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  * 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_sync;
  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         struct list_head mlme_unreg;
  64         spinlock_t mlme_unreg_lock;
  65         struct work_struct mlme_unreg_wk;
  66
  67         /* protected by RTNL only */
  68         int num_running_ifaces;
  69         int num_running_monitor_ifaces;
  70         u64 cookie_counter;
  71
  72         /* BSSes/scanning */
  73         spinlock_t bss_lock;
  74         struct list_head bss_list;
  75         struct rb_root bss_tree;
  76         u32 bss_generation;
  77         u32 bss_entries;
  78         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  79         struct sk_buff *scan_msg;
  80         struct list_head sched_scan_req_list;
  81         time64_t suspend_at;
  82         struct work_struct scan_done_wk;
  83
  84         struct genl_info *cur_cmd_info;
  85
  86         struct work_struct conn_work;
  87         struct work_struct event_work;
  88
  89         struct delayed_work dfs_update_channels_wk;
  90
  91         /* netlink port which started critical protocol (0 means not started) */
  92         u32 crit_proto_nlportid;
  93
  94         struct cfg80211_coalesce *coalesce;
  95
  96         struct work_struct destroy_work;
  97         struct work_struct sched_scan_stop_wk;
  98         struct work_struct sched_scan_res_wk;
  99
 100         struct cfg80211_chan_def radar_chandef;
 101         struct work_struct propagate_radar_detect_wk;
 102
 103         struct cfg80211_chan_def cac_done_chandef;
 104         struct work_struct propagate_cac_done_wk;
 105
 106         /* must be last because of the way we do wiphy_priv(),
 107          * and it should at least be aligned to NETDEV_ALIGN */
 108         struct wiphy wiphy __aligned(NETDEV_ALIGN);
 109 };
 110
 111 static inline
 112 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
 113 {
 114         BUG_ON(!wiphy);
 115         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 116 }
 117
 118 static inline void
 119 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 120 {
 121 #ifdef CONFIG_PM
 122         int i;
 123
 124         if (!rdev->wiphy.wowlan_config)
 125                 return;
 126         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
 127                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
 128         kfree(rdev->wiphy.wowlan_config->patterns);
 129         if (rdev->wiphy.wowlan_config->tcp &&
 130             rdev->wiphy.wowlan_config->tcp->sock)
 131                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
 132         kfree(rdev->wiphy.wowlan_config->tcp);
 133         kfree(rdev->wiphy.wowlan_config->nd_config);
 134         kfree(rdev->wiphy.wowlan_config);
 135 #endif
 136 }
 137
 138 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev)
 139 {
 140         u64 r = ++rdev->cookie_counter;
 141
 142         if (WARN_ON(r == 0))
 143                 r = ++rdev->cookie_counter;
 144
 145         return r;
 146 }
 147
 148 extern struct workqueue_struct *cfg80211_wq;
 149 extern struct list_head cfg80211_rdev_list;
 150 extern int cfg80211_rdev_list_generation;
 151
 152 struct cfg80211_internal_bss {
 153         struct list_head list;
 154         struct list_head hidden_list;
 155         struct list_head nontrans_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
 178 static 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
 183 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 184 {
 185         atomic_inc(&bss->hold);
 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 }
 193
 194
 195 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 196 int get_wiphy_idx(struct wiphy *wiphy);
 197
 198 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 199
 200 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 201                           struct net *net);
 202
 203 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
 204                         struct wireless_dev *wdev);
 205
 206 static inline void wdev_lock(struct wireless_dev *wdev)
 207         __acquires(wdev)
 208 {
 209         mutex_lock(&wdev->mtx);
 210         __acquire(wdev->mtx);
 211 }
 212
 213 static inline void wdev_unlock(struct wireless_dev *wdev)
 214         __releases(wdev)
 215 {
 216         __release(wdev->mtx);
 217         mutex_unlock(&wdev->mtx);
 218 }
 219
 220 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 221
 222 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 223 {
 224         ASSERT_RTNL();
 225
 226         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 227                rdev->num_running_ifaces > 0;
 228 }
 229
 230 enum cfg80211_event_type {
 231         EVENT_CONNECT_RESULT,
 232         EVENT_ROAMED,
 233         EVENT_DISCONNECTED,
 234         EVENT_IBSS_JOINED,
 235         EVENT_STOPPED,
 236         EVENT_PORT_AUTHORIZED,
 237 };
 238
 239 struct cfg80211_event {
 240         struct list_head list;
 241         enum cfg80211_event_type type;
 242
 243         union {
 244                 struct cfg80211_connect_resp_params cr;
 245                 struct cfg80211_roam_info rm;
 246                 struct {
 247                         const u8 *ie;
 248                         size_t ie_len;
 249                         u16 reason;
 250                         bool locally_generated;
 251                 } dc;
 252                 struct {
 253                         u8 bssid[ETH_ALEN];
 254                         struct ieee80211_channel *channel;
 255                 } ij;
 256                 struct {
 257                         u8 bssid[ETH_ALEN];
 258                 } pa;
 259         };
 260 };
 261
 262 struct cfg80211_cached_keys {
 263         struct key_params params[CFG80211_MAX_WEP_KEYS];
 264         u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
 265         int def;
 266 };
 267
 268 enum cfg80211_chan_mode {
 269         CHAN_MODE_UNDEFINED,
 270         CHAN_MODE_SHARED,
 271         CHAN_MODE_EXCLUSIVE,
 272 };
 273
 274 struct cfg80211_beacon_registration {
 275         struct list_head list;
 276         u32 nlportid;
 277 };
 278
 279 struct cfg80211_cqm_config {
 280         u32 rssi_hyst;
 281         s32 last_rssi_event_value;
 282         int n_rssi_thresholds;
 283         s32 rssi_thresholds[0];
 284 };
 285
 286 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 287
 288 /* free object */
 289 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 290
 291 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 292                         char *newname);
 293
 294 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 295
 296 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 297 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 298                       unsigned long age_secs);
 299
 300 /* IBSS */
 301 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 302                          struct net_device *dev,
 303                          struct cfg80211_ibss_params *params,
 304                          struct cfg80211_cached_keys *connkeys);
 305 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 306 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 307                           struct net_device *dev, bool nowext);
 308 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 309                         struct net_device *dev, bool nowext);
 310 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 311                             struct ieee80211_channel *channel);
 312 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 313                             struct wireless_dev *wdev);
 314
 315 /* mesh */
 316 extern const struct mesh_config default_mesh_config;
 317 extern const struct mesh_setup default_mesh_setup;
 318 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 319                          struct net_device *dev,
 320                          struct mesh_setup *setup,
 321                          const struct mesh_config *conf);
 322 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 323                           struct net_device *dev);
 324 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 325                         struct net_device *dev);
 326 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 327                               struct wireless_dev *wdev,
 328                               struct cfg80211_chan_def *chandef);
 329
 330 /* OCB */
 331 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 332                         struct net_device *dev,
 333                         struct ocb_setup *setup);
 334 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 335                       struct net_device *dev,
 336                       struct ocb_setup *setup);
 337 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 338                          struct net_device *dev);
 339 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 340                        struct net_device *dev);
 341
 342 /* AP */
 343 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 344                        struct net_device *dev, bool notify);
 345 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 346                      struct net_device *dev, bool notify);
 347
 348 /* MLME */
 349 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 350                        struct net_device *dev,
 351                        struct ieee80211_channel *chan,
 352                        enum nl80211_auth_type auth_type,
 353                        const u8 *bssid,
 354                        const u8 *ssid, int ssid_len,
 355                        const u8 *ie, int ie_len,
 356                        const u8 *key, int key_len, int key_idx,
 357                        const u8 *auth_data, int auth_data_len);
 358 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 359                         struct net_device *dev,
 360                         struct ieee80211_channel *chan,
 361                         const u8 *bssid,
 362                         const u8 *ssid, int ssid_len,
 363                         struct cfg80211_assoc_request *req);
 364 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 365                          struct net_device *dev, const u8 *bssid,
 366                          const u8 *ie, int ie_len, u16 reason,
 367                          bool local_state_change);
 368 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 369                            struct net_device *dev, const u8 *bssid,
 370                            const u8 *ie, int ie_len, u16 reason,
 371                            bool local_state_change);
 372 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 373                         struct net_device *dev);
 374 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 375                                 u16 frame_type, const u8 *match_data,
 376                                 int match_len);
 377 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
 378 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 379 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 380 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 381                           struct wireless_dev *wdev,
 382                           struct cfg80211_mgmt_tx_params *params,
 383                           u64 *cookie);
 384 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 385                                const struct ieee80211_ht_cap *ht_capa_mask);
 386 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 387                                 const struct ieee80211_vht_cap *vht_capa_mask);
 388
 389 /* SME events */
 390 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 391                      struct net_device *dev,
 392                      struct cfg80211_connect_params *connect,
 393                      struct cfg80211_cached_keys *connkeys,
 394                      const u8 *prev_bssid);
 395 void __cfg80211_connect_result(struct net_device *dev,
 396                                struct cfg80211_connect_resp_params *params,
 397                                bool wextev);
 398 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 399                              size_t ie_len, u16 reason, bool from_ap);
 400 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 401                         struct net_device *dev, u16 reason,
 402                         bool wextev);
 403 void __cfg80211_roamed(struct wireless_dev *wdev,
 404                        struct cfg80211_roam_info *info);
 405 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid);
 406 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 407                               struct wireless_dev *wdev);
 408 void cfg80211_autodisconnect_wk(struct work_struct *work);
 409
 410 /* SME implementation */
 411 void cfg80211_conn_work(struct work_struct *work);
 412 void cfg80211_sme_scan_done(struct net_device *dev);
 413 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 414 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 415 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 416 void cfg80211_sme_deauth(struct wireless_dev *wdev);
 417 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 418 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 419 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
 420
 421 /* internal helpers */
 422 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 423 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 424                                    struct key_params *params, int key_idx,
 425                                    bool pairwise, const u8 *mac_addr);
 426 void __cfg80211_scan_done(struct work_struct *wk);
 427 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 428                            bool send_message);
 429 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
 430                                  struct cfg80211_sched_scan_request *req);
 431 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
 432                                      bool want_multi);
 433 void cfg80211_sched_scan_results_wk(struct work_struct *work);
 434 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
 435                                  struct cfg80211_sched_scan_request *req,
 436                                  bool driver_initiated);
 437 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 438                                u64 reqid, bool driver_initiated);
 439 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 440 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 441                           struct net_device *dev, enum nl80211_iftype ntype,
 442                           struct vif_params *params);
 443 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 444 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 445
 446 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
 447                                 u32 center_freq_khz, u32 bw_khz);
 448
 449 /**
 450  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 451  * @wiphy: the wiphy to validate against
 452  * @chandef: the channel definition to check
 453  *
 454  * Checks if chandef is usable and we can/need start CAC on such channel.
 455  *
 456  * Return: Return true if all channels available and at least
 457  *         one channel require CAC (NL80211_DFS_USABLE)
 458  */
 459 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 460                                  const struct cfg80211_chan_def *chandef);
 461
 462 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 463                             const struct cfg80211_chan_def *chandef,
 464                             enum nl80211_dfs_state dfs_state);
 465
 466 void cfg80211_dfs_channels_update_work(struct work_struct *work);
 467
 468 unsigned int
 469 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 470                               const struct cfg80211_chan_def *chandef);
 471
 472 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
 473
 474 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
 475                                   struct ieee80211_channel *chan);
 476
 477 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
 478
 479 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
 480                           struct ieee80211_channel *chan);
 481
 482 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 483 {
 484         unsigned long end = jiffies;
 485
 486         if (end >= start)
 487                 return jiffies_to_msecs(end - start);
 488
 489         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 490 }
 491
 492 void
 493 cfg80211_get_chan_state(struct wireless_dev *wdev,
 494                         struct ieee80211_channel **chan,
 495                         enum cfg80211_chan_mode *chanmode,
 496                         u8 *radar_detect);
 497
 498 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 499                                  struct cfg80211_chan_def *chandef);
 500
 501 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 502                            const u8 *rates, unsigned int n_rates,
 503                            u32 *mask);
 504
 505 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 506                                  enum nl80211_iftype iftype, u32 beacon_int);
 507
 508 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 509                                enum nl80211_iftype iftype, int num);
 510
 511 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 512                       struct wireless_dev *wdev);
 513 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 514                     struct wireless_dev *wdev);
 515
 516 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 517                               struct wireless_dev *wdev);
 518
 519 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
 520                        struct wireless_dev *wdev);
 521
 522 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 523 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 524 #else
 525 /*
 526  * Trick to enable using it as a condition,
 527  * and also not give a warning when it's
 528  * not used that way.
 529  */
 530 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 531 #endif
 532
 533 void cfg80211_cqm_config_free(struct wireless_dev *wdev);
 534
 535 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid);
 536 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev);
 537 void cfg80211_pmsr_free_wk(struct work_struct *work);
 538
 539 #endif /* __NET_WIRELESS_CORE_H */