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 *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
  27int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env);
  28void reg_device_remove(struct wiphy *wiphy);
  29
  30int __init regulatory_init(void);
  31void regulatory_exit(void);
  32
  33int set_regdom(const struct ieee80211_regdomain *rd);
  34
  35void regulatory_update(struct wiphy *wiphy, enum nl80211_reg_initiator setby);
  36
  37/**
  38 * regulatory_hint_found_beacon - hints a beacon was found on a channel
  39 * @wiphy: the wireless device where the beacon was found on
  40 * @beacon_chan: the channel on which the beacon was found on
  41 * @gfp: context flags
  42 *
  43 * This informs the wireless core that a beacon from an AP was found on
  44 * the channel provided. This allows the wireless core to make educated
  45 * guesses on regulatory to help with world roaming. This is only used for
  46 * world roaming -- when we do not know our current location. This is
  47 * only useful on channels 12, 13 and 14 on the 2 GHz band as channels
  48 * 1-11 are already enabled by the world regulatory domain; and on
  49 * non-radar 5 GHz channels.
  50 *
  51 * Drivers do not need to call this, cfg80211 will do it for after a scan
  52 * on a newly found BSS. If you cannot make use of this feature you can
  53 * set the wiphy->disable_beacon_hints to true.
  54 */
  55int regulatory_hint_found_beacon(struct wiphy *wiphy,
  56                                        struct ieee80211_channel *beacon_chan,
  57                                        gfp_t gfp);
  58
  59/**
  60 * regulatory_hint_11d - hints a country IE as a regulatory domain
  61 * @wiphy: the wireless device giving the hint (used only for reporting
  62 *      conflicts)
  63 * @band: the band on which the country IE was received on. This determines
  64 *      the band we'll process the country IE channel triplets for.
  65 * @country_ie: pointer to the country IE
  66 * @country_ie_len: length of the country IE
  67 *
  68 * We will intersect the rd with the what CRDA tells us should apply
  69 * for the alpha2 this country IE belongs to, this prevents APs from
  70 * sending us incorrect or outdated information against a country.
  71 *
  72 * The AP is expected to provide Country IE channel triplets for the
  73 * band it is on. It is technically possible for APs to send channel
  74 * country IE triplets even for channels outside of the band they are
  75 * in but for that they would have to use the regulatory extension
  76 * in combination with a triplet but this behaviour is currently
  77 * not observed. For this reason if a triplet is seen with channel
  78 * information for a band the BSS is not present in it will be ignored.
  79 */
  80void regulatory_hint_11d(struct wiphy *wiphy,
  81                         enum ieee80211_band band,
  82                         u8 *country_ie,
  83                         u8 country_ie_len);
  84
  85/**
  86 * regulatory_hint_disconnect - informs all devices have been disconneted
  87 *
  88 * Regulotory rules can be enhanced further upon scanning and upon
  89 * connection to an AP. These rules become stale if we disconnect
  90 * and go to another country, whether or not we suspend and resume.
  91 * If we suspend, go to another country and resume we'll automatically
  92 * get disconnected shortly after resuming and things will be reset as well.
  93 * This routine is a helper to restore regulatory settings to how they were
  94 * prior to our first connect attempt. This includes ignoring country IE and
  95 * beacon regulatory hints. The ieee80211_regdom module parameter will always
  96 * be respected but if a user had set the regulatory domain that will take
  97 * precedence.
  98 *
  99 * Must be called from process context.
 100 */
 101void regulatory_hint_disconnect(void);
 102
 103#endif  /* __NET_WIRELESS_REG_H */
 104