private void AcceptCallback(IAsyncResult result)
{
TcpConnectionInfo connection = new TcpConnectionInfo();
try
{
Socket s = (Socket)result.AsyncState;
connection.Socket = s.EndAccept(result);
connection.Buffer = new byte[255];
connection.RemoteAddress = connection.Socket.RemoteEndPoint.ToString();
connection.RemoteEndPoint = (IPEndPoint)connection.Socket.RemoteEndPoint;
_connections[((IPEndPoint)connection.Socket.RemoteEndPoint).Address.ToString()] = connection;
if (clientConnected != null)
{
clientConnected(connection);
}
connection.Socket.BeginReceive(connection.Buffer, 0, connection.Buffer.Length, SocketFlags.None,
new AsyncCallback(ReceiveCallback), connection);
_serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), result.AsyncState);
}
catch (SocketException e)
{
CloseConnection(connection, e);
}
catch (ObjectDisposedException) { }
catch (Exception ex)
{
CloseConnection(connection, ex);
}
}
private void CloseConnection(TcpConnectionInfo ci, Exception ex)
{
if (ci != null && ci.Socket != null)
{
try
{
TcpConnectionInfo removed = null;
_connections.TryRemove(ci.RemoteEndPoint.Address.ToString(), out removed);
ci.Socket.Close();
}
catch { }
if (clientDisconnected != null)
{
clientDisconnected(ci, ex);
}
}
}
public void Send(IPEndPoint endPoint, byte[] data)
{
if (endPoint != null)
{
if (_connections.ContainsKey(endPoint.Address.ToString()))
{
TcpConnectionInfo connection = _connections[endPoint.Address.ToString()];
try
{
connection.Socket.Send(data);
}
catch (SocketException e)
{
CloseConnection(connection, e);
}
catch (ObjectDisposedException) { }
catch (Exception)
{
}
}
}
else
{
foreach (var connection in _connections)
{
try
{
connection.Value.Socket.Send(data);
}
catch (SocketException e)
{
CloseConnection(connection.Value, e);
}
catch (ObjectDisposedException) { }
catch (Exception)
{
}
}
}
}
private void ReceiveCallback(IAsyncResult result)
{
TcpConnectionInfo connection = (TcpConnectionInfo)result.AsyncState;
try
{
int bytesRead = connection.Socket.EndReceive(result);
if (0 != bytesRead)
{
if (dataReceived != null)
{
byte[] data = new byte[bytesRead];
Buffer.BlockCopy(connection.Buffer, 0, data, 0, bytesRead);
dataReceived(connection, data);
}
connection.Socket.BeginReceive(connection.Buffer, 0,
connection.Buffer.Length, SocketFlags.None,
new AsyncCallback(ReceiveCallback), connection);
}
else
{
CloseConnection(connection, null);
}
}
catch (SocketException e)
{
CloseConnection(connection, e);
}
catch (ObjectDisposedException) { }
catch (Exception ex)
{
CloseConnection(connection, ex);
}
}
private void CloseConnection(TcpConnectionInfo ci, Exception ex)
{
if (ci != null && ci.Socket != null)
{
try
{
TcpConnectionInfo removed = null;
_connections.TryRemove(ci.RemoteEndPoint.Address.ToString(), out removed);
ci.Socket.Close();
}
catch { }
if (clientDisconnected != null)
{
clientDisconnected(ci, ex);
}
}
}
private void AcceptCallback(IAsyncResult result)
{
TcpConnectionInfo connection = new TcpConnectionInfo();
try
{
Socket s = (Socket)result.AsyncState;
connection.Socket = s.EndAccept(result);
connection.Buffer = new byte[255];
connection.RemoteAddress = connection.Socket.RemoteEndPoint.ToString();
connection.RemoteEndPoint = (IPEndPoint)connection.Socket.RemoteEndPoint;
_connections[((IPEndPoint)connection.Socket.RemoteEndPoint).Address.ToString()] = connection;
if (clientConnected != null)
{
clientConnected(connection);
}
connection.Socket.BeginReceive(connection.Buffer, 0, connection.Buffer.Length, SocketFlags.None,
new AsyncCallback(ReceiveCallback), connection);
_serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), result.AsyncState);
}
catch (SocketException e)
{
CloseConnection(connection, e);
}
catch (ObjectDisposedException) { }
catch (Exception ex)
{
CloseConnection(connection, ex);
}
}
