net/wireless/core.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Wireless configuration interface internals.
   4  *
   5  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   6  */
   7 #ifndef __NET_WIRELESS_CORE_H
   8 #define __NET_WIRELESS_CORE_H
   9 #include <linux/list.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/rbtree.h>
  12 #include <linux/debugfs.h>
  13 #include <linux/rfkill.h>
  14 #include <linux/workqueue.h>
  15 #include <linux/rtnetlink.h>
  16 #include <net/genetlink.h>
  17 #include <net/cfg80211.h>
  18 #include "reg.h"
  19
  20
  21 #define WIPHY_IDX_INVALID       -1
  22
  23 struct cfg80211_registered_device {
  24         const struct cfg80211_ops *ops;
  25         struct list_head list;
  26
  27         /* rfkill support */
  28         struct rfkill_ops rfkill_ops;
  29         struct rfkill *rfkill;
  30         struct work_struct rfkill_sync;
  31
  32         /* ISO / IEC 3166 alpha2 for which this device is receiving
  33          * country IEs on, this can help disregard country IEs from APs
  34          * on the same alpha2 quickly. The alpha2 may differ from
  35          * cfg80211_regdomain's alpha2 when an intersection has occurred.
  36          * If the AP is reconfigured this can also be used to tell us if
  37          * the country on the country IE changed. */
  38         char country_ie_alpha2[2];
  39
  40         /*
  41          * the driver requests the regulatory core to set this regulatory
  42          * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
  43          * devices using the regulatory_set_wiphy_regd() API
  44          */
  45         const struct ieee80211_regdomain *requested_regd;
  46
  47         /* If a Country IE has been received this tells us the environment
  48          * which its telling us its in. This defaults to ENVIRON_ANY */
  49         enum environment_cap env;
  50
  51         /* wiphy index, internal only */
  52         int wiphy_idx;
  53
  54         /* protected by RTNL */
  55         int devlist_generation, wdev_id;
  56         int opencount;
  57         wait_queue_head_t dev_wait;
  58
  59         struct list_head beacon_registrations;
  60         spinlock_t beacon_registrations_lock;
  61
  62         struct list_head mlme_unreg;
  63         spinlock_t mlme_unreg_lock;
  64         struct work_struct mlme_unreg_wk;
  65
  66         /* protected by RTNL only */
  67         int num_running_ifaces;
  68         int num_running_monitor_ifaces;
  69         u64 cookie_counter;
  70
  71         /* BSSes/scanning */
  72         spinlock_t bss_lock;
  73         struct list_head bss_list;
  74         struct rb_root bss_tree;
  75         u32 bss_generation;
  76         u32 bss_entries;
  77         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  78         struct sk_buff *scan_msg;
  79         struct list_head sched_scan_req_list;
  80         time64_t suspend_at;
  81         struct work_struct scan_done_wk;
  82
  83         struct genl_info *cur_cmd_info;
  84
  85         struct work_struct conn_work;
  86         struct work_struct event_work;
  87
  88         struct delayed_work dfs_update_channels_wk;
  89
  90         /* netlink port which started critical protocol (0 means not started) */
  91         u32 crit_proto_nlportid;
  92
  93         struct cfg80211_coalesce *coalesce;
  94
  95         struct work_struct destroy_work;
  96         struct work_struct sched_scan_stop_wk;
  97         struct work_struct sched_scan_res_wk;
  98
  99         struct cfg80211_chan_def radar_chandef;
 100         struct work_struct propagate_radar_detect_wk;
 101
 102         struct cfg80211_chan_def cac_done_chandef;
 103         struct work_struct propagate_cac_done_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 }
 185
 186 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 187 {
 188         int r = atomic_dec_return(&bss->hold);
 189         WARN_ON(r < 0);
 190 }
 191
 192
 193 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 194 int get_wiphy_idx(struct wiphy *wiphy);
 195
 196 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 197
 198 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 199                           struct net *net);
 200
 201 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
 202                         struct wireless_dev *wdev);
 203
 204 static inline void wdev_lock(struct wireless_dev *wdev)
 205         __acquires(wdev)
 206 {
 207         mutex_lock(&wdev->mtx);
 208         __acquire(wdev->mtx);
 209 }
 210
 211 static inline void wdev_unlock(struct wireless_dev *wdev)
 212         __releases(wdev)
 213 {
 214         __release(wdev->mtx);
 215         mutex_unlock(&wdev->mtx);
 216 }
 217
 218 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 219
 220 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 221 {
 222         ASSERT_RTNL();
 223
 224         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 225                rdev->num_running_ifaces > 0;
 226 }
 227
 228 enum cfg80211_event_type {
 229         EVENT_CONNECT_RESULT,
 230         EVENT_ROAMED,
 231         EVENT_DISCONNECTED,
 232         EVENT_IBSS_JOINED,
 233         EVENT_STOPPED,
 234         EVENT_PORT_AUTHORIZED,
 235 };
 236
 237 struct cfg80211_event {
 238         struct list_head list;
 239         enum cfg80211_event_type type;
 240
 241         union {
 242                 struct cfg80211_connect_resp_params cr;
 243                 struct cfg80211_roam_info rm;
 244                 struct {
 245                         const u8 *ie;
 246                         size_t ie_len;
 247                         u16 reason;
 248                         bool locally_generated;
 249                 } dc;
 250                 struct {
 251                         u8 bssid[ETH_ALEN];
 252                         struct ieee80211_channel *channel;
 253                 } ij;
 254                 struct {
 255                         u8 bssid[ETH_ALEN];
 256                 } pa;
 257         };
 258 };
 259
 260 struct cfg80211_cached_keys {
 261         struct key_params params[CFG80211_MAX_WEP_KEYS];
 262         u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
 263         int def;
 264 };
 265
 266 enum cfg80211_chan_mode {
 267         CHAN_MODE_UNDEFINED,
 268         CHAN_MODE_SHARED,
 269         CHAN_MODE_EXCLUSIVE,
 270 };
 271
 272 struct cfg80211_beacon_registration {
 273         struct list_head list;
 274         u32 nlportid;
 275 };
 276
 277 struct cfg80211_cqm_config {
 278         u32 rssi_hyst;
 279         s32 last_rssi_event_value;
 280         int n_rssi_thresholds;
 281         s32 rssi_thresholds[0];
 282 };
 283
 284 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 285
 286 /* free object */
 287 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 288
 289 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 290                         char *newname);
 291
 292 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 293
 294 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 295 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 296                       unsigned long age_secs);
 297
 298 /* IBSS */
 299 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 300                          struct net_device *dev,
 301                          struct cfg80211_ibss_params *params,
 302                          struct cfg80211_cached_keys *connkeys);
 303 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 304 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 305                           struct net_device *dev, bool nowext);
 306 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 307                         struct net_device *dev, bool nowext);
 308 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 309                             struct ieee80211_channel *channel);
 310 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 311                             struct wireless_dev *wdev);
 312
 313 /* mesh */
 314 extern const struct mesh_config default_mesh_config;
 315 extern const struct mesh_setup default_mesh_setup;
 316 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 317                          struct net_device *dev,
 318                          struct mesh_setup *setup,
 319                          const struct mesh_config *conf);
 320 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 321                           struct net_device *dev);
 322 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 323                         struct net_device *dev);
 324 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 325                               struct wireless_dev *wdev,
 326                               struct cfg80211_chan_def *chandef);
 327
 328 /* OCB */
 329 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 330                         struct net_device *dev,
 331                         struct ocb_setup *setup);
 332 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 333                       struct net_device *dev,
 334                       struct ocb_setup *setup);
 335 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 336                          struct net_device *dev);
 337 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 338                        struct net_device *dev);
 339
 340 /* AP */
 341 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 342                        struct net_device *dev, bool notify);
 343 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 344                      struct net_device *dev, bool notify);
 345
 346 /* MLME */
 347 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 348                        struct net_device *dev,
 349                        struct ieee80211_channel *chan,
 350                        enum nl80211_auth_type auth_type,
 351                        const u8 *bssid,
 352                        const u8 *ssid, int ssid_len,
 353                        const u8 *ie, int ie_len,
 354                        const u8 *key, int key_len, int key_idx,
 355                        const u8 *auth_data, int auth_data_len);
 356 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 357                         struct net_device *dev,
 358                         struct ieee80211_channel *chan,
 359                         const u8 *bssid,
 360                         const u8 *ssid, int ssid_len,
 361                         struct cfg80211_assoc_request *req);
 362 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 363                          struct net_device *dev, const u8 *bssid,
 364                          const u8 *ie, int ie_len, u16 reason,
 365                          bool local_state_change);
 366 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 367                            struct net_device *dev, const u8 *bssid,
 368                            const u8 *ie, int ie_len, u16 reason,
 369                            bool local_state_change);
 370 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 371                         struct net_device *dev);
 372 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 373                                 u16 frame_type, const u8 *match_data,
 374                                 int match_len);
 375 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
 376 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 377 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 378 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 379                           struct wireless_dev *wdev,
 380                           struct cfg80211_mgmt_tx_params *params,
 381                           u64 *cookie);
 382 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 383                                const struct ieee80211_ht_cap *ht_capa_mask);
 384 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 385                                 const struct ieee80211_vht_cap *vht_capa_mask);
 386
 387 /* SME events */
 388 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 389                      struct net_device *dev,
 390                      struct cfg80211_connect_params *connect,
 391                      struct cfg80211_cached_keys *connkeys,
 392                      const u8 *prev_bssid);
 393 void __cfg80211_connect_result(struct net_device *dev,
 394                                struct cfg80211_connect_resp_params *params,
 395                                bool wextev);
 396 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 397                              size_t ie_len, u16 reason, bool from_ap);
 398 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 399                         struct net_device *dev, u16 reason,
 400                         bool wextev);
 401 void __cfg80211_roamed(struct wireless_dev *wdev,
 402                        struct cfg80211_roam_info *info);
 403 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid);
 404 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 405                               struct wireless_dev *wdev);
 406 void cfg80211_autodisconnect_wk(struct work_struct *work);
 407
 408 /* SME implementation */
 409 void cfg80211_conn_work(struct work_struct *work);
 410 void cfg80211_sme_scan_done(struct net_device *dev);
 411 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 412 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 413 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 414 void cfg80211_sme_deauth(struct wireless_dev *wdev);
 415 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 416 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 417 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
 418
 419 /* internal helpers */
 420 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 421 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 422                                    struct key_params *params, int key_idx,
 423                                    bool pairwise, const u8 *mac_addr);
 424 void __cfg80211_scan_done(struct work_struct *wk);
 425 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 426                            bool send_message);
 427 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
 428                                  struct cfg80211_sched_scan_request *req);
 429 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
 430                                      bool want_multi);
 431 void cfg80211_sched_scan_results_wk(struct work_struct *work);
 432 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
 433                                  struct cfg80211_sched_scan_request *req,
 434                                  bool driver_initiated);
 435 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 436                                u64 reqid, bool driver_initiated);
 437 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 438 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 439                           struct net_device *dev, enum nl80211_iftype ntype,
 440                           struct vif_params *params);
 441 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 442 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 443
 444 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
 445                                 u32 center_freq_khz, u32 bw_khz);
 446
 447 /**
 448  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 449  * @wiphy: the wiphy to validate against
 450  * @chandef: the channel definition to check
 451  *
 452  * Checks if chandef is usable and we can/need start CAC on such channel.
 453  *
 454  * Return: Return true if all channels available and at least
 455  *         one channel require CAC (NL80211_DFS_USABLE)
 456  */
 457 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 458                                  const struct cfg80211_chan_def *chandef);
 459
 460 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 461                             const struct cfg80211_chan_def *chandef,
 462                             enum nl80211_dfs_state dfs_state);
 463
 464 void cfg80211_dfs_channels_update_work(struct work_struct *work);
 465
 466 unsigned int
 467 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 468                               const struct cfg80211_chan_def *chandef);
 469
 470 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
 471
 472 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
 473                                   struct ieee80211_channel *chan);
 474
 475 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
 476
 477 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
 478                           struct ieee80211_channel *chan);
 479
 480 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 481 {
 482         unsigned long end = jiffies;
 483
 484         if (end >= start)
 485                 return jiffies_to_msecs(end - start);
 486
 487         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 488 }
 489
 490 void
 491 cfg80211_get_chan_state(struct wireless_dev *wdev,
 492                         struct ieee80211_channel **chan,
 493                         enum cfg80211_chan_mode *chanmode,
 494                         u8 *radar_detect);
 495
 496 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 497                                  struct cfg80211_chan_def *chandef);
 498
 499 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 500                            const u8 *rates, unsigned int n_rates,
 501                            u32 *mask);
 502
 503 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 504                                  enum nl80211_iftype iftype, u32 beacon_int);
 505
 506 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 507                                enum nl80211_iftype iftype, int num);
 508
 509 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 510                       struct wireless_dev *wdev);
 511 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 512                     struct wireless_dev *wdev);
 513
 514 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 515                               struct wireless_dev *wdev);
 516
 517 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
 518                        struct wireless_dev *wdev);
 519
 520 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 521 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 522 #else
 523 /*
 524  * Trick to enable using it as a condition,
 525  * and also not give a warning when it's
 526  * not used that way.
 527  */
 528 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 529 #endif
 530
 531 void cfg80211_cqm_config_free(struct wireless_dev *wdev);
 532
 533 #endif /* __NET_WIRELESS_CORE_H */