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 unsigned long ts; 141 unsigned long refcount; 142 atomic_t hold; 143 144 /* must be last because of priv member */ 145 struct cfg80211_bss pub; 146 }; 147 148 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 149 { 150 return container_of(pub, struct cfg80211_internal_bss, pub); 151 } 152 153 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 154 { 155 atomic_inc(&bss->hold); 156 } 157 158 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 159 { 160 int r = atomic_dec_return(&bss->hold); 161 WARN_ON(r < 0); 162 } 163 164 165 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 166 int get_wiphy_idx(struct wiphy *wiphy); 167 168 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 169 170 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 171 struct net *net); 172 173 static inline void wdev_lock(struct wireless_dev *wdev) 174 __acquires(wdev) 175 { 176 mutex_lock(&wdev->mtx); 177 __acquire(wdev->mtx); 178 } 179 180 static inline void wdev_unlock(struct wireless_dev *wdev) 181 __releases(wdev) 182 { 183 __release(wdev->mtx); 184 mutex_unlock(&wdev->mtx); 185 } 186 187 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 188 189 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 190 { 191 ASSERT_RTNL(); 192 193 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 194 rdev->num_running_ifaces > 0; 195 } 196 197 enum cfg80211_event_type { 198 EVENT_CONNECT_RESULT, 199 EVENT_ROAMED, 200 EVENT_DISCONNECTED, 201 EVENT_IBSS_JOINED, 202 EVENT_STOPPED, 203 }; 204 205 struct cfg80211_event { 206 struct list_head list; 207 enum cfg80211_event_type type; 208 209 union { 210 struct { 211 u8 bssid[ETH_ALEN]; 212 const u8 *req_ie; 213 const u8 *resp_ie; 214 size_t req_ie_len; 215 size_t resp_ie_len; 216 u16 status; 217 } cr; 218 struct { 219 const u8 *req_ie; 220 const u8 *resp_ie; 221 size_t req_ie_len; 222 size_t resp_ie_len; 223 struct cfg80211_bss *bss; 224 } rm; 225 struct { 226 const u8 *ie; 227 size_t ie_len; 228 u16 reason; 229 bool locally_generated; 230 } dc; 231 struct { 232 u8 bssid[ETH_ALEN]; 233 struct ieee80211_channel *channel; 234 } ij; 235 }; 236 }; 237 238 struct cfg80211_cached_keys { 239 struct key_params params[6]; 240 u8 data[6][WLAN_MAX_KEY_LEN]; 241 int def, defmgmt; 242 }; 243 244 enum cfg80211_chan_mode { 245 CHAN_MODE_UNDEFINED, 246 CHAN_MODE_SHARED, 247 CHAN_MODE_EXCLUSIVE, 248 }; 249 250 struct cfg80211_beacon_registration { 251 struct list_head list; 252 u32 nlportid; 253 }; 254 255 struct cfg80211_iface_destroy { 256 struct list_head list; 257 u32 nlportid; 258 }; 259 260 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 261 262 /* free object */ 263 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 264 265 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 *rdev); 271 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 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 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 280 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 281 struct net_device *dev, bool nowext); 282 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 283 struct net_device *dev, bool nowext); 284 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 285 struct ieee80211_channel *channel); 286 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 287 struct wireless_dev *wdev); 288 289 /* mesh */ 290 extern const struct mesh_config default_mesh_config; 291 extern const struct mesh_setup default_mesh_setup; 292 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 293 struct net_device *dev, 294 struct mesh_setup *setup, 295 const struct mesh_config *conf); 296 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 297 struct net_device *dev, 298 struct mesh_setup *setup, 299 const struct mesh_config *conf); 300 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 301 struct net_device *dev); 302 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 303 struct net_device *dev); 304 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 305 struct wireless_dev *wdev, 306 struct cfg80211_chan_def *chandef); 307 308 /* OCB */ 309 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 310 struct net_device *dev, 311 struct ocb_setup *setup); 312 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 313 struct net_device *dev, 314 struct ocb_setup *setup); 315 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 316 struct net_device *dev); 317 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 318 struct net_device *dev); 319 320 /* AP */ 321 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 322 struct net_device *dev, bool notify); 323 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 324 struct net_device *dev, bool notify); 325 326 /* MLME */ 327 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 328 struct net_device *dev, 329 struct ieee80211_channel *chan, 330 enum nl80211_auth_type auth_type, 331 const u8 *bssid, 332 const u8 *ssid, int ssid_len, 333 const u8 *ie, int ie_len, 334 const u8 *key, int key_len, int key_idx, 335 const u8 *sae_data, int sae_data_len); 336 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 337 struct net_device *dev, 338 struct ieee80211_channel *chan, 339 const u8 *bssid, 340 const u8 *ssid, int ssid_len, 341 struct cfg80211_assoc_request *req); 342 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 343 struct net_device *dev, const u8 *bssid, 344 const u8 *ie, int ie_len, u16 reason, 345 bool local_state_change); 346 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 347 struct net_device *dev, const u8 *bssid, 348 const u8 *ie, int ie_len, u16 reason, 349 bool local_state_change); 350 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 351 struct net_device *dev); 352 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 353 u16 frame_type, const u8 *match_data, 354 int match_len); 355 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 356 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 357 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 358 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 359 struct wireless_dev *wdev, 360 struct cfg80211_mgmt_tx_params *params, 361 u64 *cookie); 362 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 363 const struct ieee80211_ht_cap *ht_capa_mask); 364 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 365 const struct ieee80211_vht_cap *vht_capa_mask); 366 367 /* SME events */ 368 int cfg80211_connect(struct cfg80211_registered_device *rdev, 369 struct net_device *dev, 370 struct cfg80211_connect_params *connect, 371 struct cfg80211_cached_keys *connkeys, 372 const u8 *prev_bssid); 373 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 374 const u8 *req_ie, size_t req_ie_len, 375 const u8 *resp_ie, size_t resp_ie_len, 376 u16 status, bool wextev, 377 struct cfg80211_bss *bss); 378 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 379 size_t ie_len, u16 reason, bool from_ap); 380 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 381 struct net_device *dev, u16 reason, 382 bool wextev); 383 void __cfg80211_roamed(struct wireless_dev *wdev, 384 struct cfg80211_bss *bss, 385 const u8 *req_ie, size_t req_ie_len, 386 const u8 *resp_ie, size_t resp_ie_len); 387 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 388 struct wireless_dev *wdev); 389 390 /* SME implementation */ 391 void cfg80211_conn_work(struct work_struct *work); 392 void cfg80211_sme_scan_done(struct net_device *dev); 393 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 394 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 395 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 396 void cfg80211_sme_deauth(struct wireless_dev *wdev); 397 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 398 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 399 400 /* internal helpers */ 401 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 402 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 403 struct key_params *params, int key_idx, 404 bool pairwise, const u8 *mac_addr); 405 void __cfg80211_scan_done(struct work_struct *wk); 406 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 407 bool send_message); 408 void __cfg80211_sched_scan_results(struct work_struct *wk); 409 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 410 bool driver_initiated); 411 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 412 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 413 struct net_device *dev, enum nl80211_iftype ntype, 414 u32 *flags, struct vif_params *params); 415 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 416 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 417 418 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 419 struct wireless_dev *wdev, 420 enum nl80211_iftype iftype, 421 struct ieee80211_channel *chan, 422 enum cfg80211_chan_mode chanmode, 423 u8 radar_detect); 424 425 /** 426 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 427 * @wiphy: the wiphy to validate against 428 * @chandef: the channel definition to check 429 * 430 * Checks if chandef is usable and we can/need start CAC on such channel. 431 * 432 * Return: Return true if all channels available and at least 433 * one channel require CAC (NL80211_DFS_USABLE) 434 */ 435 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 436 const struct cfg80211_chan_def *chandef); 437 438 void cfg80211_set_dfs_state(struct wiphy *wiphy, 439 const struct cfg80211_chan_def *chandef, 440 enum nl80211_dfs_state dfs_state); 441 442 void cfg80211_dfs_channels_update_work(struct work_struct *work); 443 444 unsigned int 445 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 446 const struct cfg80211_chan_def *chandef); 447 448 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 449 { 450 unsigned long end = jiffies; 451 452 if (end >= start) 453 return jiffies_to_msecs(end - start); 454 455 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 456 } 457 458 void 459 cfg80211_get_chan_state(struct wireless_dev *wdev, 460 struct ieee80211_channel **chan, 461 enum cfg80211_chan_mode *chanmode, 462 u8 *radar_detect); 463 464 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 465 struct cfg80211_chan_def *chandef); 466 467 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 468 const u8 *rates, unsigned int n_rates, 469 u32 *mask); 470 471 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 472 u32 beacon_int); 473 474 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 475 enum nl80211_iftype iftype, int num); 476 477 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 478 struct wireless_dev *wdev); 479 void cfg80211_leave(struct cfg80211_registered_device *rdev, 480 struct wireless_dev *wdev); 481 482 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 483 struct wireless_dev *wdev); 484 485 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 486 487 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 488 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 489 #else 490 /* 491 * Trick to enable using it as a condition, 492 * and also not give a warning when it's 493 * not used that way. 494 */ 495 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 496 #endif 497 498 #endif /* __NET_WIRELESS_CORE_H */ 499