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07.07.2008 at 07:07AM PDT, ID: 23543388
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7.8

VB.Net Telnet timing out.

Asked by sgaggerj in Microsoft Visual Basic.Net, SSH / Telnet Software

Tags:

Hi all,

I have written a program that reboots a game server ever X hours.
It broadcasts a message to the sever (via shell telnet and sendkeys.sendwait) 30 min before reboot, 15 min before, 5 min before and 1 min before, so that players have time to logout.

It uses a System.Timers.Timer to do this.

It runs perfectly when the computer is not locked, but it timesout on the 1st broadcast when the computer is locked and the telnet window does not close. This breaks all further broadcasts as the BroadcstTimer is stopped and never restarted.

The only thing I can think of as to why this is happening is that when the computer is locked, the shelled telnet is not getting activated by AppActivate.

Any thoughts on how to fix this so that it does run properly when the computer is locked? (other than disabling the server's locking timeout?)

Below is the timer elapsed code and the broadcast code.Start Free Trial
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Private Sub BroadcastTimer_Elapsed(ByVal sender As Object, ByVal e As System.Timers.ElapsedEventArgs) Handles BroadcastTimer.Elapsed
        BroadcastTimer.Stop()
 
        Dim ts As TimeSpan = EndTime - Now
        If ts.TotalMinutes > 29 And ts.TotalMinutes < 31 Then
            If Not Broadcast30 Then
                Log.WriteLine("Broadcasting 30 minute warning: ") ' & My.Settings.Message & " 30 minutes.")
                BroadcastNow(My.Settings.Message & " 30 minutes.")
                Broadcast30 = True
            End If
        ElseIf ts.TotalMinutes > 14 And ts.TotalMinutes < 16 Then
            If Not Broadcast15 Then
                Log.WriteLine("Broadcasting 15 minute warning: ") ' & My.Settings.Message & " 15 minutes.")
                BroadcastNow(My.Settings.Message & " 15 minutes.")
                Broadcast15 = True
            End If
        ElseIf ts.TotalMinutes > 4 And ts.TotalMinutes < 6 Then
            If Not Broadcast5 Then
                Log.WriteLine("Broadcasting 5 minute warning: ") ' & My.Settings.Message & " 5 minutes.")
                BroadcastNow(My.Settings.Message & " 5 minutes.")
                Broadcast5 = True
            End If
        ElseIf ts.TotalMinutes > 0 And ts.TotalMinutes < 2 Then
            If Not Broadcast1 Then
                Log.WriteLine("Broadcasting 1 minute warning: ") ' & My.Settings.Message & " 1 minutes.")
                BroadcastNow(My.Settings.Message & " 1 minutes.")
                Broadcast1 = True
            End If
        End If
        BroadcastTimer.Start()
    End Sub
Private Sub CloseTelnet()
        Dim p() As Process = Process.GetProcessesByName("telnet")
        For Each pr As Process In p
            pr.Kill()
            pr.WaitForExit()
        Next
    End Sub
Private Sub BroadcastNow(ByVal msg As String)
        CloseTelnet()
        BroadcastButton.Enabled = False
        BroadcastMsg.Enabled = False
        Dim line As String = ""
        Try
            Log.WriteLine("Broadcasting: " & msg)
            Dim lReturn As Object
            line = "TELNET"
            lReturn = IIf(My.Settings.ShowTelnet, Shell("Telnet " & My.Settings.BroadcastServerIP & " " & My.Settings.BroadcastServerPort, AppWinStyle.NormalFocus, False), Shell("Telnet " & My.Settings.BroadcastServerIP & " " & My.Settings.BroadcastServerPort, AppWinStyle.Hide, False))
            Sleep(5)
            AppActivate(lReturn)
            Sleep(2)
            'login
            line = "LOGIN"
            System.Windows.Forms.SendKeys.SendWait(My.Settings.BroadcastUsername & "{ENTER}")
            Sleep(2)
            ' pass
            line = "PASS"
            System.Windows.Forms.SendKeys.SendWait(My.Settings.BroadcastPassword & "{ENTER}")
            Sleep(2)
            ' broadcast message
            line = "BROADCAST"
            System.Windows.Forms.SendKeys.SendWait("broadcast " & msg & "{ENTER}")
            Sleep(1)
            'LOGOFF
            line = "LOGOFF"
            System.Windows.Forms.SendKeys.SendWait("exit{ENTER}")
            Sleep(2)
            'CLOSE TELNET
            line = "CLOSING 1"
            System.Windows.Forms.SendKeys.SendWait("{ENTER}")
            line = "CLOSING 2"
            System.Windows.Forms.SendKeys.SendWait("%{F4}")
            BroadcastButton.Enabled = True
            BroadcastMsg.Enabled = True
        Catch ex As Exception
            'MsgBox("Error broadcasting: " & line & vbLf & ex.ToString)
            Log.WriteLine("Error broadcasting:" & vbLf & ex.ToString)
            BroadcastButton.Enabled = True
            BroadcastMsg.Enabled = True
        End Try
    End Sub
 
 
[+][-]07.07.2008 at 02:08PM PDT, ID: 21948692

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About this solution

Zones: Microsoft Visual Basic.Net, SSH / Telnet Software
Tags: VB.Net 2005
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Solution Provided By: tasky
Participating Experts: 1
Solution Grade: A
 
 
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