text: #ifndef __NET_REGULATORY_H
  #define __NET_REGULATORY_H
  /*
   * regulatory support structures
   *
   * Copyright 2008-2009	Luis R. Rodriguez <lrodriguez@atheros.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  
  /**
   * enum environment_cap - Environment parsed from country IE
   * @ENVIRON_ANY: indicates country IE applies to both indoor and
   *	outdoor operation.
   * @ENVIRON_INDOOR: indicates country IE applies only to indoor operation
   * @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation
   */
  enum environment_cap {
  	ENVIRON_ANY,
  	ENVIRON_INDOOR,
  	ENVIRON_OUTDOOR,
  };
  
  /**
   * struct regulatory_request - used to keep track of regulatory requests
   *
   * @wiphy_idx: this is set if this request's initiator is
   * 	%REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
   * 	can be used by the wireless core to deal with conflicts
   * 	and potentially inform users of which devices specifically
   * 	cased the conflicts.
   * @initiator: indicates who sent this request, could be any of
   * 	of those set in nl80211_reg_initiator (%NL80211_REGDOM_SET_BY_*)
   * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
   * 	regulatory domain. We have a few special codes:
   * 	00 - World regulatory domain
   * 	99 - built by driver but a specific alpha2 cannot be determined
   * 	98 - result of an intersection between two regulatory domains
   *	97 - regulatory domain has not yet been configured
   * @intersect: indicates whether the wireless core should intersect
   * 	the requested regulatory domain with the presently set regulatory
   * 	domain.
   * @processed: indicates whether or not this requests has already been
   *	processed. When the last request is processed it means that the
   *	currently regulatory domain set on cfg80211 is updated from
   *	CRDA and can be used by other regulatory requests. When a
   *	the last request is not yet processed we must yield until it
   *	is processed before processing any new requests.
   * @country_ie_checksum: checksum of the last processed and accepted
   * 	country IE
   * @country_ie_env: lets us know if the AP is telling us we are outdoor,
   * 	indoor, or if it doesn't matter
   * @list: used to insert into the reg_requests_list linked list
   */
  struct regulatory_request {
  	int wiphy_idx;
  	enum nl80211_reg_initiator initiator;
  	char alpha2[2];
  	bool intersect;
  	bool processed;
  	enum environment_cap country_ie_env;
  	struct list_head list;
  };
  
  struct ieee80211_freq_range {
  	u32 start_freq_khz;
  	u32 end_freq_khz;
  	u32 max_bandwidth_khz;
  };
  
  struct ieee80211_power_rule {
  	u32 max_antenna_gain;
  	u32 max_eirp;
  };
  
  struct ieee80211_reg_rule {
  	struct ieee80211_freq_range freq_range;
  	struct ieee80211_power_rule power_rule;
  	u32 flags;
  };
  
  struct ieee80211_regdomain {
  	u32 n_reg_rules;
  	char alpha2[2];
  	struct ieee80211_reg_rule reg_rules[];
  };
  
  #define MHZ_TO_KHZ(freq) ((freq) * 1000)
  #define KHZ_TO_MHZ(freq) ((freq) / 1000)
  #define DBI_TO_MBI(gain) ((gain) * 100)
  #define MBI_TO_DBI(gain) ((gain) / 100)
  #define DBM_TO_MBM(gain) ((gain) * 100)
  #define MBM_TO_DBM(gain) ((gain) / 100)
  
  #define REG_RULE(start, end, bw, gain, eirp, reg_flags) \
  {							\
  	.freq_range.start_freq_khz = MHZ_TO_KHZ(start),	\
  	.freq_range.end_freq_khz = MHZ_TO_KHZ(end),	\
  	.freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw),	\
  	.power_rule.max_antenna_gain = DBI_TO_MBI(gain),\
  	.power_rule.max_eirp = DBM_TO_MBM(eirp),	\
  	.flags = reg_flags,				\
  }
  
  #endif
  