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 u32 ap_beacons_nlpid; 59 60 /* protected by RTNL only */ 61 int num_running_ifaces; 62 int num_running_monitor_ifaces; 63 64 /* BSSes/scanning */ 65 spinlock_t bss_lock; 66 struct list_head bss_list; 67 struct rb_root bss_tree; 68 u32 bss_generation; 69 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 70 struct cfg80211_sched_scan_request *sched_scan_req; 71 unsigned long suspend_at; 72 struct work_struct scan_done_wk; 73 struct work_struct sched_scan_results_wk; 74 75 struct mutex sched_scan_mtx; 76 77 #ifdef CONFIG_NL80211_TESTMODE 78 struct genl_info *testmode_info; 79 #endif 80 81 struct work_struct conn_work; 82 struct work_struct event_work; 83 84 struct cfg80211_wowlan *wowlan; 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 static inline void 106 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 107 { 108 int i; 109 110 if (!rdev->wowlan) 111 return; 112 for (i = 0; i < rdev->wowlan->n_patterns; i++) 113 kfree(rdev->wowlan->patterns[i].mask); 114 kfree(rdev->wowlan->patterns); 115 kfree(rdev->wowlan); 116 } 117 118 extern struct workqueue_struct *cfg80211_wq; 119 extern struct mutex cfg80211_mutex; 120 extern struct list_head cfg80211_rdev_list; 121 extern int cfg80211_rdev_list_generation; 122 123 static inline void assert_cfg80211_lock(void) 124 { 125 lockdep_assert_held(&cfg80211_mutex); 126 } 127 128 /* 129 * You can use this to mark a wiphy_idx as not having an associated wiphy. 130 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL 131 */ 132 #define WIPHY_IDX_STALE -1 133 134 struct cfg80211_internal_bss { 135 struct list_head list; 136 struct rb_node rbn; 137 unsigned long ts; 138 struct kref ref; 139 atomic_t hold; 140 bool beacon_ies_allocated; 141 bool proberesp_ies_allocated; 142 143 /* must be last because of priv member */ 144 struct cfg80211_bss pub; 145 }; 146 147 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 148 { 149 return container_of(pub, struct cfg80211_internal_bss, pub); 150 } 151 152 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 153 { 154 atomic_inc(&bss->hold); 155 } 156 157 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 158 { 159 int r = atomic_dec_return(&bss->hold); 160 WARN_ON(r < 0); 161 } 162 163 164 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 165 int get_wiphy_idx(struct wiphy *wiphy); 166 167 /* requires cfg80211_rdev_mutex to be held! */ 168 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 169 170 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 171 extern struct cfg80211_registered_device * 172 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 173 174 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 175 struct net *net); 176 177 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 178 { 179 mutex_lock(&rdev->mtx); 180 } 181 182 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 183 { 184 BUG_ON(IS_ERR(rdev) || !rdev); 185 mutex_unlock(&rdev->mtx); 186 } 187 188 static inline void wdev_lock(struct wireless_dev *wdev) 189 __acquires(wdev) 190 { 191 mutex_lock(&wdev->mtx); 192 __acquire(wdev->mtx); 193 } 194 195 static inline void wdev_unlock(struct wireless_dev *wdev) 196 __releases(wdev) 197 { 198 __release(wdev->mtx); 199 mutex_unlock(&wdev->mtx); 200 } 201 202 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx) 203 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 204 205 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 206 { 207 ASSERT_RTNL(); 208 209 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 210 rdev->num_running_ifaces > 0; 211 } 212 213 enum cfg80211_event_type { 214 EVENT_CONNECT_RESULT, 215 EVENT_ROAMED, 216 EVENT_DISCONNECTED, 217 EVENT_IBSS_JOINED, 218 }; 219 220 struct cfg80211_event { 221 struct list_head list; 222 enum cfg80211_event_type type; 223 224 union { 225 struct { 226 u8 bssid[ETH_ALEN]; 227 const u8 *req_ie; 228 const u8 *resp_ie; 229 size_t req_ie_len; 230 size_t resp_ie_len; 231 u16 status; 232 } cr; 233 struct { 234 const u8 *req_ie; 235 const u8 *resp_ie; 236 size_t req_ie_len; 237 size_t resp_ie_len; 238 struct cfg80211_bss *bss; 239 } rm; 240 struct { 241 const u8 *ie; 242 size_t ie_len; 243 u16 reason; 244 } dc; 245 struct { 246 u8 bssid[ETH_ALEN]; 247 } ij; 248 }; 249 }; 250 251 struct cfg80211_cached_keys { 252 struct key_params params[6]; 253 u8 data[6][WLAN_MAX_KEY_LEN]; 254 int def, defmgmt; 255 }; 256 257 enum cfg80211_chan_mode { 258 CHAN_MODE_UNDEFINED, 259 CHAN_MODE_SHARED, 260 CHAN_MODE_EXCLUSIVE, 261 }; 262 263 264 /* free object */ 265 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 266 267 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 268 char *newname); 269 270 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 271 272 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 273 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 274 unsigned long age_secs); 275 276 /* IBSS */ 277 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 278 struct net_device *dev, 279 struct cfg80211_ibss_params *params, 280 struct cfg80211_cached_keys *connkeys); 281 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 282 struct net_device *dev, 283 struct cfg80211_ibss_params *params, 284 struct cfg80211_cached_keys *connkeys); 285 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 286 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 287 struct net_device *dev, bool nowext); 288 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 289 struct net_device *dev, bool nowext); 290 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 291 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 292 struct wireless_dev *wdev); 293 294 /* mesh */ 295 extern const struct mesh_config default_mesh_config; 296 extern const struct mesh_setup default_mesh_setup; 297 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 298 struct net_device *dev, 299 struct mesh_setup *setup, 300 const struct mesh_config *conf); 301 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 302 struct net_device *dev, 303 struct mesh_setup *setup, 304 const struct mesh_config *conf); 305 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 306 struct net_device *dev); 307 int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev, 308 struct wireless_dev *wdev, int freq, 309 enum nl80211_channel_type channel_type); 310 311 /* AP */ 312 int cfg80211_stop_ap(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 wireless_dev *wdev, 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 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 430 431 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 432 struct wireless_dev *wdev, 433 enum nl80211_iftype iftype, 434 struct ieee80211_channel *chan, 435 enum cfg80211_chan_mode chanmode); 436 437 static inline int 438 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, 439 struct wireless_dev *wdev, 440 enum nl80211_iftype iftype) 441 { 442 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL, 443 CHAN_MODE_UNDEFINED); 444 } 445 446 static inline int 447 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, 448 enum nl80211_iftype iftype) 449 { 450 return cfg80211_can_change_interface(rdev, NULL, iftype); 451 } 452 453 static inline int 454 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev, 455 struct wireless_dev *wdev, 456 struct ieee80211_channel *chan, 457 enum cfg80211_chan_mode chanmode) 458 { 459 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, 460 chan, chanmode); 461 } 462 463 void 464 cfg80211_get_chan_state(struct wireless_dev *wdev, 465 struct ieee80211_channel **chan, 466 enum cfg80211_chan_mode *chanmode); 467 468 struct ieee80211_channel * 469 rdev_freq_to_chan(struct cfg80211_registered_device *rdev, 470 int freq, enum nl80211_channel_type channel_type); 471 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 472 int freq, enum nl80211_channel_type chantype); 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