IAsyncResult IDnsClient.BeginProcess(Request request, AsyncCallback callback, object state)
{
if (object.ReferenceEquals(null, request))
{
throw new ArgumentNullException("request");
}
Internal.AsyncResult <Response> result = new Internal.AsyncResult <Response>(callback, state);
// create request datagram, prefixed with the two byte length field
Datagram qdata = Datagram.GetPrefixed(request.Data);
NetworkStream ns = base.GetStream();
if (RequestSending != null)
{
RequestSending(this, new MessageEventArgs(request, ns, (IPEndPoint)Client.RemoteEndPoint));
}
// LogMessage
LogRequest(qdata.Length);
// asynchronously send prefixed request message
request.SetTimestamp();
ns.BeginWrite(qdata, 0, qdata.Length, new AsyncCallback(AsyncRequestWritten), result);
return(result);
}
IAsyncResult IDnsClient.BeginProcess(Request request, AsyncCallback callback, object state)
{
Internal.AsyncResult <Response> result = new Internal.AsyncResult <Response>(callback, state);
// send request
Datagram qdata = request.Data;
if (qdata.Length > DatagramMaxLength) // can actually never happen
{
throw new InvalidOperationException(String.Format(
"Request message length exceeds {0} bytes.", DatagramMaxLength));
}
// LogMessage
LogRequest(qdata.Length);
request.SetTimestamp();
base.BeginSend(qdata, qdata.Length, RemoteEP, new AsyncCallback(AsyncRequestSent), result);
return(result);
}