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 wireless_dev *wdev); 213 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 214 struct wireless_dev *wdev); 215 216 static inline void wdev_lock(struct wireless_dev *wdev) 217 __acquires(wdev) 218 { 219 mutex_lock(&wdev->mtx); 220 __acquire(wdev->mtx); 221 } 222 223 static inline void wdev_unlock(struct wireless_dev *wdev) 224 __releases(wdev) 225 { 226 __release(wdev->mtx); 227 mutex_unlock(&wdev->mtx); 228 } 229 230 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 231 232 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 233 { 234 lockdep_assert_held(&rdev->wiphy.mtx); 235 236 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 237 rdev->num_running_ifaces > 0; 238 } 239 240 enum cfg80211_event_type { 241 EVENT_CONNECT_RESULT, 242 EVENT_ROAMED, 243 EVENT_DISCONNECTED, 244 EVENT_IBSS_JOINED, 245 EVENT_STOPPED, 246 EVENT_PORT_AUTHORIZED, 247 }; 248 249 struct cfg80211_event { 250 struct list_head list; 251 enum cfg80211_event_type type; 252 253 union { 254 struct cfg80211_connect_resp_params cr; 255 struct cfg80211_roam_info rm; 256 struct { 257 const u8 *ie; 258 size_t ie_len; 259 u16 reason; 260 bool locally_generated; 261 } dc; 262 struct { 263 u8 bssid[ETH_ALEN]; 264 struct ieee80211_channel *channel; 265 } ij; 266 struct { 267 u8 bssid[ETH_ALEN]; 268 } pa; 269 }; 270 }; 271 272 struct cfg80211_cached_keys { 273 struct key_params params[CFG80211_MAX_WEP_KEYS]; 274 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 275 int def; 276 }; 277 278 enum cfg80211_chan_mode { 279 CHAN_MODE_UNDEFINED, 280 CHAN_MODE_SHARED, 281 CHAN_MODE_EXCLUSIVE, 282 }; 283 284 struct cfg80211_beacon_registration { 285 struct list_head list; 286 u32 nlportid; 287 }; 288 289 struct cfg80211_cqm_config { 290 u32 rssi_hyst; 291 s32 last_rssi_event_value; 292 int n_rssi_thresholds; 293 s32 rssi_thresholds[]; 294 }; 295 296 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 297 298 /* free object */ 299 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 300 301 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 302 char *newname); 303 304 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 305 306 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 307 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 308 unsigned long age_secs); 309 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 310 struct ieee80211_channel *channel); 311 312 /* IBSS */ 313 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 314 struct net_device *dev, 315 struct cfg80211_ibss_params *params, 316 struct cfg80211_cached_keys *connkeys); 317 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 318 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 319 struct net_device *dev, bool nowext); 320 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 321 struct net_device *dev, bool nowext); 322 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 323 struct ieee80211_channel *channel); 324 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 325 struct wireless_dev *wdev); 326 327 /* mesh */ 328 extern const struct mesh_config default_mesh_config; 329 extern const struct mesh_setup default_mesh_setup; 330 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 331 struct net_device *dev, 332 struct mesh_setup *setup, 333 const struct mesh_config *conf); 334 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 335 struct net_device *dev); 336 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 337 struct net_device *dev); 338 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 339 struct wireless_dev *wdev, 340 struct cfg80211_chan_def *chandef); 341 342 /* OCB */ 343 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 344 struct net_device *dev, 345 struct ocb_setup *setup); 346 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 347 struct net_device *dev, 348 struct ocb_setup *setup); 349 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 350 struct net_device *dev); 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, bool notify); 357 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 358 struct net_device *dev, bool notify); 359 360 /* MLME */ 361 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 362 struct net_device *dev, 363 struct ieee80211_channel *chan, 364 enum nl80211_auth_type auth_type, 365 const u8 *bssid, 366 const u8 *ssid, int ssid_len, 367 const u8 *ie, int ie_len, 368 const u8 *key, int key_len, int key_idx, 369 const u8 *auth_data, int auth_data_len); 370 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 371 struct net_device *dev, 372 struct ieee80211_channel *chan, 373 const u8 *bssid, 374 const u8 *ssid, int ssid_len, 375 struct cfg80211_assoc_request *req); 376 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 377 struct net_device *dev, const u8 *bssid, 378 const u8 *ie, int ie_len, u16 reason, 379 bool local_state_change); 380 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 381 struct net_device *dev, const u8 *bssid, 382 const u8 *ie, int ie_len, u16 reason, 383 bool local_state_change); 384 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 385 struct net_device *dev); 386 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 387 u16 frame_type, const u8 *match_data, 388 int match_len, bool multicast_rx, 389 struct netlink_ext_ack *extack); 390 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 391 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 392 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 393 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 394 struct wireless_dev *wdev, 395 struct cfg80211_mgmt_tx_params *params, 396 u64 *cookie); 397 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 398 const struct ieee80211_ht_cap *ht_capa_mask); 399 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 400 const struct ieee80211_vht_cap *vht_capa_mask); 401 402 /* SME events */ 403 int cfg80211_connect(struct cfg80211_registered_device *rdev, 404 struct net_device *dev, 405 struct cfg80211_connect_params *connect, 406 struct cfg80211_cached_keys *connkeys, 407 const u8 *prev_bssid); 408 void __cfg80211_connect_result(struct net_device *dev, 409 struct cfg80211_connect_resp_params *params, 410 bool wextev); 411 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 412 size_t ie_len, u16 reason, bool from_ap); 413 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 414 struct net_device *dev, u16 reason, 415 bool wextev); 416 void __cfg80211_roamed(struct wireless_dev *wdev, 417 struct cfg80211_roam_info *info); 418 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 419 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 420 struct wireless_dev *wdev); 421 void cfg80211_autodisconnect_wk(struct work_struct *work); 422 423 /* SME implementation */ 424 void cfg80211_conn_work(struct work_struct *work); 425 void cfg80211_sme_scan_done(struct net_device *dev); 426 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 427 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 428 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 429 void cfg80211_sme_deauth(struct wireless_dev *wdev); 430 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 431 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 432 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 433 434 /* internal helpers */ 435 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 436 bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, 437 int key_idx, bool pairwise); 438 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 439 struct key_params *params, int key_idx, 440 bool pairwise, const u8 *mac_addr); 441 void __cfg80211_scan_done(struct work_struct *wk); 442 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 443 bool send_message); 444 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 445 struct cfg80211_sched_scan_request *req); 446 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 447 bool want_multi); 448 void cfg80211_sched_scan_results_wk(struct work_struct *work); 449 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 450 struct cfg80211_sched_scan_request *req, 451 bool driver_initiated); 452 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 453 u64 reqid, bool driver_initiated); 454 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 455 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 456 struct net_device *dev, enum nl80211_iftype ntype, 457 struct vif_params *params); 458 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 459 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 460 461 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 462 u32 center_freq_khz, u32 bw_khz); 463 464 int cfg80211_scan(struct cfg80211_registered_device *rdev); 465 466 extern struct work_struct cfg80211_disconnect_work; 467 468 /** 469 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 470 * @wiphy: the wiphy to validate against 471 * @chandef: the channel definition to check 472 * 473 * Checks if chandef is usable and we can/need start CAC on such channel. 474 * 475 * Return: true if all channels available and at least 476 * one channel requires CAC (NL80211_DFS_USABLE) 477 */ 478 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 479 const struct cfg80211_chan_def *chandef); 480 481 void cfg80211_set_dfs_state(struct wiphy *wiphy, 482 const struct cfg80211_chan_def *chandef, 483 enum nl80211_dfs_state dfs_state); 484 485 void cfg80211_dfs_channels_update_work(struct work_struct *work); 486 487 unsigned int 488 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 489 const struct cfg80211_chan_def *chandef); 490 491 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 492 493 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 494 struct ieee80211_channel *chan); 495 496 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 497 498 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 499 struct ieee80211_channel *chan); 500 501 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 502 { 503 unsigned long end = jiffies; 504 505 if (end >= start) 506 return jiffies_to_msecs(end - start); 507 508 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 509 } 510 511 void 512 cfg80211_get_chan_state(struct wireless_dev *wdev, 513 struct ieee80211_channel **chan, 514 enum cfg80211_chan_mode *chanmode, 515 u8 *radar_detect); 516 517 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 518 struct cfg80211_chan_def *chandef); 519 520 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 521 const u8 *rates, unsigned int n_rates, 522 u32 *mask); 523 524 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 525 enum nl80211_iftype iftype, u32 beacon_int); 526 527 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 528 enum nl80211_iftype iftype, int num); 529 530 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 531 struct wireless_dev *wdev); 532 void cfg80211_leave(struct cfg80211_registered_device *rdev, 533 struct wireless_dev *wdev); 534 535 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 536 struct wireless_dev *wdev); 537 538 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 539 struct wireless_dev *wdev); 540 541 struct cfg80211_internal_bss * 542 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 543 struct cfg80211_internal_bss *tmp, 544 bool signal_valid, unsigned long ts); 545 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 546 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 547 #else 548 /* 549 * Trick to enable using it as a condition, 550 * and also not give a warning when it's 551 * not used that way. 552 */ 553 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 554 #endif 555 556 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 557 558 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 559 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 560 void cfg80211_pmsr_free_wk(struct work_struct *work); 561 562 #endif /* __NET_WIRELESS_CORE_H */ 563