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 /* must be last because of the way we do wiphy_priv(), 76 * and it should at least be aligned to NETDEV_ALIGN */ 77 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN))); 78 }; 79 80 static inline 81 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 82 { 83 BUG_ON(!wiphy); 84 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 85 } 86 87 /* Note 0 is valid, hence phy0 */ 88 static inline 89 bool wiphy_idx_valid(int wiphy_idx) 90 { 91 return (wiphy_idx >= 0); 92 } 93 94 95 extern struct workqueue_struct *cfg80211_wq; 96 extern struct mutex cfg80211_mutex; 97 extern struct list_head cfg80211_rdev_list; 98 extern int cfg80211_rdev_list_generation; 99 100 #define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex)) 101 102 /* 103 * You can use this to mark a wiphy_idx as not having an associated wiphy. 104 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL 105 */ 106 #define WIPHY_IDX_STALE -1 107 108 struct cfg80211_internal_bss { 109 struct list_head list; 110 struct rb_node rbn; 111 unsigned long ts; 112 struct kref ref; 113 atomic_t hold; 114 bool ies_allocated; 115 116 /* must be last because of priv member */ 117 struct cfg80211_bss pub; 118 }; 119 120 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 121 { 122 return container_of(pub, struct cfg80211_internal_bss, pub); 123 } 124 125 static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss) 126 { 127 kref_get(&bss->ref); 128 } 129 130 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 131 { 132 atomic_inc(&bss->hold); 133 } 134 135 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 136 { 137 int r = atomic_dec_return(&bss->hold); 138 WARN_ON(r < 0); 139 } 140 141 142 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 143 int get_wiphy_idx(struct wiphy *wiphy); 144 145 struct cfg80211_registered_device * 146 __cfg80211_rdev_from_info(struct genl_info *info); 147 148 /* 149 * This function returns a pointer to the driver 150 * that the genl_info item that is passed refers to. 151 * If successful, it returns non-NULL and also locks 152 * the driver's mutex! 153 * 154 * This means that you need to call cfg80211_unlock_rdev() 155 * before being allowed to acquire &cfg80211_mutex! 156 * 157 * This is necessary because we need to lock the global 158 * mutex to get an item off the list safely, and then 159 * we lock the rdev mutex so it doesn't go away under us. 160 * 161 * We don't want to keep cfg80211_mutex locked 162 * for all the time in order to allow requests on 163 * other interfaces to go through at the same time. 164 * 165 * The result of this can be a PTR_ERR and hence must 166 * be checked with IS_ERR() for errors. 167 */ 168 extern struct cfg80211_registered_device * 169 cfg80211_get_dev_from_info(struct genl_info *info); 170 171 /* requires cfg80211_rdev_mutex to be held! */ 172 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 173 174 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 175 extern struct cfg80211_registered_device * 176 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 177 178 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 179 struct net *net); 180 181 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 182 { 183 mutex_lock(&rdev->mtx); 184 } 185 186 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 187 { 188 BUG_ON(IS_ERR(rdev) || !rdev); 189 mutex_unlock(&rdev->mtx); 190 } 191 192 static inline void wdev_lock(struct wireless_dev *wdev) 193 __acquires(wdev) 194 { 195 mutex_lock(&wdev->mtx); 196 __acquire(wdev->mtx); 197 } 198 199 static inline void wdev_unlock(struct wireless_dev *wdev) 200 __releases(wdev) 201 { 202 __release(wdev->mtx); 203 mutex_unlock(&wdev->mtx); 204 } 205 206 #define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx)); 207 #define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx)); 208 209 enum cfg80211_event_type { 210 EVENT_CONNECT_RESULT, 211 EVENT_ROAMED, 212 EVENT_DISCONNECTED, 213 EVENT_IBSS_JOINED, 214 }; 215 216 struct cfg80211_event { 217 struct list_head list; 218 enum cfg80211_event_type type; 219 220 union { 221 struct { 222 u8 bssid[ETH_ALEN]; 223 const u8 *req_ie; 224 const u8 *resp_ie; 225 size_t req_ie_len; 226 size_t resp_ie_len; 227 u16 status; 228 } cr; 229 struct { 230 u8 bssid[ETH_ALEN]; 231 const u8 *req_ie; 232 const u8 *resp_ie; 233 size_t req_ie_len; 234 size_t resp_ie_len; 235 } rm; 236 struct { 237 const u8 *ie; 238 size_t ie_len; 239 u16 reason; 240 } dc; 241 struct { 242 u8 bssid[ETH_ALEN]; 243 } ij; 244 }; 245 }; 246 247 struct cfg80211_cached_keys { 248 struct key_params params[6]; 249 u8 data[6][WLAN_MAX_KEY_LEN]; 250 int def, defmgmt; 251 }; 252 253 254 /* free object */ 255 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 256 257 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 258 char *newname); 259 260 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 261 void wiphy_update_regulatory(struct wiphy *wiphy, 262 enum nl80211_reg_initiator setby); 263 264 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 265 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 266 unsigned long age_secs); 267 268 /* IBSS */ 269 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 270 struct net_device *dev, 271 struct cfg80211_ibss_params *params, 272 struct cfg80211_cached_keys *connkeys); 273 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 274 struct net_device *dev, 275 struct cfg80211_ibss_params *params, 276 struct cfg80211_cached_keys *connkeys); 277 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 278 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 279 struct net_device *dev, bool nowext); 280 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 281 struct net_device *dev, bool nowext); 282 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 283 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 284 struct wireless_dev *wdev); 285 286 /* MLME */ 287 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 288 struct net_device *dev, 289 struct ieee80211_channel *chan, 290 enum nl80211_auth_type auth_type, 291 const u8 *bssid, 292 const u8 *ssid, int ssid_len, 293 const u8 *ie, int ie_len, 294 const u8 *key, int key_len, int key_idx); 295 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 296 struct net_device *dev, struct ieee80211_channel *chan, 297 enum nl80211_auth_type auth_type, const u8 *bssid, 298 const u8 *ssid, int ssid_len, 299 const u8 *ie, int ie_len, 300 const u8 *key, int key_len, int key_idx); 301 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 302 struct net_device *dev, 303 struct ieee80211_channel *chan, 304 const u8 *bssid, const u8 *prev_bssid, 305 const u8 *ssid, int ssid_len, 306 const u8 *ie, int ie_len, bool use_mfp, 307 struct cfg80211_crypto_settings *crypt); 308 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 309 struct net_device *dev, struct ieee80211_channel *chan, 310 const u8 *bssid, const u8 *prev_bssid, 311 const u8 *ssid, int ssid_len, 312 const u8 *ie, int ie_len, bool use_mfp, 313 struct cfg80211_crypto_settings *crypt); 314 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 315 struct net_device *dev, const u8 *bssid, 316 const u8 *ie, int ie_len, u16 reason); 317 int 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); 320 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 321 struct net_device *dev, const u8 *bssid, 322 const u8 *ie, int ie_len, u16 reason); 323 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 324 struct net_device *dev); 325 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 326 const u8 *req_ie, size_t req_ie_len, 327 const u8 *resp_ie, size_t resp_ie_len, 328 u16 status, bool wextev, 329 struct cfg80211_bss *bss); 330 331 /* SME */ 332 int __cfg80211_connect(struct cfg80211_registered_device *rdev, 333 struct net_device *dev, 334 struct cfg80211_connect_params *connect, 335 struct cfg80211_cached_keys *connkeys, 336 const u8 *prev_bssid); 337 int cfg80211_connect(struct cfg80211_registered_device *rdev, 338 struct net_device *dev, 339 struct cfg80211_connect_params *connect, 340 struct cfg80211_cached_keys *connkeys); 341 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 342 struct net_device *dev, u16 reason, 343 bool wextev); 344 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 345 struct net_device *dev, u16 reason, 346 bool wextev); 347 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid, 348 const u8 *req_ie, size_t req_ie_len, 349 const u8 *resp_ie, size_t resp_ie_len); 350 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 351 struct wireless_dev *wdev); 352 353 void cfg80211_conn_work(struct work_struct *work); 354 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev); 355 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev); 356 357 /* internal helpers */ 358 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 359 struct key_params *params, int key_idx, 360 const u8 *mac_addr); 361 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 362 size_t ie_len, u16 reason, bool from_ap); 363 void cfg80211_sme_scan_done(struct net_device *dev); 364 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); 365 void cfg80211_sme_disassoc(struct net_device *dev, int idx); 366 void __cfg80211_scan_done(struct work_struct *wk); 367 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 368 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 369 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 370 struct net_device *dev, enum nl80211_iftype ntype, 371 u32 *flags, struct vif_params *params); 372 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 373 374 struct ieee80211_channel * 375 rdev_fixed_channel(struct cfg80211_registered_device *rdev, 376 struct wireless_dev *for_wdev); 377 int rdev_set_freq(struct cfg80211_registered_device *rdev, 378 struct wireless_dev *for_wdev, 379 int freq, enum nl80211_channel_type channel_type); 380 381 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 382 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 383 #else 384 /* 385 * Trick to enable using it as a condition, 386 * and also not give a warning when it's 387 * not used that way. 388 */ 389 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 390 #endif 391 392 #endif /* __NET_WIRELESS_CORE_H */ 393