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When devices are world roaming they cannot beacon or do active scan on 5 GHz or on channels 12, 13 and 14 on the 2 GHz band. Although we have a good regulatory API some cards may _always_ world roam, this is also true when a system does not have CRDA present. Devices doing world roaming can still passive scan, if they find a beacon from an AP on one of the world roaming frequencies we make the assumption we can do the same and we also remove the passive scan requirement. This adds support for providing beacon regulatory hints based on scans. This works for devices that do either hardware or software scanning. If a channel has not yet been marked as having had a beacon present on it we queue the beacon hint processing into the workqueue. All wireless devices will benefit from beacon regulatory hints from any wireless device on a system including new devices connected to the system at a later time. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
#ifndef __NET_WIRELESS_REG_H
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#define __NET_WIRELESS_REG_H
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extern const struct ieee80211_regdomain *cfg80211_regdomain;
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bool is_world_regdom(const char *alpha2);
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bool reg_is_valid_request(const char *alpha2);
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int regulatory_hint_user(const char *alpha2);
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void reg_device_remove(struct wiphy *wiphy);
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int regulatory_init(void);
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void regulatory_exit(void);
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int set_regdom(const struct ieee80211_regdomain *rd);
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/**
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* __regulatory_hint - hint to the wireless core a regulatory domain
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* @wiphy: if the hint comes from country information from an AP, this
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* is required to be set to the wiphy that received the information
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* @alpha2: the ISO/IEC 3166 alpha2 being claimed the regulatory domain
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* should be in.
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* @country_ie_checksum: checksum of processed country IE, set this to 0
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* if the hint did not come from a country IE
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* @country_ie_env: the environment the IE told us we are in, %ENVIRON_*
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*
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* The Wireless subsystem can use this function to hint to the wireless core
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* what it believes should be the current regulatory domain by giving it an
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* ISO/IEC 3166 alpha2 country code it knows its regulatory domain should be
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* in.
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*
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* Returns zero if all went fine, %-EALREADY if a regulatory domain had
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* already been set or other standard error codes.
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*
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*/
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extern int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
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const char *alpha2, u32 country_ie_checksum,
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enum environment_cap country_ie_env);
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/**
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* regulatory_hint_found_beacon - hints a beacon was found on a channel
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* @wiphy: the wireless device where the beacon was found on
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* @beacon_chan: the channel on which the beacon was found on
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* @gfp: context flags
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*
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* This informs the wireless core that a beacon from an AP was found on
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* the channel provided. This allows the wireless core to make educated
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* guesses on regulatory to help with world roaming. This is only used for
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* world roaming -- when we do not know our current location. This is
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* only useful on channels 12, 13 and 14 on the 2 GHz band as channels
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* 1-11 are already enabled by the world regulatory domain; and on
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* non-radar 5 GHz channels.
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*
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* Drivers do not need to call this, cfg80211 will do it for after a scan
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* on a newly found BSS.
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*/
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int regulatory_hint_found_beacon(struct wiphy *wiphy,
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struct ieee80211_channel *beacon_chan,
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gfp_t gfp);
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#endif /* __NET_WIRELESS_REG_H */
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