Re: [IPP] RFC: Printer Firmware Updates via IPP System Service

Hi Mike,

+1

I like your proposed text and think it's at an appropriate level of detail.

Cheers,
- Ira

Ira McDonald (Musician / Software Architect)
Co-Chair - TCG Trusted Mobility Solutions WG
Co-Chair - TCG Metadata Access Protocol SG
Chair - Linux Foundation Open Printing WG
Secretary - IEEE-ISTO Printer Working Group
Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG
IETF Designated Expert - IPP & Printer MIB
Blue Roof Music / High North Inc
http://sites.google.com/site/blueroofmusic
http://sites.google.com/site/highnorthinc
mailto: blueroofmusic@gmail.com
PO Box 221  Grand Marais, MI 49839  906-494-2434

On Tue, Oct 15, 2019 at 3:27 PM Michael Sweet via ipp <ipp@pwg.org> wrote:

> All,
>
> During our last call review of the IPP System Service v1.0, several
> questions came up concerning how firmware updates will be applied once the
> resource is created, uploaded (sent), and installed.  The consensus was to
> add a subsection 17.x (Appendix A - Rationale for Design Choices)
> documenting how we see this working without defining/requiring a particular
> file format.  The following is my proposed text for this subsection:
>
> 17.4 Executable Resources
>
> This specification defines two types of executable resources: firmware
> ('executable-firmware') and application software ('executable-software').
> While no specific file format has been mandated, an executable resource
> file:
>
> - Provides a manifest providing descriptive text, version number(s),
> subunit or other associations, and a cryptographic hash of the executable
> content,
> - Provides a cryptographic signature of the metadata, and
> - Contains the executable content.
>
> When subunit firmware is installed (or queued for installation on the next
> restart of the System), it applies to all compatible subunits.  For
> example, if a System contains multiple fold finishers and an Administrator
> installs new fold finisher firmware, all of the fold finishers are updated
> - there is no way to selectively upgrade a single subunit.
>
> When application software is installed, it typically applies to the System
> and all of its Printers.  However, this specification does not prohibit
> applications that need to be subsequently allocated to a Printer, for
> example a cloud-based PDF interpreter application could be installed and
> later allocated to a specific Printer.
>
>
> Please provide your feedback before the next IPP workgroup conference call
> on October 24, 2019 so that we can start a PWG Formal Vote to span the
> November face-to-face meeting.
>
> ________________________
> Michael Sweet
>
>
>
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