/// <summary>
/// Start a connection of Tcp Client Socket
/// </summary>
void StartWork(object obj)
{
//set Terminate flag
TerminateFlag.Reset();
Active = true;
// Connect to a remote device.
try
{
IPEndPoint remoteEP = new IPEndPoint(IpAddress, Port);
// Create Udp Client
Udp = new UdpClient(remoteEP);
// Create the state object.
UdpStateObject state = new UdpStateObject();
state.client = Udp;
state.ep = remoteEP;
// Connect to the remote endpoint
Udp.BeginReceive(ReadCallback, state);
//wait until stop is called
TerminateFlag.WaitOne();
// Release the socket.
Udp.Close();
Active = false;
}
catch (Exception e)
{
Active = false;
Console.WriteLine(e.ToString());
}
}
/// <summary>
/// Read a Callback send from client
/// </summary>
/// <param name="ar"></param>
void ReadCallback(IAsyncResult ar)
{
try
{
UdpStateObject state = (UdpStateObject)(ar.AsyncState);
// Read data from the remote device.
UdpClient client = state.client;
IPEndPoint ep = state.ep;
byte[] buffer = client.EndReceive(ar, ref ep);
if (buffer.Length > 0)
{
// There might be more data, so store the data received so far.
state.message.AddRange(buffer);
//trigger new message event
if (PackageReceived != null)
{
PackageReceived(state.message.ToArray());
}
}
//establish new message and read more
UdpStateObject newState = new UdpStateObject();
newState.client = client;
newState.ep = ep;
client.BeginReceive(new AsyncCallback(ReadCallback), newState);
}
catch (Exception)
{
//re-initialize receive callback
UdpStateObject state = (UdpStateObject)(ar.AsyncState);
// Read data from the remote device.
UdpClient client = state.client;
IPEndPoint ep = state.ep;
//establish new message and read more
UdpStateObject newState = new UdpStateObject();
newState.client = client;
newState.ep = ep;
while (true)
{
try
{
client.BeginReceive(new AsyncCallback(ReadCallback), newState);
break;
}
catch (Exception)
{ }
}
}
}
