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 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 75 struct sk_buff *scan_msg; 76 struct cfg80211_sched_scan_request __rcu *sched_scan_req; 77 unsigned long suspend_at; 78 struct work_struct scan_done_wk; 79 struct work_struct sched_scan_results_wk; 80 81 struct genl_info *cur_cmd_info; 82 83 struct work_struct conn_work; 84 struct work_struct event_work; 85 86 struct delayed_work dfs_update_channels_wk; 87 88 /* netlink port which started critical protocol (0 means not started) */ 89 u32 crit_proto_nlportid; 90 91 struct cfg80211_coalesce *coalesce; 92 93 spinlock_t destroy_list_lock; 94 struct list_head destroy_list; 95 struct work_struct destroy_work; 96 97 struct work_struct sched_scan_stop_wk; 98 99 /* must be last because of the way we do wiphy_priv(), 100 * and it should at least be aligned to NETDEV_ALIGN */ 101 struct wiphy wiphy __aligned(NETDEV_ALIGN); 102 }; 103 104 static inline 105 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 106 { 107 BUG_ON(!wiphy); 108 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 109 } 110 111 static inline void 112 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 113 { 114 #ifdef CONFIG_PM 115 int i; 116 117 if (!rdev->wiphy.wowlan_config) 118 return; 119 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 120 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 121 kfree(rdev->wiphy.wowlan_config->patterns); 122 if (rdev->wiphy.wowlan_config->tcp && 123 rdev->wiphy.wowlan_config->tcp->sock) 124 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 125 kfree(rdev->wiphy.wowlan_config->tcp); 126 kfree(rdev->wiphy.wowlan_config->nd_config); 127 kfree(rdev->wiphy.wowlan_config); 128 #endif 129 } 130 131 extern struct workqueue_struct *cfg80211_wq; 132 extern struct list_head cfg80211_rdev_list; 133 extern int cfg80211_rdev_list_generation; 134 135 struct cfg80211_internal_bss { 136 struct list_head list; 137 struct list_head hidden_list; 138 struct rb_node rbn; 139 u64 ts_boottime; 140 unsigned long ts; 141 unsigned long refcount; 142 atomic_t hold; 143 144 /* time at the start of the reception of the first octet of the 145 * timestamp field of the last beacon/probe received for this BSS. 146 * The time is the TSF of the BSS specified by %parent_bssid. 147 */ 148 u64 parent_tsf; 149 150 /* the BSS according to which %parent_tsf is set. This is set to 151 * the BSS that the interface that requested the scan was connected to 152 * when the beacon/probe was received. 153 */ 154 u8 parent_bssid[ETH_ALEN] __aligned(2); 155 156 /* must be last because of priv member */ 157 struct cfg80211_bss pub; 158 }; 159 160 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 161 { 162 return container_of(pub, struct cfg80211_internal_bss, pub); 163 } 164 165 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 166 { 167 atomic_inc(&bss->hold); 168 } 169 170 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 171 { 172 int r = atomic_dec_return(&bss->hold); 173 WARN_ON(r < 0); 174 } 175 176 177 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 178 int get_wiphy_idx(struct wiphy *wiphy); 179 180 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 181 182 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 183 struct net *net); 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_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 200 201 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 202 { 203 ASSERT_RTNL(); 204 205 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 206 rdev->num_running_ifaces > 0; 207 } 208 209 enum cfg80211_event_type { 210 EVENT_CONNECT_RESULT, 211 EVENT_ROAMED, 212 EVENT_DISCONNECTED, 213 EVENT_IBSS_JOINED, 214 EVENT_STOPPED, 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 struct cfg80211_bss *bss; 229 int status; /* -1 = failed; 0..65535 = status code */ 230 } cr; 231 struct { 232 const u8 *req_ie; 233 const u8 *resp_ie; 234 size_t req_ie_len; 235 size_t resp_ie_len; 236 struct cfg80211_bss *bss; 237 } rm; 238 struct { 239 const u8 *ie; 240 size_t ie_len; 241 u16 reason; 242 bool locally_generated; 243 } dc; 244 struct { 245 u8 bssid[ETH_ALEN]; 246 struct ieee80211_channel *channel; 247 } ij; 248 }; 249 }; 250 251 struct cfg80211_cached_keys { 252 struct key_params params[CFG80211_MAX_WEP_KEYS]; 253 u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; 254 int def; 255 }; 256 257 enum cfg80211_chan_mode { 258 CHAN_MODE_UNDEFINED, 259 CHAN_MODE_SHARED, 260 CHAN_MODE_EXCLUSIVE, 261 }; 262 263 struct cfg80211_beacon_registration { 264 struct list_head list; 265 u32 nlportid; 266 }; 267 268 struct cfg80211_iface_destroy { 269 struct list_head list; 270 u32 nlportid; 271 }; 272 273 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 274 275 /* free object */ 276 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 277 278 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 279 char *newname); 280 281 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 282 283 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 284 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 285 unsigned long age_secs); 286 287 /* IBSS */ 288 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 289 struct net_device *dev, 290 struct cfg80211_ibss_params *params, 291 struct cfg80211_cached_keys *connkeys); 292 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 293 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 294 struct net_device *dev, bool nowext); 295 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 296 struct net_device *dev, bool nowext); 297 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 298 struct ieee80211_channel *channel); 299 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 300 struct wireless_dev *wdev); 301 302 /* mesh */ 303 extern const struct mesh_config default_mesh_config; 304 extern const struct mesh_setup default_mesh_setup; 305 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 306 struct net_device *dev, 307 struct mesh_setup *setup, 308 const struct mesh_config *conf); 309 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 310 struct net_device *dev, 311 struct mesh_setup *setup, 312 const struct mesh_config *conf); 313 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 314 struct net_device *dev); 315 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 316 struct net_device *dev); 317 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 318 struct wireless_dev *wdev, 319 struct cfg80211_chan_def *chandef); 320 321 /* OCB */ 322 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 323 struct net_device *dev, 324 struct ocb_setup *setup); 325 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 326 struct net_device *dev, 327 struct ocb_setup *setup); 328 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 329 struct net_device *dev); 330 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 331 struct net_device *dev); 332 333 /* AP */ 334 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 335 struct net_device *dev, bool notify); 336 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 337 struct net_device *dev, bool notify); 338 339 /* MLME */ 340 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 341 struct net_device *dev, 342 struct ieee80211_channel *chan, 343 enum nl80211_auth_type auth_type, 344 const u8 *bssid, 345 const u8 *ssid, int ssid_len, 346 const u8 *ie, int ie_len, 347 const u8 *key, int key_len, int key_idx, 348 const u8 *sae_data, int sae_data_len); 349 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 350 struct net_device *dev, 351 struct ieee80211_channel *chan, 352 const u8 *bssid, 353 const u8 *ssid, int ssid_len, 354 struct cfg80211_assoc_request *req); 355 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 356 struct net_device *dev, const u8 *bssid, 357 const u8 *ie, int ie_len, u16 reason, 358 bool local_state_change); 359 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 360 struct net_device *dev, const u8 *bssid, 361 const u8 *ie, int ie_len, u16 reason, 362 bool local_state_change); 363 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 364 struct net_device *dev); 365 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 366 u16 frame_type, const u8 *match_data, 367 int match_len); 368 void cfg80211_mlme_unreg_wk(struct work_struct *wk); 369 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 370 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 371 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 372 struct wireless_dev *wdev, 373 struct cfg80211_mgmt_tx_params *params, 374 u64 *cookie); 375 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 376 const struct ieee80211_ht_cap *ht_capa_mask); 377 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 378 const struct ieee80211_vht_cap *vht_capa_mask); 379 380 /* SME events */ 381 int cfg80211_connect(struct cfg80211_registered_device *rdev, 382 struct net_device *dev, 383 struct cfg80211_connect_params *connect, 384 struct cfg80211_cached_keys *connkeys, 385 const u8 *prev_bssid); 386 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 387 const u8 *req_ie, size_t req_ie_len, 388 const u8 *resp_ie, size_t resp_ie_len, 389 int status, bool wextev, 390 struct cfg80211_bss *bss); 391 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 392 size_t ie_len, u16 reason, bool from_ap); 393 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 394 struct net_device *dev, u16 reason, 395 bool wextev); 396 void __cfg80211_roamed(struct wireless_dev *wdev, 397 struct cfg80211_bss *bss, 398 const u8 *req_ie, size_t req_ie_len, 399 const u8 *resp_ie, size_t resp_ie_len); 400 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 401 struct wireless_dev *wdev); 402 403 /* SME implementation */ 404 void cfg80211_conn_work(struct work_struct *work); 405 void cfg80211_sme_scan_done(struct net_device *dev); 406 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 407 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 408 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 409 void cfg80211_sme_deauth(struct wireless_dev *wdev); 410 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 411 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 412 413 /* internal helpers */ 414 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 415 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 416 struct key_params *params, int key_idx, 417 bool pairwise, const u8 *mac_addr); 418 void __cfg80211_scan_done(struct work_struct *wk); 419 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 420 bool send_message); 421 void __cfg80211_sched_scan_results(struct work_struct *wk); 422 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 423 bool driver_initiated); 424 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 425 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 426 struct net_device *dev, enum nl80211_iftype ntype, 427 u32 *flags, struct vif_params *params); 428 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 429 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 430 431 /** 432 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 433 * @wiphy: the wiphy to validate against 434 * @chandef: the channel definition to check 435 * 436 * Checks if chandef is usable and we can/need start CAC on such channel. 437 * 438 * Return: Return true if all channels available and at least 439 * one channel require CAC (NL80211_DFS_USABLE) 440 */ 441 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 442 const struct cfg80211_chan_def *chandef); 443 444 void cfg80211_set_dfs_state(struct wiphy *wiphy, 445 const struct cfg80211_chan_def *chandef, 446 enum nl80211_dfs_state dfs_state); 447 448 void cfg80211_dfs_channels_update_work(struct work_struct *work); 449 450 unsigned int 451 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 452 const struct cfg80211_chan_def *chandef); 453 454 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 455 { 456 unsigned long end = jiffies; 457 458 if (end >= start) 459 return jiffies_to_msecs(end - start); 460 461 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 462 } 463 464 void 465 cfg80211_get_chan_state(struct wireless_dev *wdev, 466 struct ieee80211_channel **chan, 467 enum cfg80211_chan_mode *chanmode, 468 u8 *radar_detect); 469 470 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 471 struct cfg80211_chan_def *chandef); 472 473 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 474 const u8 *rates, unsigned int n_rates, 475 u32 *mask); 476 477 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 478 u32 beacon_int); 479 480 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 481 enum nl80211_iftype iftype, int num); 482 483 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 484 struct wireless_dev *wdev); 485 void cfg80211_leave(struct cfg80211_registered_device *rdev, 486 struct wireless_dev *wdev); 487 488 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 489 struct wireless_dev *wdev); 490 491 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, 492 struct wireless_dev *wdev); 493 494 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 495 496 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 497 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 498 #else 499 /* 500 * Trick to enable using it as a condition, 501 * and also not give a warning when it's 502 * not used that way. 503 */ 504 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 505 #endif 506 507 #endif /* __NET_WIRELESS_CORE_H */ 508