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