Xbase++

SSH Tunnel Thread Activity Log

Demonstrates the tunnel-log properties KeepTunnelLog, TunnelLog, and TunnelLogPath, which record the activity of the SSH tunnel and client-manager threads.

Note: The log paths are relative to the application's current working directory. Absolute paths may also be used.

Background: This is the counterpart to the accept log, covering the SSH side rather than the listener: the tunnel and client-manager threads that actually move data. As with the accept log, KeepTunnelLog enables the in-memory TunnelLog while TunnelLogPath writes a separate file. Together the two logs let you localize a problem to either the accepting side or the forwarding side.

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LOCAL nSuccess
LOCAL oTunnel
LOCAL nSshPort
LOCAL cPassword
LOCAL nListenPort
LOCAL nWaitForThreadExit

nSuccess := 0

//  Demonstrates the SshTunnel tunnel-log properties KeepTunnelLog, TunnelLog, and TunnelLogPath.
//  
//  These log the activity of the SSH tunnel and client-manager threads.

oTunnel := CreateObject("Chilkat.SshTunnel")

//  Retain the SSH tunnel-thread activity in memory so it can be read from the TunnelLog property.
oTunnel:KeepTunnelLog := 1

//  Optionally also write the tunnel-thread activity to a file (separate from the in-memory log).
oTunnel:TunnelLogPath := "qa_output/tunnel.log"

oTunnel:DestHostname := "db.internal.example.com"
oTunnel:DestPort := 5432

nSshPort := 22
nSuccess := oTunnel:Connect("ssh.example.com", nSshPort)
IF (nSuccess == 0)
    ? oTunnel:LastErrorText
    oTunnel:destroy()
    RETURN
ENDIF

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
cPassword := "mySshPassword"

nSuccess := oTunnel:AuthenticatePw("mySshLogin", cPassword)
IF (nSuccess == 0)
    ? oTunnel:LastErrorText
    oTunnel:destroy()
    RETURN
ENDIF

nListenPort := 1080
nSuccess := oTunnel:BeginAccepting(nListenPort)
IF (nSuccess == 0)
    ? oTunnel:LastErrorText
    oTunnel:destroy()
    RETURN
ENDIF

//  ... clients transfer data through the tunnel ...

//  Read the accumulated in-memory tunnel log.
? oTunnel:TunnelLog

nWaitForThreadExit := 1
nSuccess := oTunnel:CloseTunnel(nWaitForThreadExit)
IF (nSuccess == 0)
    ? oTunnel:LastErrorText
    oTunnel:destroy()
    RETURN
ENDIF

oTunnel:destroy()