public static void Connect(Socket socket, EndPoint endPoint, int timeoutMs)
{
var connectCall = new TcpConnectCall(socket);
try
{
//Need for controlling timeout period introduces us to assynccallback methods
var connectedCallback = new AsyncCallback(connectCall.ConnectedCallback);
var result = socket.BeginConnect(endPoint, connectedCallback, connectCall);
// wait for timeout for connect
if (result.AsyncWaitHandle.WaitOne(timeoutMs, false) == false)
{
connectCall.CancelConnect();
// throw exception
throw new Exception("TIME_OUT");
}
else
{
if (connectCall._mConnectCallbackCompleted.WaitOne(15000, false) == false)
{
}
Exception connectException = connectCall._mConnectFailureException;
if (connectException != null)
{
//throw new Exception("Exception occurred during connect attempt: " + connectException.Message, connectException);
throw new Exception("PORT_CLOSED");
}
}
}
finally
{
connectCall.Dispose();
}
}
public static void Connect(Socket socket, EndPoint endPoint, int timeoutMs)
{
var connectCall = new TcpConnectCall(socket);
try
{
//Need for controlling timeout period introduces us to assynccallback methods
var connectedCallback = new AsyncCallback(connectCall.ConnectedCallback);
var result = socket.BeginConnect(endPoint, connectedCallback, connectCall);
// wait for timeout for connect
if (result.AsyncWaitHandle.WaitOne(timeoutMs, false) == false)
{
connectCall.CancelConnect();
// throw exception
throw new Exception("TIME_OUT");
}
else
{
if (connectCall._mConnectCallbackCompleted.WaitOne(15000, false) == false)
{
}
Exception connectException = connectCall._mConnectFailureException;
if (connectException != null)
{
//throw new Exception("Exception occurred during connect attempt: " + connectException.Message, connectException);
throw new Exception("PORT_CLOSED");
}
}
}
finally
{
connectCall.Dispose();
}
}
private string TCPScan(int port, IPEndPoint ipEnd)
{
try
{
TcpConnectCall.Connect(new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp), ipEnd, Convert.ToInt32(textBox6.Text));
return(string.Format("{0} is opened\n", port));
}
catch (Exception ex)
{
switch (ex.Message)
{
case "TIME_OUT":
return(string.Format("{0} is filtered\n", port));
break;
case "PORT_CLOSED":
return(string.Format("{0} is closed\n", port));
break;
}
}
return(null);
}
