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 enum nl80211_timeout_reason timeout_reason; 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 bool locally_generated; 245 } dc; 246 struct { 247 u8 bssid[ETH_ALEN]; 248 struct ieee80211_channel *channel; 249 } ij; 250 }; 251 }; 252 253 struct cfg80211_cached_keys { 254 struct key_params params[CFG80211_MAX_WEP_KEYS]; 255 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 256 int def; 257 }; 258 259 enum cfg80211_chan_mode { 260 CHAN_MODE_UNDEFINED, 261 CHAN_MODE_SHARED, 262 CHAN_MODE_EXCLUSIVE, 263 }; 264 265 struct cfg80211_beacon_registration { 266 struct list_head list; 267 u32 nlportid; 268 }; 269 270 struct cfg80211_iface_destroy { 271 struct list_head list; 272 u32 nlportid; 273 }; 274 275 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 276 277 /* free object */ 278 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 279 280 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 281 char *newname); 282 283 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 284 285 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 286 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 287 unsigned long age_secs); 288 289 /* IBSS */ 290 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 291 struct net_device *dev, 292 struct cfg80211_ibss_params *params, 293 struct cfg80211_cached_keys *connkeys); 294 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 295 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 296 struct net_device *dev, bool nowext); 297 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 298 struct net_device *dev, bool nowext); 299 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 300 struct ieee80211_channel *channel); 301 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 302 struct wireless_dev *wdev); 303 304 /* mesh */ 305 extern const struct mesh_config default_mesh_config; 306 extern const struct mesh_setup default_mesh_setup; 307 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 308 struct net_device *dev, 309 struct mesh_setup *setup, 310 const struct mesh_config *conf); 311 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 312 struct net_device *dev, 313 struct mesh_setup *setup, 314 const struct mesh_config *conf); 315 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 316 struct net_device *dev); 317 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 318 struct net_device *dev); 319 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 320 struct wireless_dev *wdev, 321 struct cfg80211_chan_def *chandef); 322 323 /* OCB */ 324 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 325 struct net_device *dev, 326 struct ocb_setup *setup); 327 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 328 struct net_device *dev, 329 struct ocb_setup *setup); 330 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 331 struct net_device *dev); 332 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 333 struct net_device *dev); 334 335 /* AP */ 336 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 337 struct net_device *dev, bool notify); 338 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 339 struct net_device *dev, bool notify); 340 341 /* MLME */ 342 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 343 struct net_device *dev, 344 struct ieee80211_channel *chan, 345 enum nl80211_auth_type auth_type, 346 const u8 *bssid, 347 const u8 *ssid, int ssid_len, 348 const u8 *ie, int ie_len, 349 const u8 *key, int key_len, int key_idx, 350 const u8 *auth_data, int auth_data_len); 351 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 352 struct net_device *dev, 353 struct ieee80211_channel *chan, 354 const u8 *bssid, 355 const u8 *ssid, int ssid_len, 356 struct cfg80211_assoc_request *req); 357 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 358 struct net_device *dev, const u8 *bssid, 359 const u8 *ie, int ie_len, u16 reason, 360 bool local_state_change); 361 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 362 struct net_device *dev, const u8 *bssid, 363 const u8 *ie, int ie_len, u16 reason, 364 bool local_state_change); 365 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 366 struct net_device *dev); 367 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 368 u16 frame_type, const u8 *match_data, 369 int match_len); 370 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 371 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 372 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 373 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 374 struct wireless_dev *wdev, 375 struct cfg80211_mgmt_tx_params *params, 376 u64 *cookie); 377 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 378 const struct ieee80211_ht_cap *ht_capa_mask); 379 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 380 const struct ieee80211_vht_cap *vht_capa_mask); 381 382 /* SME events */ 383 int cfg80211_connect(struct cfg80211_registered_device *rdev, 384 struct net_device *dev, 385 struct cfg80211_connect_params *connect, 386 struct cfg80211_cached_keys *connkeys, 387 const u8 *prev_bssid); 388 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 389 const u8 *req_ie, size_t req_ie_len, 390 const u8 *resp_ie, size_t resp_ie_len, 391 int status, bool wextev, 392 struct cfg80211_bss *bss, 393 enum nl80211_timeout_reason timeout_reason); 394 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 395 size_t ie_len, u16 reason, bool from_ap); 396 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 397 struct net_device *dev, u16 reason, 398 bool wextev); 399 void __cfg80211_roamed(struct wireless_dev *wdev, 400 struct cfg80211_bss *bss, 401 const u8 *req_ie, size_t req_ie_len, 402 const u8 *resp_ie, size_t resp_ie_len); 403 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 404 struct wireless_dev *wdev); 405 void cfg80211_autodisconnect_wk(struct work_struct *work); 406 407 /* SME implementation */ 408 void cfg80211_conn_work(struct work_struct *work); 409 void cfg80211_sme_scan_done(struct net_device *dev); 410 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 411 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 412 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 413 void cfg80211_sme_deauth(struct wireless_dev *wdev); 414 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 415 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 416 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); 417 418 /* internal helpers */ 419 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 420 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 421 struct key_params *params, int key_idx, 422 bool pairwise, const u8 *mac_addr); 423 void __cfg80211_scan_done(struct work_struct *wk); 424 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 425 bool send_message); 426 void __cfg80211_sched_scan_results(struct work_struct *wk); 427 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 428 bool driver_initiated); 429 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 430 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 431 struct net_device *dev, enum nl80211_iftype ntype, 432 u32 *flags, struct vif_params *params); 433 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 434 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 435 436 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 437 u32 center_freq_khz, u32 bw_khz); 438 439 /** 440 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 441 * @wiphy: the wiphy to validate against 442 * @chandef: the channel definition to check 443 * 444 * Checks if chandef is usable and we can/need start CAC on such channel. 445 * 446 * Return: Return true if all channels available and at least 447 * one channel require CAC (NL80211_DFS_USABLE) 448 */ 449 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 450 const struct cfg80211_chan_def *chandef); 451 452 void cfg80211_set_dfs_state(struct wiphy *wiphy, 453 const struct cfg80211_chan_def *chandef, 454 enum nl80211_dfs_state dfs_state); 455 456 void cfg80211_dfs_channels_update_work(struct work_struct *work); 457 458 unsigned int 459 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 460 const struct cfg80211_chan_def *chandef); 461 462 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 463 { 464 unsigned long end = jiffies; 465 466 if (end >= start) 467 return jiffies_to_msecs(end - start); 468 469 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 470 } 471 472 void 473 cfg80211_get_chan_state(struct wireless_dev *wdev, 474 struct ieee80211_channel **chan, 475 enum cfg80211_chan_mode *chanmode, 476 u8 *radar_detect); 477 478 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 479 struct cfg80211_chan_def *chandef); 480 481 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 482 const u8 *rates, unsigned int n_rates, 483 u32 *mask); 484 485 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 486 enum nl80211_iftype iftype, u32 beacon_int); 487 488 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 489 enum nl80211_iftype iftype, int num); 490 491 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 492 struct wireless_dev *wdev); 493 void cfg80211_leave(struct cfg80211_registered_device *rdev, 494 struct wireless_dev *wdev); 495 496 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 497 struct wireless_dev *wdev); 498 499 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 500 struct wireless_dev *wdev); 501 502 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 503 504 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 505 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 506 #else 507 /* 508 * Trick to enable using it as a condition, 509 * and also not give a warning when it's 510 * not used that way. 511 */ 512 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 513 #endif 514 515 #endif /* __NET_WIRELESS_CORE_H */ 516