This utility functions is needed to convert an chandef to an operating
class. It will be used in extended channel switch announcements.
Signed-off-by: Simon Wunderlich <siwu@xxxxxxxxxxxxxxxxxx>
---
include/net/cfg80211.h | 11 +++
net/wireless/util.c | 193 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 204 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 26e9113..f46ac71 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -4061,6 +4061,17 @@ void cfg80211_ch_switch_notify(struct net_device *dev,
bool ieee80211_operating_class_to_band(u8 operating_class,
enum ieee80211_band *band);
+/**
+ * ieee80211_operating_class_to_band - convert operating class to band
+ *
+ * @band: pointer to chandef
+ * @operating_class: the operating class to fill
+ *
+ * Returns %true if the conversion was successful, %false otherwise.
+ */
+bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
+ u8 *operating_class);
+
/*
* cfg80211_tdls_oper_request - request userspace to perform TDLS operation
* @dev: the device on which the operation is requested
diff --git a/net/wireless/util.c b/net/wireless/util.c
index bb52486..50703bf 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1178,6 +1178,199 @@ bool ieee80211_operating_class_to_band(u8 operating_class,
}
EXPORT_SYMBOL(ieee80211_operating_class_to_band);
+/* return operating class according to IEEE 802.11-12 Table E-4 */
+bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
+ u8 *operating_class)
+{
+ int ch_num;
+ enum nl80211_channel_type ch_type;
+
+ switch (chandef->width) {
+ case NL80211_CHAN_WIDTH_20_NOHT:
+ case NL80211_CHAN_WIDTH_20:
+ case NL80211_CHAN_WIDTH_40:
+ break;
+ default:
+ /*
+ * this function does not support narrow (5, 10 MHz)
+ * or wide (80, 160 MHz) channels.
+ */
+ return false;
+ }
+
+ ch_type = cfg80211_get_chandef_type(chandef);
+ ch_num = ieee80211_frequency_to_channel(chandef->chan->center_freq);
+
+ if (chandef->chan->band == IEEE80211_BAND_2GHZ) {
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ if (ch_num == 14) {
+ *operating_class = 82;
+ return true;
+ }
+ *operating_class = 81;
+ return true;
+ case NL80211_CHAN_HT40PLUS:
+ *operating_class = 83;
+ return true;
+ case NL80211_CHAN_HT40MINUS:
+ *operating_class = 84;
+ return true;
+ default:
+ return false;
+ }
+ }
+ if (chandef->chan->band != IEEE80211_BAND_5GHZ)
+ return false;
+
+ /* TODO: handle operating class with 5 MHz and 10 MHz channel width */
+ switch (ch_num) {
+ case 8:
+ case 12:
+ case 16:
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ *operating_class = 112;
+ return true;
+ default:
+ return false;
+ }
+ break;
+ case 36:
+ case 40:
+ case 44:
+ case 48:
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ *operating_class = 115;
+ return true;
+ case NL80211_CHAN_HT40PLUS:
+ *operating_class = 116;
+ return true;
+ case NL80211_CHAN_HT40MINUS:
+ *operating_class = 117;
+ return true;
+ default:
+ return false;
+ }
+ break;
+ case 52:
+ case 56:
+ case 60:
+ case 64:
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ *operating_class = 118;
+ return true;
+ case NL80211_CHAN_HT40PLUS:
+ *operating_class = 119;
+ return true;
+ case NL80211_CHAN_HT40MINUS:
+ *operating_class = 120;
+ return true;
+ default:
+ return false;
+ }
+ break;
+ case 100:
+ case 104:
+ case 108:
+ case 112:
+ case 116:
+ case 120:
+ case 124:
+ case 128:
+ case 132:
+ case 136:
+ case 140:
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ *operating_class = 121;
+ return true;
+ case NL80211_CHAN_HT40PLUS:
+ *operating_class = 122;
+ return true;
+ case NL80211_CHAN_HT40MINUS:
+ *operating_class = 123;
+ return true;
+ default:
+ return false;
+ }
+ break;
+ case 149:
+ case 153:
+ case 157:
+ case 161:
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ /*
+ * NOTE: These channels are also included in operating
+ * class 125, marked as "LicenseExcemptBehavior".
+ */
+ *operating_class = 124;
+ return true;
+ case NL80211_CHAN_HT40PLUS:
+ *operating_class = 126;
+ return true;
+ case NL80211_CHAN_HT40MINUS:
+ *operating_class = 127;
+ return true;
+ default:
+ return false;
+ }
+ break;
+ case 165:
+ case 169:
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ *operating_class = 125;
+ return true;
+ default:
+ return false;
+ }
+ break;
+ case 184:
+ case 188:
+ case 192:
+ case 196:
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ *operating_class = 109;
+ return true;
+ case NL80211_CHAN_HT40PLUS:
+ *operating_class = 104;
+ return true;
+ case NL80211_CHAN_HT40MINUS:
+ *operating_class = 105;
+ return true;
+ default:
+ return false;
+ }
+ break;
+ case 191:
+ case 195:
+ switch (ch_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ *operating_class = 106;
+ return true;
+ default:
+ return false;
+ }
+ break;
+ }
+ return false;
+}
+EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
+
int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
u32 beacon_int)
{
--
1.7.10.4
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