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/rbtree.h> 12 #include <linux/debugfs.h> 13 #include <linux/rfkill.h> 14 #include <linux/workqueue.h> 15 #include <linux/rtnetlink.h> 16 #include <net/genetlink.h> 17 #include <net/cfg80211.h> 18 #include "reg.h" 19 20 21 #define WIPHY_IDX_INVALID -1 22 23 struct cfg80211_registered_device { 24 const struct cfg80211_ops *ops; 25 struct list_head list; 26 /* we hold this mutex during any call so that 27 * we cannot do multiple calls at once, and also 28 * to avoid the deregister call to proceed while 29 * any call is in progress */ 30 struct mutex mtx; 31 32 /* rfkill support */ 33 struct rfkill_ops rfkill_ops; 34 struct rfkill *rfkill; 35 struct work_struct rfkill_sync; 36 37 /* ISO / IEC 3166 alpha2 for which this device is receiving 38 * country IEs on, this can help disregard country IEs from APs 39 * on the same alpha2 quickly. The alpha2 may differ from 40 * cfg80211_regdomain's alpha2 when an intersection has occurred. 41 * If the AP is reconfigured this can also be used to tell us if 42 * the country on the country IE changed. */ 43 char country_ie_alpha2[2]; 44 45 /* If a Country IE has been received this tells us the environment 46 * which its telling us its in. This defaults to ENVIRON_ANY */ 47 enum environment_cap env; 48 49 /* wiphy index, internal only */ 50 int wiphy_idx; 51 52 /* associated wireless interfaces */ 53 struct mutex devlist_mtx; 54 /* protected by devlist_mtx or RCU */ 55 struct list_head wdev_list; 56 int devlist_generation, wdev_id; 57 int opencount; /* also protected by devlist_mtx */ 58 wait_queue_head_t dev_wait; 59 60 struct list_head beacon_registrations; 61 spinlock_t beacon_registrations_lock; 62 63 /* protected by RTNL only */ 64 int num_running_ifaces; 65 int num_running_monitor_ifaces; 66 67 /* BSSes/scanning */ 68 spinlock_t bss_lock; 69 struct list_head bss_list; 70 struct rb_root bss_tree; 71 u32 bss_generation; 72 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 73 struct cfg80211_sched_scan_request *sched_scan_req; 74 unsigned long suspend_at; 75 struct work_struct scan_done_wk; 76 struct work_struct sched_scan_results_wk; 77 78 struct mutex sched_scan_mtx; 79 80 #ifdef CONFIG_NL80211_TESTMODE 81 struct genl_info *testmode_info; 82 #endif 83 84 struct work_struct conn_work; 85 struct work_struct event_work; 86 87 struct cfg80211_wowlan *wowlan; 88 89 struct delayed_work dfs_update_channels_wk; 90 91 /* must be last because of the way we do wiphy_priv(), 92 * and it should at least be aligned to NETDEV_ALIGN */ 93 struct wiphy wiphy __aligned(NETDEV_ALIGN); 94 }; 95 96 static inline 97 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 98 { 99 BUG_ON(!wiphy); 100 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 101 } 102 103 static inline void 104 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 105 { 106 int i; 107 108 if (!rdev->wowlan) 109 return; 110 for (i = 0; i < rdev->wowlan->n_patterns; i++) 111 kfree(rdev->wowlan->patterns[i].mask); 112 kfree(rdev->wowlan->patterns); 113 if (rdev->wowlan->tcp && rdev->wowlan->tcp->sock) 114 sock_release(rdev->wowlan->tcp->sock); 115 kfree(rdev->wowlan->tcp); 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 struct cfg80211_internal_bss { 130 struct list_head list; 131 struct list_head hidden_list; 132 struct rb_node rbn; 133 unsigned long ts; 134 unsigned long refcount; 135 atomic_t hold; 136 137 /* must be last because of priv member */ 138 struct cfg80211_bss pub; 139 }; 140 141 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 142 { 143 return container_of(pub, struct cfg80211_internal_bss, pub); 144 } 145 146 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 147 { 148 atomic_inc(&bss->hold); 149 } 150 151 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 152 { 153 int r = atomic_dec_return(&bss->hold); 154 WARN_ON(r < 0); 155 } 156 157 158 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 159 int get_wiphy_idx(struct wiphy *wiphy); 160 161 /* requires cfg80211_rdev_mutex to be held! */ 162 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 163 164 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 165 extern struct cfg80211_registered_device * 166 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 167 168 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 169 struct net *net); 170 171 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 172 { 173 mutex_lock(&rdev->mtx); 174 } 175 176 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 177 { 178 BUG_ON(IS_ERR(rdev) || !rdev); 179 mutex_unlock(&rdev->mtx); 180 } 181 182 static inline void wdev_lock(struct wireless_dev *wdev) 183 __acquires(wdev) 184 { 185 mutex_lock(&wdev->mtx); 186 __acquire(wdev->mtx); 187 } 188 189 static inline void wdev_unlock(struct wireless_dev *wdev) 190 __releases(wdev) 191 { 192 __release(wdev->mtx); 193 mutex_unlock(&wdev->mtx); 194 } 195 196 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx) 197 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 198 199 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 200 { 201 ASSERT_RTNL(); 202 203 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 204 rdev->num_running_ifaces > 0; 205 } 206 207 enum cfg80211_event_type { 208 EVENT_CONNECT_RESULT, 209 EVENT_ROAMED, 210 EVENT_DISCONNECTED, 211 EVENT_IBSS_JOINED, 212 }; 213 214 struct cfg80211_event { 215 struct list_head list; 216 enum cfg80211_event_type type; 217 218 union { 219 struct { 220 u8 bssid[ETH_ALEN]; 221 const u8 *req_ie; 222 const u8 *resp_ie; 223 size_t req_ie_len; 224 size_t resp_ie_len; 225 u16 status; 226 } cr; 227 struct { 228 const u8 *req_ie; 229 const u8 *resp_ie; 230 size_t req_ie_len; 231 size_t resp_ie_len; 232 struct cfg80211_bss *bss; 233 } rm; 234 struct { 235 const u8 *ie; 236 size_t ie_len; 237 u16 reason; 238 } dc; 239 struct { 240 u8 bssid[ETH_ALEN]; 241 } ij; 242 }; 243 }; 244 245 struct cfg80211_cached_keys { 246 struct key_params params[6]; 247 u8 data[6][WLAN_MAX_KEY_LEN]; 248 int def, defmgmt; 249 }; 250 251 enum cfg80211_chan_mode { 252 CHAN_MODE_UNDEFINED, 253 CHAN_MODE_SHARED, 254 CHAN_MODE_EXCLUSIVE, 255 }; 256 257 struct cfg80211_beacon_registration { 258 struct list_head list; 259 u32 nlportid; 260 }; 261 262 /* free object */ 263 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 264 265 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 266 char *newname); 267 268 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 269 270 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 271 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 272 unsigned long age_secs); 273 274 /* IBSS */ 275 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 276 struct net_device *dev, 277 struct cfg80211_ibss_params *params, 278 struct cfg80211_cached_keys *connkeys); 279 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 280 struct net_device *dev, 281 struct cfg80211_ibss_params *params, 282 struct cfg80211_cached_keys *connkeys); 283 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 284 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 285 struct net_device *dev, bool nowext); 286 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 287 struct net_device *dev, bool nowext); 288 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 289 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 290 struct wireless_dev *wdev); 291 292 /* mesh */ 293 extern const struct mesh_config default_mesh_config; 294 extern const struct mesh_setup default_mesh_setup; 295 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 296 struct net_device *dev, 297 struct mesh_setup *setup, 298 const struct mesh_config *conf); 299 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 300 struct net_device *dev, 301 struct mesh_setup *setup, 302 const struct mesh_config *conf); 303 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 304 struct net_device *dev); 305 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 306 struct wireless_dev *wdev, 307 struct cfg80211_chan_def *chandef); 308 309 /* AP */ 310 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 311 struct net_device *dev); 312 313 /* MLME */ 314 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 315 struct net_device *dev, 316 struct ieee80211_channel *chan, 317 enum nl80211_auth_type auth_type, 318 const u8 *bssid, 319 const u8 *ssid, int ssid_len, 320 const u8 *ie, int ie_len, 321 const u8 *key, int key_len, int key_idx, 322 const u8 *sae_data, int sae_data_len); 323 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 324 struct net_device *dev, struct ieee80211_channel *chan, 325 enum nl80211_auth_type auth_type, const u8 *bssid, 326 const u8 *ssid, int ssid_len, 327 const u8 *ie, int ie_len, 328 const u8 *key, int key_len, int key_idx, 329 const u8 *sae_data, int sae_data_len); 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 wireless_dev *wdev, 373 struct ieee80211_channel *chan, bool offchan, 374 unsigned int wait, const u8 *buf, size_t len, 375 bool no_cck, bool dont_wait_for_ack, u64 *cookie); 376 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 377 const struct ieee80211_ht_cap *ht_capa_mask); 378 379 /* SME */ 380 int __cfg80211_connect(struct cfg80211_registered_device *rdev, 381 struct net_device *dev, 382 struct cfg80211_connect_params *connect, 383 struct cfg80211_cached_keys *connkeys, 384 const u8 *prev_bssid); 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 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 390 struct net_device *dev, u16 reason, 391 bool wextev); 392 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 393 struct net_device *dev, u16 reason, 394 bool wextev); 395 void __cfg80211_roamed(struct wireless_dev *wdev, 396 struct cfg80211_bss *bss, 397 const u8 *req_ie, size_t req_ie_len, 398 const u8 *resp_ie, size_t resp_ie_len); 399 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 400 struct wireless_dev *wdev); 401 402 void cfg80211_conn_work(struct work_struct *work); 403 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev); 404 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev); 405 406 /* internal helpers */ 407 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 408 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 409 struct key_params *params, int key_idx, 410 bool pairwise, const u8 *mac_addr); 411 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 412 size_t ie_len, u16 reason, bool from_ap); 413 void cfg80211_sme_scan_done(struct net_device *dev); 414 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); 415 void cfg80211_sme_disassoc(struct net_device *dev, 416 struct cfg80211_internal_bss *bss); 417 void __cfg80211_scan_done(struct work_struct *wk); 418 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 419 void __cfg80211_sched_scan_results(struct work_struct *wk); 420 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 421 bool driver_initiated); 422 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 423 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 424 struct net_device *dev, enum nl80211_iftype ntype, 425 u32 *flags, struct vif_params *params); 426 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 427 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 428 429 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 430 struct wireless_dev *wdev, 431 enum nl80211_iftype iftype, 432 struct ieee80211_channel *chan, 433 enum cfg80211_chan_mode chanmode, 434 u8 radar_detect); 435 436 /** 437 * cfg80211_chandef_dfs_required - checks if radar detection is required 438 * @wiphy: the wiphy to validate against 439 * @chandef: the channel definition to check 440 * Return: 1 if radar detection is required, 0 if it is not, < 0 on error 441 */ 442 int cfg80211_chandef_dfs_required(struct wiphy *wiphy, 443 const struct cfg80211_chan_def *c); 444 445 void cfg80211_set_dfs_state(struct wiphy *wiphy, 446 const struct cfg80211_chan_def *chandef, 447 enum nl80211_dfs_state dfs_state); 448 449 void cfg80211_dfs_channels_update_work(struct work_struct *work); 450 451 452 static inline int 453 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, 454 struct wireless_dev *wdev, 455 enum nl80211_iftype iftype) 456 { 457 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL, 458 CHAN_MODE_UNDEFINED, 0); 459 } 460 461 static inline int 462 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, 463 enum nl80211_iftype iftype) 464 { 465 return cfg80211_can_change_interface(rdev, NULL, iftype); 466 } 467 468 static inline int 469 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev, 470 struct wireless_dev *wdev, 471 struct ieee80211_channel *chan, 472 enum cfg80211_chan_mode chanmode) 473 { 474 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, 475 chan, chanmode, 0); 476 } 477 478 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 479 { 480 unsigned long end = jiffies; 481 482 if (end >= start) 483 return jiffies_to_msecs(end - start); 484 485 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); 486 } 487 488 void 489 cfg80211_get_chan_state(struct wireless_dev *wdev, 490 struct ieee80211_channel **chan, 491 enum cfg80211_chan_mode *chanmode); 492 493 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 494 struct cfg80211_chan_def *chandef); 495 496 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 497 const u8 *rates, unsigned int n_rates, 498 u32 *mask); 499 500 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 501 u32 beacon_int); 502 503 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 504 enum nl80211_iftype iftype, int num); 505 506 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 507 508 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 509 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 510 #else 511 /* 512 * Trick to enable using it as a condition, 513 * and also not give a warning when it's 514 * not used that way. 515 */ 516 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 517 #endif 518 519 #endif /* __NET_WIRELESS_CORE_H */ 520