HS 2.0: Allow CANCEL_FETCH_OSU to stop at scan completion

There is no need to start the GAS/ANQP fetch if the FETCH_OSU operation
has already been canceled.

Signed-off-by: Jouni Malinen <j@w1.fi>

wpa_supplicant/hs20_supplicant.c

@@ -831,6 +831,10 @@ static void hs20_osu_scan_res_handler(struct wpa_supplicant *wpa_s,
 				      struct wpa_scan_results *scan_res)
 {
 	wpa_printf(MSG_DEBUG, "OSU provisioning fetch scan completed");
+	if (!wpa_s->fetch_osu_waiting_scan) {
+		wpa_printf(MSG_DEBUG, "OSU fetch have been canceled");
+		return;
+	}
 	wpa_s->network_select = 0;
 	wpa_s->fetch_all_anqp = 1;
 	wpa_s->fetch_osu_info = 1;
@@ -879,6 +883,7 @@ int hs20_fetch_osu(struct wpa_supplicant *wpa_s)
 
 void hs20_start_osu_scan(struct wpa_supplicant *wpa_s)
 {
+	wpa_s->fetch_osu_waiting_scan = 1;
 	wpa_s->num_osu_scans++;
 	wpa_s->scan_req = MANUAL_SCAN_REQ;
 	wpa_s->scan_res_handler = hs20_osu_scan_res_handler;
@@ -890,6 +895,7 @@ void hs20_cancel_fetch_osu(struct wpa_supplicant *wpa_s)
 {
 	wpa_printf(MSG_DEBUG, "Cancel OSU fetch");
 	interworking_stop_fetch_anqp(wpa_s);
+	wpa_s->fetch_osu_waiting_scan = 0;
 	wpa_s->network_select = 0;
 	wpa_s->fetch_osu_info = 0;
 	wpa_s->fetch_osu_icon_in_progress = 0;

wpa_supplicant/interworking.c

@@ -2530,6 +2530,7 @@ 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->fetch_osu_waiting_scan &&
 			    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);

wpa_supplicant/wpa_supplicant_i.h

@@ -852,6 +852,7 @@ struct wpa_supplicant {
 	unsigned int auto_network_select:1;
 	unsigned int fetch_all_anqp:1;
 	unsigned int fetch_osu_info:1;
+	unsigned int fetch_osu_waiting_scan:1;
 	unsigned int fetch_osu_icon_in_progress:1;
 	struct wpa_bss *interworking_gas_bss;
 	unsigned int osu_icon_id;