VHT: Add configuration of operating center frequency

Signed-hostap: Mahesh Palivela <maheshp@posedge.com>

hostapd/config_file.c

@@ -2226,6 +2226,9 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 			conf->require_vht = atoi(pos);
 		} else if (os_strcmp(buf, "vht_oper_chwidth") == 0) {
 			conf->vht_oper_chwidth = atoi(pos);
+		} else if (os_strcmp(buf, "vht_oper_centr_freq_seg0_idx") == 0)
+		{
+			conf->vht_oper_centr_freq_seg0_idx = atoi(pos);
 #endif /* CONFIG_IEEE80211AC */
 		} else if (os_strcmp(buf, "max_listen_interval") == 0) {
 			bss->max_listen_interval = atoi(pos);

hostapd/hostapd.conf

@@ -559,6 +559,12 @@ wmm_ac_vo_acm=0
 # 2 = 160 MHz channel width
 # 3 = 80+80 MHz channel width
 #vht_oper_chwidth=1
+#
+# center freq = 5 GHz + (5 * index)
+# So index 42 gives center freq 5.210 GHz
+# which is channel 42 in 5G band
+#
+#vht_oper_centr_freq_seg0_idx=42
 
 ##### IEEE 802.1X-2004 related configuration ##################################
 

src/ap/ap_config.h

@@ -478,6 +478,7 @@ struct hostapd_config {
 	int ieee80211ac;
 	int require_vht;
 	u8 vht_oper_chwidth;
+	u8 vht_oper_centr_freq_seg0_idx;
 };
 
 

src/ap/ieee802_11_vht.c

@@ -61,6 +61,14 @@ u8 * hostapd_eid_vht_operation(struct hostapd_data *hapd, u8 *eid)
 	oper = (struct ieee80211_vht_operation *) pos;
 	os_memset(oper, 0, sizeof(*oper));
 
+	/*
+	 * center freq = 5 GHz + (5 * index)
+	 * So index 42 gives center freq 5.210 GHz
+	 * which is channel 42 in 5G band
+	 */
+	oper->vht_op_info_chan_center_freq_seg0_idx =
+		hapd->iconf->vht_oper_centr_freq_seg0_idx;
+
 	oper->vht_op_info_chwidth = hapd->iconf->vht_oper_chwidth;
 
 	/* VHT Basic MCS set comes from hw */