[IPP] ipp-usb: exposing device serial number and vendor/device ID via TXT record

[Michael Sweet]

Ira,

I am on the printing-architecture list as well, and I responded that this is fine (we already do something similar to expose IEEE-1284 key/value pairs with the "usb_" prefix), and the advertisement is only available on the host since you can't directly share a local IPP-USB printer (which only understands "localhost").


> On Nov 13, 2024, at 8:55 AM, Ira McDonald <blueroofmusic at gmail.com> wrote:
> 
> Hi Mike,
> 
> [Forwarded from OP mailing list]
> 
> This looks questionable, from the point of interoperability.  Comments to Alexander?
> 
> Cheers,
> - Ira
> 
> Ira McDonald (Musician / Software Architect)
> Chair - SAE Trust Anchors and Authentication TF
> 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 at gmail.com
> (permanent) PO Box 221  Grand Marais, MI 49839  906-494-2434
> 
> 
> ---------- Forwarded message ---------
> From: Alexander Pevzner <pzz at apevzner.com>
> Date: Wed, Nov 13, 2024 at 6:36 AM
> Subject: ipp-usb: exposing device serial number and vendor/device ID via TXT record
> To: Open Printing <printing-architecture at lists.linux-foundation.org>
> 
> 
> Hi!
> 
> I want to be able to match devices, exported by the ipp-usb, with the 
> underlying USB devices, because every second user asks "where is my 
> newly connected USB printer?" and needs to be pointed to the list of the 
> network printers.
> 
> For this purpose I want to add a couple of parameters to the TXT record, 
> published by the ipp-usb:
> 
>      usb_SER=VCF9192281  ; Device serial number
>      usb_HWID=0482&069d  ; Its vendor and device ID
> 
> However, if there are already standard names defined for this purpose, 
> I'd prefer to follow the standard. Please, point me to the right 
> direction at this case.
> 
> WDYT?
> 
> -- 
> 
>         Wishes, Alexander Pevzner (pzz at apevzner.com)
> 
> 

________________________
Michael Sweet