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/mutex.h> 9#include <linux/list.h> 10#include <linux/netdevice.h> 11#include <linux/kref.h> 12#include <linux/rbtree.h> 13#include <linux/debugfs.h> 14#include <linux/rfkill.h> 15#include <linux/workqueue.h> 16#include <net/genetlink.h> 17#include <net/cfg80211.h> 18#include "reg.h" 19 20struct cfg80211_registered_device { 21 const struct cfg80211_ops *ops; 22 struct list_head list; 23 /* we hold this mutex during any call so that 24 * we cannot do multiple calls at once, and also 25 * to avoid the deregister call to proceed while 26 * any call is in progress */ 27 struct mutex mtx; 28 29 /* rfkill support */ 30 struct rfkill_ops rfkill_ops; 31 struct rfkill *rfkill; 32 struct work_struct rfkill_sync; 33 34 /* ISO / IEC 3166 alpha2 for which this device is receiving 35 * country IEs on, this can help disregard country IEs from APs 36 * on the same alpha2 quickly. The alpha2 may differ from 37 * cfg80211_regdomain's alpha2 when an intersection has occurred. 38 * If the AP is reconfigured this can also be used to tell us if 39 * the country on the country IE changed. */ 40 char country_ie_alpha2[2]; 41 42 /* If a Country IE has been received this tells us the environment 43 * which its telling us its in. This defaults to ENVIRON_ANY */ 44 enum environment_cap env; 45 46 /* wiphy index, internal only */ 47 int wiphy_idx; 48 49 /* associate netdev list */ 50 struct mutex devlist_mtx; 51 /* protected by devlist_mtx or RCU */ 52 struct list_head netdev_list; 53 int devlist_generation; 54 int opencount; /* also protected by devlist_mtx */ 55 wait_queue_head_t dev_wait; 56 57 /* BSSes/scanning */ 58 spinlock_t bss_lock; 59 struct list_head bss_list; 60 struct rb_root bss_tree; 61 u32 bss_generation; 62 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 63 unsigned long suspend_at; 64 struct work_struct scan_done_wk; 65 66#ifdef CONFIG_NL80211_TESTMODE 67 struct genl_info *testmode_info; 68#endif 69 70 struct work_struct conn_work; 71 struct work_struct event_work; 72 73 /* must be last because of the way we do wiphy_priv(), 74 * and it should at least be aligned to NETDEV_ALIGN */ 75 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN))); 76}; 77 78static inline 79struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 80{ 81 BUG_ON(!wiphy); 82 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 83} 84 85/* Note 0 is valid, hence phy0 */ 86static inline 87bool wiphy_idx_valid(int wiphy_idx) 88{ 89 return (wiphy_idx >= 0); 90} 91 92 93extern struct workqueue_struct *cfg80211_wq; 94extern struct mutex cfg80211_mutex; 95extern struct list_head cfg80211_rdev_list; 96extern int cfg80211_rdev_list_generation; 97 98#define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex)) 99 100/* 101 * You can use this to mark a wiphy_idx as not having an associated wiphy. 102 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL 103 */ 104#define WIPHY_IDX_STALE -1 105 106struct cfg80211_internal_bss { 107 struct list_head list; 108 struct rb_node rbn; 109 unsigned long ts; 110 struct kref ref; 111 atomic_t hold; 112 bool beacon_ies_allocated; 113 bool proberesp_ies_allocated; 114 115 /* must be last because of priv member */ 116 struct cfg80211_bss pub; 117}; 118 119static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 120{ 121 return container_of(pub, struct cfg80211_internal_bss, pub); 122} 123 124static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss) 125{ 126 kref_get(&bss->ref); 127} 128 129static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 130{ 131 atomic_inc(&bss->hold); 132} 133 134static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 135{ 136 int r = atomic_dec_return(&bss->hold); 137 WARN_ON(r < 0); 138} 139 140 141struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 142int get_wiphy_idx(struct wiphy *wiphy); 143 144struct cfg80211_registered_device * 145__cfg80211_rdev_from_info(struct genl_info *info); 146 147/* 148 * This function returns a pointer to the driver 149 * that the genl_info item that is passed refers to. 150 * If successful, it returns non-NULL and also locks 151 * the driver's mutex! 152 * 153 * This means that you need to call cfg80211_unlock_rdev() 154 * before being allowed to acquire &cfg80211_mutex! 155 * 156 * This is necessary because we need to lock the global 157 * mutex to get an item off the list safely, and then 158 * we lock the rdev mutex so it doesn't go away under us. 159 * 160 * We don't want to keep cfg80211_mutex locked 161 * for all the time in order to allow requests on 162 * other interfaces to go through at the same time. 163 * 164 * The result of this can be a PTR_ERR and hence must 165 * be checked with IS_ERR() for errors. 166 */ 167extern struct cfg80211_registered_device * 168cfg80211_get_dev_from_info(struct genl_info *info); 169 170/* requires cfg80211_rdev_mutex to be held! */ 171struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 172 173/* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 174extern struct cfg80211_registered_device * 175cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 176 177int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 178 struct net *net); 179 180static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 181{ 182 mutex_lock(&rdev->mtx); 183} 184 185static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 186{ 187 BUG_ON(IS_ERR(rdev) || !rdev); 188 mutex_unlock(&rdev->mtx); 189} 190 191static inline void wdev_lock(struct wireless_dev *wdev) 192 __acquires(wdev) 193{ 194 mutex_lock(&wdev->mtx); 195 __acquire(wdev->mtx); 196} 197 198static inline void wdev_unlock(struct wireless_dev *wdev) 199 __releases(wdev) 200{ 201 __release(wdev->mtx); 202 mutex_unlock(&wdev->mtx); 203} 204 205#define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx)); 206#define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx)); 207 208enum cfg80211_event_type { 209 EVENT_CONNECT_RESULT, 210 EVENT_ROAMED, 211 EVENT_DISCONNECTED, 212 EVENT_IBSS_JOINED, 213}; 214 215struct cfg80211_event { 216 struct list_head list; 217 enum cfg80211_event_type type; 218 219 union { 220 struct { 221 u8 bssid[ETH_ALEN]; 222 const u8 *req_ie; 223 const u8 *resp_ie; 224 size_t req_ie_len; 225 size_t resp_ie_len; 226 u16 status; 227 } cr; 228 struct { 229 u8 bssid[ETH_ALEN]; 230 const u8 *req_ie; 231 const u8 *resp_ie; 232 size_t req_ie_len; 233 size_t resp_ie_len; 234 } rm; 235 struct { 236 const u8 *ie; 237 size_t ie_len; 238 u16 reason; 239 } dc; 240 struct { 241 u8 bssid[ETH_ALEN]; 242 } ij; 243 }; 244}; 245 246struct cfg80211_cached_keys { 247 struct key_params params[6]; 248 u8 data[6][WLAN_MAX_KEY_LEN]; 249 int def, defmgmt; 250}; 251 252 253/* free object */ 254extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 255 256extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 257 char *newname); 258 259void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 260void wiphy_update_regulatory(struct wiphy *wiphy, 261 enum nl80211_reg_initiator setby); 262 263void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 264void cfg80211_bss_age(struct cfg80211_registered_device *dev, 265 unsigned long age_secs); 266 267/* IBSS */ 268int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 269 struct net_device *dev, 270 struct cfg80211_ibss_params *params, 271 struct cfg80211_cached_keys *connkeys); 272int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 273 struct net_device *dev, 274 struct cfg80211_ibss_params *params, 275 struct cfg80211_cached_keys *connkeys); 276void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 277int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 278 struct net_device *dev, bool nowext); 279int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 280 struct net_device *dev, bool nowext); 281void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 282int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 283 struct wireless_dev *wdev); 284 285/* MLME */ 286int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 287 struct net_device *dev, 288 struct ieee80211_channel *chan, 289 enum nl80211_auth_type auth_type, 290 const u8 *bssid, 291 const u8 *ssid, int ssid_len, 292 const u8 *ie, int ie_len, 293 const u8 *key, int key_len, int key_idx, 294 bool local_state_change); 295int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 296 struct net_device *dev, struct ieee80211_channel *chan, 297 enum nl80211_auth_type auth_type, const u8 *bssid, 298 const u8 *ssid, int ssid_len, 299 const u8 *ie, int ie_len, 300 const u8 *key, int key_len, int key_idx, 301 bool local_state_change); 302int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 303 struct net_device *dev, 304 struct ieee80211_channel *chan, 305 const u8 *bssid, const u8 *prev_bssid, 306 const u8 *ssid, int ssid_len, 307 const u8 *ie, int ie_len, bool use_mfp, 308 struct cfg80211_crypto_settings *crypt); 309int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 310 struct net_device *dev, struct ieee80211_channel *chan, 311 const u8 *bssid, const u8 *prev_bssid, 312 const u8 *ssid, int ssid_len, 313 const u8 *ie, int ie_len, bool use_mfp, 314 struct cfg80211_crypto_settings *crypt); 315int __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); 319int cfg80211_mlme_deauth(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); 323int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 324 struct net_device *dev, const u8 *bssid, 325 const u8 *ie, int ie_len, u16 reason, 326 bool local_state_change); 327void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 328 struct net_device *dev); 329void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 330 const u8 *req_ie, size_t req_ie_len, 331 const u8 *resp_ie, size_t resp_ie_len, 332 u16 status, bool wextev, 333 struct cfg80211_bss *bss); 334int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid, 335 const u8 *match_data, int match_len); 336void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid); 337void cfg80211_mlme_purge_actions(struct wireless_dev *wdev); 338int cfg80211_mlme_action(struct cfg80211_registered_device *rdev, 339 struct net_device *dev, 340 struct ieee80211_channel *chan, 341 enum nl80211_channel_type channel_type, 342 bool channel_type_valid, 343 const u8 *buf, size_t len, u64 *cookie); 344 345/* SME */ 346int __cfg80211_connect(struct cfg80211_registered_device *rdev, 347 struct net_device *dev, 348 struct cfg80211_connect_params *connect, 349 struct cfg80211_cached_keys *connkeys, 350 const u8 *prev_bssid); 351int cfg80211_connect(struct cfg80211_registered_device *rdev, 352 struct net_device *dev, 353 struct cfg80211_connect_params *connect, 354 struct cfg80211_cached_keys *connkeys); 355int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 356 struct net_device *dev, u16 reason, 357 bool wextev); 358int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 359 struct net_device *dev, u16 reason, 360 bool wextev); 361void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid, 362 const u8 *req_ie, size_t req_ie_len, 363 const u8 *resp_ie, size_t resp_ie_len); 364int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 365 struct wireless_dev *wdev); 366 367void cfg80211_conn_work(struct work_struct *work); 368void cfg80211_sme_failed_assoc(struct wireless_dev *wdev); 369bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev); 370 371/* internal helpers */ 372int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 373 struct key_params *params, int key_idx, 374 const u8 *mac_addr); 375void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 376 size_t ie_len, u16 reason, bool from_ap); 377void cfg80211_sme_scan_done(struct net_device *dev); 378void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); 379void cfg80211_sme_disassoc(struct net_device *dev, int idx); 380void __cfg80211_scan_done(struct work_struct *wk); 381void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 382void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 383int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 384 struct net_device *dev, enum nl80211_iftype ntype, 385 u32 *flags, struct vif_params *params); 386void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 387 388struct ieee80211_channel * 389rdev_freq_to_chan(struct cfg80211_registered_device *rdev, 390 int freq, enum nl80211_channel_type channel_type); 391int cfg80211_set_freq(struct cfg80211_registered_device *rdev, 392 struct wireless_dev *wdev, int freq, 393 enum nl80211_channel_type channel_type); 394 395u16 cfg80211_calculate_bitrate(struct rate_info *rate); 396 397#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 398#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 399#else 400/* 401 * Trick to enable using it as a condition, 402 * and also not give a warning when it's 403 * not used that way. 404 */ 405#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 406#endif 407 408#endif /* __NET_WIRELESS_CORE_H */ 409