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 /* protected by RTNL only */ 63 int num_running_ifaces; 64 int num_running_monitor_ifaces; 65 66 /* BSSes/scanning */ 67 spinlock_t bss_lock; 68 struct list_head bss_list; 69 struct rb_root bss_tree; 70 u32 bss_generation; 71 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 72 struct sk_buff *scan_msg; 73 struct cfg80211_sched_scan_request __rcu *sched_scan_req; 74 unsigned long suspend_at; 75 struct work_struct scan_done_wk; 76 struct work_struct sched_scan_results_wk; 77 78 struct genl_info *cur_cmd_info; 79 80 struct work_struct conn_work; 81 struct work_struct event_work; 82 83 struct delayed_work dfs_update_channels_wk; 84 85 /* netlink port which started critical protocol (0 means not started) */ 86 u32 crit_proto_nlportid; 87 88 struct cfg80211_coalesce *coalesce; 89 90 spinlock_t destroy_list_lock; 91 struct list_head destroy_list; 92 struct work_struct destroy_work; 93 94 struct work_struct sched_scan_stop_wk; 95 96 /* must be last because of the way we do wiphy_priv(), 97 * and it should at least be aligned to NETDEV_ALIGN */ 98 struct wiphy wiphy __aligned(NETDEV_ALIGN); 99 }; 100 101 static inline 102 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 103 { 104 BUG_ON(!wiphy); 105 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 106 } 107 108 static inline void 109 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 110 { 111 #ifdef CONFIG_PM 112 int i; 113 114 if (!rdev->wiphy.wowlan_config) 115 return; 116 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 117 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 118 kfree(rdev->wiphy.wowlan_config->patterns); 119 if (rdev->wiphy.wowlan_config->tcp && 120 rdev->wiphy.wowlan_config->tcp->sock) 121 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 122 kfree(rdev->wiphy.wowlan_config->tcp); 123 kfree(rdev->wiphy.wowlan_config->nd_config); 124 kfree(rdev->wiphy.wowlan_config); 125 #endif 126 } 127 128 extern struct workqueue_struct *cfg80211_wq; 129 extern struct list_head cfg80211_rdev_list; 130 extern int cfg80211_rdev_list_generation; 131 132 struct cfg80211_internal_bss { 133 struct list_head list; 134 struct list_head hidden_list; 135 struct rb_node rbn; 136 unsigned long ts; 137 unsigned long refcount; 138 atomic_t hold; 139 140 /* must be last because of priv member */ 141 struct cfg80211_bss pub; 142 }; 143 144 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 145 { 146 return container_of(pub, struct cfg80211_internal_bss, pub); 147 } 148 149 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 150 { 151 atomic_inc(&bss->hold); 152 } 153 154 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 155 { 156 int r = atomic_dec_return(&bss->hold); 157 WARN_ON(r < 0); 158 } 159 160 161 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 162 int get_wiphy_idx(struct wiphy *wiphy); 163 164 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 165 166 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 167 struct net *net); 168 169 static inline void wdev_lock(struct wireless_dev *wdev) 170 __acquires(wdev) 171 { 172 mutex_lock(&wdev->mtx); 173 __acquire(wdev->mtx); 174 } 175 176 static inline void wdev_unlock(struct wireless_dev *wdev) 177 __releases(wdev) 178 { 179 __release(wdev->mtx); 180 mutex_unlock(&wdev->mtx); 181 } 182 183 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 184 185 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 186 { 187 ASSERT_RTNL(); 188 189 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 190 rdev->num_running_ifaces > 0; 191 } 192 193 enum cfg80211_event_type { 194 EVENT_CONNECT_RESULT, 195 EVENT_ROAMED, 196 EVENT_DISCONNECTED, 197 EVENT_IBSS_JOINED, 198 EVENT_STOPPED, 199 }; 200 201 struct cfg80211_event { 202 struct list_head list; 203 enum cfg80211_event_type type; 204 205 union { 206 struct { 207 u8 bssid[ETH_ALEN]; 208 const u8 *req_ie; 209 const u8 *resp_ie; 210 size_t req_ie_len; 211 size_t resp_ie_len; 212 u16 status; 213 } cr; 214 struct { 215 const u8 *req_ie; 216 const u8 *resp_ie; 217 size_t req_ie_len; 218 size_t resp_ie_len; 219 struct cfg80211_bss *bss; 220 } rm; 221 struct { 222 const u8 *ie; 223 size_t ie_len; 224 u16 reason; 225 bool locally_generated; 226 } dc; 227 struct { 228 u8 bssid[ETH_ALEN]; 229 struct ieee80211_channel *channel; 230 } ij; 231 }; 232 }; 233 234 struct cfg80211_cached_keys { 235 struct key_params params[6]; 236 u8 data[6][WLAN_MAX_KEY_LEN]; 237 int def, defmgmt; 238 }; 239 240 enum cfg80211_chan_mode { 241 CHAN_MODE_UNDEFINED, 242 CHAN_MODE_SHARED, 243 CHAN_MODE_EXCLUSIVE, 244 }; 245 246 struct cfg80211_beacon_registration { 247 struct list_head list; 248 u32 nlportid; 249 }; 250 251 struct cfg80211_iface_destroy { 252 struct list_head list; 253 u32 nlportid; 254 }; 255 256 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 257 258 /* free object */ 259 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 260 261 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 262 char *newname); 263 264 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 265 266 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 267 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 268 unsigned long age_secs); 269 270 /* IBSS */ 271 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 272 struct net_device *dev, 273 struct cfg80211_ibss_params *params, 274 struct cfg80211_cached_keys *connkeys); 275 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 276 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 277 struct net_device *dev, bool nowext); 278 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 279 struct net_device *dev, bool nowext); 280 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 281 struct ieee80211_channel *channel); 282 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 283 struct wireless_dev *wdev); 284 285 /* mesh */ 286 extern const struct mesh_config default_mesh_config; 287 extern const struct mesh_setup default_mesh_setup; 288 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 289 struct net_device *dev, 290 struct mesh_setup *setup, 291 const struct mesh_config *conf); 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_leave_mesh(struct cfg80211_registered_device *rdev, 297 struct net_device *dev); 298 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 299 struct net_device *dev); 300 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 301 struct wireless_dev *wdev, 302 struct cfg80211_chan_def *chandef); 303 304 /* OCB */ 305 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 306 struct net_device *dev, 307 struct ocb_setup *setup); 308 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 309 struct net_device *dev, 310 struct ocb_setup *setup); 311 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 312 struct net_device *dev); 313 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 314 struct net_device *dev); 315 316 /* AP */ 317 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 318 struct net_device *dev, bool notify); 319 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 320 struct net_device *dev, bool notify); 321 322 /* MLME */ 323 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 324 struct net_device *dev, 325 struct ieee80211_channel *chan, 326 enum nl80211_auth_type auth_type, 327 const u8 *bssid, 328 const u8 *ssid, int ssid_len, 329 const u8 *ie, int ie_len, 330 const u8 *key, int key_len, int key_idx, 331 const u8 *sae_data, int sae_data_len); 332 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 333 struct net_device *dev, 334 struct ieee80211_channel *chan, 335 const u8 *bssid, 336 const u8 *ssid, int ssid_len, 337 struct cfg80211_assoc_request *req); 338 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 339 struct net_device *dev, const u8 *bssid, 340 const u8 *ie, int ie_len, u16 reason, 341 bool local_state_change); 342 int cfg80211_mlme_disassoc(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 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 347 struct net_device *dev); 348 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 349 u16 frame_type, const u8 *match_data, 350 int match_len); 351 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 352 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 353 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 354 struct wireless_dev *wdev, 355 struct cfg80211_mgmt_tx_params *params, 356 u64 *cookie); 357 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 358 const struct ieee80211_ht_cap *ht_capa_mask); 359 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 360 const struct ieee80211_vht_cap *vht_capa_mask); 361 362 /* SME events */ 363 int cfg80211_connect(struct cfg80211_registered_device *rdev, 364 struct net_device *dev, 365 struct cfg80211_connect_params *connect, 366 struct cfg80211_cached_keys *connkeys, 367 const u8 *prev_bssid); 368 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 369 const u8 *req_ie, size_t req_ie_len, 370 const u8 *resp_ie, size_t resp_ie_len, 371 u16 status, bool wextev, 372 struct cfg80211_bss *bss); 373 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 374 size_t ie_len, u16 reason, bool from_ap); 375 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 376 struct net_device *dev, u16 reason, 377 bool wextev); 378 void __cfg80211_roamed(struct wireless_dev *wdev, 379 struct cfg80211_bss *bss, 380 const u8 *req_ie, size_t req_ie_len, 381 const u8 *resp_ie, size_t resp_ie_len); 382 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 383 struct wireless_dev *wdev); 384 385 /* SME implementation */ 386 void cfg80211_conn_work(struct work_struct *work); 387 void cfg80211_sme_scan_done(struct net_device *dev); 388 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 389 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 390 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 391 void cfg80211_sme_deauth(struct wireless_dev *wdev); 392 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 393 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 394 395 /* internal helpers */ 396 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 397 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 398 struct key_params *params, int key_idx, 399 bool pairwise, const u8 *mac_addr); 400 void __cfg80211_scan_done(struct work_struct *wk); 401 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 402 bool send_message); 403 void __cfg80211_sched_scan_results(struct work_struct *wk); 404 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 405 bool driver_initiated); 406 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 407 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 408 struct net_device *dev, enum nl80211_iftype ntype, 409 u32 *flags, struct vif_params *params); 410 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 411 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 412 413 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 414 struct wireless_dev *wdev, 415 enum nl80211_iftype iftype, 416 struct ieee80211_channel *chan, 417 enum cfg80211_chan_mode chanmode, 418 u8 radar_detect); 419 420 /** 421 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 422 * @wiphy: the wiphy to validate against 423 * @chandef: the channel definition to check 424 * 425 * Checks if chandef is usable and we can/need start CAC on such channel. 426 * 427 * Return: Return true if all channels available and at least 428 * one channel require CAC (NL80211_DFS_USABLE) 429 */ 430 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 431 const struct cfg80211_chan_def *chandef); 432 433 void cfg80211_set_dfs_state(struct wiphy *wiphy, 434 const struct cfg80211_chan_def *chandef, 435 enum nl80211_dfs_state dfs_state); 436 437 void cfg80211_dfs_channels_update_work(struct work_struct *work); 438 439 unsigned int 440 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 441 const struct cfg80211_chan_def *chandef); 442 443 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 444 { 445 unsigned long end = jiffies; 446 447 if (end >= start) 448 return jiffies_to_msecs(end - start); 449 450 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 451 } 452 453 void 454 cfg80211_get_chan_state(struct wireless_dev *wdev, 455 struct ieee80211_channel **chan, 456 enum cfg80211_chan_mode *chanmode, 457 u8 *radar_detect); 458 459 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 460 struct cfg80211_chan_def *chandef); 461 462 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 463 const u8 *rates, unsigned int n_rates, 464 u32 *mask); 465 466 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 467 u32 beacon_int); 468 469 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 470 enum nl80211_iftype iftype, int num); 471 472 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 473 struct wireless_dev *wdev); 474 void cfg80211_leave(struct cfg80211_registered_device *rdev, 475 struct wireless_dev *wdev); 476 477 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 478 struct wireless_dev *wdev); 479 480 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 481 482 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 483 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 484 #else 485 /* 486 * Trick to enable using it as a condition, 487 * and also not give a warning when it's 488 * not used that way. 489 */ 490 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 491 #endif 492 493 #endif /* __NET_WIRELESS_CORE_H */ 494