Create application to dial and keep connection alive

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Hi all,

I have setup a VPN server for a client of mine, there are three incoming connections to the server. I am using RAS dial and every once in a while one of these connections drop. Normally there is no one near these computers and they are supposed to stream some data once in a while to the main server.

I would like to create an application which will dial these connections on boot and that will once in a while send a packet through the connection to make sure it is still active and if not, redial the connection.

I would also like to have a basic "ping" feature so if someone wants to make sure the connection is working, they can click on a button and see replies or if possible a little "OK" status.

I did a course on C# many years ago, have not touched it since and just would like to be pointed in the right direction. I would prefer to write the application myself rather than use other software.

Posted 17-May-11 2:56am

Byron Clark

Updated 17-May-11 2:58am

Ramalinga Koushik

v2

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ankitjoshi24 · Answer 1 · 2011-05-17T10:13:00

Solution 1

Please refer to the following link: -

http://www.asterworld.com/en/soft/009.html[^]

Let me know if the link was helpful

--
AJ

Posted 17-May-11 10:13am

ankitjoshi24

charles henington · Answer 2 · 2011-05-17T11:26:00

not sure if wininet.dll would be of assistance in this case but you could check
to see if the connection is alive by using

C#

[DllImport("wininet.dll", SetLastError = true)]
        private static extern bool InternetCheckConnection(string lpszUrl, int dwFlags, int dwReserved);
private bool Connected;
if (InternetCheckConnection("http://www.google.com",1,0))
            {
                Connected = true;
            }
if (!Connected)
{
  // try reconnection here

}

Byron Clark · Answer 3 · 2011-05-19T02:07:00

Solution 3

Thank you for the ideas, neither of them really do what I want, I will continue to do research and post the solution here once I find it for anyone else who requires it...

Posted 19-May-11 2:07am