[IPP] Access to "Console Display Buffer" via IPP?

[Michael Sweet]

Holger,

> On Nov 21, 2024, at 4:02 AM, Holger Gräfe via ipp <ipp at pwg.org> wrote:
> 
> Hi,
> 
> our company has a tool in place that allows the support team to view the content of the display from most of our 3,000 printers worldwide. This works via SNMP queries for Printer MIB objects 1.3.6.1.2.1.43.16.5.1.2 (prtConsoleDisplayBufferText).
>   Because of many disadvantages of SNMP, I have been looking for something similar in IPP, but could not find anything. Is there a particular attribute in the Get-Printer-Attributes request for this purpose? Or is it even possible somehow to query any Printer MIB value via OID?

There isn't a generic mechanism for this, but we have done MIB mappings to IPP for much of the Printer MIB.

>   If this is currently not possible: What about adding such a feature, or do you see any obstacles? 

There isn't a technical reason to prevent this.  FWIW, we last reviewed the Printer MIB for properties to map to IPP at the February 2021 face-to-face meeting:

    https://ftp.pwg.org/pub/pwg/ipp/slides/ipp-wg-agenda-february-21.pdf#page=31
    https://ftp.pwg.org/pub/pwg/ipp/minutes/ippv2-f2f-minutes-20210209.pdf

The consensus then was to not map the prtConsole properties because we didn't think anyone was using them...

WRT the prtConsole table:

    https://www.rfc-editor.org/rfc/rfc3805#page-125

the logical mapping to IPP would probably look like this:

    printer-console-display (1setOf text(MAX))
      (mapped and orders from prtConsoleDisplayBufferIndex, prtConsoleDisplayBufferText, and prtConsoleLocalization
    printer-console-light (1setOf octetString(MAX))
      Values: "index=N;onTime=N;offTime=N;color=COLOR;"
    printer-console-light-description (1setOf text(MAX))


________________________
Michael Sweet