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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  * Copyright (C) 2018-2019 Intel Corporation
  7  */
  8 #ifndef __NET_WIRELESS_CORE_H
  9 #define __NET_WIRELESS_CORE_H
 10 #include <linux/list.h>
 11 #include <linux/netdevice.h>
 12 #include <linux/rbtree.h>
 13 #include <linux/debugfs.h>
 14 #include <linux/rfkill.h>
 15 #include <linux/workqueue.h>
 16 #include <linux/rtnetlink.h>
 17 #include <net/genetlink.h>
 18 #include <net/cfg80211.h>
 19 #include "reg.h"
 20 
 21 
 22 #define WIPHY_IDX_INVALID       -1
 23 
 24 struct cfg80211_registered_device {
 25         const struct cfg80211_ops *ops;
 26         struct list_head list;
 27 
 28         /* rfkill support */
 29         struct rfkill_ops rfkill_ops;
 30         struct rfkill *rfkill;
 31         struct work_struct rfkill_sync;
 32 
 33         /* ISO / IEC 3166 alpha2 for which this device is receiving
 34          * country IEs on, this can help disregard country IEs from APs
 35          * on the same alpha2 quickly. The alpha2 may differ from
 36          * cfg80211_regdomain's alpha2 when an intersection has occurred.
 37          * If the AP is reconfigured this can also be used to tell us if
 38          * the country on the country IE changed. */
 39         char country_ie_alpha2[2];
 40 
 41         /*
 42          * the driver requests the regulatory core to set this regulatory
 43          * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
 44          * devices using the regulatory_set_wiphy_regd() API
 45          */
 46         const struct ieee80211_regdomain *requested_regd;
 47 
 48         /* If a Country IE has been received this tells us the environment
 49          * which its telling us its in. This defaults to ENVIRON_ANY */
 50         enum environment_cap env;
 51 
 52         /* wiphy index, internal only */
 53         int wiphy_idx;
 54 
 55         /* protected by RTNL */
 56         int devlist_generation, wdev_id;
 57         int opencount;
 58         wait_queue_head_t dev_wait;
 59 
 60         struct list_head beacon_registrations;
 61         spinlock_t beacon_registrations_lock;
 62 
 63         struct list_head mlme_unreg;
 64         spinlock_t mlme_unreg_lock;
 65         struct work_struct mlme_unreg_wk;
 66 
 67         /* protected by RTNL only */
 68         int num_running_ifaces;
 69         int num_running_monitor_ifaces;
 70         u64 cookie_counter;
 71 
 72         /* BSSes/scanning */
 73         spinlock_t bss_lock;
 74         struct list_head bss_list;
 75         struct rb_root bss_tree;
 76         u32 bss_generation;
 77         u32 bss_entries;
 78         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
 79         struct sk_buff *scan_msg;
 80         struct list_head sched_scan_req_list;
 81         time64_t suspend_at;
 82         struct work_struct scan_done_wk;
 83 
 84         struct genl_info *cur_cmd_info;
 85 
 86         struct work_struct conn_work;
 87         struct work_struct event_work;
 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         struct cfg80211_coalesce *coalesce;
 95 
 96         struct work_struct destroy_work;
 97         struct work_struct sched_scan_stop_wk;
 98         struct work_struct sched_scan_res_wk;
 99 
100         struct cfg80211_chan_def radar_chandef;
101         struct work_struct propagate_radar_detect_wk;
102 
103         struct cfg80211_chan_def cac_done_chandef;
104         struct work_struct propagate_cac_done_wk;
105 
106         /* must be last because of the way we do wiphy_priv(),
107          * and it should at least be aligned to NETDEV_ALIGN */
108         struct wiphy wiphy __aligned(NETDEV_ALIGN);
109 };
110 
111 static inline
112 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
113 {
114         BUG_ON(!wiphy);
115         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
116 }
117 
118 static inline void
119 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
120 {
121 #ifdef CONFIG_PM
122         int i;
123 
124         if (!rdev->wiphy.wowlan_config)
125                 return;
126         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
127                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
128         kfree(rdev->wiphy.wowlan_config->patterns);
129         if (rdev->wiphy.wowlan_config->tcp &&
130             rdev->wiphy.wowlan_config->tcp->sock)
131                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
132         kfree(rdev->wiphy.wowlan_config->tcp);
133         kfree(rdev->wiphy.wowlan_config->nd_config);
134         kfree(rdev->wiphy.wowlan_config);
135 #endif
136 }
137 
138 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev)
139 {
140         u64 r = ++rdev->cookie_counter;
141 
142         if (WARN_ON(r == 0))
143                 r = ++rdev->cookie_counter;
144 
145         return r;
146 }
147 
148 extern struct workqueue_struct *cfg80211_wq;
149 extern struct list_head cfg80211_rdev_list;
150 extern int cfg80211_rdev_list_generation;
151 
152 struct cfg80211_internal_bss {
153         struct list_head list;
154         struct list_head hidden_list;
155         struct rb_node rbn;
156         u64 ts_boottime;
157         unsigned long ts;
158         unsigned long refcount;
159         atomic_t hold;
160 
161         /* time at the start of the reception of the first octet of the
162          * timestamp field of the last beacon/probe received for this BSS.
163          * The time is the TSF of the BSS specified by %parent_bssid.
164          */
165         u64 parent_tsf;
166 
167         /* the BSS according to which %parent_tsf is set. This is set to
168          * the BSS that the interface that requested the scan was connected to
169          * when the beacon/probe was received.
170          */
171         u8 parent_bssid[ETH_ALEN] __aligned(2);
172 
173         /* must be last because of priv member */
174         struct cfg80211_bss pub;
175 };
176 
177 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
178 {
179         return container_of(pub, struct cfg80211_internal_bss, pub);
180 }
181 
182 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
183 {
184         atomic_inc(&bss->hold);
185         if (bss->pub.transmitted_bss) {
186                 bss = container_of(bss->pub.transmitted_bss,
187                                    struct cfg80211_internal_bss, pub);
188                 atomic_inc(&bss->hold);
189         }
190 }
191 
192 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
193 {
194         int r = atomic_dec_return(&bss->hold);
195         WARN_ON(r < 0);
196         if (bss->pub.transmitted_bss) {
197                 bss = container_of(bss->pub.transmitted_bss,
198                                    struct cfg80211_internal_bss, pub);
199                 r = atomic_dec_return(&bss->hold);
200                 WARN_ON(r < 0);
201         }
202 }
203 
204 
205 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
206 int get_wiphy_idx(struct wiphy *wiphy);
207 
208 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
209 
210 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
211                           struct net *net);
212 
213 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
214                         struct wireless_dev *wdev);
215 
216 static inline void wdev_lock(struct wireless_dev *wdev)
217         __acquires(wdev)
218 {
219         mutex_lock(&wdev->mtx);
220         __acquire(wdev->mtx);
221 }
222 
223 static inline void wdev_unlock(struct wireless_dev *wdev)
224         __releases(wdev)
225 {
226         __release(wdev->mtx);
227         mutex_unlock(&wdev->mtx);
228 }
229 
230 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
231 
232 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
233 {
234         ASSERT_RTNL();
235 
236         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
237                rdev->num_running_ifaces > 0;
238 }
239 
240 enum cfg80211_event_type {
241         EVENT_CONNECT_RESULT,
242         EVENT_ROAMED,
243         EVENT_DISCONNECTED,
244         EVENT_IBSS_JOINED,
245         EVENT_STOPPED,
246         EVENT_PORT_AUTHORIZED,
247 };
248 
249 struct cfg80211_event {
250         struct list_head list;
251         enum cfg80211_event_type type;
252 
253         union {
254                 struct cfg80211_connect_resp_params cr;
255                 struct cfg80211_roam_info rm;
256                 struct {
257                         const u8 *ie;
258                         size_t ie_len;
259                         u16 reason;
260                         bool locally_generated;
261                 } dc;
262                 struct {
263                         u8 bssid[ETH_ALEN];
264                         struct ieee80211_channel *channel;
265                 } ij;
266                 struct {
267                         u8 bssid[ETH_ALEN];
268                 } pa;
269         };
270 };
271 
272 struct cfg80211_cached_keys {
273         struct key_params params[CFG80211_MAX_WEP_KEYS];
274         u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
275         int def;
276 };
277 
278 enum cfg80211_chan_mode {
279         CHAN_MODE_UNDEFINED,
280         CHAN_MODE_SHARED,
281         CHAN_MODE_EXCLUSIVE,
282 };
283 
284 struct cfg80211_beacon_registration {
285         struct list_head list;
286         u32 nlportid;
287 };
288 
289 struct cfg80211_cqm_config {
290         u32 rssi_hyst;
291         s32 last_rssi_event_value;
292         int n_rssi_thresholds;
293         s32 rssi_thresholds[0];
294 };
295 
296 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
297 
298 /* free object */
299 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
300 
301 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
302                         char *newname);
303 
304 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
305 
306 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
307 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
308                       unsigned long age_secs);
309 
310 /* IBSS */
311 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
312                          struct net_device *dev,
313                          struct cfg80211_ibss_params *params,
314                          struct cfg80211_cached_keys *connkeys);
315 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
316 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
317                           struct net_device *dev, bool nowext);
318 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
319                         struct net_device *dev, bool nowext);
320 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
321                             struct ieee80211_channel *channel);
322 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
323                             struct wireless_dev *wdev);
324 
325 /* mesh */
326 extern const struct mesh_config default_mesh_config;
327 extern const struct mesh_setup default_mesh_setup;
328 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
329                          struct net_device *dev,
330                          struct mesh_setup *setup,
331                          const struct mesh_config *conf);
332 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
333                           struct net_device *dev);
334 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
335                         struct net_device *dev);
336 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
337                               struct wireless_dev *wdev,
338                               struct cfg80211_chan_def *chandef);
339 
340 /* OCB */
341 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
342                         struct net_device *dev,
343                         struct ocb_setup *setup);
344 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
345                       struct net_device *dev,
346                       struct ocb_setup *setup);
347 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
348                          struct net_device *dev);
349 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
350                        struct net_device *dev);
351 
352 /* AP */
353 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
354                        struct net_device *dev, bool notify);
355 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
356                      struct net_device *dev, bool notify);
357 
358 /* MLME */
359 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
360                        struct net_device *dev,
361                        struct ieee80211_channel *chan,
362                        enum nl80211_auth_type auth_type,
363                        const u8 *bssid,
364                        const u8 *ssid, int ssid_len,
365                        const u8 *ie, int ie_len,
366                        const u8 *key, int key_len, int key_idx,
367                        const u8 *auth_data, int auth_data_len);
368 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
369                         struct net_device *dev,
370                         struct ieee80211_channel *chan,
371                         const u8 *bssid,
372                         const u8 *ssid, int ssid_len,
373                         struct cfg80211_assoc_request *req);
374 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
375                          struct net_device *dev, const u8 *bssid,
376                          const u8 *ie, int ie_len, u16 reason,
377                          bool local_state_change);
378 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
379                            struct net_device *dev, const u8 *bssid,
380                            const u8 *ie, int ie_len, u16 reason,
381                            bool local_state_change);
382 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
383                         struct net_device *dev);
384 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
385                                 u16 frame_type, const u8 *match_data,
386                                 int match_len);
387 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
388 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
389 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
390 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
391                           struct wireless_dev *wdev,
392                           struct cfg80211_mgmt_tx_params *params,
393                           u64 *cookie);
394 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
395                                const struct ieee80211_ht_cap *ht_capa_mask);
396 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
397                                 const struct ieee80211_vht_cap *vht_capa_mask);
398 
399 /* SME events */
400 int cfg80211_connect(struct cfg80211_registered_device *rdev,
401                      struct net_device *dev,
402                      struct cfg80211_connect_params *connect,
403                      struct cfg80211_cached_keys *connkeys,
404                      const u8 *prev_bssid);
405 void __cfg80211_connect_result(struct net_device *dev,
406                                struct cfg80211_connect_resp_params *params,
407                                bool wextev);
408 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
409                              size_t ie_len, u16 reason, bool from_ap);
410 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
411                         struct net_device *dev, u16 reason,
412                         bool wextev);
413 void __cfg80211_roamed(struct wireless_dev *wdev,
414                        struct cfg80211_roam_info *info);
415 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid);
416 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
417                               struct wireless_dev *wdev);
418 void cfg80211_autodisconnect_wk(struct work_struct *work);
419 
420 /* SME implementation */
421 void cfg80211_conn_work(struct work_struct *work);
422 void cfg80211_sme_scan_done(struct net_device *dev);
423 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
424 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
425 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
426 void cfg80211_sme_deauth(struct wireless_dev *wdev);
427 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
428 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
429 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
430 
431 /* internal helpers */
432 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
433 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
434                                    struct key_params *params, int key_idx,
435                                    bool pairwise, const u8 *mac_addr);
436 void __cfg80211_scan_done(struct work_struct *wk);
437 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
438                            bool send_message);
439 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
440                                  struct cfg80211_sched_scan_request *req);
441 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
442                                      bool want_multi);
443 void cfg80211_sched_scan_results_wk(struct work_struct *work);
444 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
445                                  struct cfg80211_sched_scan_request *req,
446                                  bool driver_initiated);
447 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
448                                u64 reqid, bool driver_initiated);
449 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
450 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
451                           struct net_device *dev, enum nl80211_iftype ntype,
452                           struct vif_params *params);
453 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
454 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
455 
456 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
457                                 u32 center_freq_khz, u32 bw_khz);
458 
459 extern struct work_struct cfg80211_disconnect_work;
460 
461 /**
462  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
463  * @wiphy: the wiphy to validate against
464  * @chandef: the channel definition to check
465  *
466  * Checks if chandef is usable and we can/need start CAC on such channel.
467  *
468  * Return: Return true if all channels available and at least
469  *         one channel require CAC (NL80211_DFS_USABLE)
470  */
471 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
472                                  const struct cfg80211_chan_def *chandef);
473 
474 void cfg80211_set_dfs_state(struct wiphy *wiphy,
475                             const struct cfg80211_chan_def *chandef,
476                             enum nl80211_dfs_state dfs_state);
477 
478 void cfg80211_dfs_channels_update_work(struct work_struct *work);
479 
480 unsigned int
481 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
482                               const struct cfg80211_chan_def *chandef);
483 
484 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
485 
486 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
487                                   struct ieee80211_channel *chan);
488 
489 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
490 
491 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
492                           struct ieee80211_channel *chan);
493 
494 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
495 {
496         unsigned long end = jiffies;
497 
498         if (end >= start)
499                 return jiffies_to_msecs(end - start);
500 
501         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
502 }
503 
504 void
505 cfg80211_get_chan_state(struct wireless_dev *wdev,
506                         struct ieee80211_channel **chan,
507                         enum cfg80211_chan_mode *chanmode,
508                         u8 *radar_detect);
509 
510 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
511                                  struct cfg80211_chan_def *chandef);
512 
513 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
514                            const u8 *rates, unsigned int n_rates,
515                            u32 *mask);
516 
517 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
518                                  enum nl80211_iftype iftype, u32 beacon_int);
519 
520 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
521                                enum nl80211_iftype iftype, int num);
522 
523 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
524                       struct wireless_dev *wdev);
525 void cfg80211_leave(struct cfg80211_registered_device *rdev,
526                     struct wireless_dev *wdev);
527 
528 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
529                               struct wireless_dev *wdev);
530 
531 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
532                        struct wireless_dev *wdev);
533 
534 struct cfg80211_internal_bss *
535 cfg80211_bss_update(struct cfg80211_registered_device *rdev,
536                     struct cfg80211_internal_bss *tmp,
537                     bool signal_valid, unsigned long ts);
538 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
539 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
540 #else
541 /*
542  * Trick to enable using it as a condition,
543  * and also not give a warning when it's
544  * not used that way.
545  */
546 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
547 #endif
548 
549 void cfg80211_cqm_config_free(struct wireless_dev *wdev);
550 
551 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid);
552 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev);
553 void cfg80211_pmsr_free_wk(struct work_struct *work);
554 
555 #endif /* __NET_WIRELESS_CORE_H */
556 

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