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 spinlock_t destroy_list_lock;
84 struct list_head destroy_list;
85 struct work_struct destroy_work;
86
87 struct work_struct sched_scan_stop_wk;
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
wiphy_to_rdev(struct wiphy * wiphy)95 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
96 {
97 BUG_ON(!wiphy);
98 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
99 }
100
101 static inline void
cfg80211_rdev_free_wowlan(struct cfg80211_registered_device * rdev)102 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
103 {
104 #ifdef CONFIG_PM
105 int i;
106
107 if (!rdev->wiphy.wowlan_config)
108 return;
109 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
110 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
111 kfree(rdev->wiphy.wowlan_config->patterns);
112 if (rdev->wiphy.wowlan_config->tcp &&
113 rdev->wiphy.wowlan_config->tcp->sock)
114 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
115 kfree(rdev->wiphy.wowlan_config->tcp);
116 kfree(rdev->wiphy.wowlan_config);
117 #endif
118 }
119
120 extern struct workqueue_struct *cfg80211_wq;
121 extern struct list_head cfg80211_rdev_list;
122 extern int cfg80211_rdev_list_generation;
123
124 struct cfg80211_internal_bss {
125 struct list_head list;
126 struct list_head hidden_list;
127 struct rb_node rbn;
128 unsigned long ts;
129 unsigned long refcount;
130 atomic_t hold;
131
132 /* must be last because of priv member */
133 struct cfg80211_bss pub;
134 };
135
bss_from_pub(struct cfg80211_bss * pub)136 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
137 {
138 return container_of(pub, struct cfg80211_internal_bss, pub);
139 }
140
cfg80211_hold_bss(struct cfg80211_internal_bss * bss)141 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
142 {
143 atomic_inc(&bss->hold);
144 }
145
cfg80211_unhold_bss(struct cfg80211_internal_bss * bss)146 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
147 {
148 int r = atomic_dec_return(&bss->hold);
149 WARN_ON(r < 0);
150 }
151
152
153 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
154 int get_wiphy_idx(struct wiphy *wiphy);
155
156 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
157
158 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
159 struct net *net);
160
wdev_lock(struct wireless_dev * wdev)161 static inline void wdev_lock(struct wireless_dev *wdev)
162 __acquires(wdev)
163 {
164 mutex_lock(&wdev->mtx);
165 __acquire(wdev->mtx);
166 }
167
wdev_unlock(struct wireless_dev * wdev)168 static inline void wdev_unlock(struct wireless_dev *wdev)
169 __releases(wdev)
170 {
171 __release(wdev->mtx);
172 mutex_unlock(&wdev->mtx);
173 }
174
175 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
176
cfg80211_has_monitors_only(struct cfg80211_registered_device * rdev)177 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
178 {
179 ASSERT_RTNL();
180
181 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
182 rdev->num_running_ifaces > 0;
183 }
184
185 enum cfg80211_event_type {
186 EVENT_CONNECT_RESULT,
187 EVENT_ROAMED,
188 EVENT_DISCONNECTED,
189 EVENT_IBSS_JOINED,
190 EVENT_STOPPED,
191 };
192
193 struct cfg80211_event {
194 struct list_head list;
195 enum cfg80211_event_type type;
196
197 union {
198 struct {
199 u8 bssid[ETH_ALEN];
200 const u8 *req_ie;
201 const u8 *resp_ie;
202 size_t req_ie_len;
203 size_t resp_ie_len;
204 u16 status;
205 } cr;
206 struct {
207 const u8 *req_ie;
208 const u8 *resp_ie;
209 size_t req_ie_len;
210 size_t resp_ie_len;
211 struct cfg80211_bss *bss;
212 } rm;
213 struct {
214 const u8 *ie;
215 size_t ie_len;
216 u16 reason;
217 } dc;
218 struct {
219 u8 bssid[ETH_ALEN];
220 struct ieee80211_channel *channel;
221 } ij;
222 };
223 };
224
225 struct cfg80211_cached_keys {
226 struct key_params params[6];
227 u8 data[6][WLAN_MAX_KEY_LEN];
228 int def, defmgmt;
229 };
230
231 enum cfg80211_chan_mode {
232 CHAN_MODE_UNDEFINED,
233 CHAN_MODE_SHARED,
234 CHAN_MODE_EXCLUSIVE,
235 };
236
237 struct cfg80211_beacon_registration {
238 struct list_head list;
239 u32 nlportid;
240 };
241
242 struct cfg80211_iface_destroy {
243 struct list_head list;
244 u32 nlportid;
245 };
246
247 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
248
249 /* free object */
250 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
251
252 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
253 char *newname);
254
255 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
256
257 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
258 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
259 unsigned long age_secs);
260
261 /* IBSS */
262 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
263 struct net_device *dev,
264 struct cfg80211_ibss_params *params,
265 struct cfg80211_cached_keys *connkeys);
266 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
267 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
268 struct net_device *dev, bool nowext);
269 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
270 struct net_device *dev, bool nowext);
271 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
272 struct ieee80211_channel *channel);
273 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
274 struct wireless_dev *wdev);
275
276 /* mesh */
277 extern const struct mesh_config default_mesh_config;
278 extern const struct mesh_setup default_mesh_setup;
279 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
280 struct net_device *dev,
281 struct mesh_setup *setup,
282 const struct mesh_config *conf);
283 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
284 struct net_device *dev,
285 struct mesh_setup *setup,
286 const struct mesh_config *conf);
287 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
288 struct net_device *dev);
289 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
290 struct net_device *dev);
291 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
292 struct wireless_dev *wdev,
293 struct cfg80211_chan_def *chandef);
294
295 /* AP */
296 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
297 struct net_device *dev, bool notify);
298 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
299 struct net_device *dev, bool notify);
300
301 /* MLME */
302 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
303 struct net_device *dev,
304 struct ieee80211_channel *chan,
305 enum nl80211_auth_type auth_type,
306 const u8 *bssid,
307 const u8 *ssid, int ssid_len,
308 const u8 *ie, int ie_len,
309 const u8 *key, int key_len, int key_idx,
310 const u8 *sae_data, int sae_data_len);
311 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
312 struct net_device *dev,
313 struct ieee80211_channel *chan,
314 const u8 *bssid,
315 const u8 *ssid, int ssid_len,
316 struct cfg80211_assoc_request *req);
317 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
318 struct net_device *dev, const u8 *bssid,
319 const u8 *ie, int ie_len, u16 reason,
320 bool local_state_change);
321 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
322 struct net_device *dev, const u8 *bssid,
323 const u8 *ie, int ie_len, u16 reason,
324 bool local_state_change);
325 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
326 struct net_device *dev);
327 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
328 u16 frame_type, const u8 *match_data,
329 int match_len);
330 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
331 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
332 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
333 struct wireless_dev *wdev,
334 struct cfg80211_mgmt_tx_params *params,
335 u64 *cookie);
336 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
337 const struct ieee80211_ht_cap *ht_capa_mask);
338 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
339 const struct ieee80211_vht_cap *vht_capa_mask);
340
341 /* SME events */
342 int cfg80211_connect(struct cfg80211_registered_device *rdev,
343 struct net_device *dev,
344 struct cfg80211_connect_params *connect,
345 struct cfg80211_cached_keys *connkeys,
346 const u8 *prev_bssid);
347 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
348 const u8 *req_ie, size_t req_ie_len,
349 const u8 *resp_ie, size_t resp_ie_len,
350 u16 status, bool wextev,
351 struct cfg80211_bss *bss);
352 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
353 size_t ie_len, u16 reason, bool from_ap);
354 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
355 struct net_device *dev, u16 reason,
356 bool wextev);
357 void __cfg80211_roamed(struct wireless_dev *wdev,
358 struct cfg80211_bss *bss,
359 const u8 *req_ie, size_t req_ie_len,
360 const u8 *resp_ie, size_t resp_ie_len);
361 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
362 struct wireless_dev *wdev);
363
364 /* SME implementation */
365 void cfg80211_conn_work(struct work_struct *work);
366 void cfg80211_sme_scan_done(struct net_device *dev);
367 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
368 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
369 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
370 void cfg80211_sme_deauth(struct wireless_dev *wdev);
371 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
372 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
373
374 /* internal helpers */
375 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
376 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
377 struct key_params *params, int key_idx,
378 bool pairwise, const u8 *mac_addr);
379 void __cfg80211_scan_done(struct work_struct *wk);
380 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
381 bool send_message);
382 void __cfg80211_sched_scan_results(struct work_struct *wk);
383 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
384 bool driver_initiated);
385 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
386 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
387 struct net_device *dev, enum nl80211_iftype ntype,
388 u32 *flags, struct vif_params *params);
389 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
390 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
391
392 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
393 struct wireless_dev *wdev,
394 enum nl80211_iftype iftype,
395 struct ieee80211_channel *chan,
396 enum cfg80211_chan_mode chanmode,
397 u8 radar_detect);
398
399 /**
400 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
401 * @wiphy: the wiphy to validate against
402 * @chandef: the channel definition to check
403 *
404 * Checks if chandef is usable and we can/need start CAC on such channel.
405 *
406 * Return: Return true if all channels available and at least
407 * one channel require CAC (NL80211_DFS_USABLE)
408 */
409 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
410 const struct cfg80211_chan_def *chandef);
411
412 void cfg80211_set_dfs_state(struct wiphy *wiphy,
413 const struct cfg80211_chan_def *chandef,
414 enum nl80211_dfs_state dfs_state);
415
416 void cfg80211_dfs_channels_update_work(struct work_struct *work);
417
418 unsigned int
419 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
420 const struct cfg80211_chan_def *chandef);
421
elapsed_jiffies_msecs(unsigned long start)422 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
423 {
424 unsigned long end = jiffies;
425
426 if (end >= start)
427 return jiffies_to_msecs(end - start);
428
429 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
430 }
431
432 void
433 cfg80211_get_chan_state(struct wireless_dev *wdev,
434 struct ieee80211_channel **chan,
435 enum cfg80211_chan_mode *chanmode,
436 u8 *radar_detect);
437
438 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
439 struct cfg80211_chan_def *chandef);
440
441 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
442 const u8 *rates, unsigned int n_rates,
443 u32 *mask);
444
445 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
446 u32 beacon_int);
447
448 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
449 enum nl80211_iftype iftype, int num);
450
451 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
452 struct wireless_dev *wdev);
453 void cfg80211_leave(struct cfg80211_registered_device *rdev,
454 struct wireless_dev *wdev);
455
456 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
457 struct wireless_dev *wdev);
458
459 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
460
461 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
462 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
463 #else
464 /*
465 * Trick to enable using it as a condition,
466 * and also not give a warning when it's
467 * not used that way.
468 */
469 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
470 #endif
471
472 #endif /* __NET_WIRELESS_CORE_H */
473