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/list.h> 9 #include <linux/netdevice.h> 10 #include <linux/rbtree.h> 11 #include <linux/debugfs.h> 12 #include <linux/rfkill.h> 13 #include <linux/workqueue.h> 14 #include <linux/rtnetlink.h> 15 #include <net/genetlink.h> 16 #include <net/cfg80211.h> 17 #include "reg.h" 18 19 20 #define WIPHY_IDX_INVALID -1 21 22 struct cfg80211_registered_device { 23 const struct cfg80211_ops *ops; 24 struct list_head list; 25 26 /* rfkill support */ 27 struct rfkill_ops rfkill_ops; 28 struct rfkill *rfkill; 29 struct work_struct rfkill_sync; 30 31 /* ISO / IEC 3166 alpha2 for which this device is receiving 32 * country IEs on, this can help disregard country IEs from APs 33 * on the same alpha2 quickly. The alpha2 may differ from 34 * cfg80211_regdomain's alpha2 when an intersection has occurred. 35 * If the AP is reconfigured this can also be used to tell us if 36 * the country on the country IE changed. */ 37 char country_ie_alpha2[2]; 38 39 /* 40 * the driver requests the regulatory core to set this regulatory 41 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED 42 * devices using the regulatory_set_wiphy_regd() API 43 */ 44 const struct ieee80211_regdomain *requested_regd; 45 46 /* If a Country IE has been received this tells us the environment 47 * which its telling us its in. This defaults to ENVIRON_ANY */ 48 enum environment_cap env; 49 50 /* wiphy index, internal only */ 51 int wiphy_idx; 52 53 /* associated wireless interfaces, protected by rtnl or RCU */ 54 struct list_head wdev_list; 55 int devlist_generation, wdev_id; 56 int opencount; /* also protected by devlist_mtx */ 57 wait_queue_head_t dev_wait; 58 59 struct list_head beacon_registrations; 60 spinlock_t beacon_registrations_lock; 61 62 struct list_head mlme_unreg; 63 spinlock_t mlme_unreg_lock; 64 struct work_struct mlme_unreg_wk; 65 66 /* protected by RTNL only */ 67 int num_running_ifaces; 68 int num_running_monitor_ifaces; 69 70 /* BSSes/scanning */ 71 spinlock_t bss_lock; 72 struct list_head bss_list; 73 struct rb_root bss_tree; 74 u32 bss_generation; 75 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 76 struct sk_buff *scan_msg; 77 struct cfg80211_sched_scan_request __rcu *sched_scan_req; 78 unsigned long suspend_at; 79 struct work_struct scan_done_wk; 80 struct work_struct sched_scan_results_wk; 81 82 struct genl_info *cur_cmd_info; 83 84 struct work_struct conn_work; 85 struct work_struct event_work; 86 87 struct delayed_work dfs_update_channels_wk; 88 89 /* netlink port which started critical protocol (0 means not started) */ 90 u32 crit_proto_nlportid; 91 92 struct cfg80211_coalesce *coalesce; 93 94 spinlock_t destroy_list_lock; 95 struct list_head destroy_list; 96 struct work_struct destroy_work; 97 98 struct work_struct sched_scan_stop_wk; 99 100 /* must be last because of the way we do wiphy_priv(), 101 * and it should at least be aligned to NETDEV_ALIGN */ 102 struct wiphy wiphy __aligned(NETDEV_ALIGN); 103 }; 104 105 static inline 106 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 107 { 108 BUG_ON(!wiphy); 109 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 110 } 111 112 static inline void 113 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 114 { 115 #ifdef CONFIG_PM 116 int i; 117 118 if (!rdev->wiphy.wowlan_config) 119 return; 120 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 121 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 122 kfree(rdev->wiphy.wowlan_config->patterns); 123 if (rdev->wiphy.wowlan_config->tcp && 124 rdev->wiphy.wowlan_config->tcp->sock) 125 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 126 kfree(rdev->wiphy.wowlan_config->tcp); 127 kfree(rdev->wiphy.wowlan_config->nd_config); 128 kfree(rdev->wiphy.wowlan_config); 129 #endif 130 } 131 132 extern struct workqueue_struct *cfg80211_wq; 133 extern struct list_head cfg80211_rdev_list; 134 extern int cfg80211_rdev_list_generation; 135 136 struct cfg80211_internal_bss { 137 struct list_head list; 138 struct list_head hidden_list; 139 struct rb_node rbn; 140 u64 ts_boottime; 141 unsigned long ts; 142 unsigned long refcount; 143 atomic_t hold; 144 145 /* must be last because of priv member */ 146 struct cfg80211_bss pub; 147 }; 148 149 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 150 { 151 return container_of(pub, struct cfg80211_internal_bss, pub); 152 } 153 154 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 155 { 156 atomic_inc(&bss->hold); 157 } 158 159 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 160 { 161 int r = atomic_dec_return(&bss->hold); 162 WARN_ON(r < 0); 163 } 164 165 166 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 167 int get_wiphy_idx(struct wiphy *wiphy); 168 169 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 170 171 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 172 struct net *net); 173 174 static inline void wdev_lock(struct wireless_dev *wdev) 175 __acquires(wdev) 176 { 177 mutex_lock(&wdev->mtx); 178 __acquire(wdev->mtx); 179 } 180 181 static inline void wdev_unlock(struct wireless_dev *wdev) 182 __releases(wdev) 183 { 184 __release(wdev->mtx); 185 mutex_unlock(&wdev->mtx); 186 } 187 188 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 189 190 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 191 { 192 ASSERT_RTNL(); 193 194 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 195 rdev->num_running_ifaces > 0; 196 } 197 198 enum cfg80211_event_type { 199 EVENT_CONNECT_RESULT, 200 EVENT_ROAMED, 201 EVENT_DISCONNECTED, 202 EVENT_IBSS_JOINED, 203 EVENT_STOPPED, 204 }; 205 206 struct cfg80211_event { 207 struct list_head list; 208 enum cfg80211_event_type type; 209 210 union { 211 struct { 212 u8 bssid[ETH_ALEN]; 213 const u8 *req_ie; 214 const u8 *resp_ie; 215 size_t req_ie_len; 216 size_t resp_ie_len; 217 u16 status; 218 } cr; 219 struct { 220 const u8 *req_ie; 221 const u8 *resp_ie; 222 size_t req_ie_len; 223 size_t resp_ie_len; 224 struct cfg80211_bss *bss; 225 } rm; 226 struct { 227 const u8 *ie; 228 size_t ie_len; 229 u16 reason; 230 bool locally_generated; 231 } dc; 232 struct { 233 u8 bssid[ETH_ALEN]; 234 struct ieee80211_channel *channel; 235 } ij; 236 }; 237 }; 238 239 struct cfg80211_cached_keys { 240 struct key_params params[6]; 241 u8 data[6][WLAN_MAX_KEY_LEN]; 242 int def, defmgmt; 243 }; 244 245 enum cfg80211_chan_mode { 246 CHAN_MODE_UNDEFINED, 247 CHAN_MODE_SHARED, 248 CHAN_MODE_EXCLUSIVE, 249 }; 250 251 struct cfg80211_beacon_registration { 252 struct list_head list; 253 u32 nlportid; 254 }; 255 256 struct cfg80211_iface_destroy { 257 struct list_head list; 258 u32 nlportid; 259 }; 260 261 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 262 263 /* free object */ 264 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 265 266 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 267 char *newname); 268 269 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 270 271 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 272 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 273 unsigned long age_secs); 274 275 /* IBSS */ 276 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 277 struct net_device *dev, 278 struct cfg80211_ibss_params *params, 279 struct cfg80211_cached_keys *connkeys); 280 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 281 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 282 struct net_device *dev, bool nowext); 283 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 284 struct net_device *dev, bool nowext); 285 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 286 struct ieee80211_channel *channel); 287 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 288 struct wireless_dev *wdev); 289 290 /* mesh */ 291 extern const struct mesh_config default_mesh_config; 292 extern const struct mesh_setup default_mesh_setup; 293 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 294 struct net_device *dev, 295 struct mesh_setup *setup, 296 const struct mesh_config *conf); 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_leave_mesh(struct cfg80211_registered_device *rdev, 302 struct net_device *dev); 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 /* OCB */ 310 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 311 struct net_device *dev, 312 struct ocb_setup *setup); 313 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 314 struct net_device *dev, 315 struct ocb_setup *setup); 316 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 317 struct net_device *dev); 318 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 319 struct net_device *dev); 320 321 /* AP */ 322 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 323 struct net_device *dev, bool notify); 324 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 325 struct net_device *dev, bool notify); 326 327 /* MLME */ 328 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 329 struct net_device *dev, 330 struct ieee80211_channel *chan, 331 enum nl80211_auth_type auth_type, 332 const u8 *bssid, 333 const u8 *ssid, int ssid_len, 334 const u8 *ie, int ie_len, 335 const u8 *key, int key_len, int key_idx, 336 const u8 *sae_data, int sae_data_len); 337 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 338 struct net_device *dev, 339 struct ieee80211_channel *chan, 340 const u8 *bssid, 341 const u8 *ssid, int ssid_len, 342 struct cfg80211_assoc_request *req); 343 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 344 struct net_device *dev, const u8 *bssid, 345 const u8 *ie, int ie_len, u16 reason, 346 bool local_state_change); 347 int cfg80211_mlme_disassoc(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 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 352 struct net_device *dev); 353 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 354 u16 frame_type, const u8 *match_data, 355 int match_len); 356 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 357 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 358 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 359 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 360 struct wireless_dev *wdev, 361 struct cfg80211_mgmt_tx_params *params, 362 u64 *cookie); 363 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 364 const struct ieee80211_ht_cap *ht_capa_mask); 365 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 366 const struct ieee80211_vht_cap *vht_capa_mask); 367 368 /* SME events */ 369 int cfg80211_connect(struct cfg80211_registered_device *rdev, 370 struct net_device *dev, 371 struct cfg80211_connect_params *connect, 372 struct cfg80211_cached_keys *connkeys, 373 const u8 *prev_bssid); 374 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 375 const u8 *req_ie, size_t req_ie_len, 376 const u8 *resp_ie, size_t resp_ie_len, 377 u16 status, bool wextev, 378 struct cfg80211_bss *bss); 379 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 380 size_t ie_len, u16 reason, bool from_ap); 381 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 382 struct net_device *dev, u16 reason, 383 bool wextev); 384 void __cfg80211_roamed(struct wireless_dev *wdev, 385 struct cfg80211_bss *bss, 386 const u8 *req_ie, size_t req_ie_len, 387 const u8 *resp_ie, size_t resp_ie_len); 388 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 389 struct wireless_dev *wdev); 390 391 /* SME implementation */ 392 void cfg80211_conn_work(struct work_struct *work); 393 void cfg80211_sme_scan_done(struct net_device *dev); 394 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 395 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 396 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 397 void cfg80211_sme_deauth(struct wireless_dev *wdev); 398 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 399 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 400 401 /* internal helpers */ 402 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 403 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 404 struct key_params *params, int key_idx, 405 bool pairwise, const u8 *mac_addr); 406 void __cfg80211_scan_done(struct work_struct *wk); 407 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 408 bool send_message); 409 void __cfg80211_sched_scan_results(struct work_struct *wk); 410 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 411 bool driver_initiated); 412 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 413 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 414 struct net_device *dev, enum nl80211_iftype ntype, 415 u32 *flags, struct vif_params *params); 416 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 417 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 418 419 /** 420 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 421 * @wiphy: the wiphy to validate against 422 * @chandef: the channel definition to check 423 * 424 * Checks if chandef is usable and we can/need start CAC on such channel. 425 * 426 * Return: Return true if all channels available and at least 427 * one channel require CAC (NL80211_DFS_USABLE) 428 */ 429 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 430 const struct cfg80211_chan_def *chandef); 431 432 void cfg80211_set_dfs_state(struct wiphy *wiphy, 433 const struct cfg80211_chan_def *chandef, 434 enum nl80211_dfs_state dfs_state); 435 436 void cfg80211_dfs_channels_update_work(struct work_struct *work); 437 438 unsigned int 439 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 440 const struct cfg80211_chan_def *chandef); 441 442 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 443 { 444 unsigned long end = jiffies; 445 446 if (end >= start) 447 return jiffies_to_msecs(end - start); 448 449 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 450 } 451 452 void 453 cfg80211_get_chan_state(struct wireless_dev *wdev, 454 struct ieee80211_channel **chan, 455 enum cfg80211_chan_mode *chanmode, 456 u8 *radar_detect); 457 458 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 459 struct cfg80211_chan_def *chandef); 460 461 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 462 const u8 *rates, unsigned int n_rates, 463 u32 *mask); 464 465 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 466 u32 beacon_int); 467 468 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 469 enum nl80211_iftype iftype, int num); 470 471 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 472 struct wireless_dev *wdev); 473 void cfg80211_leave(struct cfg80211_registered_device *rdev, 474 struct wireless_dev *wdev); 475 476 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 477 struct wireless_dev *wdev); 478 479 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 480 481 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 482 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 483 #else 484 /* 485 * Trick to enable using it as a condition, 486 * and also not give a warning when it's 487 * not used that way. 488 */ 489 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 490 #endif 491 492 #endif /* __NET_WIRELESS_CORE_H */ 493