linux/net/wireless/reg.h
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   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
  19extern const struct ieee80211_regdomain *cfg80211_regdomain;
  20
  21bool is_world_regdom(const char *alpha2);
  22bool reg_is_valid_request(const char *alpha2);
  23bool reg_supported_dfs_region(u8 dfs_region);
  24
  25int regulatory_hint_user(const char *alpha2,
  26                         enum nl80211_user_reg_hint_type user_reg_hint_type);
  27
  28int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env);
  29void wiphy_regulatory_register(struct wiphy *wiphy);
  30void wiphy_regulatory_deregister(struct wiphy *wiphy);
  31
  32int __init regulatory_init(void);
  33void regulatory_exit(void);
  34
  35int set_regdom(const struct ieee80211_regdomain *rd);
  36
  37bool reg_last_request_cell_base(void);
  38
  39/**
  40 * regulatory_hint_found_beacon - hints a beacon was found on a channel
  41 * @wiphy: the wireless device where the beacon was found on
  42 * @beacon_chan: the channel on which the beacon was found on
  43 * @gfp: context flags
  44 *
  45 * This informs the wireless core that a beacon from an AP was found on
  46 * the channel provided. This allows the wireless core to make educated
  47 * guesses on regulatory to help with world roaming. This is only used for
  48 * world roaming -- when we do not know our current location. This is
  49 * only useful on channels 12, 13 and 14 on the 2 GHz band as channels
  50 * 1-11 are already enabled by the world regulatory domain; and on
  51 * non-radar 5 GHz channels.
  52 *
  53 * Drivers do not need to call this, cfg80211 will do it for after a scan
  54 * on a newly found BSS. If you cannot make use of this feature you can
  55 * set the wiphy->disable_beacon_hints to true.
  56 */
  57int regulatory_hint_found_beacon(struct wiphy *wiphy,
  58                                        struct ieee80211_channel *beacon_chan,
  59                                        gfp_t gfp);
  60
  61/**
  62 * regulatory_hint_11d - hints a country IE as a regulatory domain
  63 * @wiphy: the wireless device giving the hint (used only for reporting
  64 *      conflicts)
  65 * @band: the band on which the country IE was received on. This determines
  66 *      the band we'll process the country IE channel triplets for.
  67 * @country_ie: pointer to the country IE
  68 * @country_ie_len: length of the country IE
  69 *
  70 * We will intersect the rd with the what CRDA tells us should apply
  71 * for the alpha2 this country IE belongs to, this prevents APs from
  72 * sending us incorrect or outdated information against a country.
  73 *
  74 * The AP is expected to provide Country IE channel triplets for the
  75 * band it is on. It is technically possible for APs to send channel
  76 * country IE triplets even for channels outside of the band they are
  77 * in but for that they would have to use the regulatory extension
  78 * in combination with a triplet but this behaviour is currently
  79 * not observed. For this reason if a triplet is seen with channel
  80 * information for a band the BSS is not present in it will be ignored.
  81 */
  82void regulatory_hint_11d(struct wiphy *wiphy,
  83                         enum ieee80211_band band,
  84                         u8 *country_ie,
  85                         u8 country_ie_len);
  86
  87/**
  88 * regulatory_hint_disconnect - informs all devices have been disconneted
  89 *
  90 * Regulotory rules can be enhanced further upon scanning and upon
  91 * connection to an AP. These rules become stale if we disconnect
  92 * and go to another country, whether or not we suspend and resume.
  93 * If we suspend, go to another country and resume we'll automatically
  94 * get disconnected shortly after resuming and things will be reset as well.
  95 * This routine is a helper to restore regulatory settings to how they were
  96 * prior to our first connect attempt. This includes ignoring country IE and
  97 * beacon regulatory hints. The ieee80211_regdom module parameter will always
  98 * be respected but if a user had set the regulatory domain that will take
  99 * precedence.
 100 *
 101 * Must be called from process context.
 102 */
 103void regulatory_hint_disconnect(void);
 104
 105#endif  /* __NET_WIRELESS_REG_H */
 106
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