(MFC) SSH Tunnel for Database Connection (such as ADO, ODBC, JDBC, etc.)

Demonstrates how to create an SSH tunneling client in a background thread of your application. This makes it possible to SSH tunnel database connections without the need for separate software (such as PuTTY) to be running.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkGlobal.h>
#include <CkSshTunnel.h>

void ChilkatSample(void)
    {
    CkString strOut;

    CkGlobal chilkatGlob;
    bool success = chilkatGlob.UnlockBundle("Anything for 30-day trial.");
    if (success != true) {
        strOut.append(chilkatGlob.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkSshTunnel tunnel;

    const char *sshHostname = "www.my-ssh-server.com";
    int sshPort = 22;

    //  Connect to an SSH server and establish the SSH tunnel:
    success = tunnel.Connect(sshHostname,sshPort);
    if (success != true) {
        strOut.append(tunnel.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Authenticate with the SSH server via a login/password
    //  or with a public key.
    //  This example demonstrates SSH password authentication.
    success = tunnel.AuthenticatePw("mySshLogin","mySshPassword");
    if (success != true) {
        strOut.append(tunnel.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  The destination host/port is the database server.
    //  The DestHostname may be the domain name or
    //  IP address (in dotted decimal notation) of the database
    //  server.
    tunnel.put_DestPort(1433);
    tunnel.put_DestHostname("myDbServer.com");

    //  Start accepting connections in a background thread.
    //  The SSH tunnels are autonomously run in a background
    //  thread.  There is one background thread for accepting
    //  connections, and another for managing the tunnel pool.
    int listenPort = 3316;
    success = tunnel.BeginAccepting(listenPort);
    if (success != true) {
        strOut.append(tunnel.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  At this point the app may connect to the database server through
    //  the SSH tunnel.  The database connection string would
    //  use "localhost" for the hostname and 3316 for the port.
    //  We're not going to show the database coding here,
    //  because it can vary depending on the API you're using
    //  (ADO, ODBC, OLE DB, etc. )

    //  This is where the application's database code would go...

    //  Stop the background listen/accept thread:
    bool waitForThreadExit = true;
    success = tunnel.StopAccepting(waitForThreadExit);
    if (success != true) {
        strOut.append(tunnel.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Close the SSH tunnel (would also kick any remaining connected clients).
    success = tunnel.CloseTunnel(waitForThreadExit);
    if (success != true) {
        strOut.append(tunnel.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }