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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/kref.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
21struct cfg80211_registered_device {
22 const struct cfg80211_ops *ops;
23 struct list_head list;
24 /* we hold this mutex during any call so that
25 * we cannot do multiple calls at once, and also
26 * to avoid the deregister call to proceed while
27 * any call is in progress */
28 struct mutex mtx;
29
30 /* rfkill support */
31 struct rfkill_ops rfkill_ops;
32 struct rfkill *rfkill;
33 struct work_struct rfkill_sync;
34
35 /* ISO / IEC 3166 alpha2 for which this device is receiving
36 * country IEs on, this can help disregard country IEs from APs
37 * on the same alpha2 quickly. The alpha2 may differ from
38 * cfg80211_regdomain's alpha2 when an intersection has occurred.
39 * If the AP is reconfigured this can also be used to tell us if
40 * the country on the country IE changed. */
41 char country_ie_alpha2[2];
42
43 /* If a Country IE has been received this tells us the environment
44 * which its telling us its in. This defaults to ENVIRON_ANY */
45 enum environment_cap env;
46
47 /* wiphy index, internal only */
48 int wiphy_idx;
49
50 /* associated wireless interfaces */
51 struct mutex devlist_mtx;
52 /* protected by devlist_mtx or RCU */
53 struct list_head wdev_list;
54 int devlist_generation, wdev_id;
55 int opencount; /* also protected by devlist_mtx */
56 wait_queue_head_t dev_wait;
57
58 u32 ap_beacons_nlpid;
59
60 /* protected by RTNL only */
61 int num_running_ifaces;
62 int num_running_monitor_ifaces;
63
64 /* BSSes/scanning */
65 spinlock_t bss_lock;
66 struct list_head bss_list;
67 struct rb_root bss_tree;
68 u32 bss_generation;
69 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
70 struct cfg80211_sched_scan_request *sched_scan_req;
71 unsigned long suspend_at;
72 struct work_struct scan_done_wk;
73 struct work_struct sched_scan_results_wk;
74
75 struct mutex sched_scan_mtx;
76
77#ifdef CONFIG_NL80211_TESTMODE
78 struct genl_info *testmode_info;
79#endif
80
81 struct work_struct conn_work;
82 struct work_struct event_work;
83
84 struct cfg80211_wowlan *wowlan;
85
86 /* must be last because of the way we do wiphy_priv(),
87 * and it should at least be aligned to NETDEV_ALIGN */
88 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
89};
90
91static inline
92struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
93{
94 BUG_ON(!wiphy);
95 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
96}
97
98/* Note 0 is valid, hence phy0 */
99static inline
100bool wiphy_idx_valid(int wiphy_idx)
101{
102 return wiphy_idx >= 0;
103}
104
105static inline void
106cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
107{
108 int i;
109
110 if (!rdev->wowlan)
111 return;
112 for (i = 0; i < rdev->wowlan->n_patterns; i++)
113 kfree(rdev->wowlan->patterns[i].mask);
114 kfree(rdev->wowlan->patterns);
115 kfree(rdev->wowlan);
116}
117
118extern struct workqueue_struct *cfg80211_wq;
119extern struct mutex cfg80211_mutex;
120extern struct list_head cfg80211_rdev_list;
121extern int cfg80211_rdev_list_generation;
122
123static inline void assert_cfg80211_lock(void)
124{
125 lockdep_assert_held(&cfg80211_mutex);
126}
127
128/*
129 * You can use this to mark a wiphy_idx as not having an associated wiphy.
130 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
131 */
132#define WIPHY_IDX_STALE -1
133
134struct cfg80211_internal_bss {
135 struct list_head list;
136 struct rb_node rbn;
137 unsigned long ts;
138 struct kref ref;
139 atomic_t hold;
140 bool beacon_ies_allocated;
141 bool proberesp_ies_allocated;
142
143 /* must be last because of priv member */
144 struct cfg80211_bss pub;
145};
146
147static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
148{
149 return container_of(pub, struct cfg80211_internal_bss, pub);
150}
151
152static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
153{
154 atomic_inc(&bss->hold);
155}
156
157static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
158{
159 int r = atomic_dec_return(&bss->hold);
160 WARN_ON(r < 0);
161}
162
163
164struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
165int get_wiphy_idx(struct wiphy *wiphy);
166
167/* requires cfg80211_rdev_mutex to be held! */
168struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
169
170/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
171extern struct cfg80211_registered_device *
172cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
173
174int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
175 struct net *net);
176
177static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
178{
179 mutex_lock(&rdev->mtx);
180}
181
182static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
183{
184 BUG_ON(IS_ERR(rdev) || !rdev);
185 mutex_unlock(&rdev->mtx);
186}
187
188static inline void wdev_lock(struct wireless_dev *wdev)
189 __acquires(wdev)
190{
191 mutex_lock(&wdev->mtx);
192 __acquire(wdev->mtx);
193}
194
195static inline void wdev_unlock(struct wireless_dev *wdev)
196 __releases(wdev)
197{
198 __release(wdev->mtx);
199 mutex_unlock(&wdev->mtx);
200}
201
202#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
203#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
204
205static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
206{
207 ASSERT_RTNL();
208
209 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
210 rdev->num_running_ifaces > 0;
211}
212
213enum cfg80211_event_type {
214 EVENT_CONNECT_RESULT,
215 EVENT_ROAMED,
216 EVENT_DISCONNECTED,
217 EVENT_IBSS_JOINED,
218};
219
220struct cfg80211_event {
221 struct list_head list;
222 enum cfg80211_event_type type;
223
224 union {
225 struct {
226 u8 bssid[ETH_ALEN];
227 const u8 *req_ie;
228 const u8 *resp_ie;
229 size_t req_ie_len;
230 size_t resp_ie_len;
231 u16 status;
232 } cr;
233 struct {
234 const u8 *req_ie;
235 const u8 *resp_ie;
236 size_t req_ie_len;
237 size_t resp_ie_len;
238 struct cfg80211_bss *bss;
239 } rm;
240 struct {
241 const u8 *ie;
242 size_t ie_len;
243 u16 reason;
244 } dc;
245 struct {
246 u8 bssid[ETH_ALEN];
247 } ij;
248 };
249};
250
251struct cfg80211_cached_keys {
252 struct key_params params[6];
253 u8 data[6][WLAN_MAX_KEY_LEN];
254 int def, defmgmt;
255};
256
257enum cfg80211_chan_mode {
258 CHAN_MODE_UNDEFINED,
259 CHAN_MODE_SHARED,
260 CHAN_MODE_EXCLUSIVE,
261};
262
263
264/* free object */
265extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
266
267extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
268 char *newname);
269
270void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
271
272void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
273void cfg80211_bss_age(struct cfg80211_registered_device *dev,
274 unsigned long age_secs);
275
276/* IBSS */
277int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
278 struct net_device *dev,
279 struct cfg80211_ibss_params *params,
280 struct cfg80211_cached_keys *connkeys);
281int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
282 struct net_device *dev,
283 struct cfg80211_ibss_params *params,
284 struct cfg80211_cached_keys *connkeys);
285void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
286int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
287 struct net_device *dev, bool nowext);
288int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
289 struct net_device *dev, bool nowext);
290void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
291int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
292 struct wireless_dev *wdev);
293
294/* mesh */
295extern const struct mesh_config default_mesh_config;
296extern const struct mesh_setup default_mesh_setup;
297int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
298 struct net_device *dev,
299 struct mesh_setup *setup,
300 const struct mesh_config *conf);
301int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
302 struct net_device *dev,
303 struct mesh_setup *setup,
304 const struct mesh_config *conf);
305int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
306 struct net_device *dev);
307int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
308 struct wireless_dev *wdev, int freq,
309 enum nl80211_channel_type channel_type);
310
311/* AP */
312int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
313 struct net_device *dev);
314
315/* MLME */
316int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
317 struct net_device *dev,
318 struct ieee80211_channel *chan,
319 enum nl80211_auth_type auth_type,
320 const u8 *bssid,
321 const u8 *ssid, int ssid_len,
322 const u8 *ie, int ie_len,
323 const u8 *key, int key_len, int key_idx);
324int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
325 struct net_device *dev, struct ieee80211_channel *chan,
326 enum nl80211_auth_type auth_type, const u8 *bssid,
327 const u8 *ssid, int ssid_len,
328 const u8 *ie, int ie_len,
329 const u8 *key, int key_len, int key_idx);
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 enum nl80211_channel_type channel_type,
375 bool channel_type_valid, unsigned int wait,
376 const u8 *buf, size_t len, bool no_cck,
377 bool dont_wait_for_ack, u64 *cookie);
378void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
379 const struct ieee80211_ht_cap *ht_capa_mask);
380
381/* SME */
382int __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);
387int cfg80211_connect(struct cfg80211_registered_device *rdev,
388 struct net_device *dev,
389 struct cfg80211_connect_params *connect,
390 struct cfg80211_cached_keys *connkeys);
391int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
392 struct net_device *dev, u16 reason,
393 bool wextev);
394int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
395 struct net_device *dev, u16 reason,
396 bool wextev);
397void __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);
401int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
402 struct wireless_dev *wdev);
403
404void cfg80211_conn_work(struct work_struct *work);
405void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
406bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
407
408/* internal helpers */
409bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
410int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
411 struct key_params *params, int key_idx,
412 bool pairwise, const u8 *mac_addr);
413void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
414 size_t ie_len, u16 reason, bool from_ap);
415void cfg80211_sme_scan_done(struct net_device *dev);
416void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
417void cfg80211_sme_disassoc(struct net_device *dev,
418 struct cfg80211_internal_bss *bss);
419void __cfg80211_scan_done(struct work_struct *wk);
420void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
421void __cfg80211_sched_scan_results(struct work_struct *wk);
422int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
423 bool driver_initiated);
424void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
425int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
426 struct net_device *dev, enum nl80211_iftype ntype,
427 u32 *flags, struct vif_params *params);
428void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
429
430int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
431 struct wireless_dev *wdev,
432 enum nl80211_iftype iftype,
433 struct ieee80211_channel *chan,
434 enum cfg80211_chan_mode chanmode);
435
436static inline int
437cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
438 struct wireless_dev *wdev,
439 enum nl80211_iftype iftype)
440{
441 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
442 CHAN_MODE_UNDEFINED);
443}
444
445static inline int
446cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
447 enum nl80211_iftype iftype)
448{
449 return cfg80211_can_change_interface(rdev, NULL, iftype);
450}
451
452static inline int
453cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
454 struct wireless_dev *wdev,
455 struct ieee80211_channel *chan,
456 enum cfg80211_chan_mode chanmode)
457{
458 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
459 chan, chanmode);
460}
461
462void
463cfg80211_get_chan_state(struct wireless_dev *wdev,
464 struct ieee80211_channel **chan,
465 enum cfg80211_chan_mode *chanmode);
466
467struct ieee80211_channel *
468rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
469 int freq, enum nl80211_channel_type channel_type);
470int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
471 int freq, enum nl80211_channel_type chantype);
472
473int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
474 const u8 *rates, unsigned int n_rates,
475 u32 *mask);
476
477int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
478 u32 beacon_int);
479
480void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
481 enum nl80211_iftype iftype, int num);
482
483#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
484
485#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
486#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
487#else
488/*
489 * Trick to enable using it as a condition,
490 * and also not give a warning when it's
491 * not used that way.
492 */
493#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
494#endif
495
496#endif /* __NET_WIRELESS_CORE_H */