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         /* associated wireless interfaces, protected by rtnl or RCU */
  54         struct list_head wdev_list;
  55         int devlist_generation, wdev_id;
  56         int opencount; /* also protected by devlist_mtx */
  57         wait_queue_head_t dev_wait;
  58
  59         struct list_head beacon_registrations;
  60         spinlock_t beacon_registrations_lock;
  61
  62         /* protected by RTNL only */
  63         int num_running_ifaces;
  64         int num_running_monitor_ifaces;
  65
  66         /* BSSes/scanning */
  67         spinlock_t bss_lock;
  68         struct list_head bss_list;
  69         struct rb_root bss_tree;
  70         u32 bss_generation;
  71         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  72         struct sk_buff *scan_msg;
  73         struct cfg80211_sched_scan_request __rcu *sched_scan_req;
  74         unsigned long suspend_at;
  75         struct work_struct scan_done_wk;
  76         struct work_struct sched_scan_results_wk;
  77
  78         struct genl_info *cur_cmd_info;
  79
  80         struct work_struct conn_work;
  81         struct work_struct event_work;
  82
  83         struct delayed_work dfs_update_channels_wk;
  84
  85         /* netlink port which started critical protocol (0 means not started) */
  86         u32 crit_proto_nlportid;
  87
  88         struct cfg80211_coalesce *coalesce;
  89
  90         spinlock_t destroy_list_lock;
  91         struct list_head destroy_list;
  92         struct work_struct destroy_work;
  93
  94         struct work_struct sched_scan_stop_wk;
  95
  96         /* must be last because of the way we do wiphy_priv(),
  97          * and it should at least be aligned to NETDEV_ALIGN */
  98         struct wiphy wiphy __aligned(NETDEV_ALIGN);
  99 };
 100
 101 static inline
 102 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
 103 {
 104         BUG_ON(!wiphy);
 105         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 106 }
 107
 108 static inline void
 109 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 110 {
 111 #ifdef CONFIG_PM
 112         int i;
 113
 114         if (!rdev->wiphy.wowlan_config)
 115                 return;
 116         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
 117                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
 118         kfree(rdev->wiphy.wowlan_config->patterns);
 119         if (rdev->wiphy.wowlan_config->tcp &&
 120             rdev->wiphy.wowlan_config->tcp->sock)
 121                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
 122         kfree(rdev->wiphy.wowlan_config->tcp);
 123         kfree(rdev->wiphy.wowlan_config->nd_config);
 124         kfree(rdev->wiphy.wowlan_config);
 125 #endif
 126 }
 127
 128 extern struct workqueue_struct *cfg80211_wq;
 129 extern struct list_head cfg80211_rdev_list;
 130 extern int cfg80211_rdev_list_generation;
 131
 132 struct cfg80211_internal_bss {
 133         struct list_head list;
 134         struct list_head hidden_list;
 135         struct rb_node rbn;
 136         unsigned long ts;
 137         unsigned long refcount;
 138         atomic_t hold;
 139
 140         /* must be last because of priv member */
 141         struct cfg80211_bss pub;
 142 };
 143
 144 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 145 {
 146         return container_of(pub, struct cfg80211_internal_bss, pub);
 147 }
 148
 149 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 150 {
 151         atomic_inc(&bss->hold);
 152 }
 153
 154 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 155 {
 156         int r = atomic_dec_return(&bss->hold);
 157         WARN_ON(r < 0);
 158 }
 159
 160
 161 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 162 int get_wiphy_idx(struct wiphy *wiphy);
 163
 164 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 165
 166 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 167                           struct net *net);
 168
 169 static inline void wdev_lock(struct wireless_dev *wdev)
 170         __acquires(wdev)
 171 {
 172         mutex_lock(&wdev->mtx);
 173         __acquire(wdev->mtx);
 174 }
 175
 176 static inline void wdev_unlock(struct wireless_dev *wdev)
 177         __releases(wdev)
 178 {
 179         __release(wdev->mtx);
 180         mutex_unlock(&wdev->mtx);
 181 }
 182
 183 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 184
 185 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 186 {
 187         ASSERT_RTNL();
 188
 189         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 190                rdev->num_running_ifaces > 0;
 191 }
 192
 193 enum cfg80211_event_type {
 194         EVENT_CONNECT_RESULT,
 195         EVENT_ROAMED,
 196         EVENT_DISCONNECTED,
 197         EVENT_IBSS_JOINED,
 198         EVENT_STOPPED,
 199 };
 200
 201 struct cfg80211_event {
 202         struct list_head list;
 203         enum cfg80211_event_type type;
 204
 205         union {
 206                 struct {
 207                         u8 bssid[ETH_ALEN];
 208                         const u8 *req_ie;
 209                         const u8 *resp_ie;
 210                         size_t req_ie_len;
 211                         size_t resp_ie_len;
 212                         u16 status;
 213                 } cr;
 214                 struct {
 215                         const u8 *req_ie;
 216                         const u8 *resp_ie;
 217                         size_t req_ie_len;
 218                         size_t resp_ie_len;
 219                         struct cfg80211_bss *bss;
 220                 } rm;
 221                 struct {
 222                         const u8 *ie;
 223                         size_t ie_len;
 224                         u16 reason;
 225                         bool locally_generated;
 226                 } dc;
 227                 struct {
 228                         u8 bssid[ETH_ALEN];
 229                         struct ieee80211_channel *channel;
 230                 } ij;
 231         };
 232 };
 233
 234 struct cfg80211_cached_keys {
 235         struct key_params params[6];
 236         u8 data[6][WLAN_MAX_KEY_LEN];
 237         int def, defmgmt;
 238 };
 239
 240 enum cfg80211_chan_mode {
 241         CHAN_MODE_UNDEFINED,
 242         CHAN_MODE_SHARED,
 243         CHAN_MODE_EXCLUSIVE,
 244 };
 245
 246 struct cfg80211_beacon_registration {
 247         struct list_head list;
 248         u32 nlportid;
 249 };
 250
 251 struct cfg80211_iface_destroy {
 252         struct list_head list;
 253         u32 nlportid;
 254 };
 255
 256 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 257
 258 /* free object */
 259 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 260
 261 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 262                         char *newname);
 263
 264 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 265
 266 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 267 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 268                       unsigned long age_secs);
 269
 270 /* IBSS */
 271 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 272                        struct net_device *dev,
 273                        struct cfg80211_ibss_params *params,
 274                        struct cfg80211_cached_keys *connkeys);
 275 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 276 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 277                           struct net_device *dev, bool nowext);
 278 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 279                         struct net_device *dev, bool nowext);
 280 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 281                             struct ieee80211_channel *channel);
 282 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 283                             struct wireless_dev *wdev);
 284
 285 /* mesh */
 286 extern const struct mesh_config default_mesh_config;
 287 extern const struct mesh_setup default_mesh_setup;
 288 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 289                          struct net_device *dev,
 290                          struct mesh_setup *setup,
 291                          const struct mesh_config *conf);
 292 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 293                        struct net_device *dev,
 294                        struct mesh_setup *setup,
 295                        const struct mesh_config *conf);
 296 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 297                           struct net_device *dev);
 298 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 299                         struct net_device *dev);
 300 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 301                               struct wireless_dev *wdev,
 302                               struct cfg80211_chan_def *chandef);
 303
 304 /* OCB */
 305 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 306                         struct net_device *dev,
 307                         struct ocb_setup *setup);
 308 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 309                       struct net_device *dev,
 310                       struct ocb_setup *setup);
 311 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 312                          struct net_device *dev);
 313 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 314                        struct net_device *dev);
 315
 316 /* AP */
 317 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 318                        struct net_device *dev, bool notify);
 319 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 320                      struct net_device *dev, bool notify);
 321
 322 /* MLME */
 323 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 324                        struct net_device *dev,
 325                        struct ieee80211_channel *chan,
 326                        enum nl80211_auth_type auth_type,
 327                        const u8 *bssid,
 328                        const u8 *ssid, int ssid_len,
 329                        const u8 *ie, int ie_len,
 330                        const u8 *key, int key_len, int key_idx,
 331                        const u8 *sae_data, int sae_data_len);
 332 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 333                         struct net_device *dev,
 334                         struct ieee80211_channel *chan,
 335                         const u8 *bssid,
 336                         const u8 *ssid, int ssid_len,
 337                         struct cfg80211_assoc_request *req);
 338 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 339                          struct net_device *dev, const u8 *bssid,
 340                          const u8 *ie, int ie_len, u16 reason,
 341                          bool local_state_change);
 342 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 343                            struct net_device *dev, const u8 *bssid,
 344                            const u8 *ie, int ie_len, u16 reason,
 345                            bool local_state_change);
 346 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 347                         struct net_device *dev);
 348 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 349                                 u16 frame_type, const u8 *match_data,
 350                                 int match_len);
 351 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 352 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 353 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 354                           struct wireless_dev *wdev,
 355                           struct cfg80211_mgmt_tx_params *params,
 356                           u64 *cookie);
 357 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 358                                const struct ieee80211_ht_cap *ht_capa_mask);
 359 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 360                                 const struct ieee80211_vht_cap *vht_capa_mask);
 361
 362 /* SME events */
 363 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 364                      struct net_device *dev,
 365                      struct cfg80211_connect_params *connect,
 366                      struct cfg80211_cached_keys *connkeys,
 367                      const u8 *prev_bssid);
 368 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 369                                const u8 *req_ie, size_t req_ie_len,
 370                                const u8 *resp_ie, size_t resp_ie_len,
 371                                u16 status, bool wextev,
 372                                struct cfg80211_bss *bss);
 373 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 374                              size_t ie_len, u16 reason, bool from_ap);
 375 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 376                         struct net_device *dev, u16 reason,
 377                         bool wextev);
 378 void __cfg80211_roamed(struct wireless_dev *wdev,
 379                        struct cfg80211_bss *bss,
 380                        const u8 *req_ie, size_t req_ie_len,
 381                        const u8 *resp_ie, size_t resp_ie_len);
 382 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 383                               struct wireless_dev *wdev);
 384
 385 /* SME implementation */
 386 void cfg80211_conn_work(struct work_struct *work);
 387 void cfg80211_sme_scan_done(struct net_device *dev);
 388 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 389 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 390 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 391 void cfg80211_sme_deauth(struct wireless_dev *wdev);
 392 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 393 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 394
 395 /* internal helpers */
 396 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 397 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 398                                    struct key_params *params, int key_idx,
 399                                    bool pairwise, const u8 *mac_addr);
 400 void __cfg80211_scan_done(struct work_struct *wk);
 401 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 402                            bool send_message);
 403 void __cfg80211_sched_scan_results(struct work_struct *wk);
 404 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 405                                bool driver_initiated);
 406 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 407 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 408                           struct net_device *dev, enum nl80211_iftype ntype,
 409                           u32 *flags, struct vif_params *params);
 410 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 411 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 412
 413 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 414                                  struct wireless_dev *wdev,
 415                                  enum nl80211_iftype iftype,
 416                                  struct ieee80211_channel *chan,
 417                                  enum cfg80211_chan_mode chanmode,
 418                                  u8 radar_detect);
 419
 420 /**
 421  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 422  * @wiphy: the wiphy to validate against
 423  * @chandef: the channel definition to check
 424  *
 425  * Checks if chandef is usable and we can/need start CAC on such channel.
 426  *
 427  * Return: Return true if all channels available and at least
 428  *         one channel require CAC (NL80211_DFS_USABLE)
 429  */
 430 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 431                                  const struct cfg80211_chan_def *chandef);
 432
 433 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 434                             const struct cfg80211_chan_def *chandef,
 435                             enum nl80211_dfs_state dfs_state);
 436
 437 void cfg80211_dfs_channels_update_work(struct work_struct *work);
 438
 439 unsigned int
 440 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 441                               const struct cfg80211_chan_def *chandef);
 442
 443 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 444 {
 445         unsigned long end = jiffies;
 446
 447         if (end >= start)
 448                 return jiffies_to_msecs(end - start);
 449
 450         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 451 }
 452
 453 void
 454 cfg80211_get_chan_state(struct wireless_dev *wdev,
 455                         struct ieee80211_channel **chan,
 456                         enum cfg80211_chan_mode *chanmode,
 457                         u8 *radar_detect);
 458
 459 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 460                                  struct cfg80211_chan_def *chandef);
 461
 462 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 463                            const u8 *rates, unsigned int n_rates,
 464                            u32 *mask);
 465
 466 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 467                                  u32 beacon_int);
 468
 469 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 470                                enum nl80211_iftype iftype, int num);
 471
 472 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 473                       struct wireless_dev *wdev);
 474 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 475                     struct wireless_dev *wdev);
 476
 477 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 478                               struct wireless_dev *wdev);
 479
 480 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
 481
 482 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 483 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 484 #else
 485 /*
 486  * Trick to enable using it as a condition,
 487  * and also not give a warning when it's
 488  * not used that way.
 489  */
 490 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 491 #endif
 492
 493 #endif /* __NET_WIRELESS_CORE_H */