Led by chairs Keith Drage and Dean Willis.
The agenda was accepted as presented.
The chairs reviewed the working group's progress since the last meeting.
A brief slide on draft-hilt-sip-correction-503 was presented by the chairs, and teh working group was asked to consider the draft and discuss it on the mailing list.
The posted agenda was:
Start Time | Topic | Discussion Lead | Reading List |
---|---|---|---|
0900 | Agenda Bash and Status | Chairs | This document |
0915 | SIPS WGLC | Francois Audet | <draft-ietf-sip-sips-05.txt |
0935 | Outbound WGLC | Rohan Mahy Cullen Jennings |
draft-ietf-sip-outbound-10.txt" rel="nofollow">draft-ietf-sip-outbound-10.txt |
1005 | Resource Priority Header Issues | James Polk | draft-polk-sip-rph-in-responses-00 draft-polk-sip-rph-new-namespaces-01.txt" rel="nofollow">draft-polk-sip-rph-new-namespaces-01.txt |
1030 | Delivering R-URI and Parameters to UA | Jonathan Rosenberg | draft-rosenberg-sip-ua-loose-route-01.txt |
1105 | MIME Body Handling | Gonzalo Camarillo | draft-camarillo-sip-body-handling-01.txt |
1130 | End of Session |
Start Time | Topic | Discussion Lead | Reading List |
---|---|---|---|
0900 | Agenda Bash and Status | Chairs | This document |
0905 | Fork Loop Fix and Corrections | Robert Sparks | draft-ietf-sip-fork-loop-fix-05 draft-sparks-sipping-max-breadth-01 |
0925 | SAML | Hannes Tschofenig Jeff Hodges |
draft-ietf-sip-saml-02 |
0945 | eTags For Notification | Aki Niemi | draft-ietf-sip-subnot-etags-00.txt |
1000 | UA-Driven Privacy | Mayumi Munakata | draft-munakata-sip-privacy-new-01.txt |
1020 | Domain Certs | Vijay Gurbani Scott Lawrence |
draft-gurbani-sip-domain-certs-06.txt |
1045 | Certificate Authentication | Steve Dotson | draft-dotson-sip-certificate-auth-03.txt |
1100 | INFO Considered Harmful | Eric Burger | draft-burger-sip-info-00 |
1115 | Media identity | Dan Wing | draft-wing-sip-identity-media-00.txt |
1130 | End of session |
Led by Francois Audet.
Slides presented.
Issues raised during WGLC discussed.]
currently two error codes
Proposal is to have one error code with Allow-URI and Require-URI header
Discussion ranged widely. Topics included:
Conclusion:No conclusion noted. Chairs are to schedule a conference call. (Ed: Topic has subsequently been raised on SIP mailing list).
Conclusion: Consensus is that this section has been superceded and shall be deleted.
Led by Rohan Mahy.
Slides presented.
Changes to draft since last meeting reviewed.
Conclusion: Consensus: no objection to removing it.
Conclusion: Consensus: no objection to proposed merger.
Conclusion: Consensus: Change draft to correct the error.
Led by James Polk
Slides presented.
Suggestion: That more text be added to illustrate the utility of this change.
Suggestion: Stop updating Table 2 (chairs to take to list).
Poll on "WG Adoption" reported moderate response with no one opposing.
Poll on "Accepting this document as baseline" reported weak response with no opposition.
Conclusion: Adopt as WG item. Chairs to work with ADs for milestone.
Led by James Polk.
Slides presented.
Author to remove description of semantics of '-', just establish registry.
Conclusion: Adopt as WG item. Chairs to work with ADs and establish a milestone.
led by Jonathan Rosenberg.
Slides presented.
Alternative proposed on the list: use P-Called-Party-ID.
Discussion centered on P-Called-Party-IDs lack of standards-track status and need for further work to meet requirements. However, tehre are some existing implementations.
Noted that this is like the e-mail "faceted address problem". URI parameters might be made to work. It would be desirable to avoid "local knowledge".
Further work is needed to address issues with re-targeting & routing.
Noted that if solution is a parameter, input & output both have to be a sip URI
Suggested that a writeup of the suggested P-Called-Party-ID would be useful.
Noted that we need to coordinate any changes to P-Called-Party-ID with 3GPP, as IMS might be affected.
Poll: make decision now? or later when more documentation available?
Conclusion: To revisit problem later when there is more documentation of the other solutions.
Led by Gonzalo Camarillo
Slides presented.
Conclusion: General consensus that our specifications must proplerly exercise MIME. "Profiling" of MIME is not acceptable.
Conclusions:
Conclusion: Support for multipart/mixed in UAs is a MUST.
Conclusion: Default for multipart/mixed is 'render', and we do not need a new disposition type.
Conclusion: Agreed that transfer encoding for binary payloads in SIP messages MUST be binary.
Conclusions:
Conclusion: No consensus, discussion deferred to the list.
Agenda accepted as presented.
Document draft-ietf-connect-reuse discussed, including a new abstract and change of scope. WG showed a consensus to continue the work and publish the document. Jonathan Rosenberg strongly objected, and is to meet offline with Vijay Gurbani and attempt a compromise.
Led by Robert Sparks.
Slides presented.
Conclusion: Agreed that we would work with Max-Breadth approach and see if Security ADs will accept it.
Led by Robert Sparks.
Slides presented.
Open question on format. Many readers find current approach difficult to follow.
Suggested that we should replace whole chapters, but these can be very long.
Suggested that we do fixes like extensions; do not make a list of several small corrections.
Alternative proposal: cite the text which was changed
Suggested that implementors need a complete document that is readable (meaning a new RFC 3261), and that a diff is too hard to read.
It would be good to have an automatic way to get a final document, but change ordinality would make this very difficult.
Conclusion: Apparently there was no real conclusion here.
Led by Jeff Hodges.
Slides presented.
Noted that should no be restricted to http/htttps. For example, cid: might be needed.
Will update RFC 4474.
Agreed that we need by-value and by-reference.
Authors asked to add discussion of privacy.
Authors were asked to propose and discuss changes "on list" instead of just making them,
Conclusion: WG is mostly confused, and more work is needed on
the doc.
Led by Aki Niemi.
Slides presented.
Two use cases were presented:
Conclusion: Document is confusing. Authors are to clarify in document.
No current justification for option tag.
Conclusion: Remove from document.
Semantics of 204 response code may be unclear, although it has a use case (lost messages).
Conclusion: Author to check on references for 204, clarify if needed.
There may also be some relation here to the NOTIFY paise work, which
may need to be clarified before WGLC.
Led by Mayumi Munakata
Slides presented.
Comments:
led by Scott Lawrence
Slides presented.
PKIX reviewer noted that the CN usage in this draft is inconsistent with current specifications.
Rohan Mahy reports that certs issued today use CN.
Poll: Does the WG wish to work on this problem?
Conclusion: The WG wishes to work on this problem.
Poll: Does the WG wish to adopt this document as baseline text toward a working group effort?
Conclusion: The WG wishes to adopt this draft. Chairs are directed to work with AD to schedule.
Led by Steve Dotson.
Slides presented.
Discussion focused on whether the requirements are clear based on the current draft, and especially the use case therein. The general consensus is that this is not clear, and that the draft fails to make a case for the mechanism proposed. Several use cases were proposed during discussion. Suggestions were made that the draft be revised to account for these concerns, and that more emphasis be explained on why existing mechanisms, such as SIP Identity, might not be suitable.
It was also suggested that the authors may wish to discuss user versus device certification and authentication, and explain how things like pre-provisioned device certificates might be reasonably exercised in the scenarios addressed by the draft.
Conclusion: Authors to revise as suggested.
Led by Eric Burger.
Slides presented included in proceedings.
Discussion covered history of INFO, prior guidance on INFO usages, non-standard usages such as DTMF, the SIP extension architecture, and what, if anything, could now be reasonably addressed.
Three options were proposed:
Conclusions:
Led by Dan Wing.
Slides presented.
Dan Wing reports that Cisco has made IPR claims related to this material.
Discussion centered on difficulties with applying RFC 4474 techniques through session border controllers and other B2BUA.
Some participants in the discussion questioned the use case or wondered whether the problem posed by the use case needs to be solved.
Conclusion: There was no consensus to pursue the work at this time, but the WG might be willing to reconsider if more convincing use cases can be provided.