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 /*
40 * the driver requests the regulatory core to set this regulatory
41 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
42 * devices using the regulatory_set_wiphy_regd() API
43 */
44 const struct ieee80211_regdomain *requested_regd;
45
46 /* If a Country IE has been received this tells us the environment
47 * which its telling us its in. This defaults to ENVIRON_ANY */
48 enum environment_cap env;
49
50 /* wiphy index, internal only */
51 int wiphy_idx;
52
53 /* protected by RTNL */
54 int devlist_generation, wdev_id;
55 int opencount;
56 wait_queue_head_t dev_wait;
57
58 struct list_head beacon_registrations;
59 spinlock_t beacon_registrations_lock;
60
61 struct list_head mlme_unreg;
62 spinlock_t mlme_unreg_lock;
63 struct work_struct mlme_unreg_wk;
64
65 /* protected by RTNL only */
66 int num_running_ifaces;
67 int num_running_monitor_ifaces;
68
69 /* BSSes/scanning */
70 spinlock_t bss_lock;
71 struct list_head bss_list;
72 struct rb_root bss_tree;
73 u32 bss_generation;
74 u32 bss_entries;
75 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
76 struct sk_buff *scan_msg;
77 struct cfg80211_sched_scan_request __rcu *sched_scan_req;
78 unsigned long suspend_at;
79 struct work_struct scan_done_wk;
80 struct work_struct sched_scan_results_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 spinlock_t destroy_list_lock;
95 struct list_head destroy_list;
96 struct work_struct destroy_work;
97
98 struct work_struct sched_scan_stop_wk;
99
100 /* must be last because of the way we do wiphy_priv(),
101 * and it should at least be aligned to NETDEV_ALIGN */
102 struct wiphy wiphy __aligned(NETDEV_ALIGN);
103 };
104
105 static inline
wiphy_to_rdev(struct wiphy * wiphy)106 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
107 {
108 BUG_ON(!wiphy);
109 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
110 }
111
112 static inline void
cfg80211_rdev_free_wowlan(struct cfg80211_registered_device * rdev)113 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
114 {
115 #ifdef CONFIG_PM
116 int i;
117
118 if (!rdev->wiphy.wowlan_config)
119 return;
120 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
121 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
122 kfree(rdev->wiphy.wowlan_config->patterns);
123 if (rdev->wiphy.wowlan_config->tcp &&
124 rdev->wiphy.wowlan_config->tcp->sock)
125 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
126 kfree(rdev->wiphy.wowlan_config->tcp);
127 kfree(rdev->wiphy.wowlan_config->nd_config);
128 kfree(rdev->wiphy.wowlan_config);
129 #endif
130 }
131
132 extern struct workqueue_struct *cfg80211_wq;
133 extern struct list_head cfg80211_rdev_list;
134 extern int cfg80211_rdev_list_generation;
135
136 struct cfg80211_internal_bss {
137 struct list_head list;
138 struct list_head hidden_list;
139 struct rb_node rbn;
140 u64 ts_boottime;
141 unsigned long ts;
142 unsigned long refcount;
143 atomic_t hold;
144
145 /* time at the start of the reception of the first octet of the
146 * timestamp field of the last beacon/probe received for this BSS.
147 * The time is the TSF of the BSS specified by %parent_bssid.
148 */
149 u64 parent_tsf;
150
151 /* the BSS according to which %parent_tsf is set. This is set to
152 * the BSS that the interface that requested the scan was connected to
153 * when the beacon/probe was received.
154 */
155 u8 parent_bssid[ETH_ALEN] __aligned(2);
156
157 /* must be last because of priv member */
158 struct cfg80211_bss pub;
159 };
160
bss_from_pub(struct cfg80211_bss * pub)161 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
162 {
163 return container_of(pub, struct cfg80211_internal_bss, pub);
164 }
165
cfg80211_hold_bss(struct cfg80211_internal_bss * bss)166 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
167 {
168 atomic_inc(&bss->hold);
169 }
170
cfg80211_unhold_bss(struct cfg80211_internal_bss * bss)171 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
172 {
173 int r = atomic_dec_return(&bss->hold);
174 WARN_ON(r < 0);
175 }
176
177
178 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
179 int get_wiphy_idx(struct wiphy *wiphy);
180
181 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
182
183 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
184 struct net *net);
185
wdev_lock(struct wireless_dev * wdev)186 static inline void wdev_lock(struct wireless_dev *wdev)
187 __acquires(wdev)
188 {
189 mutex_lock(&wdev->mtx);
190 __acquire(wdev->mtx);
191 }
192
wdev_unlock(struct wireless_dev * wdev)193 static inline void wdev_unlock(struct wireless_dev *wdev)
194 __releases(wdev)
195 {
196 __release(wdev->mtx);
197 mutex_unlock(&wdev->mtx);
198 }
199
200 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
201
cfg80211_has_monitors_only(struct cfg80211_registered_device * rdev)202 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
203 {
204 ASSERT_RTNL();
205
206 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
207 rdev->num_running_ifaces > 0;
208 }
209
210 enum cfg80211_event_type {
211 EVENT_CONNECT_RESULT,
212 EVENT_ROAMED,
213 EVENT_DISCONNECTED,
214 EVENT_IBSS_JOINED,
215 EVENT_STOPPED,
216 };
217
218 struct cfg80211_event {
219 struct list_head list;
220 enum cfg80211_event_type type;
221
222 union {
223 struct {
224 u8 bssid[ETH_ALEN];
225 const u8 *req_ie;
226 const u8 *resp_ie;
227 size_t req_ie_len;
228 size_t resp_ie_len;
229 struct cfg80211_bss *bss;
230 int status; /* -1 = failed; 0..65535 = status code */
231 } cr;
232 struct {
233 const u8 *req_ie;
234 const u8 *resp_ie;
235 size_t req_ie_len;
236 size_t resp_ie_len;
237 struct cfg80211_bss *bss;
238 } rm;
239 struct {
240 const u8 *ie;
241 size_t ie_len;
242 u16 reason;
243 bool locally_generated;
244 } dc;
245 struct {
246 u8 bssid[ETH_ALEN];
247 struct ieee80211_channel *channel;
248 } ij;
249 };
250 };
251
252 struct cfg80211_cached_keys {
253 struct key_params params[CFG80211_MAX_WEP_KEYS];
254 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
255 int def;
256 };
257
258 enum cfg80211_chan_mode {
259 CHAN_MODE_UNDEFINED,
260 CHAN_MODE_SHARED,
261 CHAN_MODE_EXCLUSIVE,
262 };
263
264 struct cfg80211_beacon_registration {
265 struct list_head list;
266 u32 nlportid;
267 };
268
269 struct cfg80211_iface_destroy {
270 struct list_head list;
271 u32 nlportid;
272 };
273
274 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
275
276 /* free object */
277 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
278
279 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
280 char *newname);
281
282 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
283
284 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
285 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
286 unsigned long age_secs);
287
288 /* IBSS */
289 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
290 struct net_device *dev,
291 struct cfg80211_ibss_params *params,
292 struct cfg80211_cached_keys *connkeys);
293 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
294 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
295 struct net_device *dev, bool nowext);
296 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
297 struct net_device *dev, bool nowext);
298 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
299 struct ieee80211_channel *channel);
300 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
301 struct wireless_dev *wdev);
302
303 /* mesh */
304 extern const struct mesh_config default_mesh_config;
305 extern const struct mesh_setup default_mesh_setup;
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_join_mesh(struct cfg80211_registered_device *rdev,
311 struct net_device *dev,
312 struct mesh_setup *setup,
313 const struct mesh_config *conf);
314 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
315 struct net_device *dev);
316 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
317 struct net_device *dev);
318 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
319 struct wireless_dev *wdev,
320 struct cfg80211_chan_def *chandef);
321
322 /* OCB */
323 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
324 struct net_device *dev,
325 struct ocb_setup *setup);
326 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
327 struct net_device *dev,
328 struct ocb_setup *setup);
329 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
330 struct net_device *dev);
331 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
332 struct net_device *dev);
333
334 /* AP */
335 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
336 struct net_device *dev, bool notify);
337 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
338 struct net_device *dev, bool notify);
339
340 /* MLME */
341 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
342 struct net_device *dev,
343 struct ieee80211_channel *chan,
344 enum nl80211_auth_type auth_type,
345 const u8 *bssid,
346 const u8 *ssid, int ssid_len,
347 const u8 *ie, int ie_len,
348 const u8 *key, int key_len, int key_idx,
349 const u8 *sae_data, int sae_data_len);
350 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
351 struct net_device *dev,
352 struct ieee80211_channel *chan,
353 const u8 *bssid,
354 const u8 *ssid, int ssid_len,
355 struct cfg80211_assoc_request *req);
356 int cfg80211_mlme_deauth(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 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
361 struct net_device *dev, const u8 *bssid,
362 const u8 *ie, int ie_len, u16 reason,
363 bool local_state_change);
364 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
365 struct net_device *dev);
366 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
367 u16 frame_type, const u8 *match_data,
368 int match_len);
369 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
370 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
371 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
372 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
373 struct wireless_dev *wdev,
374 struct cfg80211_mgmt_tx_params *params,
375 u64 *cookie);
376 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
377 const struct ieee80211_ht_cap *ht_capa_mask);
378 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
379 const struct ieee80211_vht_cap *vht_capa_mask);
380
381 /* SME events */
382 int 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);
387 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
388 const u8 *req_ie, size_t req_ie_len,
389 const u8 *resp_ie, size_t resp_ie_len,
390 int status, bool wextev,
391 struct cfg80211_bss *bss);
392 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
393 size_t ie_len, u16 reason, bool from_ap);
394 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
395 struct net_device *dev, u16 reason,
396 bool wextev);
397 void __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);
401 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
402 struct wireless_dev *wdev);
403
404 /* SME implementation */
405 void cfg80211_conn_work(struct work_struct *work);
406 void cfg80211_sme_scan_done(struct net_device *dev);
407 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
408 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
409 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
410 void cfg80211_sme_deauth(struct wireless_dev *wdev);
411 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
412 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
413 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
414
415 /* internal helpers */
416 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
417 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
418 struct key_params *params, int key_idx,
419 bool pairwise, const u8 *mac_addr);
420 void __cfg80211_scan_done(struct work_struct *wk);
421 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
422 bool send_message);
423 void __cfg80211_sched_scan_results(struct work_struct *wk);
424 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
425 bool driver_initiated);
426 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
427 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
428 struct net_device *dev, enum nl80211_iftype ntype,
429 u32 *flags, struct vif_params *params);
430 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
431 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
432
433 /**
434 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
435 * @wiphy: the wiphy to validate against
436 * @chandef: the channel definition to check
437 *
438 * Checks if chandef is usable and we can/need start CAC on such channel.
439 *
440 * Return: Return true if all channels available and at least
441 * one channel require CAC (NL80211_DFS_USABLE)
442 */
443 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
444 const struct cfg80211_chan_def *chandef);
445
446 void cfg80211_set_dfs_state(struct wiphy *wiphy,
447 const struct cfg80211_chan_def *chandef,
448 enum nl80211_dfs_state dfs_state);
449
450 void cfg80211_dfs_channels_update_work(struct work_struct *work);
451
452 unsigned int
453 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
454 const struct cfg80211_chan_def *chandef);
455
elapsed_jiffies_msecs(unsigned long start)456 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
457 {
458 unsigned long end = jiffies;
459
460 if (end >= start)
461 return jiffies_to_msecs(end - start);
462
463 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
464 }
465
466 void
467 cfg80211_get_chan_state(struct wireless_dev *wdev,
468 struct ieee80211_channel **chan,
469 enum cfg80211_chan_mode *chanmode,
470 u8 *radar_detect);
471
472 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
473 struct cfg80211_chan_def *chandef);
474
475 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
476 const u8 *rates, unsigned int n_rates,
477 u32 *mask);
478
479 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
480 u32 beacon_int);
481
482 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
483 enum nl80211_iftype iftype, int num);
484
485 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
486 struct wireless_dev *wdev);
487 void cfg80211_leave(struct cfg80211_registered_device *rdev,
488 struct wireless_dev *wdev);
489
490 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
491 struct wireless_dev *wdev);
492
493 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
494 struct wireless_dev *wdev);
495
496 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
497
498 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
499 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
500 #else
501 /*
502 * Trick to enable using it as a condition,
503 * and also not give a warning when it's
504 * not used that way.
505 */
506 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
507 #endif
508
509 #endif /* __NET_WIRELESS_CORE_H */
510