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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;
f5ea9120 52 int devlist_generation;
704232c2 53
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54 /* BSSes/scanning */
55 spinlock_t bss_lock;
56 struct list_head bss_list;
57 struct rb_root bss_tree;
58 u32 bss_generation;
59 struct cfg80211_scan_request *scan_req; /* protected by RTNL */
cb3a8eec 60 unsigned long suspend_at;
667503dd 61 struct work_struct scan_done_wk;
2a519311 62
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63#ifdef CONFIG_NL80211_TESTMODE
64 struct genl_info *testmode_info;
65#endif
66
6829c878 67 struct work_struct conn_work;
667503dd 68 struct work_struct event_work;
6829c878 69
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70 /* current channel */
71 struct ieee80211_channel *channel;
72
e43e820c 73#ifdef CONFIG_CFG80211_DEBUGFS
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74 /* Debugfs entries */
75 struct wiphy_debugfsdentries {
76 struct dentry *rts_threshold;
77 struct dentry *fragmentation_threshold;
78 struct dentry *short_retry_limit;
79 struct dentry *long_retry_limit;
80a3511d 80 struct dentry *ht40allow_map;
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81 } debugfs;
82#endif
83
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84 /* must be last because of the way we do wiphy_priv(),
85 * and it should at least be aligned to NETDEV_ALIGN */
86 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
87};
88
89static inline
90struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
91{
92 BUG_ON(!wiphy);
93 return container_of(wiphy, struct cfg80211_registered_device, wiphy);
94}
95
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96/* Note 0 is valid, hence phy0 */
97static inline
98bool wiphy_idx_valid(int wiphy_idx)
99{
100 return (wiphy_idx >= 0);
101}
102
a1794390 103extern struct mutex cfg80211_mutex;
79c97e97 104extern struct list_head cfg80211_rdev_list;
f5ea9120 105extern int cfg80211_rdev_list_generation;
704232c2 106
7edfab7a 107#define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex))
761cf7ec 108
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109/*
110 * You can use this to mark a wiphy_idx as not having an associated wiphy.
79c97e97 111 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
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112 */
113#define WIPHY_IDX_STALE -1
114
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115struct cfg80211_internal_bss {
116 struct list_head list;
117 struct rb_node rbn;
118 unsigned long ts;
119 struct kref ref;
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120 atomic_t hold;
121 bool ies_allocated;
a08c1c1a 122
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123 /* must be last because of priv member */
124 struct cfg80211_bss pub;
125};
126
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127static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
128{
129 return container_of(pub, struct cfg80211_internal_bss, pub);
130}
131
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132static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss)
133{
134 kref_get(&bss->ref);
135}
136
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137static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
138{
139 atomic_inc(&bss->hold);
140}
141
142static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
143{
144 int r = atomic_dec_return(&bss->hold);
145 WARN_ON(r < 0);
146}
147
148
79c97e97 149struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
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150int get_wiphy_idx(struct wiphy *wiphy);
151
4bbf4d56 152struct cfg80211_registered_device *
79c97e97 153__cfg80211_rdev_from_info(struct genl_info *info);
4bbf4d56 154
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155/*
156 * This function returns a pointer to the driver
157 * that the genl_info item that is passed refers to.
158 * If successful, it returns non-NULL and also locks
159 * the driver's mutex!
160 *
4d0c8aea 161 * This means that you need to call cfg80211_unlock_rdev()
a1794390 162 * before being allowed to acquire &cfg80211_mutex!
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163 *
164 * This is necessary because we need to lock the global
165 * mutex to get an item off the list safely, and then
79c97e97 166 * we lock the rdev mutex so it doesn't go away under us.
55682965 167 *
a1794390 168 * We don't want to keep cfg80211_mutex locked
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169 * for all the time in order to allow requests on
170 * other interfaces to go through at the same time.
171 *
172 * The result of this can be a PTR_ERR and hence must
173 * be checked with IS_ERR() for errors.
174 */
175extern struct cfg80211_registered_device *
176cfg80211_get_dev_from_info(struct genl_info *info);
177
79c97e97 178/* requires cfg80211_rdev_mutex to be held! */
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179struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
180
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181/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
182extern struct cfg80211_registered_device *
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183cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
184
185int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
186 struct net *net);
55682965 187
79c97e97 188static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
667503dd 189{
79c97e97 190 mutex_lock(&rdev->mtx);
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191}
192
79c97e97 193static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
4d0c8aea 194{
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195 BUG_ON(IS_ERR(rdev) || !rdev);
196 mutex_unlock(&rdev->mtx);
4d0c8aea 197}
55682965 198
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199static inline void wdev_lock(struct wireless_dev *wdev)
200 __acquires(wdev)
201{
202 mutex_lock(&wdev->mtx);
203 __acquire(wdev->mtx);
204}
205
206static inline void wdev_unlock(struct wireless_dev *wdev)
207 __releases(wdev)
208{
209 __release(wdev->mtx);
210 mutex_unlock(&wdev->mtx);
211}
212
213#define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx));
214#define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx));
215
216enum cfg80211_event_type {
217 EVENT_CONNECT_RESULT,
218 EVENT_ROAMED,
219 EVENT_DISCONNECTED,
220 EVENT_IBSS_JOINED,
221};
222
223struct cfg80211_event {
224 struct list_head list;
225 enum cfg80211_event_type type;
226
227 union {
228 struct {
229 u8 bssid[ETH_ALEN];
230 const u8 *req_ie;
231 const u8 *resp_ie;
232 size_t req_ie_len;
233 size_t resp_ie_len;
234 u16 status;
235 } cr;
236 struct {
237 u8 bssid[ETH_ALEN];
238 const u8 *req_ie;
239 const u8 *resp_ie;
240 size_t req_ie_len;
241 size_t resp_ie_len;
242 } rm;
243 struct {
244 const u8 *ie;
245 size_t ie_len;
246 u16 reason;
247 } dc;
248 struct {
249 u8 bssid[ETH_ALEN];
250 } ij;
251 };
252};
253
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254struct cfg80211_cached_keys {
255 struct key_params params[6];
256 u8 data[6][WLAN_MAX_KEY_LEN];
257 int def, defmgmt;
258};
259
667503dd 260
704232c2 261/* free object */
79c97e97 262extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
704232c2 263
79c97e97 264extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
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265 char *newname);
266
8318d78a 267void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
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268void wiphy_update_regulatory(struct wiphy *wiphy,
269 enum nl80211_reg_initiator setby);
8318d78a 270
2a519311 271void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
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272void cfg80211_bss_age(struct cfg80211_registered_device *dev,
273 unsigned long age_secs);
2a519311 274
04a773ad 275/* IBSS */
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276int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
277 struct net_device *dev,
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278 struct cfg80211_ibss_params *params,
279 struct cfg80211_cached_keys *connkeys);
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280int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
281 struct net_device *dev,
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282 struct cfg80211_ibss_params *params,
283 struct cfg80211_cached_keys *connkeys);
9d308429 284void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
04a773ad 285int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
9d308429 286 struct net_device *dev, bool nowext);
667503dd 287void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
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288int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
289 struct wireless_dev *wdev);
04a773ad 290
19957bb3 291/* MLME */
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292int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
293 struct net_device *dev,
294 struct ieee80211_channel *chan,
295 enum nl80211_auth_type auth_type,
296 const u8 *bssid,
297 const u8 *ssid, int ssid_len,
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298 const u8 *ie, int ie_len,
299 const u8 *key, int key_len, int key_idx);
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300int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
301 struct net_device *dev, struct ieee80211_channel *chan,
302 enum nl80211_auth_type auth_type, const u8 *bssid,
303 const u8 *ssid, int ssid_len,
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304 const u8 *ie, int ie_len,
305 const u8 *key, int key_len, int key_idx);
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306int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
307 struct net_device *dev,
308 struct ieee80211_channel *chan,
309 const u8 *bssid, const u8 *prev_bssid,
310 const u8 *ssid, int ssid_len,
311 const u8 *ie, int ie_len, bool use_mfp,
312 struct cfg80211_crypto_settings *crypt);
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313int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
314 struct net_device *dev, struct ieee80211_channel *chan,
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315 const u8 *bssid, const u8 *prev_bssid,
316 const u8 *ssid, int ssid_len,
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317 const u8 *ie, int ie_len, bool use_mfp,
318 struct cfg80211_crypto_settings *crypt);
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319int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
320 struct net_device *dev, const u8 *bssid,
321 const u8 *ie, int ie_len, u16 reason);
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322int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
323 struct net_device *dev, const u8 *bssid,
324 const u8 *ie, int ie_len, u16 reason);
325int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
326 struct net_device *dev, const u8 *bssid,
327 const u8 *ie, int ie_len, u16 reason);
328void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
329 struct net_device *dev);
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330void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
331 const u8 *req_ie, size_t req_ie_len,
332 const u8 *resp_ie, size_t resp_ie_len,
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333 u16 status, bool wextev,
334 struct cfg80211_bss *bss);
19957bb3 335
b23aa676 336/* SME */
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337int __cfg80211_connect(struct cfg80211_registered_device *rdev,
338 struct net_device *dev,
fffd0934 339 struct cfg80211_connect_params *connect,
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340 struct cfg80211_cached_keys *connkeys,
341 const u8 *prev_bssid);
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342int cfg80211_connect(struct cfg80211_registered_device *rdev,
343 struct net_device *dev,
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344 struct cfg80211_connect_params *connect,
345 struct cfg80211_cached_keys *connkeys);
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346int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
347 struct net_device *dev, u16 reason,
348 bool wextev);
b23aa676 349int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
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350 struct net_device *dev, u16 reason,
351 bool wextev);
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352void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
353 const u8 *req_ie, size_t req_ie_len,
354 const u8 *resp_ie, size_t resp_ie_len);
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355int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
356 struct wireless_dev *wdev);
b23aa676 357
6829c878 358void cfg80211_conn_work(struct work_struct *work);
f401a6f7 359bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
6829c878 360
08645126 361/* internal helpers */
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362int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
363 struct key_params *params, int key_idx,
08645126 364 const u8 *mac_addr);
667503dd 365void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
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366 size_t ie_len, u16 reason, bool from_ap);
367void cfg80211_sme_scan_done(struct net_device *dev);
368void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
19957bb3 369void cfg80211_sme_disassoc(struct net_device *dev, int idx);
667503dd 370void __cfg80211_scan_done(struct work_struct *wk);
36e6fea8 371void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev);
fffd0934 372void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
08645126 373
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374struct ieee80211_channel *
375rdev_fixed_channel(struct cfg80211_registered_device *rdev,
376 struct wireless_dev *for_wdev);
377int rdev_set_freq(struct cfg80211_registered_device *rdev,
4b181144 378 struct wireless_dev *for_wdev,
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379 int freq, enum nl80211_channel_type channel_type);
380
704232c2 381#endif /* __NET_WIRELESS_CORE_H */