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npp-minutes-91mar.txt
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CURRENT_MEETING_REPORT_
Reported by Glenn Trewitt/DEC
NPP Minutes
The following items were on the Agenda:
o LPR/LPD Protocol RFC
o Printer Access Protocol -- modifications
o Son of LPR/LPD; Palladium
o Charter and Schedule
One item was added:
o Network Printing Protocol from UMD
This meeting was hampered by a lack of continuity. By my count, only
four out of the twenty people at the meeting had been to any previous
meetings. Advance notice of the next meeting may help to with this.
Printer Access Protocol
There were several discussions before the meeting with members of the
Security and Authentication Group (SAAG) about how to add security to
PAP. John Linn, who sat in on the meeting, was most helpful.
Surprisingly, we were able to come up with a small set of extensions
that do security to everyone's satisfactions. A note will be sent out
describing these.
There was no discussion about the other issues mentioned in the Agenda,
because Ajay Kachrani and Glenn Trewitt were the only individuals who
had specific knowledge of them. Glenn has not seen any comments about
the proposed changes that he sent out, or about the use of (minimal) PDL
commands for paper tray, font, etc., selection mentioned in the Agenda.
LPD Protocol RFC
There was a very useful discussion about the nit-picky things that the
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RFC isn't clear on, such as acknowledgements. A revised RFC will be
sent out with these elaborations within two weeks. An attempt will be
made to deal with the following issues that have been raised at previous
meetings:
o ``Pure protocol'' vs. 4.2 implementation
o Noting extensions that have been made
It is possible that some of the useful (compatible) additions may make
it into 4.4 bsd. This would be a big win.
Network Printing Protocol from UMD
Bruce Crabill from the University of Maryland presented a protocol used
there for printing. It resembles SMTP, in the form of its client/server
dialog. The functionality is a bit higher than LPR/LPD. The significant
improvement over LPR/LPD is the fact that responses can be more
detailed, and that information can be passed back to the client. (In
LPR/LPD, the only way that information gets back to the client is at the
end of communication, in which case a text string (usually an error
message) is sent back.)
Son of LPR/LPD; Palladium
Still lots of ideas about what belongs in the client ->spooler ,
spooler ->spooler , and spooler ->printer protocols. There seemed to
be a lot of agreement that the three had only minor differences between
them. This would lead to the consideration that perhaps there should
only be one protocol. Is PAP a candidate? What about the UMD work?
Glenn would like to see some discussion about this on the list *before*
the next meeting.
Network Printing Working Group Charter
There was no discussion of the Charter or schedule, although Glenn
intends to have either PAP or the LPR RFC ready for a final round of
comments by the next meeting, and the other polished up by the next one.
Attendees
Charles Bazaar bazaar@emulex.com
Bruce Crabill bruce@umdd.umd.edu
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Bill Durham durham@MDC.COM
Elizabeth Feinler
Tom Grant grant@xylogics.com
Keith Hacke hacke@informatics.wustl.edu
Ajay Kachrani kachrani@regent.enet.dec.com
Neil Katin katin@eng.sun.com
Kenneth Key key@cs.utk.gdy
Charles Kimber
Anders Klemets klemets@cs.cmu.edu
John Linn ULTRA::LINN
David Lippke lippke@utdallas.edu
Joshua Littlefield josh@cayman.com
Leo McLaughlin ljm@ftp.com
Donald Merritt don@brl.mil
Keith Moore moore@cs.utk.edu
Michael Patton map@lcs.mit.edu
Jan Michael Rynning jmr@nada.kth.se
Sam Sjogren sjogren@tgv.com
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