net/wireless/core.h

   1 /*
   2  * Wireless configuration interface internals.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6 #ifndef __NET_WIRELESS_CORE_H
   7 #define __NET_WIRELESS_CORE_H
   8 #include <linux/list.h>
   9 #include <linux/netdevice.h>
  10 #include <linux/rbtree.h>
  11 #include <linux/debugfs.h>
  12 #include <linux/rfkill.h>
  13 #include <linux/workqueue.h>
  14 #include <linux/rtnetlink.h>
  15 #include <net/genetlink.h>
  16 #include <net/cfg80211.h>
  17 #include "reg.h"
  18
  19
  20 #define WIPHY_IDX_INVALID       -1
  21
  22 struct cfg80211_registered_device {
  23         const struct cfg80211_ops *ops;
  24         struct list_head list;
  25
  26         /* rfkill support */
  27         struct rfkill_ops rfkill_ops;
  28         struct rfkill *rfkill;
  29         struct work_struct rfkill_sync;
  30
  31         /* ISO / IEC 3166 alpha2 for which this device is receiving
  32          * country IEs on, this can help disregard country IEs from APs
  33          * on the same alpha2 quickly. The alpha2 may differ from
  34          * cfg80211_regdomain's alpha2 when an intersection has occurred.
  35          * If the AP is reconfigured this can also be used to tell us if
  36          * the country on the country IE changed. */
  37         char country_ie_alpha2[2];
  38
  39         /*
  40          * the driver requests the regulatory core to set this regulatory
  41          * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
  42          * devices using the regulatory_set_wiphy_regd() API
  43          */
  44         const struct ieee80211_regdomain *requested_regd;
  45
  46         /* If a Country IE has been received this tells us the environment
  47          * which its telling us its in. This defaults to ENVIRON_ANY */
  48         enum environment_cap env;
  49
  50         /* wiphy index, internal only */
  51         int wiphy_idx;
  52
  53         /* protected by RTNL */
  54         int devlist_generation, wdev_id;
  55         int opencount;
  56         wait_queue_head_t dev_wait;
  57
  58         struct list_head beacon_registrations;
  59         spinlock_t beacon_registrations_lock;
  60
  61         struct list_head mlme_unreg;
  62         spinlock_t mlme_unreg_lock;
  63         struct work_struct mlme_unreg_wk;
  64
  65         /* protected by RTNL only */
  66         int num_running_ifaces;
  67         int num_running_monitor_ifaces;
  68
  69         /* BSSes/scanning */
  70         spinlock_t bss_lock;
  71         struct list_head bss_list;
  72         struct rb_root bss_tree;
  73         u32 bss_generation;
  74         u32 bss_entries;
  75         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  76         struct sk_buff *scan_msg;
  77         struct list_head sched_scan_req_list;
  78         unsigned long 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         /* must be last because of the way we do wiphy_priv(),
 104          * and it should at least be aligned to NETDEV_ALIGN */
 105         struct wiphy wiphy __aligned(NETDEV_ALIGN);
 106 };
 107
 108 static inline
 109 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
 110 {
 111         BUG_ON(!wiphy);
 112         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 113 }
 114
 115 static inline void
 116 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 117 {
 118 #ifdef CONFIG_PM
 119         int i;
 120
 121         if (!rdev->wiphy.wowlan_config)
 122                 return;
 123         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
 124                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
 125         kfree(rdev->wiphy.wowlan_config->patterns);
 126         if (rdev->wiphy.wowlan_config->tcp &&
 127             rdev->wiphy.wowlan_config->tcp->sock)
 128                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
 129         kfree(rdev->wiphy.wowlan_config->tcp);
 130         kfree(rdev->wiphy.wowlan_config->nd_config);
 131         kfree(rdev->wiphy.wowlan_config);
 132 #endif
 133 }
 134
 135 extern struct workqueue_struct *cfg80211_wq;
 136 extern struct list_head cfg80211_rdev_list;
 137 extern int cfg80211_rdev_list_generation;
 138
 139 struct cfg80211_internal_bss {
 140         struct list_head list;
 141         struct list_head hidden_list;
 142         struct rb_node rbn;
 143         u64 ts_boottime;
 144         unsigned long ts;
 145         unsigned long refcount;
 146         atomic_t hold;
 147
 148         /* time at the start of the reception of the first octet of the
 149          * timestamp field of the last beacon/probe received for this BSS.
 150          * The time is the TSF of the BSS specified by %parent_bssid.
 151          */
 152         u64 parent_tsf;
 153
 154         /* the BSS according to which %parent_tsf is set. This is set to
 155          * the BSS that the interface that requested the scan was connected to
 156          * when the beacon/probe was received.
 157          */
 158         u8 parent_bssid[ETH_ALEN] __aligned(2);
 159
 160         /* must be last because of priv member */
 161         struct cfg80211_bss pub;
 162 };
 163
 164 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 165 {
 166         return container_of(pub, struct cfg80211_internal_bss, pub);
 167 }
 168
 169 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 170 {
 171         atomic_inc(&bss->hold);
 172 }
 173
 174 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 175 {
 176         int r = atomic_dec_return(&bss->hold);
 177         WARN_ON(r < 0);
 178 }
 179
 180
 181 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 182 int get_wiphy_idx(struct wiphy *wiphy);
 183
 184 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 185
 186 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 187                           struct net *net);
 188
 189 static inline void wdev_lock(struct wireless_dev *wdev)
 190         __acquires(wdev)
 191 {
 192         mutex_lock(&wdev->mtx);
 193         __acquire(wdev->mtx);
 194 }
 195
 196 static inline void wdev_unlock(struct wireless_dev *wdev)
 197         __releases(wdev)
 198 {
 199         __release(wdev->mtx);
 200         mutex_unlock(&wdev->mtx);
 201 }
 202
 203 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 204
 205 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 206 {
 207         ASSERT_RTNL();
 208
 209         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 210                rdev->num_running_ifaces > 0;
 211 }
 212
 213 enum cfg80211_event_type {
 214         EVENT_CONNECT_RESULT,
 215         EVENT_ROAMED,
 216         EVENT_DISCONNECTED,
 217         EVENT_IBSS_JOINED,
 218         EVENT_STOPPED,
 219 };
 220
 221 struct cfg80211_event {
 222         struct list_head list;
 223         enum cfg80211_event_type type;
 224
 225         union {
 226                 struct cfg80211_connect_resp_params cr;
 227                 struct cfg80211_roam_info rm;
 228                 struct {
 229                         const u8 *ie;
 230                         size_t ie_len;
 231                         u16 reason;
 232                         bool locally_generated;
 233                 } dc;
 234                 struct {
 235                         u8 bssid[ETH_ALEN];
 236                         struct ieee80211_channel *channel;
 237                 } ij;
 238         };
 239 };
 240
 241 struct cfg80211_cached_keys {
 242         struct key_params params[CFG80211_MAX_WEP_KEYS];
 243         u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
 244         int def;
 245 };
 246
 247 enum cfg80211_chan_mode {
 248         CHAN_MODE_UNDEFINED,
 249         CHAN_MODE_SHARED,
 250         CHAN_MODE_EXCLUSIVE,
 251 };
 252
 253 struct cfg80211_beacon_registration {
 254         struct list_head list;
 255         u32 nlportid;
 256 };
 257
 258 struct cfg80211_cqm_config {
 259         u32 rssi_hyst;
 260         s32 last_rssi_event_value;
 261         int n_rssi_thresholds;
 262         s32 rssi_thresholds[0];
 263 };
 264
 265 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 266
 267 /* free object */
 268 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 269
 270 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 271                         char *newname);
 272
 273 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 274
 275 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 276 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 277                       unsigned long age_secs);
 278
 279 /* IBSS */
 280 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 281                        struct net_device *dev,
 282                        struct cfg80211_ibss_params *params,
 283                        struct cfg80211_cached_keys *connkeys);
 284 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 285 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 286                           struct net_device *dev, bool nowext);
 287 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 288                         struct net_device *dev, bool nowext);
 289 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 290                             struct ieee80211_channel *channel);
 291 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 292                             struct wireless_dev *wdev);
 293
 294 /* mesh */
 295 extern const struct mesh_config default_mesh_config;
 296 extern const struct mesh_setup default_mesh_setup;
 297 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 298                          struct net_device *dev,
 299                          struct mesh_setup *setup,
 300                          const struct mesh_config *conf);
 301 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 302                        struct net_device *dev,
 303                        struct mesh_setup *setup,
 304                        const struct mesh_config *conf);
 305 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 306                           struct net_device *dev);
 307 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 308                         struct net_device *dev);
 309 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 310                               struct wireless_dev *wdev,
 311                               struct cfg80211_chan_def *chandef);
 312
 313 /* OCB */
 314 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 315                         struct net_device *dev,
 316                         struct ocb_setup *setup);
 317 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 318                       struct net_device *dev,
 319                       struct ocb_setup *setup);
 320 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 321                          struct net_device *dev);
 322 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 323                        struct net_device *dev);
 324
 325 /* AP */
 326 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 327                        struct net_device *dev, bool notify);
 328 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 329                      struct net_device *dev, bool notify);
 330
 331 /* MLME */
 332 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 333                        struct net_device *dev,
 334                        struct ieee80211_channel *chan,
 335                        enum nl80211_auth_type auth_type,
 336                        const u8 *bssid,
 337                        const u8 *ssid, int ssid_len,
 338                        const u8 *ie, int ie_len,
 339                        const u8 *key, int key_len, int key_idx,
 340                        const u8 *auth_data, int auth_data_len);
 341 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 342                         struct net_device *dev,
 343                         struct ieee80211_channel *chan,
 344                         const u8 *bssid,
 345                         const u8 *ssid, int ssid_len,
 346                         struct cfg80211_assoc_request *req);
 347 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 348                          struct net_device *dev, const u8 *bssid,
 349                          const u8 *ie, int ie_len, u16 reason,
 350                          bool local_state_change);
 351 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 352                            struct net_device *dev, const u8 *bssid,
 353                            const u8 *ie, int ie_len, u16 reason,
 354                            bool local_state_change);
 355 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 356                         struct net_device *dev);
 357 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 358                                 u16 frame_type, const u8 *match_data,
 359                                 int match_len);
 360 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
 361 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 362 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 363 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 364                           struct wireless_dev *wdev,
 365                           struct cfg80211_mgmt_tx_params *params,
 366                           u64 *cookie);
 367 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 368                                const struct ieee80211_ht_cap *ht_capa_mask);
 369 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 370                                 const struct ieee80211_vht_cap *vht_capa_mask);
 371
 372 /* SME events */
 373 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 374                      struct net_device *dev,
 375                      struct cfg80211_connect_params *connect,
 376                      struct cfg80211_cached_keys *connkeys,
 377                      const u8 *prev_bssid);
 378 void __cfg80211_connect_result(struct net_device *dev,
 379                                struct cfg80211_connect_resp_params *params,
 380                                bool wextev);
 381 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 382                              size_t ie_len, u16 reason, bool from_ap);
 383 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 384                         struct net_device *dev, u16 reason,
 385                         bool wextev);
 386 void __cfg80211_roamed(struct wireless_dev *wdev,
 387                        struct cfg80211_roam_info *info);
 388 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 389                               struct wireless_dev *wdev);
 390 void cfg80211_autodisconnect_wk(struct work_struct *work);
 391
 392 /* SME implementation */
 393 void cfg80211_conn_work(struct work_struct *work);
 394 void cfg80211_sme_scan_done(struct net_device *dev);
 395 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 396 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 397 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 398 void cfg80211_sme_deauth(struct wireless_dev *wdev);
 399 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 400 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 401 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
 402
 403 /* internal helpers */
 404 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 405 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 406                                    struct key_params *params, int key_idx,
 407                                    bool pairwise, const u8 *mac_addr);
 408 void __cfg80211_scan_done(struct work_struct *wk);
 409 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 410                            bool send_message);
 411 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
 412                                  struct cfg80211_sched_scan_request *req);
 413 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
 414                                      bool want_multi);
 415 void cfg80211_sched_scan_results_wk(struct work_struct *work);
 416 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
 417                                  struct cfg80211_sched_scan_request *req,
 418                                  bool driver_initiated);
 419 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 420                                u64 reqid, bool driver_initiated);
 421 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 422 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 423                           struct net_device *dev, enum nl80211_iftype ntype,
 424                           struct vif_params *params);
 425 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 426 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 427
 428 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
 429                                 u32 center_freq_khz, u32 bw_khz);
 430
 431 /**
 432  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 433  * @wiphy: the wiphy to validate against
 434  * @chandef: the channel definition to check
 435  *
 436  * Checks if chandef is usable and we can/need start CAC on such channel.
 437  *
 438  * Return: Return true if all channels available and at least
 439  *         one channel require CAC (NL80211_DFS_USABLE)
 440  */
 441 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 442                                  const struct cfg80211_chan_def *chandef);
 443
 444 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 445                             const struct cfg80211_chan_def *chandef,
 446                             enum nl80211_dfs_state dfs_state);
 447
 448 void cfg80211_dfs_channels_update_work(struct work_struct *work);
 449
 450 unsigned int
 451 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 452                               const struct cfg80211_chan_def *chandef);
 453
 454 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
 455
 456 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
 457                                   struct ieee80211_channel *chan);
 458
 459 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
 460
 461 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
 462                           struct ieee80211_channel *chan);
 463
 464 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 465 {
 466         unsigned long end = jiffies;
 467
 468         if (end >= start)
 469                 return jiffies_to_msecs(end - start);
 470
 471         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 472 }
 473
 474 void
 475 cfg80211_get_chan_state(struct wireless_dev *wdev,
 476                         struct ieee80211_channel **chan,
 477                         enum cfg80211_chan_mode *chanmode,
 478                         u8 *radar_detect);
 479
 480 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 481                                  struct cfg80211_chan_def *chandef);
 482
 483 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 484                            const u8 *rates, unsigned int n_rates,
 485                            u32 *mask);
 486
 487 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 488                                  enum nl80211_iftype iftype, u32 beacon_int);
 489
 490 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 491                                enum nl80211_iftype iftype, int num);
 492
 493 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 494                       struct wireless_dev *wdev);
 495 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 496                     struct wireless_dev *wdev);
 497
 498 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 499                               struct wireless_dev *wdev);
 500
 501 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
 502                        struct wireless_dev *wdev);
 503
 504 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
 505
 506 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 507 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 508 #else
 509 /*
 510  * Trick to enable using it as a condition,
 511  * and also not give a warning when it's
 512  * not used that way.
 513  */
 514 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 515 #endif
 516
 517 void cfg80211_cqm_config_free(struct wireless_dev *wdev);
 518
 519 #endif /* __NET_WIRELESS_CORE_H */