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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/kref.h>
12#include <linux/rbtree.h>
13#include <linux/debugfs.h>
14#include <linux/rfkill.h>
15#include <linux/workqueue.h>
16#include <net/genetlink.h>
17#include <net/cfg80211.h>
18#include "reg.h"
19
20struct cfg80211_registered_device {
21 const struct cfg80211_ops *ops;
22 struct list_head list;
23 /* we hold this mutex during any call so that
24 * we cannot do multiple calls at once, and also
25 * to avoid the deregister call to proceed while
26 * any call is in progress */
27 struct mutex mtx;
28
29 /* rfkill support */
30 struct rfkill_ops rfkill_ops;
31 struct rfkill *rfkill;
32 struct work_struct rfkill_sync;
33
34 /* ISO / IEC 3166 alpha2 for which this device is receiving
35 * country IEs on, this can help disregard country IEs from APs
36 * on the same alpha2 quickly. The alpha2 may differ from
37 * cfg80211_regdomain's alpha2 when an intersection has occurred.
38 * If the AP is reconfigured this can also be used to tell us if
39 * the country on the country IE changed. */
40 char country_ie_alpha2[2];
41
42 /* If a Country IE has been received this tells us the environment
43 * which its telling us its in. This defaults to ENVIRON_ANY */
44 enum environment_cap env;
45
46 /* wiphy index, internal only */
47 int wiphy_idx;
48
49 /* associate netdev list */
50 struct mutex devlist_mtx;
51 /* protected by devlist_mtx or RCU */
52 struct list_head netdev_list;
53 int devlist_generation;
54 int opencount; /* also protected by devlist_mtx */
55 wait_queue_head_t dev_wait;
56
57 u32 ap_beacons_nlpid;
58
59 /* BSSes/scanning */
60 spinlock_t bss_lock;
61 struct list_head bss_list;
62 struct rb_root bss_tree;
63 u32 bss_generation;
64 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
65 struct cfg80211_sched_scan_request *sched_scan_req;
66 unsigned long suspend_at;
67 struct work_struct scan_done_wk;
68 struct work_struct sched_scan_results_wk;
69
70 struct mutex sched_scan_mtx;
71
72#ifdef CONFIG_NL80211_TESTMODE
73 struct genl_info *testmode_info;
74#endif
75
76 struct work_struct conn_work;
77 struct work_struct event_work;
78
79 struct cfg80211_wowlan *wowlan;
80
81 /* must be last because of the way we do wiphy_priv(),
82 * and it should at least be aligned to NETDEV_ALIGN */
83 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
84};
85
86static inline
87struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
88{
89 BUG_ON(!wiphy);
90 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
91}
92
93/* Note 0 is valid, hence phy0 */
94static inline
95bool wiphy_idx_valid(int wiphy_idx)
96{
97 return wiphy_idx >= 0;
98}
99
100static inline void
101cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
102{
103 int i;
104
105 if (!rdev->wowlan)
106 return;
107 for (i = 0; i < rdev->wowlan->n_patterns; i++)
108 kfree(rdev->wowlan->patterns[i].mask);
109 kfree(rdev->wowlan->patterns);
110 kfree(rdev->wowlan);
111}
112
113extern struct workqueue_struct *cfg80211_wq;
114extern struct mutex cfg80211_mutex;
115extern struct list_head cfg80211_rdev_list;
116extern int cfg80211_rdev_list_generation;
117
118static inline void assert_cfg80211_lock(void)
119{
120 lockdep_assert_held(&cfg80211_mutex);
121}
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#define WIPHY_IDX_STALE -1
128
129struct cfg80211_internal_bss {
130 struct list_head list;
131 struct rb_node rbn;
132 unsigned long ts;
133 struct kref ref;
134 atomic_t hold;
135 bool beacon_ies_allocated;
136 bool proberesp_ies_allocated;
137
138 /* must be last because of priv member */
139 struct cfg80211_bss pub;
140};
141
142static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
143{
144 return container_of(pub, struct cfg80211_internal_bss, pub);
145}
146
147static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
148{
149 atomic_inc(&bss->hold);
150}
151
152static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
153{
154 int r = atomic_dec_return(&bss->hold);
155 WARN_ON(r < 0);
156}
157
158
159struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
160int get_wiphy_idx(struct wiphy *wiphy);
161
162struct cfg80211_registered_device *
163__cfg80211_rdev_from_info(struct genl_info *info);
164
165/*
166 * This function returns a pointer to the driver
167 * that the genl_info item that is passed refers to.
168 * If successful, it returns non-NULL and also locks
169 * the driver's mutex!
170 *
171 * This means that you need to call cfg80211_unlock_rdev()
172 * before being allowed to acquire &cfg80211_mutex!
173 *
174 * This is necessary because we need to lock the global
175 * mutex to get an item off the list safely, and then
176 * we lock the rdev mutex so it doesn't go away under us.
177 *
178 * We don't want to keep cfg80211_mutex locked
179 * for all the time in order to allow requests on
180 * other interfaces to go through at the same time.
181 *
182 * The result of this can be a PTR_ERR and hence must
183 * be checked with IS_ERR() for errors.
184 */
185extern struct cfg80211_registered_device *
186cfg80211_get_dev_from_info(struct genl_info *info);
187
188/* requires cfg80211_rdev_mutex to be held! */
189struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
190
191/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
192extern struct cfg80211_registered_device *
193cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
194
195int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
196 struct net *net);
197
198static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
199{
200 mutex_lock(&rdev->mtx);
201}
202
203static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
204{
205 BUG_ON(IS_ERR(rdev) || !rdev);
206 mutex_unlock(&rdev->mtx);
207}
208
209static inline void wdev_lock(struct wireless_dev *wdev)
210 __acquires(wdev)
211{
212 mutex_lock(&wdev->mtx);
213 __acquire(wdev->mtx);
214}
215
216static inline void wdev_unlock(struct wireless_dev *wdev)
217 __releases(wdev)
218{
219 __release(wdev->mtx);
220 mutex_unlock(&wdev->mtx);
221}
222
223#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
224#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
225
226enum cfg80211_event_type {
227 EVENT_CONNECT_RESULT,
228 EVENT_ROAMED,
229 EVENT_DISCONNECTED,
230 EVENT_IBSS_JOINED,
231};
232
233struct cfg80211_event {
234 struct list_head list;
235 enum cfg80211_event_type type;
236
237 union {
238 struct {
239 u8 bssid[ETH_ALEN];
240 const u8 *req_ie;
241 const u8 *resp_ie;
242 size_t req_ie_len;
243 size_t resp_ie_len;
244 u16 status;
245 } cr;
246 struct {
247 const u8 *req_ie;
248 const u8 *resp_ie;
249 size_t req_ie_len;
250 size_t resp_ie_len;
251 struct cfg80211_bss *bss;
252 } rm;
253 struct {
254 const u8 *ie;
255 size_t ie_len;
256 u16 reason;
257 } dc;
258 struct {
259 u8 bssid[ETH_ALEN];
260 } ij;
261 };
262};
263
264struct cfg80211_cached_keys {
265 struct key_params params[6];
266 u8 data[6][WLAN_MAX_KEY_LEN];
267 int def, defmgmt;
268};
269
270
271/* free object */
272extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
273
274extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
275 char *newname);
276
277void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
278
279void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
280void cfg80211_bss_age(struct cfg80211_registered_device *dev,
281 unsigned long age_secs);
282
283/* IBSS */
284int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
285 struct net_device *dev,
286 struct cfg80211_ibss_params *params,
287 struct cfg80211_cached_keys *connkeys);
288int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
289 struct net_device *dev,
290 struct cfg80211_ibss_params *params,
291 struct cfg80211_cached_keys *connkeys);
292void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
293int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
294 struct net_device *dev, bool nowext);
295int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
296 struct net_device *dev, bool nowext);
297void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
298int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
299 struct wireless_dev *wdev);
300
301/* mesh */
302extern const struct mesh_config default_mesh_config;
303extern const struct mesh_setup default_mesh_setup;
304int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
305 struct net_device *dev,
306 const struct mesh_setup *setup,
307 const struct mesh_config *conf);
308int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
309 struct net_device *dev,
310 const struct mesh_setup *setup,
311 const struct mesh_config *conf);
312int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
313 struct net_device *dev);
314
315/* MLME */
316int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
317 struct net_device *dev,
318 struct ieee80211_channel *chan,
319 enum nl80211_auth_type auth_type,
320 const u8 *bssid,
321 const u8 *ssid, int ssid_len,
322 const u8 *ie, int ie_len,
323 const u8 *key, int key_len, int key_idx);
324int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
325 struct net_device *dev, struct ieee80211_channel *chan,
326 enum nl80211_auth_type auth_type, const u8 *bssid,
327 const u8 *ssid, int ssid_len,
328 const u8 *ie, int ie_len,
329 const u8 *key, int key_len, int key_idx);
330int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
331 struct net_device *dev,
332 struct ieee80211_channel *chan,
333 const u8 *bssid, const u8 *prev_bssid,
334 const u8 *ssid, int ssid_len,
335 const u8 *ie, int ie_len, bool use_mfp,
336 struct cfg80211_crypto_settings *crypt,
337 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
338 struct ieee80211_ht_cap *ht_capa_mask);
339int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
340 struct net_device *dev, struct ieee80211_channel *chan,
341 const u8 *bssid, const u8 *prev_bssid,
342 const u8 *ssid, int ssid_len,
343 const u8 *ie, int ie_len, bool use_mfp,
344 struct cfg80211_crypto_settings *crypt,
345 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
346 struct ieee80211_ht_cap *ht_capa_mask);
347int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
348 struct net_device *dev, const u8 *bssid,
349 const u8 *ie, int ie_len, u16 reason,
350 bool local_state_change);
351int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
352 struct net_device *dev, const u8 *bssid,
353 const u8 *ie, int ie_len, u16 reason,
354 bool local_state_change);
355int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
356 struct net_device *dev, const u8 *bssid,
357 const u8 *ie, int ie_len, u16 reason,
358 bool local_state_change);
359void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
360 struct net_device *dev);
361void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
362 const u8 *req_ie, size_t req_ie_len,
363 const u8 *resp_ie, size_t resp_ie_len,
364 u16 status, bool wextev,
365 struct cfg80211_bss *bss);
366int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
367 u16 frame_type, const u8 *match_data,
368 int match_len);
369void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
370void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
371int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
372 struct net_device *dev,
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);
378void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
379 const struct ieee80211_ht_cap *ht_capa_mask);
380
381/* SME */
382int __cfg80211_connect(struct cfg80211_registered_device *rdev,
383 struct net_device *dev,
384 struct cfg80211_connect_params *connect,
385 struct cfg80211_cached_keys *connkeys,
386 const u8 *prev_bssid);
387int cfg80211_connect(struct cfg80211_registered_device *rdev,
388 struct net_device *dev,
389 struct cfg80211_connect_params *connect,
390 struct cfg80211_cached_keys *connkeys);
391int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
392 struct net_device *dev, u16 reason,
393 bool wextev);
394int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
395 struct net_device *dev, u16 reason,
396 bool wextev);
397void __cfg80211_roamed(struct wireless_dev *wdev,
398 struct cfg80211_bss *bss,
399 const u8 *req_ie, size_t req_ie_len,
400 const u8 *resp_ie, size_t resp_ie_len);
401int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
402 struct wireless_dev *wdev);
403
404void cfg80211_conn_work(struct work_struct *work);
405void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
406bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
407
408/* internal helpers */
409bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
410int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
411 struct key_params *params, int key_idx,
412 bool pairwise, const u8 *mac_addr);
413void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
414 size_t ie_len, u16 reason, bool from_ap);
415void cfg80211_sme_scan_done(struct net_device *dev);
416void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
417void cfg80211_sme_disassoc(struct net_device *dev,
418 struct cfg80211_internal_bss *bss);
419void __cfg80211_scan_done(struct work_struct *wk);
420void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
421void __cfg80211_sched_scan_results(struct work_struct *wk);
422int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
423 bool driver_initiated);
424void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
425int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
426 struct net_device *dev, enum nl80211_iftype ntype,
427 u32 *flags, struct vif_params *params);
428void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
429
430int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
431 struct wireless_dev *wdev,
432 enum nl80211_iftype iftype);
433
434static inline int
435cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
436 enum nl80211_iftype iftype)
437{
438 return cfg80211_can_change_interface(rdev, NULL, iftype);
439}
440
441struct ieee80211_channel *
442rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
443 int freq, enum nl80211_channel_type channel_type);
444int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
445 struct wireless_dev *wdev, int freq,
446 enum nl80211_channel_type channel_type);
447
448int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
449 const u8 *rates, unsigned int n_rates,
450 u32 *mask);
451
452int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
453 u32 beacon_int);
454
455#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
456#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
457#else
458/*
459 * Trick to enable using it as a condition,
460 * and also not give a warning when it's
461 * not used that way.
462 */
463#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
464#endif
465
466#endif /* __NET_WIRELESS_CORE_H */