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TOMOYO Linux Cross Reference
Linux/net/wireless/core.h

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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/list.h>
  9 #include <linux/netdevice.h>
 10 #include <linux/rbtree.h>
 11 #include <linux/debugfs.h>
 12 #include <linux/rfkill.h>
 13 #include <linux/workqueue.h>
 14 #include <linux/rtnetlink.h>
 15 #include <net/genetlink.h>
 16 #include <net/cfg80211.h>
 17 #include "reg.h"
 18 
 19 
 20 #define WIPHY_IDX_INVALID       -1
 21 
 22 struct cfg80211_registered_device {
 23         const struct cfg80211_ops *ops;
 24         struct list_head list;
 25 
 26         /* rfkill support */
 27         struct rfkill_ops rfkill_ops;
 28         struct rfkill *rfkill;
 29         struct work_struct rfkill_sync;
 30 
 31         /* ISO / IEC 3166 alpha2 for which this device is receiving
 32          * country IEs on, this can help disregard country IEs from APs
 33          * on the same alpha2 quickly. The alpha2 may differ from
 34          * cfg80211_regdomain's alpha2 when an intersection has occurred.
 35          * If the AP is reconfigured this can also be used to tell us if
 36          * the country on the country IE changed. */
 37         char country_ie_alpha2[2];
 38 
 39         /* If a Country IE has been received this tells us the environment
 40          * which its telling us its in. This defaults to ENVIRON_ANY */
 41         enum environment_cap env;
 42 
 43         /* wiphy index, internal only */
 44         int wiphy_idx;
 45 
 46         /* associated wireless interfaces, protected by rtnl or RCU */
 47         struct list_head wdev_list;
 48         int devlist_generation, wdev_id;
 49         int opencount; /* also protected by devlist_mtx */
 50         wait_queue_head_t dev_wait;
 51 
 52         struct list_head beacon_registrations;
 53         spinlock_t beacon_registrations_lock;
 54 
 55         /* protected by RTNL only */
 56         int num_running_ifaces;
 57         int num_running_monitor_ifaces;
 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 sk_buff *scan_msg;
 66         struct cfg80211_sched_scan_request *sched_scan_req;
 67         unsigned long suspend_at;
 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;
 74         struct work_struct event_work;
 75 
 76         struct delayed_work dfs_update_channels_wk;
 77 
 78         /* netlink port which started critical protocol (0 means not started) */
 79         u32 crit_proto_nlportid;
 80 
 81         struct cfg80211_coalesce *coalesce;
 82 
 83         /* must be last because of the way we do wiphy_priv(),
 84          * and it should at least be aligned to NETDEV_ALIGN */
 85         struct wiphy wiphy __aligned(NETDEV_ALIGN);
 86 };
 87 
 88 static inline
 89 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
 90 {
 91         BUG_ON(!wiphy);
 92         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 93 }
 94 
 95 static inline void
 96 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 97 {
 98 #ifdef CONFIG_PM
 99         int i;
100 
101         if (!rdev->wiphy.wowlan_config)
102                 return;
103         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
104                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
105         kfree(rdev->wiphy.wowlan_config->patterns);
106         if (rdev->wiphy.wowlan_config->tcp &&
107             rdev->wiphy.wowlan_config->tcp->sock)
108                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
109         kfree(rdev->wiphy.wowlan_config->tcp);
110         kfree(rdev->wiphy.wowlan_config);
111 #endif
112 }
113 
114 extern struct workqueue_struct *cfg80211_wq;
115 extern struct list_head cfg80211_rdev_list;
116 extern int cfg80211_rdev_list_generation;
117 
118 struct cfg80211_internal_bss {
119         struct list_head list;
120         struct list_head hidden_list;
121         struct rb_node rbn;
122         unsigned long ts;
123         unsigned long refcount;
124         atomic_t hold;
125 
126         /* must be last because of priv member */
127         struct cfg80211_bss pub;
128 };
129 
130 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
131 {
132         return container_of(pub, struct cfg80211_internal_bss, pub);
133 }
134 
135 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
136 {
137         atomic_inc(&bss->hold);
138 }
139 
140 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
141 {
142         int r = atomic_dec_return(&bss->hold);
143         WARN_ON(r < 0);
144 }
145 
146 
147 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
148 int get_wiphy_idx(struct wiphy *wiphy);
149 
150 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
151 
152 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
153                           struct net *net);
154 
155 static inline void wdev_lock(struct wireless_dev *wdev)
156         __acquires(wdev)
157 {
158         mutex_lock(&wdev->mtx);
159         __acquire(wdev->mtx);
160 }
161 
162 static inline void wdev_unlock(struct wireless_dev *wdev)
163         __releases(wdev)
164 {
165         __release(wdev->mtx);
166         mutex_unlock(&wdev->mtx);
167 }
168 
169 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
170 
171 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
172 {
173         ASSERT_RTNL();
174 
175         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
176                rdev->num_running_ifaces > 0;
177 }
178 
179 enum cfg80211_event_type {
180         EVENT_CONNECT_RESULT,
181         EVENT_ROAMED,
182         EVENT_DISCONNECTED,
183         EVENT_IBSS_JOINED,
184 };
185 
186 struct cfg80211_event {
187         struct list_head list;
188         enum cfg80211_event_type type;
189 
190         union {
191                 struct {
192                         u8 bssid[ETH_ALEN];
193                         const u8 *req_ie;
194                         const u8 *resp_ie;
195                         size_t req_ie_len;
196                         size_t resp_ie_len;
197                         u16 status;
198                 } cr;
199                 struct {
200                         const u8 *req_ie;
201                         const u8 *resp_ie;
202                         size_t req_ie_len;
203                         size_t resp_ie_len;
204                         struct cfg80211_bss *bss;
205                 } rm;
206                 struct {
207                         const u8 *ie;
208                         size_t ie_len;
209                         u16 reason;
210                 } dc;
211                 struct {
212                         u8 bssid[ETH_ALEN];
213                         struct ieee80211_channel *channel;
214                 } ij;
215         };
216 };
217 
218 struct cfg80211_cached_keys {
219         struct key_params params[6];
220         u8 data[6][WLAN_MAX_KEY_LEN];
221         int def, defmgmt;
222 };
223 
224 enum cfg80211_chan_mode {
225         CHAN_MODE_UNDEFINED,
226         CHAN_MODE_SHARED,
227         CHAN_MODE_EXCLUSIVE,
228 };
229 
230 struct cfg80211_beacon_registration {
231         struct list_head list;
232         u32 nlportid;
233 };
234 
235 /* free object */
236 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
237 
238 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
239                         char *newname);
240 
241 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
242 
243 void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
244 void cfg80211_bss_age(struct cfg80211_registered_device *dev,
245                       unsigned long age_secs);
246 
247 /* IBSS */
248 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
249                        struct net_device *dev,
250                        struct cfg80211_ibss_params *params,
251                        struct cfg80211_cached_keys *connkeys);
252 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
253 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
254                           struct net_device *dev, bool nowext);
255 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
256                         struct net_device *dev, bool nowext);
257 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
258                             struct ieee80211_channel *channel);
259 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
260                             struct wireless_dev *wdev);
261 
262 /* mesh */
263 extern const struct mesh_config default_mesh_config;
264 extern const struct mesh_setup default_mesh_setup;
265 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
266                          struct net_device *dev,
267                          struct mesh_setup *setup,
268                          const struct mesh_config *conf);
269 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
270                        struct net_device *dev,
271                        struct mesh_setup *setup,
272                        const struct mesh_config *conf);
273 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
274                         struct net_device *dev);
275 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
276                               struct wireless_dev *wdev,
277                               struct cfg80211_chan_def *chandef);
278 
279 /* AP */
280 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
281                      struct net_device *dev, bool notify);
282 
283 /* MLME */
284 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
285                        struct net_device *dev,
286                        struct ieee80211_channel *chan,
287                        enum nl80211_auth_type auth_type,
288                        const u8 *bssid,
289                        const u8 *ssid, int ssid_len,
290                        const u8 *ie, int ie_len,
291                        const u8 *key, int key_len, int key_idx,
292                        const u8 *sae_data, int sae_data_len);
293 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
294                         struct net_device *dev,
295                         struct ieee80211_channel *chan,
296                         const u8 *bssid,
297                         const u8 *ssid, int ssid_len,
298                         struct cfg80211_assoc_request *req);
299 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
300                          struct net_device *dev, const u8 *bssid,
301                          const u8 *ie, int ie_len, u16 reason,
302                          bool local_state_change);
303 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
304                            struct net_device *dev, const u8 *bssid,
305                            const u8 *ie, int ie_len, u16 reason,
306                            bool local_state_change);
307 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
308                         struct net_device *dev);
309 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
310                                 u16 frame_type, const u8 *match_data,
311                                 int match_len);
312 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
313 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
314 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
315                           struct wireless_dev *wdev,
316                           struct cfg80211_mgmt_tx_params *params,
317                           u64 *cookie);
318 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
319                                const struct ieee80211_ht_cap *ht_capa_mask);
320 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
321                                 const struct ieee80211_vht_cap *vht_capa_mask);
322 
323 /* SME events */
324 int cfg80211_connect(struct cfg80211_registered_device *rdev,
325                      struct net_device *dev,
326                      struct cfg80211_connect_params *connect,
327                      struct cfg80211_cached_keys *connkeys,
328                      const u8 *prev_bssid);
329 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
330                                const u8 *req_ie, size_t req_ie_len,
331                                const u8 *resp_ie, size_t resp_ie_len,
332                                u16 status, bool wextev,
333                                struct cfg80211_bss *bss);
334 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
335                              size_t ie_len, u16 reason, bool from_ap);
336 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
337                         struct net_device *dev, u16 reason,
338                         bool wextev);
339 void __cfg80211_roamed(struct wireless_dev *wdev,
340                        struct cfg80211_bss *bss,
341                        const u8 *req_ie, size_t req_ie_len,
342                        const u8 *resp_ie, size_t resp_ie_len);
343 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
344                               struct wireless_dev *wdev);
345 
346 /* SME implementation */
347 void cfg80211_conn_work(struct work_struct *work);
348 void cfg80211_sme_scan_done(struct net_device *dev);
349 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
350 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
351 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
352 void cfg80211_sme_deauth(struct wireless_dev *wdev);
353 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
354 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
355 
356 /* internal helpers */
357 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
358 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
359                                    struct key_params *params, int key_idx,
360                                    bool pairwise, const u8 *mac_addr);
361 void __cfg80211_scan_done(struct work_struct *wk);
362 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
363                            bool send_message);
364 void __cfg80211_sched_scan_results(struct work_struct *wk);
365 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
366                                bool driver_initiated);
367 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
368 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
369                           struct net_device *dev, enum nl80211_iftype ntype,
370                           u32 *flags, struct vif_params *params);
371 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
372 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
373 
374 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
375                                  struct wireless_dev *wdev,
376                                  enum nl80211_iftype iftype,
377                                  struct ieee80211_channel *chan,
378                                  enum cfg80211_chan_mode chanmode,
379                                  u8 radar_detect);
380 
381 /**
382  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
383  * @wiphy: the wiphy to validate against
384  * @chandef: the channel definition to check
385  *
386  * Checks if chandef is usable and we can/need start CAC on such channel.
387  *
388  * Return: Return true if all channels available and at least
389  *         one channel require CAC (NL80211_DFS_USABLE)
390  */
391 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
392                                  const struct cfg80211_chan_def *chandef);
393 
394 void cfg80211_set_dfs_state(struct wiphy *wiphy,
395                             const struct cfg80211_chan_def *chandef,
396                             enum nl80211_dfs_state dfs_state);
397 
398 void cfg80211_dfs_channels_update_work(struct work_struct *work);
399 
400 unsigned int
401 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
402                               const struct cfg80211_chan_def *chandef);
403 
404 static inline int
405 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
406                               struct wireless_dev *wdev,
407                               enum nl80211_iftype iftype)
408 {
409         return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
410                                             CHAN_MODE_UNDEFINED, 0);
411 }
412 
413 static inline int
414 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
415                            enum nl80211_iftype iftype)
416 {
417         if (rfkill_blocked(rdev->rfkill))
418                 return -ERFKILL;
419 
420         return cfg80211_can_change_interface(rdev, NULL, iftype);
421 }
422 
423 static inline int
424 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
425                       struct wireless_dev *wdev,
426                       struct ieee80211_channel *chan,
427                       enum cfg80211_chan_mode chanmode)
428 {
429         return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
430                                             chan, chanmode, 0);
431 }
432 
433 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
434 {
435         unsigned long end = jiffies;
436 
437         if (end >= start)
438                 return jiffies_to_msecs(end - start);
439 
440         return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
441 }
442 
443 void
444 cfg80211_get_chan_state(struct wireless_dev *wdev,
445                         struct ieee80211_channel **chan,
446                         enum cfg80211_chan_mode *chanmode,
447                         u8 *radar_detect);
448 
449 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
450                                  struct cfg80211_chan_def *chandef);
451 
452 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
453                            const u8 *rates, unsigned int n_rates,
454                            u32 *mask);
455 
456 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
457                                  u32 beacon_int);
458 
459 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
460                                enum nl80211_iftype iftype, int num);
461 
462 void cfg80211_leave(struct cfg80211_registered_device *rdev,
463                     struct wireless_dev *wdev);
464 
465 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
466                               struct wireless_dev *wdev);
467 
468 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
469 
470 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
471 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
472 #else
473 /*
474  * Trick to enable using it as a condition,
475  * and also not give a warning when it's
476  * not used that way.
477  */
478 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
479 #endif
480 
481 #endif /* __NET_WIRELESS_CORE_H */
482 

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