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 /* must be last because of the way we do wiphy_priv(), 84 * and it should at least be aligned to NETDEV_ALIGN */ 85 struct wiphy wiphy __aligned(NETDEV_ALIGN); 86 }; 87 88 static inline 89 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 90 { 91 BUG_ON(!wiphy); 92 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 93 } 94 95 static inline void 96 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 97 { 98 #ifdef CONFIG_PM 99 int i; 100 101 if (!rdev->wiphy.wowlan_config) 102 return; 103 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 104 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 105 kfree(rdev->wiphy.wowlan_config->patterns); 106 if (rdev->wiphy.wowlan_config->tcp && 107 rdev->wiphy.wowlan_config->tcp->sock) 108 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 109 kfree(rdev->wiphy.wowlan_config->tcp); 110 kfree(rdev->wiphy.wowlan_config); 111 #endif 112 } 113 114 extern struct workqueue_struct *cfg80211_wq; 115 extern struct list_head cfg80211_rdev_list; 116 extern int cfg80211_rdev_list_generation; 117 118 struct cfg80211_internal_bss { 119 struct list_head list; 120 struct list_head hidden_list; 121 struct rb_node rbn; 122 unsigned long ts; 123 unsigned long refcount; 124 atomic_t hold; 125 126 /* must be last because of priv member */ 127 struct cfg80211_bss pub; 128 }; 129 130 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 131 { 132 return container_of(pub, struct cfg80211_internal_bss, pub); 133 } 134 135 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 136 { 137 atomic_inc(&bss->hold); 138 } 139 140 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 141 { 142 int r = atomic_dec_return(&bss->hold); 143 WARN_ON(r < 0); 144 } 145 146 147 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 148 int get_wiphy_idx(struct wiphy *wiphy); 149 150 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 151 152 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 153 struct net *net); 154 155 static inline void wdev_lock(struct wireless_dev *wdev) 156 __acquires(wdev) 157 { 158 mutex_lock(&wdev->mtx); 159 __acquire(wdev->mtx); 160 } 161 162 static inline void wdev_unlock(struct wireless_dev *wdev) 163 __releases(wdev) 164 { 165 __release(wdev->mtx); 166 mutex_unlock(&wdev->mtx); 167 } 168 169 #define ASSERT_RDEV_LOCK(rdev) ASSERT_RTNL() 170 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 171 172 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 173 { 174 ASSERT_RTNL(); 175 176 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 177 rdev->num_running_ifaces > 0; 178 } 179 180 enum cfg80211_event_type { 181 EVENT_CONNECT_RESULT, 182 EVENT_ROAMED, 183 EVENT_DISCONNECTED, 184 EVENT_IBSS_JOINED, 185 }; 186 187 struct cfg80211_event { 188 struct list_head list; 189 enum cfg80211_event_type type; 190 191 union { 192 struct { 193 u8 bssid[ETH_ALEN]; 194 const u8 *req_ie; 195 const u8 *resp_ie; 196 size_t req_ie_len; 197 size_t resp_ie_len; 198 u16 status; 199 } cr; 200 struct { 201 const u8 *req_ie; 202 const u8 *resp_ie; 203 size_t req_ie_len; 204 size_t resp_ie_len; 205 struct cfg80211_bss *bss; 206 } rm; 207 struct { 208 const u8 *ie; 209 size_t ie_len; 210 u16 reason; 211 } dc; 212 struct { 213 u8 bssid[ETH_ALEN]; 214 } ij; 215 }; 216 }; 217 218 struct cfg80211_cached_keys { 219 struct key_params params[6]; 220 u8 data[6][WLAN_MAX_KEY_LEN]; 221 int def, defmgmt; 222 }; 223 224 enum cfg80211_chan_mode { 225 CHAN_MODE_UNDEFINED, 226 CHAN_MODE_SHARED, 227 CHAN_MODE_EXCLUSIVE, 228 }; 229 230 struct cfg80211_beacon_registration { 231 struct list_head list; 232 u32 nlportid; 233 }; 234 235 /* free object */ 236 void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 237 238 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 239 char *newname); 240 241 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 242 243 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 244 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 245 unsigned long age_secs); 246 247 /* IBSS */ 248 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 249 struct net_device *dev, 250 struct cfg80211_ibss_params *params, 251 struct cfg80211_cached_keys *connkeys); 252 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 253 struct net_device *dev, 254 struct cfg80211_ibss_params *params, 255 struct cfg80211_cached_keys *connkeys); 256 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 257 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 258 struct net_device *dev, bool nowext); 259 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 260 struct net_device *dev, bool nowext); 261 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 262 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 263 struct wireless_dev *wdev); 264 265 /* mesh */ 266 extern const struct mesh_config default_mesh_config; 267 extern const struct mesh_setup default_mesh_setup; 268 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 269 struct net_device *dev, 270 struct mesh_setup *setup, 271 const struct mesh_config *conf); 272 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 273 struct net_device *dev, 274 struct mesh_setup *setup, 275 const struct mesh_config *conf); 276 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 277 struct net_device *dev); 278 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 279 struct wireless_dev *wdev, 280 struct cfg80211_chan_def *chandef); 281 282 /* AP */ 283 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 284 struct net_device *dev); 285 286 /* MLME */ 287 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 288 struct net_device *dev, 289 struct ieee80211_channel *chan, 290 enum nl80211_auth_type auth_type, 291 const u8 *bssid, 292 const u8 *ssid, int ssid_len, 293 const u8 *ie, int ie_len, 294 const u8 *key, int key_len, int key_idx, 295 const u8 *sae_data, int sae_data_len); 296 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 297 struct net_device *dev, 298 struct ieee80211_channel *chan, 299 const u8 *bssid, 300 const u8 *ssid, int ssid_len, 301 struct cfg80211_assoc_request *req); 302 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 303 struct net_device *dev, const u8 *bssid, 304 const u8 *ie, int ie_len, u16 reason, 305 bool local_state_change); 306 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 307 struct net_device *dev, const u8 *bssid, 308 const u8 *ie, int ie_len, u16 reason, 309 bool local_state_change); 310 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 311 struct net_device *dev); 312 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 313 u16 frame_type, const u8 *match_data, 314 int match_len); 315 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 316 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 317 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 318 struct wireless_dev *wdev, 319 struct cfg80211_mgmt_tx_params *params, 320 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, 366 bool send_message); 367 void __cfg80211_sched_scan_results(struct work_struct *wk); 368 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 369 bool driver_initiated); 370 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 371 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 372 struct net_device *dev, enum nl80211_iftype ntype, 373 u32 *flags, struct vif_params *params); 374 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 375 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 376 377 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 378 struct wireless_dev *wdev, 379 enum nl80211_iftype iftype, 380 struct ieee80211_channel *chan, 381 enum cfg80211_chan_mode chanmode, 382 u8 radar_detect); 383 384 /** 385 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 386 * @wiphy: the wiphy to validate against 387 * @chandef: the channel definition to check 388 * 389 * Checks if chandef is usable and we can/need start CAC on such channel. 390 * 391 * Return: Return true if all channels available and at least 392 * one channel require CAC (NL80211_DFS_USABLE) 393 */ 394 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 395 const struct cfg80211_chan_def *chandef); 396 397 void cfg80211_set_dfs_state(struct wiphy *wiphy, 398 const struct cfg80211_chan_def *chandef, 399 enum nl80211_dfs_state dfs_state); 400 401 void cfg80211_dfs_channels_update_work(struct work_struct *work); 402 403 404 static inline int 405 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, 406 struct wireless_dev *wdev, 407 enum nl80211_iftype iftype) 408 { 409 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL, 410 CHAN_MODE_UNDEFINED, 0); 411 } 412 413 static inline int 414 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, 415 enum nl80211_iftype iftype) 416 { 417 if (rfkill_blocked(rdev->rfkill)) 418 return -ERFKILL; 419 420 return cfg80211_can_change_interface(rdev, NULL, iftype); 421 } 422 423 static inline int 424 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev, 425 struct wireless_dev *wdev, 426 struct ieee80211_channel *chan, 427 enum cfg80211_chan_mode chanmode) 428 { 429 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, 430 chan, chanmode, 0); 431 } 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 + (MAX_JIFFY_OFFSET - 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); 447 448 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 449 struct cfg80211_chan_def *chandef); 450 451 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 452 const u8 *rates, unsigned int n_rates, 453 u32 *mask); 454 455 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 456 u32 beacon_int); 457 458 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 459 enum nl80211_iftype iftype, int num); 460 461 void cfg80211_leave(struct cfg80211_registered_device *rdev, 462 struct wireless_dev *wdev); 463 464 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 465 struct wireless_dev *wdev); 466 467 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 468 469 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 470 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 471 #else 472 /* 473 * Trick to enable using it as a condition, 474 * and also not give a warning when it's 475 * not used that way. 476 */ 477 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 478 #endif 479 480 #endif /* __NET_WIRELESS_CORE_H */ 481