forked from luck/tmp_suning_uos_patched
88dc1c3f7f
Lets remain consistent and mark rds with > NL80211_MAX_SUPP_REG_RULES number of reg rules as invalid in is_valid_rd(). Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
935 lines
25 KiB
C
935 lines
25 KiB
C
/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/**
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* DOC: Wireless regulatory infrastructure
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*
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* The usual implementation is for a driver to read a device EEPROM to
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* determine which regulatory domain it should be operating under, then
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* looking up the allowable channels in a driver-local table and finally
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* registering those channels in the wiphy structure.
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*
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* Another set of compliance enforcement is for drivers to use their
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* own compliance limits which can be stored on the EEPROM. The host
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* driver or firmware may ensure these are used.
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*
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* In addition to all this we provide an extra layer of regulatory
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* conformance. For drivers which do not have any regulatory
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* information CRDA provides the complete regulatory solution.
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* For others it provides a community effort on further restrictions
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* to enhance compliance.
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*
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* Note: When number of rules --> infinity we will not be able to
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* index on alpha2 any more, instead we'll probably have to
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* rely on some SHA1 checksum of the regdomain for example.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/random.h>
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#include <linux/nl80211.h>
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#include <linux/platform_device.h>
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#include <net/wireless.h>
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#include <net/cfg80211.h>
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#include "core.h"
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#include "reg.h"
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/**
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* struct regulatory_request - receipt of last regulatory request
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*
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* @wiphy: this is set if this request's initiator is
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* %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
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* can be used by the wireless core to deal with conflicts
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* and potentially inform users of which devices specifically
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* cased the conflicts.
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* @initiator: indicates who sent this request, could be any of
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* of those set in reg_set_by, %REGDOM_SET_BY_*
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* @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
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* regulatory domain. We have a few special codes:
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* 00 - World regulatory domain
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* 99 - built by driver but a specific alpha2 cannot be determined
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* 98 - result of an intersection between two regulatory domains
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* @intersect: indicates whether the wireless core should intersect
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* the requested regulatory domain with the presently set regulatory
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* domain.
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*/
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struct regulatory_request {
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struct wiphy *wiphy;
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enum reg_set_by initiator;
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char alpha2[2];
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bool intersect;
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};
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/* Receipt of information from last regulatory request */
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static struct regulatory_request *last_request;
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/* To trigger userspace events */
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static struct platform_device *reg_pdev;
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/* Keep the ordering from large to small */
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static u32 supported_bandwidths[] = {
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MHZ_TO_KHZ(40),
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MHZ_TO_KHZ(20),
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};
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/* Central wireless core regulatory domains, we only need two,
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* the current one and a world regulatory domain in case we have no
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* information to give us an alpha2 */
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static const struct ieee80211_regdomain *cfg80211_regdomain;
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/* We keep a static world regulatory domain in case of the absence of CRDA */
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static const struct ieee80211_regdomain world_regdom = {
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.n_reg_rules = 1,
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.alpha2 = "00",
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.reg_rules = {
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REG_RULE(2412-10, 2462+10, 40, 6, 20,
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NL80211_RRF_PASSIVE_SCAN |
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NL80211_RRF_NO_IBSS),
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}
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};
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static const struct ieee80211_regdomain *cfg80211_world_regdom =
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&world_regdom;
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#ifdef CONFIG_WIRELESS_OLD_REGULATORY
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static char *ieee80211_regdom = "US";
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module_param(ieee80211_regdom, charp, 0444);
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MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
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/* We assume 40 MHz bandwidth for the old regulatory work.
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* We make emphasis we are using the exact same frequencies
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* as before */
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static const struct ieee80211_regdomain us_regdom = {
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.n_reg_rules = 6,
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.alpha2 = "US",
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.reg_rules = {
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/* IEEE 802.11b/g, channels 1..11 */
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REG_RULE(2412-10, 2462+10, 40, 6, 27, 0),
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/* IEEE 802.11a, channel 36 */
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REG_RULE(5180-10, 5180+10, 40, 6, 23, 0),
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/* IEEE 802.11a, channel 40 */
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REG_RULE(5200-10, 5200+10, 40, 6, 23, 0),
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/* IEEE 802.11a, channel 44 */
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REG_RULE(5220-10, 5220+10, 40, 6, 23, 0),
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/* IEEE 802.11a, channels 48..64 */
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REG_RULE(5240-10, 5320+10, 40, 6, 23, 0),
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/* IEEE 802.11a, channels 149..165, outdoor */
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REG_RULE(5745-10, 5825+10, 40, 6, 30, 0),
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}
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};
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static const struct ieee80211_regdomain jp_regdom = {
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.n_reg_rules = 3,
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.alpha2 = "JP",
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.reg_rules = {
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/* IEEE 802.11b/g, channels 1..14 */
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REG_RULE(2412-10, 2484+10, 40, 6, 20, 0),
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/* IEEE 802.11a, channels 34..48 */
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REG_RULE(5170-10, 5240+10, 40, 6, 20,
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NL80211_RRF_PASSIVE_SCAN),
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/* IEEE 802.11a, channels 52..64 */
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REG_RULE(5260-10, 5320+10, 40, 6, 20,
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NL80211_RRF_NO_IBSS |
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NL80211_RRF_DFS),
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}
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};
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static const struct ieee80211_regdomain eu_regdom = {
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.n_reg_rules = 6,
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/* This alpha2 is bogus, we leave it here just for stupid
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* backward compatibility */
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.alpha2 = "EU",
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.reg_rules = {
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/* IEEE 802.11b/g, channels 1..13 */
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REG_RULE(2412-10, 2472+10, 40, 6, 20, 0),
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/* IEEE 802.11a, channel 36 */
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REG_RULE(5180-10, 5180+10, 40, 6, 23,
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NL80211_RRF_PASSIVE_SCAN),
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/* IEEE 802.11a, channel 40 */
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REG_RULE(5200-10, 5200+10, 40, 6, 23,
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NL80211_RRF_PASSIVE_SCAN),
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/* IEEE 802.11a, channel 44 */
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REG_RULE(5220-10, 5220+10, 40, 6, 23,
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NL80211_RRF_PASSIVE_SCAN),
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/* IEEE 802.11a, channels 48..64 */
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REG_RULE(5240-10, 5320+10, 40, 6, 20,
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NL80211_RRF_NO_IBSS |
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NL80211_RRF_DFS),
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/* IEEE 802.11a, channels 100..140 */
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REG_RULE(5500-10, 5700+10, 40, 6, 30,
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NL80211_RRF_NO_IBSS |
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NL80211_RRF_DFS),
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}
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};
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static const struct ieee80211_regdomain *static_regdom(char *alpha2)
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{
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if (alpha2[0] == 'U' && alpha2[1] == 'S')
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return &us_regdom;
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if (alpha2[0] == 'J' && alpha2[1] == 'P')
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return &jp_regdom;
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if (alpha2[0] == 'E' && alpha2[1] == 'U')
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return &eu_regdom;
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/* Default, as per the old rules */
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return &us_regdom;
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}
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static bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
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{
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if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom)
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return true;
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return false;
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}
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#else
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static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
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{
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return false;
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}
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#endif
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static void reset_regdomains(void)
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{
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/* avoid freeing static information or freeing something twice */
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if (cfg80211_regdomain == cfg80211_world_regdom)
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cfg80211_regdomain = NULL;
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if (cfg80211_world_regdom == &world_regdom)
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cfg80211_world_regdom = NULL;
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if (cfg80211_regdomain == &world_regdom)
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cfg80211_regdomain = NULL;
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if (is_old_static_regdom(cfg80211_regdomain))
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cfg80211_regdomain = NULL;
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kfree(cfg80211_regdomain);
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kfree(cfg80211_world_regdom);
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cfg80211_world_regdom = &world_regdom;
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cfg80211_regdomain = NULL;
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}
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/* Dynamic world regulatory domain requested by the wireless
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* core upon initialization */
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static void update_world_regdomain(const struct ieee80211_regdomain *rd)
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{
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BUG_ON(!last_request);
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reset_regdomains();
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cfg80211_world_regdom = rd;
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cfg80211_regdomain = rd;
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}
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bool is_world_regdom(const char *alpha2)
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{
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if (!alpha2)
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return false;
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if (alpha2[0] == '0' && alpha2[1] == '0')
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return true;
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return false;
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}
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static bool is_alpha2_set(const char *alpha2)
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{
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if (!alpha2)
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return false;
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if (alpha2[0] != 0 && alpha2[1] != 0)
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return true;
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return false;
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}
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static bool is_alpha_upper(char letter)
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{
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/* ASCII A - Z */
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if (letter >= 65 && letter <= 90)
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return true;
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return false;
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}
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static bool is_unknown_alpha2(const char *alpha2)
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{
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if (!alpha2)
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return false;
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/* Special case where regulatory domain was built by driver
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* but a specific alpha2 cannot be determined */
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if (alpha2[0] == '9' && alpha2[1] == '9')
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return true;
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return false;
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}
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static bool is_an_alpha2(const char *alpha2)
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{
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if (!alpha2)
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return false;
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if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1]))
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return true;
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return false;
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}
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static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
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{
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if (!alpha2_x || !alpha2_y)
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return false;
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if (alpha2_x[0] == alpha2_y[0] &&
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alpha2_x[1] == alpha2_y[1])
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return true;
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return false;
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}
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static bool regdom_changed(const char *alpha2)
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{
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if (!cfg80211_regdomain)
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return true;
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if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
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return false;
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return true;
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}
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/* This lets us keep regulatory code which is updated on a regulatory
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* basis in userspace. */
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static int call_crda(const char *alpha2)
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{
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char country_env[9 + 2] = "COUNTRY=";
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char *envp[] = {
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country_env,
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NULL
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};
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if (!is_world_regdom((char *) alpha2))
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printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n",
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alpha2[0], alpha2[1]);
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else
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printk(KERN_INFO "cfg80211: Calling CRDA to update world "
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"regulatory domain\n");
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country_env[8] = alpha2[0];
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country_env[9] = alpha2[1];
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return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp);
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}
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/* Used by nl80211 before kmalloc'ing our regulatory domain */
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bool reg_is_valid_request(const char *alpha2)
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{
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if (!last_request)
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return false;
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return alpha2_equal(last_request->alpha2, alpha2);
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}
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/* Sanity check on a regulatory rule */
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static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
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{
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const struct ieee80211_freq_range *freq_range = &rule->freq_range;
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u32 freq_diff;
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if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
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return false;
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if (freq_range->start_freq_khz > freq_range->end_freq_khz)
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return false;
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freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
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if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff)
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return false;
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return true;
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}
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static bool is_valid_rd(const struct ieee80211_regdomain *rd)
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{
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const struct ieee80211_reg_rule *reg_rule = NULL;
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unsigned int i;
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if (!rd->n_reg_rules)
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return false;
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if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
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return false;
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for (i = 0; i < rd->n_reg_rules; i++) {
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reg_rule = &rd->reg_rules[i];
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if (!is_valid_reg_rule(reg_rule))
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return false;
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}
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return true;
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}
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/* Returns value in KHz */
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static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range,
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u32 freq)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) {
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u32 start_freq_khz = freq - supported_bandwidths[i]/2;
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u32 end_freq_khz = freq + supported_bandwidths[i]/2;
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if (start_freq_khz >= freq_range->start_freq_khz &&
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end_freq_khz <= freq_range->end_freq_khz)
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return supported_bandwidths[i];
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}
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return 0;
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}
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/* Helper for regdom_intersect(), this does the real
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* mathematical intersection fun */
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static int reg_rules_intersect(
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const struct ieee80211_reg_rule *rule1,
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const struct ieee80211_reg_rule *rule2,
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struct ieee80211_reg_rule *intersected_rule)
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{
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const struct ieee80211_freq_range *freq_range1, *freq_range2;
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struct ieee80211_freq_range *freq_range;
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const struct ieee80211_power_rule *power_rule1, *power_rule2;
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struct ieee80211_power_rule *power_rule;
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u32 freq_diff;
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freq_range1 = &rule1->freq_range;
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freq_range2 = &rule2->freq_range;
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freq_range = &intersected_rule->freq_range;
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power_rule1 = &rule1->power_rule;
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power_rule2 = &rule2->power_rule;
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power_rule = &intersected_rule->power_rule;
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freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
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freq_range2->start_freq_khz);
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freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
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freq_range2->end_freq_khz);
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freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
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freq_range2->max_bandwidth_khz);
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freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
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if (freq_range->max_bandwidth_khz > freq_diff)
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freq_range->max_bandwidth_khz = freq_diff;
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power_rule->max_eirp = min(power_rule1->max_eirp,
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power_rule2->max_eirp);
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power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
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power_rule2->max_antenna_gain);
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intersected_rule->flags = (rule1->flags | rule2->flags);
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if (!is_valid_reg_rule(intersected_rule))
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return -EINVAL;
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return 0;
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}
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/**
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* regdom_intersect - do the intersection between two regulatory domains
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* @rd1: first regulatory domain
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* @rd2: second regulatory domain
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*
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* Use this function to get the intersection between two regulatory domains.
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* Once completed we will mark the alpha2 for the rd as intersected, "98",
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* as no one single alpha2 can represent this regulatory domain.
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*
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* Returns a pointer to the regulatory domain structure which will hold the
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* resulting intersection of rules between rd1 and rd2. We will
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* kzalloc() this structure for you.
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*/
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static struct ieee80211_regdomain *regdom_intersect(
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const struct ieee80211_regdomain *rd1,
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const struct ieee80211_regdomain *rd2)
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{
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int r, size_of_regd;
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unsigned int x, y;
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unsigned int num_rules = 0, rule_idx = 0;
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const struct ieee80211_reg_rule *rule1, *rule2;
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struct ieee80211_reg_rule *intersected_rule;
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struct ieee80211_regdomain *rd;
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/* This is just a dummy holder to help us count */
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struct ieee80211_reg_rule irule;
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/* Uses the stack temporarily for counter arithmetic */
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intersected_rule = &irule;
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memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule));
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if (!rd1 || !rd2)
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return NULL;
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/* First we get a count of the rules we'll need, then we actually
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* build them. This is to so we can malloc() and free() a
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* regdomain once. The reason we use reg_rules_intersect() here
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* is it will return -EINVAL if the rule computed makes no sense.
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* All rules that do check out OK are valid. */
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for (x = 0; x < rd1->n_reg_rules; x++) {
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rule1 = &rd1->reg_rules[x];
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for (y = 0; y < rd2->n_reg_rules; y++) {
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rule2 = &rd2->reg_rules[y];
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if (!reg_rules_intersect(rule1, rule2,
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intersected_rule))
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num_rules++;
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memset(intersected_rule, 0,
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sizeof(struct ieee80211_reg_rule));
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}
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}
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if (!num_rules)
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return NULL;
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|
|
size_of_regd = sizeof(struct ieee80211_regdomain) +
|
|
((num_rules + 1) * sizeof(struct ieee80211_reg_rule));
|
|
|
|
rd = kzalloc(size_of_regd, GFP_KERNEL);
|
|
if (!rd)
|
|
return NULL;
|
|
|
|
for (x = 0; x < rd1->n_reg_rules; x++) {
|
|
rule1 = &rd1->reg_rules[x];
|
|
for (y = 0; y < rd2->n_reg_rules; y++) {
|
|
rule2 = &rd2->reg_rules[y];
|
|
/* This time around instead of using the stack lets
|
|
* write to the target rule directly saving ourselves
|
|
* a memcpy() */
|
|
intersected_rule = &rd->reg_rules[rule_idx];
|
|
r = reg_rules_intersect(rule1, rule2,
|
|
intersected_rule);
|
|
/* No need to memset here the intersected rule here as
|
|
* we're not using the stack anymore */
|
|
if (r)
|
|
continue;
|
|
rule_idx++;
|
|
}
|
|
}
|
|
|
|
if (rule_idx != num_rules) {
|
|
kfree(rd);
|
|
return NULL;
|
|
}
|
|
|
|
rd->n_reg_rules = num_rules;
|
|
rd->alpha2[0] = '9';
|
|
rd->alpha2[1] = '8';
|
|
|
|
return rd;
|
|
}
|
|
|
|
/* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
|
|
* want to just have the channel structure use these */
|
|
static u32 map_regdom_flags(u32 rd_flags)
|
|
{
|
|
u32 channel_flags = 0;
|
|
if (rd_flags & NL80211_RRF_PASSIVE_SCAN)
|
|
channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN;
|
|
if (rd_flags & NL80211_RRF_NO_IBSS)
|
|
channel_flags |= IEEE80211_CHAN_NO_IBSS;
|
|
if (rd_flags & NL80211_RRF_DFS)
|
|
channel_flags |= IEEE80211_CHAN_RADAR;
|
|
return channel_flags;
|
|
}
|
|
|
|
/**
|
|
* freq_reg_info - get regulatory information for the given frequency
|
|
* @center_freq: Frequency in KHz for which we want regulatory information for
|
|
* @bandwidth: the bandwidth requirement you have in KHz, if you do not have one
|
|
* you can set this to 0. If this frequency is allowed we then set
|
|
* this value to the maximum allowed bandwidth.
|
|
* @reg_rule: the regulatory rule which we have for this frequency
|
|
*
|
|
* Use this function to get the regulatory rule for a specific frequency.
|
|
*/
|
|
static int freq_reg_info(u32 center_freq, u32 *bandwidth,
|
|
const struct ieee80211_reg_rule **reg_rule)
|
|
{
|
|
int i;
|
|
u32 max_bandwidth = 0;
|
|
|
|
if (!cfg80211_regdomain)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
|
|
const struct ieee80211_reg_rule *rr;
|
|
const struct ieee80211_freq_range *fr = NULL;
|
|
const struct ieee80211_power_rule *pr = NULL;
|
|
|
|
rr = &cfg80211_regdomain->reg_rules[i];
|
|
fr = &rr->freq_range;
|
|
pr = &rr->power_rule;
|
|
max_bandwidth = freq_max_bandwidth(fr, center_freq);
|
|
if (max_bandwidth && *bandwidth <= max_bandwidth) {
|
|
*reg_rule = rr;
|
|
*bandwidth = max_bandwidth;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return !max_bandwidth;
|
|
}
|
|
|
|
static void handle_channel(struct ieee80211_channel *chan)
|
|
{
|
|
int r;
|
|
u32 flags = chan->orig_flags;
|
|
u32 max_bandwidth = 0;
|
|
const struct ieee80211_reg_rule *reg_rule = NULL;
|
|
const struct ieee80211_power_rule *power_rule = NULL;
|
|
|
|
r = freq_reg_info(MHZ_TO_KHZ(chan->center_freq),
|
|
&max_bandwidth, ®_rule);
|
|
|
|
if (r) {
|
|
flags |= IEEE80211_CHAN_DISABLED;
|
|
chan->flags = flags;
|
|
return;
|
|
}
|
|
|
|
power_rule = ®_rule->power_rule;
|
|
|
|
chan->flags = flags | map_regdom_flags(reg_rule->flags);
|
|
chan->max_antenna_gain = min(chan->orig_mag,
|
|
(int) MBI_TO_DBI(power_rule->max_antenna_gain));
|
|
chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
|
|
if (chan->orig_mpwr)
|
|
chan->max_power = min(chan->orig_mpwr,
|
|
(int) MBM_TO_DBM(power_rule->max_eirp));
|
|
else
|
|
chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
|
|
}
|
|
|
|
static void handle_band(struct ieee80211_supported_band *sband)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sband->n_channels; i++)
|
|
handle_channel(&sband->channels[i]);
|
|
}
|
|
|
|
static void update_all_wiphy_regulatory(enum reg_set_by setby)
|
|
{
|
|
struct cfg80211_registered_device *drv;
|
|
|
|
list_for_each_entry(drv, &cfg80211_drv_list, list)
|
|
wiphy_update_regulatory(&drv->wiphy, setby);
|
|
}
|
|
|
|
void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby)
|
|
{
|
|
enum ieee80211_band band;
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
|
|
if (wiphy->bands[band])
|
|
handle_band(wiphy->bands[band]);
|
|
if (wiphy->reg_notifier)
|
|
wiphy->reg_notifier(wiphy, setby);
|
|
}
|
|
}
|
|
|
|
/* Return value which can be used by ignore_request() to indicate
|
|
* it has been determined we should intersect two regulatory domains */
|
|
#define REG_INTERSECT 1
|
|
|
|
/* This has the logic which determines when a new request
|
|
* should be ignored. */
|
|
static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
|
|
const char *alpha2)
|
|
{
|
|
/* All initial requests are respected */
|
|
if (!last_request)
|
|
return 0;
|
|
|
|
switch (set_by) {
|
|
case REGDOM_SET_BY_INIT:
|
|
return -EINVAL;
|
|
case REGDOM_SET_BY_CORE:
|
|
/*
|
|
* Always respect new wireless core hints, should only happen
|
|
* when updating the world regulatory domain at init.
|
|
*/
|
|
return 0;
|
|
case REGDOM_SET_BY_COUNTRY_IE:
|
|
if (unlikely(!is_an_alpha2(alpha2)))
|
|
return -EINVAL;
|
|
if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) {
|
|
if (last_request->wiphy != wiphy) {
|
|
/*
|
|
* Two cards with two APs claiming different
|
|
* different Country IE alpha2s. We could
|
|
* intersect them, but that seems unlikely
|
|
* to be correct. Reject second one for now.
|
|
*/
|
|
if (!alpha2_equal(alpha2,
|
|
cfg80211_regdomain->alpha2))
|
|
return -EOPNOTSUPP;
|
|
return -EALREADY;
|
|
}
|
|
/* Two consecutive Country IE hints on the same wiphy */
|
|
if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
|
|
return 0;
|
|
return -EALREADY;
|
|
}
|
|
/*
|
|
* Ignore Country IE hints for now, need to think about
|
|
* what we need to do to support multi-domain operation.
|
|
*/
|
|
return -EOPNOTSUPP;
|
|
case REGDOM_SET_BY_DRIVER:
|
|
if (last_request->initiator == REGDOM_SET_BY_DRIVER)
|
|
return -EALREADY;
|
|
return 0;
|
|
case REGDOM_SET_BY_USER:
|
|
if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
|
|
return REG_INTERSECT;
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Caller must hold &cfg80211_drv_mutex */
|
|
int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
|
|
const char *alpha2)
|
|
{
|
|
struct regulatory_request *request;
|
|
bool intersect = false;
|
|
int r = 0;
|
|
|
|
r = ignore_request(wiphy, set_by, alpha2);
|
|
|
|
if (r == REG_INTERSECT)
|
|
intersect = true;
|
|
else if (r)
|
|
return r;
|
|
|
|
request = kzalloc(sizeof(struct regulatory_request),
|
|
GFP_KERNEL);
|
|
if (!request)
|
|
return -ENOMEM;
|
|
|
|
request->alpha2[0] = alpha2[0];
|
|
request->alpha2[1] = alpha2[1];
|
|
request->initiator = set_by;
|
|
request->wiphy = wiphy;
|
|
request->intersect = intersect;
|
|
|
|
kfree(last_request);
|
|
last_request = request;
|
|
return call_crda(alpha2);
|
|
}
|
|
|
|
void regulatory_hint(struct wiphy *wiphy, const char *alpha2)
|
|
{
|
|
BUG_ON(!alpha2);
|
|
|
|
mutex_lock(&cfg80211_drv_mutex);
|
|
__regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2);
|
|
mutex_unlock(&cfg80211_drv_mutex);
|
|
}
|
|
EXPORT_SYMBOL(regulatory_hint);
|
|
|
|
|
|
static void print_rd_rules(const struct ieee80211_regdomain *rd)
|
|
{
|
|
unsigned int i;
|
|
const struct ieee80211_reg_rule *reg_rule = NULL;
|
|
const struct ieee80211_freq_range *freq_range = NULL;
|
|
const struct ieee80211_power_rule *power_rule = NULL;
|
|
|
|
printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), "
|
|
"(max_antenna_gain, max_eirp)\n");
|
|
|
|
for (i = 0; i < rd->n_reg_rules; i++) {
|
|
reg_rule = &rd->reg_rules[i];
|
|
freq_range = ®_rule->freq_range;
|
|
power_rule = ®_rule->power_rule;
|
|
|
|
/* There may not be documentation for max antenna gain
|
|
* in certain regions */
|
|
if (power_rule->max_antenna_gain)
|
|
printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
|
|
"(%d mBi, %d mBm)\n",
|
|
freq_range->start_freq_khz,
|
|
freq_range->end_freq_khz,
|
|
freq_range->max_bandwidth_khz,
|
|
power_rule->max_antenna_gain,
|
|
power_rule->max_eirp);
|
|
else
|
|
printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
|
|
"(N/A, %d mBm)\n",
|
|
freq_range->start_freq_khz,
|
|
freq_range->end_freq_khz,
|
|
freq_range->max_bandwidth_khz,
|
|
power_rule->max_eirp);
|
|
}
|
|
}
|
|
|
|
static void print_regdomain(const struct ieee80211_regdomain *rd)
|
|
{
|
|
|
|
if (is_world_regdom(rd->alpha2))
|
|
printk(KERN_INFO "cfg80211: World regulatory "
|
|
"domain updated:\n");
|
|
else {
|
|
if (is_unknown_alpha2(rd->alpha2))
|
|
printk(KERN_INFO "cfg80211: Regulatory domain "
|
|
"changed to driver built-in settings "
|
|
"(unknown country)\n");
|
|
else
|
|
printk(KERN_INFO "cfg80211: Regulatory domain "
|
|
"changed to country: %c%c\n",
|
|
rd->alpha2[0], rd->alpha2[1]);
|
|
}
|
|
print_rd_rules(rd);
|
|
}
|
|
|
|
static void print_regdomain_info(const struct ieee80211_regdomain *rd)
|
|
{
|
|
printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n",
|
|
rd->alpha2[0], rd->alpha2[1]);
|
|
print_rd_rules(rd);
|
|
}
|
|
|
|
/* Takes ownership of rd only if it doesn't fail */
|
|
static int __set_regdom(const struct ieee80211_regdomain *rd)
|
|
{
|
|
const struct ieee80211_regdomain *intersected_rd = NULL;
|
|
/* Some basic sanity checks first */
|
|
|
|
if (is_world_regdom(rd->alpha2)) {
|
|
if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
|
|
return -EINVAL;
|
|
update_world_regdomain(rd);
|
|
return 0;
|
|
}
|
|
|
|
if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
|
|
!is_unknown_alpha2(rd->alpha2))
|
|
return -EINVAL;
|
|
|
|
if (!last_request)
|
|
return -EINVAL;
|
|
|
|
/* allow overriding the static definitions if CRDA is present */
|
|
if (!is_old_static_regdom(cfg80211_regdomain) &&
|
|
!regdom_changed(rd->alpha2))
|
|
return -EINVAL;
|
|
|
|
/* Now lets set the regulatory domain, update all driver channels
|
|
* and finally inform them of what we have done, in case they want
|
|
* to review or adjust their own settings based on their own
|
|
* internal EEPROM data */
|
|
|
|
if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
|
|
return -EINVAL;
|
|
|
|
if (!is_valid_rd(rd)) {
|
|
printk(KERN_ERR "cfg80211: Invalid "
|
|
"regulatory domain detected:\n");
|
|
print_regdomain_info(rd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!last_request->intersect) {
|
|
reset_regdomains();
|
|
cfg80211_regdomain = rd;
|
|
return 0;
|
|
}
|
|
|
|
/* Intersection requires a bit more work */
|
|
|
|
if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) {
|
|
|
|
intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
|
|
if (!intersected_rd)
|
|
return -EINVAL;
|
|
|
|
/* We can trash what CRDA provided now */
|
|
kfree(rd);
|
|
rd = NULL;
|
|
|
|
reset_regdomains();
|
|
cfg80211_regdomain = intersected_rd;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Country IE parsing coming soon */
|
|
reset_regdomains();
|
|
WARN_ON(1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Use this call to set the current regulatory domain. Conflicts with
|
|
* multiple drivers can be ironed out later. Caller must've already
|
|
* kmalloc'd the rd structure. Caller must hold cfg80211_drv_mutex */
|
|
int set_regdom(const struct ieee80211_regdomain *rd)
|
|
{
|
|
int r;
|
|
|
|
/* Note that this doesn't update the wiphys, this is done below */
|
|
r = __set_regdom(rd);
|
|
if (r) {
|
|
kfree(rd);
|
|
return r;
|
|
}
|
|
|
|
/* This would make this whole thing pointless */
|
|
if (!last_request->intersect)
|
|
BUG_ON(rd != cfg80211_regdomain);
|
|
|
|
/* update all wiphys now with the new established regulatory domain */
|
|
update_all_wiphy_regulatory(last_request->initiator);
|
|
|
|
print_regdomain(cfg80211_regdomain);
|
|
|
|
return r;
|
|
}
|
|
|
|
int regulatory_init(void)
|
|
{
|
|
int err;
|
|
|
|
reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
|
|
if (IS_ERR(reg_pdev))
|
|
return PTR_ERR(reg_pdev);
|
|
|
|
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
|
|
cfg80211_regdomain = static_regdom(ieee80211_regdom);
|
|
|
|
printk(KERN_INFO "cfg80211: Using static regulatory domain info\n");
|
|
print_regdomain_info(cfg80211_regdomain);
|
|
/* The old code still requests for a new regdomain and if
|
|
* you have CRDA you get it updated, otherwise you get
|
|
* stuck with the static values. We ignore "EU" code as
|
|
* that is not a valid ISO / IEC 3166 alpha2 */
|
|
if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U')
|
|
err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE,
|
|
ieee80211_regdom);
|
|
#else
|
|
cfg80211_regdomain = cfg80211_world_regdom;
|
|
|
|
err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00");
|
|
if (err)
|
|
printk(KERN_ERR "cfg80211: calling CRDA failed - "
|
|
"unable to update world regulatory domain, "
|
|
"using static definition\n");
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
void regulatory_exit(void)
|
|
{
|
|
mutex_lock(&cfg80211_drv_mutex);
|
|
|
|
reset_regdomains();
|
|
|
|
kfree(last_request);
|
|
|
|
platform_device_unregister(reg_pdev);
|
|
|
|
mutex_unlock(&cfg80211_drv_mutex);
|
|
}
|