static void DNP3Response(LinkLayer ll, TransportLayer tl, ApplicationLayer al, ref byte[] buffer)
{
var appData = ApplicationLayer.ApplicationResponse(al);
al.ApplicationData = appData;
var transData = TransportLayer.TransportResponse(tl, al);
tl.TransportData = transData;
var linkData = LinkLayer.LinkResponse(ll, tl);
buffer = linkData;
}