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
 */
#ifndef __NET_WIRELESS_CORE_H
#define __NET_WIRELESS_CORE_H
#include <linux/list.h>
#include <linux/netdevice.h>
10
#include <linux/rbtree.h>
11
#include <linux/debugfs.h>
Johannes Berg's avatar
Johannes Berg committed
12 13
#include <linux/rfkill.h>
#include <linux/workqueue.h>
14
#include <linux/rtnetlink.h>
15 16
#include <net/genetlink.h>
#include <net/cfg80211.h>
17
#include "reg.h"
18

19 20 21

#define WIPHY_IDX_INVALID	-1

22
struct cfg80211_registered_device {
23
	const struct cfg80211_ops *ops;
24 25
	struct list_head list;

Johannes Berg's avatar
Johannes Berg committed
26 27 28 29 30
	/* rfkill support */
	struct rfkill_ops rfkill_ops;
	struct rfkill *rfkill;
	struct work_struct rfkill_sync;

31 32 33 34 35 36 37 38 39 40 41 42
	/* 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;

43
	/* wiphy index, internal only */
44
	int wiphy_idx;
45

46
	/* associated wireless interfaces, protected by rtnl or RCU */
47 48
	struct list_head wdev_list;
	int devlist_generation, wdev_id;
49 50
	int opencount; /* also protected by devlist_mtx */
	wait_queue_head_t dev_wait;
51

52 53
	struct list_head beacon_registrations;
	spinlock_t beacon_registrations_lock;
54

55
	/* protected by RTNL only */
56 57 58
	int num_running_ifaces;
	int num_running_monitor_ifaces;

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 sk_buff *scan_msg;
66
	struct cfg80211_sched_scan_request *sched_scan_req;
67
	unsigned long suspend_at;
Johannes Berg's avatar
Johannes Berg committed
68
	struct work_struct scan_done_wk;
69
	struct work_struct sched_scan_results_wk;
70

71
	struct genl_info *cur_cmd_info;
72

73
	struct work_struct conn_work;
Johannes Berg's avatar
Johannes Berg committed
74
	struct work_struct event_work;
75

76 77
	struct delayed_work dfs_update_channels_wk;

78 79 80
	/* netlink port which started critical protocol (0 means not started) */
	u32 crit_proto_nlportid;

81 82
	struct cfg80211_coalesce *coalesce;

83 84 85 86
	spinlock_t destroy_list_lock;
	struct list_head destroy_list;
	struct work_struct destroy_work;

87 88
	/* must be last because of the way we do wiphy_priv(),
	 * and it should at least be aligned to NETDEV_ALIGN */
Johannes Berg's avatar
Johannes Berg committed
89
	struct wiphy wiphy __aligned(NETDEV_ALIGN);
90 91 92
};

static inline
93
struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
94 95 96 97 98
{
	BUG_ON(!wiphy);
	return container_of(wiphy, struct cfg80211_registered_device, wiphy);
}

99 100 101
static inline void
cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
{
102
#ifdef CONFIG_PM
103 104
	int i;

105
	if (!rdev->wiphy.wowlan_config)
106
		return;
107 108 109 110 111 112 113 114 115
	for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
		kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
	kfree(rdev->wiphy.wowlan_config->patterns);
	if (rdev->wiphy.wowlan_config->tcp &&
	    rdev->wiphy.wowlan_config->tcp->sock)
		sock_release(rdev->wiphy.wowlan_config->tcp->sock);
	kfree(rdev->wiphy.wowlan_config->tcp);
	kfree(rdev->wiphy.wowlan_config);
#endif
116
}
117 118

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

122 123
struct cfg80211_internal_bss {
	struct list_head list;
124
	struct list_head hidden_list;
125 126
	struct rb_node rbn;
	unsigned long ts;
127
	unsigned long refcount;
Johannes Berg's avatar
Johannes Berg committed
128
	atomic_t hold;
Kalle Valo's avatar
Kalle Valo committed
129

130 131 132 133
	/* must be last because of priv member */
	struct cfg80211_bss pub;
};

Johannes Berg's avatar
Johannes Berg committed
134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
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);
}


151
struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
152 153 154 155
int get_wiphy_idx(struct wiphy *wiphy);

struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);

156 157
int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
			  struct net *net);
158

Johannes Berg's avatar
Johannes Berg committed
159 160 161 162 163 164 165 166 167 168 169 170 171 172
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);
}

173
#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
Johannes Berg's avatar
Johannes Berg committed
174

175 176
static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
{
177
	ASSERT_RTNL();
178 179 180 181 182

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

Johannes Berg's avatar
Johannes Berg committed
183 184 185 186 187
enum cfg80211_event_type {
	EVENT_CONNECT_RESULT,
	EVENT_ROAMED,
	EVENT_DISCONNECTED,
	EVENT_IBSS_JOINED,
188
	EVENT_STOPPED,
Johannes Berg's avatar
Johannes Berg committed
189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208
};

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;
209
			struct cfg80211_bss *bss;
Johannes Berg's avatar
Johannes Berg committed
210 211 212 213 214 215 216 217
		} rm;
		struct {
			const u8 *ie;
			size_t ie_len;
			u16 reason;
		} dc;
		struct {
			u8 bssid[ETH_ALEN];
218
			struct ieee80211_channel *channel;
Johannes Berg's avatar
Johannes Berg committed
219 220 221 222
		} ij;
	};
};

Johannes Berg's avatar
Johannes Berg committed
223 224 225 226 227 228
struct cfg80211_cached_keys {
	struct key_params params[6];
	u8 data[6][WLAN_MAX_KEY_LEN];
	int def, defmgmt;
};

229 230 231 232 233 234
enum cfg80211_chan_mode {
	CHAN_MODE_UNDEFINED,
	CHAN_MODE_SHARED,
	CHAN_MODE_EXCLUSIVE,
};

235 236 237 238
struct cfg80211_beacon_registration {
	struct list_head list;
	u32 nlportid;
};
Johannes Berg's avatar
Johannes Berg committed
239

240 241 242 243 244 245 246
struct cfg80211_iface_destroy {
	struct list_head list;
	u32 nlportid;
};

void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);

247
/* free object */
248
void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
249

250 251
int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
			char *newname);
252

253 254
void ieee80211_set_bitrate_flags(struct wiphy *wiphy);

255 256
void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
257
                      unsigned long age_secs);
258

Johannes Berg's avatar
Johannes Berg committed
259 260 261
/* IBSS */
int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
262 263
		       struct cfg80211_ibss_params *params,
		       struct cfg80211_cached_keys *connkeys);
264
void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
265 266
int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
			  struct net_device *dev, bool nowext);
Johannes Berg's avatar
Johannes Berg committed
267
int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
268
			struct net_device *dev, bool nowext);
269 270
void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
			    struct ieee80211_channel *channel);
Johannes Berg's avatar
Johannes Berg committed
271 272
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
			    struct wireless_dev *wdev);
Johannes Berg's avatar
Johannes Berg committed
273

274 275
/* mesh */
extern const struct mesh_config default_mesh_config;
276
extern const struct mesh_setup default_mesh_setup;
277 278
int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
			 struct net_device *dev,
279
			 struct mesh_setup *setup,
280 281 282
			 const struct mesh_config *conf);
int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
		       struct net_device *dev,
283
		       struct mesh_setup *setup,
284
		       const struct mesh_config *conf);
285 286
int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
			  struct net_device *dev);
287 288
int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
			struct net_device *dev);
289 290 291
int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
			      struct wireless_dev *wdev,
			      struct cfg80211_chan_def *chandef);
292

293
/* AP */
294 295
int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
		       struct net_device *dev, bool notify);
296
int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
297
		     struct net_device *dev, bool notify);
298

Johannes Berg's avatar
Johannes Berg committed
299 300
/* MLME */
int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
301 302 303 304
		       struct net_device *dev,
		       struct ieee80211_channel *chan,
		       enum nl80211_auth_type auth_type,
		       const u8 *bssid,
Johannes Berg's avatar
Johannes Berg committed
305
		       const u8 *ssid, int ssid_len,
Johannes Berg's avatar
Johannes Berg committed
306
		       const u8 *ie, int ie_len,
307 308
		       const u8 *key, int key_len, int key_idx,
		       const u8 *sae_data, int sae_data_len);
Johannes Berg's avatar
Johannes Berg committed
309
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
310 311 312
			struct net_device *dev,
			struct ieee80211_channel *chan,
			const u8 *bssid,
313
			const u8 *ssid, int ssid_len,
314
			struct cfg80211_assoc_request *req);
Johannes Berg's avatar
Johannes Berg committed
315 316
int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
			 struct net_device *dev, const u8 *bssid,
317 318
			 const u8 *ie, int ie_len, u16 reason,
			 bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
319 320
int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
			   struct net_device *dev, const u8 *bssid,
321 322
			   const u8 *ie, int ie_len, u16 reason,
			   bool local_state_change);
Johannes Berg's avatar
Johannes Berg committed
323 324
void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
			struct net_device *dev);
325 326 327 328 329 330
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,
331
			  struct wireless_dev *wdev,
332 333
			  struct cfg80211_mgmt_tx_params *params,
			  u64 *cookie);
334 335
void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
			       const struct ieee80211_ht_cap *ht_capa_mask);
336 337
void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
				const struct ieee80211_vht_cap *vht_capa_mask);
Johannes Berg's avatar
Johannes Berg committed
338

339
/* SME events */
340 341
int cfg80211_connect(struct cfg80211_registered_device *rdev,
		     struct net_device *dev,
Johannes Berg's avatar
Johannes Berg committed
342
		     struct cfg80211_connect_params *connect,
343 344
		     struct cfg80211_cached_keys *connkeys,
		     const u8 *prev_bssid);
345 346 347 348 349 350 351
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,
			       u16 status, bool wextev,
			       struct cfg80211_bss *bss);
void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
			     size_t ie_len, u16 reason, bool from_ap);
352
int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
353 354
			struct net_device *dev, u16 reason,
			bool wextev);
355
void __cfg80211_roamed(struct wireless_dev *wdev,
356
		       struct cfg80211_bss *bss,
Johannes Berg's avatar
Johannes Berg committed
357 358
		       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
359 360
int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
			      struct wireless_dev *wdev);
361

362
/* SME implementation */
363
void cfg80211_conn_work(struct work_struct *work);
364 365 366 367 368 369 370
void cfg80211_sme_scan_done(struct net_device *dev);
bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
void cfg80211_sme_disassoc(struct wireless_dev *wdev);
void cfg80211_sme_deauth(struct wireless_dev *wdev);
void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
371

372
/* internal helpers */
373
bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
Johannes Berg's avatar
Johannes Berg committed
374 375
int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
				   struct key_params *params, int key_idx,
376
				   bool pairwise, const u8 *mac_addr);
Johannes Berg's avatar
Johannes Berg committed
377
void __cfg80211_scan_done(struct work_struct *wk);
378 379
void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
			   bool send_message);
380 381 382
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
383
void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
384 385 386 387
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);
388
void cfg80211_process_wdev_events(struct wireless_dev *wdev);
389

390 391 392 393
int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
				 struct wireless_dev *wdev,
				 enum nl80211_iftype iftype,
				 struct ieee80211_channel *chan,
394 395
				 enum cfg80211_chan_mode chanmode,
				 u8 radar_detect);
396

397 398 399 400 401 402 403 404 405 406 407 408 409
/**
 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 * @wiphy: the wiphy to validate against
 * @chandef: the channel definition to check
 *
 * Checks if chandef is usable and we can/need start CAC on such channel.
 *
 * Return: Return true if all channels available and at least
 *	   one channel require CAC (NL80211_DFS_USABLE)
 */
bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
				 const struct cfg80211_chan_def *chandef);

410 411 412 413 414 415
void cfg80211_set_dfs_state(struct wiphy *wiphy,
			    const struct cfg80211_chan_def *chandef,
			    enum nl80211_dfs_state dfs_state);

void cfg80211_dfs_channels_update_work(struct work_struct *work);

416 417 418
unsigned int
cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
			      const struct cfg80211_chan_def *chandef);
419 420 421 422 423 424 425 426

static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
{
	unsigned long end = jiffies;

	if (end >= start)
		return jiffies_to_msecs(end - start);

427
	return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
428 429
}

430
void
431
cfg80211_get_chan_state(struct wireless_dev *wdev,
432
		        struct ieee80211_channel **chan,
433 434
		        enum cfg80211_chan_mode *chanmode,
		        u8 *radar_detect);
435

436
int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
437
				 struct cfg80211_chan_def *chandef);
438

439 440 441 442
int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
			   const u8 *rates, unsigned int n_rates,
			   u32 *mask);

443 444 445
int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
				 u32 beacon_int);

446 447 448
void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
			       enum nl80211_iftype iftype, int num);

449 450
void __cfg80211_leave(struct cfg80211_registered_device *rdev,
		      struct wireless_dev *wdev);
451 452 453
void cfg80211_leave(struct cfg80211_registered_device *rdev,
		    struct wireless_dev *wdev);

454 455 456
void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
			      struct wireless_dev *wdev);

457 458
#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10

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 */