfg80211_cached_keys { 272 struct key_params params[CFG80211_MAX_WEP_KEYS]; 273 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 274 int def; 275 }; 276 277 enum cfg80211_chan_mode { 278 CHAN_MODE_UNDEFINED, 279 CHAN_MODE_SHARED, 280 CHAN_MODE_EXCLUSIVE, 281 }; 282 283 struct cfg80211_beacon_registration { 284 struct list_head list; 285 u32 nlportid; 286 }; 287 288 struct cfg80211_cqm_config { 289 u32 rssi_hyst; 290 s32 last_rssi_event_value; 291 int n_rssi_thresholds; 292 s32 rssi_thresholds[]; 293 }; 294 295 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 296 297 /* free object */ 298 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 299 300 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 301 char *newname); 302 303 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 304 305 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 306 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 307 unsigned long age_secs); 308 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 309 struct ieee80211_channel *channel); 310 311 /* IBSS */ 312 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 313 struct net_device *dev, 314 struct cfg80211_ibss_params *params, 315 struct cfg80211_cached_keys *connkeys); 316 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 317 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 318 struct net_device *dev, bool nowext); 319 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 320 struct net_device *dev, bool nowext); 321 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 322 struct ieee80211_channel *channel); 323 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 324 struct wireless_dev *wdev); 325 326 /* mesh */ 327 extern const struct mesh_config default_mesh_config; 328 extern const struct mesh_setup default_mesh_setup; 329 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 330 struct net_device *dev, 331 struct mesh_setup *setup, 332 const struct mesh_config *conf); 333 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 334 struct net_device *dev); 335 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 336 struct net_device *dev); 337 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 338 struct wireless_dev *wdev, 339 struct cfg80211_chan_def *chandef); 340 341 /* OCB */ 342 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 343 struct net_device *dev, 344 struct ocb_setup *setup); 345 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 346 struct net_device *dev, 347 struct ocb_setup *setup); 348 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 349 struct net_device *dev); 350 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 351 struct net_device *dev); 352 353 /* AP */ 354 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 355 struct net_device *dev, bool notify); 356 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 357 struct net_device *dev, bool notify); 358 359 /* MLME */ 360 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 361 struct net_device *dev, 362 struct ieee80211_channel *chan, 363 enum nl80211_auth_type auth_type, 364 const u8 *bssid, 365 const u8 *ssid, int ssid_len, 366 const u8 *ie, int ie_len, 367 const u8 *key, int key_len, int key_idx, 368 const u8 *auth_data, int auth_data_len); 369 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 370 struct net_device *dev, 371 struct ieee80211_channel *chan, 372 const u8 *bssid, 373 const u8 *ssid, int ssid_len, 374 struct cfg80211_assoc_request *req); 375 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 376 struct net_device *dev, const u8 *bssid, 377 const u8 *ie, int ie_len, u16 reason, 378 bool local_state_change); 379 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 380 struct net_device *dev, const u8 *bssid, 381 const u8 *ie, int ie_len, u16 reason, 382 bool local_state_change); 383 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 384 struct net_device *dev); 385 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 386 u16 frame_type, const u8 *match_data, 387 int match_len, bool multicast_rx, 388 struct netlink_ext_ack *extack); 389 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 390 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 391 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 392 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 393 struct wireless_dev *wdev, 394 struct cfg80211_mgmt_tx_params *params, 395 u64 *cookie); 396 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 397 const struct ieee80211_ht_cap *ht_capa_mask); 398 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 399 const struct ieee80211_vht_cap *vht_capa_mask); 400 401 /* SME events */ 402 int cfg80211_connect(struct cfg80211_registered_device *rdev, 403 struct net_device *dev, 404 struct cfg80211_connect_params *connect, 405 struct cfg80211_cached_keys *connkeys, 406 const u8 *prev_bssid); 407 void __cfg80211_connect_result(struct net_device *dev, 408 struct cfg80211_connect_resp_params *params, 409 bool wextev); 410 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 411 size_t ie_len, u16 reason, bool from_ap); 412 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 413 struct net_device *dev, u16 reason, 414 bool wextev); 415 void __cfg80211_roamed(struct wireless_dev *wdev, 416 struct cfg80211_roam_info *info); 417 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 418 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 419 struct wireless_dev *wdev); 420 void cfg80211_autodisconnect_wk(struct work_struct *work); 421 422 /* SME implementation */ 423 void cfg80211_conn_work(struct work_struct *work); 424 void cfg80211_sme_scan_done(struct net_device *dev); 425 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 426 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 427 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 428 void cfg80211_sme_deauth(struct wireless_dev *wdev); 429 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 430 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 431 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 432 433 /* internal helpers */ 434 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 435 bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, 436 int key_idx, bool pairwise); 437 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 438 struct key_params *params, int key_idx, 439 bool pairwise, const u8 *mac_addr); 440 void __cfg80211_scan_done(struct work_struct *wk); 441 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 442 bool send_message); 443 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 444 struct cfg80211_sched_scan_request *req); 445 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 446 bool want_multi); 447 void cfg80211_sched_scan_results_wk(struct work_struct *work); 448 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 449 struct cfg80211_sched_scan_request *req, 450 bool driver_initiated); 451 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 452 u64 reqid, bool driver_initiated); 453 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 454 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 455 struct net_device *dev, enum nl80211_iftype ntype, 456 struct vif_params *params); 457 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 458 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 459 460 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 461 u32 center_freq_khz, u32 bw_khz); 462 463 int cfg80211_scan(struct cfg80211_registered_device *rdev); 464 465 extern struct work_struct cfg80211_disconnect_work; 466 467 /** 468 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 469 * @wiphy: the wiphy to validate against 470 * @chandef: the channel definition to check 471 * 472 * Checks if chandef is usable and we can/need start CAC on such channel. 473 * 474 * Return: true if all channels available and at least 475 * one channel requires CAC (NL80211_DFS_USABLE) 476 */ 477 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 478 const struct cfg80211_chan_def *chandef); 479 480 void cfg80211_set_dfs_state(struct wiphy *wiphy, 481 const struct cfg80211_chan_def *chandef, 482 enum nl80211_dfs_state dfs_state); 483 484 void cfg80211_dfs_channels_update_work(struct work_struct *work); 485 486 unsigned int 487 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 488 const struct cfg80211_chan_def *chandef); 489 490 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 491 492 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 493 struct ieee80211_channel *chan); 494 495 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 496 497 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 498 struct ieee80211_channel *chan); 499 500 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 501 { 502 unsigned long end = jiffies; 503 504 if (end >= start) 505 return jiffies_to_msecs(end - start); 506 507 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 508 } 509 510 void 511 cfg80211_get_chan_state(struct wireless_dev *wdev, 512 struct ieee80211_channel **chan, 513 enum cfg80211_chan_mode *chanmode, 514 u8 *radar_detect); 515 516 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 517 struct cfg80211_chan_def *chandef); 518 519 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 520 const u8 *rates, unsigned int n_rates, 521 u32 *mask); 522 523 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 524 enum nl80211_iftype iftype, u32 beacon_int); 525 526 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 527 enum nl80211_iftype iftype, int num); 528 529 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 530 struct wireless_dev *wdev); 531 void cfg80211_leave(struct cfg80211_registered_device *rdev, 532 struct wireless_dev *wdev); 533 534 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 535 struct wireless_dev *wdev); 536 537 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 538 struct wireless_dev *wdev); 539 540 struct cfg80211_internal_bss * 541 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 542 struct cfg80211_internal_bss *tmp, 543 bool signal_valid, unsigned long ts); 544 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 545 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 546 #else 547 /* 548 * Trick to enable using it as a condition, 549 * and also not give a warning when it's 550 * not used that way. 551 */ 552 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 553 #endif 554 555 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 556 557 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 558 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 559 void cfg80211_pmsr_free_wk(struct work_struct *work); 560 561 #endif /* __NET_WIRELESS_CORE_H */ 562