HS 2.0R2: Try to scan multiple times for OSU providers

Scan operation is not that reliable, so try couple of times if no
OSU provider matches are found during fetch_osu command.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

wpa_supplicant/hs20_supplicant.c

@@ -385,6 +385,7 @@ void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
 	case HS20_STYPE_OSU_PROVIDERS_LIST:
 		wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 			" OSU Providers list", MAC2STR(sa));
+		wpa_s->num_prov_found++;
 		if (anqp) {
 			wpabuf_free(anqp->hs20_osu_providers_list);
 			anqp->hs20_osu_providers_list =
@@ -821,11 +822,20 @@ int hs20_fetch_osu(struct wpa_supplicant *wpa_s)
 	}
 
 	wpa_msg(wpa_s, MSG_INFO, "Starting OSU provisioning information fetch");
+	wpa_s->num_osu_scans = 0;
+	wpa_s->num_prov_found = 0;
+	hs20_start_osu_scan(wpa_s);
+
+	return 0;
+}
+
+
+void hs20_start_osu_scan(struct wpa_supplicant *wpa_s)
+{
+	wpa_s->num_osu_scans++;
 	wpa_s->scan_req = MANUAL_SCAN_REQ;
 	wpa_s->scan_res_handler = hs20_osu_scan_res_handler;
 	wpa_supplicant_req_scan(wpa_s, 0, 0);
-
-	return 0;
 }
 
 

wpa_supplicant/hs20_supplicant.h

@@ -32,5 +32,6 @@ void hs20_osu_icon_fetch(struct wpa_supplicant *wpa_s);
 int hs20_fetch_osu(struct wpa_supplicant *wpa_s);
 void hs20_cancel_fetch_osu(struct wpa_supplicant *wpa_s);
 void hs20_icon_fetch_failed(struct wpa_supplicant *wpa_s);
+void hs20_start_osu_scan(struct wpa_supplicant *wpa_s);
 
 #endif /* HS20_SUPPLICANT_H */

wpa_supplicant/interworking.c

@@ -2474,6 +2474,12 @@ static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
 
 	if (found == 0) {
 		if (wpa_s->fetch_osu_info) {
+			if (wpa_s->num_prov_found == 0 &&
+			    wpa_s->num_osu_scans < 3) {
+				wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again");
+				hs20_start_osu_scan(wpa_s);
+				return;
+			}
 			wpa_printf(MSG_DEBUG, "Interworking: Next icon");
 			hs20_osu_icon_fetch(wpa_s);
 			return;

wpa_supplicant/wpa_supplicant_i.h

@@ -778,6 +778,8 @@ struct wpa_supplicant {
 	struct osu_provider *osu_prov;
 	size_t osu_prov_count;
 	struct os_reltime osu_icon_fetch_start;
+	unsigned int num_osu_scans;
+	unsigned int num_prov_found;
 #endif /* CONFIG_INTERWORKING */
 	unsigned int drv_capa_known;