public static void AcceptCallback(IAsyncResult ar)
{
// Signal the main thread to continue.
AllDone.Set();
// Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
// Create the state object.
StateObject state = new StateObject();
state.workSocket = handler;
Client client = new Client(ClientController.GetClientListCount());
client.ConnectionTime = DateTime.Now;
client.IP = Convert.ToString(IPAddress.Parse(((IPEndPoint)state.workSocket.RemoteEndPoint).Address.ToString()));
client.Port = ((IPEndPoint)state.workSocket.RemoteEndPoint).Port;
ClientController.AddClient(client);
IPEndPoint clientEndPoint = (IPEndPoint)state.workSocket.RemoteEndPoint;
Sistem.printF(string.Format("Client Connected: {0}", clientEndPoint.Address.ToString()), ConsoleColor.Green);
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
}
private static void SendCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
Socket handler = (Socket)ar.AsyncState;
// Complete sending the data to the remote device.
int bytesSent = handler.EndSend(ar);
Sistem.printF(string.Format("Sent {0} bytes to client.", bytesSent), ConsoleColor.Gray);
handler.Shutdown(SocketShutdown.Both);
handler.Close();
}
catch (Exception e)
{
Sistem.printF(e.ToString(), ConsoleColor.Red);
}
}
public static void ReadCallback(IAsyncResult ar)
{
string content = string.Empty;
// Retrieve the state object and the handler socket from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;
// Read data from the client socket.
int bytesRead = handler.EndReceive(ar);
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
state.sb.Append(Encoding.UTF8.GetString(state.buffer, 0, bytesRead));
withrawBytes(ref buffer, state.buffer, bytesRead);
// Check for end-of-file tag. If it is not there, read more data.
content = state.sb.ToString();
if (content.Contains("<File.") || content.Contains("<SQL"))
{
// All the data has been read from the client. Display it on the console.
bool result = InterpretData(buffer);
if (result)
{
Sistem.printF(string.Format("Read {0} bytes from socket. \n", content.Length), ConsoleColor.Green);
// Echo the data encrypted back to the client.
Send(handler, buffer);
}
else
{
Send(handler, new byte[0]);
}
}
else // Not all data received. Get more.
{
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
}
}
}
public static void StartListening()
{
// 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[0];
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, Port);
// Create a TCP/IP socket.
Socket listener = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
// Bind the socket to the local endpoint and listen for incoming connections.
try
{
listener.Bind(localEndPoint);
listener.Listen(100);
Sistem.printF(Sistem.GetLogTag(Sistem.EnumLogTags.SERVER) + "Async Socket Server ONLINE at " + ipAddress.ToString() + ":" + Port, ConsoleColor.Green);
while (true)
{
// Set the event to nonsignaled state.
AllDone.Reset();
// Start an asynchronous socket to listen for connections.
Sistem.printF(Sistem.GetLogTag(Sistem.EnumLogTags.SERVER) + "Waiting for a connection...", ConsoleColor.Gray);
listener.BeginAccept(new AsyncCallback(AcceptCallback), listener);
// Wait until a connection is made before continuing.
AllDone.WaitOne();
}
}
catch (Exception e)
{
Sistem.printF(e.ToString(), ConsoleColor.Red);
}
Sistem.printF("\nPress ENTER to continue...", ConsoleColor.Gray, false, false, true, true, true);
}
