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 cfg80211_sched_scan_request *sched_scan_req; 66 unsigned long suspend_at; 67 struct work_struct scan_done_wk; 68 struct work_struct sched_scan_results_wk; 69 70 #ifdef CONFIG_NL80211_TESTMODE 71 struct genl_info *testmode_info; 72 #endif 73 74 struct work_struct conn_work; 75 struct work_struct event_work; 76 77 struct delayed_work dfs_update_channels_wk; 78 79 /* netlink port which started critical protocol (0 means not started) */ 80 u32 crit_proto_nlportid; 81 82 /* must be last because of the way we do wiphy_priv(), 83 * and it should at least be aligned to NETDEV_ALIGN */ 84 struct wiphy wiphy __aligned(NETDEV_ALIGN); 85 }; 86 87 static inline 88 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 89 { 90 BUG_ON(!wiphy); 91 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 92 } 93 94 static inline void 95 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 96 { 97 #ifdef CONFIG_PM 98 int i; 99 100 if (!rdev->wiphy.wowlan_config) 101 return; 102 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 103 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 104 kfree(rdev->wiphy.wowlan_config->patterns); 105 if (rdev->wiphy.wowlan_config->tcp && 106 rdev->wiphy.wowlan_config->tcp->sock) 107 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 108 kfree(rdev->wiphy.wowlan_config->tcp); 109 kfree(rdev->wiphy.wowlan_config); 110 #endif 111 } 112 113 extern struct workqueue_struct *cfg80211_wq; 114 extern struct list_head cfg80211_rdev_list; 115 extern int cfg80211_rdev_list_generation; 116 117 struct cfg80211_internal_bss { 118 struct list_head list; 119 struct list_head hidden_list; 120 struct rb_node rbn; 121 unsigned long ts; 122 unsigned long refcount; 123 atomic_t hold; 124 125 /* must be last because of priv member */ 126 struct cfg80211_bss pub; 127 }; 128 129 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 130 { 131 return container_of(pub, struct cfg80211_internal_bss, pub); 132 } 133 134 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 135 { 136 atomic_inc(&bss->hold); 137 } 138 139 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 140 { 141 int r = atomic_dec_return(&bss->hold); 142 WARN_ON(r < 0); 143 } 144 145 146 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 147 int get_wiphy_idx(struct wiphy *wiphy); 148 149 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 150 151 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 152 struct net *net); 153 154 static inline void wdev_lock(struct wireless_dev *wdev) 155 __acquires(wdev) 156 { 157 mutex_lock(&wdev->mtx); 158 __acquire(wdev->mtx); 159 } 160 161 static inline void wdev_unlock(struct wireless_dev *wdev) 162 __releases(wdev) 163 { 164 __release(wdev->mtx); 165 mutex_unlock(&wdev->mtx); 166 } 167 168 #define ASSERT_RDEV_LOCK(rdev) ASSERT_RTNL() 169 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 170 171 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 172 { 173 ASSERT_RTNL(); 174 175 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 176 rdev->num_running_ifaces > 0; 177 } 178 179 enum cfg80211_event_type { 180 EVENT_CONNECT_RESULT, 181 EVENT_ROAMED, 182 EVENT_DISCONNECTED, 183 EVENT_IBSS_JOINED, 184 }; 185 186 struct cfg80211_event { 187 struct list_head list; 188 enum cfg80211_event_type type; 189 190 union { 191 struct { 192 u8 bssid[ETH_ALEN]; 193 const u8 *req_ie; 194 const u8 *resp_ie; 195 size_t req_ie_len; 196 size_t resp_ie_len; 197 u16 status; 198 } cr; 199 struct { 200 const u8 *req_ie; 201 const u8 *resp_ie; 202 size_t req_ie_len; 203 size_t resp_ie_len; 204 struct cfg80211_bss *bss; 205 } rm; 206 struct { 207 const u8 *ie; 208 size_t ie_len; 209 u16 reason; 210 } dc; 211 struct { 212 u8 bssid[ETH_ALEN]; 213 } ij; 214 }; 215 }; 216 217 struct cfg80211_cached_keys { 218 struct key_params params[6]; 219 u8 data[6][WLAN_MAX_KEY_LEN]; 220 int def, defmgmt; 221 }; 222 223 enum cfg80211_chan_mode { 224 CHAN_MODE_UNDEFINED, 225 CHAN_MODE_SHARED, 226 CHAN_MODE_EXCLUSIVE, 227 }; 228 229 struct cfg80211_beacon_registration { 230 struct list_head list; 231 u32 nlportid; 232 }; 233 234 /* free object */ 235 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 236 237 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 238 char *newname); 239 240 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 241 242 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 243 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 244 unsigned long age_secs); 245 246 /* IBSS */ 247 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 248 struct net_device *dev, 249 struct cfg80211_ibss_params *params, 250 struct cfg80211_cached_keys *connkeys); 251 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 252 struct net_device *dev, 253 struct cfg80211_ibss_params *params, 254 struct cfg80211_cached_keys *connkeys); 255 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 256 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 257 struct net_device *dev, bool nowext); 258 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 259 struct net_device *dev, bool nowext); 260 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 261 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 262 struct wireless_dev *wdev); 263 264 /* mesh */ 265 extern const struct mesh_config default_mesh_config; 266 extern const struct mesh_setup default_mesh_setup; 267 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 268 struct net_device *dev, 269 struct mesh_setup *setup, 270 const struct mesh_config *conf); 271 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 272 struct net_device *dev, 273 struct mesh_setup *setup, 274 const struct mesh_config *conf); 275 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 276 struct net_device *dev); 277 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 278 struct wireless_dev *wdev, 279 struct cfg80211_chan_def *chandef); 280 281 /* AP */ 282 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 283 struct net_device *dev); 284 285 /* MLME */ 286 int 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 const u8 *sae_data, int sae_data_len); 295 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 296 struct net_device *dev, 297 struct ieee80211_channel *chan, 298 const u8 *bssid, 299 const u8 *ssid, int ssid_len, 300 struct cfg80211_assoc_request *req); 301 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 302 struct net_device *dev, const u8 *bssid, 303 const u8 *ie, int ie_len, u16 reason, 304 bool local_state_change); 305 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 306 struct net_device *dev, const u8 *bssid, 307 const u8 *ie, int ie_len, u16 reason, 308 bool local_state_change); 309 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 310 struct net_device *dev); 311 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 312 u16 frame_type, const u8 *match_data, 313 int match_len); 314 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 315 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 316 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 317 struct wireless_dev *wdev, 318 struct ieee80211_channel *chan, bool offchan, 319 unsigned int wait, const u8 *buf, size_t len, 320 bool no_cck, bool dont_wait_for_ack, u64 *cookie); 321 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 322 const struct ieee80211_ht_cap *ht_capa_mask); 323 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 324 const struct ieee80211_vht_cap *vht_capa_mask); 325 326 /* SME events */ 327 int cfg80211_connect(struct cfg80211_registered_device *rdev, 328 struct net_device *dev, 329 struct cfg80211_connect_params *connect, 330 struct cfg80211_cached_keys *connkeys, 331 const u8 *prev_bssid); 332 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 333 const u8 *req_ie, size_t req_ie_len, 334 const u8 *resp_ie, size_t resp_ie_len, 335 u16 status, bool wextev, 336 struct cfg80211_bss *bss); 337 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 338 size_t ie_len, u16 reason, bool from_ap); 339 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 340 struct net_device *dev, u16 reason, 341 bool wextev); 342 void __cfg80211_roamed(struct wireless_dev *wdev, 343 struct cfg80211_bss *bss, 344 const u8 *req_ie, size_t req_ie_len, 345 const u8 *resp_ie, size_t resp_ie_len); 346 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 347 struct wireless_dev *wdev); 348 349 /* SME implementation */ 350 void cfg80211_conn_work(struct work_struct *work); 351 void cfg80211_sme_scan_done(struct net_device *dev); 352 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 353 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 354 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 355 void cfg80211_sme_deauth(struct wireless_dev *wdev); 356 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 357 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 358 359 /* internal helpers */ 360 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 361 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 362 struct key_params *params, int key_idx, 363 bool pairwise, const u8 *mac_addr); 364 void __cfg80211_scan_done(struct work_struct *wk); 365 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 366 void __cfg80211_sched_scan_results(struct work_struct *wk); 367 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 368 bool driver_initiated); 369 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 370 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 371 struct net_device *dev, enum nl80211_iftype ntype, 372 u32 *flags, struct vif_params *params); 373 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 374 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 375 376 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 377 struct wireless_dev *wdev, 378 enum nl80211_iftype iftype, 379 struct ieee80211_channel *chan, 380 enum cfg80211_chan_mode chanmode, 381 u8 radar_detect); 382 383 /** 384 * cfg80211_chandef_dfs_required - checks if radar detection is required 385 * @wiphy: the wiphy to validate against 386 * @chandef: the channel definition to check 387 * Return: 1 if radar detection is required, 0 if it is not, < 0 on error 388 */ 389 int cfg80211_chandef_dfs_required(struct wiphy *wiphy, 390 const struct cfg80211_chan_def *c); 391 392 void cfg80211_set_dfs_state(struct wiphy *wiphy, 393 const struct cfg80211_chan_def *chandef, 394 enum nl80211_dfs_state dfs_state); 395 396 void cfg80211_dfs_channels_update_work(struct work_struct *work); 397 398 399 static inline int 400 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, 401 struct wireless_dev *wdev, 402 enum nl80211_iftype iftype) 403 { 404 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL, 405 CHAN_MODE_UNDEFINED, 0); 406 } 407 408 static inline int 409 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, 410 enum nl80211_iftype iftype) 411 { 412 return cfg80211_can_change_interface(rdev, NULL, iftype); 413 } 414 415 static inline int 416 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev, 417 struct wireless_dev *wdev, 418 struct ieee80211_channel *chan, 419 enum cfg80211_chan_mode chanmode) 420 { 421 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, 422 chan, chanmode, 0); 423 } 424 425 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 426 { 427 unsigned long end = jiffies; 428 429 if (end >= start) 430 return jiffies_to_msecs(end - start); 431 432 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); 433 } 434 435 void 436 cfg80211_get_chan_state(struct wireless_dev *wdev, 437 struct ieee80211_channel **chan, 438 enum cfg80211_chan_mode *chanmode); 439 440 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 441 struct cfg80211_chan_def *chandef); 442 443 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 444 const u8 *rates, unsigned int n_rates, 445 u32 *mask); 446 447 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 448 u32 beacon_int); 449 450 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 451 enum nl80211_iftype iftype, int num); 452 453 void cfg80211_leave(struct cfg80211_registered_device *rdev, 454 struct wireless_dev *wdev); 455 456 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 457 struct wireless_dev *wdev); 458 459 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 460 461 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 462 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 463 #else 464 /* 465 * Trick to enable using it as a condition, 466 * and also not give a warning when it's 467 * not used that way. 468 */ 469 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 470 #endif 471 472 #endif /* __NET_WIRELESS_CORE_H */ 473