Xojo Plugin

Send an SSH IGNORE Message

Demonstrates the Chilkat Ssh.SendIgnore method, which sends an SSH IGNORE message. It takes no arguments. The server does not reply, but a successful send helps confirm the connection is still writable. No channel is required.

Background: The SSH IGNORE message is discarded by the peer by design; its usefulness is as a lightweight keep-alive or liveness probe. Because it exercises the actual write path, a successful SendIgnore is stronger evidence than CheckConnection that the link is still usable, without side effects on any channel.

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Xojo Plugin

Dim success As Boolean
success = False

//  Demonstrates the Ssh.SendIgnore method, which sends an SSH IGNORE message.  It takes no
//  arguments.  The server does not reply, but a successful send helps confirm the connection is
//  still writable.  No channel is required.

Dim ssh As New Chilkat.Ssh

//  Connect to the SSH server.  Port 22 is the usual SSH port.
Dim sshPort As Int32
sshPort = 22
success = ssh.Connect("ssh.example.com",sshPort)
If (success = False) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

//  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.
Dim password As String
password = "mySshPassword"

success = ssh.AuthenticatePw("mySshLogin",password)
If (success = False) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

//  Send an IGNORE message to verify the connection is still writable.
success = ssh.SendIgnore()
If (success = False) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

System.DebugLog("IGNORE message sent.")

ssh.Disconnect