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 enum ieee80211_regd_source { 20 REGD_SOURCE_INTERNAL_DB, 21 REGD_SOURCE_CRDA, 22 }; 23 24 extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain; 25 26 bool reg_is_valid_request(const char *alpha2); 27 bool is_world_regdom(const char *alpha2); 28 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region); 29 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy); 30 31 int regulatory_hint_user(const char *alpha2, 32 enum nl80211_user_reg_hint_type user_reg_hint_type); 33 34 /** 35 * regulatory_hint_indoor - hint operation in indoor env. or not 36 * @is_indoor: if true indicates that user space thinks that the 37 * device is operating in an indoor environment. 38 * @portid: the netlink port ID on which the hint was given. 39 */ 40 int regulatory_hint_indoor(bool is_indoor, u32 portid); 41 42 /** 43 * regulatory_netlink_notify - notify on released netlink socket 44 * @portid: the netlink socket port ID 45 */ 46 void regulatory_netlink_notify(u32 portid); 47 48 void wiphy_regulatory_register(struct wiphy *wiphy); 49 void wiphy_regulatory_deregister(struct wiphy *wiphy); 50 51 int __init regulatory_init(void); 52 void regulatory_exit(void); 53 54 int set_regdom(const struct ieee80211_regdomain *rd, 55 enum ieee80211_regd_source regd_src); 56 57 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, 58 const struct ieee80211_reg_rule *rule); 59 60 bool reg_last_request_cell_base(void); 61 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy); 62 63 /** 64 * regulatory_hint_found_beacon - hints a beacon was found on a channel 65 * @wiphy: the wireless device where the beacon was found on 66 * @beacon_chan: the channel on which the beacon was found on 67 * @gfp: context flags 68 * 69 * This informs the wireless core that a beacon from an AP was found on 70 * the channel provided. This allows the wireless core to make educated 71 * guesses on regulatory to help with world roaming. This is only used for 72 * world roaming -- when we do not know our current location. This is 73 * only useful on channels 12, 13 and 14 on the 2 GHz band as channels 74 * 1-11 are already enabled by the world regulatory domain; and on 75 * non-radar 5 GHz channels. 76 * 77 * Drivers do not need to call this, cfg80211 will do it for after a scan 78 * on a newly found BSS. If you cannot make use of this feature you can 79 * set the wiphy->disable_beacon_hints to true. 80 */ 81 int regulatory_hint_found_beacon(struct wiphy *wiphy, 82 struct ieee80211_channel *beacon_chan, 83 gfp_t gfp); 84 85 /** 86 * regulatory_hint_country_ie - hints a country IE as a regulatory domain 87 * @wiphy: the wireless device giving the hint (used only for reporting 88 * conflicts) 89 * @band: the band on which the country IE was received on. This determines 90 * the band we'll process the country IE channel triplets for. 91 * @country_ie: pointer to the country IE 92 * @country_ie_len: length of the country IE 93 * 94 * We will intersect the rd with the what CRDA tells us should apply 95 * for the alpha2 this country IE belongs to, this prevents APs from 96 * sending us incorrect or outdated information against a country. 97 * 98 * The AP is expected to provide Country IE channel triplets for the 99 * band it is on. It is technically possible for APs to send channel 100 * country IE triplets even for channels outside of the band they are 101 * in but for that they would have to use the regulatory extension 102 * in combination with a triplet but this behaviour is currently 103 * not observed. For this reason if a triplet is seen with channel 104 * information for a band the BSS is not present in it will be ignored. 105 */ 106 void regulatory_hint_country_ie(struct wiphy *wiphy, 107 enum ieee80211_band band, 108 const u8 *country_ie, 109 u8 country_ie_len); 110 111 /** 112 * regulatory_hint_disconnect - informs all devices have been disconneted 113 * 114 * Regulotory rules can be enhanced further upon scanning and upon 115 * connection to an AP. These rules become stale if we disconnect 116 * and go to another country, whether or not we suspend and resume. 117 * If we suspend, go to another country and resume we'll automatically 118 * get disconnected shortly after resuming and things will be reset as well. 119 * This routine is a helper to restore regulatory settings to how they were 120 * prior to our first connect attempt. This includes ignoring country IE and 121 * beacon regulatory hints. The ieee80211_regdom module parameter will always 122 * be respected but if a user had set the regulatory domain that will take 123 * precedence. 124 * 125 * Must be called from process context. 126 */ 127 void regulatory_hint_disconnect(void); 128 129 /** 130 * cfg80211_get_unii - get the U-NII band for the frequency 131 * @freq: the frequency for which we want to get the UNII band. 132 133 * Get a value specifying the U-NII band frequency belongs to. 134 * U-NII bands are defined by the FCC in C.F.R 47 part 15. 135 * 136 * Returns -EINVAL if freq is invalid, 0 for UNII-1, 1 for UNII-2A, 137 * 2 for UNII-2B, 3 for UNII-2C and 4 for UNII-3. 138 */ 139 int cfg80211_get_unii(int freq); 140 141 /** 142 * regulatory_indoor_allowed - is indoor operation allowed 143 */ 144 bool regulatory_indoor_allowed(void); 145 146 #endif /* __NET_WIRELESS_REG_H */ 147