(Lianja) 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.

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loChilkatGlob = createobject("CkGlobal")
llSuccess = loChilkatGlob.UnlockBundle("Anything for 30-day trial.")
if (llSuccess <> .T.) then
    ? loChilkatGlob.LastErrorText
    release loChilkatGlob
    return
endif

loTunnel = createobject("CkSshTunnel")

lcSshHostname = "www.my-ssh-server.com"
lnSshPort = 22

//  Connect to an SSH server and establish the SSH tunnel:
llSuccess = loTunnel.Connect(lcSshHostname,lnSshPort)
if (llSuccess <> .T.) then
    ? loTunnel.LastErrorText
    release loChilkatGlob
    release loTunnel
    return
endif

//  Authenticate with the SSH server via a login/password
//  or with a public key.
//  This example demonstrates SSH password authentication.
llSuccess = loTunnel.AuthenticatePw("mySshLogin","mySshPassword")
if (llSuccess <> .T.) then
    ? loTunnel.LastErrorText
    release loChilkatGlob
    release loTunnel
    return
endif

//  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.
loTunnel.DestPort = 1433
loTunnel.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.
lnListenPort = 3316
llSuccess = loTunnel.BeginAccepting(lnListenPort)
if (llSuccess <> .T.) then
    ? loTunnel.LastErrorText
    release loChilkatGlob
    release loTunnel
    return
endif

//  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:
llWaitForThreadExit = .T.
llSuccess = loTunnel.StopAccepting(llWaitForThreadExit)
if (llSuccess <> .T.) then
    ? loTunnel.LastErrorText
    release loChilkatGlob
    release loTunnel
    return
endif

//  Close the SSH tunnel (would also kick any remaining connected clients).
llSuccess = loTunnel.CloseTunnel(llWaitForThreadExit)
if (llSuccess <> .T.) then
    ? loTunnel.LastErrorText
    release loChilkatGlob
    release loTunnel
    return
endif



release loChilkatGlob
release loTunnel