I did something like this in the past,
I needed it since I wanted to connect to several servers
at once, but didnt want to wait to long...
This class only checks if a server is listening on a certain port.
class Pinger
{
bool m_bAvailable = false;
IPEndPoint m_EndPoint;
public Pinger( IPEndPoint endPoint, int timeout)
{
m_EndPoint = endPoint;
AsyncCallback ConnectedMethodCallback = new AsyncCallback(
ConnectedMethod);
Socket socket = new Socket( AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
IAsyncResult ar = socket.BeginConnect( m_EndPoint,
ConnectedMethodCallback, socket);
ar.AsyncWaitHandle.WaitOne( timeout, false);
}
public bool Available
{
get { return m_bAvailable; }
}
public IPEndPoint EndPoint
{
get { return m_EndPoint; }
}
void ConnectedMethod( IAsyncResult ar)
{
Socket socket = (Socket)ar.AsyncState;
try
{
socket.EndConnect( ar);
m_bAvailable = true;
}
catch( Exception)
{
}
socket.Close();
}
}
HTH
// Ryan
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