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 /* netlink port which started critical protocol (0 means not started) */ 92 u32 crit_proto_nlportid; 93 94 /* must be last because of the way we do wiphy_priv(), 95 * and it should at least be aligned to NETDEV_ALIGN */ 96 struct wiphy wiphy __aligned(NETDEV_ALIGN); 97 }; 98 99 static inline 100 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 101 { 102 BUG_ON(!wiphy); 103 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 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 if (rdev->wowlan->tcp && rdev->wowlan->tcp->sock) 117 sock_release(rdev->wowlan->tcp->sock); 118 kfree(rdev->wowlan->tcp); 119 kfree(rdev->wowlan); 120 } 121 122 extern struct workqueue_struct *cfg80211_wq; 123 extern struct mutex cfg80211_mutex; 124 extern struct list_head cfg80211_rdev_list; 125 extern int cfg80211_rdev_list_generation; 126 127 static inline void assert_cfg80211_lock(void) 128 { 129 lockdep_assert_held(&cfg80211_mutex); 130 } 131 132 struct cfg80211_internal_bss { 133 struct list_head list; 134 struct list_head hidden_list; 135 struct rb_node rbn; 136 unsigned long ts; 137 unsigned long refcount; 138 atomic_t hold; 139 140 /* must be last because of priv member */ 141 struct cfg80211_bss pub; 142 }; 143 144 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 145 { 146 return container_of(pub, struct cfg80211_internal_bss, pub); 147 } 148 149 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 150 { 151 atomic_inc(&bss->hold); 152 } 153 154 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 155 { 156 int r = atomic_dec_return(&bss->hold); 157 WARN_ON(r < 0); 158 } 159 160 161 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 162 int get_wiphy_idx(struct wiphy *wiphy); 163 164 /* requires cfg80211_rdev_mutex to be held! */ 165 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 166 167 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 168 extern struct cfg80211_registered_device * 169 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 170 171 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 172 struct net *net); 173 174 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 175 { 176 mutex_lock(&rdev->mtx); 177 } 178 179 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 180 { 181 BUG_ON(IS_ERR(rdev) || !rdev); 182 mutex_unlock(&rdev->mtx); 183 } 184 185 static inline void wdev_lock(struct wireless_dev *wdev) 186 __acquires(wdev) 187 { 188 mutex_lock(&wdev->mtx); 189 __acquire(wdev->mtx); 190 } 191 192 static inline void wdev_unlock(struct wireless_dev *wdev) 193 __releases(wdev) 194 { 195 __release(wdev->mtx); 196 mutex_unlock(&wdev->mtx); 197 } 198 199 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx) 200 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 201 202 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 203 { 204 ASSERT_RTNL(); 205 206 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 207 rdev->num_running_ifaces > 0; 208 } 209 210 enum cfg80211_event_type { 211 EVENT_CONNECT_RESULT, 212 EVENT_ROAMED, 213 EVENT_DISCONNECTED, 214 EVENT_IBSS_JOINED, 215 }; 216 217 struct cfg80211_event { 218 struct list_head list; 219 enum cfg80211_event_type type; 220 221 union { 222 struct { 223 u8 bssid[ETH_ALEN]; 224 const u8 *req_ie; 225 const u8 *resp_ie; 226 size_t req_ie_len; 227 size_t resp_ie_len; 228 u16 status; 229 } cr; 230 struct { 231 const u8 *req_ie; 232 const u8 *resp_ie; 233 size_t req_ie_len; 234 size_t resp_ie_len; 235 struct cfg80211_bss *bss; 236 } rm; 237 struct { 238 const u8 *ie; 239 size_t ie_len; 240 u16 reason; 241 } dc; 242 struct { 243 u8 bssid[ETH_ALEN]; 244 } ij; 245 }; 246 }; 247 248 struct cfg80211_cached_keys { 249 struct key_params params[6]; 250 u8 data[6][WLAN_MAX_KEY_LEN]; 251 int def, defmgmt; 252 }; 253 254 enum cfg80211_chan_mode { 255 CHAN_MODE_UNDEFINED, 256 CHAN_MODE_SHARED, 257 CHAN_MODE_EXCLUSIVE, 258 }; 259 260 struct cfg80211_beacon_registration { 261 struct list_head list; 262 u32 nlportid; 263 }; 264 265 /* free object */ 266 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 267 268 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 269 char *newname); 270 271 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 272 273 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 274 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 275 unsigned long age_secs); 276 277 /* IBSS */ 278 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 279 struct net_device *dev, 280 struct cfg80211_ibss_params *params, 281 struct cfg80211_cached_keys *connkeys); 282 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 283 struct net_device *dev, 284 struct cfg80211_ibss_params *params, 285 struct cfg80211_cached_keys *connkeys); 286 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 287 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 288 struct net_device *dev, bool nowext); 289 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 290 struct net_device *dev, bool nowext); 291 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 292 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 293 struct wireless_dev *wdev); 294 295 /* mesh */ 296 extern const struct mesh_config default_mesh_config; 297 extern const struct mesh_setup default_mesh_setup; 298 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 299 struct net_device *dev, 300 struct mesh_setup *setup, 301 const struct mesh_config *conf); 302 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 303 struct net_device *dev, 304 struct mesh_setup *setup, 305 const struct mesh_config *conf); 306 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 307 struct net_device *dev); 308 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 309 struct wireless_dev *wdev, 310 struct cfg80211_chan_def *chandef); 311 312 /* AP */ 313 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 314 struct net_device *dev); 315 316 /* MLME */ 317 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 318 struct net_device *dev, 319 struct ieee80211_channel *chan, 320 enum nl80211_auth_type auth_type, 321 const u8 *bssid, 322 const u8 *ssid, int ssid_len, 323 const u8 *ie, int ie_len, 324 const u8 *key, int key_len, int key_idx, 325 const u8 *sae_data, int sae_data_len); 326 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 327 struct net_device *dev, struct ieee80211_channel *chan, 328 enum nl80211_auth_type auth_type, const u8 *bssid, 329 const u8 *ssid, int ssid_len, 330 const u8 *ie, int ie_len, 331 const u8 *key, int key_len, int key_idx, 332 const u8 *sae_data, int sae_data_len); 333 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 334 struct net_device *dev, 335 struct ieee80211_channel *chan, 336 const u8 *bssid, 337 const u8 *ssid, int ssid_len, 338 struct cfg80211_assoc_request *req); 339 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 340 struct net_device *dev, 341 struct ieee80211_channel *chan, 342 const u8 *bssid, 343 const u8 *ssid, int ssid_len, 344 struct cfg80211_assoc_request *req); 345 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 346 struct net_device *dev, const u8 *bssid, 347 const u8 *ie, int ie_len, u16 reason, 348 bool local_state_change); 349 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 350 struct net_device *dev, const u8 *bssid, 351 const u8 *ie, int ie_len, u16 reason, 352 bool local_state_change); 353 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 354 struct net_device *dev, const u8 *bssid, 355 const u8 *ie, int ie_len, u16 reason, 356 bool local_state_change); 357 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 358 struct net_device *dev); 359 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 360 const u8 *req_ie, size_t req_ie_len, 361 const u8 *resp_ie, size_t resp_ie_len, 362 u16 status, bool wextev, 363 struct cfg80211_bss *bss); 364 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 365 u16 frame_type, const u8 *match_data, 366 int match_len); 367 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 368 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 369 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 370 struct wireless_dev *wdev, 371 struct ieee80211_channel *chan, bool offchan, 372 unsigned int wait, const u8 *buf, size_t len, 373 bool no_cck, bool dont_wait_for_ack, u64 *cookie); 374 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 375 const struct ieee80211_ht_cap *ht_capa_mask); 376 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 377 const struct ieee80211_vht_cap *vht_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 void cfg80211_leave(struct cfg80211_registered_device *rdev, 507 struct wireless_dev *wdev); 508 509 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 510 struct wireless_dev *wdev); 511 512 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 513 514 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 515 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 516 #else 517 /* 518 * Trick to enable using it as a condition, 519 * and also not give a warning when it's 520 * not used that way. 521 */ 522 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 523 #endif 524 525 #endif /* __NET_WIRELESS_CORE_H */ 526