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 <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 /* protected by devlist_mtx or RCU */ 52 struct list_head netdev_list; 53 int devlist_generation; 54 int opencount; /* also protected by devlist_mtx */ 55 wait_queue_head_t dev_wait; 56 57 u32 ap_beacons_nlpid; 58 59 /* BSSes/scanning */ 60 spinlock_t bss_lock; 61 struct list_head bss_list; 62 struct rb_root bss_tree; 63 u32 bss_generation; 64 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 65 struct cfg80211_sched_scan_request *sched_scan_req; 66 unsigned long suspend_at; 67 struct work_struct scan_done_wk; 68 struct work_struct sched_scan_results_wk; 69 70 struct mutex sched_scan_mtx; 71 72 #ifdef CONFIG_NL80211_TESTMODE 73 struct genl_info *testmode_info; 74 #endif 75 76 struct work_struct conn_work; 77 struct work_struct event_work; 78 79 struct cfg80211_wowlan *wowlan; 80 81 /* must be last because of the way we do wiphy_priv(), 82 * and it should at least be aligned to NETDEV_ALIGN */ 83 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN))); 84 }; 85 86 static inline 87 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 88 { 89 BUG_ON(!wiphy); 90 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 91 } 92 93 /* Note 0 is valid, hence phy0 */ 94 static inline 95 bool wiphy_idx_valid(int wiphy_idx) 96 { 97 return wiphy_idx >= 0; 98 } 99 100 static inline void 101 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 102 { 103 int i; 104 105 if (!rdev->wowlan) 106 return; 107 for (i = 0; i < rdev->wowlan->n_patterns; i++) 108 kfree(rdev->wowlan->patterns[i].mask); 109 kfree(rdev->wowlan->patterns); 110 kfree(rdev->wowlan); 111 } 112 113 extern struct workqueue_struct *cfg80211_wq; 114 extern struct mutex cfg80211_mutex; 115 extern struct list_head cfg80211_rdev_list; 116 extern int cfg80211_rdev_list_generation; 117 118 static inline void assert_cfg80211_lock(void) 119 { 120 lockdep_assert_held(&cfg80211_mutex); 121 } 122 123 /* 124 * You can use this to mark a wiphy_idx as not having an associated wiphy. 125 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL 126 */ 127 #define WIPHY_IDX_STALE -1 128 129 struct cfg80211_internal_bss { 130 struct list_head list; 131 struct rb_node rbn; 132 unsigned long ts; 133 struct kref ref; 134 atomic_t hold; 135 bool beacon_ies_allocated; 136 bool proberesp_ies_allocated; 137 138 /* must be last because of priv member */ 139 struct cfg80211_bss pub; 140 }; 141 142 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 143 { 144 return container_of(pub, struct cfg80211_internal_bss, pub); 145 } 146 147 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 148 { 149 atomic_inc(&bss->hold); 150 } 151 152 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 153 { 154 int r = atomic_dec_return(&bss->hold); 155 WARN_ON(r < 0); 156 } 157 158 159 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 160 int get_wiphy_idx(struct wiphy *wiphy); 161 162 struct cfg80211_registered_device * 163 __cfg80211_rdev_from_info(struct genl_info *info); 164 165 /* 166 * This function returns a pointer to the driver 167 * that the genl_info item that is passed refers to. 168 * If successful, it returns non-NULL and also locks 169 * the driver's mutex! 170 * 171 * This means that you need to call cfg80211_unlock_rdev() 172 * before being allowed to acquire &cfg80211_mutex! 173 * 174 * This is necessary because we need to lock the global 175 * mutex to get an item off the list safely, and then 176 * we lock the rdev mutex so it doesn't go away under us. 177 * 178 * We don't want to keep cfg80211_mutex locked 179 * for all the time in order to allow requests on 180 * other interfaces to go through at the same time. 181 * 182 * The result of this can be a PTR_ERR and hence must 183 * be checked with IS_ERR() for errors. 184 */ 185 extern struct cfg80211_registered_device * 186 cfg80211_get_dev_from_info(struct genl_info *info); 187 188 /* requires cfg80211_rdev_mutex to be held! */ 189 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 190 191 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 192 extern struct cfg80211_registered_device * 193 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 194 195 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 196 struct net *net); 197 198 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 199 { 200 mutex_lock(&rdev->mtx); 201 } 202 203 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 204 { 205 BUG_ON(IS_ERR(rdev) || !rdev); 206 mutex_unlock(&rdev->mtx); 207 } 208 209 static inline void wdev_lock(struct wireless_dev *wdev) 210 __acquires(wdev) 211 { 212 mutex_lock(&wdev->mtx); 213 __acquire(wdev->mtx); 214 } 215 216 static inline void wdev_unlock(struct wireless_dev *wdev) 217 __releases(wdev) 218 { 219 __release(wdev->mtx); 220 mutex_unlock(&wdev->mtx); 221 } 222 223 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx) 224 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 225 226 enum cfg80211_event_type { 227 EVENT_CONNECT_RESULT, 228 EVENT_ROAMED, 229 EVENT_DISCONNECTED, 230 EVENT_IBSS_JOINED, 231 }; 232 233 struct cfg80211_event { 234 struct list_head list; 235 enum cfg80211_event_type type; 236 237 union { 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 u16 status; 245 } cr; 246 struct { 247 const u8 *req_ie; 248 const u8 *resp_ie; 249 size_t req_ie_len; 250 size_t resp_ie_len; 251 struct cfg80211_bss *bss; 252 } rm; 253 struct { 254 const u8 *ie; 255 size_t ie_len; 256 u16 reason; 257 } dc; 258 struct { 259 u8 bssid[ETH_ALEN]; 260 } ij; 261 }; 262 }; 263 264 struct cfg80211_cached_keys { 265 struct key_params params[6]; 266 u8 data[6][WLAN_MAX_KEY_LEN]; 267 int def, defmgmt; 268 }; 269 270 271 /* free object */ 272 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 273 274 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 275 char *newname); 276 277 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 278 279 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 280 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 281 unsigned long age_secs); 282 283 /* IBSS */ 284 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 285 struct net_device *dev, 286 struct cfg80211_ibss_params *params, 287 struct cfg80211_cached_keys *connkeys); 288 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 289 struct net_device *dev, 290 struct cfg80211_ibss_params *params, 291 struct cfg80211_cached_keys *connkeys); 292 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 293 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 294 struct net_device *dev, bool nowext); 295 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 296 struct net_device *dev, bool nowext); 297 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 298 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 299 struct wireless_dev *wdev); 300 301 /* mesh */ 302 extern const struct mesh_config default_mesh_config; 303 extern const struct mesh_setup default_mesh_setup; 304 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 305 struct net_device *dev, 306 const struct mesh_setup *setup, 307 const struct mesh_config *conf); 308 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 309 struct net_device *dev, 310 const struct mesh_setup *setup, 311 const struct mesh_config *conf); 312 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 313 struct net_device *dev); 314 315 /* MLME */ 316 int __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); 324 int 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); 330 int __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); 339 int 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); 347 int __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); 351 int 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); 355 int 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); 359 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 360 struct net_device *dev); 361 void __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); 366 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 367 u16 frame_type, const u8 *match_data, 368 int match_len); 369 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 370 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 371 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 372 struct net_device *dev, 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); 378 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 379 const struct ieee80211_ht_cap *ht_capa_mask); 380 381 /* SME */ 382 int __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); 387 int cfg80211_connect(struct cfg80211_registered_device *rdev, 388 struct net_device *dev, 389 struct cfg80211_connect_params *connect, 390 struct cfg80211_cached_keys *connkeys); 391 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 392 struct net_device *dev, u16 reason, 393 bool wextev); 394 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 395 struct net_device *dev, u16 reason, 396 bool wextev); 397 void __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); 401 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 402 struct wireless_dev *wdev); 403 404 void cfg80211_conn_work(struct work_struct *work); 405 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev); 406 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev); 407 408 /* internal helpers */ 409 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 410 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 411 struct key_params *params, int key_idx, 412 bool pairwise, const u8 *mac_addr); 413 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 414 size_t ie_len, u16 reason, bool from_ap); 415 void cfg80211_sme_scan_done(struct net_device *dev); 416 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); 417 void cfg80211_sme_disassoc(struct net_device *dev, 418 struct cfg80211_internal_bss *bss); 419 void __cfg80211_scan_done(struct work_struct *wk); 420 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 421 void __cfg80211_sched_scan_results(struct work_struct *wk); 422 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 423 bool driver_initiated); 424 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 425 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 426 struct net_device *dev, enum nl80211_iftype ntype, 427 u32 *flags, struct vif_params *params); 428 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 429 430 int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, 431 struct wireless_dev *wdev, 432 enum nl80211_iftype iftype); 433 434 static inline int 435 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, 436 enum nl80211_iftype iftype) 437 { 438 return cfg80211_can_change_interface(rdev, NULL, iftype); 439 } 440 441 struct ieee80211_channel * 442 rdev_freq_to_chan(struct cfg80211_registered_device *rdev, 443 int freq, enum nl80211_channel_type channel_type); 444 int cfg80211_set_freq(struct cfg80211_registered_device *rdev, 445 struct wireless_dev *wdev, int freq, 446 enum nl80211_channel_type channel_type); 447 448 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 449 const u8 *rates, unsigned int n_rates, 450 u32 *mask); 451 452 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 453 u32 beacon_int); 454 455 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 456 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 457 #else 458 /* 459 * Trick to enable using it as a condition, 460 * and also not give a warning when it's 461 * not used that way. 462 */ 463 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 464 #endif 465 466 #endif /* __NET_WIRELESS_CORE_H */ 467