Internal/Get-NtpTime.ps1
Function Get-NtpTime ( [String]$NTPServer ) { # Build NTP request packet. We'll reuse this variable for the response packet $NTPData = New-Object byte[] 48 # Array of 48 bytes set to zero $NTPData[0] = 27 # Request header: 00 = No Leap Warning; 011 = Version 3; 011 = Client Mode; 00011011 = 27 # Open a connection to the NTP service $Socket = New-Object Net.Sockets.Socket ( 'InterNetwork', 'Dgram', 'Udp' ) $Socket.SendTimeOut = 2000 # ms $Socket.ReceiveTimeOut = 2000 # ms $Socket.Connect( $NTPServer, 123 ) # Make the request $Null = $Socket.Send( $NTPData ) $Null = $Socket.Receive( $NTPData ) # Clean up the connection $Socket.Shutdown( 'Both' ) $Socket.Close() # Extract relevant portion of first date in result (Number of seconds since "Start of Epoch") $Seconds = [BitConverter]::ToUInt32( $NTPData[43..40], 0 ) # Add them to the "Start of Epoch", convert to local time zone, and return ( [datetime]'1/1/1900' ).AddSeconds( $Seconds ).ToLocalTime() } # SIG # Begin signature block # MIIZwgYJKoZIhvcNAQcCoIIZszCCGa8CAQExCzAJBgUrDgMCGgUAMGkGCisGAQQB # gjcCAQSgWzBZMDQGCisGAQQBgjcCAR4wJgIDAQAABBAfzDtgWUsITrck0sYpfvNR # 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