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Diffstat (limited to 'net/wireless/core.h')
| -rw-r--r-- | net/wireless/core.h | 564 |
1 files changed, 564 insertions, 0 deletions
diff --git a/net/wireless/core.h b/net/wireless/core.h new file mode 100644 index 000000000..a3362a32a --- /dev/null +++ b/net/wireless/core.h @@ -0,0 +1,564 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Wireless configuration interface internals. + * + * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> + * Copyright (C) 2018-2020 Intel Corporation + */ +#ifndef __NET_WIRELESS_CORE_H +#define __NET_WIRELESS_CORE_H +#include <linux/list.h> +#include <linux/netdevice.h> +#include <linux/rbtree.h> +#include <linux/debugfs.h> +#include <linux/rfkill.h> +#include <linux/workqueue.h> +#include <linux/rtnetlink.h> +#include <net/genetlink.h> +#include <net/cfg80211.h> +#include "reg.h" + + +#define WIPHY_IDX_INVALID -1 + +struct cfg80211_registered_device { + const struct cfg80211_ops *ops; + struct list_head list; + + /* rfkill support */ + struct rfkill_ops rfkill_ops; + struct rfkill *rfkill; + struct work_struct rfkill_block; + + /* 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]; + + /* + * the driver requests the regulatory core to set this regulatory + * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED + * devices using the regulatory_set_wiphy_regd() API + */ + const struct ieee80211_regdomain *requested_regd; + + /* 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; + + /* protected by RTNL */ + int devlist_generation, wdev_id; + int opencount; + wait_queue_head_t dev_wait; + + struct list_head beacon_registrations; + spinlock_t beacon_registrations_lock; + + /* protected by RTNL only */ + int num_running_ifaces; + int num_running_monitor_ifaces; + u64 cookie_counter; + + /* BSSes/scanning */ + spinlock_t bss_lock; + struct list_head bss_list; + struct rb_root bss_tree; + u32 bss_generation; + u32 bss_entries; + struct cfg80211_scan_request *scan_req; /* protected by RTNL */ + struct cfg80211_scan_request *int_scan_req; + struct sk_buff *scan_msg; + struct list_head sched_scan_req_list; + time64_t suspend_at; + struct work_struct scan_done_wk; + + struct genl_info *cur_cmd_info; + + struct work_struct conn_work; + struct work_struct event_work; + + struct delayed_work dfs_update_channels_wk; + + /* netlink port which started critical protocol (0 means not started) */ + u32 crit_proto_nlportid; + + struct cfg80211_coalesce *coalesce; + + struct work_struct destroy_work; + struct work_struct sched_scan_stop_wk; + struct work_struct sched_scan_res_wk; + + struct cfg80211_chan_def radar_chandef; + struct work_struct propagate_radar_detect_wk; + + struct cfg80211_chan_def cac_done_chandef; + struct work_struct propagate_cac_done_wk; + + struct work_struct mgmt_registrations_update_wk; + /* lock for all wdev lists */ + spinlock_t mgmt_registrations_lock; + + /* must be last because of the way we do wiphy_priv(), + * and it should at least be aligned to NETDEV_ALIGN */ + struct wiphy wiphy __aligned(NETDEV_ALIGN); +}; + +static inline +struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy) +{ + BUG_ON(!wiphy); + return container_of(wiphy, struct cfg80211_registered_device, wiphy); +} + +static inline void +cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev) +{ +#ifdef CONFIG_PM + int i; + + if (!rdev->wiphy.wowlan_config) + return; + for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++) + kfree(rdev->wiphy.wowlan_config->patterns[i].mask); + kfree(rdev->wiphy.wowlan_config->patterns); + if (rdev->wiphy.wowlan_config->tcp && + rdev->wiphy.wowlan_config->tcp->sock) + sock_release(rdev->wiphy.wowlan_config->tcp->sock); + kfree(rdev->wiphy.wowlan_config->tcp); + kfree(rdev->wiphy.wowlan_config->nd_config); + kfree(rdev->wiphy.wowlan_config); +#endif +} + +static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev) +{ + u64 r = ++rdev->cookie_counter; + + if (WARN_ON(r == 0)) + r = ++rdev->cookie_counter; + + return r; +} + +extern struct workqueue_struct *cfg80211_wq; +extern struct list_head cfg80211_rdev_list; +extern int cfg80211_rdev_list_generation; + +struct cfg80211_internal_bss { + struct list_head list; + struct list_head hidden_list; + struct rb_node rbn; + u64 ts_boottime; + unsigned long ts; + unsigned long refcount; + atomic_t hold; + + /* time at the start of the reception of the first octet of the + * timestamp field of the last beacon/probe received for this BSS. + * The time is the TSF of the BSS specified by %parent_bssid. + */ + u64 parent_tsf; + + /* the BSS according to which %parent_tsf is set. This is set to + * the BSS that the interface that requested the scan was connected to + * when the beacon/probe was received. + */ + u8 parent_bssid[ETH_ALEN] __aligned(2); + + /* 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_hold_bss(struct cfg80211_internal_bss *bss) +{ + atomic_inc(&bss->hold); + if (bss->pub.transmitted_bss) { + bss = container_of(bss->pub.transmitted_bss, + struct cfg80211_internal_bss, pub); + 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); + if (bss->pub.transmitted_bss) { + bss = container_of(bss->pub.transmitted_bss, + struct cfg80211_internal_bss, pub); + 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 wiphy *wiphy_idx_to_wiphy(int wiphy_idx); + +int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, + struct net *net); + +void cfg80211_init_wdev(struct wireless_dev *wdev); +void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev); + +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_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) + +static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev) +{ + ASSERT_RTNL(); + + return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces && + rdev->num_running_ifaces > 0; +} + +enum cfg80211_event_type { + EVENT_CONNECT_RESULT, + EVENT_ROAMED, + EVENT_DISCONNECTED, + EVENT_IBSS_JOINED, + EVENT_STOPPED, + EVENT_PORT_AUTHORIZED, +}; + +struct cfg80211_event { + struct list_head list; + enum cfg80211_event_type type; + + union { + struct cfg80211_connect_resp_params cr; + struct cfg80211_roam_info rm; + struct { + const u8 *ie; + size_t ie_len; + u16 reason; + bool locally_generated; + } dc; + struct { + u8 bssid[ETH_ALEN]; + struct ieee80211_channel *channel; + } ij; + struct { + u8 bssid[ETH_ALEN]; + } pa; + }; +}; + +struct cfg80211_cached_keys { + struct key_params params[CFG80211_MAX_WEP_KEYS]; + u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104]; + int def; +}; + +enum cfg80211_chan_mode { + CHAN_MODE_UNDEFINED, + CHAN_MODE_SHARED, + CHAN_MODE_EXCLUSIVE, +}; + +struct cfg80211_beacon_registration { + struct list_head list; + u32 nlportid; +}; + +struct cfg80211_cqm_config { + u32 rssi_hyst; + s32 last_rssi_event_value; + int n_rssi_thresholds; + s32 rssi_thresholds[]; +}; + +void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev); + +/* free object */ +void cfg80211_dev_free(struct cfg80211_registered_device *rdev); + +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 *rdev); +void cfg80211_bss_age(struct cfg80211_registered_device *rdev, + unsigned long age_secs); +void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, + struct ieee80211_channel *channel); + +/* IBSS */ +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, + struct ieee80211_channel *channel); +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, + struct mesh_setup *setup, + const struct mesh_config *conf); +int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, + struct net_device *dev); +int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, + struct net_device *dev); +int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev, + struct cfg80211_chan_def *chandef); + +/* OCB */ +int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev, + struct net_device *dev, + struct ocb_setup *setup); +int cfg80211_join_ocb(struct cfg80211_registered_device *rdev, + struct net_device *dev, + struct ocb_setup *setup); +int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, + struct net_device *dev); +int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev, + struct net_device *dev); + +/* AP */ +int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, + struct net_device *dev, bool notify); +int cfg80211_stop_ap(struct cfg80211_registered_device *rdev, + struct net_device *dev, bool notify); + +/* 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, + const u8 *auth_data, int auth_data_len); +int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, + struct net_device *dev, + struct ieee80211_channel *chan, + const u8 *bssid, + const u8 *ssid, int ssid_len, + struct cfg80211_assoc_request *req); +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); +int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, + u16 frame_type, const u8 *match_data, + int match_len, bool multicast_rx, + struct netlink_ext_ack *extack); +void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk); +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 wireless_dev *wdev, + struct cfg80211_mgmt_tx_params *params, + u64 *cookie); +void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, + const struct ieee80211_ht_cap *ht_capa_mask); +void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, + const struct ieee80211_vht_cap *vht_capa_mask); + +/* SME events */ +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); +void __cfg80211_connect_result(struct net_device *dev, + struct cfg80211_connect_resp_params *params, + bool wextev); +void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, + size_t ie_len, u16 reason, bool from_ap); +int cfg80211_disconnect(struct cfg80211_registered_device *rdev, + struct net_device *dev, u16 reason, + bool wextev); +void __cfg80211_roamed(struct wireless_dev *wdev, + struct cfg80211_roam_info *info); +void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid); +int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev); +void cfg80211_autodisconnect_wk(struct work_struct *work); + +/* SME implementation */ +void cfg80211_conn_work(struct work_struct *work); +void cfg80211_sme_scan_done(struct net_device *dev); +bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status); +void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len); +void cfg80211_sme_disassoc(struct wireless_dev *wdev); +void cfg80211_sme_deauth(struct wireless_dev *wdev); +void cfg80211_sme_auth_timeout(struct wireless_dev *wdev); +void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev); +void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev); + +/* internal helpers */ +bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher); +bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev, + int key_idx, bool pairwise); +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_scan_done(struct work_struct *wk); +void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, + bool send_message); +void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, + struct cfg80211_sched_scan_request *req); +int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, + bool want_multi); +void cfg80211_sched_scan_results_wk(struct work_struct *work); +int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, + struct cfg80211_sched_scan_request *req, + bool driver_initiated); +int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, + u64 reqid, 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, + struct vif_params *params); +void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); +void cfg80211_process_wdev_events(struct wireless_dev *wdev); + +bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, + u32 center_freq_khz, u32 bw_khz); + +int cfg80211_scan(struct cfg80211_registered_device *rdev); + +extern struct work_struct cfg80211_disconnect_work; + +/** + * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable + * @wiphy: the wiphy to validate against + * @chandef: the channel definition to check + * + * Checks if chandef is usable and we can/need start CAC on such channel. + * + * Return: true if all channels available and at least + * one channel requires CAC (NL80211_DFS_USABLE) + */ +bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef); + +void cfg80211_set_dfs_state(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef, + enum nl80211_dfs_state dfs_state); + +void cfg80211_dfs_channels_update_work(struct work_struct *work); + +unsigned int +cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef); + +void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); + +bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, + struct ieee80211_channel *chan); + +bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); + +bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, + struct ieee80211_channel *chan); + +static inline unsigned int elapsed_jiffies_msecs(unsigned long start) +{ + unsigned long end = jiffies; + + if (end >= start) + return jiffies_to_msecs(end - start); + + return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); +} + +void +cfg80211_get_chan_state(struct wireless_dev *wdev, + struct ieee80211_channel **chan, + enum cfg80211_chan_mode *chanmode, + u8 *radar_detect); + +int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, + struct cfg80211_chan_def *chandef); + +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, + enum nl80211_iftype iftype, u32 beacon_int); + +void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, + enum nl80211_iftype iftype, int num); + +void __cfg80211_leave(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev); +void cfg80211_leave(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev); + +void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev); + +void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev); + +struct cfg80211_internal_bss * +cfg80211_bss_update(struct cfg80211_registered_device *rdev, + struct cfg80211_internal_bss *tmp, + bool signal_valid, unsigned long ts); +#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 + +void cfg80211_cqm_config_free(struct wireless_dev *wdev); + +void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid); +void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev); +void cfg80211_pmsr_free_wk(struct work_struct *work); + +#endif /* __NET_WIRELESS_CORE_H */ |