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 22struct 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 /* 40 * the driver requests the regulatory core to set this regulatory 41 * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED 42 * devices using the regulatory_set_wiphy_regd() API 43 */ 44 const struct ieee80211_regdomain *requested_regd; 45 46 /* If a Country IE has been received this tells us the environment 47 * which its telling us its in. This defaults to ENVIRON_ANY */ 48 enum environment_cap env; 49 50 /* wiphy index, internal only */ 51 int wiphy_idx; 52 53 /* associated wireless interfaces, protected by rtnl or RCU */ 54 struct list_head wdev_list; 55 int devlist_generation, wdev_id; 56 int opencount; /* also protected by devlist_mtx */ 57 wait_queue_head_t dev_wait; 58 59 struct list_head beacon_registrations; 60 spinlock_t beacon_registrations_lock; 61 62 /* protected by RTNL only */ 63 int num_running_ifaces; 64 int num_running_monitor_ifaces; 65 66 /* BSSes/scanning */ 67 spinlock_t bss_lock; 68 struct list_head bss_list; 69 struct rb_root bss_tree; 70 u32 bss_generation; 71 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 72 struct sk_buff *scan_msg; 73 struct cfg80211_sched_scan_request __rcu *sched_scan_req; 74 unsigned long suspend_at; 75 struct work_struct scan_done_wk; 76 struct work_struct sched_scan_results_wk; 77 78 struct genl_info *cur_cmd_info; 79 80 struct work_struct conn_work; 81 struct work_struct event_work; 82 83 struct delayed_work dfs_update_channels_wk; 84 85 /* netlink port which started critical protocol (0 means not started) */ 86 u32 crit_proto_nlportid; 87 88 struct cfg80211_coalesce *coalesce; 89 90 spinlock_t destroy_list_lock; 91 struct list_head destroy_list; 92 struct work_struct destroy_work; 93 94 struct work_struct sched_scan_stop_wk; 95 96 /* must be last because of the way we do wiphy_priv(), 97 * and it should at least be aligned to NETDEV_ALIGN */ 98 struct wiphy wiphy __aligned(NETDEV_ALIGN); 99}; 100 101static inline 102struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) 103{ 104 BUG_ON(!wiphy); 105 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 106} 107 108static inline void 109cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) 110{ 111#ifdef CONFIG_PM 112 int i; 113 114 if (!rdev->wiphy.wowlan_config) 115 return; 116 for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) 117 kfree(rdev->wiphy.wowlan_config->patterns[i].mask); 118 kfree(rdev->wiphy.wowlan_config->patterns); 119 if (rdev->wiphy.wowlan_config->tcp && 120 rdev->wiphy.wowlan_config->tcp->sock) 121 sock_release(rdev->wiphy.wowlan_config->tcp->sock); 122 kfree(rdev->wiphy.wowlan_config->tcp); 123 kfree(rdev->wiphy.wowlan_config->nd_config); 124 kfree(rdev->wiphy.wowlan_config); 125#endif 126} 127 128extern struct workqueue_struct *cfg80211_wq; 129extern struct list_head cfg80211_rdev_list; 130extern int cfg80211_rdev_list_generation; 131 132struct cfg80211_internal_bss { 133 struct list_head list; 134 struct list_head hidden_list; 135 struct rb_node rbn; 136 unsigned long ts; 137 unsigned long refcount; 138 atomic_t hold; 139 140 /* must be last because of priv member */ 141 struct cfg80211_bss pub; 142}; 143 144static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 145{ 146 return container_of(pub, struct cfg80211_internal_bss, pub); 147} 148 149static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 150{ 151 atomic_inc(&bss->hold); 152} 153 154static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 155{ 156 int r = atomic_dec_return(&bss->hold); 157 WARN_ON(r < 0); 158} 159 160 161struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 162int get_wiphy_idx(struct wiphy *wiphy); 163 164struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 165 166int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 167 struct net *net); 168 169static inline void wdev_lock(struct wireless_dev *wdev) 170 __acquires(wdev) 171{ 172 mutex_lock(&wdev->mtx); 173 __acquire(wdev->mtx); 174} 175 176static inline void wdev_unlock(struct wireless_dev *wdev) 177 __releases(wdev) 178{ 179 __release(wdev->mtx); 180 mutex_unlock(&wdev->mtx); 181} 182 183#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 184 185static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) 186{ 187 ASSERT_RTNL(); 188 189 return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && 190 rdev->num_running_ifaces > 0; 191} 192 193enum cfg80211_event_type { 194 EVENT_CONNECT_RESULT, 195 EVENT_ROAMED, 196 EVENT_DISCONNECTED, 197 EVENT_IBSS_JOINED, 198 EVENT_STOPPED, 199}; 200 201struct cfg80211_event { 202 struct list_head list; 203 enum cfg80211_event_type type; 204 205 union { 206 struct { 207 u8 bssid[ETH_ALEN]; 208 const u8 *req_ie; 209 const u8 *resp_ie; 210 size_t req_ie_len; 211 size_t resp_ie_len; 212 u16 status; 213 } cr; 214 struct { 215 const u8 *req_ie; 216 const u8 *resp_ie; 217 size_t req_ie_len; 218 size_t resp_ie_len; 219 struct cfg80211_bss *bss; 220 } rm; 221 struct { 222 const u8 *ie; 223 size_t ie_len; 224 u16 reason; 225 } dc; 226 struct { 227 u8 bssid[ETH_ALEN]; 228 struct ieee80211_channel *channel; 229 } ij; 230 }; 231}; 232 233struct cfg80211_cached_keys { 234 struct key_params params[6]; 235 u8 data[6][WLAN_MAX_KEY_LEN]; 236 int def, defmgmt; 237}; 238 239enum cfg80211_chan_mode { 240 CHAN_MODE_UNDEFINED, 241 CHAN_MODE_SHARED, 242 CHAN_MODE_EXCLUSIVE, 243}; 244 245struct cfg80211_beacon_registration { 246 struct list_head list; 247 u32 nlportid; 248}; 249 250struct cfg80211_iface_destroy { 251 struct list_head list; 252 u32 nlportid; 253}; 254 255void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); 256 257/* free object */ 258void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 259 260int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 261 char *newname); 262 263void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 264 265void cfg80211_bss_expire(struct cfg80211_registered_device *rdev); 266void cfg80211_bss_age(struct cfg80211_registered_device *rdev, 267 unsigned long age_secs); 268 269/* IBSS */ 270int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 271 struct net_device *dev, 272 struct cfg80211_ibss_params *params, 273 struct cfg80211_cached_keys *connkeys); 274void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 275int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 276 struct net_device *dev, bool nowext); 277int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 278 struct net_device *dev, bool nowext); 279void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, 280 struct ieee80211_channel *channel); 281int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 282 struct wireless_dev *wdev); 283 284/* mesh */ 285extern const struct mesh_config default_mesh_config; 286extern const struct mesh_setup default_mesh_setup; 287int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 288 struct net_device *dev, 289 struct mesh_setup *setup, 290 const struct mesh_config *conf); 291int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, 292 struct net_device *dev, 293 struct mesh_setup *setup, 294 const struct mesh_config *conf); 295int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 296 struct net_device *dev); 297int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, 298 struct net_device *dev); 299int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, 300 struct wireless_dev *wdev, 301 struct cfg80211_chan_def *chandef); 302 303/* OCB */ 304int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 305 struct net_device *dev, 306 struct ocb_setup *setup); 307int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, 308 struct net_device *dev, 309 struct ocb_setup *setup); 310int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 311 struct net_device *dev); 312int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, 313 struct net_device *dev); 314 315/* AP */ 316int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 317 struct net_device *dev, bool notify); 318int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 319 struct net_device *dev, bool notify); 320 321/* MLME */ 322int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 323 struct net_device *dev, 324 struct ieee80211_channel *chan, 325 enum nl80211_auth_type auth_type, 326 const u8 *bssid, 327 const u8 *ssid, int ssid_len, 328 const u8 *ie, int ie_len, 329 const u8 *key, int key_len, int key_idx, 330 const u8 *sae_data, int sae_data_len); 331int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 332 struct net_device *dev, 333 struct ieee80211_channel *chan, 334 const u8 *bssid, 335 const u8 *ssid, int ssid_len, 336 struct cfg80211_assoc_request *req); 337int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 338 struct net_device *dev, const u8 *bssid, 339 const u8 *ie, int ie_len, u16 reason, 340 bool local_state_change); 341int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 342 struct net_device *dev, const u8 *bssid, 343 const u8 *ie, int ie_len, u16 reason, 344 bool local_state_change); 345void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 346 struct net_device *dev); 347int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 348 u16 frame_type, const u8 *match_data, 349 int match_len); 350void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 351void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 352int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 353 struct wireless_dev *wdev, 354 struct cfg80211_mgmt_tx_params *params, 355 u64 *cookie); 356void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, 357 const struct ieee80211_ht_cap *ht_capa_mask); 358void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 359 const struct ieee80211_vht_cap *vht_capa_mask); 360 361/* SME events */ 362int cfg80211_connect(struct cfg80211_registered_device *rdev, 363 struct net_device *dev, 364 struct cfg80211_connect_params *connect, 365 struct cfg80211_cached_keys *connkeys, 366 const u8 *prev_bssid); 367void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 368 const u8 *req_ie, size_t req_ie_len, 369 const u8 *resp_ie, size_t resp_ie_len, 370 u16 status, bool wextev, 371 struct cfg80211_bss *bss); 372void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 373 size_t ie_len, u16 reason, bool from_ap); 374int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 375 struct net_device *dev, u16 reason, 376 bool wextev); 377void __cfg80211_roamed(struct wireless_dev *wdev, 378 struct cfg80211_bss *bss, 379 const u8 *req_ie, size_t req_ie_len, 380 const u8 *resp_ie, size_t resp_ie_len); 381int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 382 struct wireless_dev *wdev); 383 384/* SME implementation */ 385void cfg80211_conn_work(struct work_struct *work); 386void cfg80211_sme_scan_done(struct net_device *dev); 387bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); 388void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); 389void cfg80211_sme_disassoc(struct wireless_dev *wdev); 390void cfg80211_sme_deauth(struct wireless_dev *wdev); 391void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); 392void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); 393 394/* internal helpers */ 395bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); 396int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 397 struct key_params *params, int key_idx, 398 bool pairwise, const u8 *mac_addr); 399void __cfg80211_scan_done(struct work_struct *wk); 400void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, 401 bool send_message); 402void __cfg80211_sched_scan_results(struct work_struct *wk); 403int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, 404 bool driver_initiated); 405void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 406int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 407 struct net_device *dev, enum nl80211_iftype ntype, 408 u32 *flags, struct vif_params *params); 409void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 410void cfg80211_process_wdev_events(struct wireless_dev *wdev); 411 412int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, 413 struct wireless_dev *wdev, 414 enum nl80211_iftype iftype, 415 struct ieee80211_channel *chan, 416 enum cfg80211_chan_mode chanmode, 417 u8 radar_detect); 418 419/** 420 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable 421 * @wiphy: the wiphy to validate against 422 * @chandef: the channel definition to check 423 * 424 * Checks if chandef is usable and we can/need start CAC on such channel. 425 * 426 * Return: Return true if all channels available and at least 427 * one channel require CAC (NL80211_DFS_USABLE) 428 */ 429bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, 430 const struct cfg80211_chan_def *chandef); 431 432void cfg80211_set_dfs_state(struct wiphy *wiphy, 433 const struct cfg80211_chan_def *chandef, 434 enum nl80211_dfs_state dfs_state); 435 436void cfg80211_dfs_channels_update_work(struct work_struct *work); 437 438unsigned int 439cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, 440 const struct cfg80211_chan_def *chandef); 441 442static inline unsigned int elapsed_jiffies_msecs(unsigned long start) 443{ 444 unsigned long end = jiffies; 445 446 if (end >= start) 447 return jiffies_to_msecs(end - start); 448 449 return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); 450} 451 452void 453cfg80211_get_chan_state(struct wireless_dev *wdev, 454 struct ieee80211_channel **chan, 455 enum cfg80211_chan_mode *chanmode, 456 u8 *radar_detect); 457 458int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, 459 struct cfg80211_chan_def *chandef); 460 461int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 462 const u8 *rates, unsigned int n_rates, 463 u32 *mask); 464 465int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 466 u32 beacon_int); 467 468void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, 469 enum nl80211_iftype iftype, int num); 470 471void __cfg80211_leave(struct cfg80211_registered_device *rdev, 472 struct wireless_dev *wdev); 473void cfg80211_leave(struct cfg80211_registered_device *rdev, 474 struct wireless_dev *wdev); 475 476void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, 477 struct wireless_dev *wdev); 478 479#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 480 481#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 482#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 483#else 484/* 485 * Trick to enable using it as a condition, 486 * and also not give a warning when it's 487 * not used that way. 488 */ 489#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 490#endif 491 492#endif /* __NET_WIRELESS_CORE_H */ 493