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-rw-r--r--include/linux/ieee80211.h62
-rw-r--r--include/net/wireless.h15
-rw-r--r--net/mac80211/mlme.c7
-rw-r--r--net/wireless/Kconfig11
-rw-r--r--net/wireless/core.c5
-rw-r--r--net/wireless/core.h13
-rw-r--r--net/wireless/nl80211.c2
-rw-r--r--net/wireless/reg.c479
-rw-r--r--net/wireless/reg.h21
9 files changed, 591 insertions, 24 deletions
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 56b0eb25d92..a6ec928186a 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1042,6 +1042,68 @@ enum ieee80211_spectrum_mgmt_actioncode {
WLAN_ACTION_SPCT_CHL_SWITCH = 4,
};
+/*
+ * IEEE 802.11-2007 7.3.2.9 Country information element
+ *
+ * Minimum length is 8 octets, ie len must be evenly
+ * divisible by 2
+ */
+
+/* Although the spec says 8 I'm seeing 6 in practice */
+#define IEEE80211_COUNTRY_IE_MIN_LEN 6
+
+/*
+ * For regulatory extension stuff see IEEE 802.11-2007
+ * Annex I (page 1141) and Annex J (page 1147). Also
+ * review 7.3.2.9.
+ *
+ * When dot11RegulatoryClassesRequired is true and the
+ * first_channel/reg_extension_id is >= 201 then the IE
+ * compromises of the 'ext' struct represented below:
+ *
+ * - Regulatory extension ID - when generating IE this just needs
+ * to be monotonically increasing for each triplet passed in
+ * the IE
+ * - Regulatory class - index into set of rules
+ * - Coverage class - index into air propagation time (Table 7-27),
+ * in microseconds, you can compute the air propagation time from
+ * the index by multiplying by 3, so index 10 yields a propagation
+ * of 10 us. Valid values are 0-31, values 32-255 are not defined
+ * yet. A value of 0 inicates air propagation of <= 1 us.
+ *
+ * See also Table I.2 for Emission limit sets and table
+ * I.3 for Behavior limit sets. Table J.1 indicates how to map
+ * a reg_class to an emission limit set and behavior limit set.
+ */
+#define IEEE80211_COUNTRY_EXTENSION_ID 201
+
+/*
+ * Channels numbers in the IE must be monotonically increasing
+ * if dot11RegulatoryClassesRequired is not true.
+ *
+ * If dot11RegulatoryClassesRequired is true consecutive
+ * subband triplets following a regulatory triplet shall
+ * have monotonically increasing first_channel number fields.
+ *
+ * Channel numbers shall not overlap.
+ *
+ * Note that max_power is signed.
+ */
+struct ieee80211_country_ie_triplet {
+ union {
+ struct {
+ u8 first_channel;
+ u8 num_channels;
+ s8 max_power;
+ } __attribute__ ((packed)) chans;
+ struct {
+ u8 reg_extension_id;
+ u8 reg_class;
+ u8 coverage_class;
+ } __attribute__ ((packed)) ext;
+ };
+} __attribute__ ((packed));
+
/* BACK action code */
enum ieee80211_back_actioncode {
WLAN_ACTION_ADDBA_REQ = 0,
diff --git a/include/net/wireless.h b/include/net/wireless.h
index 412351560b7..c85fa0ea5c5 100644
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -373,4 +373,19 @@ ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
* for a regulatory domain structure for the respective country.
*/
extern void regulatory_hint(struct wiphy *wiphy, const char *alpha2);
+
+/**
+ * regulatory_hint_11d - hints a country IE as a regulatory domain
+ * @wiphy: the wireless device giving the hint (used only for reporting
+ * conflicts)
+ * @country_ie: pointer to the country IE
+ * @country_ie_len: length of the country IE
+ *
+ * We will intersect the rd with the what CRDA tells us should apply
+ * for the alpha2 this country IE belongs to, this prevents APs from
+ * sending us incorrect or outdated information against a country.
+ */
+extern void regulatory_hint_11d(struct wiphy *wiphy,
+ u8 *country_ie,
+ u8 country_ie_len);
#endif /* __NET_WIRELESS_H */
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index d81a4d2cd3a..30adaddeed2 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1736,6 +1736,13 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
ap_ht_cap_flags);
}
+ if (elems.country_elem) {
+ /* Note we are only reviewing this on beacons
+ * for the BSSID we are associated to */
+ regulatory_hint_11d(local->hw.wiphy,
+ elems.country_elem, elems.country_elem_len);
+ }
+
ieee80211_bss_info_change_notify(sdata, changed);
}
diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index f7c64dbe86c..e28e2b8fa43 100644
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -1,6 +1,15 @@
config CFG80211
tristate "Improved wireless configuration API"
+config CFG80211_REG_DEBUG
+ bool "cfg80211 regulatory debugging"
+ depends on CFG80211
+ default n
+ ---help---
+ You can enable this if you want to debug regulatory changes.
+
+ If unsure, say N.
+
config NL80211
bool "nl80211 new netlink interface support"
depends on CFG80211
@@ -40,6 +49,8 @@ config WIRELESS_OLD_REGULATORY
ieee80211_regdom module parameter. This is being phased out and you
should stop using them ASAP.
+ Note: You will need CRDA if you want 802.11d support
+
Say Y unless you have installed a new userspace application.
Also say Y if have one currently depending on the ieee80211_regdom
module parameter and cannot port it to use the new userspace
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 39e3d10fccd..b96fc0c3f1c 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -19,7 +19,6 @@
#include "nl80211.h"
#include "core.h"
#include "sysfs.h"
-#include "reg.h"
/* name for sysfs, %d is appended */
#define PHY_NAME "phy"
@@ -348,6 +347,10 @@ void wiphy_unregister(struct wiphy *wiphy)
/* unlock again before freeing */
mutex_unlock(&drv->mtx);
+ /* If this device got a regulatory hint tell core its
+ * free to listen now to a new shiny device regulatory hint */
+ reg_device_remove(wiphy);
+
list_del(&drv->list);
device_del(&drv->wiphy.dev);
debugfs_remove(drv->wiphy.debugfsdir);
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 771cc5cc765..f7fb9f41302 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -11,6 +11,7 @@
#include <net/genetlink.h>
#include <net/wireless.h>
#include <net/cfg80211.h>
+#include "reg.h"
struct cfg80211_registered_device {
struct cfg80211_ops *ops;
@@ -21,6 +22,18 @@ struct cfg80211_registered_device {
* any call is in progress */
struct mutex mtx;
+ /* ISO / IEC 3166 alpha2 for which this device is receiving
+ * country IEs on, this can help disregard country IEs from APs
+ * on the same alpha2 quickly. The alpha2 may differ from
+ * cfg80211_regdomain's alpha2 when an intersection has occurred.
+ * If the AP is reconfigured this can also be used to tell us if
+ * the country on the country IE changed. */
+ char country_ie_alpha2[2];
+
+ /* If a Country IE has been received this tells us the environment
+ * which its telling us its in. This defaults to ENVIRON_ANY */
+ enum environment_cap env;
+
/* wiphy index, internal only */
int idx;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index e3e1494e769..00121ceddb1 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1760,7 +1760,7 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
#endif
mutex_lock(&cfg80211_drv_mutex);
- r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data);
+ r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, 0, ENVIRON_ANY);
mutex_unlock(&cfg80211_drv_mutex);
return r;
}
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index f0ff3d1779d..4dab993ea48 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -60,12 +60,18 @@
* @intersect: indicates whether the wireless core should intersect
* the requested regulatory domain with the presently set regulatory
* domain.
+ * @country_ie_checksum: checksum of the last processed and accepted
+ * country IE
+ * @country_ie_env: lets us know if the AP is telling us we are outdoor,
+ * indoor, or if it doesn't matter
*/
struct regulatory_request {
struct wiphy *wiphy;
enum reg_set_by initiator;
char alpha2[2];
bool intersect;
+ u32 country_ie_checksum;
+ enum environment_cap country_ie_env;
};
/* Receipt of information from last regulatory request */
@@ -85,6 +91,11 @@ static u32 supported_bandwidths[] = {
* information to give us an alpha2 */
static const struct ieee80211_regdomain *cfg80211_regdomain;
+/* We use this as a place for the rd structure built from the
+ * last parsed country IE to rest until CRDA gets back to us with
+ * what it thinks should apply for the same country */
+static const struct ieee80211_regdomain *country_ie_regdomain;
+
/* 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,
@@ -264,6 +275,18 @@ static bool is_unknown_alpha2(const char *alpha2)
return false;
}
+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 */
+ if (alpha2[0] == '9' && alpha2[1] == '8')
+ return true;
+ return false;
+}
+
static bool is_an_alpha2(const char *alpha2)
{
if (!alpha2)
@@ -292,6 +315,25 @@ static bool regdom_changed(const char *alpha2)
return true;
}
+/**
+ * country_ie_integrity_changes - tells us if the country IE has changed
+ * @checksum: checksum of country IE of fields we are interested in
+ *
+ * If the country IE has not changed you can ignore it safely. This is
+ * useful to determine if two devices are seeing two different country IEs
+ * even on the same alpha2. Note that this will return false if no IE has
+ * been set on the wireless core yet.
+ */
+static bool country_ie_integrity_changes(u32 checksum)
+{
+ /* If no IE has been set then the checksum doesn't change */
+ if (unlikely(!last_request->country_ie_checksum))
+ return false;
+ if (unlikely(last_request->country_ie_checksum != checksum))
+ return true;
+ return false;
+}
+
/* This lets us keep regulatory code which is updated on a regulatory
* basis in userspace. */
static int call_crda(const char *alpha2)
@@ -379,6 +421,174 @@ static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range,
return 0;
}
+/* Converts a country IE to a regulatory domain. A regulatory domain
+ * structure has a lot of information which the IE doesn't yet have,
+ * so for the other values we use upper max values as we will intersect
+ * with our userspace regulatory agent to get lower bounds. */
+static struct ieee80211_regdomain *country_ie_2_rd(
+ u8 *country_ie,
+ u8 country_ie_len,
+ u32 *checksum)
+{
+ struct ieee80211_regdomain *rd = NULL;
+ unsigned int i = 0;
+ char alpha2[2];
+ u32 flags = 0;
+ u32 num_rules = 0, size_of_regd = 0;
+ u8 *triplets_start = NULL;
+ u8 len_at_triplet = 0;
+ /* the last channel we have registered in a subband (triplet) */
+ int last_sub_max_channel = 0;
+
+ *checksum = 0xDEADBEEF;
+
+ /* Country IE requirements */
+ BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN ||
+ country_ie_len & 0x01);
+
+ alpha2[0] = country_ie[0];
+ alpha2[1] = country_ie[1];
+
+ /*
+ * Third octet can be:
+ * 'I' - Indoor
+ * 'O' - Outdoor
+ *
+ * anything else we assume is no restrictions
+ */
+ if (country_ie[2] == 'I')
+ flags = NL80211_RRF_NO_OUTDOOR;
+ else if (country_ie[2] == 'O')
+ flags = NL80211_RRF_NO_INDOOR;
+
+ country_ie += 3;
+ country_ie_len -= 3;
+
+ triplets_start = country_ie;
+ len_at_triplet = country_ie_len;
+
+ *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8);
+
+ /* We need to build a reg rule for each triplet, but first we must
+ * calculate the number of reg rules we will need. We will need one
+ * for each channel subband */
+ while (country_ie_len >= 3) {
+ struct ieee80211_country_ie_triplet *triplet =
+ (struct ieee80211_country_ie_triplet *) country_ie;
+ int cur_sub_max_channel = 0, cur_channel = 0;
+
+ if (triplet->ext.reg_extension_id >=
+ IEEE80211_COUNTRY_EXTENSION_ID) {
+ country_ie += 3;
+ country_ie_len -= 3;
+ continue;
+ }
+
+ cur_channel = triplet->chans.first_channel;
+ cur_sub_max_channel = ieee80211_channel_to_frequency(
+ cur_channel + triplet->chans.num_channels);
+
+ /* Basic sanity check */
+ if (cur_sub_max_channel < cur_channel)
+ return NULL;
+
+ /* Do not allow overlapping channels. Also channels
+ * passed in each subband must be monotonically
+ * increasing */
+ if (last_sub_max_channel) {
+ if (cur_channel <= last_sub_max_channel)
+ return NULL;
+ if (cur_sub_max_channel <= last_sub_max_channel)
+ return NULL;
+ }
+
+ /* When dot11RegulatoryClassesRequired is supported
+ * we can throw ext triplets as part of this soup,
+ * for now we don't care when those change as we
+ * don't support them */
+ *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) |
+ ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) |
+ ((triplet->chans.max_power ^ cur_sub_max_channel) << 24);
+
+ last_sub_max_channel = cur_sub_max_channel;
+
+ country_ie += 3;
+ country_ie_len -= 3;
+ num_rules++;
+
+ /* Note: this is not a IEEE requirement but
+ * simply a memory requirement */
+ if (num_rules > NL80211_MAX_SUPP_REG_RULES)
+ return NULL;
+ }
+
+ country_ie = triplets_start;
+ country_ie_len = len_at_triplet;
+
+ size_of_regd = sizeof(struct ieee80211_regdomain) +
+ (num_rules * sizeof(struct ieee80211_reg_rule));
+
+ rd = kzalloc(size_of_regd, GFP_KERNEL);
+ if (!rd)
+ return NULL;
+
+ rd->n_reg_rules = num_rules;
+ rd->alpha2[0] = alpha2[0];
+ rd->alpha2[1] = alpha2[1];
+
+ /* This time around we fill in the rd */
+ while (country_ie_len >= 3) {
+ struct ieee80211_country_ie_triplet *triplet =
+ (struct ieee80211_country_ie_triplet *) country_ie;
+ struct ieee80211_reg_rule *reg_rule = NULL;
+ struct ieee80211_freq_range *freq_range = NULL;
+ struct ieee80211_power_rule *power_rule = NULL;
+
+ /* Must parse if dot11RegulatoryClassesRequired is true,
+ * we don't support this yet */
+ if (triplet->ext.reg_extension_id >=
+ IEEE80211_COUNTRY_EXTENSION_ID) {
+ country_ie += 3;
+ country_ie_len -= 3;
+ continue;
+ }
+
+ reg_rule = &rd->reg_rules[i];
+ freq_range = &reg_rule->freq_range;
+ power_rule = &reg_rule->power_rule;
+
+ reg_rule->flags = flags;
+
+ /* The +10 is since the regulatory domain expects
+ * the actual band edge, not the center of freq for
+ * its start and end freqs, assuming 20 MHz bandwidth on
+ * the channels passed */
+ freq_range->start_freq_khz =
+ MHZ_TO_KHZ(ieee80211_channel_to_frequency(
+ triplet->chans.first_channel) - 10);
+ freq_range->end_freq_khz =
+ MHZ_TO_KHZ(ieee80211_channel_to_frequency(
+ triplet->chans.first_channel +
+ triplet->chans.num_channels) + 10);
+
+ /* Large arbitrary values, we intersect later */
+ /* Increment this if we ever support >= 40 MHz channels
+ * in IEEE 802.11 */
+ freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40);
+ power_rule->max_antenna_gain = DBI_TO_MBI(100);
+ power_rule->max_eirp = DBM_TO_MBM(100);
+
+ country_ie += 3;
+ country_ie_len -= 3;
+ i++;
+
+ BUG_ON(i > NL80211_MAX_SUPP_REG_RULES);
+ }
+
+ return rd;
+}
+
+
/* Helper for regdom_intersect(), this does the real
* mathematical intersection fun */
static int reg_rules_intersect(
@@ -663,16 +873,14 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
return -EOPNOTSUPP;
return -EALREADY;
}
- /* Two consecutive Country IE hints on the same wiphy */
- if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
+ /* Two consecutive Country IE hints on the same wiphy.
+ * This should be picked up early by the driver/stack */
+ if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2,
+ alpha2)))
return 0;
return -EALREADY;
}
- /*
- * Ignore Country IE hints for now, need to think about
- * what we need to do to support multi-domain operation.
- */
- return -EOPNOTSUPP;
+ return REG_INTERSECT;
case REGDOM_SET_BY_DRIVER:
if (last_request->initiator == REGDOM_SET_BY_DRIVER)
return -EALREADY;
@@ -680,6 +888,11 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
case REGDOM_SET_BY_USER:
if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
return REG_INTERSECT;
+ /* If the user knows better the user should set the regdom
+ * to their country before the IE is picked up */
+ if (last_request->initiator == REGDOM_SET_BY_USER &&
+ last_request->intersect)
+ return -EOPNOTSUPP;
return 0;
}
@@ -688,7 +901,9 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
/* Caller must hold &cfg80211_drv_mutex */
int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
- const char *alpha2)
+ const char *alpha2,
+ u32 country_ie_checksum,
+ enum environment_cap env)
{
struct regulatory_request *request;
bool intersect = false;
@@ -711,9 +926,21 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
request->initiator = set_by;
request->wiphy = wiphy;
request->intersect = intersect;
+ request->country_ie_checksum = country_ie_checksum;
+ request->country_ie_env = env;
kfree(last_request);
last_request = request;
+ /*
+ * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled
+ * AND if CRDA is NOT present nothing will happen, if someone
+ * wants to bother with 11d with OLD_REG you can add a timer.
+ * If after x amount of time nothing happens you can call:
+ *
+ * return set_regdom(country_ie_regdomain);
+ *
+ * to intersect with the static rd
+ */
return call_crda(alpha2);
}
@@ -722,11 +949,120 @@ void regulatory_hint(struct wiphy *wiphy, const char *alpha2)
BUG_ON(!alpha2);
mutex_lock(&cfg80211_drv_mutex);
- __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2);
+ __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, 0, ENVIRON_ANY);
mutex_unlock(&cfg80211_drv_mutex);
}
EXPORT_SYMBOL(regulatory_hint);
+static bool reg_same_country_ie_hint(struct wiphy *wiphy,
+ u32 country_ie_checksum)
+{
+ if (!last_request->wiphy)
+ return false;
+ if (likely(last_request->wiphy != wiphy))
+ return !country_ie_integrity_changes(country_ie_checksum);
+ /* We should not have let these through at this point, they
+ * should have been picked up earlier by the first alpha2 check
+ * on the device */
+ if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum)))
+ return true;
+ return false;
+}
+
+void regulatory_hint_11d(struct wiphy *wiphy,
+ u8 *country_ie,
+ u8 country_ie_len)
+{
+ struct ieee80211_regdomain *rd = NULL;
+ char alpha2[2];
+ u32 checksum = 0;
+ enum environment_cap env = ENVIRON_ANY;
+
+ mutex_lock(&cfg80211_drv_mutex);
+
+ /* IE len must be evenly divisible by 2 */
+ if (country_ie_len & 0x01)
+ goto out;
+
+ if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
+ goto out;
+
+ /* Pending country IE processing, this can happen after we
+ * call CRDA and wait for a response if a beacon was received before
+ * we were able to process the last regulatory_hint_11d() call */
+ if (country_ie_regdomain)
+ goto out;
+
+ 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;
+
+ /* We will run this for *every* beacon processed for the BSSID, so
+ * we optimize an early check to exit out early if we don't have to
+ * do anything */
+ if (likely(last_request->wiphy)) {
+ struct cfg80211_registered_device *drv_last_ie;
+
+ drv_last_ie = wiphy_to_dev(last_request->wiphy);
+
+ /* Lets keep this simple -- we trust the first AP
+ * after we intersect with CRDA */
+ if (likely(last_request->wiphy == wiphy)) {
+ /* Ignore IEs coming in on this wiphy with
+ * the same alpha2 and environment cap */
+ if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
+ alpha2) &&
+ env == drv_last_ie->env)) {
+ goto out;
+ }
+ /* the wiphy moved on to another BSSID or the AP
+ * was reconfigured. XXX: We need to deal with the
+ * case where the user suspends and goes to goes
+ * to another country, and then gets IEs from an
+ * AP with different settings */
+ goto out;
+ } else {
+ /* Ignore IEs coming in on two separate wiphys with
+ * the same alpha2 and environment cap */
+ if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
+ alpha2) &&
+ env == drv_last_ie->env)) {
+ goto out;
+ }
+ /* We could potentially intersect though */
+ goto out;
+ }
+ }
+
+ rd = country_ie_2_rd(country_ie, country_ie_len, &checksum);
+ if (!rd)
+ goto out;
+
+ /* This will not happen right now but we leave it here for the
+ * the future when we want to add suspend/resume support and having
+ * the user move to another country after doing so, or having the user
+ * move to another AP. Right now we just trust the first AP. This is why
+ * this is marked as likley(). If we hit this before we add this support
+ * we want to be informed of it as it would indicate a mistake in the
+ * current design */
+ if (likely(WARN_ON(reg_same_country_ie_hint(wiphy, checksum))))
+ goto out;
+
+ /* We keep this around for when CRDA comes back with a response so
+ * we can intersect with that */
+ country_ie_regdomain = rd;
+
+ __regulatory_hint(wiphy, REGDOM_SET_BY_COUNTRY_IE,
+ country_ie_regdomain->alpha2, checksum, env);
+
+out:
+ mutex_unlock(&cfg80211_drv_mutex);
+}
+EXPORT_SYMBOL(regulatory_hint_11d);
static void print_rd_rules(const struct ieee80211_regdomain *rd)
{
@@ -766,7 +1102,25 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd)
static void print_regdomain(const struct ieee80211_regdomain *rd)
{
- if (is_world_regdom(rd->alpha2))
+ if (is_intersected_alpha2(rd->alpha2)) {
+ struct wiphy *wiphy = NULL;
+ struct cfg80211_registered_device *drv;
+
+ if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) {
+ if (last_request->wiphy) {
+ wiphy = last_request->wiphy;
+ drv = wiphy_to_dev(wiphy);
+ printk(KERN_INFO "cfg80211: Current regulatory "
+ "domain updated by AP to: %c%c\n",
+ drv->country_ie_alpha2[0],
+ drv->country_ie_alpha2[1]);
+ } else
+ printk(KERN_INFO "cfg80211: Current regulatory "
+ "domain intersected: \n");
+ } else
+ printk(KERN_INFO "cfg80211: Current regulatory "
+ "intersected: \n");
+ } else if (is_world_regdom(rd->alpha2))
printk(KERN_INFO "cfg80211: World regulatory "
"domain updated:\n");
else {
@@ -789,10 +1143,39 @@ static void print_regdomain_info(const struct ieee80211_regdomain *rd)
print_rd_rules(rd);
}
+#ifdef CONFIG_CFG80211_REG_DEBUG
+static void reg_country_ie_process_debug(
+ const struct ieee80211_regdomain *rd,
+ const struct ieee80211_regdomain *country_ie_regdomain,
+ const struct ieee80211_regdomain *intersected_rd)
+{
+ printk(KERN_DEBUG "cfg80211: Received country IE:\n");
+ print_regdomain_info(country_ie_regdomain);
+ printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n");
+ print_regdomain_info(rd);
+ if (intersected_rd) {
+ printk(KERN_DEBUG "cfg80211: We intersect both of these "
+ "and get:\n");
+ print_regdomain_info(rd);
+ return;
+ }
+ printk(KERN_DEBUG "cfg80211: Intersection between both failed\n");
+}
+#else
+static inline void reg_country_ie_process_debug(
+ const struct ieee80211_regdomain *rd,
+ const struct ieee80211_regdomain *country_ie_regdomain,
+ const struct ieee80211_regdomain *intersected_rd)
+{
+}
+#endif
+
/* Takes ownership of rd only if it doesn't fail */
static int __set_regdom(const struct ieee80211_regdomain *rd)
{
const struct ieee80211_regdomain *intersected_rd = NULL;
+ struct cfg80211_registered_device *drv = NULL;
+ struct wiphy *wiphy = NULL;
/* Some basic sanity checks first */
if (is_world_regdom(rd->alpha2)) {
@@ -809,10 +1192,18 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
if (!last_request)
return -EINVAL;
- /* allow overriding the static definitions if CRDA is present */
- if (!is_old_static_regdom(cfg80211_regdomain) &&
- !regdom_changed(rd->alpha2))
- return -EINVAL;
+ /* 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 (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) {
+ /* If someone else asked us to change the rd lets only bother
+ * checking if the alpha2 changes if CRDA was already called */
+ if (!is_old_static_regdom(cfg80211_regdomain) &&
+ !regdom_changed(rd->alpha2))
+ return -EINVAL;
+ }
+
+ wiphy = last_request->wiphy;
/* Now lets set the regulatory domain, update all driver channels
* and finally inform them of what we have done, in case they want
@@ -853,9 +1244,47 @@ static int __set_regdom(const struct ieee80211_regdomain *rd)
return 0;
}
- /* Country IE parsing coming soon */
+ /*
+ * Country IE requests are handled a bit differently, we intersect
+ * the country IE rd with what CRDA believes that country should have
+ */
+
+ BUG_ON(!country_ie_regdomain);
+
+ if (rd != country_ie_regdomain) {
+ /* Intersect what CRDA returned and our what we
+ * had built from the Country IE received */
+
+ intersected_rd = regdom_intersect(rd, country_ie_regdomain);
+
+ reg_country_ie_process_debug(rd, country_ie_regdomain,
+ intersected_rd);
+
+ kfree(country_ie_regdomain);
+ country_ie_regdomain = NULL;
+ } else {
+ /* This would happen when CRDA was not present and
+ * OLD_REGULATORY was enabled. We intersect our Country
+ * IE rd and what was set on cfg80211 originally */
+ intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
+ }
+
+ if (!intersected_rd)
+ return -EINVAL;
+
+ drv = wiphy_to_dev(wiphy);
+
+ drv->country_ie_alpha2[0] = rd->alpha2[0];
+ drv->country_ie_alpha2[1] = rd->alpha2[1];
+ drv->env = last_request->country_ie_env;
+
+ BUG_ON(intersected_rd == rd);
+
+ kfree(rd);
+ rd = NULL;
+
reset_regdomains();
- WARN_ON(1);
+ cfg80211_regdomain = intersected_rd;
return 0;
}
@@ -887,6 +1316,17 @@ int set_regdom(const struct ieee80211_regdomain *rd)
return r;
}
+/* Caller must hold cfg80211_drv_mutex */
+void reg_device_remove(struct wiphy *wiphy)
+{
+ if (!last_request->wiphy)
+ return;
+ if (last_request->wiphy != wiphy)
+ return;
+ last_request->wiphy = NULL;
+ last_request->country_ie_env = ENVIRON_ANY;
+}
+
int regulatory_init(void)
{
int err;
@@ -906,11 +1346,11 @@ int regulatory_init(void)
* 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);
+ ieee80211_regdom, 0, ENVIRON_ANY);
#else
cfg80211_regdomain = cfg80211_world_regdom;
- err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00");
+ err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", 0, ENVIRON_ANY);
if (err)
printk(KERN_ERR "cfg80211: calling CRDA failed - "
"unable to update world regulatory domain, "
@@ -926,6 +1366,9 @@ void regulatory_exit(void)
reset_regdomains();
+ kfree(country_ie_regdomain);
+ country_ie_regdomain = NULL;
+
kfree(last_request);
platform_device_unregister(reg_pdev);
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index c9b6b6358bb..a76ea3ff7cd 100644
--- a/net/wireless/reg.h
+++ b/net/wireless/reg.h
@@ -4,28 +4,41 @@
bool is_world_regdom(const char *alpha2);
bool reg_is_valid_request(const char *alpha2);
+void reg_device_remove(struct wiphy *wiphy);
+
int regulatory_init(void);
void regulatory_exit(void);
int set_regdom(const struct ieee80211_regdomain *rd);
+enum environment_cap {
+ ENVIRON_ANY,
+ ENVIRON_INDOOR,
+ ENVIRON_OUTDOOR,
+};
+
+
/**
* __regulatory_hint - hint to the wireless core a regulatory domain
* @wiphy: if the hint comes from country information from an AP, this
* is required to be set to the wiphy that received the information
* @alpha2: the ISO/IEC 3166 alpha2 being claimed the regulatory domain
* should be in.
+ * @country_ie_checksum: checksum of processed country IE, set this to 0
+ * if the hint did not come from a country IE
+ * @country_ie_env: the environment the IE told us we are in, %ENVIRON_*
*
* The Wireless subsystem can use this function to hint to the wireless core
- * what it believes should be the current regulatory domain by
- * giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
- * domain should be in.
+ * what it believes should be the current regulatory domain by giving it an
+ * ISO/IEC 3166 alpha2 country code it knows its regulatory domain should be
+ * in.
*
* Returns zero if all went fine, %-EALREADY if a regulatory domain had
* already been set or other standard error codes.
*
*/
extern int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
- const char *alpha2);
+ const char *alpha2, u32 country_ie_checksum,
+ enum environment_cap country_ie_env);
#endif /* __NET_WIRELESS_REG_H */