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) 2018-2019 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 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 /* must be last because of the way we do wiphy_priv(), 103 * and it should at least be aligned to NETDEV_ALIGN */ 104 struct wiphy wiphy __aligned(NETDEV_ALIGN); 105 }; 106 107 static inline 108 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 109 { 110 BUG_ON(!wiphy); 111 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 112 } 113 114 static inline void 115 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 116 { 117 #ifdef CONFIG_PM 118 int i; 119 120 if (!rdev->wiphy.wowlan_config) 121 return; 122 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 123 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 124 kfree(rdev->wiphy.wowlan_config->patterns); 125 if (rdev->wiphy.wowlan_config->tcp && 126 rdev->wiphy.wowlan_config->tcp->sock) 127 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 128 kfree(rdev->wiphy.wowlan_config->tcp); 129 kfree(rdev->wiphy.wowlan_config->nd_config); 130 kfree(rdev->wiphy.wowlan_config); 131 #endif 132 } 133 134 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) 135 { 136 u64 r = ++rdev->cookie_counter; 137 138 if (WARN_ON(r == 0)) 139 r = ++rdev->cookie_counter; 140 141 return r; 142 } 143 144 extern struct workqueue_struct *cfg80211_wq; 145 extern struct list_head cfg80211_rdev_list; 146 extern int cfg80211_rdev_list_generation; 147 148 struct cfg80211_internal_bss { 149 struct list_head list; 150 struct list_head hidden_list; 151 struct rb_node rbn; 152 u64 ts_boottime; 153 unsigned long ts; 154 unsigned long refcount; 155 atomic_t hold; 156 157 /* time at the start of the reception of the first octet of the 158 * timestamp field of the last beacon/probe received for this BSS. 159 * The time is the TSF of the BSS specified by %parent_bssid. 160 */ 161 u64 parent_tsf; 162 163 /* the BSS according to which %parent_tsf is set. This is set to 164 * the BSS that the interface that requested the scan was connected to 165 * when the beacon/probe was received. 166 */ 167 u8 parent_bssid[ETH_ALEN] __aligned(2); 168 169 /* must be last because of priv member */ 170 struct cfg80211_bss pub; 171 }; 172 173 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 174 { 175 return container_of(pub, struct cfg80211_internal_bss, pub); 176 } 177 178 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 179 { 180 atomic_inc(&bss->hold); 181 if (bss->pub.transmitted_bss) { 182 bss = container_of(bss->pub.transmitted_bss, 183 struct cfg80211_internal_bss, pub); 184 atomic_inc(&bss->hold); 185 } 186 } 187 188 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 189 { 190 int r = atomic_dec_return(&bss->hold); 191 WARN_ON(r < 0); 192 if (bss->pub.transmitted_bss) { 193 bss = container_of(bss->pub.transmitted_bss, 194 struct cfg80211_internal_bss, pub); 195 r = atomic_dec_return(&bss->hold); 196 WARN_ON(r < 0); 197 } 198 } 199 200 201 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 202 int get_wiphy_idx(struct wiphy *wiphy); 203 204 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 205 206 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 207 struct net *net); 208 209 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev, 210 struct wireless_dev *wdev); 211 212 static inline void wdev_lock(struct wireless_dev *wdev) 213 __acquires(wdev) 214 { 215 mutex_lock(&wdev->mtx); 216 __acquire(wdev->mtx); 217 } 218 219 static inline void wdev_unlock(struct wireless_dev *wdev) 220 __releases(wdev) 221 { 222 __release(wdev->mtx); 223 mutex_unlock(&wdev->mtx); 224 } 225 226 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 227 228 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 229 { 230 ASSERT_RTNL(); 231 232 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 233 rdev->num_running_ifaces > 0; 234 } 235 236 enum cfg80211_event_type { 237 EVENT_CONNECT_RESULT, 238 EVENT_ROAMED, 239 EVENT_DISCONNECTED, 240 EVENT_IBSS_JOINED, 241 EVENT_STOPPED, 242 EVENT_PORT_AUTHORIZED, 243 }; 244 245 struct cfg80211_event { 246 struct list_head list; 247 enum cfg80211_event_type type; 248 249 union { 250 struct cfg80211_connect_resp_params cr; 251 struct cfg80211_roam_info rm; 252 struct { 253 const u8 *ie; 254 size_t ie_len; 255 u16 reason; 256 bool locally_generated; 257 } dc; 258 struct { 259 u8 bssid[ETH_ALEN]; 260 struct ieee80211_channel *channel; 261 } ij; 262 struct { 263 u8 bssid[ETH_ALEN]; 264 } pa; 265 }; 266 }; 267 268 struct cfg80211_cached_keys { 269 struct key_params params[CFG80211_MAX_WEP_KEYS]; 270 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 271 int def; 272 }; 273 274 enum cfg80211_chan_mode { 275 CHAN_MODE_UNDEFINED, 276 CHAN_MODE_SHARED, 277 CHAN_MODE_EXCLUSIVE, 278 }; 279 280 struct cfg80211_beacon_registration { 281 struct list_head list; 282 u32 nlportid; 283 }; 284 285 struct cfg80211_cqm_config { 286 u32 rssi_hyst; 287 s32 last_rssi_event_value; 288 int n_rssi_thresholds; 289 s32 rssi_thresholds[]; 290 }; 291 292 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 293 294 /* free object */ 295 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 296 297 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 298 char *newname); 299 300 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 301 302 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 303 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 304 unsigned long age_secs); 305 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 306 struct ieee80211_channel *channel); 307 308 /* IBSS */ 309 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 310 struct net_device *dev, 311 struct cfg80211_ibss_params *params, 312 struct cfg80211_cached_keys *connkeys); 313 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 314 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 315 struct net_device *dev, bool nowext); 316 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 317 struct net_device *dev, bool nowext); 318 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 319 struct ieee80211_channel *channel); 320 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 321 struct wireless_dev *wdev); 322 323 /* mesh */ 324 extern const struct mesh_config default_mesh_config; 325 extern const struct mesh_setup default_mesh_setup; 326 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 327 struct net_device *dev, 328 struct mesh_setup *setup, 329 const struct mesh_config *conf); 330 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 331 struct net_device *dev); 332 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 333 struct net_device *dev); 334 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 335 struct wireless_dev *wdev, 336 struct cfg80211_chan_def *chandef); 337 338 /* OCB */ 339 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 340 struct net_device *dev, 341 struct ocb_setup *setup); 342 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 343 struct net_device *dev, 344 struct ocb_setup *setup); 345 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 346 struct net_device *dev); 347 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 348 struct net_device *dev); 349 350 /* AP */ 351 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 352 struct net_device *dev, bool notify); 353 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 354 struct net_device *dev, bool notify); 355 356 /* MLME */ 357 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 358 struct net_device *dev, 359 struct ieee80211_channel *chan, 360 enum nl80211_auth_type auth_type, 361 const u8 *bssid, 362 const u8 *ssid, int ssid_len, 363 const u8 *ie, int ie_len, 364 const u8 *key, int key_len, int key_idx, 365 const u8 *auth_data, int auth_data_len); 366 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 367 struct net_device *dev, 368 struct ieee80211_channel *chan, 369 const u8 *bssid, 370 const u8 *ssid, int ssid_len, 371 struct cfg80211_assoc_request *req); 372 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 373 struct net_device *dev, const u8 *bssid, 374 const u8 *ie, int ie_len, u16 reason, 375 bool local_state_change); 376 int cfg80211_mlme_disassoc(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 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 381 struct net_device *dev); 382 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 383 u16 frame_type, const u8 *match_data, 384 int match_len, bool multicast_rx, 385 struct netlink_ext_ack *extack); 386 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 387 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 388 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 389 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 390 struct wireless_dev *wdev, 391 struct cfg80211_mgmt_tx_params *params, 392 u64 *cookie); 393 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 394 const struct ieee80211_ht_cap *ht_capa_mask); 395 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 396 const struct ieee80211_vht_cap *vht_capa_mask); 397 398 /* SME events */ 399 int cfg80211_connect(struct cfg80211_registered_device *rdev, 400 struct net_device *dev, 401 struct cfg80211_connect_params *connect, 402 struct cfg80211_cached_keys *connkeys, 403 const u8 *prev_bssid); 404 void __cfg80211_connect_result(struct net_device *dev, 405 struct cfg80211_connect_resp_params *params, 406 bool wextev); 407 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 408 size_t ie_len, u16 reason, bool from_ap); 409 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 410 struct net_device *dev, u16 reason, 411 bool wextev); 412 void __cfg80211_roamed(struct wireless_dev *wdev, 413 struct cfg80211_roam_info *info); 414 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 415 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 416 struct wireless_dev *wdev); 417 void cfg80211_autodisconnect_wk(struct work_struct *work); 418 419 /* SME implementation */ 420 void cfg80211_conn_work(struct work_struct *work); 421 void cfg80211_sme_scan_done(struct net_device *dev); 422 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 423 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 424 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 425 void cfg80211_sme_deauth(struct wireless_dev *wdev); 426 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 427 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 428 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 429 430 /* internal helpers */ 431 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 432 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 433 struct key_params *params, int key_idx, 434 bool pairwise, const u8 *mac_addr); 435 void __cfg80211_scan_done(struct work_struct *wk); 436 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 437 bool send_message); 438 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 439 struct cfg80211_sched_scan_request *req); 440 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 441 bool want_multi); 442 void cfg80211_sched_scan_results_wk(struct work_struct *work); 443 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 444 struct cfg80211_sched_scan_request *req, 445 bool driver_initiated); 446 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 447 u64 reqid, bool driver_initiated); 448 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 449 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 450 struct net_device *dev, enum nl80211_iftype ntype, 451 struct vif_params *params); 452 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 453 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 454 455 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 456 u32 center_freq_khz, u32 bw_khz); 457 458 extern struct work_struct cfg80211_disconnect_work; 459 460 /** 461 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 462 * @wiphy: the wiphy to validate against 463 * @chandef: the channel definition to check 464 * 465 * Checks if chandef is usable and we can/need start CAC on such channel. 466 * 467 * Return: Return true if all channels available and at least 468 * one channel require CAC (NL80211_DFS_USABLE) 469 */ 470 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 471 const struct cfg80211_chan_def *chandef); 472 473 void cfg80211_set_dfs_state(struct wiphy *wiphy, 474 const struct cfg80211_chan_def *chandef, 475 enum nl80211_dfs_state dfs_state); 476 477 void cfg80211_dfs_channels_update_work(struct work_struct *work); 478 479 unsigned int 480 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 481 const struct cfg80211_chan_def *chandef); 482 483 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 484 485 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 486 struct ieee80211_channel *chan); 487 488 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 489 490 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 491 struct ieee80211_channel *chan); 492 493 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 494 { 495 unsigned long end = jiffies; 496 497 if (end >= start) 498 return jiffies_to_msecs(end - start); 499 500 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 501 } 502 503 void 504 cfg80211_get_chan_state(struct wireless_dev *wdev, 505 struct ieee80211_channel **chan, 506 enum cfg80211_chan_mode *chanmode, 507 u8 *radar_detect); 508 509 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 510 struct cfg80211_chan_def *chandef); 511 512 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 513 const u8 *rates, unsigned int n_rates, 514 u32 *mask); 515 516 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 517 enum nl80211_iftype iftype, u32 beacon_int); 518 519 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 520 enum nl80211_iftype iftype, int num); 521 522 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 523 struct wireless_dev *wdev); 524 void cfg80211_leave(struct cfg80211_registered_device *rdev, 525 struct wireless_dev *wdev); 526 527 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 528 struct wireless_dev *wdev); 529 530 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 531 struct wireless_dev *wdev); 532 533 struct cfg80211_internal_bss * 534 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 535 struct cfg80211_internal_bss *tmp, 536 bool signal_valid, unsigned long ts); 537 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 538 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 539 #else 540 /* 541 * Trick to enable using it as a condition, 542 * and also not give a warning when it's 543 * not used that way. 544 */ 545 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 546 #endif 547 548 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 549 550 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 551 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 552 void cfg80211_pmsr_free_wk(struct work_struct *work); 553 554 #endif /* __NET_WIRELESS_CORE_H */ 555