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 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 cfg80211_registered_device *rdev, 212 struct wireless_dev *wdev); 213 214 static inline void wdev_lock(struct wireless_dev *wdev) 215 __acquires(wdev) 216 { 217 mutex_lock(&wdev->mtx); 218 __acquire(wdev->mtx); 219 } 220 221 static inline void wdev_unlock(struct wireless_dev *wdev) 222 __releases(wdev) 223 { 224 __release(wdev->mtx); 225 mutex_unlock(&wdev->mtx); 226 } 227 228 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 229 230 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 231 { 232 ASSERT_RTNL(); 233 234 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 235 rdev->num_running_ifaces > 0; 236 } 237 238 enum cfg80211_event_type { 239 EVENT_CONNECT_RESULT, 240 EVENT_ROAMED, 241 EVENT_DISCONNECTED, 242 EVENT_IBSS_JOINED, 243 EVENT_STOPPED, 244 EVENT_PORT_AUTHORIZED, 245 }; 246 247 struct cfg80211_event { 248 struct list_head list; 249 enum cfg80211_event_type type; 250 251 union { 252 struct cfg80211_connect_resp_params cr; 253 struct cfg80211_roam_info rm; 254 struct { 255 const u8 *ie; 256 size_t ie_len; 257 u16 reason; 258 bool locally_generated; 259 } dc; 260 struct { 261 u8 bssid[ETH_ALEN]; 262 struct ieee80211_channel *channel; 263 } ij; 264 struct { 265 u8 bssid[ETH_ALEN]; 266 } pa; 267 }; 268 }; 269 270 struct cfg80211_cached_keys { 271 struct key_params params[CFG80211_MAX_WEP_KEYS]; 272 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 273 int def; 274 }; 275 276 enum cfg80211_chan_mode { 277 CHAN_MODE_UNDEFINED, 278 CHAN_MODE_SHARED, 279 CHAN_MODE_EXCLUSIVE, 280 }; 281 282 struct cfg80211_beacon_registration { 283 struct list_head list; 284 u32 nlportid; 285 }; 286 287 struct cfg80211_cqm_config { 288 u32 rssi_hyst; 289 s32 last_rssi_event_value; 290 int n_rssi_thresholds; 291 s32 rssi_thresholds[]; 292 }; 293 294 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 295 296 /* free object */ 297 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 298 299 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 300 char *newname); 301 302 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 303 304 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 305 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 306 unsigned long age_secs); 307 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 308 struct ieee80211_channel *channel); 309 310 /* IBSS */ 311 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 312 struct net_device *dev, 313 struct cfg80211_ibss_params *params, 314 struct cfg80211_cached_keys *connkeys); 315 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 316 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 317 struct net_device *dev, bool nowext); 318 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 319 struct net_device *dev, bool nowext); 320 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 321 struct ieee80211_channel *channel); 322 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 323 struct wireless_dev *wdev); 324 325 /* mesh */ 326 extern const struct mesh_config default_mesh_config; 327 extern const struct mesh_setup default_mesh_setup; 328 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 329 struct net_device *dev, 330 struct mesh_setup *setup, 331 const struct mesh_config *conf); 332 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 333 struct net_device *dev); 334 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 335 struct net_device *dev); 336 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 337 struct wireless_dev *wdev, 338 struct cfg80211_chan_def *chandef); 339 340 /* OCB */ 341 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 342 struct net_device *dev, 343 struct ocb_setup *setup); 344 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 345 struct net_device *dev, 346 struct ocb_setup *setup); 347 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 348 struct net_device *dev); 349 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 350 struct net_device *dev); 351 352 /* AP */ 353 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 354 struct net_device *dev, bool notify); 355 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 356 struct net_device *dev, bool notify); 357 358 /* MLME */ 359 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 360 struct net_device *dev, 361 struct ieee80211_channel *chan, 362 enum nl80211_auth_type auth_type, 363 const u8 *bssid, 364 const u8 *ssid, int ssid_len, 365 const u8 *ie, int ie_len, 366 const u8 *key, int key_len, int key_idx, 367 const u8 *auth_data, int auth_data_len); 368 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 369 struct net_device *dev, 370 struct ieee80211_channel *chan, 371 const u8 *bssid, 372 const u8 *ssid, int ssid_len, 373 struct cfg80211_assoc_request *req); 374 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 375 struct net_device *dev, const u8 *bssid, 376 const u8 *ie, int ie_len, u16 reason, 377 bool local_state_change); 378 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 379 struct net_device *dev, const u8 *bssid, 380 const u8 *ie, int ie_len, u16 reason, 381 bool local_state_change); 382 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 383 struct net_device *dev); 384 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 385 u16 frame_type, const u8 *match_data, 386 int match_len, bool multicast_rx, 387 struct netlink_ext_ack *extack); 388 void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 389 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 390 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 391 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 392 struct wireless_dev *wdev, 393 struct cfg80211_mgmt_tx_params *params, 394 u64 *cookie); 395 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 396 const struct ieee80211_ht_cap *ht_capa_mask); 397 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 398 const struct ieee80211_vht_cap *vht_capa_mask); 399 400 /* SME events */ 401 int cfg80211_connect(struct cfg80211_registered_device *rdev, 402 struct net_device *dev, 403 struct cfg80211_connect_params *connect, 404 struct cfg80211_cached_keys *connkeys, 405 const u8 *prev_bssid); 406 void __cfg80211_connect_result(struct net_device *dev, 407 struct cfg80211_connect_resp_params *params, 408 bool wextev); 409 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 410 size_t ie_len, u16 reason, bool from_ap); 411 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 412 struct net_device *dev, u16 reason, 413 bool wextev); 414 void __cfg80211_roamed(struct wireless_dev *wdev, 415 struct cfg80211_roam_info *info); 416 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 417 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 418 struct wireless_dev *wdev); 419 void cfg80211_autodisconnect_wk(struct work_struct *work); 420 421 /* SME implementation */ 422 void cfg80211_conn_work(struct work_struct *work); 423 void cfg80211_sme_scan_done(struct net_device *dev); 424 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 425 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 426 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 427 void cfg80211_sme_deauth(struct wireless_dev *wdev); 428 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 429 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 430 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 431 432 /* internal helpers */ 433 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 434 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 435 struct key_params *params, int key_idx, 436 bool pairwise, const u8 *mac_addr); 437 void __cfg80211_scan_done(struct work_struct *wk); 438 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 439 bool send_message); 440 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 441 struct cfg80211_sched_scan_request *req); 442 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 443 bool want_multi); 444 void cfg80211_sched_scan_results_wk(struct work_struct *work); 445 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 446 struct cfg80211_sched_scan_request *req, 447 bool driver_initiated); 448 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 449 u64 reqid, bool driver_initiated); 450 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 451 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 452 struct net_device *dev, enum nl80211_iftype ntype, 453 struct vif_params *params); 454 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 455 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 456 457 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 458 u32 center_freq_khz, u32 bw_khz); 459 460 extern struct work_struct cfg80211_disconnect_work; 461 462 /** 463 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 464 * @wiphy: the wiphy to validate against 465 * @chandef: the channel definition to check 466 * 467 * Checks if chandef is usable and we can/need start CAC on such channel. 468 * 469 * Return: Return true if all channels available and at least 470 * one channel require CAC (NL80211_DFS_USABLE) 471 */ 472 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 473 const struct cfg80211_chan_def *chandef); 474 475 void cfg80211_set_dfs_state(struct wiphy *wiphy, 476 const struct cfg80211_chan_def *chandef, 477 enum nl80211_dfs_state dfs_state); 478 479 void cfg80211_dfs_channels_update_work(struct work_struct *work); 480 481 unsigned int 482 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 483 const struct cfg80211_chan_def *chandef); 484 485 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 486 487 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 488 struct ieee80211_channel *chan); 489 490 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 491 492 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 493 struct ieee80211_channel *chan); 494 495 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 496 { 497 unsigned long end = jiffies; 498 499 if (end >= start) 500 return jiffies_to_msecs(end - start); 501 502 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 503 } 504 505 void 506 cfg80211_get_chan_state(struct wireless_dev *wdev, 507 struct ieee80211_channel **chan, 508 enum cfg80211_chan_mode *chanmode, 509 u8 *radar_detect); 510 511 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 512 struct cfg80211_chan_def *chandef); 513 514 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 515 const u8 *rates, unsigned int n_rates, 516 u32 *mask); 517 518 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 519 enum nl80211_iftype iftype, u32 beacon_int); 520 521 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 522 enum nl80211_iftype iftype, int num); 523 524 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 525 struct wireless_dev *wdev); 526 void cfg80211_leave(struct cfg80211_registered_device *rdev, 527 struct wireless_dev *wdev); 528 529 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 530 struct wireless_dev *wdev); 531 532 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 533 struct wireless_dev *wdev); 534 535 struct cfg80211_internal_bss * 536 cfg80211_bss_update(struct cfg80211_registered_device *rdev, 537 struct cfg80211_internal_bss *tmp, 538 bool signal_valid, unsigned long ts); 539 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 540 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 541 #else 542 /* 543 * Trick to enable using it as a condition, 544 * and also not give a warning when it's 545 * not used that way. 546 */ 547 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 548 #endif 549 550 void cfg80211_cqm_config_free(struct wireless_dev *wdev); 551 552 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 553 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 554 void cfg80211_pmsr_free_wk(struct work_struct *work); 555 556 #endif /* __NET_WIRELESS_CORE_H */ 557