Fix MCS set field to be based on driver info

Instead of using hardcoded Rx MCS bitmask (indexes 0..15 enabled),
use the real information from the driver capabilities.

hostapd/ieee802_11.c

@@ -120,9 +120,8 @@ u8 * hostapd_eid_ht_capabilities_info(struct hostapd_data *hapd, u8 *eid)
 		    MAX_RX_AMPDU_FACTOR_64KB);
 
 	cap->capabilities_info = host_to_le16(hapd->iconf->ht_capab);
-
-	cap->supported_mcs_set[0] = 0xff;
-	cap->supported_mcs_set[1] = 0xff;
+	os_memcpy(cap->supported_mcs_set, hapd->iface->current_mode->mcs_set,
+		  16);
 
  	pos += sizeof(*cap);
 

src/drivers/driver.h

@@ -51,6 +51,7 @@ struct hostapd_hw_modes {
 	int num_rates;
 	struct hostapd_rate_data *rates;
 	u16 ht_capab;
+	u8 mcs_set[16];
 };
 
 

src/drivers/driver_nl80211.c

@@ -2229,6 +2229,13 @@ static int phy_info_handler(struct nl_msg *msg, void *arg)
 				tb_band[NL80211_BAND_ATTR_HT_CAPA]);
 		}
 
+		if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
+		    nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
+			u8 *mcs;
+			mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
+			os_memcpy(mode->mcs_set, mcs, 16);
+		}
+
 		nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
 			nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
 				  nla_len(nl_freq), freq_policy);