core.h 15.6 KB
Newer Older
1
2
3
/*
 * Wireless configuration interface internals.
 *
4
 * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
5
6
7
8
9
10
 */
#ifndef __NET_WIRELESS_CORE_H
#define __NET_WIRELESS_CORE_H
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/netdevice.h>
11
12
#include <linux/kref.h>
#include <linux/rbtree.h>
13
#include <linux/debugfs.h>
Johannes Berg's avatar
Johannes Berg committed
14
15
#include <linux/rfkill.h>
#include <linux/workqueue.h>
16
#include <linux/rtnetlink.h>
17
18
#include <net/genetlink.h>
#include <net/cfg80211.h>
19
#include "reg.h"
20
21

struct cfg80211_registered_device {
22
	const struct cfg80211_ops *ops;
23
24
25
26
27
28
29
	struct list_head list;
	/* we hold this mutex during any call so that
	 * we cannot do multiple calls at once, and also
	 * to avoid the deregister call to proceed while
	 * any call is in progress */
	struct mutex mtx;

Johannes Berg's avatar
Johannes Berg committed
30
31
32
33
34
	/* rfkill support */
	struct rfkill_ops rfkill_ops;
	struct rfkill *rfkill;
	struct work_struct rfkill_sync;

35
36
37
38
39
40
41
42
43
44
45
46
	/* ISO / IEC 3166 alpha2 for which this device is receiving
	 * country IEs on, this can help disregard country IEs from APs
	 * on the same alpha2 quickly. The alpha2 may differ from
	 * cfg80211_regdomain's alpha2 when an intersection has occurred.
	 * If the AP is reconfigured this can also be used to tell us if
	 * the country on the country IE changed. */
	char country_ie_alpha2[2];

	/* If a Country IE has been received this tells us the environment
	 * which its telling us its in. This defaults to ENVIRON_ANY */
	enum environment_cap env;

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
54
	struct list_head wdev_list;
	int devlist_generation, wdev_id;
55
56
	int opencount; /* also protected by devlist_mtx */
	wait_queue_head_t dev_wait;
57

58
59
	u32 ap_beacons_nlpid;

60
	/* protected by RTNL only */
61
62
63
	int num_running_ifaces;
	int num_running_monitor_ifaces;

64
65
66
67
68
69
	/* BSSes/scanning */
	spinlock_t bss_lock;
	struct list_head bss_list;
	struct rb_root bss_tree;
	u32 bss_generation;
	struct cfg80211_scan_request *scan_req; /* protected by RTNL */
70
	struct cfg80211_sched_scan_request *sched_scan_req;
71
	unsigned long suspend_at;
Johannes Berg's avatar
Johannes Berg committed
72
	struct work_struct scan_done_wk;
73
	struct work_struct sched_scan_results_wk;
74

75
76
	struct mutex sched_scan_mtx;

77
78
79
80
#ifdef CONFIG_NL80211_TESTMODE
	struct genl_info *testmode_info;
#endif

81
	struct work_struct conn_work;
Johannes Berg's avatar
Johannes Berg committed
82
	struct work_struct event_work;
83

84
85
	struct cfg80211_wowlan *wowlan;

86
87
88
89
90
91
92
93
94
95
96
97
	/* must be last because of the way we do wiphy_priv(),
	 * and it should at least be aligned to NETDEV_ALIGN */
	struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
};

static inline
struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
{
	BUG_ON(!wiphy);
	return container_of(wiphy, struct cfg80211_registered_device, wiphy);
}

98
99
100
101
/* Note 0 is valid, hence phy0 */
static inline
bool wiphy_idx_valid(int wiphy_idx)
{
Eric Dumazet's avatar
Eric Dumazet committed
102
	return wiphy_idx >= 0;
103
104
}

105
106
107
108
109
110
111
112
113
114
115
116
static inline void
cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
{
	int i;

	if (!rdev->wowlan)
		return;
	for (i = 0; i < rdev->wowlan->n_patterns; i++)
		kfree(rdev->wowlan->patterns[i].mask);
	kfree(rdev->wowlan->patterns);
	kfree(rdev->wowlan);
}
117
118

extern struct workqueue_struct *cfg80211_wq;
119
extern struct mutex cfg80211_mutex;
120
extern struct list_head cfg80211_rdev_list;
121
extern int cfg80211_rdev_list_generation;
122

123
124
125
126
static inline void assert_cfg80211_lock(void)
{
	lockdep_assert_held(&cfg80211_mutex);
}
127

128
129
/*
 * You can use this to mark a wiphy_idx as not having an associated wiphy.
130
 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
131
132
133
 */
#define WIPHY_IDX_STALE -1

134
135
136
137
138
struct cfg80211_internal_bss {
	struct list_head list;
	struct rb_node rbn;
	unsigned long ts;
	struct kref ref;
Johannes Berg's avatar
Johannes Berg committed
139
	atomic_t hold;
140
141
	bool beacon_ies_allocated;
	bool proberesp_ies_allocated;
Kalle Valo's avatar
Kalle Valo committed
142

143
144
145
146
	/* must be last because of priv member */
	struct cfg80211_bss pub;
};

Johannes Berg's avatar
Johannes Berg committed
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
{
	return container_of(pub, struct cfg80211_internal_bss, pub);
}

static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
{
	atomic_inc(&bss->hold);
}

static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
{
	int r = atomic_dec_return(&bss->hold);
	WARN_ON(r < 0);
}


164
struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
165
166
int get_wiphy_idx(struct wiphy *wiphy);

167
/* requires cfg80211_rdev_mutex to be held! */
168
169
struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);

170
171
/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
extern struct cfg80211_registered_device *
172
173
174
175
cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);

int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
			  struct net *net);
176

177
static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
Johannes Berg's avatar
Johannes Berg committed
178
{
179
	mutex_lock(&rdev->mtx);
Johannes Berg's avatar
Johannes Berg committed
180
181
}

182
static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
183
{
184
185
	BUG_ON(IS_ERR(rdev) || !rdev);
	mutex_unlock(&rdev->mtx);
186
}
187

Johannes Berg's avatar
Johannes Berg committed
188
189
190
191
192
193
194
195
196
197
198
199
200
201
static inline void wdev_lock(struct wireless_dev *wdev)
	__acquires(wdev)
{
	mutex_lock(&wdev->mtx);
	__acquire(wdev->mtx);
}

static inline void wdev_unlock(struct wireless_dev *wdev)
	__releases(wdev)
{
	__release(wdev->mtx);
	mutex_unlock(&wdev->mtx);
}

202
203
#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
Johannes Berg's avatar
Johannes Berg committed
204

205
206
static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
{
207
	ASSERT_RTNL();
208
209
210
211
212

	return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
	       rdev->num_running_ifaces > 0;
}

Johannes Berg's avatar
Johannes Berg committed
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
enum cfg80211_event_type {
	EVENT_CONNECT_RESULT,
	EVENT_ROAMED,
	EVENT_DISCONNECTED,
	EVENT_IBSS_JOINED,
};

struct cfg80211_event {
	struct list_head list;
	enum cfg80211_event_type type;

	union {
		struct {
			u8 bssid[ETH_ALEN];
			const u8 *req_ie;
			const u8 *resp_ie;
			size_t req_ie_len;
			size_t resp_ie_len;
			u16 status;
		} cr;
		struct {
			const u8 *req_ie;
			const u8 *resp_ie;
			size_t req_ie_len;
			size_t resp_ie_len;
238
			struct cfg80211_bss *bss;
Johannes Berg's avatar
Johannes Berg committed
239
240
241
242
243
244
245
246
247
248
249
250
		} rm;
		struct {
			const u8 *ie;
			size_t ie_len;
			u16 reason;
		} dc;
		struct {
			u8 bssid[ETH_ALEN];
		} ij;
	};
};

Johannes Berg's avatar
Johannes Berg committed
251
252
253
254
255
256
struct cfg80211_cached_keys {
	struct key_params params[6];
	u8 data[6][WLAN_MAX_KEY_LEN];
	int def, defmgmt;
};

257
258
259
260
261
262
enum cfg80211_chan_mode {
	CHAN_MODE_UNDEFINED,
	CHAN_MODE_SHARED,
	CHAN_MODE_EXCLUSIVE,
};

Johannes Berg's avatar
Johannes Berg committed
263

264
/* free object */
265
extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
266

267
extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
268
269
			       char *newname);

270
271
void ieee80211_set_bitrate_flags(struct wiphy *wiphy);

272
void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
273
274
void cfg80211_bss_age(struct cfg80211_registered_device *dev,
                      unsigned long age_secs);
275

Johannes Berg's avatar
Johannes Berg committed
276
/* IBSS */
Johannes Berg's avatar
Johannes Berg committed
277
278
int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
279
280
			 struct cfg80211_ibss_params *params,
			 struct cfg80211_cached_keys *connkeys);
Johannes Berg's avatar
Johannes Berg committed
281
282
int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
283
284
		       struct cfg80211_ibss_params *params,
		       struct cfg80211_cached_keys *connkeys);
285
void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
286
287
int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
288
int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
289
			struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
290
void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
Johannes Berg's avatar
Johannes Berg committed
291
292
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
			    struct wireless_dev *wdev);
Johannes Berg's avatar
Johannes Berg committed
293

294
295
/* mesh */
extern const struct mesh_config default_mesh_config;
296
extern const struct mesh_setup default_mesh_setup;
297
298
int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
299
			 struct mesh_setup *setup,
300
301
302
			 const struct mesh_config *conf);
int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
303
		       struct mesh_setup *setup,
304
305
306
		       const struct mesh_config *conf);
int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
			struct net_device *dev);
307
308
309
int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
			   struct wireless_dev *wdev, int freq,
			   enum nl80211_channel_type channel_type);
310

311
312
313
314
/* AP */
int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
		     struct net_device *dev);

Johannes Berg's avatar
Johannes Berg committed
315
/* MLME */
Johannes Berg's avatar
Johannes Berg committed
316
317
318
319
320
321
int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
			 struct ieee80211_channel *chan,
			 enum nl80211_auth_type auth_type,
			 const u8 *bssid,
			 const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
322
			 const u8 *ie, int ie_len,
323
			 const u8 *key, int key_len, int key_idx);
Johannes Berg's avatar
Johannes Berg committed
324
325
326
327
int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
		       struct net_device *dev, struct ieee80211_channel *chan,
		       enum nl80211_auth_type auth_type, const u8 *bssid,
		       const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
328
		       const u8 *ie, int ie_len,
329
		       const u8 *key, int key_len, int key_idx);
Johannes Berg's avatar
Johannes Berg committed
330
331
332
333
334
335
int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
			  struct net_device *dev,
			  struct ieee80211_channel *chan,
			  const u8 *bssid, const u8 *prev_bssid,
			  const u8 *ssid, int ssid_len,
			  const u8 *ie, int ie_len, bool use_mfp,
336
337
338
			  struct cfg80211_crypto_settings *crypt,
			  u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
			  struct ieee80211_ht_cap *ht_capa_mask);
Johannes Berg's avatar
Johannes Berg committed
339
340
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
			struct net_device *dev, struct ieee80211_channel *chan,
341
342
			const u8 *bssid, const u8 *prev_bssid,
			const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
343
			const u8 *ie, int ie_len, bool use_mfp,
344
345
346
			struct cfg80211_crypto_settings *crypt,
			u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
			struct ieee80211_ht_cap *ht_capa_mask);
Johannes Berg's avatar
Johannes Berg committed
347
348
int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
			   struct net_device *dev, const u8 *bssid,
349
350
			   const u8 *ie, int ie_len, u16 reason,
			   bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
351
352
int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
			 struct net_device *dev, const u8 *bssid,
353
354
			 const u8 *ie, int ie_len, u16 reason,
			 bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
355
356
int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
			   struct net_device *dev, const u8 *bssid,
357
358
			   const u8 *ie, int ie_len, u16 reason,
			   bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
359
360
void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
			struct net_device *dev);
Johannes Berg's avatar
Johannes Berg committed
361
362
363
void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
			       const u8 *req_ie, size_t req_ie_len,
			       const u8 *resp_ie, size_t resp_ie_len,
364
365
			       u16 status, bool wextev,
			       struct cfg80211_bss *bss);
366
367
368
369
370
371
int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
				u16 frame_type, const u8 *match_data,
				int match_len);
void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
372
			  struct wireless_dev *wdev,
373
			  struct ieee80211_channel *chan, bool offchan,
374
			  enum nl80211_channel_type channel_type,
375
			  bool channel_type_valid, unsigned int wait,
376
			  const u8 *buf, size_t len, bool no_cck,
377
			  bool dont_wait_for_ack, u64 *cookie);
378
379
void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
			       const struct ieee80211_ht_cap *ht_capa_mask);
Johannes Berg's avatar
Johannes Berg committed
380

381
/* SME */
Johannes Berg's avatar
Johannes Berg committed
382
383
int __cfg80211_connect(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
384
		       struct cfg80211_connect_params *connect,
385
386
		       struct cfg80211_cached_keys *connkeys,
		       const u8 *prev_bssid);
387
388
int cfg80211_connect(struct cfg80211_registered_device *rdev,
		     struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
389
390
		     struct cfg80211_connect_params *connect,
		     struct cfg80211_cached_keys *connkeys);
Johannes Berg's avatar
Johannes Berg committed
391
392
393
int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, u16 reason,
			  bool wextev);
394
int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
395
396
			struct net_device *dev, u16 reason,
			bool wextev);
397
void __cfg80211_roamed(struct wireless_dev *wdev,
398
		       struct cfg80211_bss *bss,
Johannes Berg's avatar
Johannes Berg committed
399
400
		       const u8 *req_ie, size_t req_ie_len,
		       const u8 *resp_ie, size_t resp_ie_len);
Johannes Berg's avatar
Johannes Berg committed
401
402
int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
			      struct wireless_dev *wdev);
403

404
void cfg80211_conn_work(struct work_struct *work);
405
void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
406
bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
407

408
/* internal helpers */
409
bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
Johannes Berg's avatar
Johannes Berg committed
410
411
int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
				   struct key_params *params, int key_idx,
412
				   bool pairwise, const u8 *mac_addr);
Johannes Berg's avatar
Johannes Berg committed
413
void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
414
415
416
			     size_t ie_len, u16 reason, bool from_ap);
void cfg80211_sme_scan_done(struct net_device *dev);
void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
417
418
void cfg80211_sme_disassoc(struct net_device *dev,
			   struct cfg80211_internal_bss *bss);
Johannes Berg's avatar
Johannes Berg committed
419
void __cfg80211_scan_done(struct work_struct *wk);
420
void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
421
422
423
void __cfg80211_sched_scan_results(struct work_struct *wk);
int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
			       bool driver_initiated);
Johannes Berg's avatar
Johannes Berg committed
424
void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
425
426
427
428
int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, enum nl80211_iftype ntype,
			  u32 *flags, struct vif_params *params);
void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
429
void cfg80211_process_wdev_events(struct wireless_dev *wdev);
430

431
432
433
434
435
436
437
438
439
440
441
442
443
444
int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
				 struct wireless_dev *wdev,
				 enum nl80211_iftype iftype,
				 struct ieee80211_channel *chan,
				 enum cfg80211_chan_mode chanmode);

static inline int
cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
			      struct wireless_dev *wdev,
			      enum nl80211_iftype iftype)
{
	return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
					    CHAN_MODE_UNDEFINED);
}
445
446
447
448
449
450
451
452

static inline int
cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
			   enum nl80211_iftype iftype)
{
	return cfg80211_can_change_interface(rdev, NULL, iftype);
}

453
454
455
456
457
458
459
460
461
462
static inline int
cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
		      struct wireless_dev *wdev,
		      struct ieee80211_channel *chan,
		      enum cfg80211_chan_mode chanmode)
{
	return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
					    chan, chanmode);
}

463
void
464
cfg80211_get_chan_state(struct wireless_dev *wdev,
465
466
467
		        struct ieee80211_channel **chan,
		        enum cfg80211_chan_mode *chanmode);

468
469
470
struct ieee80211_channel *
rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
		  int freq, enum nl80211_channel_type channel_type);
471
472
int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
				 int freq, enum nl80211_channel_type chantype);
473

474
475
476
477
int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
			   const u8 *rates, unsigned int n_rates,
			   u32 *mask);

478
479
480
int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
				 u32 beacon_int);

481
482
483
void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
			       enum nl80211_iftype iftype, int num);

484
485
#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10

486
487
488
489
490
491
492
493
494
495
496
#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
#define CFG80211_DEV_WARN_ON(cond)	WARN_ON(cond)
#else
/*
 * Trick to enable using it as a condition,
 * and also not give a warning when it's
 * not used that way.
 */
#define CFG80211_DEV_WARN_ON(cond)	({bool __r = (cond); __r; })
#endif

497
#endif /* __NET_WIRELESS_CORE_H */