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cfg80211: fix scheduled scan pointer access
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / wireless / core.h
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CommitLineData
1/*
2 * Wireless configuration interface internals.
3 *
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 */
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/rbtree.h>
12#include <linux/debugfs.h>
13#include <linux/rfkill.h>
14#include <linux/workqueue.h>
15#include <linux/rtnetlink.h>
16#include <net/genetlink.h>
17#include <net/cfg80211.h>
18#include "reg.h"
19
20
21#define WIPHY_IDX_INVALID -1
22
23struct cfg80211_registered_device {
24 const struct cfg80211_ops *ops;
25 struct list_head list;
26 /* we hold this mutex during any call so that
27 * we cannot do multiple calls at once, and also
28 * to avoid the deregister call to proceed while
29 * any call is in progress */
30 struct mutex mtx;
31
32 /* rfkill support */
33 struct rfkill_ops rfkill_ops;
34 struct rfkill *rfkill;
35 struct work_struct rfkill_sync;
36
37 /* ISO / IEC 3166 alpha2 for which this device is receiving
38 * country IEs on, this can help disregard country IEs from APs
39 * on the same alpha2 quickly. The alpha2 may differ from
40 * cfg80211_regdomain's alpha2 when an intersection has occurred.
41 * If the AP is reconfigured this can also be used to tell us if
42 * the country on the country IE changed. */
43 char country_ie_alpha2[2];
44
45 /* If a Country IE has been received this tells us the environment
46 * which its telling us its in. This defaults to ENVIRON_ANY */
47 enum environment_cap env;
48
49 /* wiphy index, internal only */
50 int wiphy_idx;
51
52 /* associated wireless interfaces */
53 struct mutex devlist_mtx;
54 /* protected by devlist_mtx or RCU */
55 struct list_head wdev_list;
56 int devlist_generation, wdev_id;
57 int opencount; /* also protected by devlist_mtx */
58 wait_queue_head_t dev_wait;
59
60 struct list_head beacon_registrations;
61 spinlock_t beacon_registrations_lock;
62
63 /* protected by RTNL only */
64 int num_running_ifaces;
65 int num_running_monitor_ifaces;
66
67 /* BSSes/scanning */
68 spinlock_t bss_lock;
69 struct list_head bss_list;
70 struct rb_root bss_tree;
71 u32 bss_generation;
72 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
73 struct cfg80211_sched_scan_request *sched_scan_req;
74 unsigned long suspend_at;
75 struct work_struct scan_done_wk;
76 struct work_struct sched_scan_results_wk;
77
78 struct mutex sched_scan_mtx;
79
80#ifdef CONFIG_NL80211_TESTMODE
81 struct genl_info *testmode_info;
82#endif
83
84 struct work_struct conn_work;
85 struct work_struct event_work;
86
87 struct cfg80211_wowlan *wowlan;
88
89 struct delayed_work dfs_update_channels_wk;
90
91 /* netlink port which started critical protocol (0 means not started) */
92 u32 crit_proto_nlportid;
93
94 /* must be last because of the way we do wiphy_priv(),
95 * and it should at least be aligned to NETDEV_ALIGN */
96 struct wiphy wiphy __aligned(NETDEV_ALIGN);
97};
98
99static inline
100struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
101{
102 BUG_ON(!wiphy);
103 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
104}
105
106static inline void
107cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
108{
109 int i;
110
111 if (!rdev->wowlan)
112 return;
113 for (i = 0; i < rdev->wowlan->n_patterns; i++)
114 kfree(rdev->wowlan->patterns[i].mask);
115 kfree(rdev->wowlan->patterns);
116 if (rdev->wowlan->tcp && rdev->wowlan->tcp->sock)
117 sock_release(rdev->wowlan->tcp->sock);
118 kfree(rdev->wowlan->tcp);
119 kfree(rdev->wowlan);
120}
121
122extern struct workqueue_struct *cfg80211_wq;
123extern struct mutex cfg80211_mutex;
124extern struct list_head cfg80211_rdev_list;
125extern int cfg80211_rdev_list_generation;
126
127static inline void assert_cfg80211_lock(void)
128{
129 lockdep_assert_held(&cfg80211_mutex);
130}
131
132struct cfg80211_internal_bss {
133 struct list_head list;
134 struct list_head hidden_list;
135 struct rb_node rbn;
136 unsigned long ts;
137 unsigned long refcount;
138 atomic_t hold;
139
140 /* must be last because of priv member */
141 struct cfg80211_bss pub;
142};
143
144static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
145{
146 return container_of(pub, struct cfg80211_internal_bss, pub);
147}
148
149static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
150{
151 atomic_inc(&bss->hold);
152}
153
154static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
155{
156 int r = atomic_dec_return(&bss->hold);
157 WARN_ON(r < 0);
158}
159
160
161struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
162int get_wiphy_idx(struct wiphy *wiphy);
163
164/* requires cfg80211_rdev_mutex to be held! */
165struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
166
167/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
168extern struct cfg80211_registered_device *
169cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
170
171int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
172 struct net *net);
173
174static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
175{
176 mutex_lock(&rdev->mtx);
177}
178
179static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
180{
181 BUG_ON(IS_ERR(rdev) || !rdev);
182 mutex_unlock(&rdev->mtx);
183}
184
185static inline void wdev_lock(struct wireless_dev *wdev)
186 __acquires(wdev)
187{
188 mutex_lock(&wdev->mtx);
189 __acquire(wdev->mtx);
190}
191
192static inline void wdev_unlock(struct wireless_dev *wdev)
193 __releases(wdev)
194{
195 __release(wdev->mtx);
196 mutex_unlock(&wdev->mtx);
197}
198
199#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
200#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
201
202static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
203{
204 ASSERT_RTNL();
205
206 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
207 rdev->num_running_ifaces > 0;
208}
209
210enum cfg80211_event_type {
211 EVENT_CONNECT_RESULT,
212 EVENT_ROAMED,
213 EVENT_DISCONNECTED,
214 EVENT_IBSS_JOINED,
215};
216
217struct cfg80211_event {
218 struct list_head list;
219 enum cfg80211_event_type type;
220
221 union {
222 struct {
223 u8 bssid[ETH_ALEN];
224 const u8 *req_ie;
225 const u8 *resp_ie;
226 size_t req_ie_len;
227 size_t resp_ie_len;
228 u16 status;
229 } cr;
230 struct {
231 const u8 *req_ie;
232 const u8 *resp_ie;
233 size_t req_ie_len;
234 size_t resp_ie_len;
235 struct cfg80211_bss *bss;
236 } rm;
237 struct {
238 const u8 *ie;
239 size_t ie_len;
240 u16 reason;
241 } dc;
242 struct {
243 u8 bssid[ETH_ALEN];
244 } ij;
245 };
246};
247
248struct cfg80211_cached_keys {
249 struct key_params params[6];
250 u8 data[6][WLAN_MAX_KEY_LEN];
251 int def, defmgmt;
252};
253
254enum cfg80211_chan_mode {
255 CHAN_MODE_UNDEFINED,
256 CHAN_MODE_SHARED,
257 CHAN_MODE_EXCLUSIVE,
258};
259
260struct cfg80211_beacon_registration {
261 struct list_head list;
262 u32 nlportid;
263};
264
265/* free object */
266extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
267
268extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
269 char *newname);
270
271void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
272
273void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
274void cfg80211_bss_age(struct cfg80211_registered_device *dev,
275 unsigned long age_secs);
276
277/* IBSS */
278int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
279 struct net_device *dev,
280 struct cfg80211_ibss_params *params,
281 struct cfg80211_cached_keys *connkeys);
282int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
283 struct net_device *dev,
284 struct cfg80211_ibss_params *params,
285 struct cfg80211_cached_keys *connkeys);
286void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
287int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
288 struct net_device *dev, bool nowext);
289int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
290 struct net_device *dev, bool nowext);
291void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
292int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
293 struct wireless_dev *wdev);
294
295/* mesh */
296extern const struct mesh_config default_mesh_config;
297extern const struct mesh_setup default_mesh_setup;
298int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
299 struct net_device *dev,
300 struct mesh_setup *setup,
301 const struct mesh_config *conf);
302int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
303 struct net_device *dev,
304 struct mesh_setup *setup,
305 const struct mesh_config *conf);
306int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
307 struct net_device *dev);
308int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
309 struct wireless_dev *wdev,
310 struct cfg80211_chan_def *chandef);
311
312/* AP */
313int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
314 struct net_device *dev);
315
316/* MLME */
317int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
318 struct net_device *dev,
319 struct ieee80211_channel *chan,
320 enum nl80211_auth_type auth_type,
321 const u8 *bssid,
322 const u8 *ssid, int ssid_len,
323 const u8 *ie, int ie_len,
324 const u8 *key, int key_len, int key_idx,
325 const u8 *sae_data, int sae_data_len);
326int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
327 struct net_device *dev, struct ieee80211_channel *chan,
328 enum nl80211_auth_type auth_type, const u8 *bssid,
329 const u8 *ssid, int ssid_len,
330 const u8 *ie, int ie_len,
331 const u8 *key, int key_len, int key_idx,
332 const u8 *sae_data, int sae_data_len);
333int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
334 struct net_device *dev,
335 struct ieee80211_channel *chan,
336 const u8 *bssid,
337 const u8 *ssid, int ssid_len,
338 struct cfg80211_assoc_request *req);
339int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
340 struct net_device *dev,
341 struct ieee80211_channel *chan,
342 const u8 *bssid,
343 const u8 *ssid, int ssid_len,
344 struct cfg80211_assoc_request *req);
345int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
346 struct net_device *dev, const u8 *bssid,
347 const u8 *ie, int ie_len, u16 reason,
348 bool local_state_change);
349int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
350 struct net_device *dev, const u8 *bssid,
351 const u8 *ie, int ie_len, u16 reason,
352 bool local_state_change);
353int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
354 struct net_device *dev, const u8 *bssid,
355 const u8 *ie, int ie_len, u16 reason,
356 bool local_state_change);
357void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
358 struct net_device *dev);
359void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
360 const u8 *req_ie, size_t req_ie_len,
361 const u8 *resp_ie, size_t resp_ie_len,
362 u16 status, bool wextev,
363 struct cfg80211_bss *bss);
364int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
365 u16 frame_type, const u8 *match_data,
366 int match_len);
367void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
368void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
369int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
370 struct wireless_dev *wdev,
371 struct ieee80211_channel *chan, bool offchan,
372 unsigned int wait, const u8 *buf, size_t len,
373 bool no_cck, bool dont_wait_for_ack, u64 *cookie);
374void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
375 const struct ieee80211_ht_cap *ht_capa_mask);
376void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
377 const struct ieee80211_vht_cap *vht_capa_mask);
378
379/* SME */
380int __cfg80211_connect(struct cfg80211_registered_device *rdev,
381 struct net_device *dev,
382 struct cfg80211_connect_params *connect,
383 struct cfg80211_cached_keys *connkeys,
384 const u8 *prev_bssid);
385int cfg80211_connect(struct cfg80211_registered_device *rdev,
386 struct net_device *dev,
387 struct cfg80211_connect_params *connect,
388 struct cfg80211_cached_keys *connkeys);
389int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
390 struct net_device *dev, u16 reason,
391 bool wextev);
392int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
393 struct net_device *dev, u16 reason,
394 bool wextev);
395void __cfg80211_roamed(struct wireless_dev *wdev,
396 struct cfg80211_bss *bss,
397 const u8 *req_ie, size_t req_ie_len,
398 const u8 *resp_ie, size_t resp_ie_len);
399int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
400 struct wireless_dev *wdev);
401
402void cfg80211_conn_work(struct work_struct *work);
403void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
404bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
405
406/* internal helpers */
407bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
408int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
409 struct key_params *params, int key_idx,
410 bool pairwise, const u8 *mac_addr);
411void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
412 size_t ie_len, u16 reason, bool from_ap);
413void cfg80211_sme_scan_done(struct net_device *dev);
414void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
415void cfg80211_sme_disassoc(struct net_device *dev,
416 struct cfg80211_internal_bss *bss);
417void __cfg80211_scan_done(struct work_struct *wk);
418void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
419void __cfg80211_sched_scan_results(struct work_struct *wk);
420int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
421 bool driver_initiated);
422void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
423int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
424 struct net_device *dev, enum nl80211_iftype ntype,
425 u32 *flags, struct vif_params *params);
426void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
427void cfg80211_process_wdev_events(struct wireless_dev *wdev);
428
429int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
430 struct wireless_dev *wdev,
431 enum nl80211_iftype iftype,
432 struct ieee80211_channel *chan,
433 enum cfg80211_chan_mode chanmode,
434 u8 radar_detect);
435
436/**
437 * cfg80211_chandef_dfs_required - checks if radar detection is required
438 * @wiphy: the wiphy to validate against
439 * @chandef: the channel definition to check
440 * Return: 1 if radar detection is required, 0 if it is not, < 0 on error
441 */
442int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
443 const struct cfg80211_chan_def *c);
444
445void cfg80211_set_dfs_state(struct wiphy *wiphy,
446 const struct cfg80211_chan_def *chandef,
447 enum nl80211_dfs_state dfs_state);
448
449void cfg80211_dfs_channels_update_work(struct work_struct *work);
450
451
452static inline int
453cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
454 struct wireless_dev *wdev,
455 enum nl80211_iftype iftype)
456{
457 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
458 CHAN_MODE_UNDEFINED, 0);
459}
460
461static inline int
462cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
463 enum nl80211_iftype iftype)
464{
465 return cfg80211_can_change_interface(rdev, NULL, iftype);
466}
467
468static inline int
469cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
470 struct wireless_dev *wdev,
471 struct ieee80211_channel *chan,
472 enum cfg80211_chan_mode chanmode)
473{
474 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
475 chan, chanmode, 0);
476}
477
478static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
479{
480 unsigned long end = jiffies;
481
482 if (end >= start)
483 return jiffies_to_msecs(end - start);
484
485 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
486}
487
488void
489cfg80211_get_chan_state(struct wireless_dev *wdev,
490 struct ieee80211_channel **chan,
491 enum cfg80211_chan_mode *chanmode);
492
493int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
494 struct cfg80211_chan_def *chandef);
495
496int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
497 const u8 *rates, unsigned int n_rates,
498 u32 *mask);
499
500int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
501 u32 beacon_int);
502
503void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
504 enum nl80211_iftype iftype, int num);
505
506void cfg80211_leave(struct cfg80211_registered_device *rdev,
507 struct wireless_dev *wdev);
508
509void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
510 struct wireless_dev *wdev);
511
512#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
513
514#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
515#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
516#else
517/*
518 * Trick to enable using it as a condition,
519 * and also not give a warning when it's
520 * not used that way.
521 */
522#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
523#endif
524
525#endif /* __NET_WIRELESS_CORE_H */
kernel source for telekom puls (alcatel/mediatek)