#include <net/cfg80211.h>
#include "core.h"
#include "reg.h"
+#include "regdb.h"
#include "nl80211.h"
+#ifdef CONFIG_CFG80211_REG_DEBUG
+#define REG_DBG_PRINT(format, args...) \
+ do { \
+ printk(KERN_DEBUG format , ## args); \
+ } while (0)
+#else
+#define REG_DBG_PRINT(args...)
+#endif
+
/* Receipt of information from last regulatory request */
static struct regulatory_request *last_request;
module_param(ieee80211_regdom, charp, 0444);
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
-#ifdef CONFIG_WIRELESS_OLD_REGULATORY
-/*
- * 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_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..48 */
- REG_RULE(5180-10, 5240+10, 40, 6, 17, 0),
- /* IEEE 802.11a, channels 48..64 */
- REG_RULE(5260-10, 5320+10, 40, 6, 20, NL80211_RRF_DFS),
- /* IEEE 802.11a, channels 100..124 */
- REG_RULE(5500-10, 5590+10, 40, 6, 20, NL80211_RRF_DFS),
- /* IEEE 802.11a, channels 132..144 */
- REG_RULE(5660-10, 5700+10, 40, 6, 20, NL80211_RRF_DFS),
- /* IEEE 802.11a, channels 149..165, outdoor */
- REG_RULE(5745-10, 5825+10, 40, 6, 30, 0),
- }
-};
-
-static const struct ieee80211_regdomain jp_regdom = {
- .n_reg_rules = 6,
- .alpha2 = "JP",
- .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, 0),
- /* IEEE 802.11b/g, channel 14 */
- REG_RULE(2484-10, 2484+10, 20, 6, 20, NL80211_RRF_NO_OFDM),
- /* IEEE 802.11a, channels 36..48 */
- REG_RULE(5180-10, 5240+10, 40, 6, 20, 0),
- /* IEEE 802.11a, channels 52..64 */
- REG_RULE(5260-10, 5320+10, 40, 6, 20, NL80211_RRF_DFS),
- /* IEEE 802.11a, channels 100..144 */
- REG_RULE(5500-10, 5700+10, 40, 6, 23, 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;
- /* Use world roaming rules for "EU", since it was a pseudo
- domain anyway... */
- if (alpha2[0] == 'E' && alpha2[1] == 'U')
- return &world_regdom;
- /* Default, world roaming rules */
- return &world_regdom;
-}
-
-static bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
-{
- if (rd == &us_regdom || rd == &jp_regdom || rd == &world_regdom)
- return true;
- return false;
-}
-#else
-static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
-{
- return false;
-}
-#endif
-
static void reset_regdomains(void)
{
/* avoid freeing static information or freeing something twice */
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);
return false;
}
+static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
+ const struct ieee80211_regdomain *src_regd)
+{
+ struct ieee80211_regdomain *regd;
+ int size_of_regd = 0;
+ unsigned int i;
+
+ size_of_regd = sizeof(struct ieee80211_regdomain) +
+ ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule));
+
+ regd = kzalloc(size_of_regd, GFP_KERNEL);
+ if (!regd)
+ return -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));
+
+ *dst_regd = regd;
+ return 0;
+}
+
+#ifdef CONFIG_CFG80211_INTERNAL_REGDB
+struct reg_regdb_search_request {
+ char alpha2[2];
+ struct list_head list;
+};
+
+static LIST_HEAD(reg_regdb_search_list);
+static DEFINE_SPINLOCK(reg_regdb_search_lock);
+
+static void reg_regdb_search(struct work_struct *work)
+{
+ struct reg_regdb_search_request *request;
+ const struct ieee80211_regdomain *curdom, *regdom;
+ int i, r;
+
+ spin_lock(®_regdb_search_lock);
+ while (!list_empty(®_regdb_search_list)) {
+ request = list_first_entry(®_regdb_search_list,
+ struct reg_regdb_search_request,
+ list);
+ list_del(&request->list);
+
+ for (i=0; i<reg_regdb_size; i++) {
+ curdom = reg_regdb[i];
+
+ if (!memcmp(request->alpha2, curdom->alpha2, 2)) {
+ r = reg_copy_regd(®dom, curdom);
+ if (r)
+ break;
+ spin_unlock(®_regdb_search_lock);
+ mutex_lock(&cfg80211_mutex);
+ set_regdom(regdom);
+ mutex_unlock(&cfg80211_mutex);
+ spin_lock(®_regdb_search_lock);
+ break;
+ }
+ }
+
+ kfree(request);
+ }
+ spin_unlock(®_regdb_search_lock);
+}
+
+static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
+
+static void reg_regdb_query(const char *alpha2)
+{
+ struct reg_regdb_search_request *request;
+
+ if (!alpha2)
+ return;
+
+ request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL);
+ if (!request)
+ return;
+
+ memcpy(request->alpha2, alpha2, 2);
+
+ spin_lock(®_regdb_search_lock);
+ list_add_tail(&request->list, ®_regdb_search_list);
+ spin_unlock(®_regdb_search_lock);
+
+ schedule_work(®_regdb_work);
+}
+#else
+static inline void reg_regdb_query(const char *alpha2) {}
+#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
+
/*
* This lets us keep regulatory code which is updated on a regulatory
* basis in userspace.
printk(KERN_INFO "cfg80211: Calling CRDA to update world "
"regulatory domain\n");
+ /* query internal regulatory database (if it exists) */
+ reg_regdb_query(alpha2);
+
country_env[8] = alpha2[0];
country_env[9] = alpha2[1];
}
/*
+ * This is a work around for sanity checking ieee80211_channel_to_frequency()'s
+ * work. ieee80211_channel_to_frequency() can for example currently provide a
+ * 2 GHz channel when in fact a 5 GHz channel was desired. An example would be
+ * an AP providing channel 8 on a country IE triplet when it sent this on the
+ * 5 GHz band, that channel is designed to be channel 8 on 5 GHz, not a 2 GHz
+ * channel.
+ *
+ * This can be removed once ieee80211_channel_to_frequency() takes in a band.
+ */
+static bool chan_in_band(int chan, enum ieee80211_band band)
+{
+ int center_freq = ieee80211_channel_to_frequency(chan);
+
+ switch (band) {
+ case IEEE80211_BAND_2GHZ:
+ if (center_freq <= 2484)
+ return true;
+ return false;
+ case IEEE80211_BAND_5GHZ:
+ if (center_freq >= 5005)
+ return true;
+ return false;
+ default:
+ return false;
+ }
+}
+
+/*
+ * Some APs may send a country IE triplet for each channel they
+ * support and while this is completely overkill and silly we still
+ * need to support it. We avoid making a single rule for each channel
+ * though and to help us with this we use this helper to find the
+ * actual subband end channel. These type of country IE triplet
+ * scenerios are handled then, all yielding two regulaotry rules from
+ * parsing a country IE:
+ *
+ * [1]
+ * [2]
+ * [36]
+ * [40]
+ *
+ * [1]
+ * [2-4]
+ * [5-12]
+ * [36]
+ * [40-44]
+ *
+ * [1-4]
+ * [5-7]
+ * [36-44]
+ * [48-64]
+ *
+ * [36-36]
+ * [40-40]
+ * [44-44]
+ * [48-48]
+ * [52-52]
+ * [56-56]
+ * [60-60]
+ * [64-64]
+ * [100-100]
+ * [104-104]
+ * [108-108]
+ * [112-112]
+ * [116-116]
+ * [120-120]
+ * [124-124]
+ * [128-128]
+ * [132-132]
+ * [136-136]
+ * [140-140]
+ *
+ * Returns 0 if the IE has been found to be invalid in the middle
+ * somewhere.
+ */
+static int max_subband_chan(enum ieee80211_band band,
+ int orig_cur_chan,
+ int orig_end_channel,
+ s8 orig_max_power,
+ u8 **country_ie,
+ u8 *country_ie_len)
+{
+ u8 *triplets_start = *country_ie;
+ u8 len_at_triplet = *country_ie_len;
+ int end_subband_chan = orig_end_channel;
+
+ /*
+ * We'll deal with padding for the caller unless
+ * its not immediate and we don't process any channels
+ */
+ if (*country_ie_len == 1) {
+ *country_ie += 1;
+ *country_ie_len -= 1;
+ return orig_end_channel;
+ }
+
+ /* Move to the next triplet and then start search */
+ *country_ie += 3;
+ *country_ie_len -= 3;
+
+ if (!chan_in_band(orig_cur_chan, band))
+ return 0;
+
+ while (*country_ie_len >= 3) {
+ int end_channel = 0;
+ struct ieee80211_country_ie_triplet *triplet =
+ (struct ieee80211_country_ie_triplet *) *country_ie;
+ int cur_channel = 0, next_expected_chan;
+
+ /* means last triplet is completely unrelated to this one */
+ if (triplet->ext.reg_extension_id >=
+ IEEE80211_COUNTRY_EXTENSION_ID) {
+ *country_ie -= 3;
+ *country_ie_len += 3;
+ break;
+ }
+
+ if (triplet->chans.first_channel == 0) {
+ *country_ie += 1;
+ *country_ie_len -= 1;
+ if (*country_ie_len != 0)
+ return 0;
+ break;
+ }
+
+ if (triplet->chans.num_channels == 0)
+ return 0;
+
+ /* Monitonically increasing channel order */
+ if (triplet->chans.first_channel <= end_subband_chan)
+ return 0;
+
+ if (!chan_in_band(triplet->chans.first_channel, band))
+ return 0;
+
+ /* 2 GHz */
+ if (triplet->chans.first_channel <= 14) {
+ end_channel = triplet->chans.first_channel +
+ triplet->chans.num_channels - 1;
+ }
+ else {
+ end_channel = triplet->chans.first_channel +
+ (4 * (triplet->chans.num_channels - 1));
+ }
+
+ if (!chan_in_band(end_channel, band))
+ return 0;
+
+ if (orig_max_power != triplet->chans.max_power) {
+ *country_ie -= 3;
+ *country_ie_len += 3;
+ break;
+ }
+
+ cur_channel = triplet->chans.first_channel;
+
+ /* The key is finding the right next expected channel */
+ if (band == IEEE80211_BAND_2GHZ)
+ next_expected_chan = end_subband_chan + 1;
+ else
+ next_expected_chan = end_subband_chan + 4;
+
+ if (cur_channel != next_expected_chan) {
+ *country_ie -= 3;
+ *country_ie_len += 3;
+ break;
+ }
+
+ end_subband_chan = end_channel;
+
+ /* Move to the next one */
+ *country_ie += 3;
+ *country_ie_len -= 3;
+
+ /*
+ * Padding needs to be dealt with if we processed
+ * some channels.
+ */
+ if (*country_ie_len == 1) {
+ *country_ie += 1;
+ *country_ie_len -= 1;
+ break;
+ }
+
+ /* If seen, the IE is invalid */
+ if (*country_ie_len == 2)
+ return 0;
+ }
+
+ if (end_subband_chan == orig_end_channel) {
+ *country_ie = triplets_start;
+ *country_ie_len = len_at_triplet;
+ return orig_end_channel;
+ }
+
+ return end_subband_chan;
+}
+
+/*
* 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(
+ enum ieee80211_band band,
u8 *country_ie,
u8 country_ie_len,
u32 *checksum)
continue;
}
+ /*
+ * APs can add padding to make length divisible
+ * by two, required by the spec.
+ */
+ if (triplet->chans.first_channel == 0) {
+ country_ie++;
+ country_ie_len--;
+ /* This is expected to be at the very end only */
+ if (country_ie_len != 0)
+ return NULL;
+ break;
+ }
+
+ if (triplet->chans.num_channels == 0)
+ return NULL;
+
+ if (!chan_in_band(triplet->chans.first_channel, band))
+ return NULL;
+
/* 2 GHz */
- if (triplet->chans.first_channel <= 14)
+ if (band == IEEE80211_BAND_2GHZ)
end_channel = triplet->chans.first_channel +
- triplet->chans.num_channels;
+ triplet->chans.num_channels - 1;
else
/*
* 5 GHz -- For example in country IEs if the first
(4 * (triplet->chans.num_channels - 1));
cur_channel = triplet->chans.first_channel;
+
+ /*
+ * Enhancement for APs that send a triplet for every channel
+ * or for whatever reason sends triplets with multiple channels
+ * separated when in fact they should be together.
+ */
+ end_channel = max_subband_chan(band,
+ cur_channel,
+ end_channel,
+ triplet->chans.max_power,
+ &country_ie,
+ &country_ie_len);
+ if (!end_channel)
+ return NULL;
+
+ if (!chan_in_band(end_channel, band))
+ return NULL;
+
cur_sub_max_channel = end_channel;
/* Basic sanity check */
last_sub_max_channel = cur_sub_max_channel;
- country_ie += 3;
- country_ie_len -= 3;
num_rules++;
+ if (country_ie_len >= 3) {
+ country_ie += 3;
+ country_ie_len -= 3;
+ }
+
/*
* Note: this is not a IEEE requirement but
* simply a memory requirement
continue;
}
+ if (triplet->chans.first_channel == 0) {
+ country_ie++;
+ country_ie_len--;
+ break;
+ }
+
reg_rule = &rd->reg_rules[i];
freq_range = ®_rule->freq_range;
power_rule = ®_rule->power_rule;
reg_rule->flags = flags;
/* 2 GHz */
- if (triplet->chans.first_channel <= 14)
+ if (band == IEEE80211_BAND_2GHZ)
end_channel = triplet->chans.first_channel +
- triplet->chans.num_channels;
+ triplet->chans.num_channels -1;
else
end_channel = triplet->chans.first_channel +
(4 * (triplet->chans.num_channels - 1));
+ end_channel = max_subband_chan(band,
+ triplet->chans.first_channel,
+ end_channel,
+ triplet->chans.max_power,
+ &country_ie,
+ &country_ie_len);
+
/*
* The +10 is since the regulatory domain expects
* the actual band edge, not the center of freq for
*/
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);
+ power_rule->max_eirp = DBM_TO_MBM(triplet->chans.max_power);
- country_ie += 3;
- country_ie_len -= 3;
i++;
+ if (country_ie_len >= 3) {
+ country_ie += 3;
+ country_ie_len -= 3;
+ }
+
BUG_ON(i > NL80211_MAX_SUPP_REG_RULES);
}
if (r == -ERANGE &&
last_request->initiator ==
NL80211_REGDOM_SET_BY_COUNTRY_IE) {
-#ifdef CONFIG_CFG80211_REG_DEBUG
- printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz "
+ REG_DBG_PRINT("cfg80211: Leaving channel %d MHz "
"intact on %s - no rule found in band on "
"Country IE\n",
- chan->center_freq, wiphy_name(wiphy));
-#endif
+ chan->center_freq, wiphy_name(wiphy));
} else {
/*
* In this case we know the country IE has at least one reg rule
* for the band so we respect its band definitions
*/
-#ifdef CONFIG_CFG80211_REG_DEBUG
if (last_request->initiator ==
NL80211_REGDOM_SET_BY_COUNTRY_IE)
- printk(KERN_DEBUG "cfg80211: Disabling "
+ REG_DBG_PRINT("cfg80211: Disabling "
"channel %d MHz on %s due to "
"Country IE\n",
chan->center_freq, wiphy_name(wiphy));
-#endif
flags |= IEEE80211_CHAN_DISABLED;
chan->flags = flags;
}
}
EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
-static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
- const struct ieee80211_regdomain *src_regd)
-{
- struct ieee80211_regdomain *regd;
- int size_of_regd = 0;
- unsigned int i;
-
- size_of_regd = sizeof(struct ieee80211_regdomain) +
- ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule));
-
- regd = kzalloc(size_of_regd, GFP_KERNEL);
- if (!regd)
- return -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));
-
- *dst_regd = regd;
- return 0;
-}
-
/*
* Return value which can be used by ignore_request() to indicate
* it has been determined we should intersect two regulatory domains
return REG_INTERSECT;
case NL80211_REGDOM_SET_BY_DRIVER:
if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) {
- if (is_old_static_regdom(cfg80211_regdomain))
- return 0;
if (regdom_changes(pending_request->alpha2))
return 0;
return -EALREADY;
return -EAGAIN;
}
- if (!is_old_static_regdom(cfg80211_regdomain) &&
- !regdom_changes(pending_request->alpha2))
+ if (!regdom_changes(pending_request->alpha2))
return -EALREADY;
return 0;
request->alpha2[1] = alpha2[1];
request->initiator = NL80211_REGDOM_SET_BY_CORE;
- queue_regulatory_request(request);
-
/*
* This ensures last_request is populated once modules
* come swinging in and calling regulatory hints and
* wiphy_apply_custom_regulatory().
*/
- flush_scheduled_work();
+ reg_process_hint(request);
return 0;
}
request->wiphy_idx = WIPHY_IDX_STALE;
request->alpha2[0] = alpha2[0];
request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_USER,
+ request->initiator = NL80211_REGDOM_SET_BY_USER;
queue_regulatory_request(request);
* therefore cannot iterate over the rdev list here.
*/
void regulatory_hint_11d(struct wiphy *wiphy,
- u8 *country_ie,
- u8 country_ie_len)
+ enum ieee80211_band band,
+ u8 *country_ie,
+ u8 country_ie_len)
{
struct ieee80211_regdomain *rd = NULL;
char alpha2[2];
wiphy_idx_valid(last_request->wiphy_idx)))
goto out;
- rd = country_ie_2_rd(country_ie, country_ie_len, &checksum);
- if (!rd)
+ rd = country_ie_2_rd(band, country_ie, country_ie_len, &checksum);
+ if (!rd) {
+ REG_DBG_PRINT("cfg80211: Ignoring bogus country IE\n");
goto out;
+ }
/*
* This will not happen right now but we leave it here for the
if (!reg_beacon)
return -ENOMEM;
-#ifdef CONFIG_CFG80211_REG_DEBUG
- printk(KERN_DEBUG "cfg80211: Found new beacon on "
- "frequency: %d MHz (Ch %d) on %s\n",
- beacon_chan->center_freq,
- ieee80211_frequency_to_channel(beacon_chan->center_freq),
- wiphy_name(wiphy));
-#endif
+ REG_DBG_PRINT("cfg80211: Found new beacon on "
+ "frequency: %d MHz (Ch %d) on %s\n",
+ beacon_chan->center_freq,
+ ieee80211_frequency_to_channel(beacon_chan->center_freq),
+ wiphy_name(wiphy));
+
memcpy(®_beacon->chan, beacon_chan,
sizeof(struct ieee80211_channel));
* 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_changes(rd->alpha2))
+ if (!regdom_changes(rd->alpha2))
return -EINVAL;
}
spin_lock_init(®_requests_lock);
spin_lock_init(®_pending_beacons_lock);
-#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);
-#else
cfg80211_regdomain = cfg80211_world_regdom;
-#endif
/* We always try to get an update for the static regdomain */
err = regulatory_hint_core(cfg80211_regdomain->alpha2);
if (err) {
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff