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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/mutex.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
23struct cfg80211_registered_device {
24 const struct cfg80211_ops *ops;
25 struct list_head list;
26 /* we hold this mutex during any call so that
27 * we cannot do multiple calls at once, and also
28 * to avoid the deregister call to proceed while
29 * any call is in progress */
30 struct mutex mtx;
31
32 /* rfkill support */
33 struct rfkill_ops rfkill_ops;
34 struct rfkill *rfkill;
35 struct work_struct rfkill_sync;
36
37 /* ISO / IEC 3166 alpha2 for which this device is receiving
38 * country IEs on, this can help disregard country IEs from APs
39 * on the same alpha2 quickly. The alpha2 may differ from
40 * cfg80211_regdomain's alpha2 when an intersection has occurred.
41 * If the AP is reconfigured this can also be used to tell us if
42 * the country on the country IE changed. */
43 char country_ie_alpha2[2];
44
45 /* If a Country IE has been received this tells us the environment
46 * which its telling us its in. This defaults to ENVIRON_ANY */
47 enum environment_cap env;
48
49 /* wiphy index, internal only */
50 int wiphy_idx;
51
52 /* associated wireless interfaces */
53 struct mutex devlist_mtx;
54 /* protected by devlist_mtx or RCU */
55 struct list_head wdev_list;
56 int devlist_generation, wdev_id;
57 int opencount; /* also protected by devlist_mtx */
58 wait_queue_head_t dev_wait;
59
60 struct list_head beacon_registrations;
61 spinlock_t beacon_registrations_lock;
62
63 /* protected by RTNL only */
64 int num_running_ifaces;
65 int num_running_monitor_ifaces;
66
67 /* BSSes/scanning */
68 spinlock_t bss_lock;
69 struct list_head bss_list;
70 struct rb_root bss_tree;
71 u32 bss_generation;
72 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
73 struct cfg80211_sched_scan_request *sched_scan_req;
74 unsigned long suspend_at;
75 struct work_struct scan_done_wk;
76 struct work_struct sched_scan_results_wk;
77
78 struct mutex sched_scan_mtx;
79
80#ifdef CONFIG_NL80211_TESTMODE
81 struct genl_info *testmode_info;
82#endif
83
84 struct work_struct conn_work;
85 struct work_struct event_work;
86
87 struct cfg80211_wowlan *wowlan;
88
89 struct delayed_work dfs_update_channels_wk;
90
91 /* must be last because of the way we do wiphy_priv(),
92 * and it should at least be aligned to NETDEV_ALIGN */
93 struct wiphy wiphy __aligned(NETDEV_ALIGN);
94};
95
96static inline
97struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
98{
99 BUG_ON(!wiphy);
100 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
101}
102
103static inline void
104cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
105{
106 int i;
107
108 if (!rdev->wowlan)
109 return;
110 for (i = 0; i < rdev->wowlan->n_patterns; i++)
111 kfree(rdev->wowlan->patterns[i].mask);
112 kfree(rdev->wowlan->patterns);
113 if (rdev->wowlan->tcp && rdev->wowlan->tcp->sock)
114 sock_release(rdev->wowlan->tcp->sock);
115 kfree(rdev->wowlan->tcp);
116 kfree(rdev->wowlan);
117}
118
119extern struct workqueue_struct *cfg80211_wq;
120extern struct mutex cfg80211_mutex;
121extern struct list_head cfg80211_rdev_list;
122extern int cfg80211_rdev_list_generation;
123
124static inline void assert_cfg80211_lock(void)
125{
126 lockdep_assert_held(&cfg80211_mutex);
127}
128
129struct cfg80211_internal_bss {
130 struct list_head list;
131 struct list_head hidden_list;
132 struct rb_node rbn;
133 unsigned long ts;
134 unsigned long refcount;
135 atomic_t hold;
136
137 /* must be last because of priv member */
138 struct cfg80211_bss pub;
139};
140
141static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
142{
143 return container_of(pub, struct cfg80211_internal_bss, pub);
144}
145
146static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
147{
148 atomic_inc(&bss->hold);
149}
150
151static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
152{
153 int r = atomic_dec_return(&bss->hold);
154 WARN_ON(r < 0);
155}
156
157
158struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
159int get_wiphy_idx(struct wiphy *wiphy);
160
161/* requires cfg80211_rdev_mutex to be held! */
162struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
163
164/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
165extern struct cfg80211_registered_device *
166cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
167
168int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
169 struct net *net);
170
171static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
172{
173 mutex_lock(&rdev->mtx);
174}
175
176static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
177{
178 BUG_ON(IS_ERR(rdev) || !rdev);
179 mutex_unlock(&rdev->mtx);
180}
181
182static inline void wdev_lock(struct wireless_dev *wdev)
183 __acquires(wdev)
184{
185 mutex_lock(&wdev->mtx);
186 __acquire(wdev->mtx);
187}
188
189static inline void wdev_unlock(struct wireless_dev *wdev)
190 __releases(wdev)
191{
192 __release(wdev->mtx);
193 mutex_unlock(&wdev->mtx);
194}
195
196#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
197#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
198
199static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
200{
201 ASSERT_RTNL();
202
203 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
204 rdev->num_running_ifaces > 0;
205}
206
207enum cfg80211_event_type {
208 EVENT_CONNECT_RESULT,
209 EVENT_ROAMED,
210 EVENT_DISCONNECTED,
211 EVENT_IBSS_JOINED,
212};
213
214struct cfg80211_event {
215 struct list_head list;
216 enum cfg80211_event_type type;
217
218 union {
219 struct {
220 u8 bssid[ETH_ALEN];
221 const u8 *req_ie;
222 const u8 *resp_ie;
223 size_t req_ie_len;
224 size_t resp_ie_len;
225 u16 status;
226 } cr;
227 struct {
228 const u8 *req_ie;
229 const u8 *resp_ie;
230 size_t req_ie_len;
231 size_t resp_ie_len;
232 struct cfg80211_bss *bss;
233 } rm;
234 struct {
235 const u8 *ie;
236 size_t ie_len;
237 u16 reason;
238 } dc;
239 struct {
240 u8 bssid[ETH_ALEN];
241 } ij;
242 };
243};
244
245struct cfg80211_cached_keys {
246 struct key_params params[6];
247 u8 data[6][WLAN_MAX_KEY_LEN];
248 int def, defmgmt;
249};
250
251enum cfg80211_chan_mode {
252 CHAN_MODE_UNDEFINED,
253 CHAN_MODE_SHARED,
254 CHAN_MODE_EXCLUSIVE,
255};
256
257struct cfg80211_beacon_registration {
258 struct list_head list;
259 u32 nlportid;
260};
261
262/* free object */
263extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
264
265extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
266 char *newname);
267
268void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
269
270void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
271void cfg80211_bss_age(struct cfg80211_registered_device *dev,
272 unsigned long age_secs);
273
274/* IBSS */
275int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
276 struct net_device *dev,
277 struct cfg80211_ibss_params *params,
278 struct cfg80211_cached_keys *connkeys);
279int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
280 struct net_device *dev,
281 struct cfg80211_ibss_params *params,
282 struct cfg80211_cached_keys *connkeys);
283void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
284int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
285 struct net_device *dev, bool nowext);
286int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
287 struct net_device *dev, bool nowext);
288void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
289int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
290 struct wireless_dev *wdev);
291
292/* mesh */
293extern const struct mesh_config default_mesh_config;
294extern const struct mesh_setup default_mesh_setup;
295int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
296 struct net_device *dev,
297 struct mesh_setup *setup,
298 const struct mesh_config *conf);
299int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
300 struct net_device *dev,
301 struct mesh_setup *setup,
302 const struct mesh_config *conf);
303int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
304 struct net_device *dev);
305int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
306 struct wireless_dev *wdev,
307 struct cfg80211_chan_def *chandef);
308
309/* AP */
310int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
311 struct net_device *dev);
312
313/* MLME */
314int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
315 struct net_device *dev,
316 struct ieee80211_channel *chan,
317 enum nl80211_auth_type auth_type,
318 const u8 *bssid,
319 const u8 *ssid, int ssid_len,
320 const u8 *ie, int ie_len,
321 const u8 *key, int key_len, int key_idx,
322 const u8 *sae_data, int sae_data_len);
323int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
324 struct net_device *dev, struct ieee80211_channel *chan,
325 enum nl80211_auth_type auth_type, const u8 *bssid,
326 const u8 *ssid, int ssid_len,
327 const u8 *ie, int ie_len,
328 const u8 *key, int key_len, int key_idx,
329 const u8 *sae_data, int sae_data_len);
330int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
331 struct net_device *dev,
332 struct ieee80211_channel *chan,
333 const u8 *bssid, const u8 *prev_bssid,
334 const u8 *ssid, int ssid_len,
335 const u8 *ie, int ie_len, bool use_mfp,
336 struct cfg80211_crypto_settings *crypt,
337 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
338 struct ieee80211_ht_cap *ht_capa_mask);
339int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
340 struct net_device *dev, struct ieee80211_channel *chan,
341 const u8 *bssid, const u8 *prev_bssid,
342 const u8 *ssid, int ssid_len,
343 const u8 *ie, int ie_len, bool use_mfp,
344 struct cfg80211_crypto_settings *crypt,
345 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
346 struct ieee80211_ht_cap *ht_capa_mask);
347int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
348 struct net_device *dev, const u8 *bssid,
349 const u8 *ie, int ie_len, u16 reason,
350 bool local_state_change);
351int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
352 struct net_device *dev, const u8 *bssid,
353 const u8 *ie, int ie_len, u16 reason,
354 bool local_state_change);
355int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
356 struct net_device *dev, const u8 *bssid,
357 const u8 *ie, int ie_len, u16 reason,
358 bool local_state_change);
359void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
360 struct net_device *dev);
361void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
362 const u8 *req_ie, size_t req_ie_len,
363 const u8 *resp_ie, size_t resp_ie_len,
364 u16 status, bool wextev,
365 struct cfg80211_bss *bss);
366int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
367 u16 frame_type, const u8 *match_data,
368 int match_len);
369void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
370void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
371int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
372 struct wireless_dev *wdev,
373 struct ieee80211_channel *chan, bool offchan,
374 unsigned int wait, const u8 *buf, size_t len,
375 bool no_cck, bool dont_wait_for_ack, u64 *cookie);
376void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
377 const struct ieee80211_ht_cap *ht_capa_mask);
378
379/* SME */
380int __cfg80211_connect(struct cfg80211_registered_device *rdev,
381 struct net_device *dev,
382 struct cfg80211_connect_params *connect,
383 struct cfg80211_cached_keys *connkeys,
384 const u8 *prev_bssid);
385int cfg80211_connect(struct cfg80211_registered_device *rdev,
386 struct net_device *dev,
387 struct cfg80211_connect_params *connect,
388 struct cfg80211_cached_keys *connkeys);
389int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
390 struct net_device *dev, u16 reason,
391 bool wextev);
392int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
393 struct net_device *dev, u16 reason,
394 bool wextev);
395void __cfg80211_roamed(struct wireless_dev *wdev,
396 struct cfg80211_bss *bss,
397 const u8 *req_ie, size_t req_ie_len,
398 const u8 *resp_ie, size_t resp_ie_len);
399int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
400 struct wireless_dev *wdev);
401
402void cfg80211_conn_work(struct work_struct *work);
403void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
404bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
405
406/* internal helpers */
407bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
408int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
409 struct key_params *params, int key_idx,
410 bool pairwise, const u8 *mac_addr);
411void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
412 size_t ie_len, u16 reason, bool from_ap);
413void cfg80211_sme_scan_done(struct net_device *dev);
414void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
415void cfg80211_sme_disassoc(struct net_device *dev,
416 struct cfg80211_internal_bss *bss);
417void __cfg80211_scan_done(struct work_struct *wk);
418void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
419void __cfg80211_sched_scan_results(struct work_struct *wk);
420int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
421 bool driver_initiated);
422void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
423int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
424 struct net_device *dev, enum nl80211_iftype ntype,
425 u32 *flags, struct vif_params *params);
426void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
427void cfg80211_process_wdev_events(struct wireless_dev *wdev);
428
429int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
430 struct wireless_dev *wdev,
431 enum nl80211_iftype iftype,
432 struct ieee80211_channel *chan,
433 enum cfg80211_chan_mode chanmode,
434 u8 radar_detect);
435
436/**
437 * cfg80211_chandef_dfs_required - checks if radar detection is required
438 * @wiphy: the wiphy to validate against
439 * @chandef: the channel definition to check
440 * Return: 1 if radar detection is required, 0 if it is not, < 0 on error
441 */
442int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
443 const struct cfg80211_chan_def *c);
444
445void cfg80211_set_dfs_state(struct wiphy *wiphy,
446 const struct cfg80211_chan_def *chandef,
447 enum nl80211_dfs_state dfs_state);
448
449void cfg80211_dfs_channels_update_work(struct work_struct *work);
450
451
452static inline int
453cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
454 struct wireless_dev *wdev,
455 enum nl80211_iftype iftype)
456{
457 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
458 CHAN_MODE_UNDEFINED, 0);
459}
460
461static inline int
462cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
463 enum nl80211_iftype iftype)
464{
465 return cfg80211_can_change_interface(rdev, NULL, iftype);
466}
467
468static inline int
469cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
470 struct wireless_dev *wdev,
471 struct ieee80211_channel *chan,
472 enum cfg80211_chan_mode chanmode)
473{
474 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
475 chan, chanmode, 0);
476}
477
478static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
479{
480 unsigned long end = jiffies;
481
482 if (end >= start)
483 return jiffies_to_msecs(end - start);
484
485 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
486}
487
488void
489cfg80211_get_chan_state(struct wireless_dev *wdev,
490 struct ieee80211_channel **chan,
491 enum cfg80211_chan_mode *chanmode);
492
493int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
494 struct cfg80211_chan_def *chandef);
495
496int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
497 const u8 *rates, unsigned int n_rates,
498 u32 *mask);
499
500int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
501 u32 beacon_int);
502
503void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
504 enum nl80211_iftype iftype, int num);
505
506#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
507
508#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
509#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
510#else
511/*
512 * Trick to enable using it as a condition,
513 * and also not give a warning when it's
514 * not used that way.
515 */
516#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
517#endif
518
519#endif /* __NET_WIRELESS_CORE_H */