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 /* protected by RTNL */ 54 int devlist_generation, wdev_id; 55 int opencount; 56 wait_queue_head_t dev_wait; 57 58 struct list_head beacon_registrations; 59 spinlock_t beacon_registrations_lock; 60 61 struct list_head mlme_unreg; 62 spinlock_t mlme_unreg_lock; 63 struct work_struct mlme_unreg_wk; 64 65 /* protected by RTNL only */ 66 int num_running_ifaces; 67 int num_running_monitor_ifaces; 68 69 /* BSSes/scanning */ 70 spinlock_t bss_lock; 71 struct list_head bss_list; 72 struct rb_root bss_tree; 73 u32 bss_generation; 74 u32 bss_entries; 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 /* time at the start of the reception of the first octet of the 146 * timestamp field of the last beacon/probe received for this BSS. 147 * The time is the TSF of the BSS specified by %parent_bssid. 148 */ 149 u64 parent_tsf; 150 151 /* the BSS according to which %parent_tsf is set. This is set to 152 * the BSS that the interface that requested the scan was connected to 153 * when the beacon/probe was received. 154 */ 155 u8 parent_bssid[ETH_ALEN] __aligned(2); 156 157 /* must be last because of priv member */ 158 struct cfg80211_bss pub; 159 }; 160 161 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 162 { 163 return container_of(pub, struct cfg80211_internal_bss, pub); 164 } 165 166 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 167 { 168 atomic_inc(&bss->hold); 169 } 170 171 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 172 { 173 int r = atomic_dec_return(&bss->hold); 174 WARN_ON(r < 0); 175 } 176 177 178 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 179 int get_wiphy_idx(struct wiphy *wiphy); 180 181 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 182 183 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 184 struct net *net); 185 186 static inline void wdev_lock(struct wireless_dev *wdev) 187 __acquires(wdev) 188 { 189 mutex_lock(&wdev->mtx); 190 __acquire(wdev->mtx); 191 } 192 193 static inline void wdev_unlock(struct wireless_dev *wdev) 194 __releases(wdev) 195 { 196 __release(wdev->mtx); 197 mutex_unlock(&wdev->mtx); 198 } 199 200 #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 EVENT_STOPPED, 216 }; 217 218 struct cfg80211_event { 219 struct list_head list; 220 enum cfg80211_event_type type; 221 222 union { 223 struct { 224 u8 bssid[ETH_ALEN]; 225 const u8 *req_ie; 226 const u8 *resp_ie; 227 size_t req_ie_len; 228 size_t resp_ie_len; 229 struct cfg80211_bss *bss; 230 int status; /* -1 = failed; 0..65535 = status code */ 231 } cr; 232 struct { 233 const u8 *req_ie; 234 const u8 *resp_ie; 235 size_t req_ie_len; 236 size_t resp_ie_len; 237 struct cfg80211_bss *bss; 238 } rm; 239 struct { 240 const u8 *ie; 241 size_t ie_len; 242 u16 reason; 243 bool locally_generated; 244 } dc; 245 struct { 246 u8 bssid[ETH_ALEN]; 247 struct ieee80211_channel *channel; 248 } ij; 249 }; 250 }; 251 252 struct cfg80211_cached_keys { 253 struct key_params params[CFG80211_MAX_WEP_KEYS]; 254 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 255 int def; 256 }; 257 258 enum cfg80211_chan_mode { 259 CHAN_MODE_UNDEFINED, 260 CHAN_MODE_SHARED, 261 CHAN_MODE_EXCLUSIVE, 262 }; 263 264 struct cfg80211_beacon_registration { 265 struct list_head list; 266 u32 nlportid; 267 }; 268 269 struct cfg80211_iface_destroy { 270 struct list_head list; 271 u32 nlportid; 272 }; 273 274 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 275 276 /* free object */ 277 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 278 279 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 280 char *newname); 281 282 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 283 284 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 285 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 286 unsigned long age_secs); 287 288 /* IBSS */ 289 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 290 struct net_device *dev, 291 struct cfg80211_ibss_params *params, 292 struct cfg80211_cached_keys *connkeys); 293 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 294 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 295 struct net_device *dev, bool nowext); 296 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 297 struct net_device *dev, bool nowext); 298 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 299 struct ieee80211_channel *channel); 300 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 301 struct wireless_dev *wdev); 302 303 /* mesh */ 304 extern const struct mesh_config default_mesh_config; 305 extern const struct mesh_setup default_mesh_setup; 306 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 307 struct net_device *dev, 308 struct mesh_setup *setup, 309 const struct mesh_config *conf); 310 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 311 struct net_device *dev, 312 struct mesh_setup *setup, 313 const struct mesh_config *conf); 314 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 315 struct net_device *dev); 316 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 317 struct net_device *dev); 318 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 319 struct wireless_dev *wdev, 320 struct cfg80211_chan_def *chandef); 321 322 /* OCB */ 323 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 324 struct net_device *dev, 325 struct ocb_setup *setup); 326 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 327 struct net_device *dev, 328 struct ocb_setup *setup); 329 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 330 struct net_device *dev); 331 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 332 struct net_device *dev); 333 334 /* AP */ 335 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 336 struct net_device *dev, bool notify); 337 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 338 struct net_device *dev, bool notify); 339 340 /* MLME */ 341 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 342 struct net_device *dev, 343 struct ieee80211_channel *chan, 344 enum nl80211_auth_type auth_type, 345 const u8 *bssid, 346 const u8 *ssid, int ssid_len, 347 const u8 *ie, int ie_len, 348 const u8 *key, int key_len, int key_idx, 349 const u8 *auth_data, int auth_data_len); 350 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 351 struct net_device *dev, 352 struct ieee80211_channel *chan, 353 const u8 *bssid, 354 const u8 *ssid, int ssid_len, 355 struct cfg80211_assoc_request *req); 356 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 357 struct net_device *dev, const u8 *bssid, 358 const u8 *ie, int ie_len, u16 reason, 359 bool local_state_change); 360 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 361 struct net_device *dev, const u8 *bssid, 362 const u8 *ie, int ie_len, u16 reason, 363 bool local_state_change); 364 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 365 struct net_device *dev); 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_unreg_wk(struct work_struct *wk); 370 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 371 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 372 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 373 struct wireless_dev *wdev, 374 struct cfg80211_mgmt_tx_params *params, 375 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 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 379 const struct ieee80211_vht_cap *vht_capa_mask); 380 381 /* SME events */ 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 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 388 const u8 *req_ie, size_t req_ie_len, 389 const u8 *resp_ie, size_t resp_ie_len, 390 int status, bool wextev, 391 struct cfg80211_bss *bss); 392 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 393 size_t ie_len, u16 reason, bool from_ap); 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 /* SME implementation */ 405 void cfg80211_conn_work(struct work_struct *work); 406 void cfg80211_sme_scan_done(struct net_device *dev); 407 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 408 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 409 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 410 void cfg80211_sme_deauth(struct wireless_dev *wdev); 411 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 412 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 413 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 414 415 /* internal helpers */ 416 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 417 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 418 struct key_params *params, int key_idx, 419 bool pairwise, const u8 *mac_addr); 420 void __cfg80211_scan_done(struct work_struct *wk); 421 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 422 bool send_message); 423 void __cfg80211_sched_scan_results(struct work_struct *wk); 424 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 425 bool driver_initiated); 426 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 427 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 428 struct net_device *dev, enum nl80211_iftype ntype, 429 u32 *flags, struct vif_params *params); 430 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 431 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 432 433 /** 434 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 435 * @wiphy: the wiphy to validate against 436 * @chandef: the channel definition to check 437 * 438 * Checks if chandef is usable and we can/need start CAC on such channel. 439 * 440 * Return: Return true if all channels available and at least 441 * one channel require CAC (NL80211_DFS_USABLE) 442 */ 443 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 444 const struct cfg80211_chan_def *chandef); 445 446 void cfg80211_set_dfs_state(struct wiphy *wiphy, 447 const struct cfg80211_chan_def *chandef, 448 enum nl80211_dfs_state dfs_state); 449 450 void cfg80211_dfs_channels_update_work(struct work_struct *work); 451 452 unsigned int 453 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 454 const struct cfg80211_chan_def *chandef); 455 456 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 457 { 458 unsigned long end = jiffies; 459 460 if (end >= start) 461 return jiffies_to_msecs(end - start); 462 463 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 464 } 465 466 void 467 cfg80211_get_chan_state(struct wireless_dev *wdev, 468 struct ieee80211_channel **chan, 469 enum cfg80211_chan_mode *chanmode, 470 u8 *radar_detect); 471 472 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 473 struct cfg80211_chan_def *chandef); 474 475 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 476 const u8 *rates, unsigned int n_rates, 477 u32 *mask); 478 479 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 480 enum nl80211_iftype iftype, u32 beacon_int); 481 482 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 483 enum nl80211_iftype iftype, int num); 484 485 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 486 struct wireless_dev *wdev); 487 void cfg80211_leave(struct cfg80211_registered_device *rdev, 488 struct wireless_dev *wdev); 489 490 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 491 struct wireless_dev *wdev); 492 493 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 494 struct wireless_dev *wdev); 495 496 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 497 498 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 499 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 500 #else 501 /* 502 * Trick to enable using it as a condition, 503 * and also not give a warning when it's 504 * not used that way. 505 */ 506 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 507 #endif 508 509 #endif /* __NET_WIRELESS_CORE_H */ 510