/* * Wireless configuration interface internals. * * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> */ #ifndef __NET_WIRELESS_CORE_H #define __NET_WIRELESS_CORE_H #include <linux/mutex.h> #include <linux/list.h> #include <linux/netdevice.h> #include <linux/kref.h> #include <linux/rbtree.h> #include <linux/debugfs.h> #include <linux/rfkill.h> #include <linux/workqueue.h> #include <net/genetlink.h> #include <net/cfg80211.h> #include "reg.h" struct cfg80211_registered_device { const struct cfg80211_ops *ops; struct list_head list; /* we hold this mutex during any call so that * we cannot do multiple calls at once, and also * to avoid the deregister call to proceed while * any call is in progress */ struct mutex mtx; /* rfkill support */ struct rfkill_ops rfkill_ops; struct rfkill *rfkill; struct work_struct rfkill_sync; /* ISO / IEC 3166 alpha2 for which this device is receiving * country IEs on, this can help disregard country IEs from APs * on the same alpha2 quickly. The alpha2 may differ from * cfg80211_regdomain's alpha2 when an intersection has occurred. * If the AP is reconfigured this can also be used to tell us if * the country on the country IE changed. */ char country_ie_alpha2[2]; /* If a Country IE has been received this tells us the environment * which its telling us its in. This defaults to ENVIRON_ANY */ enum environment_cap env; /* wiphy index, internal only */ int wiphy_idx; /* associate netdev list */ struct mutex devlist_mtx; /* protected by devlist_mtx or RCU */ struct list_head netdev_list; int devlist_generation; int opencount; /* also protected by devlist_mtx */ wait_queue_head_t dev_wait; u32 ap_beacons_nlpid; /* BSSes/scanning */ spinlock_t bss_lock; struct list_head bss_list; struct rb_root bss_tree; u32 bss_generation; struct cfg80211_scan_request *scan_req; /* protected by RTNL */ struct cfg80211_sched_scan_request *sched_scan_req; unsigned long suspend_at; struct work_struct scan_done_wk; struct work_struct sched_scan_results_wk; struct mutex sched_scan_mtx; #ifdef CONFIG_NL80211_TESTMODE struct genl_info *testmode_info; #endif struct work_struct conn_work; struct work_struct event_work; struct cfg80211_wowlan *wowlan; /* must be last because of the way we do wiphy_priv(), * and it should at least be aligned to NETDEV_ALIGN */ struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN))); }; static inline struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) { BUG_ON(!wiphy); return container_of(wiphy, struct cfg80211_registered_device, wiphy); } /* Note 0 is valid, hence phy0 */ static inline bool wiphy_idx_valid(int wiphy_idx) { return wiphy_idx >= 0; } static inline void cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) { int i; if (!rdev->wowlan) return; for (i = 0; i < rdev->wowlan->n_patterns; i++) kfree(rdev->wowlan->patterns[i].mask); kfree(rdev->wowlan->patterns); kfree(rdev->wowlan); } extern struct workqueue_struct *cfg80211_wq; extern struct mutex cfg80211_mutex; extern struct list_head cfg80211_rdev_list; extern int cfg80211_rdev_list_generation; static inline void assert_cfg80211_lock(void) { lockdep_assert_held(&cfg80211_mutex); } /* * You can use this to mark a wiphy_idx as not having an associated wiphy. * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL */ #define WIPHY_IDX_STALE -1 struct cfg80211_internal_bss { struct list_head list; struct rb_node rbn; unsigned long ts; struct kref ref; atomic_t hold; bool beacon_ies_allocated; bool proberesp_ies_allocated; /* must be last because of priv member */ struct cfg80211_bss pub; }; static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) { return container_of(pub, struct cfg80211_internal_bss, pub); } static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss) { kref_get(&bss->ref); } static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) { atomic_inc(&bss->hold); } static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) { int r = atomic_dec_return(&bss->hold); WARN_ON(r < 0); } struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); int get_wiphy_idx(struct wiphy *wiphy); struct cfg80211_registered_device * __cfg80211_rdev_from_info(struct genl_info *info); /* * This function returns a pointer to the driver * that the genl_info item that is passed refers to. * If successful, it returns non-NULL and also locks * the driver's mutex! * * This means that you need to call cfg80211_unlock_rdev() * before being allowed to acquire &cfg80211_mutex! * * This is necessary because we need to lock the global * mutex to get an item off the list safely, and then * we lock the rdev mutex so it doesn't go away under us. * * We don't want to keep cfg80211_mutex locked * for all the time in order to allow requests on * other interfaces to go through at the same time. * * The result of this can be a PTR_ERR and hence must * be checked with IS_ERR() for errors. */ extern struct cfg80211_registered_device * cfg80211_get_dev_from_info(struct genl_info *info); /* requires cfg80211_rdev_mutex to be held! */ struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ extern struct cfg80211_registered_device * cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, struct net *net); static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) { mutex_lock(&rdev->mtx); } static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) { BUG_ON(IS_ERR(rdev) || !rdev); mutex_unlock(&rdev->mtx); } static inline void wdev_lock(struct wireless_dev *wdev) __acquires(wdev) { mutex_lock(&wdev->mtx); __acquire(wdev->mtx); } static inline void wdev_unlock(struct wireless_dev *wdev) __releases(wdev) { __release(wdev->mtx); mutex_unlock(&wdev->mtx); } #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx) #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) enum cfg80211_event_type { EVENT_CONNECT_RESULT, EVENT_ROAMED, EVENT_DISCONNECTED, EVENT_IBSS_JOINED, }; struct cfg80211_event { struct list_head list; enum cfg80211_event_type type; union { struct { u8 bssid[ETH_ALEN]; const u8 *req_ie; const u8 *resp_ie; size_t req_ie_len; size_t resp_ie_len; u16 status; } cr; struct { struct ieee80211_channel *channel; u8 bssid[ETH_ALEN]; const u8 *req_ie; const u8 *resp_ie; size_t req_ie_len; size_t resp_ie_len; } rm; struct { const u8 *ie; size_t ie_len; u16 reason; } dc; struct { u8 bssid[ETH_ALEN]; } ij; }; }; struct cfg80211_cached_keys { struct key_params params[6]; u8 data[6][WLAN_MAX_KEY_LEN]; int def, defmgmt; }; /* free object */ extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, char *newname); void ieee80211_set_bitrate_flags(struct wiphy *wiphy); void cfg80211_bss_expire(struct cfg80211_registered_device *dev); void cfg80211_bss_age(struct cfg80211_registered_device *dev, unsigned long age_secs); /* IBSS */ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_ibss_params *params, struct cfg80211_cached_keys *connkeys); int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_ibss_params *params, struct cfg80211_cached_keys *connkeys); void cfg80211_clear_ibss(struct net_device *dev, bool nowext); int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, struct net_device *dev, bool nowext); int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, struct net_device *dev, bool nowext); void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev); /* mesh */ extern const struct mesh_config default_mesh_config; extern const struct mesh_setup default_mesh_setup; int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev, struct net_device *dev, const struct mesh_setup *setup, const struct mesh_config *conf); int cfg80211_join_mesh(struct cfg80211_registered_device *rdev, struct net_device *dev, const struct mesh_setup *setup, const struct mesh_config *conf); int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, struct net_device *dev); /* MLME */ int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, enum nl80211_auth_type auth_type, const u8 *bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, const u8 *key, int key_len, int key_idx, bool local_state_change); int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, enum nl80211_auth_type auth_type, const u8 *bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, const u8 *key, int key_len, int key_idx, bool local_state_change); int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, const u8 *bssid, const u8 *prev_bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, bool use_mfp, struct cfg80211_crypto_settings *crypt, u32 assoc_flags, struct ieee80211_ht_cap *ht_capa, struct ieee80211_ht_cap *ht_capa_mask); int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, const u8 *bssid, const u8 *prev_bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, bool use_mfp, struct cfg80211_crypto_settings *crypt, u32 assoc_flags, struct ieee80211_ht_cap *ht_capa, struct ieee80211_ht_cap *ht_capa_mask); int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, struct net_device *dev, const u8 *bssid, const u8 *ie, int ie_len, u16 reason, bool local_state_change); int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, struct net_device *dev, const u8 *bssid, const u8 *ie, int ie_len, u16 reason, bool local_state_change); int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, struct net_device *dev, const u8 *bssid, const u8 *ie, int ie_len, u16 reason, bool local_state_change); void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, struct net_device *dev); void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, const u8 *req_ie, size_t req_ie_len, const u8 *resp_ie, size_t resp_ie_len, u16 status, bool wextev, struct cfg80211_bss *bss); int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, u16 frame_type, const u8 *match_data, int match_len); void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, bool offchan, enum nl80211_channel_type channel_type, bool channel_type_valid, unsigned int wait, const u8 *buf, size_t len, bool no_cck, bool dont_wait_for_ack, u64 *cookie); void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, const struct ieee80211_ht_cap *ht_capa_mask); /* SME */ int __cfg80211_connect(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_connect_params *connect, struct cfg80211_cached_keys *connkeys, const u8 *prev_bssid); int cfg80211_connect(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_connect_params *connect, struct cfg80211_cached_keys *connkeys); int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, struct net_device *dev, u16 reason, bool wextev); int cfg80211_disconnect(struct cfg80211_registered_device *rdev, struct net_device *dev, u16 reason, bool wextev); void __cfg80211_roamed(struct wireless_dev *wdev, struct ieee80211_channel *channel, const u8 *bssid, const u8 *req_ie, size_t req_ie_len, const u8 *resp_ie, size_t resp_ie_len); int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev); void cfg80211_conn_work(struct work_struct *work); void cfg80211_sme_failed_assoc(struct wireless_dev *wdev); bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev); /* internal helpers */ bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, struct key_params *params, int key_idx, bool pairwise, const u8 *mac_addr); void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, size_t ie_len, u16 reason, bool from_ap); void cfg80211_sme_scan_done(struct net_device *dev); void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); void cfg80211_sme_disassoc(struct net_device *dev, int idx); void __cfg80211_scan_done(struct work_struct *wk); void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); void __cfg80211_sched_scan_results(struct work_struct *wk); int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, bool driver_initiated); void cfg80211_upload_connect_keys(struct wireless_dev *wdev); int cfg80211_change_iface(struct cfg80211_registered_device *rdev, struct net_device *dev, enum nl80211_iftype ntype, u32 *flags, struct vif_params *params); void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev, enum nl80211_iftype iftype); static inline int cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, enum nl80211_iftype iftype) { return cfg80211_can_change_interface(rdev, NULL, iftype); } struct ieee80211_channel * rdev_freq_to_chan(struct cfg80211_registered_device *rdev, int freq, enum nl80211_channel_type channel_type); int cfg80211_set_freq(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev, int freq, enum nl80211_channel_type channel_type); u16 cfg80211_calculate_bitrate(struct rate_info *rate); int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, const u8 *rates, unsigned int n_rates, u32 *mask); int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, u32 beacon_int); #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) #else /* * Trick to enable using it as a condition, * and also not give a warning when it's * not used that way. */ #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) #endif #endif /* __NET_WIRELESS_CORE_H */