409 lines
13 KiB
C
409 lines
13 KiB
C
/*
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* Wireless configuration interface internals.
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*
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* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
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*/
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#ifndef __NET_WIRELESS_CORE_H
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#define __NET_WIRELESS_CORE_H
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/kref.h>
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#include <linux/rbtree.h>
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#include <linux/debugfs.h>
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#include <linux/rfkill.h>
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#include <linux/workqueue.h>
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#include <net/genetlink.h>
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#include <net/cfg80211.h>
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#include "reg.h"
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struct cfg80211_registered_device {
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const struct cfg80211_ops *ops;
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struct list_head list;
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/* we hold this mutex during any call so that
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* we cannot do multiple calls at once, and also
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* to avoid the deregister call to proceed while
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* any call is in progress */
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struct mutex mtx;
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/* rfkill support */
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struct rfkill_ops rfkill_ops;
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struct rfkill *rfkill;
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struct work_struct rfkill_sync;
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/* ISO / IEC 3166 alpha2 for which this device is receiving
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* country IEs on, this can help disregard country IEs from APs
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* on the same alpha2 quickly. The alpha2 may differ from
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* cfg80211_regdomain's alpha2 when an intersection has occurred.
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* If the AP is reconfigured this can also be used to tell us if
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* the country on the country IE changed. */
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char country_ie_alpha2[2];
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/* If a Country IE has been received this tells us the environment
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* which its telling us its in. This defaults to ENVIRON_ANY */
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enum environment_cap env;
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/* wiphy index, internal only */
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int wiphy_idx;
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/* associate netdev list */
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struct mutex devlist_mtx;
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/* protected by devlist_mtx or RCU */
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struct list_head netdev_list;
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int devlist_generation;
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int opencount; /* also protected by devlist_mtx */
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wait_queue_head_t dev_wait;
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/* BSSes/scanning */
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spinlock_t bss_lock;
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struct list_head bss_list;
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struct rb_root bss_tree;
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u32 bss_generation;
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struct cfg80211_scan_request *scan_req; /* protected by RTNL */
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unsigned long suspend_at;
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struct work_struct scan_done_wk;
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#ifdef CONFIG_NL80211_TESTMODE
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struct genl_info *testmode_info;
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#endif
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struct work_struct conn_work;
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struct work_struct event_work;
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/* must be last because of the way we do wiphy_priv(),
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* and it should at least be aligned to NETDEV_ALIGN */
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struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
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};
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static inline
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struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
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{
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BUG_ON(!wiphy);
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return container_of(wiphy, struct cfg80211_registered_device, wiphy);
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}
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/* Note 0 is valid, hence phy0 */
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static inline
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bool wiphy_idx_valid(int wiphy_idx)
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{
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return (wiphy_idx >= 0);
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}
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extern struct workqueue_struct *cfg80211_wq;
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extern struct mutex cfg80211_mutex;
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extern struct list_head cfg80211_rdev_list;
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extern int cfg80211_rdev_list_generation;
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#define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex))
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/*
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* You can use this to mark a wiphy_idx as not having an associated wiphy.
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* It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
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*/
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#define WIPHY_IDX_STALE -1
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struct cfg80211_internal_bss {
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struct list_head list;
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struct rb_node rbn;
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unsigned long ts;
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struct kref ref;
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atomic_t hold;
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bool beacon_ies_allocated;
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bool proberesp_ies_allocated;
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/* must be last because of priv member */
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struct cfg80211_bss pub;
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};
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static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
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{
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return container_of(pub, struct cfg80211_internal_bss, pub);
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}
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static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss)
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{
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kref_get(&bss->ref);
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}
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static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
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{
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atomic_inc(&bss->hold);
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}
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static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
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{
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int r = atomic_dec_return(&bss->hold);
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WARN_ON(r < 0);
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}
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struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
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int get_wiphy_idx(struct wiphy *wiphy);
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struct cfg80211_registered_device *
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__cfg80211_rdev_from_info(struct genl_info *info);
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/*
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* This function returns a pointer to the driver
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* that the genl_info item that is passed refers to.
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* If successful, it returns non-NULL and also locks
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* the driver's mutex!
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*
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* This means that you need to call cfg80211_unlock_rdev()
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* before being allowed to acquire &cfg80211_mutex!
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*
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* This is necessary because we need to lock the global
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* mutex to get an item off the list safely, and then
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* we lock the rdev mutex so it doesn't go away under us.
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*
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* We don't want to keep cfg80211_mutex locked
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* for all the time in order to allow requests on
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* other interfaces to go through at the same time.
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*
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* The result of this can be a PTR_ERR and hence must
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* be checked with IS_ERR() for errors.
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*/
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extern struct cfg80211_registered_device *
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cfg80211_get_dev_from_info(struct genl_info *info);
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/* requires cfg80211_rdev_mutex to be held! */
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struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
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/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
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extern struct cfg80211_registered_device *
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cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
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int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
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struct net *net);
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static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
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{
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mutex_lock(&rdev->mtx);
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}
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static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
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{
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BUG_ON(IS_ERR(rdev) || !rdev);
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mutex_unlock(&rdev->mtx);
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}
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static inline void wdev_lock(struct wireless_dev *wdev)
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__acquires(wdev)
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{
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mutex_lock(&wdev->mtx);
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__acquire(wdev->mtx);
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}
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static inline void wdev_unlock(struct wireless_dev *wdev)
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__releases(wdev)
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{
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__release(wdev->mtx);
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mutex_unlock(&wdev->mtx);
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}
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#define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx));
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#define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx));
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enum cfg80211_event_type {
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EVENT_CONNECT_RESULT,
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EVENT_ROAMED,
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EVENT_DISCONNECTED,
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EVENT_IBSS_JOINED,
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};
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struct cfg80211_event {
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struct list_head list;
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enum cfg80211_event_type type;
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union {
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struct {
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u8 bssid[ETH_ALEN];
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const u8 *req_ie;
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const u8 *resp_ie;
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size_t req_ie_len;
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size_t resp_ie_len;
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u16 status;
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} cr;
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struct {
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u8 bssid[ETH_ALEN];
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const u8 *req_ie;
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const u8 *resp_ie;
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size_t req_ie_len;
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size_t resp_ie_len;
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} rm;
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struct {
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const u8 *ie;
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size_t ie_len;
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u16 reason;
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} dc;
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struct {
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u8 bssid[ETH_ALEN];
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} ij;
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};
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};
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struct cfg80211_cached_keys {
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struct key_params params[6];
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u8 data[6][WLAN_MAX_KEY_LEN];
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int def, defmgmt;
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};
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/* free object */
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extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
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extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
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char *newname);
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void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
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void wiphy_update_regulatory(struct wiphy *wiphy,
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enum nl80211_reg_initiator setby);
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void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
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void cfg80211_bss_age(struct cfg80211_registered_device *dev,
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unsigned long age_secs);
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/* IBSS */
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int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_ibss_params *params,
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struct cfg80211_cached_keys *connkeys);
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int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_ibss_params *params,
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struct cfg80211_cached_keys *connkeys);
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void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
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int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool nowext);
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int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool nowext);
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void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
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int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev);
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/* MLME */
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int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct ieee80211_channel *chan,
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enum nl80211_auth_type auth_type,
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const u8 *bssid,
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const u8 *ssid, int ssid_len,
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const u8 *ie, int ie_len,
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const u8 *key, int key_len, int key_idx,
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bool local_state_change);
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int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
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struct net_device *dev, struct ieee80211_channel *chan,
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enum nl80211_auth_type auth_type, const u8 *bssid,
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const u8 *ssid, int ssid_len,
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const u8 *ie, int ie_len,
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const u8 *key, int key_len, int key_idx,
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bool local_state_change);
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int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct ieee80211_channel *chan,
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const u8 *bssid, const u8 *prev_bssid,
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const u8 *ssid, int ssid_len,
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const u8 *ie, int ie_len, bool use_mfp,
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struct cfg80211_crypto_settings *crypt);
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int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
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struct net_device *dev, struct ieee80211_channel *chan,
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const u8 *bssid, const u8 *prev_bssid,
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const u8 *ssid, int ssid_len,
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const u8 *ie, int ie_len, bool use_mfp,
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struct cfg80211_crypto_settings *crypt);
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int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
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struct net_device *dev, const u8 *bssid,
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const u8 *ie, int ie_len, u16 reason,
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bool local_state_change);
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int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
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struct net_device *dev, const u8 *bssid,
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const u8 *ie, int ie_len, u16 reason,
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bool local_state_change);
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int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
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struct net_device *dev, const u8 *bssid,
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const u8 *ie, int ie_len, u16 reason,
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bool local_state_change);
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void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
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struct net_device *dev);
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void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
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const u8 *req_ie, size_t req_ie_len,
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const u8 *resp_ie, size_t resp_ie_len,
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u16 status, bool wextev,
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struct cfg80211_bss *bss);
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int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid,
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const u8 *match_data, int match_len);
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void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid);
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void cfg80211_mlme_purge_actions(struct wireless_dev *wdev);
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int cfg80211_mlme_action(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct ieee80211_channel *chan,
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enum nl80211_channel_type channel_type,
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bool channel_type_valid,
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const u8 *buf, size_t len, u64 *cookie);
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/* SME */
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int __cfg80211_connect(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_connect_params *connect,
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struct cfg80211_cached_keys *connkeys,
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const u8 *prev_bssid);
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int cfg80211_connect(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_connect_params *connect,
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struct cfg80211_cached_keys *connkeys);
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int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
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struct net_device *dev, u16 reason,
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bool wextev);
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int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
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struct net_device *dev, u16 reason,
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bool wextev);
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void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
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const u8 *req_ie, size_t req_ie_len,
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const u8 *resp_ie, size_t resp_ie_len);
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int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev);
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void cfg80211_conn_work(struct work_struct *work);
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void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
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bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
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/* internal helpers */
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int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
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struct key_params *params, int key_idx,
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const u8 *mac_addr);
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void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
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size_t ie_len, u16 reason, bool from_ap);
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void cfg80211_sme_scan_done(struct net_device *dev);
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void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
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void cfg80211_sme_disassoc(struct net_device *dev, int idx);
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void __cfg80211_scan_done(struct work_struct *wk);
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void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
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void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
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int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
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struct net_device *dev, enum nl80211_iftype ntype,
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u32 *flags, struct vif_params *params);
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void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
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struct ieee80211_channel *
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rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
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int freq, enum nl80211_channel_type channel_type);
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int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev, int freq,
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enum nl80211_channel_type channel_type);
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u16 cfg80211_calculate_bitrate(struct rate_info *rate);
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#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
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#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
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#else
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/*
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* Trick to enable using it as a condition,
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* and also not give a warning when it's
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* not used that way.
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*/
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#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
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#endif
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#endif /* __NET_WIRELESS_CORE_H */
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