private void HandleAsyncReceive(IAsyncResult res)
{
ServerStateObject state = (ServerStateObject)res.AsyncState;
TClient client = state.client;
try
{
// read data from the client socket
int read = client.Socket.EndReceive(res);
// data was read from client socket
if (read > 0)
{
using (MemoryStream stream = new MemoryStream(state.buffer, 0, read, false, true))
ReceiveMessage(client, stream);
// begin receiving again after handling, so we can re-usse the same stateobject/buffer without issues.
client.Socket.BeginReceive(state.buffer, 0, ServerStateObject.BufferSize, 0, HandleAsyncReceive, state);
}
else
{
// connection was closed.
Log.Info("Client closed connection: {0}", client.Socket.RemoteEndPoint);
client.Close();
}
}
catch (SocketException e)
{
switch (e.SocketErrorCode)
{
// TODO: More SocketError handling.
case SocketError.ConnectionReset:
Log.ErrorException(string.Format("Client {0} issued a ConnectionReset error.", client), e);
client.Close();
break;
default:
// Swallow the exception, but make sure a log is created and close the client.
//Log.ErrorException(string.Format("Unhandled SocketException (Error:{0}) for client {1} while receiving. Closing the client.", e.SocketErrorCode, client.ToString()), e);
client.Close();
break;
}
}
catch (Exception e)
{
// Note: State for this client may have been corrupted at this point, this is
// an important issue when we reach this handler. This will force process to close.
// Todo: Close anything else if needed (i.e. session, this will catch every unhandled exception in the handler, ect).
Log.ErrorException("Exception occured while handling a packet", e);
// We're most likely crashing, client is going to close anyway,
// maybe it's better not to do more with it.
//client.Close();
throw;
}
}
private void HandleAsyncConnection(IAsyncResult res)
{
m_listener.BeginAcceptTcpClient(HandleAsyncConnection, m_listener);
TcpClient client = m_listener.EndAcceptTcpClient(res);
if (!IsClientAccepted(client.Client))
{
Log.Warn("Refused connection from {0}", client.Client.RemoteEndPoint);
return;
}
Log.Info("Openned connection from {0}", client.Client.RemoteEndPoint);
ServerStateObject state = new ServerStateObject();
state.client = CreateClient(client.Client);
ClientConnected(state.client);
client.Client.BeginReceive(state.buffer, 0, ServerStateObject.BufferSize, SocketFlags.None, HandleAsyncReceive, state);
}
//private void StateChangedCallback(ServerStateObject param)
//{
//}
protected void StartListening(ServerStateObject context)
{
//context.StateChangedHandler = new Action<ServerStateObject>(StateChangedCallback);
// Data buffer for incoming data.
byte[] bytes = new Byte[1024];
// Establish the local endpoint for the socket.
// The DNS name of the computer
// running the listener is "host.contoso.com".
IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
IPAddress ipAddress = ipHostInfo.AddressList.FirstOrDefault(ip => { return ip.AddressFamily == AddressFamily.InterNetwork; });
if (ipAddress == null)
{
this.OnError(ErrorType.Error, new NotSupportedException("IPv4 주소만 지원합니다. 컴퓨터에 IPv4 주소로 인터넷이 연결되어 있는지 확인하세요"));
return;
}
this.HostAddress = ipAddress;
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, context.Port);
// Create a TCP/IP socket.
Socket listener = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
// Bind the socket to the local endpoint and listen for incoming connections.
try
{
listener.Bind(localEndPoint);
listener.Listen(100);
this.OnStartListening(listener);
while (context.IsListening)
{
// Set the event to nonsignaled state.
allDone.Reset();
// Start an asynchronous socket to listen for connections.
Console.WriteLine("Waiting for a connection...");
listener.BeginAccept(
new AsyncCallback(AcceptCallback),
listener);
// Wait until a connection is made before continuing.
allDone.WaitOne(TimeSpan.FromMilliseconds(1000));
}
this.OnStopListening(listener);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
this.OnError(ErrorType.Error, e);
}
Console.WriteLine("\nPress ENTER to continue...");
Console.Read();
}
