Pileus Git - ~andy/linux/blob - 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/mutex.h>
   9 #include <linux/list.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/kref.h>
  12 #include <linux/rbtree.h>
  13 #include <linux/debugfs.h>
  14 #include <linux/rfkill.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/rtnetlink.h>
  17 #include <net/genetlink.h>
  18 #include <net/cfg80211.h>
  19 #include "reg.h"
  20
  21 struct cfg80211_registered_device {
  22         const struct cfg80211_ops *ops;
  23         struct list_head list;
  24         /* we hold this mutex during any call so that
  25          * we cannot do multiple calls at once, and also
  26          * to avoid the deregister call to proceed while
  27          * any call is in progress */
  28         struct mutex mtx;
  29
  30         /* rfkill support */
  31         struct rfkill_ops rfkill_ops;
  32         struct rfkill *rfkill;
  33         struct work_struct rfkill_sync;
  34
  35         /* ISO / IEC 3166 alpha2 for which this device is receiving
  36          * country IEs on, this can help disregard country IEs from APs
  37          * on the same alpha2 quickly. The alpha2 may differ from
  38          * cfg80211_regdomain's alpha2 when an intersection has occurred.
  39          * If the AP is reconfigured this can also be used to tell us if
  40          * the country on the country IE changed. */
  41         char country_ie_alpha2[2];
  42
  43         /* If a Country IE has been received this tells us the environment
  44          * which its telling us its in. This defaults to ENVIRON_ANY */
  45         enum environment_cap env;
  46
  47         /* wiphy index, internal only */
  48         int wiphy_idx;
  49
  50         /* associated wireless interfaces */
  51         struct mutex devlist_mtx;
  52         /* protected by devlist_mtx or RCU */
  53         struct list_head wdev_list;
  54         int devlist_generation, wdev_id;
  55         int opencount; /* also protected by devlist_mtx */
  56         wait_queue_head_t dev_wait;
  57
  58         struct list_head beacon_registrations;
  59         spinlock_t beacon_registrations_lock;
  60
  61         /* protected by RTNL only */
  62         int num_running_ifaces;
  63         int num_running_monitor_ifaces;
  64
  65         /* BSSes/scanning */
  66         spinlock_t bss_lock;
  67         struct list_head bss_list;
  68         struct rb_root bss_tree;
  69         u32 bss_generation;
  70         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  71         struct cfg80211_sched_scan_request *sched_scan_req;
  72         unsigned long suspend_at;
  73         struct work_struct scan_done_wk;
  74         struct work_struct sched_scan_results_wk;
  75
  76         struct mutex sched_scan_mtx;
  77
  78 #ifdef CONFIG_NL80211_TESTMODE
  79         struct genl_info *testmode_info;
  80 #endif
  81
  82         struct work_struct conn_work;
  83         struct work_struct event_work;
  84
  85         struct cfg80211_wowlan *wowlan;
  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 __attribute__((__aligned__(NETDEV_ALIGN)));
  90 };
  91
  92 static inline
  93 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
  94 {
  95         BUG_ON(!wiphy);
  96         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
  97 }
  98
  99 /* Note 0 is valid, hence phy0 */
 100 static inline
 101 bool wiphy_idx_valid(int wiphy_idx)
 102 {
 103         return wiphy_idx >= 0;
 104 }
 105
 106 static inline void
 107 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 108 {
 109         int i;
 110
 111         if (!rdev->wowlan)
 112                 return;
 113         for (i = 0; i < rdev->wowlan->n_patterns; i++)
 114                 kfree(rdev->wowlan->patterns[i].mask);
 115         kfree(rdev->wowlan->patterns);
 116         kfree(rdev->wowlan);
 117 }
 118
 119 extern struct workqueue_struct *cfg80211_wq;
 120 extern struct mutex cfg80211_mutex;
 121 extern struct list_head cfg80211_rdev_list;
 122 extern int cfg80211_rdev_list_generation;
 123
 124 static inline void assert_cfg80211_lock(void)
 125 {
 126         lockdep_assert_held(&cfg80211_mutex);
 127 }
 128
 129 /*
 130  * You can use this to mark a wiphy_idx as not having an associated wiphy.
 131  * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
 132  */
 133 #define WIPHY_IDX_STALE -1
 134
 135 struct cfg80211_internal_bss {
 136         struct list_head list;
 137         struct rb_node rbn;
 138         unsigned long ts;
 139         struct kref ref;
 140         atomic_t hold;
 141         bool beacon_ies_allocated;
 142         bool proberesp_ies_allocated;
 143
 144         /* must be last because of priv member */
 145         struct cfg80211_bss pub;
 146 };
 147
 148 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 149 {
 150         return container_of(pub, struct cfg80211_internal_bss, pub);
 151 }
 152
 153 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 154 {
 155         atomic_inc(&bss->hold);
 156 }
 157
 158 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 159 {
 160         int r = atomic_dec_return(&bss->hold);
 161         WARN_ON(r < 0);
 162 }
 163
 164
 165 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 166 int get_wiphy_idx(struct wiphy *wiphy);
 167
 168 /* requires cfg80211_rdev_mutex to be held! */
 169 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 170
 171 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */
 172 extern struct cfg80211_registered_device *
 173 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
 174
 175 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 176                           struct net *net);
 177
 178 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
 179 {
 180         mutex_lock(&rdev->mtx);
 181 }
 182
 183 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
 184 {
 185         BUG_ON(IS_ERR(rdev) || !rdev);
 186         mutex_unlock(&rdev->mtx);
 187 }
 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_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
 204 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 205
 206 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 207 {
 208         ASSERT_RTNL();
 209
 210         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 211                rdev->num_running_ifaces > 0;
 212 }
 213
 214 enum cfg80211_event_type {
 215         EVENT_CONNECT_RESULT,
 216         EVENT_ROAMED,
 217         EVENT_DISCONNECTED,
 218         EVENT_IBSS_JOINED,
 219 };
 220
 221 struct cfg80211_event {
 222         struct list_head list;
 223         enum cfg80211_event_type type;
 224
 225         union {
 226                 struct {
 227                         u8 bssid[ETH_ALEN];
 228                         const u8 *req_ie;
 229                         const u8 *resp_ie;
 230                         size_t req_ie_len;
 231                         size_t resp_ie_len;
 232                         u16 status;
 233                 } cr;
 234                 struct {
 235                         const u8 *req_ie;
 236                         const u8 *resp_ie;
 237                         size_t req_ie_len;
 238                         size_t resp_ie_len;
 239                         struct cfg80211_bss *bss;
 240                 } rm;
 241                 struct {
 242                         const u8 *ie;
 243                         size_t ie_len;
 244                         u16 reason;
 245                 } dc;
 246                 struct {
 247                         u8 bssid[ETH_ALEN];
 248                 } ij;
 249         };
 250 };
 251
 252 struct cfg80211_cached_keys {
 253         struct key_params params[6];
 254         u8 data[6][WLAN_MAX_KEY_LEN];
 255         int def, defmgmt;
 256 };
 257
 258 enum cfg80211_chan_mode {
 259         CHAN_MODE_UNDEFINED,
 260         CHAN_MODE_SHARED,
 261         CHAN_MODE_EXCLUSIVE,
 262 };
 263
 264 struct cfg80211_beacon_registration {
 265         struct list_head list;
 266         u32 nlportid;
 267 };
 268
 269 /* free object */
 270 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 271
 272 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 273                                char *newname);
 274
 275 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 276
 277 void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
 278 void cfg80211_bss_age(struct cfg80211_registered_device *dev,
 279                       unsigned long age_secs);
 280
 281 /* IBSS */
 282 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 283                          struct net_device *dev,
 284                          struct cfg80211_ibss_params *params,
 285                          struct cfg80211_cached_keys *connkeys);
 286 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 287                        struct net_device *dev,
 288                        struct cfg80211_ibss_params *params,
 289                        struct cfg80211_cached_keys *connkeys);
 290 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 291 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 292                           struct net_device *dev, bool nowext);
 293 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 294                         struct net_device *dev, bool nowext);
 295 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
 296 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 297                             struct wireless_dev *wdev);
 298
 299 /* mesh */
 300 extern const struct mesh_config default_mesh_config;
 301 extern const struct mesh_setup default_mesh_setup;
 302 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 303                          struct net_device *dev,
 304                          struct mesh_setup *setup,
 305                          const struct mesh_config *conf);
 306 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 307                        struct net_device *dev,
 308                        struct mesh_setup *setup,
 309                        const struct mesh_config *conf);
 310 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 311                         struct net_device *dev);
 312 int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
 313                            struct wireless_dev *wdev, int freq,
 314                            enum nl80211_channel_type channel_type);
 315
 316 /* AP */
 317 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 318                      struct net_device *dev);
 319
 320 /* MLME */
 321 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 322                          struct net_device *dev,
 323                          struct ieee80211_channel *chan,
 324                          enum nl80211_auth_type auth_type,
 325                          const u8 *bssid,
 326                          const u8 *ssid, int ssid_len,
 327                          const u8 *ie, int ie_len,
 328                          const u8 *key, int key_len, int key_idx,
 329                          const u8 *sae_data, int sae_data_len);
 330 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 331                        struct net_device *dev, struct ieee80211_channel *chan,
 332                        enum nl80211_auth_type auth_type, const u8 *bssid,
 333                        const u8 *ssid, int ssid_len,
 334                        const u8 *ie, int ie_len,
 335                        const u8 *key, int key_len, int key_idx,
 336                        const u8 *sae_data, int sae_data_len);
 337 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 338                           struct net_device *dev,
 339                           struct ieee80211_channel *chan,
 340                           const u8 *bssid, const u8 *prev_bssid,
 341                           const u8 *ssid, int ssid_len,
 342                           const u8 *ie, int ie_len, bool use_mfp,
 343                           struct cfg80211_crypto_settings *crypt,
 344                           u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 345                           struct ieee80211_ht_cap *ht_capa_mask);
 346 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 347                         struct net_device *dev, struct ieee80211_channel *chan,
 348                         const u8 *bssid, const u8 *prev_bssid,
 349                         const u8 *ssid, int ssid_len,
 350                         const u8 *ie, int ie_len, bool use_mfp,
 351                         struct cfg80211_crypto_settings *crypt,
 352                         u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 353                         struct ieee80211_ht_cap *ht_capa_mask);
 354 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 355                            struct net_device *dev, const u8 *bssid,
 356                            const u8 *ie, int ie_len, u16 reason,
 357                            bool local_state_change);
 358 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 359                          struct net_device *dev, const u8 *bssid,
 360                          const u8 *ie, int ie_len, u16 reason,
 361                          bool local_state_change);
 362 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 363                            struct net_device *dev, const u8 *bssid,
 364                            const u8 *ie, int ie_len, u16 reason,
 365                            bool local_state_change);
 366 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 367                         struct net_device *dev);
 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 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 374                                 u16 frame_type, const u8 *match_data,
 375                                 int match_len);
 376 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 377 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 378 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 379                           struct wireless_dev *wdev,
 380                           struct ieee80211_channel *chan, bool offchan,
 381                           enum nl80211_channel_type channel_type,
 382                           bool channel_type_valid, unsigned int wait,
 383                           const u8 *buf, size_t len, bool no_cck,
 384                           bool dont_wait_for_ack, u64 *cookie);
 385 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 386                                const struct ieee80211_ht_cap *ht_capa_mask);
 387
 388 /* SME */
 389 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 390                        struct net_device *dev,
 391                        struct cfg80211_connect_params *connect,
 392                        struct cfg80211_cached_keys *connkeys,
 393                        const u8 *prev_bssid);
 394 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 395                      struct net_device *dev,
 396                      struct cfg80211_connect_params *connect,
 397                      struct cfg80211_cached_keys *connkeys);
 398 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 399                           struct net_device *dev, u16 reason,
 400                           bool wextev);
 401 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 402                         struct net_device *dev, u16 reason,
 403                         bool wextev);
 404 void __cfg80211_roamed(struct wireless_dev *wdev,
 405                        struct cfg80211_bss *bss,
 406                        const u8 *req_ie, size_t req_ie_len,
 407                        const u8 *resp_ie, size_t resp_ie_len);
 408 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 409                               struct wireless_dev *wdev);
 410
 411 void cfg80211_conn_work(struct work_struct *work);
 412 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
 413 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
 414
 415 /* internal helpers */
 416 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 417 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 418                                    struct key_params *params, int key_idx,
 419                                    bool pairwise, const u8 *mac_addr);
 420 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 421                              size_t ie_len, u16 reason, bool from_ap);
 422 void cfg80211_sme_scan_done(struct net_device *dev);
 423 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
 424 void cfg80211_sme_disassoc(struct net_device *dev,
 425                            struct cfg80211_internal_bss *bss);
 426 void __cfg80211_scan_done(struct work_struct *wk);
 427 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
 428 void __cfg80211_sched_scan_results(struct work_struct *wk);
 429 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 430                                bool driver_initiated);
 431 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 432 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 433                           struct net_device *dev, enum nl80211_iftype ntype,
 434                           u32 *flags, struct vif_params *params);
 435 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 436 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 437
 438 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 439                                  struct wireless_dev *wdev,
 440                                  enum nl80211_iftype iftype,
 441                                  struct ieee80211_channel *chan,
 442                                  enum cfg80211_chan_mode chanmode);
 443
 444 static inline int
 445 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
 446                               struct wireless_dev *wdev,
 447                               enum nl80211_iftype iftype)
 448 {
 449         return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
 450                                             CHAN_MODE_UNDEFINED);
 451 }
 452
 453 static inline int
 454 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
 455                            enum nl80211_iftype iftype)
 456 {
 457         return cfg80211_can_change_interface(rdev, NULL, iftype);
 458 }
 459
 460 static inline int
 461 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
 462                       struct wireless_dev *wdev,
 463                       struct ieee80211_channel *chan,
 464                       enum cfg80211_chan_mode chanmode)
 465 {
 466         return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
 467                                             chan, chanmode);
 468 }
 469
 470 void
 471 cfg80211_get_chan_state(struct wireless_dev *wdev,
 472                         struct ieee80211_channel **chan,
 473                         enum cfg80211_chan_mode *chanmode);
 474
 475 struct ieee80211_channel *
 476 rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
 477                   int freq, enum nl80211_channel_type channel_type);
 478 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 479                                  int freq, enum nl80211_channel_type chantype);
 480
 481 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 482                            const u8 *rates, unsigned int n_rates,
 483                            u32 *mask);
 484
 485 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 486                                  u32 beacon_int);
 487
 488 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 489                                enum nl80211_iftype iftype, int num);
 490
 491 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
 492
 493 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 494 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 495 #else
 496 /*
 497  * Trick to enable using it as a condition,
 498  * and also not give a warning when it's
 499  * not used that way.
 500  */
 501 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 502 #endif
 503
 504 #endif /* __NET_WIRELESS_CORE_H */