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 24struct 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 /* lock for all wdev lists */ 105 spinlock_t mgmt_registrations_lock; 106 107 /* must be last because of the way we do wiphy_priv(), 108 * and it should at least be aligned to NETDEV_ALIGN */ 109 struct wiphy wiphy __aligned(NETDEV_ALIGN); 110}; 111 112static inline 113struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 114{ 115 BUG_ON(!wiphy); 116 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 117} 118 119static inline void 120cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 121{ 122#ifdef CONFIG_PM 123 int i; 124 125 if (!rdev->wiphy.wowlan_config) 126 return; 127 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 128 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 129 kfree(rdev->wiphy.wowlan_config->patterns); 130 if (rdev->wiphy.wowlan_config->tcp && 131 rdev->wiphy.wowlan_config->tcp->sock) 132 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 133 kfree(rdev->wiphy.wowlan_config->tcp); 134 kfree(rdev->wiphy.wowlan_config->nd_config); 135 kfree(rdev->wiphy.wowlan_config); 136#endif 137} 138 139static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) 140{ 141 u64 r = ++rdev->cookie_counter; 142 143 if (WARN_ON(r == 0)) 144 r = ++rdev->cookie_counter; 145 146 return r; 147} 148 149extern struct workqueue_struct *cfg80211_wq; 150extern struct list_head cfg80211_rdev_list; 151extern int cfg80211_rdev_list_generation; 152 153struct cfg80211_internal_bss { 154 struct list_head list; 155 struct list_head hidden_list; 156 struct rb_node rbn; 157 u64 ts_boottime; 158 unsigned long ts; 159 unsigned long refcount; 160 atomic_t hold; 161 162 /* time at the start of the reception of the first octet of the 163 * timestamp field of the last beacon/probe received for this BSS. 164 * The time is the TSF of the BSS specified by %parent_bssid. 165 */ 166 u64 parent_tsf; 167 168 /* the BSS according to which %parent_tsf is set. This is set to 169 * the BSS that the interface that requested the scan was connected to 170 * when the beacon/probe was received. 171 */ 172 u8 parent_bssid[ETH_ALEN] __aligned(2); 173 174 /* must be last because of priv member */ 175 struct cfg80211_bss pub; 176}; 177 178static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 179{ 180 return container_of(pub, struct cfg80211_internal_bss, pub); 181} 182 183static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 184{ 185 atomic_inc(&bss->hold); 186 if (bss->pub.transmitted_bss) { 187 bss = container_of(bss->pub.transmitted_bss, 188 struct cfg80211_internal_bss, pub); 189 atomic_inc(&bss->hold); 190 } 191} 192 193static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 194{ 195 int r = atomic_dec_return(&bss->hold); 196 WARN_ON(r < 0); 197 if (bss->pub.transmitted_bss) { 198 bss = container_of(bss->pub.transmitted_bss, 199 struct cfg80211_internal_bss, pub); 200 r = atomic_dec_return(&bss->hold); 201 WARN_ON(r < 0); 202 } 203} 204 205 206struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 207int get_wiphy_idx(struct wiphy *wiphy); 208 209struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 210 211int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 212 struct net *net); 213 214void cfg80211_init_wdev(struct wireless_dev *wdev); 215void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, 216 struct wireless_dev *wdev); 217 218static inline void wdev_lock(struct wireless_dev *wdev) 219 __acquires(wdev) 220{ 221 mutex_lock(&wdev->mtx); 222 __acquire(wdev->mtx); 223} 224 225static inline void wdev_unlock(struct wireless_dev *wdev) 226 __releases(wdev) 227{ 228 __release(wdev->mtx); 229 mutex_unlock(&wdev->mtx); 230} 231 232#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 233 234static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 235{ 236 ASSERT_RTNL(); 237 238 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 239 rdev->num_running_ifaces > 0; 240} 241 242enum cfg80211_event_type { 243 EVENT_CONNECT_RESULT, 244 EVENT_ROAMED, 245 EVENT_DISCONNECTED, 246 EVENT_IBSS_JOINED, 247 EVENT_STOPPED, 248 EVENT_PORT_AUTHORIZED, 249}; 250 251struct cfg80211_event { 252 struct list_head list; 253 enum cfg80211_event_type type; 254 255 union { 256 struct cfg80211_connect_resp_params cr; 257 struct cfg80211_roam_info rm; 258 struct { 259 const u8 *ie; 260 size_t ie_len; 261 u16 reason; 262 bool locally_generated; 263 } dc; 264 struct { 265 u8 bssid[ETH_ALEN]; 266 struct ieee80211_channel *channel; 267 } ij; 268 struct { 269 u8 bssid[ETH_ALEN]; 270 } pa; 271 }; 272}; 273 274struct cfg80211_cached_keys { 275 struct key_params params[CFG80211_MAX_WEP_KEYS]; 276 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 277 int def; 278}; 279 280enum cfg80211_chan_mode { 281 CHAN_MODE_UNDEFINED, 282 CHAN_MODE_SHARED, 283 CHAN_MODE_EXCLUSIVE, 284}; 285 286struct cfg80211_beacon_registration { 287 struct list_head list; 288 u32 nlportid; 289}; 290 291struct cfg80211_cqm_config { 292 u32 rssi_hyst; 293 s32 last_rssi_event_value; 294 int n_rssi_thresholds; 295 s32 rssi_thresholds[]; 296}; 297 298void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 299 300/* free object */ 301void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 302 303int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 304 char *newname); 305 306void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 307 308void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 309void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 310 unsigned long age_secs); 311void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, 312 struct ieee80211_channel *channel); 313 314/* IBSS */ 315int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 316 struct net_device *dev, 317 struct cfg80211_ibss_params *params, 318 struct cfg80211_cached_keys *connkeys); 319void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 320int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 321 struct net_device *dev, bool nowext); 322int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 323 struct net_device *dev, bool nowext); 324void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 325 struct ieee80211_channel *channel); 326int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 327 struct wireless_dev *wdev); 328 329/* mesh */ 330extern const struct mesh_config default_mesh_config; 331extern const struct mesh_setup default_mesh_setup; 332int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 333 struct net_device *dev, 334 struct mesh_setup *setup, 335 const struct mesh_config *conf); 336int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 337 struct net_device *dev); 338int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 339 struct net_device *dev); 340int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 341 struct wireless_dev *wdev, 342 struct cfg80211_chan_def *chandef); 343 344/* OCB */ 345int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 346 struct net_device *dev, 347 struct ocb_setup *setup); 348int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 349 struct net_device *dev, 350 struct ocb_setup *setup); 351int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 352 struct net_device *dev); 353int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 354 struct net_device *dev); 355 356/* AP */ 357int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 358 struct net_device *dev, bool notify); 359int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 360 struct net_device *dev, bool notify); 361 362/* MLME */ 363int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 364 struct net_device *dev, 365 struct ieee80211_channel *chan, 366 enum nl80211_auth_type auth_type, 367 const u8 *bssid, 368 const u8 *ssid, int ssid_len, 369 const u8 *ie, int ie_len, 370 const u8 *key, int key_len, int key_idx, 371 const u8 *auth_data, int auth_data_len); 372int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 373 struct net_device *dev, 374 struct ieee80211_channel *chan, 375 const u8 *bssid, 376 const u8 *ssid, int ssid_len, 377 struct cfg80211_assoc_request *req); 378int cfg80211_mlme_deauth(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); 382int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 383 struct net_device *dev, const u8 *bssid, 384 const u8 *ie, int ie_len, u16 reason, 385 bool local_state_change); 386void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 387 struct net_device *dev); 388int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 389 u16 frame_type, const u8 *match_data, 390 int match_len, bool multicast_rx, 391 struct netlink_ext_ack *extack); 392void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); 393void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 394void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 395int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 396 struct wireless_dev *wdev, 397 struct cfg80211_mgmt_tx_params *params, 398 u64 *cookie); 399void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 400 const struct ieee80211_ht_cap *ht_capa_mask); 401void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 402 const struct ieee80211_vht_cap *vht_capa_mask); 403 404/* SME events */ 405int cfg80211_connect(struct cfg80211_registered_device *rdev, 406 struct net_device *dev, 407 struct cfg80211_connect_params *connect, 408 struct cfg80211_cached_keys *connkeys, 409 const u8 *prev_bssid); 410void __cfg80211_connect_result(struct net_device *dev, 411 struct cfg80211_connect_resp_params *params, 412 bool wextev); 413void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 414 size_t ie_len, u16 reason, bool from_ap); 415int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 416 struct net_device *dev, u16 reason, 417 bool wextev); 418void __cfg80211_roamed(struct wireless_dev *wdev, 419 struct cfg80211_roam_info *info); 420void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); 421int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 422 struct wireless_dev *wdev); 423void cfg80211_autodisconnect_wk(struct work_struct *work); 424 425/* SME implementation */ 426void cfg80211_conn_work(struct work_struct *work); 427void cfg80211_sme_scan_done(struct net_device *dev); 428bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 429void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 430void cfg80211_sme_disassoc(struct wireless_dev *wdev); 431void cfg80211_sme_deauth(struct wireless_dev *wdev); 432void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 433void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 434void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 435 436/* internal helpers */ 437bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 438bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, 439 int key_idx, bool pairwise); 440int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 441 struct key_params *params, int key_idx, 442 bool pairwise, const u8 *mac_addr); 443void __cfg80211_scan_done(struct work_struct *wk); 444void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 445 bool send_message); 446void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, 447 struct cfg80211_sched_scan_request *req); 448int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, 449 bool want_multi); 450void cfg80211_sched_scan_results_wk(struct work_struct *work); 451int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, 452 struct cfg80211_sched_scan_request *req, 453 bool driver_initiated); 454int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 455 u64 reqid, bool driver_initiated); 456void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 457int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 458 struct net_device *dev, enum nl80211_iftype ntype, 459 struct vif_params *params); 460void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 461void cfg80211_process_wdev_events(struct wireless_dev *wdev); 462 463bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 464 u32 center_freq_khz, u32 bw_khz); 465 466int cfg80211_scan(struct cfg80211_registered_device *rdev); 467 468extern struct work_struct cfg80211_disconnect_work; 469 470/** 471 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 472 * @wiphy: the wiphy to validate against 473 * @chandef: the channel definition to check 474 * 475 * Checks if chandef is usable and we can/need start CAC on such channel. 476 * 477 * Return: true if all channels available and at least 478 * one channel requires CAC (NL80211_DFS_USABLE) 479 */ 480bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 481 const struct cfg80211_chan_def *chandef); 482 483void cfg80211_set_dfs_state(struct wiphy *wiphy, 484 const struct cfg80211_chan_def *chandef, 485 enum nl80211_dfs_state dfs_state); 486 487void cfg80211_dfs_channels_update_work(struct work_struct *work); 488 489unsigned int 490cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 491 const struct cfg80211_chan_def *chandef); 492 493void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); 494 495bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, 496 struct ieee80211_channel *chan); 497 498bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); 499 500bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, 501 struct ieee80211_channel *chan); 502 503static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 504{ 505 unsigned long end = jiffies; 506 507 if (end >= start) 508 return jiffies_to_msecs(end - start); 509 510 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 511} 512 513void 514cfg80211_get_chan_state(struct wireless_dev *wdev, 515 struct ieee80211_channel **chan, 516 enum cfg80211_chan_mode *chanmode, 517 u8 *radar_detect); 518 519int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 520 struct cfg80211_chan_def *chandef); 521 522int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 523 const u8 *rates, unsigned int n_rates, 524 u32 *mask); 525 526int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 527 enum nl80211_iftype iftype, u32 beacon_int); 528 529void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 530 enum nl80211_iftype iftype, int num); 531 532void __cfg80211_leave(struct cfg80211_registered_device *rdev, 533 struct wireless_dev *wdev); 534void cfg80211_leave(struct cfg80211_registered_device *rdev, 535 struct wireless_dev *wdev); 536 537void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 538 struct wireless_dev *wdev); 539 540void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 541 struct wireless_dev *wdev); 542 543struct cfg80211_internal_bss * 544cfg80211_bss_update(struct cfg80211_registered_device *rdev, 545 struct cfg80211_internal_bss *tmp, 546 bool signal_valid, unsigned long ts); 547#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 548#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 549#else 550/* 551 * Trick to enable using it as a condition, 552 * and also not give a warning when it's 553 * not used that way. 554 */ 555#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 556#endif 557 558void cfg80211_cqm_config_free(struct wireless_dev *wdev); 559 560void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); 561void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); 562void cfg80211_pmsr_free_wk(struct work_struct *work); 563 564#endif /* __NET_WIRELESS_CORE_H */ 565