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 unsigned long suspend_at;
64 struct work_struct scan_done_wk;
66 #ifdef CONFIG_NL80211_TESTMODE
67 struct genl_info *testmode_info;
70 struct work_struct conn_work;
71 struct work_struct event_work;
73 /* must be last because of the way we do wiphy_priv(),
74 * and it should at least be aligned to NETDEV_ALIGN */
75 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
79 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
82 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
85 /* Note 0 is valid, hence phy0 */
87 bool wiphy_idx_valid(int wiphy_idx)
89 return (wiphy_idx >= 0);
93 extern struct workqueue_struct *cfg80211_wq;
94 extern struct mutex cfg80211_mutex;
95 extern struct list_head cfg80211_rdev_list;
96 extern int cfg80211_rdev_list_generation;
98 #define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex))
101 * You can use this to mark a wiphy_idx as not having an associated wiphy.
102 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
104 #define WIPHY_IDX_STALE -1
106 struct cfg80211_internal_bss {
107 struct list_head list;
112 bool beacon_ies_allocated;
113 bool proberesp_ies_allocated;
115 /* must be last because of priv member */
116 struct cfg80211_bss pub;
119 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
121 return container_of(pub, struct cfg80211_internal_bss, pub);
124 static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss)
129 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
131 atomic_inc(&bss->hold);
134 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
136 int r = atomic_dec_return(&bss->hold);
141 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
142 int get_wiphy_idx(struct wiphy *wiphy);
144 struct cfg80211_registered_device *
145 __cfg80211_rdev_from_info(struct genl_info *info);
148 * This function returns a pointer to the driver
149 * that the genl_info item that is passed refers to.
150 * If successful, it returns non-NULL and also locks
151 * the driver's mutex!
153 * This means that you need to call cfg80211_unlock_rdev()
154 * before being allowed to acquire &cfg80211_mutex!
156 * This is necessary because we need to lock the global
157 * mutex to get an item off the list safely, and then
158 * we lock the rdev mutex so it doesn't go away under us.
160 * We don't want to keep cfg80211_mutex locked
161 * for all the time in order to allow requests on
162 * other interfaces to go through at the same time.
164 * The result of this can be a PTR_ERR and hence must
165 * be checked with IS_ERR() for errors.
167 extern struct cfg80211_registered_device *
168 cfg80211_get_dev_from_info(struct genl_info *info);
170 /* requires cfg80211_rdev_mutex to be held! */
171 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
173 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */
174 extern struct cfg80211_registered_device *
175 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
177 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
180 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
182 mutex_lock(&rdev->mtx);
185 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
187 BUG_ON(IS_ERR(rdev) || !rdev);
188 mutex_unlock(&rdev->mtx);
191 static inline void wdev_lock(struct wireless_dev *wdev)
194 mutex_lock(&wdev->mtx);
195 __acquire(wdev->mtx);
198 static inline void wdev_unlock(struct wireless_dev *wdev)
201 __release(wdev->mtx);
202 mutex_unlock(&wdev->mtx);
205 #define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx));
206 #define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx));
208 enum cfg80211_event_type {
209 EVENT_CONNECT_RESULT,
215 struct cfg80211_event {
216 struct list_head list;
217 enum cfg80211_event_type type;
246 struct cfg80211_cached_keys {
247 struct key_params params[6];
248 u8 data[6][WLAN_MAX_KEY_LEN];
254 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
256 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
259 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
260 void wiphy_update_regulatory(struct wiphy *wiphy,
261 enum nl80211_reg_initiator setby);
263 void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
264 void cfg80211_bss_age(struct cfg80211_registered_device *dev,
265 unsigned long age_secs);
268 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
269 struct net_device *dev,
270 struct cfg80211_ibss_params *params,
271 struct cfg80211_cached_keys *connkeys);
272 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
273 struct net_device *dev,
274 struct cfg80211_ibss_params *params,
275 struct cfg80211_cached_keys *connkeys);
276 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
277 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
278 struct net_device *dev, bool nowext);
279 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
280 struct net_device *dev, bool nowext);
281 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
282 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
283 struct wireless_dev *wdev);
286 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
287 struct net_device *dev,
288 struct ieee80211_channel *chan,
289 enum nl80211_auth_type auth_type,
291 const u8 *ssid, int ssid_len,
292 const u8 *ie, int ie_len,
293 const u8 *key, int key_len, int key_idx,
294 bool local_state_change);
295 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
296 struct net_device *dev, struct ieee80211_channel *chan,
297 enum nl80211_auth_type auth_type, const u8 *bssid,
298 const u8 *ssid, int ssid_len,
299 const u8 *ie, int ie_len,
300 const u8 *key, int key_len, int key_idx,
301 bool local_state_change);
302 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
303 struct net_device *dev,
304 struct ieee80211_channel *chan,
305 const u8 *bssid, const u8 *prev_bssid,
306 const u8 *ssid, int ssid_len,
307 const u8 *ie, int ie_len, bool use_mfp,
308 struct cfg80211_crypto_settings *crypt);
309 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
310 struct net_device *dev, struct ieee80211_channel *chan,
311 const u8 *bssid, const u8 *prev_bssid,
312 const u8 *ssid, int ssid_len,
313 const u8 *ie, int ie_len, bool use_mfp,
314 struct cfg80211_crypto_settings *crypt);
315 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
316 struct net_device *dev, const u8 *bssid,
317 const u8 *ie, int ie_len, u16 reason,
318 bool local_state_change);
319 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
320 struct net_device *dev, const u8 *bssid,
321 const u8 *ie, int ie_len, u16 reason,
322 bool local_state_change);
323 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
324 struct net_device *dev, const u8 *bssid,
325 const u8 *ie, int ie_len, u16 reason,
326 bool local_state_change);
327 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
328 struct net_device *dev);
329 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
330 const u8 *req_ie, size_t req_ie_len,
331 const u8 *resp_ie, size_t resp_ie_len,
332 u16 status, bool wextev,
333 struct cfg80211_bss *bss);
334 int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid,
335 const u8 *match_data, int match_len);
336 void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid);
337 void cfg80211_mlme_purge_actions(struct wireless_dev *wdev);
338 int cfg80211_mlme_action(struct cfg80211_registered_device *rdev,
339 struct net_device *dev,
340 struct ieee80211_channel *chan,
341 enum nl80211_channel_type channel_type,
342 bool channel_type_valid,
343 const u8 *buf, size_t len, u64 *cookie);
346 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
347 struct net_device *dev,
348 struct cfg80211_connect_params *connect,
349 struct cfg80211_cached_keys *connkeys,
350 const u8 *prev_bssid);
351 int cfg80211_connect(struct cfg80211_registered_device *rdev,
352 struct net_device *dev,
353 struct cfg80211_connect_params *connect,
354 struct cfg80211_cached_keys *connkeys);
355 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
356 struct net_device *dev, u16 reason,
358 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
359 struct net_device *dev, u16 reason,
361 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
362 const u8 *req_ie, size_t req_ie_len,
363 const u8 *resp_ie, size_t resp_ie_len);
364 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
365 struct wireless_dev *wdev);
367 void cfg80211_conn_work(struct work_struct *work);
368 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
369 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
371 /* internal helpers */
372 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
373 struct key_params *params, int key_idx,
375 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
376 size_t ie_len, u16 reason, bool from_ap);
377 void cfg80211_sme_scan_done(struct net_device *dev);
378 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
379 void cfg80211_sme_disassoc(struct net_device *dev, int idx);
380 void __cfg80211_scan_done(struct work_struct *wk);
381 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
382 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
383 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
384 struct net_device *dev, enum nl80211_iftype ntype,
385 u32 *flags, struct vif_params *params);
386 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
388 struct ieee80211_channel *
389 rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
390 int freq, enum nl80211_channel_type channel_type);
391 int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
392 struct wireless_dev *wdev, int freq,
393 enum nl80211_channel_type channel_type);
395 u16 cfg80211_calculate_bitrate(struct rate_info *rate);
397 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
398 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
401 * Trick to enable using it as a condition,
402 * and also not give a warning when it's
405 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
408 #endif /* __NET_WIRELESS_CORE_H */