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_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 struct ieee80211_channel *channel; 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 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 253 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 254 struct net_device *dev, bool nowext); 255 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 256 struct net_device *dev, bool nowext); 257 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 258 struct ieee80211_channel *channel); 259 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 260 struct wireless_dev *wdev); 261 262 /* mesh */ 263 extern const struct mesh_config default_mesh_config; 264 extern const struct mesh_setup default_mesh_setup; 265 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 266 struct net_device *dev, 267 struct mesh_setup *setup, 268 const struct mesh_config *conf); 269 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 270 struct net_device *dev, 271 struct mesh_setup *setup, 272 const struct mesh_config *conf); 273 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 274 struct net_device *dev); 275 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 276 struct wireless_dev *wdev, 277 struct cfg80211_chan_def *chandef); 278 279 /* AP */ 280 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 281 struct net_device *dev, bool notify); 282 283 /* MLME */ 284 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 285 struct net_device *dev, 286 struct ieee80211_channel *chan, 287 enum nl80211_auth_type auth_type, 288 const u8 *bssid, 289 const u8 *ssid, int ssid_len, 290 const u8 *ie, int ie_len, 291 const u8 *key, int key_len, int key_idx, 292 const u8 *sae_data, int sae_data_len); 293 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 294 struct net_device *dev, 295 struct ieee80211_channel *chan, 296 const u8 *bssid, 297 const u8 *ssid, int ssid_len, 298 struct cfg80211_assoc_request *req); 299 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 300 struct net_device *dev, const u8 *bssid, 301 const u8 *ie, int ie_len, u16 reason, 302 bool local_state_change); 303 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 304 struct net_device *dev, const u8 *bssid, 305 const u8 *ie, int ie_len, u16 reason, 306 bool local_state_change); 307 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 308 struct net_device *dev); 309 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 310 u16 frame_type, const u8 *match_data, 311 int match_len); 312 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 313 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 314 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 315 struct wireless_dev *wdev, 316 struct cfg80211_mgmt_tx_params *params, 317 u64 *cookie); 318 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 319 const struct ieee80211_ht_cap *ht_capa_mask); 320 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 321 const struct ieee80211_vht_cap *vht_capa_mask); 322 323 /* SME events */ 324 int cfg80211_connect(struct cfg80211_registered_device *rdev, 325 struct net_device *dev, 326 struct cfg80211_connect_params *connect, 327 struct cfg80211_cached_keys *connkeys, 328 const u8 *prev_bssid); 329 void __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); 334 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 335 size_t ie_len, u16 reason, bool from_ap); 336 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 337 struct net_device *dev, u16 reason, 338 bool wextev); 339 void __cfg80211_roamed(struct wireless_dev *wdev, 340 struct cfg80211_bss *bss, 341 const u8 *req_ie, size_t req_ie_len, 342 const u8 *resp_ie, size_t resp_ie_len); 343 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 344 struct wireless_dev *wdev); 345 346 /* SME implementation */ 347 void cfg80211_conn_work(struct work_struct *work); 348 void cfg80211_sme_scan_done(struct net_device *dev); 349 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 350 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 351 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 352 void cfg80211_sme_deauth(struct wireless_dev *wdev); 353 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 354 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 355 356 /* internal helpers */ 357 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 358 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 359 struct key_params *params, int key_idx, 360 bool pairwise, const u8 *mac_addr); 361 void __cfg80211_scan_done(struct work_struct *wk); 362 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 363 bool send_message); 364 void __cfg80211_sched_scan_results(struct work_struct *wk); 365 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 366 bool driver_initiated); 367 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 368 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 369 struct net_device *dev, enum nl80211_iftype ntype, 370 u32 *flags, struct vif_params *params); 371 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 372 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 373 374 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 375 struct wireless_dev *wdev, 376 enum nl80211_iftype iftype, 377 struct ieee80211_channel *chan, 378 enum cfg80211_chan_mode chanmode, 379 u8 radar_detect); 380 381 /** 382 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 383 * @wiphy: the wiphy to validate against 384 * @chandef: the channel definition to check 385 * 386 * Checks if chandef is usable and we can/need start CAC on such channel. 387 * 388 * Return: Return true if all channels available and at least 389 * one channel require CAC (NL80211_DFS_USABLE) 390 */ 391 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 392 const struct cfg80211_chan_def *chandef); 393 394 void cfg80211_set_dfs_state(struct wiphy *wiphy, 395 const struct cfg80211_chan_def *chandef, 396 enum nl80211_dfs_state dfs_state); 397 398 void cfg80211_dfs_channels_update_work(struct work_struct *work); 399 400 unsigned int 401 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 402 const struct cfg80211_chan_def *chandef); 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 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); 464 465 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 466 struct wireless_dev *wdev); 467 468 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 469 470 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 471 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 472 #else 473 /* 474 * Trick to enable using it as a condition, 475 * and also not give a warning when it's 476 * not used that way. 477 */ 478 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 479 #endif 480 481 #endif /* __NET_WIRELESS_CORE_H */ 482