1 /* 2 * Wireless configuration interface internals. 3 * 4 * Copyright 2006-2009 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 <net/genetlink.h> 17 #include <net/cfg80211.h> 18 #include "reg.h" 19 20 struct cfg80211_registered_device { 21 const struct cfg80211_ops *ops; 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 29 /* rfkill support */ 30 struct rfkill_ops rfkill_ops; 31 struct rfkill *rfkill; 32 struct work_struct rfkill_sync; 33 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 46 /* wiphy index, internal only */ 47 int wiphy_idx; 48 49 /* associate netdev list */ 50 struct mutex devlist_mtx; 51 struct list_head netdev_list; 52 int devlist_generation; 53 int opencount; /* also protected by devlist_mtx */ 54 wait_queue_head_t dev_wait; 55 56 /* BSSes/scanning */ 57 spinlock_t bss_lock; 58 struct list_head bss_list; 59 struct rb_root bss_tree; 60 u32 bss_generation; 61 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 62 unsigned long suspend_at; 63 struct work_struct scan_done_wk; 64 65 #ifdef CONFIG_NL80211_TESTMODE 66 struct genl_info *testmode_info; 67 #endif 68 69 struct work_struct conn_work; 70 struct work_struct event_work; 71 72 /* current channel */ 73 struct ieee80211_channel *channel; 74 75 #ifdef CONFIG_CFG80211_DEBUGFS 76 /* Debugfs entries */ 77 struct wiphy_debugfsdentries { 78 struct dentry *rts_threshold; 79 struct dentry *fragmentation_threshold; 80 struct dentry *short_retry_limit; 81 struct dentry *long_retry_limit; 82 struct dentry *ht40allow_map; 83 } debugfs; 84 #endif 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 91 static inline 92 struct 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 */ 99 static inline 100 bool wiphy_idx_valid(int wiphy_idx) 101 { 102 return (wiphy_idx >= 0); 103 } 104 105 extern struct mutex cfg80211_mutex; 106 extern struct list_head cfg80211_rdev_list; 107 extern int cfg80211_rdev_list_generation; 108 109 #define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex)) 110 111 /* 112 * You can use this to mark a wiphy_idx as not having an associated wiphy. 113 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL 114 */ 115 #define WIPHY_IDX_STALE -1 116 117 struct cfg80211_internal_bss { 118 struct list_head list; 119 struct rb_node rbn; 120 unsigned long ts; 121 struct kref ref; 122 atomic_t hold; 123 bool ies_allocated; 124 125 /* must be last because of priv member */ 126 struct cfg80211_bss pub; 127 }; 128 129 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 130 { 131 return container_of(pub, struct cfg80211_internal_bss, pub); 132 } 133 134 static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss) 135 { 136 kref_get(&bss->ref); 137 } 138 139 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 140 { 141 atomic_inc(&bss->hold); 142 } 143 144 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 145 { 146 int r = atomic_dec_return(&bss->hold); 147 WARN_ON(r < 0); 148 } 149 150 151 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 152 int get_wiphy_idx(struct wiphy *wiphy); 153 154 struct cfg80211_registered_device * 155 __cfg80211_rdev_from_info(struct genl_info *info); 156 157 /* 158 * This function returns a pointer to the driver 159 * that the genl_info item that is passed refers to. 160 * If successful, it returns non-NULL and also locks 161 * the driver's mutex! 162 * 163 * This means that you need to call cfg80211_unlock_rdev() 164 * before being allowed to acquire &cfg80211_mutex! 165 * 166 * This is necessary because we need to lock the global 167 * mutex to get an item off the list safely, and then 168 * we lock the rdev mutex so it doesn't go away under us. 169 * 170 * We don't want to keep cfg80211_mutex locked 171 * for all the time in order to allow requests on 172 * other interfaces to go through at the same time. 173 * 174 * The result of this can be a PTR_ERR and hence must 175 * be checked with IS_ERR() for errors. 176 */ 177 extern struct cfg80211_registered_device * 178 cfg80211_get_dev_from_info(struct genl_info *info); 179 180 /* requires cfg80211_rdev_mutex to be held! */ 181 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 182 183 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 184 extern struct cfg80211_registered_device * 185 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 186 187 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 188 struct net *net); 189 190 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 191 { 192 mutex_lock(&rdev->mtx); 193 } 194 195 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 196 { 197 BUG_ON(IS_ERR(rdev) || !rdev); 198 mutex_unlock(&rdev->mtx); 199 } 200 201 static inline void wdev_lock(struct wireless_dev *wdev) 202 __acquires(wdev) 203 { 204 mutex_lock(&wdev->mtx); 205 __acquire(wdev->mtx); 206 } 207 208 static inline void wdev_unlock(struct wireless_dev *wdev) 209 __releases(wdev) 210 { 211 __release(wdev->mtx); 212 mutex_unlock(&wdev->mtx); 213 } 214 215 #define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx)); 216 #define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx)); 217 218 enum cfg80211_event_type { 219 EVENT_CONNECT_RESULT, 220 EVENT_ROAMED, 221 EVENT_DISCONNECTED, 222 EVENT_IBSS_JOINED, 223 }; 224 225 struct cfg80211_event { 226 struct list_head list; 227 enum cfg80211_event_type type; 228 229 union { 230 struct { 231 u8 bssid[ETH_ALEN]; 232 const u8 *req_ie; 233 const u8 *resp_ie; 234 size_t req_ie_len; 235 size_t resp_ie_len; 236 u16 status; 237 } cr; 238 struct { 239 u8 bssid[ETH_ALEN]; 240 const u8 *req_ie; 241 const u8 *resp_ie; 242 size_t req_ie_len; 243 size_t resp_ie_len; 244 } rm; 245 struct { 246 const u8 *ie; 247 size_t ie_len; 248 u16 reason; 249 } dc; 250 struct { 251 u8 bssid[ETH_ALEN]; 252 } ij; 253 }; 254 }; 255 256 struct cfg80211_cached_keys { 257 struct key_params params[6]; 258 u8 data[6][WLAN_MAX_KEY_LEN]; 259 int def, defmgmt; 260 }; 261 262 263 /* free object */ 264 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 265 266 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 267 char *newname); 268 269 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 270 void wiphy_update_regulatory(struct wiphy *wiphy, 271 enum nl80211_reg_initiator setby); 272 273 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 274 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 275 unsigned long age_secs); 276 277 /* IBSS */ 278 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 279 struct net_device *dev, 280 struct cfg80211_ibss_params *params, 281 struct cfg80211_cached_keys *connkeys); 282 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 283 struct net_device *dev, 284 struct cfg80211_ibss_params *params, 285 struct cfg80211_cached_keys *connkeys); 286 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 287 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 288 struct net_device *dev, bool nowext); 289 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 290 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 291 struct wireless_dev *wdev); 292 293 /* MLME */ 294 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 295 struct net_device *dev, 296 struct ieee80211_channel *chan, 297 enum nl80211_auth_type auth_type, 298 const u8 *bssid, 299 const u8 *ssid, int ssid_len, 300 const u8 *ie, int ie_len, 301 const u8 *key, int key_len, int key_idx); 302 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 303 struct net_device *dev, struct ieee80211_channel *chan, 304 enum nl80211_auth_type auth_type, const u8 *bssid, 305 const u8 *ssid, int ssid_len, 306 const u8 *ie, int ie_len, 307 const u8 *key, int key_len, int key_idx); 308 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 309 struct net_device *dev, 310 struct ieee80211_channel *chan, 311 const u8 *bssid, const u8 *prev_bssid, 312 const u8 *ssid, int ssid_len, 313 const u8 *ie, int ie_len, bool use_mfp, 314 struct cfg80211_crypto_settings *crypt); 315 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 316 struct net_device *dev, struct ieee80211_channel *chan, 317 const u8 *bssid, const u8 *prev_bssid, 318 const u8 *ssid, int ssid_len, 319 const u8 *ie, int ie_len, bool use_mfp, 320 struct cfg80211_crypto_settings *crypt); 321 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 322 struct net_device *dev, const u8 *bssid, 323 const u8 *ie, int ie_len, u16 reason); 324 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 325 struct net_device *dev, const u8 *bssid, 326 const u8 *ie, int ie_len, u16 reason); 327 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 328 struct net_device *dev, const u8 *bssid, 329 const u8 *ie, int ie_len, u16 reason); 330 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 331 struct net_device *dev); 332 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 333 const u8 *req_ie, size_t req_ie_len, 334 const u8 *resp_ie, size_t resp_ie_len, 335 u16 status, bool wextev, 336 struct cfg80211_bss *bss); 337 338 /* SME */ 339 int __cfg80211_connect(struct cfg80211_registered_device *rdev, 340 struct net_device *dev, 341 struct cfg80211_connect_params *connect, 342 struct cfg80211_cached_keys *connkeys, 343 const u8 *prev_bssid); 344 int cfg80211_connect(struct cfg80211_registered_device *rdev, 345 struct net_device *dev, 346 struct cfg80211_connect_params *connect, 347 struct cfg80211_cached_keys *connkeys); 348 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 349 struct net_device *dev, u16 reason, 350 bool wextev); 351 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 352 struct net_device *dev, u16 reason, 353 bool wextev); 354 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid, 355 const u8 *req_ie, size_t req_ie_len, 356 const u8 *resp_ie, size_t resp_ie_len); 357 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 358 struct wireless_dev *wdev); 359 360 void cfg80211_conn_work(struct work_struct *work); 361 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev); 362 363 /* internal helpers */ 364 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 365 struct key_params *params, int key_idx, 366 const u8 *mac_addr); 367 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 368 size_t ie_len, u16 reason, bool from_ap); 369 void cfg80211_sme_scan_done(struct net_device *dev); 370 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); 371 void cfg80211_sme_disassoc(struct net_device *dev, int idx); 372 void __cfg80211_scan_done(struct work_struct *wk); 373 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 374 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 375 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 376 struct net_device *dev, enum nl80211_iftype ntype, 377 u32 *flags, struct vif_params *params); 378 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 379 380 struct ieee80211_channel * 381 rdev_fixed_channel(struct cfg80211_registered_device *rdev, 382 struct wireless_dev *for_wdev); 383 int rdev_set_freq(struct cfg80211_registered_device *rdev, 384 struct wireless_dev *for_wdev, 385 int freq, enum nl80211_channel_type channel_type); 386 387 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 388 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 389 #else 390 /* 391 * Trick to enable using it as a condition, 392 * and also not give a warning when it's 393 * not used that way. 394 */ 395 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 396 #endif 397 398 #endif /* __NET_WIRELESS_CORE_H */ 399