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-rw-r--r--net/wireless/Kconfig32
-rw-r--r--net/wireless/core.c45
-rw-r--r--net/wireless/core.h2
-rw-r--r--net/wireless/nl80211.c280
-rw-r--r--net/wireless/reg.c910
-rw-r--r--net/wireless/reg.h13
6 files changed, 1143 insertions, 139 deletions
diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index 833b024f8f6..7d82be07fa1 100644
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -14,6 +14,38 @@ config NL80211
If unsure, say Y.
+config WIRELESS_OLD_REGULATORY
+ bool "Old wireless static regulatory definitions"
+ default n
+ ---help---
+ This option enables the old static regulatory information
+ and uses it within the new framework. This is available
+ temporarily as an option to help prevent immediate issues
+ due to the switch to the new regulatory framework which
+ does require a new userspace application which has the
+ database of regulatory information (CRDA) and another for
+ setting regulatory domains (iw).
+
+ For more information see:
+
+ http://wireless.kernel.org/en/developers/Regulatory/CRDA
+ http://wireless.kernel.org/en/users/Documentation/iw
+
+ It is important to note though that if you *do* have CRDA present
+ and if this option is enabled CRDA *will* be called to update the
+ regulatory domain (for US and JP only). Support for letting the user
+ set the regulatory domain through iw is also supported. This option
+ mainly exists to leave around for a kernel release some old static
+ regulatory domains that were defined and to keep around the old
+ ieee80211_regdom module parameter. This is being phased out and you
+ should stop using them ASAP.
+
+ Say N unless you cannot install a new userspace application
+ or have one currently depending on the ieee80211_regdom module
+ parameter and cannot port it to use the new userspace interfaces.
+
+ This is scheduled for removal for 2.6.29.
+
config WIRELESS_EXT
bool "Wireless extensions"
default n
diff --git a/net/wireless/core.c b/net/wireless/core.c
index f1da0b93bc5..5cadbeb76a1 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -1,7 +1,7 @@
/*
* This is the linux wireless configuration interface.
*
- * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2006-2008 Johannes Berg <johannes@sipsolutions.net>
*/
#include <linux/if.h>
@@ -13,12 +13,14 @@
#include <linux/debugfs.h>
#include <linux/notifier.h>
#include <linux/device.h>
+#include <linux/list.h>
#include <net/genetlink.h>
#include <net/cfg80211.h>
#include <net/wireless.h>
#include "nl80211.h"
#include "core.h"
#include "sysfs.h"
+#include "reg.h"
/* name for sysfs, %d is appended */
#define PHY_NAME "phy"
@@ -32,7 +34,6 @@ MODULE_DESCRIPTION("wireless configuration support");
* often because we need to do it for each command */
LIST_HEAD(cfg80211_drv_list);
DEFINE_MUTEX(cfg80211_drv_mutex);
-static int wiphy_counter;
/* for debugfs */
static struct dentry *ieee80211_debugfs_dir;
@@ -204,6 +205,8 @@ out_unlock:
struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv)
{
+ static int wiphy_counter;
+
struct cfg80211_registered_device *drv;
int alloc_size;
@@ -220,21 +223,18 @@ struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv)
mutex_lock(&cfg80211_drv_mutex);
- drv->idx = wiphy_counter;
-
- /* now increase counter for the next device unless
- * it has wrapped previously */
- if (wiphy_counter >= 0)
- wiphy_counter++;
-
- mutex_unlock(&cfg80211_drv_mutex);
+ drv->idx = wiphy_counter++;
if (unlikely(drv->idx < 0)) {
+ wiphy_counter--;
+ mutex_unlock(&cfg80211_drv_mutex);
/* ugh, wrapped! */
kfree(drv);
return NULL;
}
+ mutex_unlock(&cfg80211_drv_mutex);
+
/* give it a proper name */
snprintf(drv->wiphy.dev.bus_id, BUS_ID_SIZE,
PHY_NAME "%d", drv->idx);
@@ -259,6 +259,13 @@ int wiphy_register(struct wiphy *wiphy)
struct ieee80211_supported_band *sband;
bool have_band = false;
int i;
+ u16 ifmodes = wiphy->interface_modes;
+
+ /* sanity check ifmodes */
+ WARN_ON(!ifmodes);
+ ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
+ if (WARN_ON(ifmodes != wiphy->interface_modes))
+ wiphy->interface_modes = ifmodes;
/* sanity check supported bands/channels */
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
@@ -295,7 +302,9 @@ int wiphy_register(struct wiphy *wiphy)
ieee80211_set_bitrate_flags(wiphy);
/* set up regulatory info */
- wiphy_update_regulatory(wiphy);
+ mutex_lock(&cfg80211_reg_mutex);
+ wiphy_update_regulatory(wiphy, REGDOM_SET_BY_CORE);
+ mutex_unlock(&cfg80211_reg_mutex);
mutex_lock(&cfg80211_drv_mutex);
@@ -373,6 +382,8 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
+ WARN_ON(dev->ieee80211_ptr->iftype == NL80211_IFTYPE_UNSPECIFIED);
+
switch (state) {
case NETDEV_REGISTER:
mutex_lock(&rdev->devlist_mtx);
@@ -404,7 +415,9 @@ static struct notifier_block cfg80211_netdev_notifier = {
static int cfg80211_init(void)
{
- int err = wiphy_sysfs_init();
+ int err;
+
+ err = wiphy_sysfs_init();
if (err)
goto out_fail_sysfs;
@@ -418,8 +431,14 @@ static int cfg80211_init(void)
ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
+ err = regulatory_init();
+ if (err)
+ goto out_fail_reg;
+
return 0;
+out_fail_reg:
+ debugfs_remove(ieee80211_debugfs_dir);
out_fail_nl80211:
unregister_netdevice_notifier(&cfg80211_netdev_notifier);
out_fail_notifier:
@@ -427,6 +446,7 @@ out_fail_notifier:
out_fail_sysfs:
return err;
}
+
subsys_initcall(cfg80211_init);
static void cfg80211_exit(void)
@@ -435,5 +455,6 @@ static void cfg80211_exit(void)
nl80211_exit();
unregister_netdevice_notifier(&cfg80211_netdev_notifier);
wiphy_sysfs_exit();
+ regulatory_exit();
}
module_exit(cfg80211_exit);
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 7a02c356d63..771cc5cc765 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -79,6 +79,6 @@ extern int cfg80211_dev_rename(struct cfg80211_registered_device *drv,
char *newname);
void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
-void wiphy_update_regulatory(struct wiphy *wiphy);
+void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby);
#endif /* __NET_WIRELESS_CORE_H */
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 59eb2cf42e5..572793c8c7a 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -18,6 +18,7 @@
#include <net/cfg80211.h>
#include "core.h"
#include "nl80211.h"
+#include "reg.h"
/* the netlink family */
static struct genl_family nl80211_fam = {
@@ -87,6 +88,16 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_MESH_ID_LEN },
[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
+
+ [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
+ [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
+
+ [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
+ [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
+ [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
+
+ [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
+ .len = NL80211_HT_CAPABILITY_LEN },
};
/* message building helper */
@@ -106,10 +117,12 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
struct nlattr *nl_bands, *nl_band;
struct nlattr *nl_freqs, *nl_freq;
struct nlattr *nl_rates, *nl_rate;
+ struct nlattr *nl_modes;
enum ieee80211_band band;
struct ieee80211_channel *chan;
struct ieee80211_rate *rate;
int i;
+ u16 ifmodes = dev->wiphy.interface_modes;
hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
if (!hdr)
@@ -118,6 +131,20 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);
NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
+ nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
+ if (!nl_modes)
+ goto nla_put_failure;
+
+ i = 0;
+ while (ifmodes) {
+ if (ifmodes & 1)
+ NLA_PUT_FLAG(msg, i);
+ ifmodes >>= 1;
+ i++;
+ }
+
+ nla_nest_end(msg, nl_modes);
+
nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
if (!nl_bands)
goto nla_put_failure;
@@ -272,7 +299,7 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
- /* TODO: interface type */
+ NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
return genlmsg_end(msg, hdr);
nla_put_failure:
@@ -391,40 +418,56 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
int err, ifindex;
enum nl80211_iftype type;
struct net_device *dev;
- u32 flags;
+ u32 _flags, *flags = NULL;
memset(&params, 0, sizeof(params));
- if (info->attrs[NL80211_ATTR_IFTYPE]) {
- type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
- if (type > NL80211_IFTYPE_MAX)
- return -EINVAL;
- } else
- return -EINVAL;
-
err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
if (err)
return err;
ifindex = dev->ifindex;
+ type = dev->ieee80211_ptr->iftype;
dev_put(dev);
- if (!drv->ops->change_virtual_intf) {
+ err = -EINVAL;
+ if (info->attrs[NL80211_ATTR_IFTYPE]) {
+ type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
+ if (type > NL80211_IFTYPE_MAX)
+ goto unlock;
+ }
+
+ if (!drv->ops->change_virtual_intf ||
+ !(drv->wiphy.interface_modes & (1 << type))) {
err = -EOPNOTSUPP;
goto unlock;
}
- if (type == NL80211_IFTYPE_MESH_POINT &&
- info->attrs[NL80211_ATTR_MESH_ID]) {
+ if (info->attrs[NL80211_ATTR_MESH_ID]) {
+ if (type != NL80211_IFTYPE_MESH_POINT) {
+ err = -EINVAL;
+ goto unlock;
+ }
params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
}
+ if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
+ if (type != NL80211_IFTYPE_MONITOR) {
+ err = -EINVAL;
+ goto unlock;
+ }
+ err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
+ &_flags);
+ if (!err)
+ flags = &_flags;
+ }
rtnl_lock();
- err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
- info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
- &flags);
err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
- type, err ? NULL : &flags, &params);
+ type, flags, &params);
+
+ dev = __dev_get_by_index(&init_net, ifindex);
+ WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));
+
rtnl_unlock();
unlock:
@@ -455,7 +498,8 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
if (IS_ERR(drv))
return PTR_ERR(drv);
- if (!drv->ops->add_virtual_intf) {
+ if (!drv->ops->add_virtual_intf ||
+ !(drv->wiphy.interface_modes & (1 << type))) {
err = -EOPNOTSUPP;
goto unlock;
}
@@ -1125,6 +1169,10 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
params.listen_interval =
nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
+ if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
+ params.ht_capa =
+ nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
+
if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
&params.station_flags))
return -EINVAL;
@@ -1188,6 +1236,9 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
params.listen_interval =
nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
+ if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
+ params.ht_capa =
+ nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
&params.station_flags))
@@ -1525,6 +1576,183 @@ static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
return err;
}
+static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg80211_registered_device *drv;
+ int err;
+ struct net_device *dev;
+ struct bss_parameters params;
+
+ memset(&params, 0, sizeof(params));
+ /* default to not changing parameters */
+ params.use_cts_prot = -1;
+ params.use_short_preamble = -1;
+ params.use_short_slot_time = -1;
+
+ if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
+ params.use_cts_prot =
+ nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
+ if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
+ params.use_short_preamble =
+ nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
+ if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
+ params.use_short_slot_time =
+ nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
+
+ err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
+ if (err)
+ return err;
+
+ if (!drv->ops->change_bss) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ rtnl_lock();
+ err = drv->ops->change_bss(&drv->wiphy, dev, &params);
+ rtnl_unlock();
+
+ out:
+ cfg80211_put_dev(drv);
+ dev_put(dev);
+ return err;
+}
+
+static const struct nla_policy
+ reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
+ [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
+ [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
+ [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
+ [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
+ [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
+ [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
+};
+
+static int parse_reg_rule(struct nlattr *tb[],
+ struct ieee80211_reg_rule *reg_rule)
+{
+ struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
+ struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
+
+ if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
+ return -EINVAL;
+ if (!tb[NL80211_ATTR_FREQ_RANGE_START])
+ return -EINVAL;
+ if (!tb[NL80211_ATTR_FREQ_RANGE_END])
+ return -EINVAL;
+ if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
+ return -EINVAL;
+ if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
+ return -EINVAL;
+
+ reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
+
+ freq_range->start_freq_khz =
+ nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
+ freq_range->end_freq_khz =
+ nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
+ freq_range->max_bandwidth_khz =
+ nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
+
+ power_rule->max_eirp =
+ nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
+
+ if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
+ power_rule->max_antenna_gain =
+ nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
+
+ return 0;
+}
+
+static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
+{
+ int r;
+ char *data = NULL;
+
+ if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
+ return -EINVAL;
+
+ data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
+
+#ifdef CONFIG_WIRELESS_OLD_REGULATORY
+ /* We ignore world regdom requests with the old regdom setup */
+ if (is_world_regdom(data))
+ return -EINVAL;
+#endif
+ mutex_lock(&cfg80211_drv_mutex);
+ r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, NULL);
+ mutex_unlock(&cfg80211_drv_mutex);
+ return r;
+}
+
+static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
+ struct nlattr *nl_reg_rule;
+ char *alpha2 = NULL;
+ int rem_reg_rules = 0, r = 0;
+ u32 num_rules = 0, rule_idx = 0, size_of_regd;
+ struct ieee80211_regdomain *rd = NULL;
+
+ if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
+ return -EINVAL;
+
+ if (!info->attrs[NL80211_ATTR_REG_RULES])
+ return -EINVAL;
+
+ alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
+
+ nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
+ rem_reg_rules) {
+ num_rules++;
+ if (num_rules > NL80211_MAX_SUPP_REG_RULES)
+ goto bad_reg;
+ }
+
+ if (!reg_is_valid_request(alpha2))
+ return -EINVAL;
+
+ size_of_regd = sizeof(struct ieee80211_regdomain) +
+ (num_rules * sizeof(struct ieee80211_reg_rule));
+
+ rd = kzalloc(size_of_regd, GFP_KERNEL);
+ if (!rd)
+ return -ENOMEM;
+
+ rd->n_reg_rules = num_rules;
+ rd->alpha2[0] = alpha2[0];
+ rd->alpha2[1] = alpha2[1];
+
+ nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
+ rem_reg_rules) {
+ nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
+ nla_data(nl_reg_rule), nla_len(nl_reg_rule),
+ reg_rule_policy);
+ r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
+ if (r)
+ goto bad_reg;
+
+ rule_idx++;
+
+ if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
+ goto bad_reg;
+ }
+
+ BUG_ON(rule_idx != num_rules);
+
+ mutex_lock(&cfg80211_drv_mutex);
+ r = set_regdom(rd);
+ mutex_unlock(&cfg80211_drv_mutex);
+ if (r)
+ goto bad_reg;
+
+ return r;
+
+bad_reg:
+ kfree(rd);
+ return -EINVAL;
+}
+
static struct genl_ops nl80211_ops[] = {
{
.cmd = NL80211_CMD_GET_WIPHY,
@@ -1656,6 +1884,24 @@ static struct genl_ops nl80211_ops[] = {
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
+ {
+ .cmd = NL80211_CMD_SET_BSS,
+ .doit = nl80211_set_bss,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = NL80211_CMD_SET_REG,
+ .doit = nl80211_set_reg,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = NL80211_CMD_REQ_SET_REG,
+ .doit = nl80211_req_set_reg,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
};
/* multicast groups */
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 855bff4b325..626dbb68849 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2,179 +2,871 @@
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-/*
- * This regulatory domain control implementation is highly incomplete, it
- * only exists for the purpose of not regressing mac80211.
- *
- * For now, drivers can restrict the set of allowed channels by either
- * not registering those channels or setting the IEEE80211_CHAN_DISABLED
- * flag; that flag will only be *set* by this code, never *cleared.
+/**
+ * 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.
*
- * Alternatively, drivers that trust the regulatory domain control here
- * will register a complete set of capabilities and the control code
- * will restrict the set by setting the IEEE80211_CHAN_* flags.
+ * 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.
+ *
*/
#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/random.h>
+#include <linux/nl80211.h>
+#include <linux/platform_device.h>
#include <net/wireless.h>
+#include <net/cfg80211.h>
#include "core.h"
+#include "reg.h"
-static char *ieee80211_regdom = "US";
-module_param(ieee80211_regdom, charp, 0444);
-MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
-
-struct ieee80211_channel_range {
- short start_freq;
- short end_freq;
- int max_power;
- int max_antenna_gain;
- u32 flags;
+/* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */
+struct regulatory_request {
+ struct list_head list;
+ struct wiphy *wiphy;
+ int granted;
+ enum reg_set_by initiator;
+ char alpha2[2];
};
-struct ieee80211_regdomain {
- const char *code;
- const struct ieee80211_channel_range *ranges;
- int n_ranges;
+static LIST_HEAD(regulatory_requests);
+DEFINE_MUTEX(cfg80211_reg_mutex);
+
+/* To trigger userspace events */
+static struct platform_device *reg_pdev;
+
+/* Keep the ordering from large to small */
+static u32 supported_bandwidths[] = {
+ MHZ_TO_KHZ(40),
+ MHZ_TO_KHZ(20),
};
-#define RANGE_PWR(_start, _end, _pwr, _ag, _flags) \
- { _start, _end, _pwr, _ag, _flags }
+static struct list_head regulatory_requests;
+/* 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 */
+static const struct ieee80211_regdomain *cfg80211_regdomain;
-/*
- * Ideally, in the future, these definitions will be loaded from a
- * userspace table via some daemon.
- */
-static const struct ieee80211_channel_range ieee80211_US_channels[] = {
- /* IEEE 802.11b/g, channels 1..11 */
- RANGE_PWR(2412, 2462, 27, 6, 0),
- /* IEEE 802.11a, channel 36*/
- RANGE_PWR(5180, 5180, 23, 6, 0),
- /* IEEE 802.11a, channel 40*/
- RANGE_PWR(5200, 5200, 23, 6, 0),
- /* IEEE 802.11a, channel 44*/
- RANGE_PWR(5220, 5220, 23, 6, 0),
- /* IEEE 802.11a, channels 48..64 */
- RANGE_PWR(5240, 5320, 23, 6, 0),
- /* IEEE 802.11a, channels 149..165, outdoor */
- RANGE_PWR(5745, 5825, 30, 6, 0),
+/* We keep a static world regulatory domain in case of the absence of CRDA */
+static const struct ieee80211_regdomain world_regdom = {
+ .n_reg_rules = 1,
+ .alpha2 = "00",
+ .reg_rules = {
+ REG_RULE(2412-10, 2462+10, 40, 6, 20,
+ NL80211_RRF_PASSIVE_SCAN |
+ NL80211_RRF_NO_IBSS),
+ }
};
-static const struct ieee80211_channel_range ieee80211_JP_channels[] = {
- /* IEEE 802.11b/g, channels 1..14 */
- RANGE_PWR(2412, 2484, 20, 6, 0),
- /* IEEE 802.11a, channels 34..48 */
- RANGE_PWR(5170, 5240, 20, 6, IEEE80211_CHAN_PASSIVE_SCAN),
- /* IEEE 802.11a, channels 52..64 */
- RANGE_PWR(5260, 5320, 20, 6, IEEE80211_CHAN_NO_IBSS |
- IEEE80211_CHAN_RADAR),
-};
+static const struct ieee80211_regdomain *cfg80211_world_regdom =
+ &world_regdom;
+
+#ifdef CONFIG_WIRELESS_OLD_REGULATORY
+static char *ieee80211_regdom = "US";
+module_param(ieee80211_regdom, charp, 0444);
+MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
+
+/* We assume 40 MHz bandwidth for the old regulatory work.
+ * We make emphasis we are using the exact same frequencies
+ * as before */
-static const struct ieee80211_channel_range ieee80211_EU_channels[] = {
- /* IEEE 802.11b/g, channels 1..13 */
- RANGE_PWR(2412, 2472, 20, 6, 0),
- /* IEEE 802.11a, channel 36*/
- RANGE_PWR(5180, 5180, 23, 6, IEEE80211_CHAN_PASSIVE_SCAN),
- /* IEEE 802.11a, channel 40*/
- RANGE_PWR(5200, 5200, 23, 6, IEEE80211_CHAN_PASSIVE_SCAN),
- /* IEEE 802.11a, channel 44*/
- RANGE_PWR(5220, 5220, 23, 6, IEEE80211_CHAN_PASSIVE_SCAN),
- /* IEEE 802.11a, channels 48..64 */
- RANGE_PWR(5240, 5320, 23, 6, IEEE80211_CHAN_NO_IBSS |
- IEEE80211_CHAN_RADAR),
- /* IEEE 802.11a, channels 100..140 */
- RANGE_PWR(5500, 5700, 30, 6, IEEE80211_CHAN_NO_IBSS |
- IEEE80211_CHAN_RADAR),
+static const struct ieee80211_regdomain us_regdom = {
+ .n_reg_rules = 6,
+ .alpha2 = "US",
+ .reg_rules = {
+ /* IEEE 802.11b/g, channels 1..11 */
+ REG_RULE(2412-10, 2462+10, 40, 6, 27, 0),
+ /* IEEE 802.11a, channel 36 */
+ REG_RULE(5180-10, 5180+10, 40, 6, 23, 0),
+ /* IEEE 802.11a, channel 40 */
+ REG_RULE(5200-10, 5200+10, 40, 6, 23, 0),
+ /* IEEE 802.11a, channel 44 */
+ REG_RULE(5220-10, 5220+10, 40, 6, 23, 0),
+ /* IEEE 802.11a, channels 48..64 */
+ REG_RULE(5240-10, 5320+10, 40, 6, 23, 0),
+ /* IEEE 802.11a, channels 149..165, outdoor */
+ REG_RULE(5745-10, 5825+10, 40, 6, 30, 0),
+ }
};
-#define REGDOM(_code) \
- { \
- .code = __stringify(_code), \
- .ranges = ieee80211_ ##_code## _channels, \
- .n_ranges = ARRAY_SIZE(ieee80211_ ##_code## _channels), \
+static const struct ieee80211_regdomain jp_regdom = {
+ .n_reg_rules = 3,
+ .alpha2 = "JP",
+ .reg_rules = {
+ /* IEEE 802.11b/g, channels 1..14 */
+ REG_RULE(2412-10, 2484+10, 40, 6, 20, 0),
+ /* IEEE 802.11a, channels 34..48 */
+ REG_RULE(5170-10, 5240+10, 40, 6, 20,
+ NL80211_RRF_PASSIVE_SCAN),
+ /* IEEE 802.11a, channels 52..64 */
+ REG_RULE(5260-10, 5320+10, 40, 6, 20,
+ NL80211_RRF_NO_IBSS |
+ NL80211_RRF_DFS),
}
+};
-static const struct ieee80211_regdomain ieee80211_regdoms[] = {
- REGDOM(US),
- REGDOM(JP),
- REGDOM(EU),
+static const struct ieee80211_regdomain eu_regdom = {
+ .n_reg_rules = 6,
+ /* This alpha2 is bogus, we leave it here just for stupid
+ * backward compatibility */
+ .alpha2 = "EU",
+ .reg_rules = {
+ /* IEEE 802.11b/g, channels 1..13 */
+ REG_RULE(2412-10, 2472+10, 40, 6, 20, 0),
+ /* IEEE 802.11a, channel 36 */
+ REG_RULE(5180-10, 5180+10, 40, 6, 23,
+ NL80211_RRF_PASSIVE_SCAN),
+ /* IEEE 802.11a, channel 40 */
+ REG_RULE(5200-10, 5200+10, 40, 6, 23,
+ NL80211_RRF_PASSIVE_SCAN),
+ /* IEEE 802.11a, channel 44 */
+ REG_RULE(5220-10, 5220+10, 40, 6, 23,
+ NL80211_RRF_PASSIVE_SCAN),
+ /* IEEE 802.11a, channels 48..64 */
+ REG_RULE(5240-10, 5320+10, 40, 6, 20,
+ NL80211_RRF_NO_IBSS |
+ NL80211_RRF_DFS),
+ /* IEEE 802.11a, channels 100..140 */
+ REG_RULE(5500-10, 5700+10, 40, 6, 30,
+ NL80211_RRF_NO_IBSS |
+ NL80211_RRF_DFS),
+ }
};
+static const struct ieee80211_regdomain *static_regdom(char *alpha2)
+{
+ if (alpha2[0] == 'U' && alpha2[1] == 'S')
+ return &us_regdom;
+ if (alpha2[0] == 'J' && alpha2[1] == 'P')
+ return &jp_regdom;
+ if (alpha2[0] == 'E' && alpha2[1] == 'U')
+ return &eu_regdom;
+ /* Default, as per the old rules */
+ return &us_regdom;
+}
+
+static bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
+{
+ if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom)
+ return true;
+ return false;
+}
+#else
+static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
+{
+ return false;
+}
+#endif
-static const struct ieee80211_regdomain *get_regdom(void)
+static void reset_regdomains(void)
{
- static const struct ieee80211_channel_range
- ieee80211_world_channels[] = {
- /* IEEE 802.11b/g, channels 1..11 */
- RANGE_PWR(2412, 2462, 27, 6, 0),
+ /* avoid freeing static information or freeing something twice */
+ if (cfg80211_regdomain == cfg80211_world_regdom)
+ cfg80211_regdomain = NULL;
+ if (cfg80211_world_regdom == &world_regdom)
+ cfg80211_world_regdom = NULL;
+ if (cfg80211_regdomain == &world_regdom)
+ cfg80211_regdomain = NULL;
+ if (is_old_static_regdom(cfg80211_regdomain))
+ cfg80211_regdomain = NULL;
+
+ kfree(cfg80211_regdomain);
+ kfree(cfg80211_world_regdom);
+
+ cfg80211_world_regdom = &world_regdom;
+ cfg80211_regdomain = NULL;
+}
+
+/* Dynamic world regulatory domain requested by the wireless
+ * core upon initialization */
+static void update_world_regdomain(const struct ieee80211_regdomain *rd)
+{
+ BUG_ON(list_empty(&regulatory_requests));
+
+ reset_regdomains();
+
+ cfg80211_world_regdom = rd;
+ cfg80211_regdomain = rd;
+}
+
+bool is_world_regdom(const char *alpha2)
+{
+ if (!alpha2)
+ return false;
+ if (alpha2[0] == '0' && alpha2[1] == '0')
+ return true;
+ return false;
+}
+
+static bool is_alpha2_set(const char *alpha2)
+{
+ if (!alpha2)
+ return false;
+ if (alpha2[0] != 0 && alpha2[1] != 0)
+ return true;
+ return false;
+}
+
+static bool is_alpha_upper(char letter)
+{
+ /* ASCII A - Z */
+ if (letter >= 65 && letter <= 90)
+ return true;
+ return false;
+}
+
+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 */
+ if (alpha2[0] == '9' && alpha2[1] == '9')
+ return true;
+ return false;
+}
+
+static bool is_an_alpha2(const char *alpha2)
+{
+ if (!alpha2)
+ return false;
+ if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1]))
+ return true;
+ return false;
+}
+
+static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
+{
+ if (!alpha2_x || !alpha2_y)
+ return false;
+ if (alpha2_x[0] == alpha2_y[0] &&
+ alpha2_x[1] == alpha2_y[1])
+ return true;
+ return false;
+}
+
+static bool regdom_changed(const char *alpha2)
+{
+ if (!cfg80211_regdomain)
+ return true;
+ if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
+ return false;
+ return true;
+}
+
+/* This lets us keep regulatory code which is updated on a regulatory
+ * basis in userspace. */
+static int call_crda(const char *alpha2)
+{
+ char country_env[9 + 2] = "COUNTRY=";
+ char *envp[] = {
+ country_env,
+ NULL
};
- static const struct ieee80211_regdomain regdom_world = REGDOM(world);
- int i;
- for (i = 0; i < ARRAY_SIZE(ieee80211_regdoms); i++)
- if (strcmp(ieee80211_regdom, ieee80211_regdoms[i].code) == 0)
- return &ieee80211_regdoms[i];
+ if (!is_world_regdom((char *) alpha2))
+ printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n",
+ alpha2[0], alpha2[1]);
+ else
+ printk(KERN_INFO "cfg80211: Calling CRDA to update world "
+ "regulatory domain\n");
+
+ country_env[8] = alpha2[0];
+ country_env[9] = alpha2[1];
- return &regdom_world;
+ return kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, envp);
}
+/* This has the logic which determines when a new request
+ * should be ignored. */
+static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
+ char *alpha2, struct ieee80211_regdomain *rd)
+{
+ struct regulatory_request *last_request = NULL;
+
+ /* All initial requests are respected */
+ if (list_empty(&regulatory_requests))
+ return 0;
+
+ last_request = list_first_entry(&regulatory_requests,
+ struct regulatory_request, list);
-static void handle_channel(struct ieee80211_channel *chan,
- const struct ieee80211_regdomain *rd)
+ switch (set_by) {
+ case REGDOM_SET_BY_INIT:
+ return -EINVAL;
+ case REGDOM_SET_BY_CORE:
+ /* Always respect new wireless core hints, should only
+ * come in for updating the world regulatory domain at init
+ * anyway */
+ return 0;
+ case REGDOM_SET_BY_COUNTRY_IE:
+ if (last_request->initiator == set_by) {
+ if (last_request->wiphy != wiphy) {
+ /* Two cards with two APs claiming different
+ * different Country IE alpha2s!
+ * You're special!! */
+ if (!alpha2_equal(last_request->alpha2,
+ cfg80211_regdomain->alpha2)) {
+ /* XXX: Deal with conflict, consider
+ * building a new one out of the
+ * intersection */
+ WARN_ON(1);
+ return -EOPNOTSUPP;
+ }
+ return -EALREADY;
+ }
+ /* Two consecutive Country IE hints on the same wiphy */
+ if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
+ return 0;
+ return -EALREADY;
+ }
+ if (WARN_ON(!is_alpha2_set(alpha2) || !is_an_alpha2(alpha2)),
+ "Invalid Country IE regulatory hint passed "
+ "to the wireless core\n")
+ return -EINVAL;
+ /* We ignore Country IE hints for now, as we haven't yet
+ * added the dot11MultiDomainCapabilityEnabled flag
+ * for wiphys */
+ return 1;
+ case REGDOM_SET_BY_DRIVER:
+ BUG_ON(!wiphy);
+ if (last_request->initiator == set_by) {
+ /* Two separate drivers hinting different things,
+ * this is possible if you have two devices present
+ * on a system with different EEPROM regulatory
+ * readings. XXX: Do intersection, we support only
+ * the first regulatory hint for now */
+ if (last_request->wiphy != wiphy)
+ return -EALREADY;
+ if (rd)
+ return -EALREADY;
+ /* Driver should not be trying to hint different
+ * regulatory domains! */
+ BUG_ON(!alpha2_equal(alpha2,
+ cfg80211_regdomain->alpha2));
+ return -EALREADY;
+ }
+ if (last_request->initiator == REGDOM_SET_BY_CORE)
+ return 0;
+ /* XXX: Handle intersection, and add the
+ * dot11MultiDomainCapabilityEnabled flag to wiphy. For now
+ * we assume the driver has this set to false, following the
+ * 802.11d dot11MultiDomainCapabilityEnabled documentation */
+ if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
+ return 0;
+ return 0;
+ case REGDOM_SET_BY_USER:
+ if (last_request->initiator == set_by ||
+ last_request->initiator == REGDOM_SET_BY_CORE)
+ return 0;
+ /* Drivers can use their wiphy's reg_notifier()
+ * to override any information */
+ if (last_request->initiator == REGDOM_SET_BY_DRIVER)
+ return 0;
+ /* XXX: Handle intersection */
+ if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
+ return -EOPNOTSUPP;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static bool __reg_is_valid_request(const char *alpha2,
+ struct regulatory_request **request)
+{
+ struct regulatory_request *req;
+ if (list_empty(&regulatory_requests))
+ return false;
+ list_for_each_entry(req, &regulatory_requests, list) {
+ if (alpha2_equal(req->alpha2, alpha2)) {
+ *request = req;
+ return true;
+ }
+ }
+ return false;
+}
+
+/* Used by nl80211 before kmalloc'ing our regulatory domain */
+bool reg_is_valid_request(const char *alpha2)
+{
+ struct regulatory_request *request = NULL;
+ return __reg_is_valid_request(alpha2, &request);
+}
+
+/* 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->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;
+
+ 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;
+}
+
+/* Returns value in KHz */
+static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range,
+ u32 freq)
+{
+ unsigned int i;
+ for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) {
+ u32 start_freq_khz = freq - supported_bandwidths[i]/2;
+ u32 end_freq_khz = freq + supported_bandwidths[i]/2;
+ if (start_freq_khz >= freq_range->start_freq_khz &&
+ end_freq_khz <= freq_range->end_freq_khz)
+ return supported_bandwidths[i];
+ }
+ return 0;
+}
+
+/* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
+ * want to just have the channel structure use these */
+static u32 map_regdom_flags(u32 rd_flags)
+{
+ u32 channel_flags = 0;
+ if (rd_flags & NL80211_RRF_PASSIVE_SCAN)
+ channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN;
+ if (rd_flags & NL80211_RRF_NO_IBSS)
+ channel_flags |= IEEE80211_CHAN_NO_IBSS;
+ if (rd_flags & NL80211_RRF_DFS)
+ channel_flags |= IEEE80211_CHAN_RADAR;
+ return channel_flags;
+}
+
+/**
+ * freq_reg_info - get regulatory information for the given frequency
+ * @center_freq: Frequency in KHz for which we want regulatory information for
+ * @bandwidth: the bandwidth requirement you have in KHz, if you do not have one
+ * you can set this to 0. If this frequency is allowed we then set
+ * this value to the maximum allowed bandwidth.
+ * @reg_rule: the regulatory rule which we have for this frequency
+ *
+ * Use this function to get the regulatory rule for a specific frequency.
+ */
+static int freq_reg_info(u32 center_freq, u32 *bandwidth,
+ const struct ieee80211_reg_rule **reg_rule)
{
int i;
- u32 flags = chan->orig_flags;
- const struct ieee80211_channel_range *rg = NULL;
+ u32 max_bandwidth = 0;
- for (i = 0; i < rd->n_ranges; i++) {
- if (rd->ranges[i].start_freq <= chan->center_freq &&
- chan->center_freq <= rd->ranges[i].end_freq) {
- rg = &rd->ranges[i];
+ if (!cfg80211_regdomain)
+ return -EINVAL;
+
+ for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
+ const struct ieee80211_reg_rule *rr;
+ const struct ieee80211_freq_range *fr = NULL;
+ const struct ieee80211_power_rule *pr = NULL;
+
+ rr = &cfg80211_regdomain->reg_rules[i];
+ fr = &rr->freq_range;
+ pr = &rr->power_rule;
+ max_bandwidth = freq_max_bandwidth(fr, center_freq);
+ if (max_bandwidth && *bandwidth <= max_bandwidth) {
+ *reg_rule = rr;
+ *bandwidth = max_bandwidth;
break;
}
}
- if (!rg) {
- /* not found */
+ return !max_bandwidth;
+}
+
+static void handle_channel(struct ieee80211_channel *chan)
+{
+ int r;
+ u32 flags = chan->orig_flags;
+ u32 max_bandwidth = 0;
+ const struct ieee80211_reg_rule *reg_rule = NULL;
+ const struct ieee80211_power_rule *power_rule = NULL;
+
+ r = freq_reg_info(MHZ_TO_KHZ(chan->center_freq),
+ &max_bandwidth, &reg_rule);
+
+ if (r) {
flags |= IEEE80211_CHAN_DISABLED;
chan->flags = flags;
return;
}
- chan->flags = flags;
+ power_rule = &reg_rule->power_rule;
+
+ chan->flags = flags | map_regdom_flags(reg_rule->flags);
chan->max_antenna_gain = min(chan->orig_mag,
- rg->max_antenna_gain);
+ (int) MBI_TO_DBI(power_rule->max_antenna_gain));
+ chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
if (chan->orig_mpwr)
- chan->max_power = min(chan->orig_mpwr, rg->max_power);
+ chan->max_power = min(chan->orig_mpwr,
+ (int) MBM_TO_DBM(power_rule->max_eirp));
else
- chan->max_power = rg->max_power;
+ chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
}
-static void handle_band(struct ieee80211_supported_band *sband,
- const struct ieee80211_regdomain *rd)
+static void handle_band(struct ieee80211_supported_band *sband)
{
int i;
for (i = 0; i < sband->n_channels; i++)
- handle_channel(&sband->channels[i], rd);
+ handle_channel(&sband->channels[i]);
}
-void wiphy_update_regulatory(struct wiphy *wiphy)
+static void update_all_wiphy_regulatory(enum reg_set_by setby)
{
- enum ieee80211_band band;
- const struct ieee80211_regdomain *rd = get_regdom();
+ struct cfg80211_registered_device *drv;
+
+ list_for_each_entry(drv, &cfg80211_drv_list, list)
+ wiphy_update_regulatory(&drv->wiphy, setby);
+}
- for (band = 0; band < IEEE80211_NUM_BANDS; band++)
+void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby)
+{
+ enum ieee80211_band band;
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
if (wiphy->bands[band])
- handle_band(wiphy->bands[band], rd);
+ handle_band(wiphy->bands[band]);
+ if (wiphy->reg_notifier)
+ wiphy->reg_notifier(wiphy, setby);
+ }
+}
+
+/* Caller must hold &cfg80211_drv_mutex */
+int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
+ const char *alpha2, struct ieee80211_regdomain *rd)
+{
+ struct regulatory_request *request;
+ char *rd_alpha2;
+ int r = 0;
+
+ r = ignore_request(wiphy, set_by, (char *) alpha2, rd);
+ if (r)
+ return r;
+
+ if (rd)
+ rd_alpha2 = rd->alpha2;
+ else
+ rd_alpha2 = (char *) alpha2;
+
+ switch (set_by) {
+ case REGDOM_SET_BY_CORE:
+ case REGDOM_SET_BY_COUNTRY_IE:
+ case REGDOM_SET_BY_DRIVER:
+ case REGDOM_SET_BY_USER:
+ request = kzalloc(sizeof(struct regulatory_request),
+ GFP_KERNEL);
+ if (!request)
+ return -ENOMEM;
+
+ request->alpha2[0] = rd_alpha2[0];
+ request->alpha2[1] = rd_alpha2[1];
+ request->initiator = set_by;
+ request->wiphy = wiphy;
+
+ list_add_tail(&request->list, &regulatory_requests);
+ if (rd)
+ break;
+ r = call_crda(alpha2);
+#ifndef CONFIG_WIRELESS_OLD_REGULATORY
+ if (r)
+ printk(KERN_ERR "cfg80211: Failed calling CRDA\n");
+#endif
+ break;
+ default:
+ r = -ENOTSUPP;
+ break;
+ }
+
+ return r;
+}
+
+/* If rd is not NULL and if this call fails the caller must free it */
+int regulatory_hint(struct wiphy *wiphy, const char *alpha2,
+ struct ieee80211_regdomain *rd)
+{
+ int r;
+ BUG_ON(!rd && !alpha2);
+
+ mutex_lock(&cfg80211_drv_mutex);
+
+ r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, rd);
+ if (r || !rd)
+ goto unlock_and_exit;
+
+ /* If the driver passed a regulatory domain we skipped asking
+ * userspace for one so we can now go ahead and set it */
+ r = set_regdom(rd);
+
+unlock_and_exit:
+ mutex_unlock(&cfg80211_drv_mutex);
+ return r;
+}
+EXPORT_SYMBOL(regulatory_hint);
+
+
+static void print_rd_rules(const struct ieee80211_regdomain *rd)
+{
+ unsigned int i;
+ const struct ieee80211_reg_rule *reg_rule = NULL;
+ const struct ieee80211_freq_range *freq_range = NULL;
+ const struct ieee80211_power_rule *power_rule = NULL;
+
+ printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), "
+ "(max_antenna_gain, max_eirp)\n");
+
+ for (i = 0; i < rd->n_reg_rules; i++) {
+ reg_rule = &rd->reg_rules[i];
+ freq_range = &reg_rule->freq_range;
+ power_rule = &reg_rule->power_rule;
+
+ /* There may not be documentation for max antenna gain
+ * in certain regions */
+ if (power_rule->max_antenna_gain)
+ printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
+ "(%d mBi, %d mBm)\n",
+ freq_range->start_freq_khz,
+ freq_range->end_freq_khz,
+ freq_range->max_bandwidth_khz,
+ power_rule->max_antenna_gain,
+ power_rule->max_eirp);
+ else
+ printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
+ "(N/A, %d mBm)\n",
+ freq_range->start_freq_khz,
+ freq_range->end_freq_khz,
+ freq_range->max_bandwidth_khz,
+ power_rule->max_eirp);
+ }
+}
+
+static void print_regdomain(const struct ieee80211_regdomain *rd)
+{
+
+ if (is_world_regdom(rd->alpha2))
+ printk(KERN_INFO "cfg80211: World regulatory "
+ "domain updated:\n");
+ else {
+ if (is_unknown_alpha2(rd->alpha2))
+ printk(KERN_INFO "cfg80211: Regulatory domain "
+ "changed to driver built-in settings "
+ "(unknown country)\n");
+ else
+ printk(KERN_INFO "cfg80211: Regulatory domain "
+ "changed to country: %c%c\n",
+ rd->alpha2[0], rd->alpha2[1]);
+ }
+ print_rd_rules(rd);
+}
+
+void print_regdomain_info(const struct ieee80211_regdomain *rd)
+{
+ printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n",
+ rd->alpha2[0], rd->alpha2[1]);
+ print_rd_rules(rd);
+}
+
+static int __set_regdom(const struct ieee80211_regdomain *rd)
+{
+ struct regulatory_request *request = NULL;
+
+ /* Some basic sanity checks first */
+
+ if (is_world_regdom(rd->alpha2)) {
+ if (WARN_ON(!__reg_is_valid_request(rd->alpha2, &request)))
+ return -EINVAL;
+ update_world_regdomain(rd);
+ return 0;
+ }
+
+ if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
+ !is_unknown_alpha2(rd->alpha2))
+ return -EINVAL;
+
+ if (list_empty(&regulatory_requests))
+ return -EINVAL;
+
+ /* allow overriding the static definitions if CRDA is present */
+ if (!is_old_static_regdom(cfg80211_regdomain) &&
+ !regdom_changed(rd->alpha2))
+ return -EINVAL;
+
+ /* Now lets set the regulatory domain, update all driver channels
+ * and finally inform them of what we have done, in case they want
+ * to review or adjust their own settings based on their own
+ * internal EEPROM data */
+
+ if (WARN_ON(!__reg_is_valid_request(rd->alpha2, &request)))
+ return -EINVAL;
+
+ reset_regdomains();
+
+ /* Country IE parsing coming soon */
+ switch (request->initiator) {
+ case REGDOM_SET_BY_CORE:
+ case REGDOM_SET_BY_DRIVER:
+ case REGDOM_SET_BY_USER:
+ if (!is_valid_rd(rd)) {
+ printk(KERN_ERR "cfg80211: Invalid "
+ "regulatory domain detected:\n");
+ print_regdomain_info(rd);
+ return -EINVAL;
+ }
+ break;
+ case REGDOM_SET_BY_COUNTRY_IE: /* Not yet */
+ WARN_ON(1);
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ /* Tada! */
+ cfg80211_regdomain = rd;
+ request->granted = 1;
+
+ return 0;
+}
+
+
+/* Use this call to set the current regulatory domain. Conflicts with
+ * multiple drivers can be ironed out later. Caller must've already
+ * kmalloc'd the rd structure. If this calls fails you should kfree()
+ * the passed rd. Caller must hold cfg80211_drv_mutex */
+int set_regdom(const struct ieee80211_regdomain *rd)
+{
+ struct regulatory_request *this_request = NULL, *prev_request = NULL;
+ int r;
+
+ if (!list_empty(&regulatory_requests))
+ prev_request = list_first_entry(&regulatory_requests,
+ struct regulatory_request, list);
+
+ /* Note that this doesn't update the wiphys, this is done below */
+ r = __set_regdom(rd);
+ if (r)
+ return r;
+
+ BUG_ON((!__reg_is_valid_request(rd->alpha2, &this_request)));
+
+ /* The initial standard core update of the world regulatory domain, no
+ * need to keep that request info around if it didn't fail. */
+ if (is_world_regdom(rd->alpha2) &&
+ this_request->initiator == REGDOM_SET_BY_CORE &&
+ this_request->granted) {
+ list_del(&this_request->list);
+ kfree(this_request);
+ this_request = NULL;
+ }
+
+ /* Remove old requests, we only leave behind the last one */
+ if (prev_request) {
+ list_del(&prev_request->list);
+ kfree(prev_request);
+ prev_request = NULL;
+ }
+
+ /* This would make this whole thing pointless */
+ BUG_ON(rd != cfg80211_regdomain);
+
+ /* update all wiphys now with the new established regulatory domain */
+ update_all_wiphy_regulatory(this_request->initiator);
+
+ print_regdomain(rd);
+
+ return r;
+}
+
+int regulatory_init(void)
+{
+ int err;
+
+ reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
+ if (IS_ERR(reg_pdev))
+ return PTR_ERR(reg_pdev);
+
+#ifdef CONFIG_WIRELESS_OLD_REGULATORY
+ cfg80211_regdomain = static_regdom(ieee80211_regdom);
+
+ printk(KERN_INFO "cfg80211: Using static regulatory domain info\n");
+ print_regdomain_info(cfg80211_regdomain);
+ /* The old code still requests for a new regdomain and if
+ * you have CRDA you get it updated, otherwise you get
+ * stuck with the static values. We ignore "EU" code as
+ * that is not a valid ISO / IEC 3166 alpha2 */
+ if (ieee80211_regdom[0] != 'E' && ieee80211_regdom[1] != 'U')
+ err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE,
+ ieee80211_regdom, NULL);
+#else
+ cfg80211_regdomain = cfg80211_world_regdom;
+
+ err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL);
+ if (err)
+ printk(KERN_ERR "cfg80211: calling CRDA failed - "
+ "unable to update world regulatory domain, "
+ "using static definition\n");
+#endif
+
+ return 0;
+}
+
+void regulatory_exit(void)
+{
+ struct regulatory_request *req, *req_tmp;
+
+ mutex_lock(&cfg80211_drv_mutex);
+
+ reset_regdomains();
+
+ list_for_each_entry_safe(req, req_tmp, &regulatory_requests, list) {
+ list_del(&req->list);
+ kfree(req);
+ }
+ platform_device_unregister(reg_pdev);
+
+ mutex_unlock(&cfg80211_drv_mutex);
}
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
new file mode 100644
index 00000000000..a33362872f3
--- /dev/null
+++ b/net/wireless/reg.h
@@ -0,0 +1,13 @@
+#ifndef __NET_WIRELESS_REG_H
+#define __NET_WIRELESS_REG_H
+
+extern struct mutex cfg80211_reg_mutex;
+bool is_world_regdom(const char *alpha2);
+bool reg_is_valid_request(const char *alpha2);
+
+int regulatory_init(void);
+void regulatory_exit(void);
+
+int set_regdom(const struct ieee80211_regdomain *rd);
+
+#endif /* __NET_WIRELESS_REG_H */