DPP2: Configurator Connectivity indication

Add a new hostapd configuration parameter
dpp_configurator_connectivity=1 to request Configurator connectivity to
be advertised for chirping Enrollees.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>

hostapd/config_file.c

@@ -4408,6 +4408,8 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 	} else if (os_strcmp(buf, "dpp_controller") == 0) {
 		if (hostapd_dpp_controller_parse(bss, pos))
 			return 1;
+	} else if (os_strcmp(buf, "dpp_configurator_connectivity") == 0) {
+		bss->dpp_configurator_connectivity = atoi(pos);
 #endif /* CONFIG_DPP2 */
 #endif /* CONFIG_DPP */
 #ifdef CONFIG_OWE

hostapd/hostapd.conf

@@ -2304,6 +2304,11 @@ own_ip_addr=127.0.0.1
 #dpp_csign
 #dpp_controller
 
+# Configurator Connectivity indication
+# 0: no Configurator is currently connected (default)
+# 1: advertise that a Configurator is available
+#dpp_configurator_connectivity=0
+
 #### TDLS (IEEE 802.11z-2010) #################################################
 
 # Prohibit use of TDLS in this BSS

src/ap/ap_config.h

@@ -740,6 +740,7 @@ struct hostapd_bss_config {
 	struct wpabuf *dpp_csign;
 #ifdef CONFIG_DPP2
 	struct dpp_controller_conf *dpp_controller;
+	int dpp_configurator_connectivity;
 #endif /* CONFIG_DPP2 */
 #endif /* CONFIG_DPP */
 

src/ap/beacon.c

@@ -468,6 +468,7 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 
 	buflen += hostapd_mbo_ie_len(hapd);
 	buflen += hostapd_eid_owe_trans_len(hapd);
+	buflen += hostapd_eid_dpp_cc_len(hapd);
 
 	resp = os_zalloc(buflen);
 	if (resp == NULL)
@@ -612,6 +613,7 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 
 	pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
 	pos = hostapd_eid_owe_trans(hapd, pos, (u8 *) resp + buflen - pos);
+	pos = hostapd_eid_dpp_cc(hapd, pos, (u8 *) resp + buflen - pos);
 
 	if (hapd->conf->vendor_elements) {
 		os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
@@ -1164,6 +1166,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 
 	tail_len += hostapd_mbo_ie_len(hapd);
 	tail_len += hostapd_eid_owe_trans_len(hapd);
+	tail_len += hostapd_eid_dpp_cc_len(hapd);
 
 	tailpos = tail = os_malloc(tail_len);
 	if (head == NULL || tail == NULL) {
@@ -1328,6 +1331,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 	tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
 	tailpos = hostapd_eid_owe_trans(hapd, tailpos,
 					tail + tail_len - tailpos);
+	tailpos = hostapd_eid_dpp_cc(hapd, tailpos, tail + tail_len - tailpos);
 
 	if (hapd->conf->vendor_elements) {
 		os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),

src/ap/ieee802_11.h

@@ -183,6 +183,9 @@ void handle_auth_fils(struct hostapd_data *hapd, struct sta_info *sta,
 size_t hostapd_eid_owe_trans_len(struct hostapd_data *hapd);
 u8 * hostapd_eid_owe_trans(struct hostapd_data *hapd, u8 *eid, size_t len);
 
+size_t hostapd_eid_dpp_cc_len(struct hostapd_data *hapd);
+u8 * hostapd_eid_dpp_cc(struct hostapd_data *hapd, u8 *eid, size_t len);
+
 int get_tx_parameters(struct sta_info *sta, int ap_max_chanwidth,
 		      int ap_seg1_idx, int *bandwidth, int *seg1_idx);
 

src/ap/ieee802_11_shared.c

@@ -874,6 +874,36 @@ u8 * hostapd_eid_owe_trans(struct hostapd_data *hapd, u8 *eid,
 }
 
 
+size_t hostapd_eid_dpp_cc_len(struct hostapd_data *hapd)
+{
+#ifdef CONFIG_DPP2
+	if (hapd->conf->dpp_configurator_connectivity)
+		return 6;
+#endif /* CONFIG_DPP2 */
+	return 0;
+}
+
+
+u8 * hostapd_eid_dpp_cc(struct hostapd_data *hapd, u8 *eid, size_t len)
+{
+#ifdef CONFIG_DPP2
+	u8 *pos = eid;
+
+	if (!hapd->conf->dpp_configurator_connectivity || len < 6)
+		return pos;
+
+	*pos++ = WLAN_EID_VENDOR_SPECIFIC;
+	*pos++ = 4;
+	WPA_PUT_BE24(pos, OUI_WFA);
+	pos += 3;
+	*pos++ = DPP_CC_OUI_TYPE;
+
+	return pos;
+#endif /* CONFIG_DPP2 */
+	return eid;
+}
+
+
 void ap_copy_sta_supp_op_classes(struct sta_info *sta,
 				 const u8 *supp_op_classes,
 				 size_t supp_op_classes_len)