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TOMOYO Linux Cross Reference
Linux/net/wireless/core.h

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  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         u32 bss_entries;
 75         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
 76         struct sk_buff *scan_msg;
 77         struct list_head sched_scan_req_list;
 78         unsigned long suspend_at;
 79         struct work_struct scan_done_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         struct work_struct destroy_work;
 94         struct work_struct sched_scan_stop_wk;
 95         struct work_struct sched_scan_res_wk;
 96 
 97         struct cfg80211_chan_def radar_chandef;
 98         struct work_struct propagate_radar_detect_wk;
 99 
100         struct cfg80211_chan_def cac_done_chandef;
101         struct work_struct propagate_cac_done_wk;
102 
103         /* must be last because of the way we do wiphy_priv(),
104          * and it should at least be aligned to NETDEV_ALIGN */
105         struct wiphy wiphy __aligned(NETDEV_ALIGN);
106 };
107 
108 static inline
109 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
110 {
111         BUG_ON(!wiphy);
112         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
113 }
114 
115 static inline void
116 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
117 {
118 #ifdef CONFIG_PM
119         int i;
120 
121         if (!rdev->wiphy.wowlan_config)
122                 return;
123         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
124                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
125         kfree(rdev->wiphy.wowlan_config->patterns);
126         if (rdev->wiphy.wowlan_config->tcp &&
127             rdev->wiphy.wowlan_config->tcp->sock)
128                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
129         kfree(rdev->wiphy.wowlan_config->tcp);
130         kfree(rdev->wiphy.wowlan_config->nd_config);
131         kfree(rdev->wiphy.wowlan_config);
132 #endif
133 }
134 
135 extern struct workqueue_struct *cfg80211_wq;
136 extern struct list_head cfg80211_rdev_list;
137 extern int cfg80211_rdev_list_generation;
138 
139 struct cfg80211_internal_bss {
140         struct list_head list;
141         struct list_head hidden_list;
142         struct rb_node rbn;
143         u64 ts_boottime;
144         unsigned long ts;
145         unsigned long refcount;
146         atomic_t hold;
147 
148         /* time at the start of the reception of the first octet of the
149          * timestamp field of the last beacon/probe received for this BSS.
150          * The time is the TSF of the BSS specified by %parent_bssid.
151          */
152         u64 parent_tsf;
153 
154         /* the BSS according to which %parent_tsf is set. This is set to
155          * the BSS that the interface that requested the scan was connected to
156          * when the beacon/probe was received.
157          */
158         u8 parent_bssid[ETH_ALEN] __aligned(2);
159 
160         /* must be last because of priv member */
161         struct cfg80211_bss pub;
162 };
163 
164 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
165 {
166         return container_of(pub, struct cfg80211_internal_bss, pub);
167 }
168 
169 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
170 {
171         atomic_inc(&bss->hold);
172 }
173 
174 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
175 {
176         int r = atomic_dec_return(&bss->hold);
177         WARN_ON(r < 0);
178 }
179 
180 
181 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
182 int get_wiphy_idx(struct wiphy *wiphy);
183 
184 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
185 
186 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
187                           struct net *net);
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_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
204 
205 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
206 {
207         ASSERT_RTNL();
208 
209         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
210                rdev->num_running_ifaces > 0;
211 }
212 
213 enum cfg80211_event_type {
214         EVENT_CONNECT_RESULT,
215         EVENT_ROAMED,
216         EVENT_DISCONNECTED,
217         EVENT_IBSS_JOINED,
218         EVENT_STOPPED,
219 };
220 
221 struct cfg80211_event {
222         struct list_head list;
223         enum cfg80211_event_type type;
224 
225         union {
226                 struct cfg80211_connect_resp_params cr;
227                 struct cfg80211_roam_info rm;
228                 struct {
229                         const u8 *ie;
230                         size_t ie_len;
231                         u16 reason;
232                         bool locally_generated;
233                 } dc;
234                 struct {
235                         u8 bssid[ETH_ALEN];
236                         struct ieee80211_channel *channel;
237                 } ij;
238         };
239 };
240 
241 struct cfg80211_cached_keys {
242         struct key_params params[CFG80211_MAX_WEP_KEYS];
243         u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
244         int def;
245 };
246 
247 enum cfg80211_chan_mode {
248         CHAN_MODE_UNDEFINED,
249         CHAN_MODE_SHARED,
250         CHAN_MODE_EXCLUSIVE,
251 };
252 
253 struct cfg80211_beacon_registration {
254         struct list_head list;
255         u32 nlportid;
256 };
257 
258 struct cfg80211_cqm_config {
259         u32 rssi_hyst;
260         s32 last_rssi_event_value;
261         int n_rssi_thresholds;
262         s32 rssi_thresholds[0];
263 };
264 
265 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
266 
267 /* free object */
268 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
269 
270 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
271                         char *newname);
272 
273 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
274 
275 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
276 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
277                       unsigned long age_secs);
278 
279 /* IBSS */
280 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
281                        struct net_device *dev,
282                        struct cfg80211_ibss_params *params,
283                        struct cfg80211_cached_keys *connkeys);
284 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
285 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
286                           struct net_device *dev, bool nowext);
287 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
288                         struct net_device *dev, bool nowext);
289 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
290                             struct ieee80211_channel *channel);
291 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
292                             struct wireless_dev *wdev);
293 
294 /* mesh */
295 extern const struct mesh_config default_mesh_config;
296 extern const struct mesh_setup default_mesh_setup;
297 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
298                          struct net_device *dev,
299                          struct mesh_setup *setup,
300                          const struct mesh_config *conf);
301 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
302                        struct net_device *dev,
303                        struct mesh_setup *setup,
304                        const struct mesh_config *conf);
305 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
306                           struct net_device *dev);
307 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
308                         struct net_device *dev);
309 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
310                               struct wireless_dev *wdev,
311                               struct cfg80211_chan_def *chandef);
312 
313 /* OCB */
314 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
315                         struct net_device *dev,
316                         struct ocb_setup *setup);
317 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
318                       struct net_device *dev,
319                       struct ocb_setup *setup);
320 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
321                          struct net_device *dev);
322 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
323                        struct net_device *dev);
324 
325 /* AP */
326 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
327                        struct net_device *dev, bool notify);
328 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
329                      struct net_device *dev, bool notify);
330 
331 /* MLME */
332 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
333                        struct net_device *dev,
334                        struct ieee80211_channel *chan,
335                        enum nl80211_auth_type auth_type,
336                        const u8 *bssid,
337                        const u8 *ssid, int ssid_len,
338                        const u8 *ie, int ie_len,
339                        const u8 *key, int key_len, int key_idx,
340                        const u8 *auth_data, int auth_data_len);
341 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
342                         struct net_device *dev,
343                         struct ieee80211_channel *chan,
344                         const u8 *bssid,
345                         const u8 *ssid, int ssid_len,
346                         struct cfg80211_assoc_request *req);
347 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
348                          struct net_device *dev, const u8 *bssid,
349                          const u8 *ie, int ie_len, u16 reason,
350                          bool local_state_change);
351 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
352                            struct net_device *dev, const u8 *bssid,
353                            const u8 *ie, int ie_len, u16 reason,
354                            bool local_state_change);
355 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
356                         struct net_device *dev);
357 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
358                                 u16 frame_type, const u8 *match_data,
359                                 int match_len);
360 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
361 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
362 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
363 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
364                           struct wireless_dev *wdev,
365                           struct cfg80211_mgmt_tx_params *params,
366                           u64 *cookie);
367 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
368                                const struct ieee80211_ht_cap *ht_capa_mask);
369 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
370                                 const struct ieee80211_vht_cap *vht_capa_mask);
371 
372 /* SME events */
373 int cfg80211_connect(struct cfg80211_registered_device *rdev,
374                      struct net_device *dev,
375                      struct cfg80211_connect_params *connect,
376                      struct cfg80211_cached_keys *connkeys,
377                      const u8 *prev_bssid);
378 void __cfg80211_connect_result(struct net_device *dev,
379                                struct cfg80211_connect_resp_params *params,
380                                bool wextev);
381 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
382                              size_t ie_len, u16 reason, bool from_ap);
383 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
384                         struct net_device *dev, u16 reason,
385                         bool wextev);
386 void __cfg80211_roamed(struct wireless_dev *wdev,
387                        struct cfg80211_roam_info *info);
388 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
389                               struct wireless_dev *wdev);
390 void cfg80211_autodisconnect_wk(struct work_struct *work);
391 
392 /* SME implementation */
393 void cfg80211_conn_work(struct work_struct *work);
394 void cfg80211_sme_scan_done(struct net_device *dev);
395 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
396 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
397 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
398 void cfg80211_sme_deauth(struct wireless_dev *wdev);
399 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
400 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
401 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
402 
403 /* internal helpers */
404 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
405 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
406                                    struct key_params *params, int key_idx,
407                                    bool pairwise, const u8 *mac_addr);
408 void __cfg80211_scan_done(struct work_struct *wk);
409 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
410                            bool send_message);
411 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
412                                  struct cfg80211_sched_scan_request *req);
413 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
414                                      bool want_multi);
415 void cfg80211_sched_scan_results_wk(struct work_struct *work);
416 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
417                                  struct cfg80211_sched_scan_request *req,
418                                  bool driver_initiated);
419 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
420                                u64 reqid, bool driver_initiated);
421 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
422 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
423                           struct net_device *dev, enum nl80211_iftype ntype,
424                           struct vif_params *params);
425 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
426 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
427 
428 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
429                                 u32 center_freq_khz, u32 bw_khz);
430 
431 /**
432  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
433  * @wiphy: the wiphy to validate against
434  * @chandef: the channel definition to check
435  *
436  * Checks if chandef is usable and we can/need start CAC on such channel.
437  *
438  * Return: Return true if all channels available and at least
439  *         one channel require CAC (NL80211_DFS_USABLE)
440  */
441 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
442                                  const struct cfg80211_chan_def *chandef);
443 
444 void cfg80211_set_dfs_state(struct wiphy *wiphy,
445                             const struct cfg80211_chan_def *chandef,
446                             enum nl80211_dfs_state dfs_state);
447 
448 void cfg80211_dfs_channels_update_work(struct work_struct *work);
449 
450 unsigned int
451 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
452                               const struct cfg80211_chan_def *chandef);
453 
454 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
455 
456 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
457                                   struct ieee80211_channel *chan);
458 
459 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
460 
461 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
462                           struct ieee80211_channel *chan);
463 
464 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
465 {
466         unsigned long end = jiffies;
467 
468         if (end >= start)
469                 return jiffies_to_msecs(end - start);
470 
471         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
472 }
473 
474 void
475 cfg80211_get_chan_state(struct wireless_dev *wdev,
476                         struct ieee80211_channel **chan,
477                         enum cfg80211_chan_mode *chanmode,
478                         u8 *radar_detect);
479 
480 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
481                                  struct cfg80211_chan_def *chandef);
482 
483 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
484                            const u8 *rates, unsigned int n_rates,
485                            u32 *mask);
486 
487 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
488                                  enum nl80211_iftype iftype, u32 beacon_int);
489 
490 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
491                                enum nl80211_iftype iftype, int num);
492 
493 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
494                       struct wireless_dev *wdev);
495 void cfg80211_leave(struct cfg80211_registered_device *rdev,
496                     struct wireless_dev *wdev);
497 
498 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
499                               struct wireless_dev *wdev);
500 
501 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
502                        struct wireless_dev *wdev);
503 
504 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
505 
506 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
507 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
508 #else
509 /*
510  * Trick to enable using it as a condition,
511  * and also not give a warning when it's
512  * not used that way.
513  */
514 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
515 #endif
516 
517 void cfg80211_cqm_config_free(struct wireless_dev *wdev);
518 
519 #endif /* __NET_WIRELESS_CORE_H */
520 

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