net/wireless/reg.h

   1 #ifndef __NET_WIRELESS_REG_H
   2 #define __NET_WIRELESS_REG_H
   3
   4 extern const struct ieee80211_regdomain *cfg80211_regdomain;
   5
   6 bool is_world_regdom(const char *alpha2);
   7 bool reg_is_valid_request(const char *alpha2);
   8
   9 int regulatory_hint_user(const char *alpha2);
  10
  11 void reg_device_remove(struct wiphy *wiphy);
  12
  13 int regulatory_init(void);
  14 void regulatory_exit(void);
  15
  16 int set_regdom(const struct ieee80211_regdomain *rd);
  17
  18 /**
  19  * regulatory_hint_found_beacon - hints a beacon was found on a channel
  20  * @wiphy: the wireless device where the beacon was found on
  21  * @beacon_chan: the channel on which the beacon was found on
  22  * @gfp: context flags
  23  *
  24  * This informs the wireless core that a beacon from an AP was found on
  25  * the channel provided. This allows the wireless core to make educated
  26  * guesses on regulatory to help with world roaming. This is only used for
  27  * world roaming -- when we do not know our current location. This is
  28  * only useful on channels 12, 13 and 14 on the 2 GHz band as channels
  29  * 1-11 are already enabled by the world regulatory domain; and on
  30  * non-radar 5 GHz channels.
  31  *
  32  * Drivers do not need to call this, cfg80211 will do it for after a scan
  33  * on a newly found BSS. If you cannot make use of this feature you can
  34  * set the wiphy->disable_beacon_hints to true.
  35  */
  36 int regulatory_hint_found_beacon(struct wiphy *wiphy,
  37                                         struct ieee80211_channel *beacon_chan,
  38                                         gfp_t gfp);
  39
  40 /**
  41  * regulatory_hint_11d - hints a country IE as a regulatory domain
  42  * @wiphy: the wireless device giving the hint (used only for reporting
  43  *      conflicts)
  44  * @band: the band on which the country IE was received on. This determines
  45  *      the band we'll process the country IE channel triplets for.
  46  * @country_ie: pointer to the country IE
  47  * @country_ie_len: length of the country IE
  48  *
  49  * We will intersect the rd with the what CRDA tells us should apply
  50  * for the alpha2 this country IE belongs to, this prevents APs from
  51  * sending us incorrect or outdated information against a country.
  52  *
  53  * The AP is expected to provide Country IE channel triplets for the
  54  * band it is on. It is technically possible for APs to send channel
  55  * country IE triplets even for channels outside of the band they are
  56  * in but for that they would have to use the regulatory extension
  57  * in combination with a triplet but this behaviour is currently
  58  * not observed. For this reason if a triplet is seen with channel
  59  * information for a band the BSS is not present in it will be ignored.
  60  */
  61 void regulatory_hint_11d(struct wiphy *wiphy,
  62                          enum ieee80211_band band,
  63                          u8 *country_ie,
  64                          u8 country_ie_len);
  65
  66 /**
  67  * regulatory_hint_disconnect - informs all devices have been disconneted
  68  *
  69  * Regulotory rules can be enhanced further upon scanning and upon
  70  * connection to an AP. These rules become stale if we disconnect
  71  * and go to another country, whether or not we suspend and resume.
  72  * If we suspend, go to another country and resume we'll automatically
  73  * get disconnected shortly after resuming and things will be reset as well.
  74  * This routine is a helper to restore regulatory settings to how they were
  75  * prior to our first connect attempt. This includes ignoring country IE and
  76  * beacon regulatory hints. The ieee80211_regdom module parameter will always
  77  * be respected but if a user had set the regulatory domain that will take
  78  * precedence.
  79  *
  80  * Must be called from process context.
  81  */
  82 void regulatory_hint_disconnect(void);
  83
  84 #endif  /* __NET_WIRELESS_REG_H */