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         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  75         struct sk_buff *scan_msg;
  76         struct cfg80211_sched_scan_request __rcu *sched_scan_req;
  77         unsigned long suspend_at;
  78         struct work_struct scan_done_wk;
  79         struct work_struct sched_scan_results_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         spinlock_t destroy_list_lock;
  94         struct list_head destroy_list;
  95         struct work_struct destroy_work;
  96
  97         struct work_struct sched_scan_stop_wk;
  98
  99         /* must be last because of the way we do wiphy_priv(),
 100          * and it should at least be aligned to NETDEV_ALIGN */
 101         struct wiphy wiphy __aligned(NETDEV_ALIGN);
 102 };
 103
 104 static inline
 105 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
 106 {
 107         BUG_ON(!wiphy);
 108         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 109 }
 110
 111 static inline void
 112 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 113 {
 114 #ifdef CONFIG_PM
 115         int i;
 116
 117         if (!rdev->wiphy.wowlan_config)
 118                 return;
 119         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
 120                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
 121         kfree(rdev->wiphy.wowlan_config->patterns);
 122         if (rdev->wiphy.wowlan_config->tcp &&
 123             rdev->wiphy.wowlan_config->tcp->sock)
 124                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
 125         kfree(rdev->wiphy.wowlan_config->tcp);
 126         kfree(rdev->wiphy.wowlan_config->nd_config);
 127         kfree(rdev->wiphy.wowlan_config);
 128 #endif
 129 }
 130
 131 extern struct workqueue_struct *cfg80211_wq;
 132 extern struct list_head cfg80211_rdev_list;
 133 extern int cfg80211_rdev_list_generation;
 134
 135 struct cfg80211_internal_bss {
 136         struct list_head list;
 137         struct list_head hidden_list;
 138         struct rb_node rbn;
 139         u64 ts_boottime;
 140         unsigned long ts;
 141         unsigned long refcount;
 142         atomic_t hold;
 143
 144         /* time at the start of the reception of the first octet of the
 145          * timestamp field of the last beacon/probe received for this BSS.
 146          * The time is the TSF of the BSS specified by %parent_bssid.
 147          */
 148         u64 parent_tsf;
 149
 150         /* the BSS according to which %parent_tsf is set. This is set to
 151          * the BSS that the interface that requested the scan was connected to
 152          * when the beacon/probe was received.
 153          */
 154         u8 parent_bssid[ETH_ALEN] __aligned(2);
 155
 156         /* must be last because of priv member */
 157         struct cfg80211_bss pub;
 158 };
 159
 160 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 161 {
 162         return container_of(pub, struct cfg80211_internal_bss, pub);
 163 }
 164
 165 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 166 {
 167         atomic_inc(&bss->hold);
 168 }
 169
 170 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 171 {
 172         int r = atomic_dec_return(&bss->hold);
 173         WARN_ON(r < 0);
 174 }
 175
 176
 177 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 178 int get_wiphy_idx(struct wiphy *wiphy);
 179
 180 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 181
 182 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 183                           struct net *net);
 184
 185 static inline void wdev_lock(struct wireless_dev *wdev)
 186         __acquires(wdev)
 187 {
 188         mutex_lock(&wdev->mtx);
 189         __acquire(wdev->mtx);
 190 }
 191
 192 static inline void wdev_unlock(struct wireless_dev *wdev)
 193         __releases(wdev)
 194 {
 195         __release(wdev->mtx);
 196         mutex_unlock(&wdev->mtx);
 197 }
 198
 199 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 200
 201 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 202 {
 203         ASSERT_RTNL();
 204
 205         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 206                rdev->num_running_ifaces > 0;
 207 }
 208
 209 enum cfg80211_event_type {
 210         EVENT_CONNECT_RESULT,
 211         EVENT_ROAMED,
 212         EVENT_DISCONNECTED,
 213         EVENT_IBSS_JOINED,
 214         EVENT_STOPPED,
 215 };
 216
 217 struct cfg80211_event {
 218         struct list_head list;
 219         enum cfg80211_event_type type;
 220
 221         union {
 222                 struct {
 223                         u8 bssid[ETH_ALEN];
 224                         const u8 *req_ie;
 225                         const u8 *resp_ie;
 226                         size_t req_ie_len;
 227                         size_t resp_ie_len;
 228                         struct cfg80211_bss *bss;
 229                         int status; /* -1 = failed; 0..65535 = status code */
 230                 } cr;
 231                 struct {
 232                         const u8 *req_ie;
 233                         const u8 *resp_ie;
 234                         size_t req_ie_len;
 235                         size_t resp_ie_len;
 236                         struct cfg80211_bss *bss;
 237                 } rm;
 238                 struct {
 239                         const u8 *ie;
 240                         size_t ie_len;
 241                         u16 reason;
 242                         bool locally_generated;
 243                 } dc;
 244                 struct {
 245                         u8 bssid[ETH_ALEN];
 246                         struct ieee80211_channel *channel;
 247                 } ij;
 248         };
 249 };
 250
 251 struct cfg80211_cached_keys {
 252         struct key_params params[CFG80211_MAX_WEP_KEYS];
 253         u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
 254         int def;
 255 };
 256
 257 enum cfg80211_chan_mode {
 258         CHAN_MODE_UNDEFINED,
 259         CHAN_MODE_SHARED,
 260         CHAN_MODE_EXCLUSIVE,
 261 };
 262
 263 struct cfg80211_beacon_registration {
 264         struct list_head list;
 265         u32 nlportid;
 266 };
 267
 268 struct cfg80211_iface_destroy {
 269         struct list_head list;
 270         u32 nlportid;
 271 };
 272
 273 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 274
 275 /* free object */
 276 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 277
 278 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 279                         char *newname);
 280
 281 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 282
 283 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 284 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 285                       unsigned long age_secs);
 286
 287 /* IBSS */
 288 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 289                        struct net_device *dev,
 290                        struct cfg80211_ibss_params *params,
 291                        struct cfg80211_cached_keys *connkeys);
 292 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 293 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 294                           struct net_device *dev, bool nowext);
 295 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 296                         struct net_device *dev, bool nowext);
 297 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 298                             struct ieee80211_channel *channel);
 299 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 300                             struct wireless_dev *wdev);
 301
 302 /* mesh */
 303 extern const struct mesh_config default_mesh_config;
 304 extern const struct mesh_setup default_mesh_setup;
 305 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 306                          struct net_device *dev,
 307                          struct mesh_setup *setup,
 308                          const struct mesh_config *conf);
 309 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 310                        struct net_device *dev,
 311                        struct mesh_setup *setup,
 312                        const struct mesh_config *conf);
 313 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 314                           struct net_device *dev);
 315 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 316                         struct net_device *dev);
 317 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 318                               struct wireless_dev *wdev,
 319                               struct cfg80211_chan_def *chandef);
 320
 321 /* OCB */
 322 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 323                         struct net_device *dev,
 324                         struct ocb_setup *setup);
 325 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 326                       struct net_device *dev,
 327                       struct ocb_setup *setup);
 328 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 329                          struct net_device *dev);
 330 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 331                        struct net_device *dev);
 332
 333 /* AP */
 334 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 335                        struct net_device *dev, bool notify);
 336 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 337                      struct net_device *dev, bool notify);
 338
 339 /* MLME */
 340 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 341                        struct net_device *dev,
 342                        struct ieee80211_channel *chan,
 343                        enum nl80211_auth_type auth_type,
 344                        const u8 *bssid,
 345                        const u8 *ssid, int ssid_len,
 346                        const u8 *ie, int ie_len,
 347                        const u8 *key, int key_len, int key_idx,
 348                        const u8 *auth_data, int auth_data_len);
 349 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 350                         struct net_device *dev,
 351                         struct ieee80211_channel *chan,
 352                         const u8 *bssid,
 353                         const u8 *ssid, int ssid_len,
 354                         struct cfg80211_assoc_request *req);
 355 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 356                          struct net_device *dev, const u8 *bssid,
 357                          const u8 *ie, int ie_len, u16 reason,
 358                          bool local_state_change);
 359 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 360                            struct net_device *dev, const u8 *bssid,
 361                            const u8 *ie, int ie_len, u16 reason,
 362                            bool local_state_change);
 363 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 364                         struct net_device *dev);
 365 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 366                                 u16 frame_type, const u8 *match_data,
 367                                 int match_len);
 368 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
 369 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 370 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 371 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 372                           struct wireless_dev *wdev,
 373                           struct cfg80211_mgmt_tx_params *params,
 374                           u64 *cookie);
 375 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 376                                const struct ieee80211_ht_cap *ht_capa_mask);
 377 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 378                                 const struct ieee80211_vht_cap *vht_capa_mask);
 379
 380 /* SME events */
 381 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 382                      struct net_device *dev,
 383                      struct cfg80211_connect_params *connect,
 384                      struct cfg80211_cached_keys *connkeys,
 385                      const u8 *prev_bssid);
 386 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 387                                const u8 *req_ie, size_t req_ie_len,
 388                                const u8 *resp_ie, size_t resp_ie_len,
 389                                int status, bool wextev,
 390                                struct cfg80211_bss *bss);
 391 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 392                              size_t ie_len, u16 reason, bool from_ap);
 393 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 394                         struct net_device *dev, u16 reason,
 395                         bool wextev);
 396 void __cfg80211_roamed(struct wireless_dev *wdev,
 397                        struct cfg80211_bss *bss,
 398                        const u8 *req_ie, size_t req_ie_len,
 399                        const u8 *resp_ie, size_t resp_ie_len);
 400 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 401                               struct wireless_dev *wdev);
 402
 403 /* SME implementation */
 404 void cfg80211_conn_work(struct work_struct *work);
 405 void cfg80211_sme_scan_done(struct net_device *dev);
 406 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 407 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 408 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 409 void cfg80211_sme_deauth(struct wireless_dev *wdev);
 410 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 411 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 412 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
 413
 414 /* internal helpers */
 415 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 416 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 417                                    struct key_params *params, int key_idx,
 418                                    bool pairwise, const u8 *mac_addr);
 419 void __cfg80211_scan_done(struct work_struct *wk);
 420 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 421                            bool send_message);
 422 void __cfg80211_sched_scan_results(struct work_struct *wk);
 423 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 424                                bool driver_initiated);
 425 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 426 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 427                           struct net_device *dev, enum nl80211_iftype ntype,
 428                           u32 *flags, struct vif_params *params);
 429 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 430 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 431
 432 /**
 433  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 434  * @wiphy: the wiphy to validate against
 435  * @chandef: the channel definition to check
 436  *
 437  * Checks if chandef is usable and we can/need start CAC on such channel.
 438  *
 439  * Return: Return true if all channels available and at least
 440  *         one channel require CAC (NL80211_DFS_USABLE)
 441  */
 442 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 443                                  const struct cfg80211_chan_def *chandef);
 444
 445 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 446                             const struct cfg80211_chan_def *chandef,
 447                             enum nl80211_dfs_state dfs_state);
 448
 449 void cfg80211_dfs_channels_update_work(struct work_struct *work);
 450
 451 unsigned int
 452 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 453                               const struct cfg80211_chan_def *chandef);
 454
 455 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 456 {
 457         unsigned long end = jiffies;
 458
 459         if (end >= start)
 460                 return jiffies_to_msecs(end - start);
 461
 462         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 463 }
 464
 465 void
 466 cfg80211_get_chan_state(struct wireless_dev *wdev,
 467                         struct ieee80211_channel **chan,
 468                         enum cfg80211_chan_mode *chanmode,
 469                         u8 *radar_detect);
 470
 471 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 472                                  struct cfg80211_chan_def *chandef);
 473
 474 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 475                            const u8 *rates, unsigned int n_rates,
 476                            u32 *mask);
 477
 478 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 479                                  enum nl80211_iftype iftype, u32 beacon_int);
 480
 481 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 482                                enum nl80211_iftype iftype, int num);
 483
 484 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 485                       struct wireless_dev *wdev);
 486 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 487                     struct wireless_dev *wdev);
 488
 489 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 490                               struct wireless_dev *wdev);
 491
 492 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
 493                        struct wireless_dev *wdev);
 494
 495 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
 496
 497 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 498 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 499 #else
 500 /*
 501  * Trick to enable using it as a condition,
 502  * and also not give a warning when it's
 503  * not used that way.
 504  */
 505 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 506 #endif
 507
 508 #endif /* __NET_WIRELESS_CORE_H */