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;
61 struct list_head bss_list;
62 struct rb_root bss_tree;
64 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
65 struct cfg80211_sched_scan_request *sched_scan_req;
66 unsigned long suspend_at;
67 struct work_struct scan_done_wk;
68 struct work_struct sched_scan_results_wk;
70 struct mutex sched_scan_mtx;
72 #ifdef CONFIG_NL80211_TESTMODE
73 struct genl_info *testmode_info;
76 struct work_struct conn_work;
77 struct work_struct event_work;
79 struct cfg80211_wowlan *wowlan;
81 /* must be last because of the way we do wiphy_priv(),
82 * and it should at least be aligned to NETDEV_ALIGN */
83 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
87 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
90 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
93 /* Note 0 is valid, hence phy0 */
95 bool wiphy_idx_valid(int wiphy_idx)
97 return wiphy_idx >= 0;
101 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
107 for (i = 0; i < rdev->wowlan->n_patterns; i++)
108 kfree(rdev->wowlan->patterns[i].mask);
109 kfree(rdev->wowlan->patterns);
113 extern struct workqueue_struct *cfg80211_wq;
114 extern struct mutex cfg80211_mutex;
115 extern struct list_head cfg80211_rdev_list;
116 extern int cfg80211_rdev_list_generation;
118 static inline void assert_cfg80211_lock(void)
120 lockdep_assert_held(&cfg80211_mutex);
124 * You can use this to mark a wiphy_idx as not having an associated wiphy.
125 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
127 #define WIPHY_IDX_STALE -1
129 struct cfg80211_internal_bss {
130 struct list_head list;
135 bool beacon_ies_allocated;
136 bool proberesp_ies_allocated;
138 /* must be last because of priv member */
139 struct cfg80211_bss pub;
142 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
144 return container_of(pub, struct cfg80211_internal_bss, pub);
147 static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss)
152 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
154 atomic_inc(&bss->hold);
157 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
159 int r = atomic_dec_return(&bss->hold);
164 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
165 int get_wiphy_idx(struct wiphy *wiphy);
167 struct cfg80211_registered_device *
168 __cfg80211_rdev_from_info(struct genl_info *info);
171 * This function returns a pointer to the driver
172 * that the genl_info item that is passed refers to.
173 * If successful, it returns non-NULL and also locks
174 * the driver's mutex!
176 * This means that you need to call cfg80211_unlock_rdev()
177 * before being allowed to acquire &cfg80211_mutex!
179 * This is necessary because we need to lock the global
180 * mutex to get an item off the list safely, and then
181 * we lock the rdev mutex so it doesn't go away under us.
183 * We don't want to keep cfg80211_mutex locked
184 * for all the time in order to allow requests on
185 * other interfaces to go through at the same time.
187 * The result of this can be a PTR_ERR and hence must
188 * be checked with IS_ERR() for errors.
190 extern struct cfg80211_registered_device *
191 cfg80211_get_dev_from_info(struct genl_info *info);
193 /* requires cfg80211_rdev_mutex to be held! */
194 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
196 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */
197 extern struct cfg80211_registered_device *
198 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
200 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
203 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
205 mutex_lock(&rdev->mtx);
208 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
210 BUG_ON(IS_ERR(rdev) || !rdev);
211 mutex_unlock(&rdev->mtx);
214 static inline void wdev_lock(struct wireless_dev *wdev)
217 mutex_lock(&wdev->mtx);
218 __acquire(wdev->mtx);
221 static inline void wdev_unlock(struct wireless_dev *wdev)
224 __release(wdev->mtx);
225 mutex_unlock(&wdev->mtx);
228 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
229 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
231 enum cfg80211_event_type {
232 EVENT_CONNECT_RESULT,
238 struct cfg80211_event {
239 struct list_head list;
240 enum cfg80211_event_type type;
252 struct ieee80211_channel *channel;
270 struct cfg80211_cached_keys {
271 struct key_params params[6];
272 u8 data[6][WLAN_MAX_KEY_LEN];
278 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
280 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
283 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
285 void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
286 void cfg80211_bss_age(struct cfg80211_registered_device *dev,
287 unsigned long age_secs);
290 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
291 struct net_device *dev,
292 struct cfg80211_ibss_params *params,
293 struct cfg80211_cached_keys *connkeys);
294 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
295 struct net_device *dev,
296 struct cfg80211_ibss_params *params,
297 struct cfg80211_cached_keys *connkeys);
298 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
299 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
300 struct net_device *dev, bool nowext);
301 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
302 struct net_device *dev, bool nowext);
303 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
304 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
305 struct wireless_dev *wdev);
308 extern const struct mesh_config default_mesh_config;
309 extern const struct mesh_setup default_mesh_setup;
310 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
311 struct net_device *dev,
312 const struct mesh_setup *setup,
313 const struct mesh_config *conf);
314 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
315 struct net_device *dev,
316 const struct mesh_setup *setup,
317 const struct mesh_config *conf);
318 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
319 struct net_device *dev);
322 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
323 struct net_device *dev,
324 struct ieee80211_channel *chan,
325 enum nl80211_auth_type auth_type,
327 const u8 *ssid, int ssid_len,
328 const u8 *ie, int ie_len,
329 const u8 *key, int key_len, int key_idx,
330 bool local_state_change);
331 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
332 struct net_device *dev, struct ieee80211_channel *chan,
333 enum nl80211_auth_type auth_type, const u8 *bssid,
334 const u8 *ssid, int ssid_len,
335 const u8 *ie, int ie_len,
336 const u8 *key, int key_len, int key_idx,
337 bool local_state_change);
338 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
339 struct net_device *dev,
340 struct ieee80211_channel *chan,
341 const u8 *bssid, const u8 *prev_bssid,
342 const u8 *ssid, int ssid_len,
343 const u8 *ie, int ie_len, bool use_mfp,
344 struct cfg80211_crypto_settings *crypt,
345 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
346 struct ieee80211_ht_cap *ht_capa_mask);
347 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
348 struct net_device *dev, struct ieee80211_channel *chan,
349 const u8 *bssid, const u8 *prev_bssid,
350 const u8 *ssid, int ssid_len,
351 const u8 *ie, int ie_len, bool use_mfp,
352 struct cfg80211_crypto_settings *crypt,
353 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
354 struct ieee80211_ht_cap *ht_capa_mask);
355 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
356 struct net_device *dev, const u8 *bssid,
357 const u8 *ie, int ie_len, u16 reason,
358 bool local_state_change);
359 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
360 struct net_device *dev, const u8 *bssid,
361 const u8 *ie, int ie_len, u16 reason,
362 bool local_state_change);
363 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
364 struct net_device *dev, const u8 *bssid,
365 const u8 *ie, int ie_len, u16 reason,
366 bool local_state_change);
367 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
368 struct net_device *dev);
369 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
370 const u8 *req_ie, size_t req_ie_len,
371 const u8 *resp_ie, size_t resp_ie_len,
372 u16 status, bool wextev,
373 struct cfg80211_bss *bss);
374 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
375 u16 frame_type, const u8 *match_data,
377 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
378 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
379 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
380 struct net_device *dev,
381 struct ieee80211_channel *chan, bool offchan,
382 enum nl80211_channel_type channel_type,
383 bool channel_type_valid, unsigned int wait,
384 const u8 *buf, size_t len, bool no_cck,
385 bool dont_wait_for_ack, u64 *cookie);
386 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
387 const struct ieee80211_ht_cap *ht_capa_mask);
390 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
391 struct net_device *dev,
392 struct cfg80211_connect_params *connect,
393 struct cfg80211_cached_keys *connkeys,
394 const u8 *prev_bssid);
395 int cfg80211_connect(struct cfg80211_registered_device *rdev,
396 struct net_device *dev,
397 struct cfg80211_connect_params *connect,
398 struct cfg80211_cached_keys *connkeys);
399 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
400 struct net_device *dev, u16 reason,
402 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
403 struct net_device *dev, u16 reason,
405 void __cfg80211_roamed(struct wireless_dev *wdev,
406 struct ieee80211_channel *channel,
408 const u8 *req_ie, size_t req_ie_len,
409 const u8 *resp_ie, size_t resp_ie_len);
410 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
411 struct wireless_dev *wdev);
413 void cfg80211_conn_work(struct work_struct *work);
414 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
415 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
417 /* internal helpers */
418 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
419 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
420 struct key_params *params, int key_idx,
421 bool pairwise, const u8 *mac_addr);
422 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
423 size_t ie_len, u16 reason, bool from_ap);
424 void cfg80211_sme_scan_done(struct net_device *dev);
425 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
426 void cfg80211_sme_disassoc(struct net_device *dev, int idx);
427 void __cfg80211_scan_done(struct work_struct *wk);
428 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
429 void __cfg80211_sched_scan_results(struct work_struct *wk);
430 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
431 bool driver_initiated);
432 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
433 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
434 struct net_device *dev, enum nl80211_iftype ntype,
435 u32 *flags, struct vif_params *params);
436 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
438 int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
439 struct wireless_dev *wdev,
440 enum nl80211_iftype iftype);
443 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
444 enum nl80211_iftype iftype)
446 return cfg80211_can_change_interface(rdev, NULL, iftype);
449 struct ieee80211_channel *
450 rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
451 int freq, enum nl80211_channel_type channel_type);
452 int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
453 struct wireless_dev *wdev, int freq,
454 enum nl80211_channel_type channel_type);
456 u16 cfg80211_calculate_bitrate(struct rate_info *rate);
458 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
459 const u8 *rates, unsigned int n_rates,
462 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
465 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
466 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
469 * Trick to enable using it as a condition,
470 * and also not give a warning when it's
473 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
476 #endif /* __NET_WIRELESS_CORE_H */