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 /* If a Country IE has been received this tells us the environment 40 * which its telling us its in. This defaults to ENVIRON_ANY */ 41 enum environment_cap env; 42 43 /* wiphy index, internal only */ 44 int wiphy_idx; 45 46 /* associated wireless interfaces, protected by rtnl or RCU */ 47 struct list_head wdev_list; 48 int devlist_generation, wdev_id; 49 int opencount; /* also protected by devlist_mtx */ 50 wait_queue_head_t dev_wait; 51 52 struct list_head beacon_registrations; 53 spinlock_t beacon_registrations_lock; 54 55 /* protected by RTNL only */ 56 int num_running_ifaces; 57 int num_running_monitor_ifaces; 58 59 /* BSSes/scanning */ 60 spinlock_t bss_lock; 61 struct list_head bss_list; 62 struct rb_root bss_tree; 63 u32 bss_generation; 64 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 65 struct sk_buff *scan_msg; 66 struct cfg80211_sched_scan_request *sched_scan_req; 67 unsigned long suspend_at; 68 struct work_struct scan_done_wk; 69 struct work_struct sched_scan_results_wk; 70 71 struct genl_info *cur_cmd_info; 72 73 struct work_struct conn_work; 74 struct work_struct event_work; 75 76 struct delayed_work dfs_update_channels_wk; 77 78 /* netlink port which started critical protocol (0 means not started) */ 79 u32 crit_proto_nlportid; 80 81 struct cfg80211_coalesce *coalesce; 82 83 spinlock_t destroy_list_lock; 84 struct list_head destroy_list; 85 struct work_struct destroy_work; 86 87 /* must be last because of the way we do wiphy_priv(), 88 * and it should at least be aligned to NETDEV_ALIGN */ 89 struct wiphy wiphy __aligned(NETDEV_ALIGN); 90 }; 91 92 static inline 93 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 94 { 95 BUG_ON(!wiphy); 96 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 97 } 98 99 static inline void 100 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 101 { 102 #ifdef CONFIG_PM 103 int i; 104 105 if (!rdev->wiphy.wowlan_config) 106 return; 107 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 108 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 109 kfree(rdev->wiphy.wowlan_config->patterns); 110 if (rdev->wiphy.wowlan_config->tcp && 111 rdev->wiphy.wowlan_config->tcp->sock) 112 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 113 kfree(rdev->wiphy.wowlan_config->tcp); 114 kfree(rdev->wiphy.wowlan_config); 115 #endif 116 } 117 118 extern struct workqueue_struct *cfg80211_wq; 119 extern struct list_head cfg80211_rdev_list; 120 extern int cfg80211_rdev_list_generation; 121 122 struct cfg80211_internal_bss { 123 struct list_head list; 124 struct list_head hidden_list; 125 struct rb_node rbn; 126 unsigned long ts; 127 unsigned long refcount; 128 atomic_t hold; 129 130 /* must be last because of priv member */ 131 struct cfg80211_bss pub; 132 }; 133 134 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 135 { 136 return container_of(pub, struct cfg80211_internal_bss, pub); 137 } 138 139 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 140 { 141 atomic_inc(&bss->hold); 142 } 143 144 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 145 { 146 int r = atomic_dec_return(&bss->hold); 147 WARN_ON(r < 0); 148 } 149 150 151 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 152 int get_wiphy_idx(struct wiphy *wiphy); 153 154 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 155 156 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 157 struct net *net); 158 159 static inline void wdev_lock(struct wireless_dev *wdev) 160 __acquires(wdev) 161 { 162 mutex_lock(&wdev->mtx); 163 __acquire(wdev->mtx); 164 } 165 166 static inline void wdev_unlock(struct wireless_dev *wdev) 167 __releases(wdev) 168 { 169 __release(wdev->mtx); 170 mutex_unlock(&wdev->mtx); 171 } 172 173 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 174 175 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 176 { 177 ASSERT_RTNL(); 178 179 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 180 rdev->num_running_ifaces > 0; 181 } 182 183 enum cfg80211_event_type { 184 EVENT_CONNECT_RESULT, 185 EVENT_ROAMED, 186 EVENT_DISCONNECTED, 187 EVENT_IBSS_JOINED, 188 EVENT_STOPPED, 189 }; 190 191 struct cfg80211_event { 192 struct list_head list; 193 enum cfg80211_event_type type; 194 195 union { 196 struct { 197 u8 bssid[ETH_ALEN]; 198 const u8 *req_ie; 199 const u8 *resp_ie; 200 size_t req_ie_len; 201 size_t resp_ie_len; 202 u16 status; 203 } cr; 204 struct { 205 const u8 *req_ie; 206 const u8 *resp_ie; 207 size_t req_ie_len; 208 size_t resp_ie_len; 209 struct cfg80211_bss *bss; 210 } rm; 211 struct { 212 const u8 *ie; 213 size_t ie_len; 214 u16 reason; 215 } dc; 216 struct { 217 u8 bssid[ETH_ALEN]; 218 struct ieee80211_channel *channel; 219 } ij; 220 }; 221 }; 222 223 struct cfg80211_cached_keys { 224 struct key_params params[6]; 225 u8 data[6][WLAN_MAX_KEY_LEN]; 226 int def, defmgmt; 227 }; 228 229 enum cfg80211_chan_mode { 230 CHAN_MODE_UNDEFINED, 231 CHAN_MODE_SHARED, 232 CHAN_MODE_EXCLUSIVE, 233 }; 234 235 struct cfg80211_beacon_registration { 236 struct list_head list; 237 u32 nlportid; 238 }; 239 240 struct cfg80211_iface_destroy { 241 struct list_head list; 242 u32 nlportid; 243 }; 244 245 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 246 247 /* free object */ 248 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 249 250 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 251 char *newname); 252 253 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 254 255 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 256 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 257 unsigned long age_secs); 258 259 /* IBSS */ 260 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 261 struct net_device *dev, 262 struct cfg80211_ibss_params *params, 263 struct cfg80211_cached_keys *connkeys); 264 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 265 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 266 struct net_device *dev, bool nowext); 267 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 268 struct net_device *dev, bool nowext); 269 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 270 struct ieee80211_channel *channel); 271 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 272 struct wireless_dev *wdev); 273 274 /* mesh */ 275 extern const struct mesh_config default_mesh_config; 276 extern const struct mesh_setup default_mesh_setup; 277 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 278 struct net_device *dev, 279 struct mesh_setup *setup, 280 const struct mesh_config *conf); 281 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 282 struct net_device *dev, 283 struct mesh_setup *setup, 284 const struct mesh_config *conf); 285 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 286 struct net_device *dev); 287 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 288 struct net_device *dev); 289 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 290 struct wireless_dev *wdev, 291 struct cfg80211_chan_def *chandef); 292 293 /* AP */ 294 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 295 struct net_device *dev, bool notify); 296 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 297 struct net_device *dev, bool notify); 298 299 /* MLME */ 300 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 301 struct net_device *dev, 302 struct ieee80211_channel *chan, 303 enum nl80211_auth_type auth_type, 304 const u8 *bssid, 305 const u8 *ssid, int ssid_len, 306 const u8 *ie, int ie_len, 307 const u8 *key, int key_len, int key_idx, 308 const u8 *sae_data, int sae_data_len); 309 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 310 struct net_device *dev, 311 struct ieee80211_channel *chan, 312 const u8 *bssid, 313 const u8 *ssid, int ssid_len, 314 struct cfg80211_assoc_request *req); 315 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 316 struct net_device *dev, const u8 *bssid, 317 const u8 *ie, int ie_len, u16 reason, 318 bool local_state_change); 319 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 320 struct net_device *dev, const u8 *bssid, 321 const u8 *ie, int ie_len, u16 reason, 322 bool local_state_change); 323 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 324 struct net_device *dev); 325 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 326 u16 frame_type, const u8 *match_data, 327 int match_len); 328 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 329 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 330 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 331 struct wireless_dev *wdev, 332 struct cfg80211_mgmt_tx_params *params, 333 u64 *cookie); 334 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 335 const struct ieee80211_ht_cap *ht_capa_mask); 336 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 337 const struct ieee80211_vht_cap *vht_capa_mask); 338 339 /* SME events */ 340 int cfg80211_connect(struct cfg80211_registered_device *rdev, 341 struct net_device *dev, 342 struct cfg80211_connect_params *connect, 343 struct cfg80211_cached_keys *connkeys, 344 const u8 *prev_bssid); 345 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 346 const u8 *req_ie, size_t req_ie_len, 347 const u8 *resp_ie, size_t resp_ie_len, 348 u16 status, bool wextev, 349 struct cfg80211_bss *bss); 350 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 351 size_t ie_len, u16 reason, bool from_ap); 352 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 353 struct net_device *dev, u16 reason, 354 bool wextev); 355 void __cfg80211_roamed(struct wireless_dev *wdev, 356 struct cfg80211_bss *bss, 357 const u8 *req_ie, size_t req_ie_len, 358 const u8 *resp_ie, size_t resp_ie_len); 359 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 360 struct wireless_dev *wdev); 361 362 /* SME implementation */ 363 void cfg80211_conn_work(struct work_struct *work); 364 void cfg80211_sme_scan_done(struct net_device *dev); 365 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 366 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 367 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 368 void cfg80211_sme_deauth(struct wireless_dev *wdev); 369 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 370 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 371 372 /* internal helpers */ 373 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 374 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 375 struct key_params *params, int key_idx, 376 bool pairwise, const u8 *mac_addr); 377 void __cfg80211_scan_done(struct work_struct *wk); 378 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 379 bool send_message); 380 void __cfg80211_sched_scan_results(struct work_struct *wk); 381 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 382 bool driver_initiated); 383 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 384 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 385 struct net_device *dev, enum nl80211_iftype ntype, 386 u32 *flags, struct vif_params *params); 387 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 388 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 389 390 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 391 struct wireless_dev *wdev, 392 enum nl80211_iftype iftype, 393 struct ieee80211_channel *chan, 394 enum cfg80211_chan_mode chanmode, 395 u8 radar_detect); 396 397 /** 398 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 399 * @wiphy: the wiphy to validate against 400 * @chandef: the channel definition to check 401 * 402 * Checks if chandef is usable and we can/need start CAC on such channel. 403 * 404 * Return: Return true if all channels available and at least 405 * one channel require CAC (NL80211_DFS_USABLE) 406 */ 407 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 408 const struct cfg80211_chan_def *chandef); 409 410 void cfg80211_set_dfs_state(struct wiphy *wiphy, 411 const struct cfg80211_chan_def *chandef, 412 enum nl80211_dfs_state dfs_state); 413 414 void cfg80211_dfs_channels_update_work(struct work_struct *work); 415 416 unsigned int 417 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 418 const struct cfg80211_chan_def *chandef); 419 420 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 421 { 422 unsigned long end = jiffies; 423 424 if (end >= start) 425 return jiffies_to_msecs(end - start); 426 427 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 428 } 429 430 void 431 cfg80211_get_chan_state(struct wireless_dev *wdev, 432 struct ieee80211_channel **chan, 433 enum cfg80211_chan_mode *chanmode, 434 u8 *radar_detect); 435 436 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 437 struct cfg80211_chan_def *chandef); 438 439 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 440 const u8 *rates, unsigned int n_rates, 441 u32 *mask); 442 443 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 444 u32 beacon_int); 445 446 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 447 enum nl80211_iftype iftype, int num); 448 449 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 450 struct wireless_dev *wdev); 451 void cfg80211_leave(struct cfg80211_registered_device *rdev, 452 struct wireless_dev *wdev); 453 454 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 455 struct wireless_dev *wdev); 456 457 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 458 459 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 460 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 461 #else 462 /* 463 * Trick to enable using it as a condition, 464 * and also not give a warning when it's 465 * not used that way. 466 */ 467 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 468 #endif 469 470 #endif /* __NET_WIRELESS_CORE_H */ 471