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/net/wireless/reg.h

http://github.com/mirrors/linux
C Header | 190 lines | 49 code | 24 blank | 117 comment | 0 complexity | be4f8cf35d6eae8b06175baef1fb6789 MD5 | raw file
  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
 23enum ieee80211_regd_source {
 24	REGD_SOURCE_INTERNAL_DB,
 25	REGD_SOURCE_CRDA,
 26	REGD_SOURCE_CACHED,
 27};
 28
 29extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
 30
 31bool reg_is_valid_request(const char *alpha2);
 32bool is_world_regdom(const char *alpha2);
 33bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region);
 34enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy);
 35
 36int 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 */
 45int 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 */
 51void regulatory_netlink_notify(u32 portid);
 52
 53void wiphy_regulatory_register(struct wiphy *wiphy);
 54void wiphy_regulatory_deregister(struct wiphy *wiphy);
 55
 56int __init regulatory_init(void);
 57void regulatory_exit(void);
 58
 59int set_regdom(const struct ieee80211_regdomain *rd,
 60	       enum ieee80211_regd_source regd_src);
 61
 62unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
 63				   const struct ieee80211_reg_rule *rule);
 64
 65bool reg_last_request_cell_base(void);
 66const 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 */
 86int 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 */
111void 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 disconnected
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 */
132void 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 */
144int cfg80211_get_unii(int freq);
145
146/**
147 * regulatory_indoor_allowed - is indoor operation allowed
148 */
149bool 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_propagate_dfs_state - Propagate DFS channel state to other wiphys
160 * @wiphy - wiphy on which radar is detected and the event will be propagated
161 *	to other available wiphys having the same DFS domain
162 * @chandef - Channel definition of radar detected channel
163 * @dfs_state - DFS channel state to be set
164 * @event - Type of radar event which triggered this DFS state change
165 *
166 * This function should be called with rtnl lock held.
167 */
168void regulatory_propagate_dfs_state(struct wiphy *wiphy,
169				    struct cfg80211_chan_def *chandef,
170				    enum nl80211_dfs_state dfs_state,
171				    enum nl80211_radar_event event);
172
173/**
174 * reg_dfs_domain_same - Checks if both wiphy have same DFS domain configured
175 * @wiphy1 - wiphy it's dfs_region to be checked against that of wiphy2
176 * @wiphy2 - wiphy it's dfs_region to be checked against that of wiphy1
177 */
178bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2);
179
180/**
181 * reg_reload_regdb - reload the regulatory.db firmware file
182 */
183int reg_reload_regdb(void);
184
185extern const u8 shipped_regdb_certs[];
186extern unsigned int shipped_regdb_certs_len;
187extern const u8 extra_regdb_certs[];
188extern unsigned int extra_regdb_certs_len;
189
190#endif  /* __NET_WIRELESS_REG_H */