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3f2355cb91
This adds country IE parsing to mac80211 and enables its usage within the new regulatory infrastructure in cfg80211. We parse the country IEs only on management beacons for the BSSID you are associated to and disregard the IEs when the country and environment (indoor, outdoor, any) matches the already processed country IE. To avoid following misinformed or outdated APs we build and use a regulatory domain out of the intersection between what the AP provides us on the country IE and what CRDA is aware is allowed on the same country. A secondary device is allowed to follow only the same country IE as it make no sense for two devices on a system to be in two different countries. In the case the AP is using country IEs for an incorrect country the user may help compliance further by setting the regulatory domain before or after the IE is parsed and in that case another intersection will be performed. CONFIG_WIRELESS_OLD_REGULATORY is supported but requires CRDA present. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*
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* Wireless configuration interface internals.
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*
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* Copyright 2006, 2007 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 <net/genetlink.h>
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#include <net/wireless.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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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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/* 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 idx;
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/* associate netdev list */
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struct mutex devlist_mtx;
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struct list_head netdev_list;
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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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extern struct mutex cfg80211_drv_mutex;
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extern struct list_head cfg80211_drv_list;
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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_put_dev()
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* before being allowed to acquire &cfg80211_drv_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 drv mutex so it doesn't go away under us.
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*
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* We don't want to keep cfg80211_drv_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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/* 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(int ifindex);
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extern void cfg80211_put_dev(struct cfg80211_registered_device *drv);
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/* free object */
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extern void cfg80211_dev_free(struct cfg80211_registered_device *drv);
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extern int cfg80211_dev_rename(struct cfg80211_registered_device *drv,
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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, enum reg_set_by setby);
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#endif /* __NET_WIRELESS_CORE_H */
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