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 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy);
  42
  43 /**
  44  * regulatory_hint_found_beacon - hints a beacon was found on a channel
  45  * @wiphy: the wireless device where the beacon was found on
  46  * @beacon_chan: the channel on which the beacon was found on
  47  * @gfp: context flags
  48  *
  49  * This informs the wireless core that a beacon from an AP was found on
  50  * the channel provided. This allows the wireless core to make educated
  51  * guesses on regulatory to help with world roaming. This is only used for
  52  * world roaming -- when we do not know our current location. This is
  53  * only useful on channels 12, 13 and 14 on the 2 GHz band as channels
  54  * 1-11 are already enabled by the world regulatory domain; and on
  55  * non-radar 5 GHz channels.
  56  *
  57  * Drivers do not need to call this, cfg80211 will do it for after a scan
  58  * on a newly found BSS. If you cannot make use of this feature you can
  59  * set the wiphy->disable_beacon_hints to true.
  60  */
  61 int regulatory_hint_found_beacon(struct wiphy *wiphy,
  62                                  struct ieee80211_channel *beacon_chan,
  63                                  gfp_t gfp);
  64
  65 /**
  66  * regulatory_hint_country_ie - hints a country IE as a regulatory domain
  67  * @wiphy: the wireless device giving the hint (used only for reporting
  68  *      conflicts)
  69  * @band: the band on which the country IE was received on. This determines
  70  *      the band we'll process the country IE channel triplets for.
  71  * @country_ie: pointer to the country IE
  72  * @country_ie_len: length of the country IE
  73  *
  74  * We will intersect the rd with the what CRDA tells us should apply
  75  * for the alpha2 this country IE belongs to, this prevents APs from
  76  * sending us incorrect or outdated information against a country.
  77  *
  78  * The AP is expected to provide Country IE channel triplets for the
  79  * band it is on. It is technically possible for APs to send channel
  80  * country IE triplets even for channels outside of the band they are
  81  * in but for that they would have to use the regulatory extension
  82  * in combination with a triplet but this behaviour is currently
  83  * not observed. For this reason if a triplet is seen with channel
  84  * information for a band the BSS is not present in it will be ignored.
  85  */
  86 void regulatory_hint_country_ie(struct wiphy *wiphy,
  87                          enum ieee80211_band band,
  88                          const u8 *country_ie,
  89                          u8 country_ie_len);
  90
  91 /**
  92  * regulatory_hint_disconnect - informs all devices have been disconneted
  93  *
  94  * Regulotory rules can be enhanced further upon scanning and upon
  95  * connection to an AP. These rules become stale if we disconnect
  96  * and go to another country, whether or not we suspend and resume.
  97  * If we suspend, go to another country and resume we'll automatically
  98  * get disconnected shortly after resuming and things will be reset as well.
  99  * This routine is a helper to restore regulatory settings to how they were
 100  * prior to our first connect attempt. This includes ignoring country IE and
 101  * beacon regulatory hints. The ieee80211_regdom module parameter will always
 102  * be respected but if a user had set the regulatory domain that will take
 103  * precedence.
 104  *
 105  * Must be called from process context.
 106  */
 107 void regulatory_hint_disconnect(void);
 108
 109 /**
 110  * cfg80211_get_unii - get the U-NII band for the frequency
 111  * @freq: the frequency for which we want to get the UNII band.
 112
 113  * Get a value specifying the U-NII band frequency belongs to.
 114  * U-NII bands are defined by the FCC in C.F.R 47 part 15.
 115  *
 116  * Returns -EINVAL if freq is invalid, 0 for UNII-1, 1 for UNII-2A,
 117  * 2 for UNII-2B, 3 for UNII-2C and 4 for UNII-3.
 118  */
 119 int cfg80211_get_unii(int freq);
 120
 121 /**
 122  * regulatory_indoor_allowed - is indoor operation allowed
 123  */
 124 bool regulatory_indoor_allowed(void);
 125
 126 #endif  /* __NET_WIRELESS_REG_H */