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