mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
4354 lines
113 KiB
4354 lines
113 KiB
/* |
|
* Copyright 2002-2005, Instant802 Networks, Inc. |
|
* Copyright 2005-2006, Devicescape Software, Inc. |
|
* Copyright 2007 Johannes Berg <[email protected]> |
|
* Copyright 2008-2011 Luis R. Rodriguez <[email protected]> |
|
* Copyright 2013-2014 Intel Mobile Communications GmbH |
|
* Copyright 2017 Intel Deutschland GmbH |
|
* Copyright (C) 2018 - 2021 Intel Corporation |
|
* |
|
* Permission to use, copy, modify, and/or distribute this software for any |
|
* purpose with or without fee is hereby granted, provided that the above |
|
* copyright notice and this permission notice appear in all copies. |
|
* |
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
|
*/ |
|
|
|
|
|
/** |
|
* DOC: Wireless regulatory infrastructure |
|
* |
|
* The usual implementation is for a driver to read a device EEPROM to |
|
* determine which regulatory domain it should be operating under, then |
|
* looking up the allowable channels in a driver-local table and finally |
|
* registering those channels in the wiphy structure. |
|
* |
|
* Another set of compliance enforcement is for drivers to use their |
|
* own compliance limits which can be stored on the EEPROM. The host |
|
* driver or firmware may ensure these are used. |
|
* |
|
* In addition to all this we provide an extra layer of regulatory |
|
* conformance. For drivers which do not have any regulatory |
|
* information CRDA provides the complete regulatory solution. |
|
* For others it provides a community effort on further restrictions |
|
* to enhance compliance. |
|
* |
|
* Note: When number of rules --> infinity we will not be able to |
|
* index on alpha2 any more, instead we'll probably have to |
|
* rely on some SHA1 checksum of the regdomain for example. |
|
* |
|
*/ |
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/export.h> |
|
#include <linux/slab.h> |
|
#include <linux/list.h> |
|
#include <linux/ctype.h> |
|
#include <linux/nl80211.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/verification.h> |
|
#include <linux/moduleparam.h> |
|
#include <linux/firmware.h> |
|
#include <net/cfg80211.h> |
|
#include "core.h" |
|
#include "reg.h" |
|
#include "rdev-ops.h" |
|
#include "nl80211.h" |
|
|
|
/* |
|
* Grace period we give before making sure all current interfaces reside on |
|
* channels allowed by the current regulatory domain. |
|
*/ |
|
#define REG_ENFORCE_GRACE_MS 60000 |
|
|
|
/** |
|
* enum reg_request_treatment - regulatory request treatment |
|
* |
|
* @REG_REQ_OK: continue processing the regulatory request |
|
* @REG_REQ_IGNORE: ignore the regulatory request |
|
* @REG_REQ_INTERSECT: the regulatory domain resulting from this request should |
|
* be intersected with the current one. |
|
* @REG_REQ_ALREADY_SET: the regulatory request will not change the current |
|
* regulatory settings, and no further processing is required. |
|
*/ |
|
enum reg_request_treatment { |
|
REG_REQ_OK, |
|
REG_REQ_IGNORE, |
|
REG_REQ_INTERSECT, |
|
REG_REQ_ALREADY_SET, |
|
}; |
|
|
|
static struct regulatory_request core_request_world = { |
|
.initiator = NL80211_REGDOM_SET_BY_CORE, |
|
.alpha2[0] = '0', |
|
.alpha2[1] = '0', |
|
.intersect = false, |
|
.processed = true, |
|
.country_ie_env = ENVIRON_ANY, |
|
}; |
|
|
|
/* |
|
* Receipt of information from last regulatory request, |
|
* protected by RTNL (and can be accessed with RCU protection) |
|
*/ |
|
static struct regulatory_request __rcu *last_request = |
|
(void __force __rcu *)&core_request_world; |
|
|
|
/* To trigger userspace events and load firmware */ |
|
static struct platform_device *reg_pdev; |
|
|
|
/* |
|
* Central wireless core regulatory domains, we only need two, |
|
* the current one and a world regulatory domain in case we have no |
|
* information to give us an alpha2. |
|
* (protected by RTNL, can be read under RCU) |
|
*/ |
|
const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
|
|
|
/* |
|
* Number of devices that registered to the core |
|
* that support cellular base station regulatory hints |
|
* (protected by RTNL) |
|
*/ |
|
static int reg_num_devs_support_basehint; |
|
|
|
/* |
|
* State variable indicating if the platform on which the devices |
|
* are attached is operating in an indoor environment. The state variable |
|
* is relevant for all registered devices. |
|
*/ |
|
static bool reg_is_indoor; |
|
static DEFINE_SPINLOCK(reg_indoor_lock); |
|
|
|
/* Used to track the userspace process controlling the indoor setting */ |
|
static u32 reg_is_indoor_portid; |
|
|
|
static void restore_regulatory_settings(bool reset_user, bool cached); |
|
static void print_regdomain(const struct ieee80211_regdomain *rd); |
|
static void reg_process_hint(struct regulatory_request *reg_request); |
|
|
|
static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
|
{ |
|
return rcu_dereference_rtnl(cfg80211_regdomain); |
|
} |
|
|
|
/* |
|
* Returns the regulatory domain associated with the wiphy. |
|
* |
|
* Requires any of RTNL, wiphy mutex or RCU protection. |
|
*/ |
|
const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
|
{ |
|
return rcu_dereference_check(wiphy->regd, |
|
lockdep_is_held(&wiphy->mtx) || |
|
lockdep_rtnl_is_held()); |
|
} |
|
EXPORT_SYMBOL(get_wiphy_regdom); |
|
|
|
static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
|
{ |
|
switch (dfs_region) { |
|
case NL80211_DFS_UNSET: |
|
return "unset"; |
|
case NL80211_DFS_FCC: |
|
return "FCC"; |
|
case NL80211_DFS_ETSI: |
|
return "ETSI"; |
|
case NL80211_DFS_JP: |
|
return "JP"; |
|
} |
|
return "Unknown"; |
|
} |
|
|
|
enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
|
{ |
|
const struct ieee80211_regdomain *regd = NULL; |
|
const struct ieee80211_regdomain *wiphy_regd = NULL; |
|
enum nl80211_dfs_regions dfs_region; |
|
|
|
rcu_read_lock(); |
|
regd = get_cfg80211_regdom(); |
|
dfs_region = regd->dfs_region; |
|
|
|
if (!wiphy) |
|
goto out; |
|
|
|
wiphy_regd = get_wiphy_regdom(wiphy); |
|
if (!wiphy_regd) |
|
goto out; |
|
|
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
|
dfs_region = wiphy_regd->dfs_region; |
|
goto out; |
|
} |
|
|
|
if (wiphy_regd->dfs_region == regd->dfs_region) |
|
goto out; |
|
|
|
pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n", |
|
dev_name(&wiphy->dev), |
|
reg_dfs_region_str(wiphy_regd->dfs_region), |
|
reg_dfs_region_str(regd->dfs_region)); |
|
|
|
out: |
|
rcu_read_unlock(); |
|
|
|
return dfs_region; |
|
} |
|
|
|
static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
|
{ |
|
if (!r) |
|
return; |
|
kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); |
|
} |
|
|
|
static struct regulatory_request *get_last_request(void) |
|
{ |
|
return rcu_dereference_rtnl(last_request); |
|
} |
|
|
|
/* Used to queue up regulatory hints */ |
|
static LIST_HEAD(reg_requests_list); |
|
static DEFINE_SPINLOCK(reg_requests_lock); |
|
|
|
/* Used to queue up beacon hints for review */ |
|
static LIST_HEAD(reg_pending_beacons); |
|
static DEFINE_SPINLOCK(reg_pending_beacons_lock); |
|
|
|
/* Used to keep track of processed beacon hints */ |
|
static LIST_HEAD(reg_beacon_list); |
|
|
|
struct reg_beacon { |
|
struct list_head list; |
|
struct ieee80211_channel chan; |
|
}; |
|
|
|
static void reg_check_chans_work(struct work_struct *work); |
|
static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); |
|
|
|
static void reg_todo(struct work_struct *work); |
|
static DECLARE_WORK(reg_work, reg_todo); |
|
|
|
/* We keep a static world regulatory domain in case of the absence of CRDA */ |
|
static const struct ieee80211_regdomain world_regdom = { |
|
.n_reg_rules = 8, |
|
.alpha2 = "00", |
|
.reg_rules = { |
|
/* IEEE 802.11b/g, channels 1..11 */ |
|
REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), |
|
/* IEEE 802.11b/g, channels 12..13. */ |
|
REG_RULE(2467-10, 2472+10, 20, 6, 20, |
|
NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW), |
|
/* IEEE 802.11 channel 14 - Only JP enables |
|
* this and for 802.11b only */ |
|
REG_RULE(2484-10, 2484+10, 20, 6, 20, |
|
NL80211_RRF_NO_IR | |
|
NL80211_RRF_NO_OFDM), |
|
/* IEEE 802.11a, channel 36..48 */ |
|
REG_RULE(5180-10, 5240+10, 80, 6, 20, |
|
NL80211_RRF_NO_IR | |
|
NL80211_RRF_AUTO_BW), |
|
|
|
/* IEEE 802.11a, channel 52..64 - DFS required */ |
|
REG_RULE(5260-10, 5320+10, 80, 6, 20, |
|
NL80211_RRF_NO_IR | |
|
NL80211_RRF_AUTO_BW | |
|
NL80211_RRF_DFS), |
|
|
|
/* IEEE 802.11a, channel 100..144 - DFS required */ |
|
REG_RULE(5500-10, 5720+10, 160, 6, 20, |
|
NL80211_RRF_NO_IR | |
|
NL80211_RRF_DFS), |
|
|
|
/* IEEE 802.11a, channel 149..165 */ |
|
REG_RULE(5745-10, 5825+10, 80, 6, 20, |
|
NL80211_RRF_NO_IR), |
|
|
|
/* IEEE 802.11ad (60GHz), channels 1..3 */ |
|
REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), |
|
} |
|
}; |
|
|
|
/* protected by RTNL */ |
|
static const struct ieee80211_regdomain *cfg80211_world_regdom = |
|
&world_regdom; |
|
|
|
static char *ieee80211_regdom = "00"; |
|
static char user_alpha2[2]; |
|
static const struct ieee80211_regdomain *cfg80211_user_regdom; |
|
|
|
module_param(ieee80211_regdom, charp, 0444); |
|
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); |
|
|
|
static void reg_free_request(struct regulatory_request *request) |
|
{ |
|
if (request == &core_request_world) |
|
return; |
|
|
|
if (request != get_last_request()) |
|
kfree(request); |
|
} |
|
|
|
static void reg_free_last_request(void) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (lr != &core_request_world && lr) |
|
kfree_rcu(lr, rcu_head); |
|
} |
|
|
|
static void reg_update_last_request(struct regulatory_request *request) |
|
{ |
|
struct regulatory_request *lr; |
|
|
|
lr = get_last_request(); |
|
if (lr == request) |
|
return; |
|
|
|
reg_free_last_request(); |
|
rcu_assign_pointer(last_request, request); |
|
} |
|
|
|
static void reset_regdomains(bool full_reset, |
|
const struct ieee80211_regdomain *new_regdom) |
|
{ |
|
const struct ieee80211_regdomain *r; |
|
|
|
ASSERT_RTNL(); |
|
|
|
r = get_cfg80211_regdom(); |
|
|
|
/* avoid freeing static information or freeing something twice */ |
|
if (r == cfg80211_world_regdom) |
|
r = NULL; |
|
if (cfg80211_world_regdom == &world_regdom) |
|
cfg80211_world_regdom = NULL; |
|
if (r == &world_regdom) |
|
r = NULL; |
|
|
|
rcu_free_regdom(r); |
|
rcu_free_regdom(cfg80211_world_regdom); |
|
|
|
cfg80211_world_regdom = &world_regdom; |
|
rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
|
|
|
if (!full_reset) |
|
return; |
|
|
|
reg_update_last_request(&core_request_world); |
|
} |
|
|
|
/* |
|
* Dynamic world regulatory domain requested by the wireless |
|
* core upon initialization |
|
*/ |
|
static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
|
{ |
|
struct regulatory_request *lr; |
|
|
|
lr = get_last_request(); |
|
|
|
WARN_ON(!lr); |
|
|
|
reset_regdomains(false, rd); |
|
|
|
cfg80211_world_regdom = rd; |
|
} |
|
|
|
bool is_world_regdom(const char *alpha2) |
|
{ |
|
if (!alpha2) |
|
return false; |
|
return alpha2[0] == '0' && alpha2[1] == '0'; |
|
} |
|
|
|
static bool is_alpha2_set(const char *alpha2) |
|
{ |
|
if (!alpha2) |
|
return false; |
|
return alpha2[0] && alpha2[1]; |
|
} |
|
|
|
static bool is_unknown_alpha2(const char *alpha2) |
|
{ |
|
if (!alpha2) |
|
return false; |
|
/* |
|
* Special case where regulatory domain was built by driver |
|
* but a specific alpha2 cannot be determined |
|
*/ |
|
return alpha2[0] == '9' && alpha2[1] == '9'; |
|
} |
|
|
|
static bool is_intersected_alpha2(const char *alpha2) |
|
{ |
|
if (!alpha2) |
|
return false; |
|
/* |
|
* Special case where regulatory domain is the |
|
* result of an intersection between two regulatory domain |
|
* structures |
|
*/ |
|
return alpha2[0] == '9' && alpha2[1] == '8'; |
|
} |
|
|
|
static bool is_an_alpha2(const char *alpha2) |
|
{ |
|
if (!alpha2) |
|
return false; |
|
return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
|
} |
|
|
|
static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
|
{ |
|
if (!alpha2_x || !alpha2_y) |
|
return false; |
|
return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
|
} |
|
|
|
static bool regdom_changes(const char *alpha2) |
|
{ |
|
const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
|
|
|
if (!r) |
|
return true; |
|
return !alpha2_equal(r->alpha2, alpha2); |
|
} |
|
|
|
/* |
|
* The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets |
|
* you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER |
|
* has ever been issued. |
|
*/ |
|
static bool is_user_regdom_saved(void) |
|
{ |
|
if (user_alpha2[0] == '9' && user_alpha2[1] == '7') |
|
return false; |
|
|
|
/* This would indicate a mistake on the design */ |
|
if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
|
"Unexpected user alpha2: %c%c\n", |
|
user_alpha2[0], user_alpha2[1])) |
|
return false; |
|
|
|
return true; |
|
} |
|
|
|
static const struct ieee80211_regdomain * |
|
reg_copy_regd(const struct ieee80211_regdomain *src_regd) |
|
{ |
|
struct ieee80211_regdomain *regd; |
|
unsigned int i; |
|
|
|
regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules), |
|
GFP_KERNEL); |
|
if (!regd) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); |
|
|
|
for (i = 0; i < src_regd->n_reg_rules; i++) |
|
memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], |
|
sizeof(struct ieee80211_reg_rule)); |
|
|
|
return regd; |
|
} |
|
|
|
static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd) |
|
{ |
|
ASSERT_RTNL(); |
|
|
|
if (!IS_ERR(cfg80211_user_regdom)) |
|
kfree(cfg80211_user_regdom); |
|
cfg80211_user_regdom = reg_copy_regd(rd); |
|
} |
|
|
|
struct reg_regdb_apply_request { |
|
struct list_head list; |
|
const struct ieee80211_regdomain *regdom; |
|
}; |
|
|
|
static LIST_HEAD(reg_regdb_apply_list); |
|
static DEFINE_MUTEX(reg_regdb_apply_mutex); |
|
|
|
static void reg_regdb_apply(struct work_struct *work) |
|
{ |
|
struct reg_regdb_apply_request *request; |
|
|
|
rtnl_lock(); |
|
|
|
mutex_lock(®_regdb_apply_mutex); |
|
while (!list_empty(®_regdb_apply_list)) { |
|
request = list_first_entry(®_regdb_apply_list, |
|
struct reg_regdb_apply_request, |
|
list); |
|
list_del(&request->list); |
|
|
|
set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB); |
|
kfree(request); |
|
} |
|
mutex_unlock(®_regdb_apply_mutex); |
|
|
|
rtnl_unlock(); |
|
} |
|
|
|
static DECLARE_WORK(reg_regdb_work, reg_regdb_apply); |
|
|
|
static int reg_schedule_apply(const struct ieee80211_regdomain *regdom) |
|
{ |
|
struct reg_regdb_apply_request *request; |
|
|
|
request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); |
|
if (!request) { |
|
kfree(regdom); |
|
return -ENOMEM; |
|
} |
|
|
|
request->regdom = regdom; |
|
|
|
mutex_lock(®_regdb_apply_mutex); |
|
list_add_tail(&request->list, ®_regdb_apply_list); |
|
mutex_unlock(®_regdb_apply_mutex); |
|
|
|
schedule_work(®_regdb_work); |
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_CFG80211_CRDA_SUPPORT |
|
/* Max number of consecutive attempts to communicate with CRDA */ |
|
#define REG_MAX_CRDA_TIMEOUTS 10 |
|
|
|
static u32 reg_crda_timeouts; |
|
|
|
static void crda_timeout_work(struct work_struct *work); |
|
static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work); |
|
|
|
static void crda_timeout_work(struct work_struct *work) |
|
{ |
|
pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
|
rtnl_lock(); |
|
reg_crda_timeouts++; |
|
restore_regulatory_settings(true, false); |
|
rtnl_unlock(); |
|
} |
|
|
|
static void cancel_crda_timeout(void) |
|
{ |
|
cancel_delayed_work(&crda_timeout); |
|
} |
|
|
|
static void cancel_crda_timeout_sync(void) |
|
{ |
|
cancel_delayed_work_sync(&crda_timeout); |
|
} |
|
|
|
static void reset_crda_timeouts(void) |
|
{ |
|
reg_crda_timeouts = 0; |
|
} |
|
|
|
/* |
|
* This lets us keep regulatory code which is updated on a regulatory |
|
* basis in userspace. |
|
*/ |
|
static int call_crda(const char *alpha2) |
|
{ |
|
char country[12]; |
|
char *env[] = { country, NULL }; |
|
int ret; |
|
|
|
snprintf(country, sizeof(country), "COUNTRY=%c%c", |
|
alpha2[0], alpha2[1]); |
|
|
|
if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { |
|
pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (!is_world_regdom((char *) alpha2)) |
|
pr_debug("Calling CRDA for country: %c%c\n", |
|
alpha2[0], alpha2[1]); |
|
else |
|
pr_debug("Calling CRDA to update world regulatory domain\n"); |
|
|
|
ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
|
if (ret) |
|
return ret; |
|
|
|
queue_delayed_work(system_power_efficient_wq, |
|
&crda_timeout, msecs_to_jiffies(3142)); |
|
return 0; |
|
} |
|
#else |
|
static inline void cancel_crda_timeout(void) {} |
|
static inline void cancel_crda_timeout_sync(void) {} |
|
static inline void reset_crda_timeouts(void) {} |
|
static inline int call_crda(const char *alpha2) |
|
{ |
|
return -ENODATA; |
|
} |
|
#endif /* CONFIG_CFG80211_CRDA_SUPPORT */ |
|
|
|
/* code to directly load a firmware database through request_firmware */ |
|
static const struct fwdb_header *regdb; |
|
|
|
struct fwdb_country { |
|
u8 alpha2[2]; |
|
__be16 coll_ptr; |
|
/* this struct cannot be extended */ |
|
} __packed __aligned(4); |
|
|
|
struct fwdb_collection { |
|
u8 len; |
|
u8 n_rules; |
|
u8 dfs_region; |
|
/* no optional data yet */ |
|
/* aligned to 2, then followed by __be16 array of rule pointers */ |
|
} __packed __aligned(4); |
|
|
|
enum fwdb_flags { |
|
FWDB_FLAG_NO_OFDM = BIT(0), |
|
FWDB_FLAG_NO_OUTDOOR = BIT(1), |
|
FWDB_FLAG_DFS = BIT(2), |
|
FWDB_FLAG_NO_IR = BIT(3), |
|
FWDB_FLAG_AUTO_BW = BIT(4), |
|
}; |
|
|
|
struct fwdb_wmm_ac { |
|
u8 ecw; |
|
u8 aifsn; |
|
__be16 cot; |
|
} __packed; |
|
|
|
struct fwdb_wmm_rule { |
|
struct fwdb_wmm_ac client[IEEE80211_NUM_ACS]; |
|
struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS]; |
|
} __packed; |
|
|
|
struct fwdb_rule { |
|
u8 len; |
|
u8 flags; |
|
__be16 max_eirp; |
|
__be32 start, end, max_bw; |
|
/* start of optional data */ |
|
__be16 cac_timeout; |
|
__be16 wmm_ptr; |
|
} __packed __aligned(4); |
|
|
|
#define FWDB_MAGIC 0x52474442 |
|
#define FWDB_VERSION 20 |
|
|
|
struct fwdb_header { |
|
__be32 magic; |
|
__be32 version; |
|
struct fwdb_country country[]; |
|
} __packed __aligned(4); |
|
|
|
static int ecw2cw(int ecw) |
|
{ |
|
return (1 << ecw) - 1; |
|
} |
|
|
|
static bool valid_wmm(struct fwdb_wmm_rule *rule) |
|
{ |
|
struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule; |
|
int i; |
|
|
|
for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) { |
|
u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4); |
|
u16 cw_max = ecw2cw(ac[i].ecw & 0x0f); |
|
u8 aifsn = ac[i].aifsn; |
|
|
|
if (cw_min >= cw_max) |
|
return false; |
|
|
|
if (aifsn < 1) |
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr) |
|
{ |
|
struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2)); |
|
|
|
if ((u8 *)rule + sizeof(rule->len) > data + size) |
|
return false; |
|
|
|
/* mandatory fields */ |
|
if (rule->len < offsetofend(struct fwdb_rule, max_bw)) |
|
return false; |
|
if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) { |
|
u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2; |
|
struct fwdb_wmm_rule *wmm; |
|
|
|
if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size) |
|
return false; |
|
|
|
wmm = (void *)(data + wmm_ptr); |
|
|
|
if (!valid_wmm(wmm)) |
|
return false; |
|
} |
|
return true; |
|
} |
|
|
|
static bool valid_country(const u8 *data, unsigned int size, |
|
const struct fwdb_country *country) |
|
{ |
|
unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; |
|
struct fwdb_collection *coll = (void *)(data + ptr); |
|
__be16 *rules_ptr; |
|
unsigned int i; |
|
|
|
/* make sure we can read len/n_rules */ |
|
if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size) |
|
return false; |
|
|
|
/* make sure base struct and all rules fit */ |
|
if ((u8 *)coll + ALIGN(coll->len, 2) + |
|
(coll->n_rules * 2) > data + size) |
|
return false; |
|
|
|
/* mandatory fields must exist */ |
|
if (coll->len < offsetofend(struct fwdb_collection, dfs_region)) |
|
return false; |
|
|
|
rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); |
|
|
|
for (i = 0; i < coll->n_rules; i++) { |
|
u16 rule_ptr = be16_to_cpu(rules_ptr[i]); |
|
|
|
if (!valid_rule(data, size, rule_ptr)) |
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
#ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB |
|
static struct key *builtin_regdb_keys; |
|
|
|
static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen) |
|
{ |
|
const u8 *end = p + buflen; |
|
size_t plen; |
|
key_ref_t key; |
|
|
|
while (p < end) { |
|
/* Each cert begins with an ASN.1 SEQUENCE tag and must be more |
|
* than 256 bytes in size. |
|
*/ |
|
if (end - p < 4) |
|
goto dodgy_cert; |
|
if (p[0] != 0x30 && |
|
p[1] != 0x82) |
|
goto dodgy_cert; |
|
plen = (p[2] << 8) | p[3]; |
|
plen += 4; |
|
if (plen > end - p) |
|
goto dodgy_cert; |
|
|
|
key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1), |
|
"asymmetric", NULL, p, plen, |
|
((KEY_POS_ALL & ~KEY_POS_SETATTR) | |
|
KEY_USR_VIEW | KEY_USR_READ), |
|
KEY_ALLOC_NOT_IN_QUOTA | |
|
KEY_ALLOC_BUILT_IN | |
|
KEY_ALLOC_BYPASS_RESTRICTION); |
|
if (IS_ERR(key)) { |
|
pr_err("Problem loading in-kernel X.509 certificate (%ld)\n", |
|
PTR_ERR(key)); |
|
} else { |
|
pr_notice("Loaded X.509 cert '%s'\n", |
|
key_ref_to_ptr(key)->description); |
|
key_ref_put(key); |
|
} |
|
p += plen; |
|
} |
|
|
|
return; |
|
|
|
dodgy_cert: |
|
pr_err("Problem parsing in-kernel X.509 certificate list\n"); |
|
} |
|
|
|
static int __init load_builtin_regdb_keys(void) |
|
{ |
|
builtin_regdb_keys = |
|
keyring_alloc(".builtin_regdb_keys", |
|
KUIDT_INIT(0), KGIDT_INIT(0), current_cred(), |
|
((KEY_POS_ALL & ~KEY_POS_SETATTR) | |
|
KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH), |
|
KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL); |
|
if (IS_ERR(builtin_regdb_keys)) |
|
return PTR_ERR(builtin_regdb_keys); |
|
|
|
pr_notice("Loading compiled-in X.509 certificates for regulatory database\n"); |
|
|
|
#ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS |
|
load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len); |
|
#endif |
|
#ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR |
|
if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0') |
|
load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len); |
|
#endif |
|
|
|
return 0; |
|
} |
|
|
|
static bool regdb_has_valid_signature(const u8 *data, unsigned int size) |
|
{ |
|
const struct firmware *sig; |
|
bool result; |
|
|
|
if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev)) |
|
return false; |
|
|
|
result = verify_pkcs7_signature(data, size, sig->data, sig->size, |
|
builtin_regdb_keys, |
|
VERIFYING_UNSPECIFIED_SIGNATURE, |
|
NULL, NULL) == 0; |
|
|
|
release_firmware(sig); |
|
|
|
return result; |
|
} |
|
|
|
static void free_regdb_keyring(void) |
|
{ |
|
key_put(builtin_regdb_keys); |
|
} |
|
#else |
|
static int load_builtin_regdb_keys(void) |
|
{ |
|
return 0; |
|
} |
|
|
|
static bool regdb_has_valid_signature(const u8 *data, unsigned int size) |
|
{ |
|
return true; |
|
} |
|
|
|
static void free_regdb_keyring(void) |
|
{ |
|
} |
|
#endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */ |
|
|
|
static bool valid_regdb(const u8 *data, unsigned int size) |
|
{ |
|
const struct fwdb_header *hdr = (void *)data; |
|
const struct fwdb_country *country; |
|
|
|
if (size < sizeof(*hdr)) |
|
return false; |
|
|
|
if (hdr->magic != cpu_to_be32(FWDB_MAGIC)) |
|
return false; |
|
|
|
if (hdr->version != cpu_to_be32(FWDB_VERSION)) |
|
return false; |
|
|
|
if (!regdb_has_valid_signature(data, size)) |
|
return false; |
|
|
|
country = &hdr->country[0]; |
|
while ((u8 *)(country + 1) <= data + size) { |
|
if (!country->coll_ptr) |
|
break; |
|
if (!valid_country(data, size, country)) |
|
return false; |
|
country++; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static void set_wmm_rule(const struct fwdb_header *db, |
|
const struct fwdb_country *country, |
|
const struct fwdb_rule *rule, |
|
struct ieee80211_reg_rule *rrule) |
|
{ |
|
struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule; |
|
struct fwdb_wmm_rule *wmm; |
|
unsigned int i, wmm_ptr; |
|
|
|
wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2; |
|
wmm = (void *)((u8 *)db + wmm_ptr); |
|
|
|
if (!valid_wmm(wmm)) { |
|
pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n", |
|
be32_to_cpu(rule->start), be32_to_cpu(rule->end), |
|
country->alpha2[0], country->alpha2[1]); |
|
return; |
|
} |
|
|
|
for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
|
wmm_rule->client[i].cw_min = |
|
ecw2cw((wmm->client[i].ecw & 0xf0) >> 4); |
|
wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f); |
|
wmm_rule->client[i].aifsn = wmm->client[i].aifsn; |
|
wmm_rule->client[i].cot = |
|
1000 * be16_to_cpu(wmm->client[i].cot); |
|
wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4); |
|
wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f); |
|
wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn; |
|
wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot); |
|
} |
|
|
|
rrule->has_wmm = true; |
|
} |
|
|
|
static int __regdb_query_wmm(const struct fwdb_header *db, |
|
const struct fwdb_country *country, int freq, |
|
struct ieee80211_reg_rule *rrule) |
|
{ |
|
unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; |
|
struct fwdb_collection *coll = (void *)((u8 *)db + ptr); |
|
int i; |
|
|
|
for (i = 0; i < coll->n_rules; i++) { |
|
__be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); |
|
unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; |
|
struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); |
|
|
|
if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr)) |
|
continue; |
|
|
|
if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) && |
|
freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) { |
|
set_wmm_rule(db, country, rule, rrule); |
|
return 0; |
|
} |
|
} |
|
|
|
return -ENODATA; |
|
} |
|
|
|
int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule) |
|
{ |
|
const struct fwdb_header *hdr = regdb; |
|
const struct fwdb_country *country; |
|
|
|
if (!regdb) |
|
return -ENODATA; |
|
|
|
if (IS_ERR(regdb)) |
|
return PTR_ERR(regdb); |
|
|
|
country = &hdr->country[0]; |
|
while (country->coll_ptr) { |
|
if (alpha2_equal(alpha2, country->alpha2)) |
|
return __regdb_query_wmm(regdb, country, freq, rule); |
|
|
|
country++; |
|
} |
|
|
|
return -ENODATA; |
|
} |
|
EXPORT_SYMBOL(reg_query_regdb_wmm); |
|
|
|
static int regdb_query_country(const struct fwdb_header *db, |
|
const struct fwdb_country *country) |
|
{ |
|
unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; |
|
struct fwdb_collection *coll = (void *)((u8 *)db + ptr); |
|
struct ieee80211_regdomain *regdom; |
|
unsigned int i; |
|
|
|
regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules), |
|
GFP_KERNEL); |
|
if (!regdom) |
|
return -ENOMEM; |
|
|
|
regdom->n_reg_rules = coll->n_rules; |
|
regdom->alpha2[0] = country->alpha2[0]; |
|
regdom->alpha2[1] = country->alpha2[1]; |
|
regdom->dfs_region = coll->dfs_region; |
|
|
|
for (i = 0; i < regdom->n_reg_rules; i++) { |
|
__be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); |
|
unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; |
|
struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); |
|
struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i]; |
|
|
|
rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start); |
|
rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end); |
|
rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw); |
|
|
|
rrule->power_rule.max_antenna_gain = 0; |
|
rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp); |
|
|
|
rrule->flags = 0; |
|
if (rule->flags & FWDB_FLAG_NO_OFDM) |
|
rrule->flags |= NL80211_RRF_NO_OFDM; |
|
if (rule->flags & FWDB_FLAG_NO_OUTDOOR) |
|
rrule->flags |= NL80211_RRF_NO_OUTDOOR; |
|
if (rule->flags & FWDB_FLAG_DFS) |
|
rrule->flags |= NL80211_RRF_DFS; |
|
if (rule->flags & FWDB_FLAG_NO_IR) |
|
rrule->flags |= NL80211_RRF_NO_IR; |
|
if (rule->flags & FWDB_FLAG_AUTO_BW) |
|
rrule->flags |= NL80211_RRF_AUTO_BW; |
|
|
|
rrule->dfs_cac_ms = 0; |
|
|
|
/* handle optional data */ |
|
if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout)) |
|
rrule->dfs_cac_ms = |
|
1000 * be16_to_cpu(rule->cac_timeout); |
|
if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) |
|
set_wmm_rule(db, country, rule, rrule); |
|
} |
|
|
|
return reg_schedule_apply(regdom); |
|
} |
|
|
|
static int query_regdb(const char *alpha2) |
|
{ |
|
const struct fwdb_header *hdr = regdb; |
|
const struct fwdb_country *country; |
|
|
|
ASSERT_RTNL(); |
|
|
|
if (IS_ERR(regdb)) |
|
return PTR_ERR(regdb); |
|
|
|
country = &hdr->country[0]; |
|
while (country->coll_ptr) { |
|
if (alpha2_equal(alpha2, country->alpha2)) |
|
return regdb_query_country(regdb, country); |
|
country++; |
|
} |
|
|
|
return -ENODATA; |
|
} |
|
|
|
static void regdb_fw_cb(const struct firmware *fw, void *context) |
|
{ |
|
int set_error = 0; |
|
bool restore = true; |
|
void *db; |
|
|
|
if (!fw) { |
|
pr_info("failed to load regulatory.db\n"); |
|
set_error = -ENODATA; |
|
} else if (!valid_regdb(fw->data, fw->size)) { |
|
pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n"); |
|
set_error = -EINVAL; |
|
} |
|
|
|
rtnl_lock(); |
|
if (regdb && !IS_ERR(regdb)) { |
|
/* negative case - a bug |
|
* positive case - can happen due to race in case of multiple cb's in |
|
* queue, due to usage of asynchronous callback |
|
* |
|
* Either case, just restore and free new db. |
|
*/ |
|
} else if (set_error) { |
|
regdb = ERR_PTR(set_error); |
|
} else if (fw) { |
|
db = kmemdup(fw->data, fw->size, GFP_KERNEL); |
|
if (db) { |
|
regdb = db; |
|
restore = context && query_regdb(context); |
|
} else { |
|
restore = true; |
|
} |
|
} |
|
|
|
if (restore) |
|
restore_regulatory_settings(true, false); |
|
|
|
rtnl_unlock(); |
|
|
|
kfree(context); |
|
|
|
release_firmware(fw); |
|
} |
|
|
|
static int query_regdb_file(const char *alpha2) |
|
{ |
|
ASSERT_RTNL(); |
|
|
|
if (regdb) |
|
return query_regdb(alpha2); |
|
|
|
alpha2 = kmemdup(alpha2, 2, GFP_KERNEL); |
|
if (!alpha2) |
|
return -ENOMEM; |
|
|
|
return request_firmware_nowait(THIS_MODULE, true, "regulatory.db", |
|
®_pdev->dev, GFP_KERNEL, |
|
(void *)alpha2, regdb_fw_cb); |
|
} |
|
|
|
int reg_reload_regdb(void) |
|
{ |
|
const struct firmware *fw; |
|
void *db; |
|
int err; |
|
const struct ieee80211_regdomain *current_regdomain; |
|
struct regulatory_request *request; |
|
|
|
err = request_firmware(&fw, "regulatory.db", ®_pdev->dev); |
|
if (err) |
|
return err; |
|
|
|
if (!valid_regdb(fw->data, fw->size)) { |
|
err = -ENODATA; |
|
goto out; |
|
} |
|
|
|
db = kmemdup(fw->data, fw->size, GFP_KERNEL); |
|
if (!db) { |
|
err = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
rtnl_lock(); |
|
if (!IS_ERR_OR_NULL(regdb)) |
|
kfree(regdb); |
|
regdb = db; |
|
|
|
/* reset regulatory domain */ |
|
current_regdomain = get_cfg80211_regdom(); |
|
|
|
request = kzalloc(sizeof(*request), GFP_KERNEL); |
|
if (!request) { |
|
err = -ENOMEM; |
|
goto out_unlock; |
|
} |
|
|
|
request->wiphy_idx = WIPHY_IDX_INVALID; |
|
request->alpha2[0] = current_regdomain->alpha2[0]; |
|
request->alpha2[1] = current_regdomain->alpha2[1]; |
|
request->initiator = NL80211_REGDOM_SET_BY_CORE; |
|
request->user_reg_hint_type = NL80211_USER_REG_HINT_USER; |
|
|
|
reg_process_hint(request); |
|
|
|
out_unlock: |
|
rtnl_unlock(); |
|
out: |
|
release_firmware(fw); |
|
return err; |
|
} |
|
|
|
static bool reg_query_database(struct regulatory_request *request) |
|
{ |
|
if (query_regdb_file(request->alpha2) == 0) |
|
return true; |
|
|
|
if (call_crda(request->alpha2) == 0) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
bool reg_is_valid_request(const char *alpha2) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (!lr || lr->processed) |
|
return false; |
|
|
|
return alpha2_equal(lr->alpha2, alpha2); |
|
} |
|
|
|
static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
/* |
|
* Follow the driver's regulatory domain, if present, unless a country |
|
* IE has been processed or a user wants to help complaince further |
|
*/ |
|
if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
|
lr->initiator != NL80211_REGDOM_SET_BY_USER && |
|
wiphy->regd) |
|
return get_wiphy_regdom(wiphy); |
|
|
|
return get_cfg80211_regdom(); |
|
} |
|
|
|
static unsigned int |
|
reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, |
|
const struct ieee80211_reg_rule *rule) |
|
{ |
|
const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
|
const struct ieee80211_freq_range *freq_range_tmp; |
|
const struct ieee80211_reg_rule *tmp; |
|
u32 start_freq, end_freq, idx, no; |
|
|
|
for (idx = 0; idx < rd->n_reg_rules; idx++) |
|
if (rule == &rd->reg_rules[idx]) |
|
break; |
|
|
|
if (idx == rd->n_reg_rules) |
|
return 0; |
|
|
|
/* get start_freq */ |
|
no = idx; |
|
|
|
while (no) { |
|
tmp = &rd->reg_rules[--no]; |
|
freq_range_tmp = &tmp->freq_range; |
|
|
|
if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) |
|
break; |
|
|
|
freq_range = freq_range_tmp; |
|
} |
|
|
|
start_freq = freq_range->start_freq_khz; |
|
|
|
/* get end_freq */ |
|
freq_range = &rule->freq_range; |
|
no = idx; |
|
|
|
while (no < rd->n_reg_rules - 1) { |
|
tmp = &rd->reg_rules[++no]; |
|
freq_range_tmp = &tmp->freq_range; |
|
|
|
if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) |
|
break; |
|
|
|
freq_range = freq_range_tmp; |
|
} |
|
|
|
end_freq = freq_range->end_freq_khz; |
|
|
|
return end_freq - start_freq; |
|
} |
|
|
|
unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
|
const struct ieee80211_reg_rule *rule) |
|
{ |
|
unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); |
|
|
|
if (rule->flags & NL80211_RRF_NO_160MHZ) |
|
bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); |
|
if (rule->flags & NL80211_RRF_NO_80MHZ) |
|
bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); |
|
|
|
/* |
|
* HT40+/HT40- limits are handled per-channel. Only limit BW if both |
|
* are not allowed. |
|
*/ |
|
if (rule->flags & NL80211_RRF_NO_HT40MINUS && |
|
rule->flags & NL80211_RRF_NO_HT40PLUS) |
|
bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); |
|
|
|
return bw; |
|
} |
|
|
|
/* Sanity check on a regulatory rule */ |
|
static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
|
{ |
|
const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
|
u32 freq_diff; |
|
|
|
if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
|
return false; |
|
|
|
if (freq_range->start_freq_khz > freq_range->end_freq_khz) |
|
return false; |
|
|
|
freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
|
|
|
if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
|
freq_range->max_bandwidth_khz > freq_diff) |
|
return false; |
|
|
|
return true; |
|
} |
|
|
|
static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
|
{ |
|
const struct ieee80211_reg_rule *reg_rule = NULL; |
|
unsigned int i; |
|
|
|
if (!rd->n_reg_rules) |
|
return false; |
|
|
|
if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
|
return false; |
|
|
|
for (i = 0; i < rd->n_reg_rules; i++) { |
|
reg_rule = &rd->reg_rules[i]; |
|
if (!is_valid_reg_rule(reg_rule)) |
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
/** |
|
* freq_in_rule_band - tells us if a frequency is in a frequency band |
|
* @freq_range: frequency rule we want to query |
|
* @freq_khz: frequency we are inquiring about |
|
* |
|
* This lets us know if a specific frequency rule is or is not relevant to |
|
* a specific frequency's band. Bands are device specific and artificial |
|
* definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
|
* however it is safe for now to assume that a frequency rule should not be |
|
* part of a frequency's band if the start freq or end freq are off by more |
|
* than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the |
|
* 60 GHz band. |
|
* This resolution can be lowered and should be considered as we add |
|
* regulatory rule support for other "bands". |
|
**/ |
|
static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, |
|
u32 freq_khz) |
|
{ |
|
#define ONE_GHZ_IN_KHZ 1000000 |
|
/* |
|
* From 802.11ad: directional multi-gigabit (DMG): |
|
* Pertaining to operation in a frequency band containing a channel |
|
* with the Channel starting frequency above 45 GHz. |
|
*/ |
|
u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? |
|
20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; |
|
if (abs(freq_khz - freq_range->start_freq_khz) <= limit) |
|
return true; |
|
if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
|
return true; |
|
return false; |
|
#undef ONE_GHZ_IN_KHZ |
|
} |
|
|
|
/* |
|
* Later on we can perhaps use the more restrictive DFS |
|
* region but we don't have information for that yet so |
|
* for now simply disallow conflicts. |
|
*/ |
|
static enum nl80211_dfs_regions |
|
reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, |
|
const enum nl80211_dfs_regions dfs_region2) |
|
{ |
|
if (dfs_region1 != dfs_region2) |
|
return NL80211_DFS_UNSET; |
|
return dfs_region1; |
|
} |
|
|
|
static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1, |
|
const struct ieee80211_wmm_ac *wmm_ac2, |
|
struct ieee80211_wmm_ac *intersect) |
|
{ |
|
intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min); |
|
intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max); |
|
intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot); |
|
intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn); |
|
} |
|
|
|
/* |
|
* Helper for regdom_intersect(), this does the real |
|
* mathematical intersection fun |
|
*/ |
|
static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
|
const struct ieee80211_regdomain *rd2, |
|
const struct ieee80211_reg_rule *rule1, |
|
const struct ieee80211_reg_rule *rule2, |
|
struct ieee80211_reg_rule *intersected_rule) |
|
{ |
|
const struct ieee80211_freq_range *freq_range1, *freq_range2; |
|
struct ieee80211_freq_range *freq_range; |
|
const struct ieee80211_power_rule *power_rule1, *power_rule2; |
|
struct ieee80211_power_rule *power_rule; |
|
const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2; |
|
struct ieee80211_wmm_rule *wmm_rule; |
|
u32 freq_diff, max_bandwidth1, max_bandwidth2; |
|
|
|
freq_range1 = &rule1->freq_range; |
|
freq_range2 = &rule2->freq_range; |
|
freq_range = &intersected_rule->freq_range; |
|
|
|
power_rule1 = &rule1->power_rule; |
|
power_rule2 = &rule2->power_rule; |
|
power_rule = &intersected_rule->power_rule; |
|
|
|
wmm_rule1 = &rule1->wmm_rule; |
|
wmm_rule2 = &rule2->wmm_rule; |
|
wmm_rule = &intersected_rule->wmm_rule; |
|
|
|
freq_range->start_freq_khz = max(freq_range1->start_freq_khz, |
|
freq_range2->start_freq_khz); |
|
freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
|
freq_range2->end_freq_khz); |
|
|
|
max_bandwidth1 = freq_range1->max_bandwidth_khz; |
|
max_bandwidth2 = freq_range2->max_bandwidth_khz; |
|
|
|
if (rule1->flags & NL80211_RRF_AUTO_BW) |
|
max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); |
|
if (rule2->flags & NL80211_RRF_AUTO_BW) |
|
max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); |
|
|
|
freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); |
|
|
|
intersected_rule->flags = rule1->flags | rule2->flags; |
|
|
|
/* |
|
* In case NL80211_RRF_AUTO_BW requested for both rules |
|
* set AUTO_BW in intersected rule also. Next we will |
|
* calculate BW correctly in handle_channel function. |
|
* In other case remove AUTO_BW flag while we calculate |
|
* maximum bandwidth correctly and auto calculation is |
|
* not required. |
|
*/ |
|
if ((rule1->flags & NL80211_RRF_AUTO_BW) && |
|
(rule2->flags & NL80211_RRF_AUTO_BW)) |
|
intersected_rule->flags |= NL80211_RRF_AUTO_BW; |
|
else |
|
intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; |
|
|
|
freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
|
if (freq_range->max_bandwidth_khz > freq_diff) |
|
freq_range->max_bandwidth_khz = freq_diff; |
|
|
|
power_rule->max_eirp = min(power_rule1->max_eirp, |
|
power_rule2->max_eirp); |
|
power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, |
|
power_rule2->max_antenna_gain); |
|
|
|
intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
|
rule2->dfs_cac_ms); |
|
|
|
if (rule1->has_wmm && rule2->has_wmm) { |
|
u8 ac; |
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
|
reg_wmm_rules_intersect(&wmm_rule1->client[ac], |
|
&wmm_rule2->client[ac], |
|
&wmm_rule->client[ac]); |
|
reg_wmm_rules_intersect(&wmm_rule1->ap[ac], |
|
&wmm_rule2->ap[ac], |
|
&wmm_rule->ap[ac]); |
|
} |
|
|
|
intersected_rule->has_wmm = true; |
|
} else if (rule1->has_wmm) { |
|
*wmm_rule = *wmm_rule1; |
|
intersected_rule->has_wmm = true; |
|
} else if (rule2->has_wmm) { |
|
*wmm_rule = *wmm_rule2; |
|
intersected_rule->has_wmm = true; |
|
} else { |
|
intersected_rule->has_wmm = false; |
|
} |
|
|
|
if (!is_valid_reg_rule(intersected_rule)) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
/* check whether old rule contains new rule */ |
|
static bool rule_contains(struct ieee80211_reg_rule *r1, |
|
struct ieee80211_reg_rule *r2) |
|
{ |
|
/* for simplicity, currently consider only same flags */ |
|
if (r1->flags != r2->flags) |
|
return false; |
|
|
|
/* verify r1 is more restrictive */ |
|
if ((r1->power_rule.max_antenna_gain > |
|
r2->power_rule.max_antenna_gain) || |
|
r1->power_rule.max_eirp > r2->power_rule.max_eirp) |
|
return false; |
|
|
|
/* make sure r2's range is contained within r1 */ |
|
if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || |
|
r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) |
|
return false; |
|
|
|
/* and finally verify that r1.max_bw >= r2.max_bw */ |
|
if (r1->freq_range.max_bandwidth_khz < |
|
r2->freq_range.max_bandwidth_khz) |
|
return false; |
|
|
|
return true; |
|
} |
|
|
|
/* add or extend current rules. do nothing if rule is already contained */ |
|
static void add_rule(struct ieee80211_reg_rule *rule, |
|
struct ieee80211_reg_rule *reg_rules, u32 *n_rules) |
|
{ |
|
struct ieee80211_reg_rule *tmp_rule; |
|
int i; |
|
|
|
for (i = 0; i < *n_rules; i++) { |
|
tmp_rule = ®_rules[i]; |
|
/* rule is already contained - do nothing */ |
|
if (rule_contains(tmp_rule, rule)) |
|
return; |
|
|
|
/* extend rule if possible */ |
|
if (rule_contains(rule, tmp_rule)) { |
|
memcpy(tmp_rule, rule, sizeof(*rule)); |
|
return; |
|
} |
|
} |
|
|
|
memcpy(®_rules[*n_rules], rule, sizeof(*rule)); |
|
(*n_rules)++; |
|
} |
|
|
|
/** |
|
* regdom_intersect - do the intersection between two regulatory domains |
|
* @rd1: first regulatory domain |
|
* @rd2: second regulatory domain |
|
* |
|
* Use this function to get the intersection between two regulatory domains. |
|
* Once completed we will mark the alpha2 for the rd as intersected, "98", |
|
* as no one single alpha2 can represent this regulatory domain. |
|
* |
|
* Returns a pointer to the regulatory domain structure which will hold the |
|
* resulting intersection of rules between rd1 and rd2. We will |
|
* kzalloc() this structure for you. |
|
*/ |
|
static struct ieee80211_regdomain * |
|
regdom_intersect(const struct ieee80211_regdomain *rd1, |
|
const struct ieee80211_regdomain *rd2) |
|
{ |
|
int r; |
|
unsigned int x, y; |
|
unsigned int num_rules = 0; |
|
const struct ieee80211_reg_rule *rule1, *rule2; |
|
struct ieee80211_reg_rule intersected_rule; |
|
struct ieee80211_regdomain *rd; |
|
|
|
if (!rd1 || !rd2) |
|
return NULL; |
|
|
|
/* |
|
* First we get a count of the rules we'll need, then we actually |
|
* build them. This is to so we can malloc() and free() a |
|
* regdomain once. The reason we use reg_rules_intersect() here |
|
* is it will return -EINVAL if the rule computed makes no sense. |
|
* All rules that do check out OK are valid. |
|
*/ |
|
|
|
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]; |
|
if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
|
&intersected_rule)) |
|
num_rules++; |
|
} |
|
} |
|
|
|
if (!num_rules) |
|
return NULL; |
|
|
|
rd = kzalloc(struct_size(rd, reg_rules, num_rules), 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]; |
|
r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
|
&intersected_rule); |
|
/* |
|
* No need to memset here the intersected rule here as |
|
* we're not using the stack anymore |
|
*/ |
|
if (r) |
|
continue; |
|
|
|
add_rule(&intersected_rule, rd->reg_rules, |
|
&rd->n_reg_rules); |
|
} |
|
} |
|
|
|
rd->alpha2[0] = '9'; |
|
rd->alpha2[1] = '8'; |
|
rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
|
rd2->dfs_region); |
|
|
|
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_NO_IR_ALL) |
|
channel_flags |= IEEE80211_CHAN_NO_IR; |
|
if (rd_flags & NL80211_RRF_DFS) |
|
channel_flags |= IEEE80211_CHAN_RADAR; |
|
if (rd_flags & NL80211_RRF_NO_OFDM) |
|
channel_flags |= IEEE80211_CHAN_NO_OFDM; |
|
if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
|
channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; |
|
if (rd_flags & NL80211_RRF_IR_CONCURRENT) |
|
channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; |
|
if (rd_flags & NL80211_RRF_NO_HT40MINUS) |
|
channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; |
|
if (rd_flags & NL80211_RRF_NO_HT40PLUS) |
|
channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; |
|
if (rd_flags & NL80211_RRF_NO_80MHZ) |
|
channel_flags |= IEEE80211_CHAN_NO_80MHZ; |
|
if (rd_flags & NL80211_RRF_NO_160MHZ) |
|
channel_flags |= IEEE80211_CHAN_NO_160MHZ; |
|
if (rd_flags & NL80211_RRF_NO_HE) |
|
channel_flags |= IEEE80211_CHAN_NO_HE; |
|
return channel_flags; |
|
} |
|
|
|
static const struct ieee80211_reg_rule * |
|
freq_reg_info_regd(u32 center_freq, |
|
const struct ieee80211_regdomain *regd, u32 bw) |
|
{ |
|
int i; |
|
bool band_rule_found = false; |
|
bool bw_fits = false; |
|
|
|
if (!regd) |
|
return ERR_PTR(-EINVAL); |
|
|
|
for (i = 0; i < regd->n_reg_rules; i++) { |
|
const struct ieee80211_reg_rule *rr; |
|
const struct ieee80211_freq_range *fr = NULL; |
|
|
|
rr = ®d->reg_rules[i]; |
|
fr = &rr->freq_range; |
|
|
|
/* |
|
* We only need to know if one frequency rule was |
|
* in center_freq's band, that's enough, so let's |
|
* not overwrite it once found |
|
*/ |
|
if (!band_rule_found) |
|
band_rule_found = freq_in_rule_band(fr, center_freq); |
|
|
|
bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw); |
|
|
|
if (band_rule_found && bw_fits) |
|
return rr; |
|
} |
|
|
|
if (!band_rule_found) |
|
return ERR_PTR(-ERANGE); |
|
|
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
static const struct ieee80211_reg_rule * |
|
__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) |
|
{ |
|
const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); |
|
static const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20}; |
|
const struct ieee80211_reg_rule *reg_rule = ERR_PTR(-ERANGE); |
|
int i = ARRAY_SIZE(bws) - 1; |
|
u32 bw; |
|
|
|
for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) { |
|
reg_rule = freq_reg_info_regd(center_freq, regd, bw); |
|
if (!IS_ERR(reg_rule)) |
|
return reg_rule; |
|
} |
|
|
|
return reg_rule; |
|
} |
|
|
|
const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
|
u32 center_freq) |
|
{ |
|
u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20; |
|
|
|
return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw)); |
|
} |
|
EXPORT_SYMBOL(freq_reg_info); |
|
|
|
const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
|
{ |
|
switch (initiator) { |
|
case NL80211_REGDOM_SET_BY_CORE: |
|
return "core"; |
|
case NL80211_REGDOM_SET_BY_USER: |
|
return "user"; |
|
case NL80211_REGDOM_SET_BY_DRIVER: |
|
return "driver"; |
|
case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
|
return "country element"; |
|
default: |
|
WARN_ON(1); |
|
return "bug"; |
|
} |
|
} |
|
EXPORT_SYMBOL(reg_initiator_name); |
|
|
|
static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd, |
|
const struct ieee80211_reg_rule *reg_rule, |
|
const struct ieee80211_channel *chan) |
|
{ |
|
const struct ieee80211_freq_range *freq_range = NULL; |
|
u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0; |
|
bool is_s1g = chan->band == NL80211_BAND_S1GHZ; |
|
|
|
freq_range = ®_rule->freq_range; |
|
|
|
max_bandwidth_khz = freq_range->max_bandwidth_khz; |
|
center_freq_khz = ieee80211_channel_to_khz(chan); |
|
/* Check if auto calculation requested */ |
|
if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
|
max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
|
|
|
/* If we get a reg_rule we can assume that at least 5Mhz fit */ |
|
if (!cfg80211_does_bw_fit_range(freq_range, |
|
center_freq_khz, |
|
MHZ_TO_KHZ(10))) |
|
bw_flags |= IEEE80211_CHAN_NO_10MHZ; |
|
if (!cfg80211_does_bw_fit_range(freq_range, |
|
center_freq_khz, |
|
MHZ_TO_KHZ(20))) |
|
bw_flags |= IEEE80211_CHAN_NO_20MHZ; |
|
|
|
if (is_s1g) { |
|
/* S1G is strict about non overlapping channels. We can |
|
* calculate which bandwidth is allowed per channel by finding |
|
* the largest bandwidth which cleanly divides the freq_range. |
|
*/ |
|
int edge_offset; |
|
int ch_bw = max_bandwidth_khz; |
|
|
|
while (ch_bw) { |
|
edge_offset = (center_freq_khz - ch_bw / 2) - |
|
freq_range->start_freq_khz; |
|
if (edge_offset % ch_bw == 0) { |
|
switch (KHZ_TO_MHZ(ch_bw)) { |
|
case 1: |
|
bw_flags |= IEEE80211_CHAN_1MHZ; |
|
break; |
|
case 2: |
|
bw_flags |= IEEE80211_CHAN_2MHZ; |
|
break; |
|
case 4: |
|
bw_flags |= IEEE80211_CHAN_4MHZ; |
|
break; |
|
case 8: |
|
bw_flags |= IEEE80211_CHAN_8MHZ; |
|
break; |
|
case 16: |
|
bw_flags |= IEEE80211_CHAN_16MHZ; |
|
break; |
|
default: |
|
/* If we got here, no bandwidths fit on |
|
* this frequency, ie. band edge. |
|
*/ |
|
bw_flags |= IEEE80211_CHAN_DISABLED; |
|
break; |
|
} |
|
break; |
|
} |
|
ch_bw /= 2; |
|
} |
|
} else { |
|
if (max_bandwidth_khz < MHZ_TO_KHZ(10)) |
|
bw_flags |= IEEE80211_CHAN_NO_10MHZ; |
|
if (max_bandwidth_khz < MHZ_TO_KHZ(20)) |
|
bw_flags |= IEEE80211_CHAN_NO_20MHZ; |
|
if (max_bandwidth_khz < MHZ_TO_KHZ(40)) |
|
bw_flags |= IEEE80211_CHAN_NO_HT40; |
|
if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
|
bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
|
if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
|
bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
|
} |
|
return bw_flags; |
|
} |
|
|
|
static void handle_channel_single_rule(struct wiphy *wiphy, |
|
enum nl80211_reg_initiator initiator, |
|
struct ieee80211_channel *chan, |
|
u32 flags, |
|
struct regulatory_request *lr, |
|
struct wiphy *request_wiphy, |
|
const struct ieee80211_reg_rule *reg_rule) |
|
{ |
|
u32 bw_flags = 0; |
|
const struct ieee80211_power_rule *power_rule = NULL; |
|
const struct ieee80211_regdomain *regd; |
|
|
|
regd = reg_get_regdomain(wiphy); |
|
|
|
power_rule = ®_rule->power_rule; |
|
bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
|
request_wiphy && request_wiphy == wiphy && |
|
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
|
/* |
|
* This guarantees the driver's requested regulatory domain |
|
* will always be used as a base for further regulatory |
|
* settings |
|
*/ |
|
chan->flags = chan->orig_flags = |
|
map_regdom_flags(reg_rule->flags) | bw_flags; |
|
chan->max_antenna_gain = chan->orig_mag = |
|
(int) MBI_TO_DBI(power_rule->max_antenna_gain); |
|
chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
|
(int) MBM_TO_DBM(power_rule->max_eirp); |
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) { |
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; |
|
if (reg_rule->dfs_cac_ms) |
|
chan->dfs_cac_ms = reg_rule->dfs_cac_ms; |
|
} |
|
|
|
return; |
|
} |
|
|
|
chan->dfs_state = NL80211_DFS_USABLE; |
|
chan->dfs_state_entered = jiffies; |
|
|
|
chan->beacon_found = false; |
|
chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
|
chan->max_antenna_gain = |
|
min_t(int, chan->orig_mag, |
|
MBI_TO_DBI(power_rule->max_antenna_gain)); |
|
chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) { |
|
if (reg_rule->dfs_cac_ms) |
|
chan->dfs_cac_ms = reg_rule->dfs_cac_ms; |
|
else |
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; |
|
} |
|
|
|
if (chan->orig_mpwr) { |
|
/* |
|
* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
|
* will always follow the passed country IE power settings. |
|
*/ |
|
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
|
wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
|
chan->max_power = chan->max_reg_power; |
|
else |
|
chan->max_power = min(chan->orig_mpwr, |
|
chan->max_reg_power); |
|
} else |
|
chan->max_power = chan->max_reg_power; |
|
} |
|
|
|
static void handle_channel_adjacent_rules(struct wiphy *wiphy, |
|
enum nl80211_reg_initiator initiator, |
|
struct ieee80211_channel *chan, |
|
u32 flags, |
|
struct regulatory_request *lr, |
|
struct wiphy *request_wiphy, |
|
const struct ieee80211_reg_rule *rrule1, |
|
const struct ieee80211_reg_rule *rrule2, |
|
struct ieee80211_freq_range *comb_range) |
|
{ |
|
u32 bw_flags1 = 0; |
|
u32 bw_flags2 = 0; |
|
const struct ieee80211_power_rule *power_rule1 = NULL; |
|
const struct ieee80211_power_rule *power_rule2 = NULL; |
|
const struct ieee80211_regdomain *regd; |
|
|
|
regd = reg_get_regdomain(wiphy); |
|
|
|
power_rule1 = &rrule1->power_rule; |
|
power_rule2 = &rrule2->power_rule; |
|
bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan); |
|
bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan); |
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
|
request_wiphy && request_wiphy == wiphy && |
|
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
|
/* This guarantees the driver's requested regulatory domain |
|
* will always be used as a base for further regulatory |
|
* settings |
|
*/ |
|
chan->flags = |
|
map_regdom_flags(rrule1->flags) | |
|
map_regdom_flags(rrule2->flags) | |
|
bw_flags1 | |
|
bw_flags2; |
|
chan->orig_flags = chan->flags; |
|
chan->max_antenna_gain = |
|
min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain), |
|
MBI_TO_DBI(power_rule2->max_antenna_gain)); |
|
chan->orig_mag = chan->max_antenna_gain; |
|
chan->max_reg_power = |
|
min_t(int, MBM_TO_DBM(power_rule1->max_eirp), |
|
MBM_TO_DBM(power_rule2->max_eirp)); |
|
chan->max_power = chan->max_reg_power; |
|
chan->orig_mpwr = chan->max_reg_power; |
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) { |
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; |
|
if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms) |
|
chan->dfs_cac_ms = max_t(unsigned int, |
|
rrule1->dfs_cac_ms, |
|
rrule2->dfs_cac_ms); |
|
} |
|
|
|
return; |
|
} |
|
|
|
chan->dfs_state = NL80211_DFS_USABLE; |
|
chan->dfs_state_entered = jiffies; |
|
|
|
chan->beacon_found = false; |
|
chan->flags = flags | bw_flags1 | bw_flags2 | |
|
map_regdom_flags(rrule1->flags) | |
|
map_regdom_flags(rrule2->flags); |
|
|
|
/* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz |
|
* (otherwise no adj. rule case), recheck therefore |
|
*/ |
|
if (cfg80211_does_bw_fit_range(comb_range, |
|
ieee80211_channel_to_khz(chan), |
|
MHZ_TO_KHZ(10))) |
|
chan->flags &= ~IEEE80211_CHAN_NO_10MHZ; |
|
if (cfg80211_does_bw_fit_range(comb_range, |
|
ieee80211_channel_to_khz(chan), |
|
MHZ_TO_KHZ(20))) |
|
chan->flags &= ~IEEE80211_CHAN_NO_20MHZ; |
|
|
|
chan->max_antenna_gain = |
|
min_t(int, chan->orig_mag, |
|
min_t(int, |
|
MBI_TO_DBI(power_rule1->max_antenna_gain), |
|
MBI_TO_DBI(power_rule2->max_antenna_gain))); |
|
chan->max_reg_power = min_t(int, |
|
MBM_TO_DBM(power_rule1->max_eirp), |
|
MBM_TO_DBM(power_rule2->max_eirp)); |
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) { |
|
if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms) |
|
chan->dfs_cac_ms = max_t(unsigned int, |
|
rrule1->dfs_cac_ms, |
|
rrule2->dfs_cac_ms); |
|
else |
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; |
|
} |
|
|
|
if (chan->orig_mpwr) { |
|
/* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
|
* will always follow the passed country IE power settings. |
|
*/ |
|
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
|
wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
|
chan->max_power = chan->max_reg_power; |
|
else |
|
chan->max_power = min(chan->orig_mpwr, |
|
chan->max_reg_power); |
|
} else { |
|
chan->max_power = chan->max_reg_power; |
|
} |
|
} |
|
|
|
/* Note that right now we assume the desired channel bandwidth |
|
* is always 20 MHz for each individual channel (HT40 uses 20 MHz |
|
* per channel, the primary and the extension channel). |
|
*/ |
|
static void handle_channel(struct wiphy *wiphy, |
|
enum nl80211_reg_initiator initiator, |
|
struct ieee80211_channel *chan) |
|
{ |
|
const u32 orig_chan_freq = ieee80211_channel_to_khz(chan); |
|
struct regulatory_request *lr = get_last_request(); |
|
struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
|
const struct ieee80211_reg_rule *rrule = NULL; |
|
const struct ieee80211_reg_rule *rrule1 = NULL; |
|
const struct ieee80211_reg_rule *rrule2 = NULL; |
|
|
|
u32 flags = chan->orig_flags; |
|
|
|
rrule = freq_reg_info(wiphy, orig_chan_freq); |
|
if (IS_ERR(rrule)) { |
|
/* check for adjacent match, therefore get rules for |
|
* chan - 20 MHz and chan + 20 MHz and test |
|
* if reg rules are adjacent |
|
*/ |
|
rrule1 = freq_reg_info(wiphy, |
|
orig_chan_freq - MHZ_TO_KHZ(20)); |
|
rrule2 = freq_reg_info(wiphy, |
|
orig_chan_freq + MHZ_TO_KHZ(20)); |
|
if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) { |
|
struct ieee80211_freq_range comb_range; |
|
|
|
if (rrule1->freq_range.end_freq_khz != |
|
rrule2->freq_range.start_freq_khz) |
|
goto disable_chan; |
|
|
|
comb_range.start_freq_khz = |
|
rrule1->freq_range.start_freq_khz; |
|
comb_range.end_freq_khz = |
|
rrule2->freq_range.end_freq_khz; |
|
comb_range.max_bandwidth_khz = |
|
min_t(u32, |
|
rrule1->freq_range.max_bandwidth_khz, |
|
rrule2->freq_range.max_bandwidth_khz); |
|
|
|
if (!cfg80211_does_bw_fit_range(&comb_range, |
|
orig_chan_freq, |
|
MHZ_TO_KHZ(20))) |
|
goto disable_chan; |
|
|
|
handle_channel_adjacent_rules(wiphy, initiator, chan, |
|
flags, lr, request_wiphy, |
|
rrule1, rrule2, |
|
&comb_range); |
|
return; |
|
} |
|
|
|
disable_chan: |
|
/* We will disable all channels that do not match our |
|
* received regulatory rule unless the hint is coming |
|
* from a Country IE and the Country IE had no information |
|
* about a band. The IEEE 802.11 spec allows for an AP |
|
* to send only a subset of the regulatory rules allowed, |
|
* so an AP in the US that only supports 2.4 GHz may only send |
|
* a country IE with information for the 2.4 GHz band |
|
* while 5 GHz is still supported. |
|
*/ |
|
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
|
PTR_ERR(rrule) == -ERANGE) |
|
return; |
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
|
request_wiphy && request_wiphy == wiphy && |
|
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
|
pr_debug("Disabling freq %d.%03d MHz for good\n", |
|
chan->center_freq, chan->freq_offset); |
|
chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
|
chan->flags = chan->orig_flags; |
|
} else { |
|
pr_debug("Disabling freq %d.%03d MHz\n", |
|
chan->center_freq, chan->freq_offset); |
|
chan->flags |= IEEE80211_CHAN_DISABLED; |
|
} |
|
return; |
|
} |
|
|
|
handle_channel_single_rule(wiphy, initiator, chan, flags, lr, |
|
request_wiphy, rrule); |
|
} |
|
|
|
static void handle_band(struct wiphy *wiphy, |
|
enum nl80211_reg_initiator initiator, |
|
struct ieee80211_supported_band *sband) |
|
{ |
|
unsigned int i; |
|
|
|
if (!sband) |
|
return; |
|
|
|
for (i = 0; i < sband->n_channels; i++) |
|
handle_channel(wiphy, initiator, &sband->channels[i]); |
|
} |
|
|
|
static bool reg_request_cell_base(struct regulatory_request *request) |
|
{ |
|
if (request->initiator != NL80211_REGDOM_SET_BY_USER) |
|
return false; |
|
return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
|
} |
|
|
|
bool reg_last_request_cell_base(void) |
|
{ |
|
return reg_request_cell_base(get_last_request()); |
|
} |
|
|
|
#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
|
/* Core specific check */ |
|
static enum reg_request_treatment |
|
reg_ignore_cell_hint(struct regulatory_request *pending_request) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (!reg_num_devs_support_basehint) |
|
return REG_REQ_IGNORE; |
|
|
|
if (reg_request_cell_base(lr) && |
|
!regdom_changes(pending_request->alpha2)) |
|
return REG_REQ_ALREADY_SET; |
|
|
|
return REG_REQ_OK; |
|
} |
|
|
|
/* Device specific check */ |
|
static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) |
|
{ |
|
return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
|
} |
|
#else |
|
static enum reg_request_treatment |
|
reg_ignore_cell_hint(struct regulatory_request *pending_request) |
|
{ |
|
return REG_REQ_IGNORE; |
|
} |
|
|
|
static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) |
|
{ |
|
return true; |
|
} |
|
#endif |
|
|
|
static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
|
{ |
|
if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
|
!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) |
|
return true; |
|
return false; |
|
} |
|
|
|
static bool ignore_reg_update(struct wiphy *wiphy, |
|
enum nl80211_reg_initiator initiator) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
|
return true; |
|
|
|
if (!lr) { |
|
pr_debug("Ignoring regulatory request set by %s since last_request is not set\n", |
|
reg_initiator_name(initiator)); |
|
return true; |
|
} |
|
|
|
if (initiator == NL80211_REGDOM_SET_BY_CORE && |
|
wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
|
pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n", |
|
reg_initiator_name(initiator)); |
|
return true; |
|
} |
|
|
|
/* |
|
* wiphy->regd will be set once the device has its own |
|
* desired regulatory domain set |
|
*/ |
|
if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
|
initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
|
!is_world_regdom(lr->alpha2)) { |
|
pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n", |
|
reg_initiator_name(initiator)); |
|
return true; |
|
} |
|
|
|
if (reg_request_cell_base(lr)) |
|
return reg_dev_ignore_cell_hint(wiphy); |
|
|
|
return false; |
|
} |
|
|
|
static bool reg_is_world_roaming(struct wiphy *wiphy) |
|
{ |
|
const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); |
|
const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) |
|
return true; |
|
|
|
if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
|
wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
|
struct reg_beacon *reg_beacon) |
|
{ |
|
struct ieee80211_supported_band *sband; |
|
struct ieee80211_channel *chan; |
|
bool channel_changed = false; |
|
struct ieee80211_channel chan_before; |
|
|
|
sband = wiphy->bands[reg_beacon->chan.band]; |
|
chan = &sband->channels[chan_idx]; |
|
|
|
if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan))) |
|
return; |
|
|
|
if (chan->beacon_found) |
|
return; |
|
|
|
chan->beacon_found = true; |
|
|
|
if (!reg_is_world_roaming(wiphy)) |
|
return; |
|
|
|
if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
|
return; |
|
|
|
chan_before = *chan; |
|
|
|
if (chan->flags & IEEE80211_CHAN_NO_IR) { |
|
chan->flags &= ~IEEE80211_CHAN_NO_IR; |
|
channel_changed = true; |
|
} |
|
|
|
if (channel_changed) |
|
nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); |
|
} |
|
|
|
/* |
|
* Called when a scan on a wiphy finds a beacon on |
|
* new channel |
|
*/ |
|
static void wiphy_update_new_beacon(struct wiphy *wiphy, |
|
struct reg_beacon *reg_beacon) |
|
{ |
|
unsigned int i; |
|
struct ieee80211_supported_band *sband; |
|
|
|
if (!wiphy->bands[reg_beacon->chan.band]) |
|
return; |
|
|
|
sband = wiphy->bands[reg_beacon->chan.band]; |
|
|
|
for (i = 0; i < sband->n_channels; i++) |
|
handle_reg_beacon(wiphy, i, reg_beacon); |
|
} |
|
|
|
/* |
|
* Called upon reg changes or a new wiphy is added |
|
*/ |
|
static void wiphy_update_beacon_reg(struct wiphy *wiphy) |
|
{ |
|
unsigned int i; |
|
struct ieee80211_supported_band *sband; |
|
struct reg_beacon *reg_beacon; |
|
|
|
list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
|
if (!wiphy->bands[reg_beacon->chan.band]) |
|
continue; |
|
sband = wiphy->bands[reg_beacon->chan.band]; |
|
for (i = 0; i < sband->n_channels; i++) |
|
handle_reg_beacon(wiphy, i, reg_beacon); |
|
} |
|
} |
|
|
|
/* Reap the advantages of previously found beacons */ |
|
static void reg_process_beacons(struct wiphy *wiphy) |
|
{ |
|
/* |
|
* Means we are just firing up cfg80211, so no beacons would |
|
* have been processed yet. |
|
*/ |
|
if (!last_request) |
|
return; |
|
wiphy_update_beacon_reg(wiphy); |
|
} |
|
|
|
static bool is_ht40_allowed(struct ieee80211_channel *chan) |
|
{ |
|
if (!chan) |
|
return false; |
|
if (chan->flags & IEEE80211_CHAN_DISABLED) |
|
return false; |
|
/* This would happen when regulatory rules disallow HT40 completely */ |
|
if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
|
return false; |
|
return true; |
|
} |
|
|
|
static void reg_process_ht_flags_channel(struct wiphy *wiphy, |
|
struct ieee80211_channel *channel) |
|
{ |
|
struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
|
struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
|
const struct ieee80211_regdomain *regd; |
|
unsigned int i; |
|
u32 flags; |
|
|
|
if (!is_ht40_allowed(channel)) { |
|
channel->flags |= IEEE80211_CHAN_NO_HT40; |
|
return; |
|
} |
|
|
|
/* |
|
* We need to ensure the extension channels exist to |
|
* be able to use HT40- or HT40+, this finds them (or not) |
|
*/ |
|
for (i = 0; i < sband->n_channels; i++) { |
|
struct ieee80211_channel *c = &sband->channels[i]; |
|
|
|
if (c->center_freq == (channel->center_freq - 20)) |
|
channel_before = c; |
|
if (c->center_freq == (channel->center_freq + 20)) |
|
channel_after = c; |
|
} |
|
|
|
flags = 0; |
|
regd = get_wiphy_regdom(wiphy); |
|
if (regd) { |
|
const struct ieee80211_reg_rule *reg_rule = |
|
freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq), |
|
regd, MHZ_TO_KHZ(20)); |
|
|
|
if (!IS_ERR(reg_rule)) |
|
flags = reg_rule->flags; |
|
} |
|
|
|
/* |
|
* Please note that this assumes target bandwidth is 20 MHz, |
|
* if that ever changes we also need to change the below logic |
|
* to include that as well. |
|
*/ |
|
if (!is_ht40_allowed(channel_before) || |
|
flags & NL80211_RRF_NO_HT40MINUS) |
|
channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
|
else |
|
channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
|
|
|
if (!is_ht40_allowed(channel_after) || |
|
flags & NL80211_RRF_NO_HT40PLUS) |
|
channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
|
else |
|
channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
|
} |
|
|
|
static void reg_process_ht_flags_band(struct wiphy *wiphy, |
|
struct ieee80211_supported_band *sband) |
|
{ |
|
unsigned int i; |
|
|
|
if (!sband) |
|
return; |
|
|
|
for (i = 0; i < sband->n_channels; i++) |
|
reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
|
} |
|
|
|
static void reg_process_ht_flags(struct wiphy *wiphy) |
|
{ |
|
enum nl80211_band band; |
|
|
|
if (!wiphy) |
|
return; |
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) |
|
reg_process_ht_flags_band(wiphy, wiphy->bands[band]); |
|
} |
|
|
|
static void reg_call_notifier(struct wiphy *wiphy, |
|
struct regulatory_request *request) |
|
{ |
|
if (wiphy->reg_notifier) |
|
wiphy->reg_notifier(wiphy, request); |
|
} |
|
|
|
static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
|
{ |
|
struct cfg80211_chan_def chandef = {}; |
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
|
enum nl80211_iftype iftype; |
|
bool ret; |
|
|
|
wdev_lock(wdev); |
|
iftype = wdev->iftype; |
|
|
|
/* make sure the interface is active */ |
|
if (!wdev->netdev || !netif_running(wdev->netdev)) |
|
goto wdev_inactive_unlock; |
|
|
|
switch (iftype) { |
|
case NL80211_IFTYPE_AP: |
|
case NL80211_IFTYPE_P2P_GO: |
|
case NL80211_IFTYPE_MESH_POINT: |
|
if (!wdev->beacon_interval) |
|
goto wdev_inactive_unlock; |
|
chandef = wdev->chandef; |
|
break; |
|
case NL80211_IFTYPE_ADHOC: |
|
if (!wdev->ssid_len) |
|
goto wdev_inactive_unlock; |
|
chandef = wdev->chandef; |
|
break; |
|
case NL80211_IFTYPE_STATION: |
|
case NL80211_IFTYPE_P2P_CLIENT: |
|
if (!wdev->current_bss || |
|
!wdev->current_bss->pub.channel) |
|
goto wdev_inactive_unlock; |
|
|
|
if (!rdev->ops->get_channel || |
|
rdev_get_channel(rdev, wdev, &chandef)) |
|
cfg80211_chandef_create(&chandef, |
|
wdev->current_bss->pub.channel, |
|
NL80211_CHAN_NO_HT); |
|
break; |
|
case NL80211_IFTYPE_MONITOR: |
|
case NL80211_IFTYPE_AP_VLAN: |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
/* no enforcement required */ |
|
break; |
|
default: |
|
/* others not implemented for now */ |
|
WARN_ON(1); |
|
break; |
|
} |
|
|
|
wdev_unlock(wdev); |
|
|
|
switch (iftype) { |
|
case NL80211_IFTYPE_AP: |
|
case NL80211_IFTYPE_P2P_GO: |
|
case NL80211_IFTYPE_ADHOC: |
|
case NL80211_IFTYPE_MESH_POINT: |
|
wiphy_lock(wiphy); |
|
ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); |
|
wiphy_unlock(wiphy); |
|
|
|
return ret; |
|
case NL80211_IFTYPE_STATION: |
|
case NL80211_IFTYPE_P2P_CLIENT: |
|
return cfg80211_chandef_usable(wiphy, &chandef, |
|
IEEE80211_CHAN_DISABLED); |
|
default: |
|
break; |
|
} |
|
|
|
return true; |
|
|
|
wdev_inactive_unlock: |
|
wdev_unlock(wdev); |
|
return true; |
|
} |
|
|
|
static void reg_leave_invalid_chans(struct wiphy *wiphy) |
|
{ |
|
struct wireless_dev *wdev; |
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
|
|
|
ASSERT_RTNL(); |
|
|
|
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
|
if (!reg_wdev_chan_valid(wiphy, wdev)) |
|
cfg80211_leave(rdev, wdev); |
|
} |
|
|
|
static void reg_check_chans_work(struct work_struct *work) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
|
|
pr_debug("Verifying active interfaces after reg change\n"); |
|
rtnl_lock(); |
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
|
if (!(rdev->wiphy.regulatory_flags & |
|
REGULATORY_IGNORE_STALE_KICKOFF)) |
|
reg_leave_invalid_chans(&rdev->wiphy); |
|
|
|
rtnl_unlock(); |
|
} |
|
|
|
static void reg_check_channels(void) |
|
{ |
|
/* |
|
* Give usermode a chance to do something nicer (move to another |
|
* channel, orderly disconnection), before forcing a disconnection. |
|
*/ |
|
mod_delayed_work(system_power_efficient_wq, |
|
®_check_chans, |
|
msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); |
|
} |
|
|
|
static void wiphy_update_regulatory(struct wiphy *wiphy, |
|
enum nl80211_reg_initiator initiator) |
|
{ |
|
enum nl80211_band band; |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (ignore_reg_update(wiphy, initiator)) { |
|
/* |
|
* Regulatory updates set by CORE are ignored for custom |
|
* regulatory cards. Let us notify the changes to the driver, |
|
* as some drivers used this to restore its orig_* reg domain. |
|
*/ |
|
if (initiator == NL80211_REGDOM_SET_BY_CORE && |
|
wiphy->regulatory_flags & REGULATORY_CUSTOM_REG && |
|
!(wiphy->regulatory_flags & |
|
REGULATORY_WIPHY_SELF_MANAGED)) |
|
reg_call_notifier(wiphy, lr); |
|
return; |
|
} |
|
|
|
lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) |
|
handle_band(wiphy, initiator, wiphy->bands[band]); |
|
|
|
reg_process_beacons(wiphy); |
|
reg_process_ht_flags(wiphy); |
|
reg_call_notifier(wiphy, lr); |
|
} |
|
|
|
static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
struct wiphy *wiphy; |
|
|
|
ASSERT_RTNL(); |
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
|
wiphy = &rdev->wiphy; |
|
wiphy_update_regulatory(wiphy, initiator); |
|
} |
|
|
|
reg_check_channels(); |
|
} |
|
|
|
static void handle_channel_custom(struct wiphy *wiphy, |
|
struct ieee80211_channel *chan, |
|
const struct ieee80211_regdomain *regd, |
|
u32 min_bw) |
|
{ |
|
u32 bw_flags = 0; |
|
const struct ieee80211_reg_rule *reg_rule = NULL; |
|
const struct ieee80211_power_rule *power_rule = NULL; |
|
u32 bw, center_freq_khz; |
|
|
|
center_freq_khz = ieee80211_channel_to_khz(chan); |
|
for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { |
|
reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw); |
|
if (!IS_ERR(reg_rule)) |
|
break; |
|
} |
|
|
|
if (IS_ERR_OR_NULL(reg_rule)) { |
|
pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n", |
|
chan->center_freq, chan->freq_offset); |
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
|
chan->flags |= IEEE80211_CHAN_DISABLED; |
|
} else { |
|
chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
|
chan->flags = chan->orig_flags; |
|
} |
|
return; |
|
} |
|
|
|
power_rule = ®_rule->power_rule; |
|
bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
|
|
|
chan->dfs_state_entered = jiffies; |
|
chan->dfs_state = NL80211_DFS_USABLE; |
|
|
|
chan->beacon_found = false; |
|
|
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
|
chan->flags = chan->orig_flags | bw_flags | |
|
map_regdom_flags(reg_rule->flags); |
|
else |
|
chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
|
|
|
chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
|
chan->max_reg_power = chan->max_power = |
|
(int) MBM_TO_DBM(power_rule->max_eirp); |
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) { |
|
if (reg_rule->dfs_cac_ms) |
|
chan->dfs_cac_ms = reg_rule->dfs_cac_ms; |
|
else |
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; |
|
} |
|
|
|
chan->max_power = chan->max_reg_power; |
|
} |
|
|
|
static void handle_band_custom(struct wiphy *wiphy, |
|
struct ieee80211_supported_band *sband, |
|
const struct ieee80211_regdomain *regd) |
|
{ |
|
unsigned int i; |
|
|
|
if (!sband) |
|
return; |
|
|
|
/* |
|
* We currently assume that you always want at least 20 MHz, |
|
* otherwise channel 12 might get enabled if this rule is |
|
* compatible to US, which permits 2402 - 2472 MHz. |
|
*/ |
|
for (i = 0; i < sband->n_channels; i++) |
|
handle_channel_custom(wiphy, &sband->channels[i], regd, |
|
MHZ_TO_KHZ(20)); |
|
} |
|
|
|
/* Used by drivers prior to wiphy registration */ |
|
void wiphy_apply_custom_regulatory(struct wiphy *wiphy, |
|
const struct ieee80211_regdomain *regd) |
|
{ |
|
const struct ieee80211_regdomain *new_regd, *tmp; |
|
enum nl80211_band band; |
|
unsigned int bands_set = 0; |
|
|
|
WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
|
"wiphy should have REGULATORY_CUSTOM_REG\n"); |
|
wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; |
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) { |
|
if (!wiphy->bands[band]) |
|
continue; |
|
handle_band_custom(wiphy, wiphy->bands[band], regd); |
|
bands_set++; |
|
} |
|
|
|
/* |
|
* no point in calling this if it won't have any effect |
|
* on your device's supported bands. |
|
*/ |
|
WARN_ON(!bands_set); |
|
new_regd = reg_copy_regd(regd); |
|
if (IS_ERR(new_regd)) |
|
return; |
|
|
|
rtnl_lock(); |
|
wiphy_lock(wiphy); |
|
|
|
tmp = get_wiphy_regdom(wiphy); |
|
rcu_assign_pointer(wiphy->regd, new_regd); |
|
rcu_free_regdom(tmp); |
|
|
|
wiphy_unlock(wiphy); |
|
rtnl_unlock(); |
|
} |
|
EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
|
|
|
static void reg_set_request_processed(void) |
|
{ |
|
bool need_more_processing = false; |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
lr->processed = true; |
|
|
|
spin_lock(®_requests_lock); |
|
if (!list_empty(®_requests_list)) |
|
need_more_processing = true; |
|
spin_unlock(®_requests_lock); |
|
|
|
cancel_crda_timeout(); |
|
|
|
if (need_more_processing) |
|
schedule_work(®_work); |
|
} |
|
|
|
/** |
|
* reg_process_hint_core - process core regulatory requests |
|
* @core_request: a pending core regulatory request |
|
* |
|
* The wireless subsystem can use this function to process |
|
* a regulatory request issued by the regulatory core. |
|
*/ |
|
static enum reg_request_treatment |
|
reg_process_hint_core(struct regulatory_request *core_request) |
|
{ |
|
if (reg_query_database(core_request)) { |
|
core_request->intersect = false; |
|
core_request->processed = false; |
|
reg_update_last_request(core_request); |
|
return REG_REQ_OK; |
|
} |
|
|
|
return REG_REQ_IGNORE; |
|
} |
|
|
|
static enum reg_request_treatment |
|
__reg_process_hint_user(struct regulatory_request *user_request) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (reg_request_cell_base(user_request)) |
|
return reg_ignore_cell_hint(user_request); |
|
|
|
if (reg_request_cell_base(lr)) |
|
return REG_REQ_IGNORE; |
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
|
return REG_REQ_INTERSECT; |
|
/* |
|
* If the user knows better the user should set the regdom |
|
* to their country before the IE is picked up |
|
*/ |
|
if (lr->initiator == NL80211_REGDOM_SET_BY_USER && |
|
lr->intersect) |
|
return REG_REQ_IGNORE; |
|
/* |
|
* Process user requests only after previous user/driver/core |
|
* requests have been processed |
|
*/ |
|
if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || |
|
lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
|
lr->initiator == NL80211_REGDOM_SET_BY_USER) && |
|
regdom_changes(lr->alpha2)) |
|
return REG_REQ_IGNORE; |
|
|
|
if (!regdom_changes(user_request->alpha2)) |
|
return REG_REQ_ALREADY_SET; |
|
|
|
return REG_REQ_OK; |
|
} |
|
|
|
/** |
|
* reg_process_hint_user - process user regulatory requests |
|
* @user_request: a pending user regulatory request |
|
* |
|
* The wireless subsystem can use this function to process |
|
* a regulatory request initiated by userspace. |
|
*/ |
|
static enum reg_request_treatment |
|
reg_process_hint_user(struct regulatory_request *user_request) |
|
{ |
|
enum reg_request_treatment treatment; |
|
|
|
treatment = __reg_process_hint_user(user_request); |
|
if (treatment == REG_REQ_IGNORE || |
|
treatment == REG_REQ_ALREADY_SET) |
|
return REG_REQ_IGNORE; |
|
|
|
user_request->intersect = treatment == REG_REQ_INTERSECT; |
|
user_request->processed = false; |
|
|
|
if (reg_query_database(user_request)) { |
|
reg_update_last_request(user_request); |
|
user_alpha2[0] = user_request->alpha2[0]; |
|
user_alpha2[1] = user_request->alpha2[1]; |
|
return REG_REQ_OK; |
|
} |
|
|
|
return REG_REQ_IGNORE; |
|
} |
|
|
|
static enum reg_request_treatment |
|
__reg_process_hint_driver(struct regulatory_request *driver_request) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { |
|
if (regdom_changes(driver_request->alpha2)) |
|
return REG_REQ_OK; |
|
return REG_REQ_ALREADY_SET; |
|
} |
|
|
|
/* |
|
* This would happen if you unplug and plug your card |
|
* back in or if you add a new device for which the previously |
|
* loaded card also agrees on the regulatory domain. |
|
*/ |
|
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
|
!regdom_changes(driver_request->alpha2)) |
|
return REG_REQ_ALREADY_SET; |
|
|
|
return REG_REQ_INTERSECT; |
|
} |
|
|
|
/** |
|
* reg_process_hint_driver - process driver regulatory requests |
|
* @wiphy: the wireless device for the regulatory request |
|
* @driver_request: a pending driver regulatory request |
|
* |
|
* The wireless subsystem can use this function to process |
|
* a regulatory request issued by an 802.11 driver. |
|
* |
|
* Returns one of the different reg request treatment values. |
|
*/ |
|
static enum reg_request_treatment |
|
reg_process_hint_driver(struct wiphy *wiphy, |
|
struct regulatory_request *driver_request) |
|
{ |
|
const struct ieee80211_regdomain *regd, *tmp; |
|
enum reg_request_treatment treatment; |
|
|
|
treatment = __reg_process_hint_driver(driver_request); |
|
|
|
switch (treatment) { |
|
case REG_REQ_OK: |
|
break; |
|
case REG_REQ_IGNORE: |
|
return REG_REQ_IGNORE; |
|
case REG_REQ_INTERSECT: |
|
case REG_REQ_ALREADY_SET: |
|
regd = reg_copy_regd(get_cfg80211_regdom()); |
|
if (IS_ERR(regd)) |
|
return REG_REQ_IGNORE; |
|
|
|
tmp = get_wiphy_regdom(wiphy); |
|
ASSERT_RTNL(); |
|
wiphy_lock(wiphy); |
|
rcu_assign_pointer(wiphy->regd, regd); |
|
wiphy_unlock(wiphy); |
|
rcu_free_regdom(tmp); |
|
} |
|
|
|
|
|
driver_request->intersect = treatment == REG_REQ_INTERSECT; |
|
driver_request->processed = false; |
|
|
|
/* |
|
* Since CRDA will not be called in this case as we already |
|
* have applied the requested regulatory domain before we just |
|
* inform userspace we have processed the request |
|
*/ |
|
if (treatment == REG_REQ_ALREADY_SET) { |
|
nl80211_send_reg_change_event(driver_request); |
|
reg_update_last_request(driver_request); |
|
reg_set_request_processed(); |
|
return REG_REQ_ALREADY_SET; |
|
} |
|
|
|
if (reg_query_database(driver_request)) { |
|
reg_update_last_request(driver_request); |
|
return REG_REQ_OK; |
|
} |
|
|
|
return REG_REQ_IGNORE; |
|
} |
|
|
|
static enum reg_request_treatment |
|
__reg_process_hint_country_ie(struct wiphy *wiphy, |
|
struct regulatory_request *country_ie_request) |
|
{ |
|
struct wiphy *last_wiphy = NULL; |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (reg_request_cell_base(lr)) { |
|
/* Trust a Cell base station over the AP's country IE */ |
|
if (regdom_changes(country_ie_request->alpha2)) |
|
return REG_REQ_IGNORE; |
|
return REG_REQ_ALREADY_SET; |
|
} else { |
|
if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) |
|
return REG_REQ_IGNORE; |
|
} |
|
|
|
if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
|
return -EINVAL; |
|
|
|
if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) |
|
return REG_REQ_OK; |
|
|
|
last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
|
|
|
if (last_wiphy != wiphy) { |
|
/* |
|
* Two cards with two APs claiming different |
|
* Country IE alpha2s. We could |
|
* intersect them, but that seems unlikely |
|
* to be correct. Reject second one for now. |
|
*/ |
|
if (regdom_changes(country_ie_request->alpha2)) |
|
return REG_REQ_IGNORE; |
|
return REG_REQ_ALREADY_SET; |
|
} |
|
|
|
if (regdom_changes(country_ie_request->alpha2)) |
|
return REG_REQ_OK; |
|
return REG_REQ_ALREADY_SET; |
|
} |
|
|
|
/** |
|
* reg_process_hint_country_ie - process regulatory requests from country IEs |
|
* @wiphy: the wireless device for the regulatory request |
|
* @country_ie_request: a regulatory request from a country IE |
|
* |
|
* The wireless subsystem can use this function to process |
|
* a regulatory request issued by a country Information Element. |
|
* |
|
* Returns one of the different reg request treatment values. |
|
*/ |
|
static enum reg_request_treatment |
|
reg_process_hint_country_ie(struct wiphy *wiphy, |
|
struct regulatory_request *country_ie_request) |
|
{ |
|
enum reg_request_treatment treatment; |
|
|
|
treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
|
|
|
switch (treatment) { |
|
case REG_REQ_OK: |
|
break; |
|
case REG_REQ_IGNORE: |
|
return REG_REQ_IGNORE; |
|
case REG_REQ_ALREADY_SET: |
|
reg_free_request(country_ie_request); |
|
return REG_REQ_ALREADY_SET; |
|
case REG_REQ_INTERSECT: |
|
/* |
|
* This doesn't happen yet, not sure we |
|
* ever want to support it for this case. |
|
*/ |
|
WARN_ONCE(1, "Unexpected intersection for country elements"); |
|
return REG_REQ_IGNORE; |
|
} |
|
|
|
country_ie_request->intersect = false; |
|
country_ie_request->processed = false; |
|
|
|
if (reg_query_database(country_ie_request)) { |
|
reg_update_last_request(country_ie_request); |
|
return REG_REQ_OK; |
|
} |
|
|
|
return REG_REQ_IGNORE; |
|
} |
|
|
|
bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2) |
|
{ |
|
const struct ieee80211_regdomain *wiphy1_regd = NULL; |
|
const struct ieee80211_regdomain *wiphy2_regd = NULL; |
|
const struct ieee80211_regdomain *cfg80211_regd = NULL; |
|
bool dfs_domain_same; |
|
|
|
rcu_read_lock(); |
|
|
|
cfg80211_regd = rcu_dereference(cfg80211_regdomain); |
|
wiphy1_regd = rcu_dereference(wiphy1->regd); |
|
if (!wiphy1_regd) |
|
wiphy1_regd = cfg80211_regd; |
|
|
|
wiphy2_regd = rcu_dereference(wiphy2->regd); |
|
if (!wiphy2_regd) |
|
wiphy2_regd = cfg80211_regd; |
|
|
|
dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region; |
|
|
|
rcu_read_unlock(); |
|
|
|
return dfs_domain_same; |
|
} |
|
|
|
static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan, |
|
struct ieee80211_channel *src_chan) |
|
{ |
|
if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) || |
|
!(src_chan->flags & IEEE80211_CHAN_RADAR)) |
|
return; |
|
|
|
if (dst_chan->flags & IEEE80211_CHAN_DISABLED || |
|
src_chan->flags & IEEE80211_CHAN_DISABLED) |
|
return; |
|
|
|
if (src_chan->center_freq == dst_chan->center_freq && |
|
dst_chan->dfs_state == NL80211_DFS_USABLE) { |
|
dst_chan->dfs_state = src_chan->dfs_state; |
|
dst_chan->dfs_state_entered = src_chan->dfs_state_entered; |
|
} |
|
} |
|
|
|
static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy, |
|
struct wiphy *src_wiphy) |
|
{ |
|
struct ieee80211_supported_band *src_sband, *dst_sband; |
|
struct ieee80211_channel *src_chan, *dst_chan; |
|
int i, j, band; |
|
|
|
if (!reg_dfs_domain_same(dst_wiphy, src_wiphy)) |
|
return; |
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) { |
|
dst_sband = dst_wiphy->bands[band]; |
|
src_sband = src_wiphy->bands[band]; |
|
if (!dst_sband || !src_sband) |
|
continue; |
|
|
|
for (i = 0; i < dst_sband->n_channels; i++) { |
|
dst_chan = &dst_sband->channels[i]; |
|
for (j = 0; j < src_sband->n_channels; j++) { |
|
src_chan = &src_sband->channels[j]; |
|
reg_copy_dfs_chan_state(dst_chan, src_chan); |
|
} |
|
} |
|
} |
|
} |
|
|
|
static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
|
|
ASSERT_RTNL(); |
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
|
if (wiphy == &rdev->wiphy) |
|
continue; |
|
wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy); |
|
} |
|
} |
|
|
|
/* This processes *all* regulatory hints */ |
|
static void reg_process_hint(struct regulatory_request *reg_request) |
|
{ |
|
struct wiphy *wiphy = NULL; |
|
enum reg_request_treatment treatment; |
|
enum nl80211_reg_initiator initiator = reg_request->initiator; |
|
|
|
if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
|
wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
|
|
|
switch (initiator) { |
|
case NL80211_REGDOM_SET_BY_CORE: |
|
treatment = reg_process_hint_core(reg_request); |
|
break; |
|
case NL80211_REGDOM_SET_BY_USER: |
|
treatment = reg_process_hint_user(reg_request); |
|
break; |
|
case NL80211_REGDOM_SET_BY_DRIVER: |
|
if (!wiphy) |
|
goto out_free; |
|
treatment = reg_process_hint_driver(wiphy, reg_request); |
|
break; |
|
case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
|
if (!wiphy) |
|
goto out_free; |
|
treatment = reg_process_hint_country_ie(wiphy, reg_request); |
|
break; |
|
default: |
|
WARN(1, "invalid initiator %d\n", initiator); |
|
goto out_free; |
|
} |
|
|
|
if (treatment == REG_REQ_IGNORE) |
|
goto out_free; |
|
|
|
WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, |
|
"unexpected treatment value %d\n", treatment); |
|
|
|
/* This is required so that the orig_* parameters are saved. |
|
* NOTE: treatment must be set for any case that reaches here! |
|
*/ |
|
if (treatment == REG_REQ_ALREADY_SET && wiphy && |
|
wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
|
wiphy_update_regulatory(wiphy, initiator); |
|
wiphy_all_share_dfs_chan_state(wiphy); |
|
reg_check_channels(); |
|
} |
|
|
|
return; |
|
|
|
out_free: |
|
reg_free_request(reg_request); |
|
} |
|
|
|
static void notify_self_managed_wiphys(struct regulatory_request *request) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
struct wiphy *wiphy; |
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
|
wiphy = &rdev->wiphy; |
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED && |
|
request->initiator == NL80211_REGDOM_SET_BY_USER) |
|
reg_call_notifier(wiphy, request); |
|
} |
|
} |
|
|
|
/* |
|
* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* |
|
* Regulatory hints come on a first come first serve basis and we |
|
* must process each one atomically. |
|
*/ |
|
static void reg_process_pending_hints(void) |
|
{ |
|
struct regulatory_request *reg_request, *lr; |
|
|
|
lr = get_last_request(); |
|
|
|
/* When last_request->processed becomes true this will be rescheduled */ |
|
if (lr && !lr->processed) { |
|
pr_debug("Pending regulatory request, waiting for it to be processed...\n"); |
|
return; |
|
} |
|
|
|
spin_lock(®_requests_lock); |
|
|
|
if (list_empty(®_requests_list)) { |
|
spin_unlock(®_requests_lock); |
|
return; |
|
} |
|
|
|
reg_request = list_first_entry(®_requests_list, |
|
struct regulatory_request, |
|
list); |
|
list_del_init(®_request->list); |
|
|
|
spin_unlock(®_requests_lock); |
|
|
|
notify_self_managed_wiphys(reg_request); |
|
|
|
reg_process_hint(reg_request); |
|
|
|
lr = get_last_request(); |
|
|
|
spin_lock(®_requests_lock); |
|
if (!list_empty(®_requests_list) && lr && lr->processed) |
|
schedule_work(®_work); |
|
spin_unlock(®_requests_lock); |
|
} |
|
|
|
/* Processes beacon hints -- this has nothing to do with country IEs */ |
|
static void reg_process_pending_beacon_hints(void) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
struct reg_beacon *pending_beacon, *tmp; |
|
|
|
/* This goes through the _pending_ beacon list */ |
|
spin_lock_bh(®_pending_beacons_lock); |
|
|
|
list_for_each_entry_safe(pending_beacon, tmp, |
|
®_pending_beacons, list) { |
|
list_del_init(&pending_beacon->list); |
|
|
|
/* Applies the beacon hint to current wiphys */ |
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
|
wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); |
|
|
|
/* Remembers the beacon hint for new wiphys or reg changes */ |
|
list_add_tail(&pending_beacon->list, ®_beacon_list); |
|
} |
|
|
|
spin_unlock_bh(®_pending_beacons_lock); |
|
} |
|
|
|
static void reg_process_self_managed_hint(struct wiphy *wiphy) |
|
{ |
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
|
const struct ieee80211_regdomain *tmp; |
|
const struct ieee80211_regdomain *regd; |
|
enum nl80211_band band; |
|
struct regulatory_request request = {}; |
|
|
|
ASSERT_RTNL(); |
|
lockdep_assert_wiphy(wiphy); |
|
|
|
spin_lock(®_requests_lock); |
|
regd = rdev->requested_regd; |
|
rdev->requested_regd = NULL; |
|
spin_unlock(®_requests_lock); |
|
|
|
if (!regd) |
|
return; |
|
|
|
tmp = get_wiphy_regdom(wiphy); |
|
rcu_assign_pointer(wiphy->regd, regd); |
|
rcu_free_regdom(tmp); |
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) |
|
handle_band_custom(wiphy, wiphy->bands[band], regd); |
|
|
|
reg_process_ht_flags(wiphy); |
|
|
|
request.wiphy_idx = get_wiphy_idx(wiphy); |
|
request.alpha2[0] = regd->alpha2[0]; |
|
request.alpha2[1] = regd->alpha2[1]; |
|
request.initiator = NL80211_REGDOM_SET_BY_DRIVER; |
|
|
|
nl80211_send_wiphy_reg_change_event(&request); |
|
} |
|
|
|
static void reg_process_self_managed_hints(void) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
|
|
ASSERT_RTNL(); |
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
|
wiphy_lock(&rdev->wiphy); |
|
reg_process_self_managed_hint(&rdev->wiphy); |
|
wiphy_unlock(&rdev->wiphy); |
|
} |
|
|
|
reg_check_channels(); |
|
} |
|
|
|
static void reg_todo(struct work_struct *work) |
|
{ |
|
rtnl_lock(); |
|
reg_process_pending_hints(); |
|
reg_process_pending_beacon_hints(); |
|
reg_process_self_managed_hints(); |
|
rtnl_unlock(); |
|
} |
|
|
|
static void queue_regulatory_request(struct regulatory_request *request) |
|
{ |
|
request->alpha2[0] = toupper(request->alpha2[0]); |
|
request->alpha2[1] = toupper(request->alpha2[1]); |
|
|
|
spin_lock(®_requests_lock); |
|
list_add_tail(&request->list, ®_requests_list); |
|
spin_unlock(®_requests_lock); |
|
|
|
schedule_work(®_work); |
|
} |
|
|
|
/* |
|
* Core regulatory hint -- happens during cfg80211_init() |
|
* and when we restore regulatory settings. |
|
*/ |
|
static int regulatory_hint_core(const char *alpha2) |
|
{ |
|
struct regulatory_request *request; |
|
|
|
request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
|
if (!request) |
|
return -ENOMEM; |
|
|
|
request->alpha2[0] = alpha2[0]; |
|
request->alpha2[1] = alpha2[1]; |
|
request->initiator = NL80211_REGDOM_SET_BY_CORE; |
|
request->wiphy_idx = WIPHY_IDX_INVALID; |
|
|
|
queue_regulatory_request(request); |
|
|
|
return 0; |
|
} |
|
|
|
/* User hints */ |
|
int regulatory_hint_user(const char *alpha2, |
|
enum nl80211_user_reg_hint_type user_reg_hint_type) |
|
{ |
|
struct regulatory_request *request; |
|
|
|
if (WARN_ON(!alpha2)) |
|
return -EINVAL; |
|
|
|
if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2)) |
|
return -EINVAL; |
|
|
|
request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
|
if (!request) |
|
return -ENOMEM; |
|
|
|
request->wiphy_idx = WIPHY_IDX_INVALID; |
|
request->alpha2[0] = alpha2[0]; |
|
request->alpha2[1] = alpha2[1]; |
|
request->initiator = NL80211_REGDOM_SET_BY_USER; |
|
request->user_reg_hint_type = user_reg_hint_type; |
|
|
|
/* Allow calling CRDA again */ |
|
reset_crda_timeouts(); |
|
|
|
queue_regulatory_request(request); |
|
|
|
return 0; |
|
} |
|
|
|
int regulatory_hint_indoor(bool is_indoor, u32 portid) |
|
{ |
|
spin_lock(®_indoor_lock); |
|
|
|
/* It is possible that more than one user space process is trying to |
|
* configure the indoor setting. To handle such cases, clear the indoor |
|
* setting in case that some process does not think that the device |
|
* is operating in an indoor environment. In addition, if a user space |
|
* process indicates that it is controlling the indoor setting, save its |
|
* portid, i.e., make it the owner. |
|
*/ |
|
reg_is_indoor = is_indoor; |
|
if (reg_is_indoor) { |
|
if (!reg_is_indoor_portid) |
|
reg_is_indoor_portid = portid; |
|
} else { |
|
reg_is_indoor_portid = 0; |
|
} |
|
|
|
spin_unlock(®_indoor_lock); |
|
|
|
if (!is_indoor) |
|
reg_check_channels(); |
|
|
|
return 0; |
|
} |
|
|
|
void regulatory_netlink_notify(u32 portid) |
|
{ |
|
spin_lock(®_indoor_lock); |
|
|
|
if (reg_is_indoor_portid != portid) { |
|
spin_unlock(®_indoor_lock); |
|
return; |
|
} |
|
|
|
reg_is_indoor = false; |
|
reg_is_indoor_portid = 0; |
|
|
|
spin_unlock(®_indoor_lock); |
|
|
|
reg_check_channels(); |
|
} |
|
|
|
/* Driver hints */ |
|
int regulatory_hint(struct wiphy *wiphy, const char *alpha2) |
|
{ |
|
struct regulatory_request *request; |
|
|
|
if (WARN_ON(!alpha2 || !wiphy)) |
|
return -EINVAL; |
|
|
|
wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
|
|
|
request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
|
if (!request) |
|
return -ENOMEM; |
|
|
|
request->wiphy_idx = get_wiphy_idx(wiphy); |
|
|
|
request->alpha2[0] = alpha2[0]; |
|
request->alpha2[1] = alpha2[1]; |
|
request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
|
|
|
/* Allow calling CRDA again */ |
|
reset_crda_timeouts(); |
|
|
|
queue_regulatory_request(request); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(regulatory_hint); |
|
|
|
void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band, |
|
const u8 *country_ie, u8 country_ie_len) |
|
{ |
|
char alpha2[2]; |
|
enum environment_cap env = ENVIRON_ANY; |
|
struct regulatory_request *request = NULL, *lr; |
|
|
|
/* IE len must be evenly divisible by 2 */ |
|
if (country_ie_len & 0x01) |
|
return; |
|
|
|
if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
|
return; |
|
|
|
request = kzalloc(sizeof(*request), GFP_KERNEL); |
|
if (!request) |
|
return; |
|
|
|
alpha2[0] = country_ie[0]; |
|
alpha2[1] = country_ie[1]; |
|
|
|
if (country_ie[2] == 'I') |
|
env = ENVIRON_INDOOR; |
|
else if (country_ie[2] == 'O') |
|
env = ENVIRON_OUTDOOR; |
|
|
|
rcu_read_lock(); |
|
lr = get_last_request(); |
|
|
|
if (unlikely(!lr)) |
|
goto out; |
|
|
|
/* |
|
* We will run this only upon a successful connection on cfg80211. |
|
* We leave conflict resolution to the workqueue, where can hold |
|
* the RTNL. |
|
*/ |
|
if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
|
lr->wiphy_idx != WIPHY_IDX_INVALID) |
|
goto out; |
|
|
|
request->wiphy_idx = get_wiphy_idx(wiphy); |
|
request->alpha2[0] = alpha2[0]; |
|
request->alpha2[1] = alpha2[1]; |
|
request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
|
request->country_ie_env = env; |
|
|
|
/* Allow calling CRDA again */ |
|
reset_crda_timeouts(); |
|
|
|
queue_regulatory_request(request); |
|
request = NULL; |
|
out: |
|
kfree(request); |
|
rcu_read_unlock(); |
|
} |
|
|
|
static void restore_alpha2(char *alpha2, bool reset_user) |
|
{ |
|
/* indicates there is no alpha2 to consider for restoration */ |
|
alpha2[0] = '9'; |
|
alpha2[1] = '7'; |
|
|
|
/* The user setting has precedence over the module parameter */ |
|
if (is_user_regdom_saved()) { |
|
/* Unless we're asked to ignore it and reset it */ |
|
if (reset_user) { |
|
pr_debug("Restoring regulatory settings including user preference\n"); |
|
user_alpha2[0] = '9'; |
|
user_alpha2[1] = '7'; |
|
|
|
/* |
|
* If we're ignoring user settings, we still need to |
|
* check the module parameter to ensure we put things |
|
* back as they were for a full restore. |
|
*/ |
|
if (!is_world_regdom(ieee80211_regdom)) { |
|
pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
|
ieee80211_regdom[0], ieee80211_regdom[1]); |
|
alpha2[0] = ieee80211_regdom[0]; |
|
alpha2[1] = ieee80211_regdom[1]; |
|
} |
|
} else { |
|
pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n", |
|
user_alpha2[0], user_alpha2[1]); |
|
alpha2[0] = user_alpha2[0]; |
|
alpha2[1] = user_alpha2[1]; |
|
} |
|
} else if (!is_world_regdom(ieee80211_regdom)) { |
|
pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
|
ieee80211_regdom[0], ieee80211_regdom[1]); |
|
alpha2[0] = ieee80211_regdom[0]; |
|
alpha2[1] = ieee80211_regdom[1]; |
|
} else |
|
pr_debug("Restoring regulatory settings\n"); |
|
} |
|
|
|
static void restore_custom_reg_settings(struct wiphy *wiphy) |
|
{ |
|
struct ieee80211_supported_band *sband; |
|
enum nl80211_band band; |
|
struct ieee80211_channel *chan; |
|
int i; |
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) { |
|
sband = wiphy->bands[band]; |
|
if (!sband) |
|
continue; |
|
for (i = 0; i < sband->n_channels; i++) { |
|
chan = &sband->channels[i]; |
|
chan->flags = chan->orig_flags; |
|
chan->max_antenna_gain = chan->orig_mag; |
|
chan->max_power = chan->orig_mpwr; |
|
chan->beacon_found = false; |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* Restoring regulatory settings involves ignoring any |
|
* possibly stale country IE information and user regulatory |
|
* settings if so desired, this includes any beacon hints |
|
* learned as we could have traveled outside to another country |
|
* after disconnection. To restore regulatory settings we do |
|
* exactly what we did at bootup: |
|
* |
|
* - send a core regulatory hint |
|
* - send a user regulatory hint if applicable |
|
* |
|
* Device drivers that send a regulatory hint for a specific country |
|
* keep their own regulatory domain on wiphy->regd so that does |
|
* not need to be remembered. |
|
*/ |
|
static void restore_regulatory_settings(bool reset_user, bool cached) |
|
{ |
|
char alpha2[2]; |
|
char world_alpha2[2]; |
|
struct reg_beacon *reg_beacon, *btmp; |
|
LIST_HEAD(tmp_reg_req_list); |
|
struct cfg80211_registered_device *rdev; |
|
|
|
ASSERT_RTNL(); |
|
|
|
/* |
|
* Clear the indoor setting in case that it is not controlled by user |
|
* space, as otherwise there is no guarantee that the device is still |
|
* operating in an indoor environment. |
|
*/ |
|
spin_lock(®_indoor_lock); |
|
if (reg_is_indoor && !reg_is_indoor_portid) { |
|
reg_is_indoor = false; |
|
reg_check_channels(); |
|
} |
|
spin_unlock(®_indoor_lock); |
|
|
|
reset_regdomains(true, &world_regdom); |
|
restore_alpha2(alpha2, reset_user); |
|
|
|
/* |
|
* If there's any pending requests we simply |
|
* stash them to a temporary pending queue and |
|
* add then after we've restored regulatory |
|
* settings. |
|
*/ |
|
spin_lock(®_requests_lock); |
|
list_splice_tail_init(®_requests_list, &tmp_reg_req_list); |
|
spin_unlock(®_requests_lock); |
|
|
|
/* Clear beacon hints */ |
|
spin_lock_bh(®_pending_beacons_lock); |
|
list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
|
list_del(®_beacon->list); |
|
kfree(reg_beacon); |
|
} |
|
spin_unlock_bh(®_pending_beacons_lock); |
|
|
|
list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
|
list_del(®_beacon->list); |
|
kfree(reg_beacon); |
|
} |
|
|
|
/* First restore to the basic regulatory settings */ |
|
world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
|
world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; |
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
|
if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
|
continue; |
|
if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
|
restore_custom_reg_settings(&rdev->wiphy); |
|
} |
|
|
|
if (cached && (!is_an_alpha2(alpha2) || |
|
!IS_ERR_OR_NULL(cfg80211_user_regdom))) { |
|
reset_regdomains(false, cfg80211_world_regdom); |
|
update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE); |
|
print_regdomain(get_cfg80211_regdom()); |
|
nl80211_send_reg_change_event(&core_request_world); |
|
reg_set_request_processed(); |
|
|
|
if (is_an_alpha2(alpha2) && |
|
!regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) { |
|
struct regulatory_request *ureq; |
|
|
|
spin_lock(®_requests_lock); |
|
ureq = list_last_entry(®_requests_list, |
|
struct regulatory_request, |
|
list); |
|
list_del(&ureq->list); |
|
spin_unlock(®_requests_lock); |
|
|
|
notify_self_managed_wiphys(ureq); |
|
reg_update_last_request(ureq); |
|
set_regdom(reg_copy_regd(cfg80211_user_regdom), |
|
REGD_SOURCE_CACHED); |
|
} |
|
} else { |
|
regulatory_hint_core(world_alpha2); |
|
|
|
/* |
|
* This restores the ieee80211_regdom module parameter |
|
* preference or the last user requested regulatory |
|
* settings, user regulatory settings takes precedence. |
|
*/ |
|
if (is_an_alpha2(alpha2)) |
|
regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); |
|
} |
|
|
|
spin_lock(®_requests_lock); |
|
list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
|
spin_unlock(®_requests_lock); |
|
|
|
pr_debug("Kicking the queue\n"); |
|
|
|
schedule_work(®_work); |
|
} |
|
|
|
static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
struct wireless_dev *wdev; |
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
|
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
|
wdev_lock(wdev); |
|
if (!(wdev->wiphy->regulatory_flags & flag)) { |
|
wdev_unlock(wdev); |
|
return false; |
|
} |
|
wdev_unlock(wdev); |
|
} |
|
} |
|
|
|
return true; |
|
} |
|
|
|
void regulatory_hint_disconnect(void) |
|
{ |
|
/* Restore of regulatory settings is not required when wiphy(s) |
|
* ignore IE from connected access point but clearance of beacon hints |
|
* is required when wiphy(s) supports beacon hints. |
|
*/ |
|
if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) { |
|
struct reg_beacon *reg_beacon, *btmp; |
|
|
|
if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS)) |
|
return; |
|
|
|
spin_lock_bh(®_pending_beacons_lock); |
|
list_for_each_entry_safe(reg_beacon, btmp, |
|
®_pending_beacons, list) { |
|
list_del(®_beacon->list); |
|
kfree(reg_beacon); |
|
} |
|
spin_unlock_bh(®_pending_beacons_lock); |
|
|
|
list_for_each_entry_safe(reg_beacon, btmp, |
|
®_beacon_list, list) { |
|
list_del(®_beacon->list); |
|
kfree(reg_beacon); |
|
} |
|
|
|
return; |
|
} |
|
|
|
pr_debug("All devices are disconnected, going to restore regulatory settings\n"); |
|
restore_regulatory_settings(false, true); |
|
} |
|
|
|
static bool freq_is_chan_12_13_14(u32 freq) |
|
{ |
|
if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) || |
|
freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) || |
|
freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ)) |
|
return true; |
|
return false; |
|
} |
|
|
|
static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
|
{ |
|
struct reg_beacon *pending_beacon; |
|
|
|
list_for_each_entry(pending_beacon, ®_pending_beacons, list) |
|
if (ieee80211_channel_equal(beacon_chan, |
|
&pending_beacon->chan)) |
|
return true; |
|
return false; |
|
} |
|
|
|
int regulatory_hint_found_beacon(struct wiphy *wiphy, |
|
struct ieee80211_channel *beacon_chan, |
|
gfp_t gfp) |
|
{ |
|
struct reg_beacon *reg_beacon; |
|
bool processing; |
|
|
|
if (beacon_chan->beacon_found || |
|
beacon_chan->flags & IEEE80211_CHAN_RADAR || |
|
(beacon_chan->band == NL80211_BAND_2GHZ && |
|
!freq_is_chan_12_13_14(beacon_chan->center_freq))) |
|
return 0; |
|
|
|
spin_lock_bh(®_pending_beacons_lock); |
|
processing = pending_reg_beacon(beacon_chan); |
|
spin_unlock_bh(®_pending_beacons_lock); |
|
|
|
if (processing) |
|
return 0; |
|
|
|
reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); |
|
if (!reg_beacon) |
|
return -ENOMEM; |
|
|
|
pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n", |
|
beacon_chan->center_freq, beacon_chan->freq_offset, |
|
ieee80211_freq_khz_to_channel( |
|
ieee80211_channel_to_khz(beacon_chan)), |
|
wiphy_name(wiphy)); |
|
|
|
memcpy(®_beacon->chan, beacon_chan, |
|
sizeof(struct ieee80211_channel)); |
|
|
|
/* |
|
* Since we can be called from BH or and non-BH context |
|
* we must use spin_lock_bh() |
|
*/ |
|
spin_lock_bh(®_pending_beacons_lock); |
|
list_add_tail(®_beacon->list, ®_pending_beacons); |
|
spin_unlock_bh(®_pending_beacons_lock); |
|
|
|
schedule_work(®_work); |
|
|
|
return 0; |
|
} |
|
|
|
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; |
|
char bw[32], cac_time[32]; |
|
|
|
pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\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; |
|
|
|
if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
|
snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO", |
|
freq_range->max_bandwidth_khz, |
|
reg_get_max_bandwidth(rd, reg_rule)); |
|
else |
|
snprintf(bw, sizeof(bw), "%d KHz", |
|
freq_range->max_bandwidth_khz); |
|
|
|
if (reg_rule->flags & NL80211_RRF_DFS) |
|
scnprintf(cac_time, sizeof(cac_time), "%u s", |
|
reg_rule->dfs_cac_ms/1000); |
|
else |
|
scnprintf(cac_time, sizeof(cac_time), "N/A"); |
|
|
|
|
|
/* |
|
* There may not be documentation for max antenna gain |
|
* in certain regions |
|
*/ |
|
if (power_rule->max_antenna_gain) |
|
pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
|
freq_range->start_freq_khz, |
|
freq_range->end_freq_khz, |
|
bw, |
|
power_rule->max_antenna_gain, |
|
power_rule->max_eirp, |
|
cac_time); |
|
else |
|
pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
|
freq_range->start_freq_khz, |
|
freq_range->end_freq_khz, |
|
bw, |
|
power_rule->max_eirp, |
|
cac_time); |
|
} |
|
} |
|
|
|
bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
|
{ |
|
switch (dfs_region) { |
|
case NL80211_DFS_UNSET: |
|
case NL80211_DFS_FCC: |
|
case NL80211_DFS_ETSI: |
|
case NL80211_DFS_JP: |
|
return true; |
|
default: |
|
pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region); |
|
return false; |
|
} |
|
} |
|
|
|
static void print_regdomain(const struct ieee80211_regdomain *rd) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
if (is_intersected_alpha2(rd->alpha2)) { |
|
if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
|
struct cfg80211_registered_device *rdev; |
|
rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
|
if (rdev) { |
|
pr_debug("Current regulatory domain updated by AP to: %c%c\n", |
|
rdev->country_ie_alpha2[0], |
|
rdev->country_ie_alpha2[1]); |
|
} else |
|
pr_debug("Current regulatory domain intersected:\n"); |
|
} else |
|
pr_debug("Current regulatory domain intersected:\n"); |
|
} else if (is_world_regdom(rd->alpha2)) { |
|
pr_debug("World regulatory domain updated:\n"); |
|
} else { |
|
if (is_unknown_alpha2(rd->alpha2)) |
|
pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
|
else { |
|
if (reg_request_cell_base(lr)) |
|
pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n", |
|
rd->alpha2[0], rd->alpha2[1]); |
|
else |
|
pr_debug("Regulatory domain changed to country: %c%c\n", |
|
rd->alpha2[0], rd->alpha2[1]); |
|
} |
|
} |
|
|
|
pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
|
print_rd_rules(rd); |
|
} |
|
|
|
static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
|
{ |
|
pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
|
print_rd_rules(rd); |
|
} |
|
|
|
static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
|
{ |
|
if (!is_world_regdom(rd->alpha2)) |
|
return -EINVAL; |
|
update_world_regdomain(rd); |
|
return 0; |
|
} |
|
|
|
static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
|
struct regulatory_request *user_request) |
|
{ |
|
const struct ieee80211_regdomain *intersected_rd = NULL; |
|
|
|
if (!regdom_changes(rd->alpha2)) |
|
return -EALREADY; |
|
|
|
if (!is_valid_rd(rd)) { |
|
pr_err("Invalid regulatory domain detected: %c%c\n", |
|
rd->alpha2[0], rd->alpha2[1]); |
|
print_regdomain_info(rd); |
|
return -EINVAL; |
|
} |
|
|
|
if (!user_request->intersect) { |
|
reset_regdomains(false, rd); |
|
return 0; |
|
} |
|
|
|
intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
|
if (!intersected_rd) |
|
return -EINVAL; |
|
|
|
kfree(rd); |
|
rd = NULL; |
|
reset_regdomains(false, intersected_rd); |
|
|
|
return 0; |
|
} |
|
|
|
static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
|
struct regulatory_request *driver_request) |
|
{ |
|
const struct ieee80211_regdomain *regd; |
|
const struct ieee80211_regdomain *intersected_rd = NULL; |
|
const struct ieee80211_regdomain *tmp; |
|
struct wiphy *request_wiphy; |
|
|
|
if (is_world_regdom(rd->alpha2)) |
|
return -EINVAL; |
|
|
|
if (!regdom_changes(rd->alpha2)) |
|
return -EALREADY; |
|
|
|
if (!is_valid_rd(rd)) { |
|
pr_err("Invalid regulatory domain detected: %c%c\n", |
|
rd->alpha2[0], rd->alpha2[1]); |
|
print_regdomain_info(rd); |
|
return -EINVAL; |
|
} |
|
|
|
request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
|
if (!request_wiphy) |
|
return -ENODEV; |
|
|
|
if (!driver_request->intersect) { |
|
ASSERT_RTNL(); |
|
wiphy_lock(request_wiphy); |
|
if (request_wiphy->regd) { |
|
wiphy_unlock(request_wiphy); |
|
return -EALREADY; |
|
} |
|
|
|
regd = reg_copy_regd(rd); |
|
if (IS_ERR(regd)) { |
|
wiphy_unlock(request_wiphy); |
|
return PTR_ERR(regd); |
|
} |
|
|
|
rcu_assign_pointer(request_wiphy->regd, regd); |
|
wiphy_unlock(request_wiphy); |
|
reset_regdomains(false, rd); |
|
return 0; |
|
} |
|
|
|
intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
|
if (!intersected_rd) |
|
return -EINVAL; |
|
|
|
/* |
|
* We can trash what CRDA provided now. |
|
* However if a driver requested this specific regulatory |
|
* domain we keep it for its private use |
|
*/ |
|
tmp = get_wiphy_regdom(request_wiphy); |
|
rcu_assign_pointer(request_wiphy->regd, rd); |
|
rcu_free_regdom(tmp); |
|
|
|
rd = NULL; |
|
|
|
reset_regdomains(false, intersected_rd); |
|
|
|
return 0; |
|
} |
|
|
|
static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
|
struct regulatory_request *country_ie_request) |
|
{ |
|
struct wiphy *request_wiphy; |
|
|
|
if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
|
!is_unknown_alpha2(rd->alpha2)) |
|
return -EINVAL; |
|
|
|
/* |
|
* Lets only bother proceeding on the same alpha2 if the current |
|
* rd is non static (it means CRDA was present and was used last) |
|
* and the pending request came in from a country IE |
|
*/ |
|
|
|
if (!is_valid_rd(rd)) { |
|
pr_err("Invalid regulatory domain detected: %c%c\n", |
|
rd->alpha2[0], rd->alpha2[1]); |
|
print_regdomain_info(rd); |
|
return -EINVAL; |
|
} |
|
|
|
request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
|
if (!request_wiphy) |
|
return -ENODEV; |
|
|
|
if (country_ie_request->intersect) |
|
return -EINVAL; |
|
|
|
reset_regdomains(false, rd); |
|
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. |
|
*/ |
|
int set_regdom(const struct ieee80211_regdomain *rd, |
|
enum ieee80211_regd_source regd_src) |
|
{ |
|
struct regulatory_request *lr; |
|
bool user_reset = false; |
|
int r; |
|
|
|
if (IS_ERR_OR_NULL(rd)) |
|
return -ENODATA; |
|
|
|
if (!reg_is_valid_request(rd->alpha2)) { |
|
kfree(rd); |
|
return -EINVAL; |
|
} |
|
|
|
if (regd_src == REGD_SOURCE_CRDA) |
|
reset_crda_timeouts(); |
|
|
|
lr = get_last_request(); |
|
|
|
/* Note that this doesn't update the wiphys, this is done below */ |
|
switch (lr->initiator) { |
|
case NL80211_REGDOM_SET_BY_CORE: |
|
r = reg_set_rd_core(rd); |
|
break; |
|
case NL80211_REGDOM_SET_BY_USER: |
|
cfg80211_save_user_regdom(rd); |
|
r = reg_set_rd_user(rd, lr); |
|
user_reset = true; |
|
break; |
|
case NL80211_REGDOM_SET_BY_DRIVER: |
|
r = reg_set_rd_driver(rd, lr); |
|
break; |
|
case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
|
r = reg_set_rd_country_ie(rd, lr); |
|
break; |
|
default: |
|
WARN(1, "invalid initiator %d\n", lr->initiator); |
|
kfree(rd); |
|
return -EINVAL; |
|
} |
|
|
|
if (r) { |
|
switch (r) { |
|
case -EALREADY: |
|
reg_set_request_processed(); |
|
break; |
|
default: |
|
/* Back to world regulatory in case of errors */ |
|
restore_regulatory_settings(user_reset, false); |
|
} |
|
|
|
kfree(rd); |
|
return r; |
|
} |
|
|
|
/* This would make this whole thing pointless */ |
|
if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
|
return -EINVAL; |
|
|
|
/* update all wiphys now with the new established regulatory domain */ |
|
update_all_wiphy_regulatory(lr->initiator); |
|
|
|
print_regdomain(get_cfg80211_regdom()); |
|
|
|
nl80211_send_reg_change_event(lr); |
|
|
|
reg_set_request_processed(); |
|
|
|
return 0; |
|
} |
|
|
|
static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
|
struct ieee80211_regdomain *rd) |
|
{ |
|
const struct ieee80211_regdomain *regd; |
|
const struct ieee80211_regdomain *prev_regd; |
|
struct cfg80211_registered_device *rdev; |
|
|
|
if (WARN_ON(!wiphy || !rd)) |
|
return -EINVAL; |
|
|
|
if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), |
|
"wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) |
|
return -EPERM; |
|
|
|
if (WARN(!is_valid_rd(rd), |
|
"Invalid regulatory domain detected: %c%c\n", |
|
rd->alpha2[0], rd->alpha2[1])) { |
|
print_regdomain_info(rd); |
|
return -EINVAL; |
|
} |
|
|
|
regd = reg_copy_regd(rd); |
|
if (IS_ERR(regd)) |
|
return PTR_ERR(regd); |
|
|
|
rdev = wiphy_to_rdev(wiphy); |
|
|
|
spin_lock(®_requests_lock); |
|
prev_regd = rdev->requested_regd; |
|
rdev->requested_regd = regd; |
|
spin_unlock(®_requests_lock); |
|
|
|
kfree(prev_regd); |
|
return 0; |
|
} |
|
|
|
int regulatory_set_wiphy_regd(struct wiphy *wiphy, |
|
struct ieee80211_regdomain *rd) |
|
{ |
|
int ret = __regulatory_set_wiphy_regd(wiphy, rd); |
|
|
|
if (ret) |
|
return ret; |
|
|
|
schedule_work(®_work); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(regulatory_set_wiphy_regd); |
|
|
|
int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy, |
|
struct ieee80211_regdomain *rd) |
|
{ |
|
int ret; |
|
|
|
ASSERT_RTNL(); |
|
|
|
ret = __regulatory_set_wiphy_regd(wiphy, rd); |
|
if (ret) |
|
return ret; |
|
|
|
/* process the request immediately */ |
|
reg_process_self_managed_hint(wiphy); |
|
reg_check_channels(); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync); |
|
|
|
void wiphy_regulatory_register(struct wiphy *wiphy) |
|
{ |
|
struct regulatory_request *lr = get_last_request(); |
|
|
|
/* self-managed devices ignore beacon hints and country IE */ |
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
|
wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | |
|
REGULATORY_COUNTRY_IE_IGNORE; |
|
|
|
/* |
|
* The last request may have been received before this |
|
* registration call. Call the driver notifier if |
|
* initiator is USER. |
|
*/ |
|
if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
|
reg_call_notifier(wiphy, lr); |
|
} |
|
|
|
if (!reg_dev_ignore_cell_hint(wiphy)) |
|
reg_num_devs_support_basehint++; |
|
|
|
wiphy_update_regulatory(wiphy, lr->initiator); |
|
wiphy_all_share_dfs_chan_state(wiphy); |
|
reg_process_self_managed_hints(); |
|
} |
|
|
|
void wiphy_regulatory_deregister(struct wiphy *wiphy) |
|
{ |
|
struct wiphy *request_wiphy = NULL; |
|
struct regulatory_request *lr; |
|
|
|
lr = get_last_request(); |
|
|
|
if (!reg_dev_ignore_cell_hint(wiphy)) |
|
reg_num_devs_support_basehint--; |
|
|
|
rcu_free_regdom(get_wiphy_regdom(wiphy)); |
|
RCU_INIT_POINTER(wiphy->regd, NULL); |
|
|
|
if (lr) |
|
request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
|
|
|
if (!request_wiphy || request_wiphy != wiphy) |
|
return; |
|
|
|
lr->wiphy_idx = WIPHY_IDX_INVALID; |
|
lr->country_ie_env = ENVIRON_ANY; |
|
} |
|
|
|
/* |
|
* See FCC notices for UNII band definitions |
|
* 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii |
|
* 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0 |
|
*/ |
|
int cfg80211_get_unii(int freq) |
|
{ |
|
/* UNII-1 */ |
|
if (freq >= 5150 && freq <= 5250) |
|
return 0; |
|
|
|
/* UNII-2A */ |
|
if (freq > 5250 && freq <= 5350) |
|
return 1; |
|
|
|
/* UNII-2B */ |
|
if (freq > 5350 && freq <= 5470) |
|
return 2; |
|
|
|
/* UNII-2C */ |
|
if (freq > 5470 && freq <= 5725) |
|
return 3; |
|
|
|
/* UNII-3 */ |
|
if (freq > 5725 && freq <= 5825) |
|
return 4; |
|
|
|
/* UNII-5 */ |
|
if (freq > 5925 && freq <= 6425) |
|
return 5; |
|
|
|
/* UNII-6 */ |
|
if (freq > 6425 && freq <= 6525) |
|
return 6; |
|
|
|
/* UNII-7 */ |
|
if (freq > 6525 && freq <= 6875) |
|
return 7; |
|
|
|
/* UNII-8 */ |
|
if (freq > 6875 && freq <= 7125) |
|
return 8; |
|
|
|
return -EINVAL; |
|
} |
|
|
|
bool regulatory_indoor_allowed(void) |
|
{ |
|
return reg_is_indoor; |
|
} |
|
|
|
bool regulatory_pre_cac_allowed(struct wiphy *wiphy) |
|
{ |
|
const struct ieee80211_regdomain *regd = NULL; |
|
const struct ieee80211_regdomain *wiphy_regd = NULL; |
|
bool pre_cac_allowed = false; |
|
|
|
rcu_read_lock(); |
|
|
|
regd = rcu_dereference(cfg80211_regdomain); |
|
wiphy_regd = rcu_dereference(wiphy->regd); |
|
if (!wiphy_regd) { |
|
if (regd->dfs_region == NL80211_DFS_ETSI) |
|
pre_cac_allowed = true; |
|
|
|
rcu_read_unlock(); |
|
|
|
return pre_cac_allowed; |
|
} |
|
|
|
if (regd->dfs_region == wiphy_regd->dfs_region && |
|
wiphy_regd->dfs_region == NL80211_DFS_ETSI) |
|
pre_cac_allowed = true; |
|
|
|
rcu_read_unlock(); |
|
|
|
return pre_cac_allowed; |
|
} |
|
EXPORT_SYMBOL(regulatory_pre_cac_allowed); |
|
|
|
static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev) |
|
{ |
|
struct wireless_dev *wdev; |
|
/* If we finished CAC or received radar, we should end any |
|
* CAC running on the same channels. |
|
* the check !cfg80211_chandef_dfs_usable contain 2 options: |
|
* either all channels are available - those the CAC_FINISHED |
|
* event has effected another wdev state, or there is a channel |
|
* in unavailable state in wdev chandef - those the RADAR_DETECTED |
|
* event has effected another wdev state. |
|
* In both cases we should end the CAC on the wdev. |
|
*/ |
|
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
|
if (wdev->cac_started && |
|
!cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef)) |
|
rdev_end_cac(rdev, wdev->netdev); |
|
} |
|
} |
|
|
|
void regulatory_propagate_dfs_state(struct wiphy *wiphy, |
|
struct cfg80211_chan_def *chandef, |
|
enum nl80211_dfs_state dfs_state, |
|
enum nl80211_radar_event event) |
|
{ |
|
struct cfg80211_registered_device *rdev; |
|
|
|
ASSERT_RTNL(); |
|
|
|
if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
|
return; |
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
|
if (wiphy == &rdev->wiphy) |
|
continue; |
|
|
|
if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) |
|
continue; |
|
|
|
if (!ieee80211_get_channel(&rdev->wiphy, |
|
chandef->chan->center_freq)) |
|
continue; |
|
|
|
cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state); |
|
|
|
if (event == NL80211_RADAR_DETECTED || |
|
event == NL80211_RADAR_CAC_FINISHED) { |
|
cfg80211_sched_dfs_chan_update(rdev); |
|
cfg80211_check_and_end_cac(rdev); |
|
} |
|
|
|
nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL); |
|
} |
|
} |
|
|
|
static int __init regulatory_init_db(void) |
|
{ |
|
int err; |
|
|
|
/* |
|
* It's possible that - due to other bugs/issues - cfg80211 |
|
* never called regulatory_init() below, or that it failed; |
|
* in that case, don't try to do any further work here as |
|
* it's doomed to lead to crashes. |
|
*/ |
|
if (IS_ERR_OR_NULL(reg_pdev)) |
|
return -EINVAL; |
|
|
|
err = load_builtin_regdb_keys(); |
|
if (err) |
|
return err; |
|
|
|
/* We always try to get an update for the static regdomain */ |
|
err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
|
if (err) { |
|
if (err == -ENOMEM) { |
|
platform_device_unregister(reg_pdev); |
|
return err; |
|
} |
|
/* |
|
* N.B. kobject_uevent_env() can fail mainly for when we're out |
|
* memory which is handled and propagated appropriately above |
|
* but it can also fail during a netlink_broadcast() or during |
|
* early boot for call_usermodehelper(). For now treat these |
|
* errors as non-fatal. |
|
*/ |
|
pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
|
} |
|
|
|
/* |
|
* Finally, if the user set the module parameter treat it |
|
* as a user hint. |
|
*/ |
|
if (!is_world_regdom(ieee80211_regdom)) |
|
regulatory_hint_user(ieee80211_regdom, |
|
NL80211_USER_REG_HINT_USER); |
|
|
|
return 0; |
|
} |
|
#ifndef MODULE |
|
late_initcall(regulatory_init_db); |
|
#endif |
|
|
|
int __init regulatory_init(void) |
|
{ |
|
reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
|
if (IS_ERR(reg_pdev)) |
|
return PTR_ERR(reg_pdev); |
|
|
|
rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
|
|
|
user_alpha2[0] = '9'; |
|
user_alpha2[1] = '7'; |
|
|
|
#ifdef MODULE |
|
return regulatory_init_db(); |
|
#else |
|
return 0; |
|
#endif |
|
} |
|
|
|
void regulatory_exit(void) |
|
{ |
|
struct regulatory_request *reg_request, *tmp; |
|
struct reg_beacon *reg_beacon, *btmp; |
|
|
|
cancel_work_sync(®_work); |
|
cancel_crda_timeout_sync(); |
|
cancel_delayed_work_sync(®_check_chans); |
|
|
|
/* Lock to suppress warnings */ |
|
rtnl_lock(); |
|
reset_regdomains(true, NULL); |
|
rtnl_unlock(); |
|
|
|
dev_set_uevent_suppress(®_pdev->dev, true); |
|
|
|
platform_device_unregister(reg_pdev); |
|
|
|
list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
|
list_del(®_beacon->list); |
|
kfree(reg_beacon); |
|
} |
|
|
|
list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
|
list_del(®_beacon->list); |
|
kfree(reg_beacon); |
|
} |
|
|
|
list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
|
list_del(®_request->list); |
|
kfree(reg_request); |
|
} |
|
|
|
if (!IS_ERR_OR_NULL(regdb)) |
|
kfree(regdb); |
|
if (!IS_ERR_OR_NULL(cfg80211_user_regdom)) |
|
kfree(cfg80211_user_regdom); |
|
|
|
free_regdb_keyring(); |
|
}
|
|
|