private static void ReceiveCallback(IAsyncResult ar)
{
ReceiveState state = (ReceiveState)ar.AsyncState;
try
{
state.m_socketObj.EndReceive(ar);
state.m_receivedFlag = true;
}
catch (Exception ex)
{
state.m_receivedFlag = false;
return;
//throw new UDPClientException("Error trying to get response from server", ex, UDPClientError.BadResponse);
}
}
private byte[] Transmit(byte[] request, int responseSize, bool doRetry)
{
ReceiveState state = new ReceiveState(m_client, m_received);
int retry = 0;
if (m_client.Connected == false)
{
return(null);
}
byte[] response = new byte[MAX_RESPONSE_SIZE];
List <ArraySegment <byte> > recvBuffers = new List <ArraySegment <byte> >();
for (int seg = 0; seg < 100; seg++)
{
recvBuffers.Add(new ArraySegment <byte>(response, seg * 65535, 65535));
}
while (retry <= MAX_RETRIES)
{
m_client.Send(request);
m_client.DontFragment = true;
m_received = false;
m_client.BeginReceive(recvBuffers, SocketFlags.None,
new AsyncCallback(ReceiveCallback), state);
DateTime transmitBegin = DateTime.Now;
TimeSpan timeWaiting = new TimeSpan(0, 0, 0);
while ((timeWaiting.TotalMilliseconds < EXPECTED_TIMEOUT[retry]) && (!state.m_receivedFlag))
{
System.Threading.Thread.Sleep(1000);
timeWaiting = DateTime.Now - transmitBegin;
}
m_received = state.m_receivedFlag;
if (m_received == false)
{
if (doRetry)
{
retry++;
}
else
{
break;
}
}
else
{
break;
}
}
m_received = false;
if (retry > MAX_RETRIES)
{
return(null); // we exhaust tentatives return null
}
else
{
return(response);
}
}
