![Johannes Berg](/assets/img/avatar_default.png)
The statically defined regdomains are used in a very convoluted way, use them instead to prime the information we have and then continue operating normally. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
873 lines
23 KiB
C
873 lines
23 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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/* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */
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struct regulatory_request {
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struct list_head list;
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struct wiphy *wiphy;
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int granted;
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enum reg_set_by initiator;
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char alpha2[2];
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};
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static LIST_HEAD(regulatory_requests);
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DEFINE_MUTEX(cfg80211_reg_mutex);
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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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static struct list_head regulatory_requests;
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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(list_empty(®ulatory_requests));
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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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/* This has the logic which determines when a new request
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* should be ignored. */
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static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
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char *alpha2, struct ieee80211_regdomain *rd)
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{
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struct regulatory_request *last_request = NULL;
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/* All initial requests are respected */
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if (list_empty(®ulatory_requests))
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return 0;
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last_request = list_first_entry(®ulatory_requests,
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struct regulatory_request, list);
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switch (set_by) {
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case REGDOM_SET_BY_INIT:
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return -EINVAL;
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case REGDOM_SET_BY_CORE:
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/* Always respect new wireless core hints, should only
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* come in for updating the world regulatory domain at init
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* anyway */
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return 0;
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case REGDOM_SET_BY_COUNTRY_IE:
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if (last_request->initiator == set_by) {
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if (last_request->wiphy != wiphy) {
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/* Two cards with two APs claiming different
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* different Country IE alpha2s!
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* You're special!! */
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if (!alpha2_equal(last_request->alpha2,
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cfg80211_regdomain->alpha2)) {
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/* XXX: Deal with conflict, consider
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* building a new one out of the
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* intersection */
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WARN_ON(1);
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return -EOPNOTSUPP;
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}
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return -EALREADY;
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}
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/* Two consecutive Country IE hints on the same wiphy */
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if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
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return 0;
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return -EALREADY;
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}
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if (WARN_ON(!is_alpha2_set(alpha2) || !is_an_alpha2(alpha2)),
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"Invalid Country IE regulatory hint passed "
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"to the wireless core\n")
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return -EINVAL;
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/* We ignore Country IE hints for now, as we haven't yet
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* added the dot11MultiDomainCapabilityEnabled flag
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* for wiphys */
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return 1;
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case REGDOM_SET_BY_DRIVER:
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BUG_ON(!wiphy);
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if (last_request->initiator == set_by) {
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/* Two separate drivers hinting different things,
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* this is possible if you have two devices present
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* on a system with different EEPROM regulatory
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* readings. XXX: Do intersection, we support only
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* the first regulatory hint for now */
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if (last_request->wiphy != wiphy)
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return -EALREADY;
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if (rd)
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return -EALREADY;
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/* Driver should not be trying to hint different
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* regulatory domains! */
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BUG_ON(!alpha2_equal(alpha2,
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cfg80211_regdomain->alpha2));
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return -EALREADY;
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}
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if (last_request->initiator == REGDOM_SET_BY_CORE)
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return 0;
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/* XXX: Handle intersection, and add the
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* dot11MultiDomainCapabilityEnabled flag to wiphy. For now
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* we assume the driver has this set to false, following the
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* 802.11d dot11MultiDomainCapabilityEnabled documentation */
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if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
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return 0;
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return 0;
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case REGDOM_SET_BY_USER:
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if (last_request->initiator == set_by ||
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last_request->initiator == REGDOM_SET_BY_CORE)
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return 0;
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/* Drivers can use their wiphy's reg_notifier()
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* to override any information */
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if (last_request->initiator == REGDOM_SET_BY_DRIVER)
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return 0;
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/* XXX: Handle intersection */
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if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
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return -EOPNOTSUPP;
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return 0;
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default:
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return -EINVAL;
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}
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}
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static bool __reg_is_valid_request(const char *alpha2,
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struct regulatory_request **request)
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{
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struct regulatory_request *req;
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if (list_empty(®ulatory_requests))
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return false;
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list_for_each_entry(req, ®ulatory_requests, list) {
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if (alpha2_equal(req->alpha2, alpha2)) {
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*request = req;
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return true;
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}
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}
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return false;
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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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struct regulatory_request *request = NULL;
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return __reg_is_valid_request(alpha2, &request);
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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_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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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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/* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
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* want to just have the channel structure use these */
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static u32 map_regdom_flags(u32 rd_flags)
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{
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u32 channel_flags = 0;
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if (rd_flags & NL80211_RRF_PASSIVE_SCAN)
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channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN;
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if (rd_flags & NL80211_RRF_NO_IBSS)
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channel_flags |= IEEE80211_CHAN_NO_IBSS;
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if (rd_flags & NL80211_RRF_DFS)
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channel_flags |= IEEE80211_CHAN_RADAR;
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return channel_flags;
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}
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/**
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* freq_reg_info - get regulatory information for the given frequency
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* @center_freq: Frequency in KHz for which we want regulatory information for
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* @bandwidth: the bandwidth requirement you have in KHz, if you do not have one
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* you can set this to 0. If this frequency is allowed we then set
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* this value to the maximum allowed bandwidth.
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* @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);
|
|
}
|
|
}
|
|
|
|
/* Caller must hold &cfg80211_drv_mutex */
|
|
int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
|
|
const char *alpha2, struct ieee80211_regdomain *rd)
|
|
{
|
|
struct regulatory_request *request;
|
|
char *rd_alpha2;
|
|
int r = 0;
|
|
|
|
r = ignore_request(wiphy, set_by, (char *) alpha2, rd);
|
|
if (r)
|
|
return r;
|
|
|
|
if (rd)
|
|
rd_alpha2 = rd->alpha2;
|
|
else
|
|
rd_alpha2 = (char *) alpha2;
|
|
|
|
switch (set_by) {
|
|
case REGDOM_SET_BY_CORE:
|
|
case REGDOM_SET_BY_COUNTRY_IE:
|
|
case REGDOM_SET_BY_DRIVER:
|
|
case REGDOM_SET_BY_USER:
|
|
request = kzalloc(sizeof(struct regulatory_request),
|
|
GFP_KERNEL);
|
|
if (!request)
|
|
return -ENOMEM;
|
|
|
|
request->alpha2[0] = rd_alpha2[0];
|
|
request->alpha2[1] = rd_alpha2[1];
|
|
request->initiator = set_by;
|
|
request->wiphy = wiphy;
|
|
|
|
list_add_tail(&request->list, ®ulatory_requests);
|
|
if (rd)
|
|
break;
|
|
r = call_crda(alpha2);
|
|
#ifndef CONFIG_WIRELESS_OLD_REGULATORY
|
|
if (r)
|
|
printk(KERN_ERR "cfg80211: Failed calling CRDA\n");
|
|
#endif
|
|
break;
|
|
default:
|
|
r = -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* If rd is not NULL and if this call fails the caller must free it */
|
|
int regulatory_hint(struct wiphy *wiphy, const char *alpha2,
|
|
struct ieee80211_regdomain *rd)
|
|
{
|
|
int r;
|
|
BUG_ON(!rd && !alpha2);
|
|
|
|
mutex_lock(&cfg80211_drv_mutex);
|
|
|
|
r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, rd);
|
|
if (r || !rd)
|
|
goto unlock_and_exit;
|
|
|
|
/* If the driver passed a regulatory domain we skipped asking
|
|
* userspace for one so we can now go ahead and set it */
|
|
r = set_regdom(rd);
|
|
|
|
unlock_and_exit:
|
|
mutex_unlock(&cfg80211_drv_mutex);
|
|
return r;
|
|
}
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static int __set_regdom(const struct ieee80211_regdomain *rd)
|
|
{
|
|
struct regulatory_request *request = NULL;
|
|
|
|
/* Some basic sanity checks first */
|
|
|
|
if (is_world_regdom(rd->alpha2)) {
|
|
if (WARN_ON(!__reg_is_valid_request(rd->alpha2, &request)))
|
|
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 (list_empty(®ulatory_requests))
|
|
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, &request)))
|
|
return -EINVAL;
|
|
|
|
reset_regdomains();
|
|
|
|
/* Country IE parsing coming soon */
|
|
switch (request->initiator) {
|
|
case REGDOM_SET_BY_CORE:
|
|
case REGDOM_SET_BY_DRIVER:
|
|
case REGDOM_SET_BY_USER:
|
|
if (!is_valid_rd(rd)) {
|
|
printk(KERN_ERR "cfg80211: Invalid "
|
|
"regulatory domain detected:\n");
|
|
print_regdomain_info(rd);
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
case REGDOM_SET_BY_COUNTRY_IE: /* Not yet */
|
|
WARN_ON(1);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/* Tada! */
|
|
cfg80211_regdomain = rd;
|
|
request->granted = 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. If this calls fails you should kfree()
|
|
* the passed rd. Caller must hold cfg80211_drv_mutex */
|
|
int set_regdom(const struct ieee80211_regdomain *rd)
|
|
{
|
|
struct regulatory_request *this_request = NULL, *prev_request = NULL;
|
|
int r;
|
|
|
|
if (!list_empty(®ulatory_requests))
|
|
prev_request = list_first_entry(®ulatory_requests,
|
|
struct regulatory_request, list);
|
|
|
|
/* Note that this doesn't update the wiphys, this is done below */
|
|
r = __set_regdom(rd);
|
|
if (r)
|
|
return r;
|
|
|
|
BUG_ON((!__reg_is_valid_request(rd->alpha2, &this_request)));
|
|
|
|
/* The initial standard core update of the world regulatory domain, no
|
|
* need to keep that request info around if it didn't fail. */
|
|
if (is_world_regdom(rd->alpha2) &&
|
|
this_request->initiator == REGDOM_SET_BY_CORE &&
|
|
this_request->granted) {
|
|
list_del(&this_request->list);
|
|
kfree(this_request);
|
|
this_request = NULL;
|
|
}
|
|
|
|
/* Remove old requests, we only leave behind the last one */
|
|
if (prev_request) {
|
|
list_del(&prev_request->list);
|
|
kfree(prev_request);
|
|
prev_request = NULL;
|
|
}
|
|
|
|
/* This would make this whole thing pointless */
|
|
BUG_ON(rd != cfg80211_regdomain);
|
|
|
|
/* update all wiphys now with the new established regulatory domain */
|
|
update_all_wiphy_regulatory(this_request->initiator);
|
|
|
|
print_regdomain(rd);
|
|
|
|
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, NULL);
|
|
#else
|
|
cfg80211_regdomain = cfg80211_world_regdom;
|
|
|
|
err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL);
|
|
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)
|
|
{
|
|
struct regulatory_request *req, *req_tmp;
|
|
|
|
mutex_lock(&cfg80211_drv_mutex);
|
|
|
|
reset_regdomains();
|
|
|
|
list_for_each_entry_safe(req, req_tmp, ®ulatory_requests, list) {
|
|
list_del(&req->list);
|
|
kfree(req);
|
|
}
|
|
platform_device_unregister(reg_pdev);
|
|
|
|
mutex_unlock(&cfg80211_drv_mutex);
|
|
}
|