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 <linux/rtnetlink.h> 17 #include <net/genetlink.h> 18 #include <net/cfg80211.h> 19 #include "reg.h" 20 21 struct cfg80211_registered_device { 22 const struct cfg80211_ops *ops; 23 struct list_head list; 24 /* we hold this mutex during any call so that 25 * we cannot do multiple calls at once, and also 26 * to avoid the deregister call to proceed while 27 * any call is in progress */ 28 struct mutex mtx; 29 30 /* rfkill support */ 31 struct rfkill_ops rfkill_ops; 32 struct rfkill *rfkill; 33 struct work_struct rfkill_sync; 34 35 /* ISO / IEC 3166 alpha2 for which this device is receiving 36 * country IEs on, this can help disregard country IEs from APs 37 * on the same alpha2 quickly. The alpha2 may differ from 38 * cfg80211_regdomain's alpha2 when an intersection has occurred. 39 * If the AP is reconfigured this can also be used to tell us if 40 * the country on the country IE changed. */ 41 char country_ie_alpha2[2]; 42 43 /* If a Country IE has been received this tells us the environment 44 * which its telling us its in. This defaults to ENVIRON_ANY */ 45 enum environment_cap env; 46 47 /* wiphy index, internal only */ 48 int wiphy_idx; 49 50 /* associated wireless interfaces */ 51 struct mutex devlist_mtx; 52 /* protected by devlist_mtx or RCU */ 53 struct list_head wdev_list; 54 int devlist_generation, wdev_id; 55 int opencount; /* also protected by devlist_mtx */ 56 wait_queue_head_t dev_wait; 57 58 struct list_head beacon_registrations; 59 spinlock_t beacon_registrations_lock; 60 61 /* protected by RTNL only */ 62 int num_running_ifaces; 63 int num_running_monitor_ifaces; 64 65 /* BSSes/scanning */ 66 spinlock_t bss_lock; 67 struct list_head bss_list; 68 struct rb_root bss_tree; 69 u32 bss_generation; 70 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 71 struct cfg80211_sched_scan_request *sched_scan_req; 72 unsigned long suspend_at; 73 struct work_struct scan_done_wk; 74 struct work_struct sched_scan_results_wk; 75 76 struct mutex sched_scan_mtx; 77 78 #ifdef CONFIG_NL80211_TESTMODE 79 struct genl_info *testmode_info; 80 #endif 81 82 struct work_struct conn_work; 83 struct work_struct event_work; 84 85 struct cfg80211_wowlan *wowlan; 86 87 /* must be last because of the way we do wiphy_priv(), 88 * and it should at least be aligned to NETDEV_ALIGN */ 89 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN))); 90 }; 91 92 static inline 93 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 94 { 95 BUG_ON(!wiphy); 96 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 97 } 98 99 /* Note 0 is valid, hence phy0 */ 100 static inline 101 bool wiphy_idx_valid(int wiphy_idx) 102 { 103 return wiphy_idx >= 0; 104 } 105 106 static inline void 107 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 108 { 109 int i; 110 111 if (!rdev->wowlan) 112 return; 113 for (i = 0; i < rdev->wowlan->n_patterns; i++) 114 kfree(rdev->wowlan->patterns[i].mask); 115 kfree(rdev->wowlan->patterns); 116 kfree(rdev->wowlan); 117 } 118 119 extern struct workqueue_struct *cfg80211_wq; 120 extern struct mutex cfg80211_mutex; 121 extern struct list_head cfg80211_rdev_list; 122 extern int cfg80211_rdev_list_generation; 123 124 static inline void assert_cfg80211_lock(void) 125 { 126 lockdep_assert_held(&cfg80211_mutex); 127 } 128 129 /* 130 * You can use this to mark a wiphy_idx as not having an associated wiphy. 131 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL 132 */ 133 #define WIPHY_IDX_STALE -1 134 135 struct cfg80211_internal_bss { 136 struct list_head list; 137 struct rb_node rbn; 138 unsigned long ts; 139 struct kref ref; 140 atomic_t hold; 141 142 /* must be last because of priv member */ 143 struct cfg80211_bss pub; 144 }; 145 146 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 147 { 148 return container_of(pub, struct cfg80211_internal_bss, pub); 149 } 150 151 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 152 { 153 atomic_inc(&bss->hold); 154 } 155 156 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 157 { 158 int r = atomic_dec_return(&bss->hold); 159 WARN_ON(r < 0); 160 } 161 162 163 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 164 int get_wiphy_idx(struct wiphy *wiphy); 165 166 /* requires cfg80211_rdev_mutex to be held! */ 167 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 168 169 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 170 extern struct cfg80211_registered_device * 171 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 172 173 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 174 struct net *net); 175 176 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 177 { 178 mutex_lock(&rdev->mtx); 179 } 180 181 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 182 { 183 BUG_ON(IS_ERR(rdev) || !rdev); 184 mutex_unlock(&rdev->mtx); 185 } 186 187 static inline void wdev_lock(struct wireless_dev *wdev) 188 __acquires(wdev) 189 { 190 mutex_lock(&wdev->mtx); 191 __acquire(wdev->mtx); 192 } 193 194 static inline void wdev_unlock(struct wireless_dev *wdev) 195 __releases(wdev) 196 { 197 __release(wdev->mtx); 198 mutex_unlock(&wdev->mtx); 199 } 200 201 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx) 202 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 203 204 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 205 { 206 ASSERT_RTNL(); 207 208 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 209 rdev->num_running_ifaces > 0; 210 } 211 212 enum cfg80211_event_type { 213 EVENT_CONNECT_RESULT, 214 EVENT_ROAMED, 215 EVENT_DISCONNECTED, 216 EVENT_IBSS_JOINED, 217 }; 218 219 struct cfg80211_event { 220 struct list_head list; 221 enum cfg80211_event_type type; 222 223 union { 224 struct { 225 u8 bssid[ETH_ALEN]; 226 const u8 *req_ie; 227 const u8 *resp_ie; 228 size_t req_ie_len; 229 size_t resp_ie_len; 230 u16 status; 231 } cr; 232 struct { 233 const u8 *req_ie; 234 const u8 *resp_ie; 235 size_t req_ie_len; 236 size_t resp_ie_len; 237 struct cfg80211_bss *bss; 238 } rm; 239 struct { 240 const u8 *ie; 241 size_t ie_len; 242 u16 reason; 243 } dc; 244 struct { 245 u8 bssid[ETH_ALEN]; 246 } ij; 247 }; 248 }; 249 250 struct cfg80211_cached_keys { 251 struct key_params params[6]; 252 u8 data[6][WLAN_MAX_KEY_LEN]; 253 int def, defmgmt; 254 }; 255 256 enum cfg80211_chan_mode { 257 CHAN_MODE_UNDEFINED, 258 CHAN_MODE_SHARED, 259 CHAN_MODE_EXCLUSIVE, 260 }; 261 262 struct cfg80211_beacon_registration { 263 struct list_head list; 264 u32 nlportid; 265 }; 266 267 /* free object */ 268 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 269 270 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 271 char *newname); 272 273 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 274 275 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 276 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 277 unsigned long age_secs); 278 279 /* IBSS */ 280 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 281 struct net_device *dev, 282 struct cfg80211_ibss_params *params, 283 struct cfg80211_cached_keys *connkeys); 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 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 289 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 290 struct net_device *dev, bool nowext); 291 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 292 struct net_device *dev, bool nowext); 293 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 294 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 295 struct wireless_dev *wdev); 296 297 /* mesh */ 298 extern const struct mesh_config default_mesh_config; 299 extern const struct mesh_setup default_mesh_setup; 300 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 301 struct net_device *dev, 302 struct mesh_setup *setup, 303 const struct mesh_config *conf); 304 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 305 struct net_device *dev, 306 struct mesh_setup *setup, 307 const struct mesh_config *conf); 308 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 309 struct net_device *dev); 310 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 311 struct wireless_dev *wdev, 312 struct cfg80211_chan_def *chandef); 313 314 /* AP */ 315 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 316 struct net_device *dev); 317 318 /* MLME */ 319 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 320 struct net_device *dev, 321 struct ieee80211_channel *chan, 322 enum nl80211_auth_type auth_type, 323 const u8 *bssid, 324 const u8 *ssid, int ssid_len, 325 const u8 *ie, int ie_len, 326 const u8 *key, int key_len, int key_idx, 327 const u8 *sae_data, int sae_data_len); 328 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 329 struct net_device *dev, struct ieee80211_channel *chan, 330 enum nl80211_auth_type auth_type, const u8 *bssid, 331 const u8 *ssid, int ssid_len, 332 const u8 *ie, int ie_len, 333 const u8 *key, int key_len, int key_idx, 334 const u8 *sae_data, int sae_data_len); 335 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 336 struct net_device *dev, 337 struct ieee80211_channel *chan, 338 const u8 *bssid, const u8 *prev_bssid, 339 const u8 *ssid, int ssid_len, 340 const u8 *ie, int ie_len, bool use_mfp, 341 struct cfg80211_crypto_settings *crypt, 342 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa, 343 struct ieee80211_ht_cap *ht_capa_mask); 344 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 345 struct net_device *dev, struct ieee80211_channel *chan, 346 const u8 *bssid, const u8 *prev_bssid, 347 const u8 *ssid, int ssid_len, 348 const u8 *ie, int ie_len, bool use_mfp, 349 struct cfg80211_crypto_settings *crypt, 350 u32 assoc_flags, struct ieee80211_ht_cap *ht_capa, 351 struct ieee80211_ht_cap *ht_capa_mask); 352 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 353 struct net_device *dev, const u8 *bssid, 354 const u8 *ie, int ie_len, u16 reason, 355 bool local_state_change); 356 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 357 struct net_device *dev, const u8 *bssid, 358 const u8 *ie, int ie_len, u16 reason, 359 bool local_state_change); 360 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 361 struct net_device *dev, const u8 *bssid, 362 const u8 *ie, int ie_len, u16 reason, 363 bool local_state_change); 364 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 365 struct net_device *dev); 366 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 367 const u8 *req_ie, size_t req_ie_len, 368 const u8 *resp_ie, size_t resp_ie_len, 369 u16 status, bool wextev, 370 struct cfg80211_bss *bss); 371 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 372 u16 frame_type, const u8 *match_data, 373 int match_len); 374 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 375 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 376 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 377 struct wireless_dev *wdev, 378 struct ieee80211_channel *chan, bool offchan, 379 unsigned int wait, const u8 *buf, size_t len, 380 bool no_cck, bool dont_wait_for_ack, u64 *cookie); 381 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 382 const struct ieee80211_ht_cap *ht_capa_mask); 383 384 /* SME */ 385 int __cfg80211_connect(struct cfg80211_registered_device *rdev, 386 struct net_device *dev, 387 struct cfg80211_connect_params *connect, 388 struct cfg80211_cached_keys *connkeys, 389 const u8 *prev_bssid); 390 int cfg80211_connect(struct cfg80211_registered_device *rdev, 391 struct net_device *dev, 392 struct cfg80211_connect_params *connect, 393 struct cfg80211_cached_keys *connkeys); 394 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 395 struct net_device *dev, u16 reason, 396 bool wextev); 397 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 398 struct net_device *dev, u16 reason, 399 bool wextev); 400 void __cfg80211_roamed(struct wireless_dev *wdev, 401 struct cfg80211_bss *bss, 402 const u8 *req_ie, size_t req_ie_len, 403 const u8 *resp_ie, size_t resp_ie_len); 404 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 405 struct wireless_dev *wdev); 406 407 void cfg80211_conn_work(struct work_struct *work); 408 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev); 409 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev); 410 411 /* internal helpers */ 412 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 413 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 414 struct key_params *params, int key_idx, 415 bool pairwise, const u8 *mac_addr); 416 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 417 size_t ie_len, u16 reason, bool from_ap); 418 void cfg80211_sme_scan_done(struct net_device *dev); 419 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); 420 void cfg80211_sme_disassoc(struct net_device *dev, 421 struct cfg80211_internal_bss *bss); 422 void __cfg80211_scan_done(struct work_struct *wk); 423 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 424 void __cfg80211_sched_scan_results(struct work_struct *wk); 425 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 426 bool driver_initiated); 427 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 428 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 429 struct net_device *dev, enum nl80211_iftype ntype, 430 u32 *flags, struct vif_params *params); 431 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 432 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 433 434 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 435 struct wireless_dev *wdev, 436 enum nl80211_iftype iftype, 437 struct ieee80211_channel *chan, 438 enum cfg80211_chan_mode chanmode); 439 440 static inline int 441 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, 442 struct wireless_dev *wdev, 443 enum nl80211_iftype iftype) 444 { 445 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL, 446 CHAN_MODE_UNDEFINED); 447 } 448 449 static inline int 450 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, 451 enum nl80211_iftype iftype) 452 { 453 return cfg80211_can_change_interface(rdev, NULL, iftype); 454 } 455 456 static inline int 457 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev, 458 struct wireless_dev *wdev, 459 struct ieee80211_channel *chan, 460 enum cfg80211_chan_mode chanmode) 461 { 462 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, 463 chan, chanmode); 464 } 465 466 void 467 cfg80211_get_chan_state(struct wireless_dev *wdev, 468 struct ieee80211_channel **chan, 469 enum cfg80211_chan_mode *chanmode); 470 471 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 472 struct cfg80211_chan_def *chandef); 473 474 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 475 const u8 *rates, unsigned int n_rates, 476 u32 *mask); 477 478 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 479 u32 beacon_int); 480 481 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 482 enum nl80211_iftype iftype, int num); 483 484 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 485 486 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 487 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 488 #else 489 /* 490 * Trick to enable using it as a condition, 491 * and also not give a warning when it's 492 * not used that way. 493 */ 494 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 495 #endif 496 497 #endif /* __NET_WIRELESS_CORE_H */ 498