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) 2018-2020 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 rfkill *rfkill; 31 struct work_struct rfkill_block; 32 33 /* ISO / IEC 3166 alpha2 for which this device is receiving 34 * country IEs on, this can help disregard country IEs from APs 35 * on the same alpha2 quickly. The alpha2 may differ from 36 * cfg80211_regdomain's alpha2 when an intersection has occurred. 37 * If the AP is reconfigured this can also be used to tell us if 38 * the country on the country IE changed. */ 39 char country_ie_alpha2[2]; 40 41 /* 42 * the driver requests the regulatory core to set this regulatory 43 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED 44 * devices using the regulatory_set_wiphy_regd() API 45 */ 46 const struct ieee80211_regdomain *requested_regd; 47 48 /* If a Country IE has been received this tells us the environment 49 * which its telling us its in. This defaults to ENVIRON_ANY */ 50 enum environment_cap env; 51 52 /* wiphy index, internal only */ 53 int wiphy_idx; 54 55 /* protected by RTNL */ 56 int devlist_generation, wdev_id; 57 int opencount; 58 wait_queue_head_t dev_wait; 59 60 struct list_head beacon_registrations; 61 spinlock_t beacon_registrations_lock; 62 63 /* protected by RTNL only */ 64 int num_running_ifaces; 65 int num_running_monitor_ifaces; 66 u64 cookie_counter; 67 68 /* BSSes/scanning */ 69 spinlock_t bss_lock; 70 struct list_head bss_list; 71 struct rb_root bss_tree; 72 u32 bss_generation; 73 u32 bss_entries; 74 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 75 struct cfg80211_scan_request *int_scan_req; 76 struct sk_buff *scan_msg; 77 struct list_head sched_scan_req_list; 78 time64_t suspend_at; 79 struct work_struct scan_done_wk; 80 81 struct genl_info *cur_cmd_info; 82 83 struct work_struct conn_work; 84 struct work_struct event_work; 85 86 struct delayed_work dfs_update_channels_wk; 87 88 /* netlink port which started critical protocol (0 means not started) */ 89 u32 crit_proto_nlportid; 90 91 struct cfg80211_coalesce *coalesce; 92 93 struct work_struct destroy_work; 94 struct work_struct sched_scan_stop_wk; 95 struct work_struct sched_scan_res_wk; 96 97 struct cfg80211_chan_def radar_chandef; 98 struct work_struct propagate_radar_detect_wk; 99 100 struct cfg80211_chan_def cac_done_chandef; 101 struct work_struct propagate_cac_done_wk; 102 103 struct work_struct mgmt_registrations_update_wk; 104 105 /* must be last because of the way we do wiphy_priv(), 106 * and it should at least be aligned to NETDEV_ALIGN */ 107 struct wiphy wiphy __aligned(NETDEV_ALIGN); 108 }; 109 110 static inline 111 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 112 { 113 BUG_ON(!wiphy); 114 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 115 } 116 117 static inline void 118 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 119 { 120 #ifdef CONFIG_PM 121 int i; 122 123 if (!rdev->wiphy.wowlan_config) 124 return; 125 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 126 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 127 kfree(rdev->wiphy.wowlan_config->patterns); 128 if (rdev->wiphy.wowlan_config->tcp && 129 rdev->wiphy.wowlan_config->tcp->sock) 130 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 131 kfree(rdev->wiphy.wowlan_config->tcp); 132 kfree(rdev->wiphy.wowlan_config->nd_config); 133 kfree(rdev->wiphy.wowlan_config); 134 #endif 135 } 136 137 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) 138 { 139 u64 r = ++rdev->cookie_counter; 140 141 if (WARN_ON(r == 0)) 142 r = ++rdev->cookie_counter; 143 144 return r; 145 } 146 147 extern struct workqueue_struct *cfg80211_wq; 148 extern struct list_head cfg80211_rdev_list; 149 extern int cfg80211_rdev_list_generation; 150 151 struct cfg80211_internal_bss { 152 struct list_head list; 153 struct list_head hidden_list; 154 struct rb_node rbn; 155 u64 ts_boottime; 156 unsigned long ts; 157 unsigned long refcount; 158 atomic_t hold; 159 160 /* time at the start of the reception of the first octet of the 161 * timestamp field of the last beacon/probe received for this BSS. 162 * The time is the TSF of the BSS specified by %parent_bssid. 163 */ 164 u64 parent_tsf; 165 166 /* the BSS according to which %parent_tsf is set. This is set to 167 * the BSS that the interface that requested the scan was connected to 168 * when the beacon/probe was received. 169 */ 170 u8 parent_bssid[ETH_ALEN] __aligned(2); 171 172 /* must be last because of priv member */ 173 struct cfg80211_bss pub; 174 }; 175 176 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 177 { 178 return container_of(pub, struct cfg80211_internal_bss, pub); 179 } 180 181 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 182 { 183 atomic_inc(&bss->hold); 184 if (bss->pub.transmitted_bss) { 185 bss = container_of(bss->pub.transmitted_bss, 186 struct cfg80211_internal_bss, pub); 187 atomic_inc(&bss->hold); 188 } 189 } 190 191 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 192 { 193 int r = atomic_dec_return(&bss->hold); 194 WARN_ON(r < 0); 195 if (bss->pub.transmitted_bss) { 196 bss = container_of(bss->pub.transmitted_bss, 197 struct cfg80211_internal_bss, pub); 198 r = atomic_dec_return(&bss->hold); 199 WARN_ON(r < 0); 200 } 201 } 202 203 204 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 205 int get_wiphy_idx(struct wiphy *wiphy); 206 207 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 208 209 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 210 struct net *net); 211 212 void cfg80211_init_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 ASSERT_RTNL(); 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 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 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 491 struct ieee80211_channel *chan); 492 493 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 494 495 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 496 struct ieee80211_channel *chan); 497 498 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 499 { 500 unsigned long end = jiffies; 501 502 if (end >= start) 503 return jiffies_to_msecs(end - start); 504 505 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 506 } 507 508 void 509 cfg80211_get_chan_state(struct wireless_dev *wdev, 510 struct ieee80211_channel **chan, 511 enum cfg80211_chan_mode *chanmode, 512 u8 *radar_detect); 513 514 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 515 struct cfg80211_chan_def *chandef); 516 517 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 518 const u8 *rates, unsigned int n_rates, 519 u32 *mask); 520 521 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 522 enum nl80211_iftype iftype, u32 beacon_int); 523 524 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 525 enum nl80211_iftype iftype, int num); 526 527 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 528 struct wireless_dev *wdev); 529 void cfg80211_leave(struct cfg80211_registered_device *rdev, 530 struct wireless_dev *wdev); 531 532 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 533 struct wireless_dev *wdev); 534 535 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 536 struct wireless_dev *wdev); 537 538 struct cfg80211_internal_bss * 539 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 540 struct cfg80211_internal_bss *tmp, 541 bool signal_valid, unsigned long ts); 542 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 543 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 544 #else 545 /* 546 * Trick to enable using it as a condition, 547 * and also not give a warning when it's 548 * not used that way. 549 */ 550 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 551 #endif 552 553 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 554 555 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 556 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 557 void cfg80211_pmsr_free_wk(struct work_struct *work); 558 559 #endif /* __NET_WIRELESS_CORE_H */ 560