winbox: add UDP port range

Wine needs to listen to UDP ports 40k to 50k. Winbox can
use these ports to discover and connect.

Signed-off-by: Armin Mahdilou <[e-mail]>

nixos/modules/programs/winbox.nix

···
 
   config = lib.mkIf cfg.enable {
     environment.systemPackages = [ cfg.package ];
-    networking.firewall.allowedUDPPorts = lib.optionals cfg.openFirewall [ 5678 ];
+    networking.firewall = lib.mkIf cfg.openFirewall {
+      allowedUDPPorts = [ 5678 ];
+      allowedUDPPortRanges = [
+        {
+          from = 40000;
+          to = 50000;
+        }
+      ];
+    };
   };
 }