2 * Wireless configuration interface internals.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
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 <net/genetlink.h>
17 #include <net/cfg80211.h>
20 struct cfg80211_registered_device {
21 const struct cfg80211_ops *ops;
22 struct list_head list;
23 /* we hold this mutex during any call so that
24 * we cannot do multiple calls at once, and also
25 * to avoid the deregister call to proceed while
26 * any call is in progress */
30 struct rfkill_ops rfkill_ops;
31 struct rfkill *rfkill;
32 struct work_struct rfkill_sync;
34 /* ISO / IEC 3166 alpha2 for which this device is receiving
35 * country IEs on, this can help disregard country IEs from APs
36 * on the same alpha2 quickly. The alpha2 may differ from
37 * cfg80211_regdomain's alpha2 when an intersection has occurred.
38 * If the AP is reconfigured this can also be used to tell us if
39 * the country on the country IE changed. */
40 char country_ie_alpha2[2];
42 /* If a Country IE has been received this tells us the environment
43 * which its telling us its in. This defaults to ENVIRON_ANY */
44 enum environment_cap env;
46 /* wiphy index, internal only */
49 /* associate netdev list */
50 struct mutex devlist_mtx;
51 /* protected by devlist_mtx or RCU */
52 struct list_head netdev_list;
53 int devlist_generation;
54 int opencount; /* also protected by devlist_mtx */
55 wait_queue_head_t dev_wait;
59 struct list_head bss_list;
60 struct rb_root bss_tree;
62 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
63 struct cfg80211_sched_scan_request *sched_scan_req;
64 unsigned long suspend_at;
65 struct work_struct scan_done_wk;
66 struct work_struct sched_scan_results_wk;
68 #ifdef CONFIG_NL80211_TESTMODE
69 struct genl_info *testmode_info;
72 struct work_struct conn_work;
73 struct work_struct event_work;
75 struct cfg80211_wowlan *wowlan;
77 /* must be last because of the way we do wiphy_priv(),
78 * and it should at least be aligned to NETDEV_ALIGN */
79 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
83 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
86 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
89 /* Note 0 is valid, hence phy0 */
91 bool wiphy_idx_valid(int wiphy_idx)
93 return wiphy_idx >= 0;
97 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
103 for (i = 0; i < rdev->wowlan->n_patterns; i++)
104 kfree(rdev->wowlan->patterns[i].mask);
105 kfree(rdev->wowlan->patterns);
109 extern struct workqueue_struct *cfg80211_wq;
110 extern struct mutex cfg80211_mutex;
111 extern struct list_head cfg80211_rdev_list;
112 extern int cfg80211_rdev_list_generation;
114 static inline void assert_cfg80211_lock(void)
116 lockdep_assert_held(&cfg80211_mutex);
120 * You can use this to mark a wiphy_idx as not having an associated wiphy.
121 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
123 #define WIPHY_IDX_STALE -1
125 struct cfg80211_internal_bss {
126 struct list_head list;
131 bool beacon_ies_allocated;
132 bool proberesp_ies_allocated;
134 /* must be last because of priv member */
135 struct cfg80211_bss pub;
138 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
140 return container_of(pub, struct cfg80211_internal_bss, pub);
143 static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss)
148 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
150 atomic_inc(&bss->hold);
153 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
155 int r = atomic_dec_return(&bss->hold);
160 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
161 int get_wiphy_idx(struct wiphy *wiphy);
163 struct cfg80211_registered_device *
164 __cfg80211_rdev_from_info(struct genl_info *info);
167 * This function returns a pointer to the driver
168 * that the genl_info item that is passed refers to.
169 * If successful, it returns non-NULL and also locks
170 * the driver's mutex!
172 * This means that you need to call cfg80211_unlock_rdev()
173 * before being allowed to acquire &cfg80211_mutex!
175 * This is necessary because we need to lock the global
176 * mutex to get an item off the list safely, and then
177 * we lock the rdev mutex so it doesn't go away under us.
179 * We don't want to keep cfg80211_mutex locked
180 * for all the time in order to allow requests on
181 * other interfaces to go through at the same time.
183 * The result of this can be a PTR_ERR and hence must
184 * be checked with IS_ERR() for errors.
186 extern struct cfg80211_registered_device *
187 cfg80211_get_dev_from_info(struct genl_info *info);
189 /* requires cfg80211_rdev_mutex to be held! */
190 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
192 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */
193 extern struct cfg80211_registered_device *
194 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
196 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
199 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
201 mutex_lock(&rdev->mtx);
204 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
206 BUG_ON(IS_ERR(rdev) || !rdev);
207 mutex_unlock(&rdev->mtx);
210 static inline void wdev_lock(struct wireless_dev *wdev)
213 mutex_lock(&wdev->mtx);
214 __acquire(wdev->mtx);
217 static inline void wdev_unlock(struct wireless_dev *wdev)
220 __release(wdev->mtx);
221 mutex_unlock(&wdev->mtx);
224 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
225 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
227 enum cfg80211_event_type {
228 EVENT_CONNECT_RESULT,
234 struct cfg80211_event {
235 struct list_head list;
236 enum cfg80211_event_type type;
265 struct cfg80211_cached_keys {
266 struct key_params params[6];
267 u8 data[6][WLAN_MAX_KEY_LEN];
273 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
275 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
278 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
279 void wiphy_update_regulatory(struct wiphy *wiphy,
280 enum nl80211_reg_initiator setby);
282 void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
283 void cfg80211_bss_age(struct cfg80211_registered_device *dev,
284 unsigned long age_secs);
287 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
288 struct net_device *dev,
289 struct cfg80211_ibss_params *params,
290 struct cfg80211_cached_keys *connkeys);
291 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
292 struct net_device *dev,
293 struct cfg80211_ibss_params *params,
294 struct cfg80211_cached_keys *connkeys);
295 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
296 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
297 struct net_device *dev, bool nowext);
298 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
299 struct net_device *dev, bool nowext);
300 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
301 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
302 struct wireless_dev *wdev);
305 extern const struct mesh_config default_mesh_config;
306 extern const struct mesh_setup default_mesh_setup;
307 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
308 struct net_device *dev,
309 const struct mesh_setup *setup,
310 const struct mesh_config *conf);
311 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
312 struct net_device *dev,
313 const struct mesh_setup *setup,
314 const struct mesh_config *conf);
315 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
316 struct net_device *dev);
319 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
320 struct net_device *dev,
321 struct ieee80211_channel *chan,
322 enum nl80211_auth_type auth_type,
324 const u8 *ssid, int ssid_len,
325 const u8 *ie, int ie_len,
326 const u8 *key, int key_len, int key_idx,
327 bool local_state_change);
328 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
329 struct net_device *dev, struct ieee80211_channel *chan,
330 enum nl80211_auth_type auth_type, const u8 *bssid,
331 const u8 *ssid, int ssid_len,
332 const u8 *ie, int ie_len,
333 const u8 *key, int key_len, int key_idx,
334 bool local_state_change);
335 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
336 struct net_device *dev,
337 struct ieee80211_channel *chan,
338 const u8 *bssid, const u8 *prev_bssid,
339 const u8 *ssid, int ssid_len,
340 const u8 *ie, int ie_len, bool use_mfp,
341 struct cfg80211_crypto_settings *crypt);
342 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
343 struct net_device *dev, struct ieee80211_channel *chan,
344 const u8 *bssid, const u8 *prev_bssid,
345 const u8 *ssid, int ssid_len,
346 const u8 *ie, int ie_len, bool use_mfp,
347 struct cfg80211_crypto_settings *crypt);
348 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
349 struct net_device *dev, const u8 *bssid,
350 const u8 *ie, int ie_len, u16 reason,
351 bool local_state_change);
352 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
353 struct net_device *dev, const u8 *bssid,
354 const u8 *ie, int ie_len, u16 reason,
355 bool local_state_change);
356 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
357 struct net_device *dev, const u8 *bssid,
358 const u8 *ie, int ie_len, u16 reason,
359 bool local_state_change);
360 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
361 struct net_device *dev);
362 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
363 const u8 *req_ie, size_t req_ie_len,
364 const u8 *resp_ie, size_t resp_ie_len,
365 u16 status, bool wextev,
366 struct cfg80211_bss *bss);
367 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
368 u16 frame_type, const u8 *match_data,
370 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
371 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
372 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
373 struct net_device *dev,
374 struct ieee80211_channel *chan, bool offchan,
375 enum nl80211_channel_type channel_type,
376 bool channel_type_valid, unsigned int wait,
377 const u8 *buf, size_t len, u64 *cookie);
380 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
381 struct net_device *dev,
382 struct cfg80211_connect_params *connect,
383 struct cfg80211_cached_keys *connkeys,
384 const u8 *prev_bssid);
385 int cfg80211_connect(struct cfg80211_registered_device *rdev,
386 struct net_device *dev,
387 struct cfg80211_connect_params *connect,
388 struct cfg80211_cached_keys *connkeys);
389 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
390 struct net_device *dev, u16 reason,
392 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
393 struct net_device *dev, u16 reason,
395 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
396 const u8 *req_ie, size_t req_ie_len,
397 const u8 *resp_ie, size_t resp_ie_len);
398 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
399 struct wireless_dev *wdev);
401 void cfg80211_conn_work(struct work_struct *work);
402 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
403 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
405 /* internal helpers */
406 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
407 struct key_params *params, int key_idx,
408 bool pairwise, const u8 *mac_addr);
409 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
410 size_t ie_len, u16 reason, bool from_ap);
411 void cfg80211_sme_scan_done(struct net_device *dev);
412 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
413 void cfg80211_sme_disassoc(struct net_device *dev, int idx);
414 void __cfg80211_scan_done(struct work_struct *wk);
415 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
416 void __cfg80211_sched_scan_results(struct work_struct *wk);
417 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
418 bool driver_initiated);
419 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
420 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
421 struct net_device *dev, enum nl80211_iftype ntype,
422 u32 *flags, struct vif_params *params);
423 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
425 int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
426 struct wireless_dev *wdev,
427 enum nl80211_iftype iftype);
430 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
431 enum nl80211_iftype iftype)
433 return cfg80211_can_change_interface(rdev, NULL, iftype);
436 struct ieee80211_channel *
437 rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
438 int freq, enum nl80211_channel_type channel_type);
439 int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
440 struct wireless_dev *wdev, int freq,
441 enum nl80211_channel_type channel_type);
443 u16 cfg80211_calculate_bitrate(struct rate_info *rate);
445 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
448 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
449 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
452 * Trick to enable using it as a condition,
453 * and also not give a warning when it's
456 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
459 #endif /* __NET_WIRELESS_CORE_H */