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 struct cfg80211_coalesce *coalesce; 83 84 /* must be last because of the way we do wiphy_priv(), 85 * and it should at least be aligned to NETDEV_ALIGN */ 86 struct wiphy wiphy __aligned(NETDEV_ALIGN); 87 }; 88 89 static inline 90 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 91 { 92 BUG_ON(!wiphy); 93 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 94 } 95 96 static inline void 97 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 98 { 99 #ifdef CONFIG_PM 100 int i; 101 102 if (!rdev->wiphy.wowlan_config) 103 return; 104 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 105 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 106 kfree(rdev->wiphy.wowlan_config->patterns); 107 if (rdev->wiphy.wowlan_config->tcp && 108 rdev->wiphy.wowlan_config->tcp->sock) 109 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 110 kfree(rdev->wiphy.wowlan_config->tcp); 111 kfree(rdev->wiphy.wowlan_config); 112 #endif 113 } 114 115 extern struct workqueue_struct *cfg80211_wq; 116 extern struct list_head cfg80211_rdev_list; 117 extern int cfg80211_rdev_list_generation; 118 119 struct cfg80211_internal_bss { 120 struct list_head list; 121 struct list_head hidden_list; 122 struct rb_node rbn; 123 unsigned long ts; 124 unsigned long refcount; 125 atomic_t hold; 126 127 /* must be last because of priv member */ 128 struct cfg80211_bss pub; 129 }; 130 131 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 132 { 133 return container_of(pub, struct cfg80211_internal_bss, pub); 134 } 135 136 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 137 { 138 atomic_inc(&bss->hold); 139 } 140 141 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 142 { 143 int r = atomic_dec_return(&bss->hold); 144 WARN_ON(r < 0); 145 } 146 147 148 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 149 int get_wiphy_idx(struct wiphy *wiphy); 150 151 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 152 153 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 154 struct net *net); 155 156 static inline void wdev_lock(struct wireless_dev *wdev) 157 __acquires(wdev) 158 { 159 mutex_lock(&wdev->mtx); 160 __acquire(wdev->mtx); 161 } 162 163 static inline void wdev_unlock(struct wireless_dev *wdev) 164 __releases(wdev) 165 { 166 __release(wdev->mtx); 167 mutex_unlock(&wdev->mtx); 168 } 169 170 #define ASSERT_RDEV_LOCK(rdev) ASSERT_RTNL() 171 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 172 173 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 174 { 175 ASSERT_RTNL(); 176 177 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 178 rdev->num_running_ifaces > 0; 179 } 180 181 enum cfg80211_event_type { 182 EVENT_CONNECT_RESULT, 183 EVENT_ROAMED, 184 EVENT_DISCONNECTED, 185 EVENT_IBSS_JOINED, 186 }; 187 188 struct cfg80211_event { 189 struct list_head list; 190 enum cfg80211_event_type type; 191 192 union { 193 struct { 194 u8 bssid[ETH_ALEN]; 195 const u8 *req_ie; 196 const u8 *resp_ie; 197 size_t req_ie_len; 198 size_t resp_ie_len; 199 u16 status; 200 } cr; 201 struct { 202 const u8 *req_ie; 203 const u8 *resp_ie; 204 size_t req_ie_len; 205 size_t resp_ie_len; 206 struct cfg80211_bss *bss; 207 } rm; 208 struct { 209 const u8 *ie; 210 size_t ie_len; 211 u16 reason; 212 } dc; 213 struct { 214 u8 bssid[ETH_ALEN]; 215 } ij; 216 }; 217 }; 218 219 struct cfg80211_cached_keys { 220 struct key_params params[6]; 221 u8 data[6][WLAN_MAX_KEY_LEN]; 222 int def, defmgmt; 223 }; 224 225 enum cfg80211_chan_mode { 226 CHAN_MODE_UNDEFINED, 227 CHAN_MODE_SHARED, 228 CHAN_MODE_EXCLUSIVE, 229 }; 230 231 struct cfg80211_beacon_registration { 232 struct list_head list; 233 u32 nlportid; 234 }; 235 236 /* free object */ 237 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 238 239 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 240 char *newname); 241 242 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 243 244 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 245 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 246 unsigned long age_secs); 247 248 /* IBSS */ 249 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 250 struct net_device *dev, 251 struct cfg80211_ibss_params *params, 252 struct cfg80211_cached_keys *connkeys); 253 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 254 struct net_device *dev, 255 struct cfg80211_ibss_params *params, 256 struct cfg80211_cached_keys *connkeys); 257 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 258 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 259 struct net_device *dev, bool nowext); 260 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 261 struct net_device *dev, bool nowext); 262 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 263 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 264 struct wireless_dev *wdev); 265 266 /* mesh */ 267 extern const struct mesh_config default_mesh_config; 268 extern const struct mesh_setup default_mesh_setup; 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_join_mesh(struct cfg80211_registered_device *rdev, 274 struct net_device *dev, 275 struct mesh_setup *setup, 276 const struct mesh_config *conf); 277 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 278 struct net_device *dev); 279 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 280 struct wireless_dev *wdev, 281 struct cfg80211_chan_def *chandef); 282 283 /* AP */ 284 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 285 struct net_device *dev); 286 287 /* MLME */ 288 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 289 struct net_device *dev, 290 struct ieee80211_channel *chan, 291 enum nl80211_auth_type auth_type, 292 const u8 *bssid, 293 const u8 *ssid, int ssid_len, 294 const u8 *ie, int ie_len, 295 const u8 *key, int key_len, int key_idx, 296 const u8 *sae_data, int sae_data_len); 297 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 298 struct net_device *dev, 299 struct ieee80211_channel *chan, 300 const u8 *bssid, 301 const u8 *ssid, int ssid_len, 302 struct cfg80211_assoc_request *req); 303 int cfg80211_mlme_deauth(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 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 308 struct net_device *dev, const u8 *bssid, 309 const u8 *ie, int ie_len, u16 reason, 310 bool local_state_change); 311 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 312 struct net_device *dev); 313 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 314 u16 frame_type, const u8 *match_data, 315 int match_len); 316 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 317 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 318 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 319 struct wireless_dev *wdev, 320 struct ieee80211_channel *chan, bool offchan, 321 unsigned int wait, const u8 *buf, size_t len, 322 bool no_cck, bool dont_wait_for_ack, u64 *cookie); 323 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 324 const struct ieee80211_ht_cap *ht_capa_mask); 325 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 326 const struct ieee80211_vht_cap *vht_capa_mask); 327 328 /* SME events */ 329 int cfg80211_connect(struct cfg80211_registered_device *rdev, 330 struct net_device *dev, 331 struct cfg80211_connect_params *connect, 332 struct cfg80211_cached_keys *connkeys, 333 const u8 *prev_bssid); 334 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 335 const u8 *req_ie, size_t req_ie_len, 336 const u8 *resp_ie, size_t resp_ie_len, 337 u16 status, bool wextev, 338 struct cfg80211_bss *bss); 339 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 340 size_t ie_len, u16 reason, bool from_ap); 341 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 342 struct net_device *dev, u16 reason, 343 bool wextev); 344 void __cfg80211_roamed(struct wireless_dev *wdev, 345 struct cfg80211_bss *bss, 346 const u8 *req_ie, size_t req_ie_len, 347 const u8 *resp_ie, size_t resp_ie_len); 348 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 349 struct wireless_dev *wdev); 350 351 /* SME implementation */ 352 void cfg80211_conn_work(struct work_struct *work); 353 void cfg80211_sme_scan_done(struct net_device *dev); 354 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 355 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 356 void cfg80211_sme_disassoc(struct wireless_dev *wdev); 357 void cfg80211_sme_deauth(struct wireless_dev *wdev); 358 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 359 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 360 361 /* internal helpers */ 362 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 363 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 364 struct key_params *params, int key_idx, 365 bool pairwise, const u8 *mac_addr); 366 void __cfg80211_scan_done(struct work_struct *wk); 367 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 368 void __cfg80211_sched_scan_results(struct work_struct *wk); 369 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 370 bool driver_initiated); 371 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 372 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 373 struct net_device *dev, enum nl80211_iftype ntype, 374 u32 *flags, struct vif_params *params); 375 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 376 void cfg80211_process_wdev_events(struct wireless_dev *wdev); 377 378 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 379 struct wireless_dev *wdev, 380 enum nl80211_iftype iftype, 381 struct ieee80211_channel *chan, 382 enum cfg80211_chan_mode chanmode, 383 u8 radar_detect); 384 385 /** 386 * cfg80211_chandef_dfs_required - checks if radar detection is required 387 * @wiphy: the wiphy to validate against 388 * @chandef: the channel definition to check 389 * Return: 1 if radar detection is required, 0 if it is not, < 0 on error 390 */ 391 int cfg80211_chandef_dfs_required(struct wiphy *wiphy, 392 const struct cfg80211_chan_def *c); 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); 399 400 401 static inline int 402 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, 403 struct wireless_dev *wdev, 404 enum nl80211_iftype iftype) 405 { 406 return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL, 407 CHAN_MODE_UNDEFINED, 0); 408 } 409 410 static inline int 411 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, 412 enum nl80211_iftype iftype) 413 { 414 if (rfkill_blocked(rdev->rfkill)) 415 return -ERFKILL; 416 417 return cfg80211_can_change_interface(rdev, NULL, iftype); 418 } 419 420 static inline int 421 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev, 422 struct wireless_dev *wdev, 423 struct ieee80211_channel *chan, 424 enum cfg80211_chan_mode chanmode) 425 { 426 return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, 427 chan, chanmode, 0); 428 } 429 430 static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 431 { 432 unsigned long end = jiffies; 433 434 if (end >= start) 435 return jiffies_to_msecs(end - start); 436 437 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); 438 } 439 440 void 441 cfg80211_get_chan_state(struct wireless_dev *wdev, 442 struct ieee80211_channel **chan, 443 enum cfg80211_chan_mode *chanmode); 444 445 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 446 struct cfg80211_chan_def *chandef); 447 448 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 449 const u8 *rates, unsigned int n_rates, 450 u32 *mask); 451 452 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 453 u32 beacon_int); 454 455 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 456 enum nl80211_iftype iftype, int num); 457 458 void cfg80211_leave(struct cfg80211_registered_device *rdev, 459 struct wireless_dev *wdev); 460 461 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 462 struct wireless_dev *wdev); 463 464 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 465 466 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 467 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 468 #else 469 /* 470 * Trick to enable using it as a condition, 471 * and also not give a warning when it's 472 * not used that way. 473 */ 474 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 475 #endif 476 477 #endif /* __NET_WIRELESS_CORE_H */ 478