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704232c2
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1/*
2 * Wireless configuration interface internals.
3 *
08645126 4 * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net>
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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>
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11#include <linux/kref.h>
12#include <linux/rbtree.h>
1ac61302 13#include <linux/debugfs.h>
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14#include <linux/rfkill.h>
15#include <linux/workqueue.h>
704232c2 16#include <net/genetlink.h>
704232c2 17#include <net/cfg80211.h>
3f2355cb 18#include "reg.h"
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19
20struct cfg80211_registered_device {
3dcf670b 21 const struct cfg80211_ops *ops;
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22 struct list_head list;
23 /* we hold this mutex during any call so that
24 * we cannot do multiple calls at once, and also
25 * to avoid the deregister call to proceed while
26 * any call is in progress */
27 struct mutex mtx;
28
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29 /* rfkill support */
30 struct rfkill_ops rfkill_ops;
31 struct rfkill *rfkill;
32 struct work_struct rfkill_sync;
33
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34 /* ISO / IEC 3166 alpha2 for which this device is receiving
35 * country IEs on, this can help disregard country IEs from APs
36 * on the same alpha2 quickly. The alpha2 may differ from
37 * cfg80211_regdomain's alpha2 when an intersection has occurred.
38 * If the AP is reconfigured this can also be used to tell us if
39 * the country on the country IE changed. */
40 char country_ie_alpha2[2];
41
42 /* If a Country IE has been received this tells us the environment
43 * which its telling us its in. This defaults to ENVIRON_ANY */
44 enum environment_cap env;
45
704232c2 46 /* wiphy index, internal only */
b5850a7a 47 int wiphy_idx;
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48
49 /* associate netdev list */
50 struct mutex devlist_mtx;
51 struct list_head netdev_list;
52
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53 /* BSSes/scanning */
54 spinlock_t bss_lock;
55 struct list_head bss_list;
56 struct rb_root bss_tree;
57 u32 bss_generation;
58 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
cb3a8eec 59 unsigned long suspend_at;
667503dd 60 struct work_struct scan_done_wk;
2a519311 61
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62#ifdef CONFIG_NL80211_TESTMODE
63 struct genl_info *testmode_info;
64#endif
65
6829c878 66 struct work_struct conn_work;
667503dd 67 struct work_struct event_work;
6829c878 68
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69 /* current channel */
70 struct ieee80211_channel *channel;
71
e43e820c 72#ifdef CONFIG_CFG80211_DEBUGFS
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73 /* Debugfs entries */
74 struct wiphy_debugfsdentries {
75 struct dentry *rts_threshold;
76 struct dentry *fragmentation_threshold;
77 struct dentry *short_retry_limit;
78 struct dentry *long_retry_limit;
80a3511d 79 struct dentry *ht40allow_map;
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80 } debugfs;
81#endif
82
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83 /* must be last because of the way we do wiphy_priv(),
84 * and it should at least be aligned to NETDEV_ALIGN */
85 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
86};
87
88static inline
89struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
90{
91 BUG_ON(!wiphy);
92 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
93}
94
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95/* Note 0 is valid, hence phy0 */
96static inline
97bool wiphy_idx_valid(int wiphy_idx)
98{
99 return (wiphy_idx >= 0);
100}
101
a1794390 102extern struct mutex cfg80211_mutex;
79c97e97 103extern struct list_head cfg80211_rdev_list;
704232c2 104
7edfab7a 105#define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex))
761cf7ec 106
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107/*
108 * You can use this to mark a wiphy_idx as not having an associated wiphy.
79c97e97 109 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
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110 */
111#define WIPHY_IDX_STALE -1
112
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113struct cfg80211_internal_bss {
114 struct list_head list;
115 struct rb_node rbn;
116 unsigned long ts;
117 struct kref ref;
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118 atomic_t hold;
119 bool ies_allocated;
a08c1c1a 120
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121 /* must be last because of priv member */
122 struct cfg80211_bss pub;
123};
124
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125static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
126{
127 return container_of(pub, struct cfg80211_internal_bss, pub);
128}
129
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130static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss)
131{
132 kref_get(&bss->ref);
133}
134
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135static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
136{
137 atomic_inc(&bss->hold);
138}
139
140static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
141{
142 int r = atomic_dec_return(&bss->hold);
143 WARN_ON(r < 0);
144}
145
146
79c97e97 147struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
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148int get_wiphy_idx(struct wiphy *wiphy);
149
4bbf4d56 150struct cfg80211_registered_device *
79c97e97 151__cfg80211_rdev_from_info(struct genl_info *info);
4bbf4d56 152
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153/*
154 * This function returns a pointer to the driver
155 * that the genl_info item that is passed refers to.
156 * If successful, it returns non-NULL and also locks
157 * the driver's mutex!
158 *
4d0c8aea 159 * This means that you need to call cfg80211_unlock_rdev()
a1794390 160 * before being allowed to acquire &cfg80211_mutex!
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161 *
162 * This is necessary because we need to lock the global
163 * mutex to get an item off the list safely, and then
79c97e97 164 * we lock the rdev mutex so it doesn't go away under us.
55682965 165 *
a1794390 166 * We don't want to keep cfg80211_mutex locked
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167 * for all the time in order to allow requests on
168 * other interfaces to go through at the same time.
169 *
170 * The result of this can be a PTR_ERR and hence must
171 * be checked with IS_ERR() for errors.
172 */
173extern struct cfg80211_registered_device *
174cfg80211_get_dev_from_info(struct genl_info *info);
175
79c97e97 176/* requires cfg80211_rdev_mutex to be held! */
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177struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
178
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179/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
180extern struct cfg80211_registered_device *
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181cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
182
183int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
184 struct net *net);
55682965 185
79c97e97 186static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
667503dd 187{
79c97e97 188 mutex_lock(&rdev->mtx);
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189}
190
79c97e97 191static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
4d0c8aea 192{
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193 BUG_ON(IS_ERR(rdev) || !rdev);
194 mutex_unlock(&rdev->mtx);
4d0c8aea 195}
55682965 196
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197static inline void wdev_lock(struct wireless_dev *wdev)
198 __acquires(wdev)
199{
200 mutex_lock(&wdev->mtx);
201 __acquire(wdev->mtx);
202}
203
204static inline void wdev_unlock(struct wireless_dev *wdev)
205 __releases(wdev)
206{
207 __release(wdev->mtx);
208 mutex_unlock(&wdev->mtx);
209}
210
211#define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx));
212#define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx));
213
214enum cfg80211_event_type {
215 EVENT_CONNECT_RESULT,
216 EVENT_ROAMED,
217 EVENT_DISCONNECTED,
218 EVENT_IBSS_JOINED,
219};
220
221struct cfg80211_event {
222 struct list_head list;
223 enum cfg80211_event_type type;
224
225 union {
226 struct {
227 u8 bssid[ETH_ALEN];
228 const u8 *req_ie;
229 const u8 *resp_ie;
230 size_t req_ie_len;
231 size_t resp_ie_len;
232 u16 status;
233 } cr;
234 struct {
235 u8 bssid[ETH_ALEN];
236 const u8 *req_ie;
237 const u8 *resp_ie;
238 size_t req_ie_len;
239 size_t resp_ie_len;
240 } rm;
241 struct {
242 const u8 *ie;
243 size_t ie_len;
244 u16 reason;
245 } dc;
246 struct {
247 u8 bssid[ETH_ALEN];
248 } ij;
249 };
250};
251
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252struct cfg80211_cached_keys {
253 struct key_params params[6];
254 u8 data[6][WLAN_MAX_KEY_LEN];
255 int def, defmgmt;
256};
257
667503dd 258
704232c2 259/* free object */
79c97e97 260extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
704232c2 261
79c97e97 262extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
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263 char *newname);
264
8318d78a 265void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
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266void wiphy_update_regulatory(struct wiphy *wiphy,
267 enum nl80211_reg_initiator setby);
8318d78a 268
2a519311 269void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
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270void cfg80211_bss_age(struct cfg80211_registered_device *dev,
271 unsigned long age_secs);
2a519311 272
04a773ad 273/* IBSS */
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274int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
275 struct net_device *dev,
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276 struct cfg80211_ibss_params *params,
277 struct cfg80211_cached_keys *connkeys);
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278int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
279 struct net_device *dev,
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280 struct cfg80211_ibss_params *params,
281 struct cfg80211_cached_keys *connkeys);
9d308429 282void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
04a773ad 283int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
9d308429 284 struct net_device *dev, bool nowext);
667503dd 285void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
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286int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
287 struct wireless_dev *wdev);
04a773ad 288
19957bb3 289/* MLME */
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290int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
291 struct net_device *dev,
292 struct ieee80211_channel *chan,
293 enum nl80211_auth_type auth_type,
294 const u8 *bssid,
295 const u8 *ssid, int ssid_len,
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296 const u8 *ie, int ie_len,
297 const u8 *key, int key_len, int key_idx);
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298int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
299 struct net_device *dev, struct ieee80211_channel *chan,
300 enum nl80211_auth_type auth_type, const u8 *bssid,
301 const u8 *ssid, int ssid_len,
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302 const u8 *ie, int ie_len,
303 const u8 *key, int key_len, int key_idx);
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304int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
305 struct net_device *dev,
306 struct ieee80211_channel *chan,
307 const u8 *bssid, const u8 *prev_bssid,
308 const u8 *ssid, int ssid_len,
309 const u8 *ie, int ie_len, bool use_mfp,
310 struct cfg80211_crypto_settings *crypt);
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311int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
312 struct net_device *dev, struct ieee80211_channel *chan,
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313 const u8 *bssid, const u8 *prev_bssid,
314 const u8 *ssid, int ssid_len,
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315 const u8 *ie, int ie_len, bool use_mfp,
316 struct cfg80211_crypto_settings *crypt);
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317int __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);
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320int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
321 struct net_device *dev, const u8 *bssid,
322 const u8 *ie, int ie_len, u16 reason);
323int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
324 struct net_device *dev, const u8 *bssid,
325 const u8 *ie, int ie_len, u16 reason);
326void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
327 struct net_device *dev);
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328void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
329 const u8 *req_ie, size_t req_ie_len,
330 const u8 *resp_ie, size_t resp_ie_len,
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331 u16 status, bool wextev,
332 struct cfg80211_bss *bss);
19957bb3 333
b23aa676 334/* SME */
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335int __cfg80211_connect(struct cfg80211_registered_device *rdev,
336 struct net_device *dev,
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337 struct cfg80211_connect_params *connect,
338 struct cfg80211_cached_keys *connkeys);
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339int cfg80211_connect(struct cfg80211_registered_device *rdev,
340 struct net_device *dev,
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341 struct cfg80211_connect_params *connect,
342 struct cfg80211_cached_keys *connkeys);
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343int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
344 struct net_device *dev, u16 reason,
345 bool wextev);
b23aa676 346int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
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347 struct net_device *dev, u16 reason,
348 bool wextev);
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349void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
350 const u8 *req_ie, size_t req_ie_len,
351 const u8 *resp_ie, size_t resp_ie_len);
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352int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
353 struct wireless_dev *wdev);
b23aa676 354
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355void cfg80211_conn_work(struct work_struct *work);
356
08645126 357/* internal helpers */
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358int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
359 struct key_params *params, int key_idx,
08645126 360 const u8 *mac_addr);
667503dd 361void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
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362 size_t ie_len, u16 reason, bool from_ap);
363void cfg80211_sme_scan_done(struct net_device *dev);
364void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
19957bb3 365void cfg80211_sme_disassoc(struct net_device *dev, int idx);
667503dd 366void __cfg80211_scan_done(struct work_struct *wk);
fffd0934 367void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
08645126 368
704232c2 369#endif /* __NET_WIRELESS_CORE_H */