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
19extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
20
21bool reg_is_valid_request(const char *alpha2);
22bool is_world_regdom(const char *alpha2);
23bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region);
24enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy);
25
26int regulatory_hint_user(const char *alpha2,
27			 enum nl80211_user_reg_hint_type user_reg_hint_type);
28int regulatory_hint_indoor_user(void);
29
30void wiphy_regulatory_register(struct wiphy *wiphy);
31void wiphy_regulatory_deregister(struct wiphy *wiphy);
32
33int __init regulatory_init(void);
34void regulatory_exit(void);
35
36int set_regdom(const struct ieee80211_regdomain *rd);
37unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
38				   const struct ieee80211_reg_rule *rule);
39
40bool reg_last_request_cell_base(void);
41
42/**
43 * regulatory_hint_found_beacon - hints a beacon was found on a channel
44 * @wiphy: the wireless device where the beacon was found on
45 * @beacon_chan: the channel on which the beacon was found on
46 * @gfp: context flags
47 *
48 * This informs the wireless core that a beacon from an AP was found on
49 * the channel provided. This allows the wireless core to make educated
50 * guesses on regulatory to help with world roaming. This is only used for
51 * world roaming -- when we do not know our current location. This is
52 * only useful on channels 12, 13 and 14 on the 2 GHz band as channels
53 * 1-11 are already enabled by the world regulatory domain; and on
54 * non-radar 5 GHz channels.
55 *
56 * Drivers do not need to call this, cfg80211 will do it for after a scan
57 * on a newly found BSS. If you cannot make use of this feature you can
58 * set the wiphy->disable_beacon_hints to true.
59 */
60int regulatory_hint_found_beacon(struct wiphy *wiphy,
61				 struct ieee80211_channel *beacon_chan,
62				 gfp_t gfp);
63
64/**
65 * regulatory_hint_country_ie - hints a country IE as a regulatory domain
66 * @wiphy: the wireless device giving the hint (used only for reporting
67 *	conflicts)
68 * @band: the band on which the country IE was received on. This determines
69 *	the band we'll process the country IE channel triplets for.
70 * @country_ie: pointer to the country IE
71 * @country_ie_len: length of the country IE
72 *
73 * We will intersect the rd with the what CRDA tells us should apply
74 * for the alpha2 this country IE belongs to, this prevents APs from
75 * sending us incorrect or outdated information against a country.
76 *
77 * The AP is expected to provide Country IE channel triplets for the
78 * band it is on. It is technically possible for APs to send channel
79 * country IE triplets even for channels outside of the band they are
80 * in but for that they would have to use the regulatory extension
81 * in combination with a triplet but this behaviour is currently
82 * not observed. For this reason if a triplet is seen with channel
83 * information for a band the BSS is not present in it will be ignored.
84 */
85void regulatory_hint_country_ie(struct wiphy *wiphy,
86			 enum ieee80211_band band,
87			 const u8 *country_ie,
88			 u8 country_ie_len);
89
90/**
91 * regulatory_hint_disconnect - informs all devices have been disconneted
92 *
93 * Regulotory rules can be enhanced further upon scanning and upon
94 * connection to an AP. These rules become stale if we disconnect
95 * and go to another country, whether or not we suspend and resume.
96 * If we suspend, go to another country and resume we'll automatically
97 * get disconnected shortly after resuming and things will be reset as well.
98 * This routine is a helper to restore regulatory settings to how they were
99 * prior to our first connect attempt. This includes ignoring country IE and
100 * beacon regulatory hints. The ieee80211_regdom module parameter will always
101 * be respected but if a user had set the regulatory domain that will take
102 * precedence.
103 *
104 * Must be called from process context.
105 */
106void regulatory_hint_disconnect(void);
107
108/**
109 * cfg80211_get_unii - get the U-NII band for the frequency
110 * @freq: the frequency for which we want to get the UNII band.
111
112 * Get a value specifying the U-NII band frequency belongs to.
113 * U-NII bands are defined by the FCC in C.F.R 47 part 15.
114 *
115 * Returns -EINVAL if freq is invalid, 0 for UNII-1, 1 for UNII-2A,
116 * 2 for UNII-2B, 3 for UNII-2C and 4 for UNII-3.
117 */
118int cfg80211_get_unii(int freq);
119
120/**
121 * regulatory_indoor_allowed - is indoor operation allowed
122 */
123bool regulatory_indoor_allowed(void);
124
125#endif  /* __NET_WIRELESS_REG_H */
126