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