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->nd_config); 115 kfree(rdev->wiphy.wowlan_config); 116 #endif 117 } 118 119 extern struct workqueue_struct *cfg80211_wq; 120 extern struct list_head cfg80211_rdev_list; 121 extern int cfg80211_rdev_list_generation; 122 123 struct cfg80211_internal_bss { 124 struct list_head list; 125 struct list_head hidden_list; 126 struct rb_node rbn; 127 unsigned long ts; 128 unsigned long refcount; 129 atomic_t hold; 130 131 /* must be last because of priv member */ 132 struct cfg80211_bss pub; 133 }; 134 135 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 136 { 137 return container_of(pub, struct cfg80211_internal_bss, pub); 138 } 139 140 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 141 { 142 atomic_inc(&bss->hold); 143 } 144 145 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 146 { 147 int r = atomic_dec_return(&bss->hold); 148 WARN_ON(r < 0); 149 } 150 151 152 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 153 int get_wiphy_idx(struct wiphy *wiphy); 154 155 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 156 157 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 158 struct net *net); 159 160 static inline void wdev_lock(struct wireless_dev *wdev) 161 __acquires(wdev) 162 { 163 mutex_lock(&wdev->mtx); 164 __acquire(wdev->mtx); 165 } 166 167 static inline void wdev_unlock(struct wireless_dev *wdev) 168 __releases(wdev) 169 { 170 __release(wdev->mtx); 171 mutex_unlock(&wdev->mtx); 172 } 173 174 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 175 176 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 177 { 178 ASSERT_RTNL(); 179 180 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 181 rdev->num_running_ifaces > 0; 182 } 183 184 enum cfg80211_event_type { 185 EVENT_CONNECT_RESULT, 186 EVENT_ROAMED, 187 EVENT_DISCONNECTED, 188 EVENT_IBSS_JOINED, 189 EVENT_STOPPED, 190 }; 191 192 struct cfg80211_event { 193 struct list_head list; 194 enum cfg80211_event_type type; 195 196 union { 197 struct { 198 u8 bssid[ETH_ALEN]; 199 const u8 *req_ie; 200 const u8 *resp_ie; 201 size_t req_ie_len; 202 size_t resp_ie_len; 203 u16 status; 204 } cr; 205 struct { 206 const u8 *req_ie; 207 const u8 *resp_ie; 208 size_t req_ie_len; 209 size_t resp_ie_len; 210 struct cfg80211_bss *bss; 211 } rm; 212 struct { 213 const u8 *ie; 214 size_t ie_len; 215 u16 reason; 216 } dc; 217 struct { 218 u8 bssid[ETH_ALEN]; 219 struct ieee80211_channel *channel; 220 } ij; 221 }; 222 }; 223 224 struct cfg80211_cached_keys { 225 struct key_params params[6]; 226 u8 data[6][WLAN_MAX_KEY_LEN]; 227 int def, defmgmt; 228 }; 229 230 enum cfg80211_chan_mode { 231 CHAN_MODE_UNDEFINED, 232 CHAN_MODE_SHARED, 233 CHAN_MODE_EXCLUSIVE, 234 }; 235 236 struct cfg80211_beacon_registration { 237 struct list_head list; 238 u32 nlportid; 239 }; 240 241 struct cfg80211_iface_destroy { 242 struct list_head list; 243 u32 nlportid; 244 }; 245 246 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 247 248 /* free object */ 249 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 250 251 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 252 char *newname); 253 254 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 255 256 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 257 void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 258 unsigned long age_secs); 259 260 /* IBSS */ 261 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 262 struct net_device *dev, 263 struct cfg80211_ibss_params *params, 264 struct cfg80211_cached_keys *connkeys); 265 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 266 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 267 struct net_device *dev, bool nowext); 268 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 269 struct net_device *dev, bool nowext); 270 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 271 struct ieee80211_channel *channel); 272 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 273 struct wireless_dev *wdev); 274 275 /* mesh */ 276 extern const struct mesh_config default_mesh_config; 277 extern const struct mesh_setup default_mesh_setup; 278 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 279 struct net_device *dev, 280 struct mesh_setup *setup, 281 const struct mesh_config *conf); 282 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 283 struct net_device *dev, 284 struct mesh_setup *setup, 285 const struct mesh_config *conf); 286 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 287 struct net_device *dev); 288 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 289 struct net_device *dev); 290 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 291 struct wireless_dev *wdev, 292 struct cfg80211_chan_def *chandef); 293 294 /* OCB */ 295 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 296 struct net_device *dev, 297 struct ocb_setup *setup); 298 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 299 struct net_device *dev, 300 struct ocb_setup *setup); 301 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 302 struct net_device *dev); 303 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 304 struct net_device *dev); 305 306 /* AP */ 307 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 308 struct net_device *dev, bool notify); 309 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 310 struct net_device *dev, bool notify); 311 312 /* MLME */ 313 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 314 struct net_device *dev, 315 struct ieee80211_channel *chan, 316 enum nl80211_auth_type auth_type, 317 const u8 *bssid, 318 const u8 *ssid, int ssid_len, 319 const u8 *ie, int ie_len, 320 const u8 *key, int key_len, int key_idx, 321 const u8 *sae_data, int sae_data_len); 322 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 323 struct net_device *dev, 324 struct ieee80211_channel *chan, 325 const u8 *bssid, 326 const u8 *ssid, int ssid_len, 327 struct cfg80211_assoc_request *req); 328 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 329 struct net_device *dev, const u8 *bssid, 330 const u8 *ie, int ie_len, u16 reason, 331 bool local_state_change); 332 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 333 struct net_device *dev, const u8 *bssid, 334 const u8 *ie, int ie_len, u16 reason, 335 bool local_state_change); 336 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 337 struct net_device *dev); 338 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 339 u16 frame_type, const u8 *match_data, 340 int match_len); 341 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 342 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 343 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 344 struct wireless_dev *wdev, 345 struct cfg80211_mgmt_tx_params *params, 346 u64 *cookie); 347 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 348 const struct ieee80211_ht_cap *ht_capa_mask); 349 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 350 const struct ieee80211_vht_cap *vht_capa_mask); 351 352 /* SME events */ 353 int cfg80211_connect(struct cfg80211_registered_device *rdev, 354 struct net_device *dev, 355 struct cfg80211_connect_params *connect, 356 struct cfg80211_cached_keys *connkeys, 357 const u8 *prev_bssid); 358 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 359 const u8 *req_ie, size_t req_ie_len, 360 const u8 *resp_ie, size_t resp_ie_len, 361 u16 status, bool wextev, 362 struct cfg80211_bss *bss); 363 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 364 size_t ie_len, u16 reason, bool from_ap); 365 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 366 struct net_device *dev, u16 reason, 367 bool wextev); 368 void __cfg80211_roamed(struct wireless_dev *wdev, 369 struct cfg80211_bss *bss, 370 const u8 *req_ie, size_t req_ie_len, 371 const u8 *resp_ie, size_t resp_ie_len); 372 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 373 struct wireless_dev *wdev); 374 375 /* SME implementation */ 376 void cfg80211_conn_work(struct work_struct *work); 377 void cfg80211_sme_scan_done(struct net_device *dev); 378 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 379 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 380 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 381 void cfg80211_sme_deauth(struct wireless_dev *wdev); 382 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 383 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 384 385 /* internal helpers */ 386 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 387 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 388 struct key_params *params, int key_idx, 389 bool pairwise, const u8 *mac_addr); 390 void __cfg80211_scan_done(struct work_struct *wk); 391 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 392 bool send_message); 393 void __cfg80211_sched_scan_results(struct work_struct *wk); 394 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 395 bool driver_initiated); 396 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 397 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 398 struct net_device *dev, enum nl80211_iftype ntype, 399 u32 *flags, struct vif_params *params); 400 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 401 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 402 403 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 404 struct wireless_dev *wdev, 405 enum nl80211_iftype iftype, 406 struct ieee80211_channel *chan, 407 enum cfg80211_chan_mode chanmode, 408 u8 radar_detect); 409 410 /** 411 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 412 * @wiphy: the wiphy to validate against 413 * @chandef: the channel definition to check 414 * 415 * Checks if chandef is usable and we can/need start CAC on such channel. 416 * 417 * Return: Return true if all channels available and at least 418 * one channel require CAC (NL80211_DFS_USABLE) 419 */ 420 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 421 const struct cfg80211_chan_def *chandef); 422 423 void cfg80211_set_dfs_state(struct wiphy *wiphy, 424 const struct cfg80211_chan_def *chandef, 425 enum nl80211_dfs_state dfs_state); 426 427 void cfg80211_dfs_channels_update_work(struct work_struct *work); 428 429 unsigned int 430 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 431 const struct cfg80211_chan_def *chandef); 432 433 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 434 { 435 unsigned long end = jiffies; 436 437 if (end >= start) 438 return jiffies_to_msecs(end - start); 439 440 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 441 } 442 443 void 444 cfg80211_get_chan_state(struct wireless_dev *wdev, 445 struct ieee80211_channel **chan, 446 enum cfg80211_chan_mode *chanmode, 447 u8 *radar_detect); 448 449 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 450 struct cfg80211_chan_def *chandef); 451 452 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 453 const u8 *rates, unsigned int n_rates, 454 u32 *mask); 455 456 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 457 u32 beacon_int); 458 459 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 460 enum nl80211_iftype iftype, int num); 461 462 void __cfg80211_leave(struct cfg80211_registered_device *rdev, 463 struct wireless_dev *wdev); 464 void cfg80211_leave(struct cfg80211_registered_device *rdev, 465 struct wireless_dev *wdev); 466 467 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 468 struct wireless_dev *wdev); 469 470 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 471 472 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 473 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 474 #else 475 /* 476 * Trick to enable using it as a condition, 477 * and also not give a warning when it's 478 * not used that way. 479 */ 480 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 481 #endif 482 483 #endif /* __NET_WIRELESS_CORE_H */ 484