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         /* If a Country IE has been received this tells us the environment
  40          * which its telling us its in. This defaults to ENVIRON_ANY */
  41         enum environment_cap env;
  42
  43         /* wiphy index, internal only */
  44         int wiphy_idx;
  45
  46         /* associated wireless interfaces, protected by rtnl or RCU */
  47         struct list_head wdev_list;
  48         int devlist_generation, wdev_id;
  49         int opencount; /* also protected by devlist_mtx */
  50         wait_queue_head_t dev_wait;
  51
  52         struct list_head beacon_registrations;
  53         spinlock_t beacon_registrations_lock;
  54
  55         /* protected by RTNL only */
  56         int num_running_ifaces;
  57         int num_running_monitor_ifaces;
  58
  59         /* BSSes/scanning */
  60         spinlock_t bss_lock;
  61         struct list_head bss_list;
  62         struct rb_root bss_tree;
  63         u32 bss_generation;
  64         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  65         struct sk_buff *scan_msg;
  66         struct cfg80211_sched_scan_request *sched_scan_req;
  67         unsigned long suspend_at;
  68         struct work_struct scan_done_wk;
  69         struct work_struct sched_scan_results_wk;
  70
  71         struct genl_info *cur_cmd_info;
  72
  73         struct work_struct conn_work;
  74         struct work_struct event_work;
  75
  76         struct delayed_work dfs_update_channels_wk;
  77
  78         /* netlink port which started critical protocol (0 means not started) */
  79         u32 crit_proto_nlportid;
  80
  81         struct cfg80211_coalesce *coalesce;
  82
  83         spinlock_t destroy_list_lock;
  84         struct list_head destroy_list;
  85         struct work_struct destroy_work;
  86
  87         /* must be last because of the way we do wiphy_priv(),
  88          * and it should at least be aligned to NETDEV_ALIGN */
  89         struct wiphy wiphy __aligned(NETDEV_ALIGN);
  90 };
  91
  92 static inline
  93 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
  94 {
  95         BUG_ON(!wiphy);
  96         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
  97 }
  98
  99 static inline void
 100 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 101 {
 102 #ifdef CONFIG_PM
 103         int i;
 104
 105         if (!rdev->wiphy.wowlan_config)
 106                 return;
 107         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
 108                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
 109         kfree(rdev->wiphy.wowlan_config->patterns);
 110         if (rdev->wiphy.wowlan_config->tcp &&
 111             rdev->wiphy.wowlan_config->tcp->sock)
 112                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
 113         kfree(rdev->wiphy.wowlan_config->tcp);
 114         kfree(rdev->wiphy.wowlan_config);
 115 #endif
 116 }
 117
 118 extern struct workqueue_struct *cfg80211_wq;
 119 extern struct list_head cfg80211_rdev_list;
 120 extern int cfg80211_rdev_list_generation;
 121
 122 struct cfg80211_internal_bss {
 123         struct list_head list;
 124         struct list_head hidden_list;
 125         struct rb_node rbn;
 126         unsigned long ts;
 127         unsigned long refcount;
 128         atomic_t hold;
 129
 130         /* must be last because of priv member */
 131         struct cfg80211_bss pub;
 132 };
 133
 134 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 135 {
 136         return container_of(pub, struct cfg80211_internal_bss, pub);
 137 }
 138
 139 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 140 {
 141         atomic_inc(&bss->hold);
 142 }
 143
 144 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 145 {
 146         int r = atomic_dec_return(&bss->hold);
 147         WARN_ON(r < 0);
 148 }
 149
 150
 151 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 152 int get_wiphy_idx(struct wiphy *wiphy);
 153
 154 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 155
 156 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 157                           struct net *net);
 158
 159 static inline void wdev_lock(struct wireless_dev *wdev)
 160         __acquires(wdev)
 161 {
 162         mutex_lock(&wdev->mtx);
 163         __acquire(wdev->mtx);
 164 }
 165
 166 static inline void wdev_unlock(struct wireless_dev *wdev)
 167         __releases(wdev)
 168 {
 169         __release(wdev->mtx);
 170         mutex_unlock(&wdev->mtx);
 171 }
 172
 173 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 174
 175 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 176 {
 177         ASSERT_RTNL();
 178
 179         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 180                rdev->num_running_ifaces > 0;
 181 }
 182
 183 enum cfg80211_event_type {
 184         EVENT_CONNECT_RESULT,
 185         EVENT_ROAMED,
 186         EVENT_DISCONNECTED,
 187         EVENT_IBSS_JOINED,
 188 };
 189
 190 struct cfg80211_event {
 191         struct list_head list;
 192         enum cfg80211_event_type type;
 193
 194         union {
 195                 struct {
 196                         u8 bssid[ETH_ALEN];
 197                         const u8 *req_ie;
 198                         const u8 *resp_ie;
 199                         size_t req_ie_len;
 200                         size_t resp_ie_len;
 201                         u16 status;
 202                 } cr;
 203                 struct {
 204                         const u8 *req_ie;
 205                         const u8 *resp_ie;
 206                         size_t req_ie_len;
 207                         size_t resp_ie_len;
 208                         struct cfg80211_bss *bss;
 209                 } rm;
 210                 struct {
 211                         const u8 *ie;
 212                         size_t ie_len;
 213                         u16 reason;
 214                 } dc;
 215                 struct {
 216                         u8 bssid[ETH_ALEN];
 217                         struct ieee80211_channel *channel;
 218                 } ij;
 219         };
 220 };
 221
 222 struct cfg80211_cached_keys {
 223         struct key_params params[6];
 224         u8 data[6][WLAN_MAX_KEY_LEN];
 225         int def, defmgmt;
 226 };
 227
 228 enum cfg80211_chan_mode {
 229         CHAN_MODE_UNDEFINED,
 230         CHAN_MODE_SHARED,
 231         CHAN_MODE_EXCLUSIVE,
 232 };
 233
 234 struct cfg80211_beacon_registration {
 235         struct list_head list;
 236         u32 nlportid;
 237 };
 238
 239 struct cfg80211_iface_destroy {
 240         struct list_head list;
 241         u32 nlportid;
 242 };
 243
 244 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 245
 246 /* free object */
 247 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 248
 249 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 250                         char *newname);
 251
 252 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 253
 254 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 255 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 256                       unsigned long age_secs);
 257
 258 /* IBSS */
 259 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 260                        struct net_device *dev,
 261                        struct cfg80211_ibss_params *params,
 262                        struct cfg80211_cached_keys *connkeys);
 263 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 264 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 265                           struct net_device *dev, bool nowext);
 266 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 267                         struct net_device *dev, bool nowext);
 268 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 269                             struct ieee80211_channel *channel);
 270 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 271                             struct wireless_dev *wdev);
 272
 273 /* mesh */
 274 extern const struct mesh_config default_mesh_config;
 275 extern const struct mesh_setup default_mesh_setup;
 276 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 277                          struct net_device *dev,
 278                          struct mesh_setup *setup,
 279                          const struct mesh_config *conf);
 280 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 281                        struct net_device *dev,
 282                        struct mesh_setup *setup,
 283                        const struct mesh_config *conf);
 284 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 285                         struct net_device *dev);
 286 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 287                               struct wireless_dev *wdev,
 288                               struct cfg80211_chan_def *chandef);
 289
 290 /* AP */
 291 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 292                      struct net_device *dev, bool notify);
 293
 294 /* MLME */
 295 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 296                        struct net_device *dev,
 297                        struct ieee80211_channel *chan,
 298                        enum nl80211_auth_type auth_type,
 299                        const u8 *bssid,
 300                        const u8 *ssid, int ssid_len,
 301                        const u8 *ie, int ie_len,
 302                        const u8 *key, int key_len, int key_idx,
 303                        const u8 *sae_data, int sae_data_len);
 304 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 305                         struct net_device *dev,
 306                         struct ieee80211_channel *chan,
 307                         const u8 *bssid,
 308                         const u8 *ssid, int ssid_len,
 309                         struct cfg80211_assoc_request *req);
 310 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 311                          struct net_device *dev, const u8 *bssid,
 312                          const u8 *ie, int ie_len, u16 reason,
 313                          bool local_state_change);
 314 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 315                            struct net_device *dev, const u8 *bssid,
 316                            const u8 *ie, int ie_len, u16 reason,
 317                            bool local_state_change);
 318 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 319                         struct net_device *dev);
 320 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 321                                 u16 frame_type, const u8 *match_data,
 322                                 int match_len);
 323 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 324 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 325 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 326                           struct wireless_dev *wdev,
 327                           struct cfg80211_mgmt_tx_params *params,
 328                           u64 *cookie);
 329 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 330                                const struct ieee80211_ht_cap *ht_capa_mask);
 331 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 332                                 const struct ieee80211_vht_cap *vht_capa_mask);
 333
 334 /* SME events */
 335 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 336                      struct net_device *dev,
 337                      struct cfg80211_connect_params *connect,
 338                      struct cfg80211_cached_keys *connkeys,
 339                      const u8 *prev_bssid);
 340 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 341                                const u8 *req_ie, size_t req_ie_len,
 342                                const u8 *resp_ie, size_t resp_ie_len,
 343                                u16 status, bool wextev,
 344                                struct cfg80211_bss *bss);
 345 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 346                              size_t ie_len, u16 reason, bool from_ap);
 347 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 348                         struct net_device *dev, u16 reason,
 349                         bool wextev);
 350 void __cfg80211_roamed(struct wireless_dev *wdev,
 351                        struct cfg80211_bss *bss,
 352                        const u8 *req_ie, size_t req_ie_len,
 353                        const u8 *resp_ie, size_t resp_ie_len);
 354 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 355                               struct wireless_dev *wdev);
 356
 357 /* SME implementation */
 358 void cfg80211_conn_work(struct work_struct *work);
 359 void cfg80211_sme_scan_done(struct net_device *dev);
 360 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 361 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 362 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 363 void cfg80211_sme_deauth(struct wireless_dev *wdev);
 364 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 365 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 366
 367 /* internal helpers */
 368 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 369 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 370                                    struct key_params *params, int key_idx,
 371                                    bool pairwise, const u8 *mac_addr);
 372 void __cfg80211_scan_done(struct work_struct *wk);
 373 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 374                            bool send_message);
 375 void __cfg80211_sched_scan_results(struct work_struct *wk);
 376 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 377                                bool driver_initiated);
 378 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 379 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 380                           struct net_device *dev, enum nl80211_iftype ntype,
 381                           u32 *flags, struct vif_params *params);
 382 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 383 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 384
 385 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 386                                  struct wireless_dev *wdev,
 387                                  enum nl80211_iftype iftype,
 388                                  struct ieee80211_channel *chan,
 389                                  enum cfg80211_chan_mode chanmode,
 390                                  u8 radar_detect);
 391
 392 /**
 393  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 394  * @wiphy: the wiphy to validate against
 395  * @chandef: the channel definition to check
 396  *
 397  * Checks if chandef is usable and we can/need start CAC on such channel.
 398  *
 399  * Return: Return true if all channels available and at least
 400  *         one channel require CAC (NL80211_DFS_USABLE)
 401  */
 402 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 403                                  const struct cfg80211_chan_def *chandef);
 404
 405 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 406                             const struct cfg80211_chan_def *chandef,
 407                             enum nl80211_dfs_state dfs_state);
 408
 409 void cfg80211_dfs_channels_update_work(struct work_struct *work);
 410
 411 unsigned int
 412 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 413                               const struct cfg80211_chan_def *chandef);
 414
 415 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 416 {
 417         unsigned long end = jiffies;
 418
 419         if (end >= start)
 420                 return jiffies_to_msecs(end - start);
 421
 422         return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
 423 }
 424
 425 void
 426 cfg80211_get_chan_state(struct wireless_dev *wdev,
 427                         struct ieee80211_channel **chan,
 428                         enum cfg80211_chan_mode *chanmode,
 429                         u8 *radar_detect);
 430
 431 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 432                                  struct cfg80211_chan_def *chandef);
 433
 434 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 435                            const u8 *rates, unsigned int n_rates,
 436                            u32 *mask);
 437
 438 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 439                                  u32 beacon_int);
 440
 441 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 442                                enum nl80211_iftype iftype, int num);
 443
 444 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 445                     struct wireless_dev *wdev);
 446
 447 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 448                               struct wireless_dev *wdev);
 449
 450 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
 451
 452 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 453 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 454 #else
 455 /*
 456  * Trick to enable using it as a condition,
 457  * and also not give a warning when it's
 458  * not used that way.
 459  */
 460 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 461 #endif
 462
 463 #endif /* __NET_WIRELESS_CORE_H */