Add support for hidden SSID in wpa_supplicant AP mode

This also disables WPS support if hidden SSID is enabled in AP mode.

Signed-off-by: Vivek Natarajan <nataraja@qca.qualcomm.com>
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

wpa_supplicant/ap.c

@@ -145,6 +145,8 @@ static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 	bss->ssid.ssid_len = ssid->ssid_len;
 	bss->ssid.ssid_set = 1;
 
+	bss->ignore_broadcast_ssid = ssid->ignore_broadcast_ssid;
+
 	if (ssid->auth_alg)
 		bss->auth_algs = ssid->auth_alg;
 
@@ -238,7 +240,10 @@ static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
 			      * configuration */
 #endif /* CONFIG_WPS2 */
 	bss->eap_server = 1;
-	bss->wps_state = 2;
+
+	if (!ssid->ignore_broadcast_ssid)
+		bss->wps_state = 2;
+
 	bss->ap_setup_locked = 2;
 	if (wpa_s->conf->config_methods)
 		bss->config_methods = os_strdup(wpa_s->conf->config_methods);

wpa_supplicant/config.c

@@ -1589,6 +1589,7 @@ static const struct parse_data ssid_fields[] = {
 	{ INT_RANGE(frequency, 0, 10000) },
 	{ INT(wpa_ptk_rekey) },
 	{ STR(bgscan) },
+	{ INT_RANGE(ignore_broadcast_ssid, 0, 2) },
 #ifdef CONFIG_P2P
 	{ FUNC(p2p_client_list) },
 #endif /* CONFIG_P2P */

wpa_supplicant/config_ssid.h

@@ -376,6 +376,20 @@ struct wpa_ssid {
 	 */
 	char *bgscan;
 
+	/**
+	 * ignore_broadcast_ssid - Hide SSID in AP mode
+	 *
+	 * Send empty SSID in beacons and ignore probe request frames that do
+	 * not specify full SSID, i.e., require stations to know SSID.
+	 * default: disabled (0)
+	 * 1 = send empty (length=0) SSID in beacon and ignore probe request
+	 * for broadcast SSID
+	 * 2 = clear SSID (ASCII 0), but keep the original length (this may be
+	 * required with some clients that do not support empty SSID) and
+	 * ignore probe requests for broadcast SSID
+	 */
+	int ignore_broadcast_ssid;
+
 	/**
 	 * freq_list - Array of allowed frequencies or %NULL for all
 	 *