core.h 14.8 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 17
#include <net/genetlink.h>
#include <net/cfg80211.h>
18
#include "reg.h"
19 20

struct cfg80211_registered_device {
21
	const struct cfg80211_ops *ops;
22 23 24 25 26 27 28
	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
29 30 31 32 33
	/* rfkill support */
	struct rfkill_ops rfkill_ops;
	struct rfkill *rfkill;
	struct work_struct rfkill_sync;

34 35 36 37 38 39 40 41 42 43 44 45
	/* 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;

46
	/* wiphy index, internal only */
47
	int wiphy_idx;
48 49 50

	/* associate netdev list */
	struct mutex devlist_mtx;
51
	/* protected by devlist_mtx or RCU */
52
	struct list_head netdev_list;
53
	int devlist_generation;
54 55
	int opencount; /* also protected by devlist_mtx */
	wait_queue_head_t dev_wait;
56

57 58
	u32 ap_beacons_nlpid;

59 60 61 62 63 64
	/* 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 */
65
	struct cfg80211_sched_scan_request *sched_scan_req;
66
	unsigned long suspend_at;
Johannes Berg's avatar
Johannes Berg committed
67
	struct work_struct scan_done_wk;
68
	struct work_struct sched_scan_results_wk;
69

70 71
	struct mutex sched_scan_mtx;

72 73 74 75
#ifdef CONFIG_NL80211_TESTMODE
	struct genl_info *testmode_info;
#endif

76
	struct work_struct conn_work;
Johannes Berg's avatar
Johannes Berg committed
77
	struct work_struct event_work;
78

79 80
	struct cfg80211_wowlan *wowlan;

81 82 83 84 85 86 87 88 89 90 91 92
	/* 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);
}

93 94 95 96
/* Note 0 is valid, hence phy0 */
static inline
bool wiphy_idx_valid(int wiphy_idx)
{
Eric Dumazet's avatar
Eric Dumazet committed
97
	return wiphy_idx >= 0;
98 99
}

100 101 102 103 104 105 106 107 108 109 110 111
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);
}
112 113

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;
117

118 119 120 121
static inline void assert_cfg80211_lock(void)
{
	lockdep_assert_held(&cfg80211_mutex);
}
122

123 124
/*
 * 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
126 127 128
 */
#define WIPHY_IDX_STALE -1

129 130 131 132 133
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
134
	atomic_t hold;
135 136
	bool beacon_ies_allocated;
	bool proberesp_ies_allocated;
Kalle Valo's avatar
Kalle Valo committed
137

138 139 140 141
	/* must be last because of priv member */
	struct cfg80211_bss pub;
};

Johannes Berg's avatar
Johannes Berg committed
142 143 144 145 146
static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
{
	return container_of(pub, struct cfg80211_internal_bss, pub);
}

147 148 149 150 151
static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss)
{
	kref_get(&bss->ref);
}

Johannes Berg's avatar
Johannes Berg committed
152 153 154 155 156 157 158 159 160 161 162 163
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
struct cfg80211_registered_device *
168
__cfg80211_rdev_from_info(struct genl_info *info);
169

170 171 172 173 174 175
/*
 * This function returns a pointer to the driver
 * that the genl_info item that is passed refers to.
 * If successful, it returns non-NULL and also locks
 * the driver's mutex!
 *
176
 * This means that you need to call cfg80211_unlock_rdev()
177
 * before being allowed to acquire &cfg80211_mutex!
178 179 180
 *
 * This is necessary because we need to lock the global
 * 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.
182
 *
183
 * We don't want to keep cfg80211_mutex locked
184 185 186 187 188 189 190 191 192
 * for all the time in order to allow requests on
 * other interfaces to go through at the same time.
 *
 * The result of this can be a PTR_ERR and hence must
 * be checked with IS_ERR() for errors.
 */
extern struct cfg80211_registered_device *
cfg80211_get_dev_from_info(struct genl_info *info);

193
/* requires cfg80211_rdev_mutex to be held! */
194 195
struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);

196 197
/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
extern struct cfg80211_registered_device *
198 199 200 201
cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);

int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
			  struct net *net);
202

203
static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
Johannes Berg's avatar
Johannes Berg committed
204
{
205
	mutex_lock(&rdev->mtx);
Johannes Berg's avatar
Johannes Berg committed
206 207
}

208
static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
209
{
210 211
	BUG_ON(IS_ERR(rdev) || !rdev);
	mutex_unlock(&rdev->mtx);
212
}
213

Johannes Berg's avatar
Johannes Berg committed
214 215 216 217 218 219 220 221 222 223 224 225 226 227
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);
}

228 229
#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
230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251

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 {
252
			struct ieee80211_channel *channel;
Johannes Berg's avatar
Johannes Berg committed
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269
			u8 bssid[ETH_ALEN];
			const u8 *req_ie;
			const u8 *resp_ie;
			size_t req_ie_len;
			size_t resp_ie_len;
		} 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
270 271 272 273 274 275
struct cfg80211_cached_keys {
	struct key_params params[6];
	u8 data[6][WLAN_MAX_KEY_LEN];
	int def, defmgmt;
};

Johannes Berg's avatar
Johannes Berg committed
276

277
/* free object */
278
extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
279

280
extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
281 282
			       char *newname);

283 284
void ieee80211_set_bitrate_flags(struct wiphy *wiphy);

285
void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
286 287
void cfg80211_bss_age(struct cfg80211_registered_device *dev,
                      unsigned long age_secs);
288

Johannes Berg's avatar
Johannes Berg committed
289
/* IBSS */
Johannes Berg's avatar
Johannes Berg committed
290 291
int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
292 293
			 struct cfg80211_ibss_params *params,
			 struct cfg80211_cached_keys *connkeys);
Johannes Berg's avatar
Johannes Berg committed
294 295
int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
296 297
		       struct cfg80211_ibss_params *params,
		       struct cfg80211_cached_keys *connkeys);
298
void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
299 300
int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
301
int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
302
			struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
303
void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
Johannes Berg's avatar
Johannes Berg committed
304 305
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
			    struct wireless_dev *wdev);
Johannes Berg's avatar
Johannes Berg committed
306

307 308
/* mesh */
extern const struct mesh_config default_mesh_config;
309
extern const struct mesh_setup default_mesh_setup;
310 311
int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
312
			 const struct mesh_setup *setup,
313 314 315
			 const struct mesh_config *conf);
int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
316
		       const struct mesh_setup *setup,
317 318 319 320
		       const struct mesh_config *conf);
int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
			struct net_device *dev);

Johannes Berg's avatar
Johannes Berg committed
321
/* MLME */
Johannes Berg's avatar
Johannes Berg committed
322 323 324 325 326 327
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,
329 330
			 const u8 *key, int key_len, int key_idx,
			 bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
331 332 333 334
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
335
		       const u8 *ie, int ie_len,
336 337
		       const u8 *key, int key_len, int key_idx,
		       bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
338 339 340 341 342 343 344
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,
			  struct cfg80211_crypto_settings *crypt);
Johannes Berg's avatar
Johannes Berg committed
345 346
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
			struct net_device *dev, struct ieee80211_channel *chan,
347 348
			const u8 *bssid, const u8 *prev_bssid,
			const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
349 350
			const u8 *ie, int ie_len, bool use_mfp,
			struct cfg80211_crypto_settings *crypt);
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_deauth(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
int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
			   struct net_device *dev, const u8 *bssid,
361 362
			   const u8 *ie, int ie_len, u16 reason,
			   bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
363 364
void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
			struct net_device *dev);
Johannes Berg's avatar
Johannes Berg committed
365 366 367
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,
368 369
			       u16 status, bool wextev,
			       struct cfg80211_bss *bss);
370 371 372 373 374 375 376
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,
			  struct net_device *dev,
377
			  struct ieee80211_channel *chan, bool offchan,
378
			  enum nl80211_channel_type channel_type,
379
			  bool channel_type_valid, unsigned int wait,
380
			  const u8 *buf, size_t len, bool no_cck,
381
			  bool dont_wait_for_ack, u64 *cookie);
Johannes Berg's avatar
Johannes Berg committed
382

383
/* SME */
Johannes Berg's avatar
Johannes Berg committed
384 385
int __cfg80211_connect(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
386
		       struct cfg80211_connect_params *connect,
387 388
		       struct cfg80211_cached_keys *connkeys,
		       const u8 *prev_bssid);
389 390
int cfg80211_connect(struct cfg80211_registered_device *rdev,
		     struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
391 392
		     struct cfg80211_connect_params *connect,
		     struct cfg80211_cached_keys *connkeys);
Johannes Berg's avatar
Johannes Berg committed
393 394 395
int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, u16 reason,
			  bool wextev);
396
int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
397 398
			struct net_device *dev, u16 reason,
			bool wextev);
399 400 401
void __cfg80211_roamed(struct wireless_dev *wdev,
		       struct ieee80211_channel *channel,
		       const u8 *bssid,
Johannes Berg's avatar
Johannes Berg committed
402 403
		       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
404 405
int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
			      struct wireless_dev *wdev);
406

407
void cfg80211_conn_work(struct work_struct *work);
408
void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
409
bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
410

411
/* internal helpers */
412
bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
Johannes Berg's avatar
Johannes Berg committed
413 414
int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
				   struct key_params *params, int key_idx,
415
				   bool pairwise, const u8 *mac_addr);
Johannes Berg's avatar
Johannes Berg committed
416
void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
417 418 419
			     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);
Johannes Berg's avatar
Johannes Berg committed
420
void cfg80211_sme_disassoc(struct net_device *dev, int idx);
Johannes Berg's avatar
Johannes Berg committed
421
void __cfg80211_scan_done(struct work_struct *wk);
422
void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
423 424 425
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
426
void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
427 428 429 430
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);
431

432 433 434 435 436 437 438 439 440 441 442
int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
				  struct wireless_dev *wdev,
				  enum nl80211_iftype iftype);

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

443 444 445
struct ieee80211_channel *
rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
		  int freq, enum nl80211_channel_type channel_type);
446 447 448
int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
		      struct wireless_dev *wdev, int freq,
		      enum nl80211_channel_type channel_type);
449

450 451
u16 cfg80211_calculate_bitrate(struct rate_info *rate);

452 453 454 455
int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
			   const u8 *rates, unsigned int n_rates,
			   u32 *mask);

456 457 458
int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
				 u32 beacon_int);

459 460 461 462 463 464 465 466 467 468 469
#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

470
#endif /* __NET_WIRELESS_CORE_H */