wpa_supplicant: Avoid associating to temp disabled SSID in ap_scan=2

In ap_scan=2 mode, wpa_supplicant_assoc_try() did not check whether the
SSID is temporarily disabled before trying to associate and this may
result in an infinite connect/disconnect loop. If the association
succeeds while the SSID is temporarily disabled, wpa_supplicant will
request to deauthenticate and that in turn will cause the SSID to be
temporarily disabled again. Fix that by postponing the association until
the SSID is no longer temporarily disabled.

Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>

wpa_supplicant/events.c

@@ -54,8 +54,7 @@ static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s,
 #endif /* CONFIG_NO_SCAN_PROCESSING */
 
 
-static int wpas_temp_disabled(struct wpa_supplicant *wpa_s,
-			      struct wpa_ssid *ssid)
+int wpas_temp_disabled(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 {
 	struct os_reltime now;
 

wpa_supplicant/scan.c

@@ -117,9 +117,19 @@ int wpa_supplicant_enabled_networks(struct wpa_supplicant *wpa_s)
 static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s,
 				     struct wpa_ssid *ssid)
 {
+	int min_temp_disabled = 0;
+
 	while (ssid) {
-		if (!wpas_network_disabled(wpa_s, ssid))
-			break;
+		if (!wpas_network_disabled(wpa_s, ssid)) {
+			int temp_disabled = wpas_temp_disabled(wpa_s, ssid);
+
+			if (temp_disabled <= 0)
+				break;
+
+			if (!min_temp_disabled ||
+			    temp_disabled < min_temp_disabled)
+				min_temp_disabled = temp_disabled;
+		}
 		ssid = ssid->next;
 	}
 
@@ -128,7 +138,7 @@ static void wpa_supplicant_assoc_try(struct wpa_supplicant *wpa_s,
 		wpa_dbg(wpa_s, MSG_DEBUG, "wpa_supplicant_assoc_try: Reached "
 			"end of scan list - go back to beginning");
 		wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
-		wpa_supplicant_req_scan(wpa_s, 0, 0);
+		wpa_supplicant_req_scan(wpa_s, min_temp_disabled, 0);
 		return;
 	}
 	if (ssid->next) {

wpa_supplicant/wpa_supplicant_i.h

@@ -1339,6 +1339,7 @@ void wnm_bss_keep_alive_deinit(struct wpa_supplicant *wpa_s);
 int wpa_supplicant_fast_associate(struct wpa_supplicant *wpa_s);
 struct wpa_bss * wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
 					     struct wpa_ssid **selected_ssid);
+int wpas_temp_disabled(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid);
 
 /* eap_register.c */
 int eap_register_methods(void);