core.h 14.5 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
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
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);
}


159
struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
160 161
int get_wiphy_idx(struct wiphy *wiphy);

162
/* requires cfg80211_rdev_mutex to be held! */
163 164
struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);

165 166
/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
extern struct cfg80211_registered_device *
167 168 169 170
cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);

int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
			  struct net *net);
171

172
static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
Johannes Berg's avatar
Johannes Berg committed
173
{
174
	mutex_lock(&rdev->mtx);
Johannes Berg's avatar
Johannes Berg committed
175 176
}

177
static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
178
{
179 180
	BUG_ON(IS_ERR(rdev) || !rdev);
	mutex_unlock(&rdev->mtx);
181
}
182

Johannes Berg's avatar
Johannes Berg committed
183 184 185 186 187 188 189 190 191 192 193 194 195 196
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);
}

197 198
#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
199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224

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;
225
			struct cfg80211_bss *bss;
Johannes Berg's avatar
Johannes Berg committed
226 227 228 229 230 231 232 233 234 235 236 237
		} 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
238 239 240 241 242 243
struct cfg80211_cached_keys {
	struct key_params params[6];
	u8 data[6][WLAN_MAX_KEY_LEN];
	int def, defmgmt;
};

244 245 246 247 248 249
enum cfg80211_chan_mode {
	CHAN_MODE_UNDEFINED,
	CHAN_MODE_SHARED,
	CHAN_MODE_EXCLUSIVE,
};

Johannes Berg's avatar
Johannes Berg committed
250

251
/* free object */
252
extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
253

254
extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
255 256
			       char *newname);

257 258
void ieee80211_set_bitrate_flags(struct wiphy *wiphy);

259
void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
260 261
void cfg80211_bss_age(struct cfg80211_registered_device *dev,
                      unsigned long age_secs);
262

Johannes Berg's avatar
Johannes Berg committed
263
/* IBSS */
Johannes Berg's avatar
Johannes Berg committed
264 265
int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
266 267
			 struct cfg80211_ibss_params *params,
			 struct cfg80211_cached_keys *connkeys);
Johannes Berg's avatar
Johannes Berg committed
268 269
int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
270 271
		       struct cfg80211_ibss_params *params,
		       struct cfg80211_cached_keys *connkeys);
272
void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
273 274
int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
275
int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
276
			struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
277
void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
Johannes Berg's avatar
Johannes Berg committed
278 279
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
			    struct wireless_dev *wdev);
Johannes Berg's avatar
Johannes Berg committed
280

281 282
/* mesh */
extern const struct mesh_config default_mesh_config;
283
extern const struct mesh_setup default_mesh_setup;
284 285
int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
286
			 struct mesh_setup *setup,
287 288 289
			 const struct mesh_config *conf);
int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
290
		       struct mesh_setup *setup,
291 292 293
		       const struct mesh_config *conf);
int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
			struct net_device *dev);
294 295 296
int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
			   struct wireless_dev *wdev, int freq,
			   enum nl80211_channel_type channel_type);
297

298 299 300 301
/* AP */
int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
		     struct net_device *dev);

Johannes Berg's avatar
Johannes Berg committed
302
/* MLME */
Johannes Berg's avatar
Johannes Berg committed
303 304 305 306 307 308
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
309
			 const u8 *ie, int ie_len,
310
			 const u8 *key, int key_len, int key_idx);
Johannes Berg's avatar
Johannes Berg committed
311 312 313 314
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
315
		       const u8 *ie, int ie_len,
316
		       const u8 *key, int key_len, int key_idx);
Johannes Berg's avatar
Johannes Berg committed
317 318 319 320 321 322
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,
323 324 325
			  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
326 327
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
			struct net_device *dev, struct ieee80211_channel *chan,
328 329
			const u8 *bssid, const u8 *prev_bssid,
			const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
330
			const u8 *ie, int ie_len, bool use_mfp,
331 332 333
			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
334 335
int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
			   struct net_device *dev, const u8 *bssid,
336 337
			   const u8 *ie, int ie_len, u16 reason,
			   bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
338 339
int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
			 struct net_device *dev, const u8 *bssid,
340 341
			 const u8 *ie, int ie_len, u16 reason,
			 bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
342 343
int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
			   struct net_device *dev, const u8 *bssid,
344 345
			   const u8 *ie, int ie_len, u16 reason,
			   bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
346 347
void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
			struct net_device *dev);
Johannes Berg's avatar
Johannes Berg committed
348 349 350
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,
351 352
			       u16 status, bool wextev,
			       struct cfg80211_bss *bss);
353 354 355 356 357 358 359
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,
360
			  struct ieee80211_channel *chan, bool offchan,
361
			  enum nl80211_channel_type channel_type,
362
			  bool channel_type_valid, unsigned int wait,
363
			  const u8 *buf, size_t len, bool no_cck,
364
			  bool dont_wait_for_ack, u64 *cookie);
365 366
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
367

368
/* SME */
Johannes Berg's avatar
Johannes Berg committed
369 370
int __cfg80211_connect(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
371
		       struct cfg80211_connect_params *connect,
372 373
		       struct cfg80211_cached_keys *connkeys,
		       const u8 *prev_bssid);
374 375
int cfg80211_connect(struct cfg80211_registered_device *rdev,
		     struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
376 377
		     struct cfg80211_connect_params *connect,
		     struct cfg80211_cached_keys *connkeys);
Johannes Berg's avatar
Johannes Berg committed
378 379 380
int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, u16 reason,
			  bool wextev);
381
int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
382 383
			struct net_device *dev, u16 reason,
			bool wextev);
384
void __cfg80211_roamed(struct wireless_dev *wdev,
385
		       struct cfg80211_bss *bss,
Johannes Berg's avatar
Johannes Berg committed
386 387
		       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
388 389
int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
			      struct wireless_dev *wdev);
390

391
void cfg80211_conn_work(struct work_struct *work);
392
void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
393
bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
394

395
/* internal helpers */
396
bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
Johannes Berg's avatar
Johannes Berg committed
397 398
int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
				   struct key_params *params, int key_idx,
399
				   bool pairwise, const u8 *mac_addr);
Johannes Berg's avatar
Johannes Berg committed
400
void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
401 402 403
			     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);
404 405
void cfg80211_sme_disassoc(struct net_device *dev,
			   struct cfg80211_internal_bss *bss);
Johannes Berg's avatar
Johannes Berg committed
406
void __cfg80211_scan_done(struct work_struct *wk);
407
void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
408 409 410
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
411
void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
412 413 414 415
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);
416

417 418 419 420 421 422 423 424 425 426 427
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);
}

428 429 430 431 432 433
void
cfg80211_get_chan_state(struct cfg80211_registered_device *rdev,
		        struct wireless_dev *wdev,
		        struct ieee80211_channel **chan,
		        enum cfg80211_chan_mode *chanmode);

434 435 436
struct ieee80211_channel *
rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
		  int freq, enum nl80211_channel_type channel_type);
437 438
int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
				 int freq, enum nl80211_channel_type chantype);
439

440 441 442 443
int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
			   const u8 *rates, unsigned int n_rates,
			   u32 *mask);

444 445 446
int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
				 u32 beacon_int);

447 448 449 450 451 452 453 454 455 456 457
#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

458
#endif /* __NET_WIRELESS_CORE_H */