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

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * Wireless configuration interface internals.
  4  *
  5  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
  6  */
  7 #ifndef __NET_WIRELESS_CORE_H
  8 #define __NET_WIRELESS_CORE_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 
 27         /* rfkill support */
 28         struct rfkill_ops rfkill_ops;
 29         struct rfkill *rfkill;
 30         struct work_struct rfkill_sync;
 31 
 32         /* ISO / IEC 3166 alpha2 for which this device is receiving
 33          * country IEs on, this can help disregard country IEs from APs
 34          * on the same alpha2 quickly. The alpha2 may differ from
 35          * cfg80211_regdomain's alpha2 when an intersection has occurred.
 36          * If the AP is reconfigured this can also be used to tell us if
 37          * the country on the country IE changed. */
 38         char country_ie_alpha2[2];
 39 
 40         /*
 41          * the driver requests the regulatory core to set this regulatory
 42          * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
 43          * devices using the regulatory_set_wiphy_regd() API
 44          */
 45         const struct ieee80211_regdomain *requested_regd;
 46 
 47         /* If a Country IE has been received this tells us the environment
 48          * which its telling us its in. This defaults to ENVIRON_ANY */
 49         enum environment_cap env;
 50 
 51         /* wiphy index, internal only */
 52         int wiphy_idx;
 53 
 54         /* protected by RTNL */
 55         int devlist_generation, wdev_id;
 56         int opencount;
 57         wait_queue_head_t dev_wait;
 58 
 59         struct list_head beacon_registrations;
 60         spinlock_t beacon_registrations_lock;
 61 
 62         struct list_head mlme_unreg;
 63         spinlock_t mlme_unreg_lock;
 64         struct work_struct mlme_unreg_wk;
 65 
 66         /* protected by RTNL only */
 67         int num_running_ifaces;
 68         int num_running_monitor_ifaces;
 69 
 70         /* BSSes/scanning */
 71         spinlock_t bss_lock;
 72         struct list_head bss_list;
 73         struct rb_root bss_tree;
 74         u32 bss_generation;
 75         u32 bss_entries;
 76         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
 77         struct sk_buff *scan_msg;
 78         struct list_head sched_scan_req_list;
 79         unsigned long suspend_at;
 80         struct work_struct scan_done_wk;
 81 
 82         struct genl_info *cur_cmd_info;
 83 
 84         struct work_struct conn_work;
 85         struct work_struct event_work;
 86 
 87         struct delayed_work dfs_update_channels_wk;
 88 
 89         /* netlink port which started critical protocol (0 means not started) */
 90         u32 crit_proto_nlportid;
 91 
 92         struct cfg80211_coalesce *coalesce;
 93 
 94         struct work_struct destroy_work;
 95         struct work_struct sched_scan_stop_wk;
 96         struct work_struct sched_scan_res_wk;
 97 
 98         struct cfg80211_chan_def radar_chandef;
 99         struct work_struct propagate_radar_detect_wk;
100 
101         struct cfg80211_chan_def cac_done_chandef;
102         struct work_struct propagate_cac_done_wk;
103 
104         /* must be last because of the way we do wiphy_priv(),
105          * and it should at least be aligned to NETDEV_ALIGN */
106         struct wiphy wiphy __aligned(NETDEV_ALIGN);
107 };
108 
109 static inline
110 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
111 {
112         BUG_ON(!wiphy);
113         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
114 }
115 
116 static inline void
117 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
118 {
119 #ifdef CONFIG_PM
120         int i;
121 
122         if (!rdev->wiphy.wowlan_config)
123                 return;
124         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
125                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
126         kfree(rdev->wiphy.wowlan_config->patterns);
127         if (rdev->wiphy.wowlan_config->tcp &&
128             rdev->wiphy.wowlan_config->tcp->sock)
129                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
130         kfree(rdev->wiphy.wowlan_config->tcp);
131         kfree(rdev->wiphy.wowlan_config->nd_config);
132         kfree(rdev->wiphy.wowlan_config);
133 #endif
134 }
135 
136 extern struct workqueue_struct *cfg80211_wq;
137 extern struct list_head cfg80211_rdev_list;
138 extern int cfg80211_rdev_list_generation;
139 
140 struct cfg80211_internal_bss {
141         struct list_head list;
142         struct list_head hidden_list;
143         struct rb_node rbn;
144         u64 ts_boottime;
145         unsigned long ts;
146         unsigned long refcount;
147         atomic_t hold;
148 
149         /* time at the start of the reception of the first octet of the
150          * timestamp field of the last beacon/probe received for this BSS.
151          * The time is the TSF of the BSS specified by %parent_bssid.
152          */
153         u64 parent_tsf;
154 
155         /* the BSS according to which %parent_tsf is set. This is set to
156          * the BSS that the interface that requested the scan was connected to
157          * when the beacon/probe was received.
158          */
159         u8 parent_bssid[ETH_ALEN] __aligned(2);
160 
161         /* must be last because of priv member */
162         struct cfg80211_bss pub;
163 };
164 
165 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
166 {
167         return container_of(pub, struct cfg80211_internal_bss, pub);
168 }
169 
170 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
171 {
172         atomic_inc(&bss->hold);
173 }
174 
175 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
176 {
177         int r = atomic_dec_return(&bss->hold);
178         WARN_ON(r < 0);
179 }
180 
181 
182 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
183 int get_wiphy_idx(struct wiphy *wiphy);
184 
185 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
186 
187 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
188                           struct net *net);
189 
190 static inline void wdev_lock(struct wireless_dev *wdev)
191         __acquires(wdev)
192 {
193         mutex_lock(&wdev->mtx);
194         __acquire(wdev->mtx);
195 }
196 
197 static inline void wdev_unlock(struct wireless_dev *wdev)
198         __releases(wdev)
199 {
200         __release(wdev->mtx);
201         mutex_unlock(&wdev->mtx);
202 }
203 
204 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
205 
206 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
207 {
208         ASSERT_RTNL();
209 
210         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
211                rdev->num_running_ifaces > 0;
212 }
213 
214 enum cfg80211_event_type {
215         EVENT_CONNECT_RESULT,
216         EVENT_ROAMED,
217         EVENT_DISCONNECTED,
218         EVENT_IBSS_JOINED,
219         EVENT_STOPPED,
220         EVENT_PORT_AUTHORIZED,
221 };
222 
223 struct cfg80211_event {
224         struct list_head list;
225         enum cfg80211_event_type type;
226 
227         union {
228                 struct cfg80211_connect_resp_params cr;
229                 struct cfg80211_roam_info rm;
230                 struct {
231                         const u8 *ie;
232                         size_t ie_len;
233                         u16 reason;
234                         bool locally_generated;
235                 } dc;
236                 struct {
237                         u8 bssid[ETH_ALEN];
238                         struct ieee80211_channel *channel;
239                 } ij;
240                 struct {
241                         u8 bssid[ETH_ALEN];
242                 } pa;
243         };
244 };
245 
246 struct cfg80211_cached_keys {
247         struct key_params params[CFG80211_MAX_WEP_KEYS];
248         u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
249         int def;
250 };
251 
252 enum cfg80211_chan_mode {
253         CHAN_MODE_UNDEFINED,
254         CHAN_MODE_SHARED,
255         CHAN_MODE_EXCLUSIVE,
256 };
257 
258 struct cfg80211_beacon_registration {
259         struct list_head list;
260         u32 nlportid;
261 };
262 
263 struct cfg80211_cqm_config {
264         u32 rssi_hyst;
265         s32 last_rssi_event_value;
266         int n_rssi_thresholds;
267         s32 rssi_thresholds[0];
268 };
269 
270 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
271 
272 /* free object */
273 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
274 
275 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
276                         char *newname);
277 
278 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
279 
280 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
281 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
282                       unsigned long age_secs);
283 
284 /* IBSS */
285 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
286                        struct net_device *dev,
287                        struct cfg80211_ibss_params *params,
288                        struct cfg80211_cached_keys *connkeys);
289 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
290 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
291                           struct net_device *dev, bool nowext);
292 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
293                         struct net_device *dev, bool nowext);
294 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
295                             struct ieee80211_channel *channel);
296 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
297                             struct wireless_dev *wdev);
298 
299 /* mesh */
300 extern const struct mesh_config default_mesh_config;
301 extern const struct mesh_setup default_mesh_setup;
302 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
303                          struct net_device *dev,
304                          struct mesh_setup *setup,
305                          const struct mesh_config *conf);
306 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
307                        struct net_device *dev,
308                        struct mesh_setup *setup,
309                        const struct mesh_config *conf);
310 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
311                           struct net_device *dev);
312 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
313                         struct net_device *dev);
314 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
315                               struct wireless_dev *wdev,
316                               struct cfg80211_chan_def *chandef);
317 
318 /* OCB */
319 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
320                         struct net_device *dev,
321                         struct ocb_setup *setup);
322 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
323                       struct net_device *dev,
324                       struct ocb_setup *setup);
325 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
326                          struct net_device *dev);
327 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
328                        struct net_device *dev);
329 
330 /* AP */
331 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
332                        struct net_device *dev, bool notify);
333 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
334                      struct net_device *dev, bool notify);
335 
336 /* MLME */
337 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
338                        struct net_device *dev,
339                        struct ieee80211_channel *chan,
340                        enum nl80211_auth_type auth_type,
341                        const u8 *bssid,
342                        const u8 *ssid, int ssid_len,
343                        const u8 *ie, int ie_len,
344                        const u8 *key, int key_len, int key_idx,
345                        const u8 *auth_data, int auth_data_len);
346 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
347                         struct net_device *dev,
348                         struct ieee80211_channel *chan,
349                         const u8 *bssid,
350                         const u8 *ssid, int ssid_len,
351                         struct cfg80211_assoc_request *req);
352 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
353                          struct net_device *dev, const u8 *bssid,
354                          const u8 *ie, int ie_len, u16 reason,
355                          bool local_state_change);
356 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
357                            struct net_device *dev, const u8 *bssid,
358                            const u8 *ie, int ie_len, u16 reason,
359                            bool local_state_change);
360 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
361                         struct net_device *dev);
362 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
363                                 u16 frame_type, const u8 *match_data,
364                                 int match_len);
365 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
366 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
367 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
368 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
369                           struct wireless_dev *wdev,
370                           struct cfg80211_mgmt_tx_params *params,
371                           u64 *cookie);
372 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
373                                const struct ieee80211_ht_cap *ht_capa_mask);
374 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
375                                 const struct ieee80211_vht_cap *vht_capa_mask);
376 
377 /* SME events */
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 void __cfg80211_connect_result(struct net_device *dev,
384                                struct cfg80211_connect_resp_params *params,
385                                bool wextev);
386 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
387                              size_t ie_len, u16 reason, bool from_ap);
388 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
389                         struct net_device *dev, u16 reason,
390                         bool wextev);
391 void __cfg80211_roamed(struct wireless_dev *wdev,
392                        struct cfg80211_roam_info *info);
393 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid);
394 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
395                               struct wireless_dev *wdev);
396 void cfg80211_autodisconnect_wk(struct work_struct *work);
397 
398 /* SME implementation */
399 void cfg80211_conn_work(struct work_struct *work);
400 void cfg80211_sme_scan_done(struct net_device *dev);
401 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
402 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
403 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
404 void cfg80211_sme_deauth(struct wireless_dev *wdev);
405 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
406 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
407 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
408 
409 /* internal helpers */
410 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
411 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
412                                    struct key_params *params, int key_idx,
413                                    bool pairwise, const u8 *mac_addr);
414 void __cfg80211_scan_done(struct work_struct *wk);
415 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
416                            bool send_message);
417 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
418                                  struct cfg80211_sched_scan_request *req);
419 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
420                                      bool want_multi);
421 void cfg80211_sched_scan_results_wk(struct work_struct *work);
422 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
423                                  struct cfg80211_sched_scan_request *req,
424                                  bool driver_initiated);
425 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
426                                u64 reqid, bool driver_initiated);
427 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
428 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
429                           struct net_device *dev, enum nl80211_iftype ntype,
430                           struct vif_params *params);
431 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
432 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
433 
434 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
435                                 u32 center_freq_khz, u32 bw_khz);
436 
437 /**
438  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
439  * @wiphy: the wiphy to validate against
440  * @chandef: the channel definition to check
441  *
442  * Checks if chandef is usable and we can/need start CAC on such channel.
443  *
444  * Return: Return true if all channels available and at least
445  *         one channel require CAC (NL80211_DFS_USABLE)
446  */
447 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
448                                  const struct cfg80211_chan_def *chandef);
449 
450 void cfg80211_set_dfs_state(struct wiphy *wiphy,
451                             const struct cfg80211_chan_def *chandef,
452                             enum nl80211_dfs_state dfs_state);
453 
454 void cfg80211_dfs_channels_update_work(struct work_struct *work);
455 
456 unsigned int
457 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
458                               const struct cfg80211_chan_def *chandef);
459 
460 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
461 
462 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
463                                   struct ieee80211_channel *chan);
464 
465 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
466 
467 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
468                           struct ieee80211_channel *chan);
469 
470 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
471 {
472         unsigned long end = jiffies;
473 
474         if (end >= start)
475                 return jiffies_to_msecs(end - start);
476 
477         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
478 }
479 
480 void
481 cfg80211_get_chan_state(struct wireless_dev *wdev,
482                         struct ieee80211_channel **chan,
483                         enum cfg80211_chan_mode *chanmode,
484                         u8 *radar_detect);
485 
486 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
487                                  struct cfg80211_chan_def *chandef);
488 
489 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
490                            const u8 *rates, unsigned int n_rates,
491                            u32 *mask);
492 
493 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
494                                  enum nl80211_iftype iftype, u32 beacon_int);
495 
496 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
497                                enum nl80211_iftype iftype, int num);
498 
499 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
500                       struct wireless_dev *wdev);
501 void cfg80211_leave(struct cfg80211_registered_device *rdev,
502                     struct wireless_dev *wdev);
503 
504 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
505                               struct wireless_dev *wdev);
506 
507 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
508                        struct wireless_dev *wdev);
509 
510 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
511 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
512 #else
513 /*
514  * Trick to enable using it as a condition,
515  * and also not give a warning when it's
516  * not used that way.
517  */
518 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
519 #endif
520 
521 void cfg80211_cqm_config_free(struct wireless_dev *wdev);
522 
523 #endif /* __NET_WIRELESS_CORE_H */
524 

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