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 enum ieee80211_regd_source {
  20         REGD_SOURCE_INTERNAL_DB,
  21         REGD_SOURCE_CRDA,
  22 };
  23
  24 extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
  25
  26 bool reg_is_valid_request(const char *alpha2);
  27 bool is_world_regdom(const char *alpha2);
  28 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region);
  29 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy);
  30
  31 int regulatory_hint_user(const char *alpha2,
  32                          enum nl80211_user_reg_hint_type user_reg_hint_type);
  33
  34 /**
  35  * regulatory_hint_indoor - hint operation in indoor env. or not
  36  * @is_indoor: if true indicates that user space thinks that the
  37  * device is operating in an indoor environment.
  38  * @portid: the netlink port ID on which the hint was given.
  39  */
  40 int regulatory_hint_indoor(bool is_indoor, u32 portid);
  41
  42 /**
  43  * regulatory_netlink_notify - notify on released netlink socket
  44  * @portid: the netlink socket port ID
  45  */
  46 void regulatory_netlink_notify(u32 portid);
  47
  48 void wiphy_regulatory_register(struct wiphy *wiphy);
  49 void wiphy_regulatory_deregister(struct wiphy *wiphy);
  50
  51 int __init regulatory_init(void);
  52 void regulatory_exit(void);
  53
  54 int set_regdom(const struct ieee80211_regdomain *rd,
  55                enum ieee80211_regd_source regd_src);
  56
  57 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
  58                                    const struct ieee80211_reg_rule *rule);
  59
  60 bool reg_last_request_cell_base(void);
  61 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy);
  62
  63 /**
  64  * regulatory_hint_found_beacon - hints a beacon was found on a channel
  65  * @wiphy: the wireless device where the beacon was found on
  66  * @beacon_chan: the channel on which the beacon was found on
  67  * @gfp: context flags
  68  *
  69  * This informs the wireless core that a beacon from an AP was found on
  70  * the channel provided. This allows the wireless core to make educated
  71  * guesses on regulatory to help with world roaming. This is only used for
  72  * world roaming -- when we do not know our current location. This is
  73  * only useful on channels 12, 13 and 14 on the 2 GHz band as channels
  74  * 1-11 are already enabled by the world regulatory domain; and on
  75  * non-radar 5 GHz channels.
  76  *
  77  * Drivers do not need to call this, cfg80211 will do it for after a scan
  78  * on a newly found BSS. If you cannot make use of this feature you can
  79  * set the wiphy->disable_beacon_hints to true.
  80  */
  81 int regulatory_hint_found_beacon(struct wiphy *wiphy,
  82                                  struct ieee80211_channel *beacon_chan,
  83                                  gfp_t gfp);
  84
  85 /**
  86  * regulatory_hint_country_ie - hints a country IE as a regulatory domain
  87  * @wiphy: the wireless device giving the hint (used only for reporting
  88  *      conflicts)
  89  * @band: the band on which the country IE was received on. This determines
  90  *      the band we'll process the country IE channel triplets for.
  91  * @country_ie: pointer to the country IE
  92  * @country_ie_len: length of the country IE
  93  *
  94  * We will intersect the rd with the what CRDA tells us should apply
  95  * for the alpha2 this country IE belongs to, this prevents APs from
  96  * sending us incorrect or outdated information against a country.
  97  *
  98  * The AP is expected to provide Country IE channel triplets for the
  99  * band it is on. It is technically possible for APs to send channel
 100  * country IE triplets even for channels outside of the band they are
 101  * in but for that they would have to use the regulatory extension
 102  * in combination with a triplet but this behaviour is currently
 103  * not observed. For this reason if a triplet is seen with channel
 104  * information for a band the BSS is not present in it will be ignored.
 105  */
 106 void regulatory_hint_country_ie(struct wiphy *wiphy,
 107                          enum ieee80211_band band,
 108                          const u8 *country_ie,
 109                          u8 country_ie_len);
 110
 111 /**
 112  * regulatory_hint_disconnect - informs all devices have been disconneted
 113  *
 114  * Regulotory rules can be enhanced further upon scanning and upon
 115  * connection to an AP. These rules become stale if we disconnect
 116  * and go to another country, whether or not we suspend and resume.
 117  * If we suspend, go to another country and resume we'll automatically
 118  * get disconnected shortly after resuming and things will be reset as well.
 119  * This routine is a helper to restore regulatory settings to how they were
 120  * prior to our first connect attempt. This includes ignoring country IE and
 121  * beacon regulatory hints. The ieee80211_regdom module parameter will always
 122  * be respected but if a user had set the regulatory domain that will take
 123  * precedence.
 124  *
 125  * Must be called from process context.
 126  */
 127 void regulatory_hint_disconnect(void);
 128
 129 /**
 130  * cfg80211_get_unii - get the U-NII band for the frequency
 131  * @freq: the frequency for which we want to get the UNII band.
 132
 133  * Get a value specifying the U-NII band frequency belongs to.
 134  * U-NII bands are defined by the FCC in C.F.R 47 part 15.
 135  *
 136  * Returns -EINVAL if freq is invalid, 0 for UNII-1, 1 for UNII-2A,
 137  * 2 for UNII-2B, 3 for UNII-2C and 4 for UNII-3.
 138  */
 139 int cfg80211_get_unii(int freq);
 140
 141 /**
 142  * regulatory_indoor_allowed - is indoor operation allowed
 143  */
 144 bool regulatory_indoor_allowed(void);
 145
 146 #endif  /* __NET_WIRELESS_REG_H */