1 #ifndef __NET_WIRELESS_REG_H 2 #define __NET_WIRELESS_REG_H 3 4 #include <net/cfg80211.h> 5 6 /* 7 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> 8 * Copyright (C) 2019 Intel Corporation 9 * 10 * Permission to use, copy, modify, and/or distribute this software for any 11 * purpose with or without fee is hereby granted, provided that the above 12 * copyright notice and this permission notice appear in all copies. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 */ 22 23 enum ieee80211_regd_source { 24 REGD_SOURCE_INTERNAL_DB, 25 REGD_SOURCE_CRDA, 26 REGD_SOURCE_CACHED, 27 }; 28 29 extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain; 30 31 bool reg_is_valid_request(const char *alpha2); 32 bool is_world_regdom(const char *alpha2); 33 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region); 34 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy); 35 36 int regulatory_hint_user(const char *alpha2, 37 enum nl80211_user_reg_hint_type user_reg_hint_type); 38 39 /** 40 * regulatory_hint_indoor - hint operation in indoor env. or not 41 * @is_indoor: if true indicates that user space thinks that the 42 * device is operating in an indoor environment. 43 * @portid: the netlink port ID on which the hint was given. 44 */ 45 int regulatory_hint_indoor(bool is_indoor, u32 portid); 46 47 /** 48 * regulatory_netlink_notify - notify on released netlink socket 49 * @portid: the netlink socket port ID 50 */ 51 void regulatory_netlink_notify(u32 portid); 52 53 void wiphy_regulatory_register(struct wiphy *wiphy); 54 void wiphy_regulatory_deregister(struct wiphy *wiphy); 55 56 int __init regulatory_init(void); 57 void regulatory_exit(void); 58 59 int set_regdom(const struct ieee80211_regdomain *rd, 60 enum ieee80211_regd_source regd_src); 61 62 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, 63 const struct ieee80211_reg_rule *rule); 64 65 bool reg_last_request_cell_base(void); 66 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy); 67 68 /** 69 * regulatory_hint_found_beacon - hints a beacon was found on a channel 70 * @wiphy: the wireless device where the beacon was found on 71 * @beacon_chan: the channel on which the beacon was found on 72 * @gfp: context flags 73 * 74 * This informs the wireless core that a beacon from an AP was found on 75 * the channel provided. This allows the wireless core to make educated 76 * guesses on regulatory to help with world roaming. This is only used for 77 * world roaming -- when we do not know our current location. This is 78 * only useful on channels 12, 13 and 14 on the 2 GHz band as channels 79 * 1-11 are already enabled by the world regulatory domain; and on 80 * non-radar 5 GHz channels. 81 * 82 * Drivers do not need to call this, cfg80211 will do it for after a scan 83 * on a newly found BSS. If you cannot make use of this feature you can 84 * set the wiphy->disable_beacon_hints to true. 85 */ 86 int regulatory_hint_found_beacon(struct wiphy *wiphy, 87 struct ieee80211_channel *beacon_chan, 88 gfp_t gfp); 89 90 /** 91 * regulatory_hint_country_ie - hints a country IE as a regulatory domain 92 * @wiphy: the wireless device giving the hint (used only for reporting 93 * conflicts) 94 * @band: the band on which the country IE was received on. This determines 95 * the band we'll process the country IE channel triplets for. 96 * @country_ie: pointer to the country IE 97 * @country_ie_len: length of the country IE 98 * 99 * We will intersect the rd with the what CRDA tells us should apply 100 * for the alpha2 this country IE belongs to, this prevents APs from 101 * sending us incorrect or outdated information against a country. 102 * 103 * The AP is expected to provide Country IE channel triplets for the 104 * band it is on. It is technically possible for APs to send channel 105 * country IE triplets even for channels outside of the band they are 106 * in but for that they would have to use the regulatory extension 107 * in combination with a triplet but this behaviour is currently 108 * not observed. For this reason if a triplet is seen with channel 109 * information for a band the BSS is not present in it will be ignored. 110 */ 111 void regulatory_hint_country_ie(struct wiphy *wiphy, 112 enum nl80211_band band, 113 const u8 *country_ie, 114 u8 country_ie_len); 115 116 /** 117 * regulatory_hint_disconnect - informs all devices have been disconneted 118 * 119 * Regulotory rules can be enhanced further upon scanning and upon 120 * connection to an AP. These rules become stale if we disconnect 121 * and go to another country, whether or not we suspend and resume. 122 * If we suspend, go to another country and resume we'll automatically 123 * get disconnected shortly after resuming and things will be reset as well. 124 * This routine is a helper to restore regulatory settings to how they were 125 * prior to our first connect attempt. This includes ignoring country IE and 126 * beacon regulatory hints. The ieee80211_regdom module parameter will always 127 * be respected but if a user had set the regulatory domain that will take 128 * precedence. 129 * 130 * Must be called from process context. 131 */ 132 void regulatory_hint_disconnect(void); 133 134 /** 135 * cfg80211_get_unii - get the U-NII band for the frequency 136 * @freq: the frequency for which we want to get the UNII band. 137 138 * Get a value specifying the U-NII band frequency belongs to. 139 * U-NII bands are defined by the FCC in C.F.R 47 part 15. 140 * 141 * Returns -EINVAL if freq is invalid, 0 for UNII-1, 1 for UNII-2A, 142 * 2 for UNII-2B, 3 for UNII-2C and 4 for UNII-3. 143 */ 144 int cfg80211_get_unii(int freq); 145 146 /** 147 * regulatory_indoor_allowed - is indoor operation allowed 148 */ 149 bool regulatory_indoor_allowed(void); 150 151 /* 152 * Grace period to timeout pre-CAC results on the dfs channels. This timeout 153 * value is used for Non-ETSI domain. 154 * TODO: May be make this timeout available through regdb? 155 */ 156 #define REG_PRE_CAC_EXPIRY_GRACE_MS 2000 157 158 /** 159 * regulatory_pre_cac_allowed - if pre-CAC allowed in the current dfs domain 160 * @wiphy: wiphy for which pre-CAC capability is checked. 161 162 * Pre-CAC is allowed only in ETSI domain. 163 */ 164 bool regulatory_pre_cac_allowed(struct wiphy *wiphy); 165 166 /** 167 * regulatory_propagate_dfs_state - Propagate DFS channel state to other wiphys 168 * @wiphy - wiphy on which radar is detected and the event will be propagated 169 * to other available wiphys having the same DFS domain 170 * @chandef - Channel definition of radar detected channel 171 * @dfs_state - DFS channel state to be set 172 * @event - Type of radar event which triggered this DFS state change 173 * 174 * This function should be called with rtnl lock held. 175 */ 176 void regulatory_propagate_dfs_state(struct wiphy *wiphy, 177 struct cfg80211_chan_def *chandef, 178 enum nl80211_dfs_state dfs_state, 179 enum nl80211_radar_event event); 180 181 /** 182 * reg_dfs_domain_same - Checks if both wiphy have same DFS domain configured 183 * @wiphy1 - wiphy it's dfs_region to be checked against that of wiphy2 184 * @wiphy2 - wiphy it's dfs_region to be checked against that of wiphy1 185 */ 186 bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2); 187 188 /** 189 * reg_reload_regdb - reload the regulatory.db firmware file 190 */ 191 int reg_reload_regdb(void); 192 193 extern const u8 shipped_regdb_certs[]; 194 extern unsigned int shipped_regdb_certs_len; 195 extern const u8 extra_regdb_certs[]; 196 extern unsigned int extra_regdb_certs_len; 197 198 #endif /* __NET_WIRELESS_REG_H */ 199