cfg80211: configuration for WoWLAN over TCP
[linux-3.10.git] / net / wireless / core.h
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
23 struct 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         /* must be last because of the way we do wiphy_priv(),
90          * and it should at least be aligned to NETDEV_ALIGN */
91         struct wiphy wiphy __aligned(NETDEV_ALIGN);
92 };
93
94 static inline
95 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
96 {
97         BUG_ON(!wiphy);
98         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
99 }
100
101 static inline void
102 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
103 {
104         int i;
105
106         if (!rdev->wowlan)
107                 return;
108         for (i = 0; i < rdev->wowlan->n_patterns; i++)
109                 kfree(rdev->wowlan->patterns[i].mask);
110         kfree(rdev->wowlan->patterns);
111         if (rdev->wowlan->tcp && rdev->wowlan->tcp->sock)
112                 sock_release(rdev->wowlan->tcp->sock);
113         kfree(rdev->wowlan->tcp);
114         kfree(rdev->wowlan);
115 }
116
117 extern struct workqueue_struct *cfg80211_wq;
118 extern struct mutex cfg80211_mutex;
119 extern struct list_head cfg80211_rdev_list;
120 extern int cfg80211_rdev_list_generation;
121
122 static inline void assert_cfg80211_lock(void)
123 {
124         lockdep_assert_held(&cfg80211_mutex);
125 }
126
127 struct cfg80211_internal_bss {
128         struct list_head list;
129         struct list_head hidden_list;
130         struct rb_node rbn;
131         unsigned long ts;
132         unsigned long refcount;
133         atomic_t hold;
134
135         /* must be last because of priv member */
136         struct cfg80211_bss pub;
137 };
138
139 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
140 {
141         return container_of(pub, struct cfg80211_internal_bss, pub);
142 }
143
144 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
145 {
146         atomic_inc(&bss->hold);
147 }
148
149 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
150 {
151         int r = atomic_dec_return(&bss->hold);
152         WARN_ON(r < 0);
153 }
154
155
156 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
157 int get_wiphy_idx(struct wiphy *wiphy);
158
159 /* requires cfg80211_rdev_mutex to be held! */
160 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
161
162 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */
163 extern struct cfg80211_registered_device *
164 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
165
166 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
167                           struct net *net);
168
169 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
170 {
171         mutex_lock(&rdev->mtx);
172 }
173
174 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
175 {
176         BUG_ON(IS_ERR(rdev) || !rdev);
177         mutex_unlock(&rdev->mtx);
178 }
179
180 static inline void wdev_lock(struct wireless_dev *wdev)
181         __acquires(wdev)
182 {
183         mutex_lock(&wdev->mtx);
184         __acquire(wdev->mtx);
185 }
186
187 static inline void wdev_unlock(struct wireless_dev *wdev)
188         __releases(wdev)
189 {
190         __release(wdev->mtx);
191         mutex_unlock(&wdev->mtx);
192 }
193
194 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
195 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
196
197 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
198 {
199         ASSERT_RTNL();
200
201         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
202                rdev->num_running_ifaces > 0;
203 }
204
205 enum cfg80211_event_type {
206         EVENT_CONNECT_RESULT,
207         EVENT_ROAMED,
208         EVENT_DISCONNECTED,
209         EVENT_IBSS_JOINED,
210 };
211
212 struct cfg80211_event {
213         struct list_head list;
214         enum cfg80211_event_type type;
215
216         union {
217                 struct {
218                         u8 bssid[ETH_ALEN];
219                         const u8 *req_ie;
220                         const u8 *resp_ie;
221                         size_t req_ie_len;
222                         size_t resp_ie_len;
223                         u16 status;
224                 } cr;
225                 struct {
226                         const u8 *req_ie;
227                         const u8 *resp_ie;
228                         size_t req_ie_len;
229                         size_t resp_ie_len;
230                         struct cfg80211_bss *bss;
231                 } rm;
232                 struct {
233                         const u8 *ie;
234                         size_t ie_len;
235                         u16 reason;
236                 } dc;
237                 struct {
238                         u8 bssid[ETH_ALEN];
239                 } ij;
240         };
241 };
242
243 struct cfg80211_cached_keys {
244         struct key_params params[6];
245         u8 data[6][WLAN_MAX_KEY_LEN];
246         int def, defmgmt;
247 };
248
249 enum cfg80211_chan_mode {
250         CHAN_MODE_UNDEFINED,
251         CHAN_MODE_SHARED,
252         CHAN_MODE_EXCLUSIVE,
253 };
254
255 struct cfg80211_beacon_registration {
256         struct list_head list;
257         u32 nlportid;
258 };
259
260 /* free object */
261 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
262
263 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
264                                char *newname);
265
266 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
267
268 void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
269 void cfg80211_bss_age(struct cfg80211_registered_device *dev,
270                       unsigned long age_secs);
271
272 /* IBSS */
273 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
274                          struct net_device *dev,
275                          struct cfg80211_ibss_params *params,
276                          struct cfg80211_cached_keys *connkeys);
277 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
278                        struct net_device *dev,
279                        struct cfg80211_ibss_params *params,
280                        struct cfg80211_cached_keys *connkeys);
281 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
282 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
283                           struct net_device *dev, bool nowext);
284 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
285                         struct net_device *dev, bool nowext);
286 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
287 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
288                             struct wireless_dev *wdev);
289
290 /* mesh */
291 extern const struct mesh_config default_mesh_config;
292 extern const struct mesh_setup default_mesh_setup;
293 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
294                          struct net_device *dev,
295                          struct mesh_setup *setup,
296                          const struct mesh_config *conf);
297 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
298                        struct net_device *dev,
299                        struct mesh_setup *setup,
300                        const struct mesh_config *conf);
301 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
302                         struct net_device *dev);
303 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
304                               struct wireless_dev *wdev,
305                               struct cfg80211_chan_def *chandef);
306
307 /* AP */
308 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
309                      struct net_device *dev);
310
311 /* MLME */
312 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
313                          struct net_device *dev,
314                          struct ieee80211_channel *chan,
315                          enum nl80211_auth_type auth_type,
316                          const u8 *bssid,
317                          const u8 *ssid, int ssid_len,
318                          const u8 *ie, int ie_len,
319                          const u8 *key, int key_len, int key_idx,
320                          const u8 *sae_data, int sae_data_len);
321 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
322                        struct net_device *dev, struct ieee80211_channel *chan,
323                        enum nl80211_auth_type auth_type, const u8 *bssid,
324                        const u8 *ssid, int ssid_len,
325                        const u8 *ie, int ie_len,
326                        const u8 *key, int key_len, int key_idx,
327                        const u8 *sae_data, int sae_data_len);
328 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
329                           struct net_device *dev,
330                           struct ieee80211_channel *chan,
331                           const u8 *bssid, const u8 *prev_bssid,
332                           const u8 *ssid, int ssid_len,
333                           const u8 *ie, int ie_len, bool use_mfp,
334                           struct cfg80211_crypto_settings *crypt,
335                           u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
336                           struct ieee80211_ht_cap *ht_capa_mask);
337 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
338                         struct net_device *dev, struct ieee80211_channel *chan,
339                         const u8 *bssid, const u8 *prev_bssid,
340                         const u8 *ssid, int ssid_len,
341                         const u8 *ie, int ie_len, bool use_mfp,
342                         struct cfg80211_crypto_settings *crypt,
343                         u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
344                         struct ieee80211_ht_cap *ht_capa_mask);
345 int __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);
349 int 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);
353 int 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);
357 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
358                         struct net_device *dev);
359 void __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);
364 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
365                                 u16 frame_type, const u8 *match_data,
366                                 int match_len);
367 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
368 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
369 int 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);
374 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
375                                const struct ieee80211_ht_cap *ht_capa_mask);
376
377 /* SME */
378 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
379                        struct net_device *dev,
380                        struct cfg80211_connect_params *connect,
381                        struct cfg80211_cached_keys *connkeys,
382                        const u8 *prev_bssid);
383 int cfg80211_connect(struct cfg80211_registered_device *rdev,
384                      struct net_device *dev,
385                      struct cfg80211_connect_params *connect,
386                      struct cfg80211_cached_keys *connkeys);
387 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
388                           struct net_device *dev, u16 reason,
389                           bool wextev);
390 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
391                         struct net_device *dev, u16 reason,
392                         bool wextev);
393 void __cfg80211_roamed(struct wireless_dev *wdev,
394                        struct cfg80211_bss *bss,
395                        const u8 *req_ie, size_t req_ie_len,
396                        const u8 *resp_ie, size_t resp_ie_len);
397 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
398                               struct wireless_dev *wdev);
399
400 void cfg80211_conn_work(struct work_struct *work);
401 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
402 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
403
404 /* internal helpers */
405 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
406 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
407                                    struct key_params *params, int key_idx,
408                                    bool pairwise, const u8 *mac_addr);
409 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
410                              size_t ie_len, u16 reason, bool from_ap);
411 void cfg80211_sme_scan_done(struct net_device *dev);
412 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
413 void cfg80211_sme_disassoc(struct net_device *dev,
414                            struct cfg80211_internal_bss *bss);
415 void __cfg80211_scan_done(struct work_struct *wk);
416 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
417 void __cfg80211_sched_scan_results(struct work_struct *wk);
418 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
419                                bool driver_initiated);
420 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
421 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
422                           struct net_device *dev, enum nl80211_iftype ntype,
423                           u32 *flags, struct vif_params *params);
424 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
425 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
426
427 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
428                                  struct wireless_dev *wdev,
429                                  enum nl80211_iftype iftype,
430                                  struct ieee80211_channel *chan,
431                                  enum cfg80211_chan_mode chanmode,
432                                  u8 radar_detect);
433
434 static inline int
435 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
436                               struct wireless_dev *wdev,
437                               enum nl80211_iftype iftype)
438 {
439         return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
440                                             CHAN_MODE_UNDEFINED, 0);
441 }
442
443 static inline int
444 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
445                            enum nl80211_iftype iftype)
446 {
447         return cfg80211_can_change_interface(rdev, NULL, iftype);
448 }
449
450 static inline int
451 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
452                       struct wireless_dev *wdev,
453                       struct ieee80211_channel *chan,
454                       enum cfg80211_chan_mode chanmode)
455 {
456         return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
457                                             chan, chanmode, 0);
458 }
459
460 void
461 cfg80211_get_chan_state(struct wireless_dev *wdev,
462                         struct ieee80211_channel **chan,
463                         enum cfg80211_chan_mode *chanmode);
464
465 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
466                                  struct cfg80211_chan_def *chandef);
467
468 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
469                            const u8 *rates, unsigned int n_rates,
470                            u32 *mask);
471
472 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
473                                  u32 beacon_int);
474
475 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
476                                enum nl80211_iftype iftype, int num);
477
478 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
479
480 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
481 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
482 #else
483 /*
484  * Trick to enable using it as a condition,
485  * and also not give a warning when it's
486  * not used that way.
487  */
488 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
489 #endif
490
491 #endif /* __NET_WIRELESS_CORE_H */