net/wireless/reg.h

   1 #ifndef __NET_WIRELESS_REG_H
   2 #define __NET_WIRELESS_REG_H
   3 /*
   4  * Copyright 2008-2011  Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
  20
  21 bool reg_is_valid_request(const char *alpha2);
  22 bool is_world_regdom(const char *alpha2);
  23 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region);
  24 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy);
  25
  26 int regulatory_hint_user(const char *alpha2,
  27                          enum nl80211_user_reg_hint_type user_reg_hint_type);
  28 int regulatory_hint_indoor_user(void);
  29
  30 void wiphy_regulatory_register(struct wiphy *wiphy);
  31 void wiphy_regulatory_deregister(struct wiphy *wiphy);
  32
  33 int __init regulatory_init(void);
  34 void regulatory_exit(void);
  35
  36 int set_regdom(const struct ieee80211_regdomain *rd);
  37 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
  38                                    const struct ieee80211_reg_rule *rule);
  39
  40 bool reg_last_request_cell_base(void);
  41
  42 /**
  43  * regulatory_hint_found_beacon - hints a beacon was found on a channel
  44  * @wiphy: the wireless device where the beacon was found on
  45  * @beacon_chan: the channel on which the beacon was found on
  46  * @gfp: context flags
  47  *
  48  * This informs the wireless core that a beacon from an AP was found on
  49  * the channel provided. This allows the wireless core to make educated
  50  * guesses on regulatory to help with world roaming. This is only used for
  51  * world roaming -- when we do not know our current location. This is
  52  * only useful on channels 12, 13 and 14 on the 2 GHz band as channels
  53  * 1-11 are already enabled by the world regulatory domain; and on
  54  * non-radar 5 GHz channels.
  55  *
  56  * Drivers do not need to call this, cfg80211 will do it for after a scan
  57  * on a newly found BSS. If you cannot make use of this feature you can
  58  * set the wiphy->disable_beacon_hints to true.
  59  */
  60 int regulatory_hint_found_beacon(struct wiphy *wiphy,
  61                                  struct ieee80211_channel *beacon_chan,
  62                                  gfp_t gfp);
  63
  64 /**
  65  * regulatory_hint_country_ie - hints a country IE as a regulatory domain
  66  * @wiphy: the wireless device giving the hint (used only for reporting
  67  *      conflicts)
  68  * @band: the band on which the country IE was received on. This determines
  69  *      the band we'll process the country IE channel triplets for.
  70  * @country_ie: pointer to the country IE
  71  * @country_ie_len: length of the country IE
  72  *
  73  * We will intersect the rd with the what CRDA tells us should apply
  74  * for the alpha2 this country IE belongs to, this prevents APs from
  75  * sending us incorrect or outdated information against a country.
  76  *
  77  * The AP is expected to provide Country IE channel triplets for the
  78  * band it is on. It is technically possible for APs to send channel
  79  * country IE triplets even for channels outside of the band they are
  80  * in but for that they would have to use the regulatory extension
  81  * in combination with a triplet but this behaviour is currently
  82  * not observed. For this reason if a triplet is seen with channel
  83  * information for a band the BSS is not present in it will be ignored.
  84  */
  85 void regulatory_hint_country_ie(struct wiphy *wiphy,
  86                          enum ieee80211_band band,
  87                          const u8 *country_ie,
  88                          u8 country_ie_len);
  89
  90 /**
  91  * regulatory_hint_disconnect - informs all devices have been disconneted
  92  *
  93  * Regulotory rules can be enhanced further upon scanning and upon
  94  * connection to an AP. These rules become stale if we disconnect
  95  * and go to another country, whether or not we suspend and resume.
  96  * If we suspend, go to another country and resume we'll automatically
  97  * get disconnected shortly after resuming and things will be reset as well.
  98  * This routine is a helper to restore regulatory settings to how they were
  99  * prior to our first connect attempt. This includes ignoring country IE and
 100  * beacon regulatory hints. The ieee80211_regdom module parameter will always
 101  * be respected but if a user had set the regulatory domain that will take
 102  * precedence.
 103  *
 104  * Must be called from process context.
 105  */
 106 void regulatory_hint_disconnect(void);
 107
 108 /**
 109  * cfg80211_get_unii - get the U-NII band for the frequency
 110  * @freq: the frequency for which we want to get the UNII band.
 111
 112  * Get a value specifying the U-NII band frequency belongs to.
 113  * U-NII bands are defined by the FCC in C.F.R 47 part 15.
 114  *
 115  * Returns -EINVAL if freq is invalid, 0 for UNII-1, 1 for UNII-2A,
 116  * 2 for UNII-2B, 3 for UNII-2C and 4 for UNII-3.
 117  */
 118 int cfg80211_get_unii(int freq);
 119
 120 /**
 121  * regulatory_indoor_allowed - is indoor operation allowed
 122  */
 123 bool regulatory_indoor_allowed(void);
 124
 125 #endif  /* __NET_WIRELESS_REG_H */