Re: [Ecrit] I-D Action: draft-ietf-ecrit-car-crash-10.txt
Randall Gellens <rg+ietf@randy.pensive.org> Thu, 22 September 2016 22:32 UTC
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Date: Thu, 22 Sep 2016 15:32:45 -0700
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
From: Randall Gellens <rg+ietf@randy.pensive.org>
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Cc: ECRIT <ecrit@ietf.org>
Subject: Re: [Ecrit] I-D Action: draft-ietf-ecrit-car-crash-10.txt
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At 6:25 PM -0400 9/22/16, Paul Kyzivat wrote: > see end > > On 9/22/16 5:46 PM, Randall Gellens wrote: >> At 3:08 PM -0400 9/22/16, Paul Kyzivat wrote: >> >>> Randall, >>> >>> (Including ecrit) >>> >>> On 9/22/16 12:26 PM, Randall Gellens wrote: >>>> Hi Paul, >>>> >>>> Thanks very much for the quick review and comments. I'm making other >>>> changes requested by Christer, and I want to fix the ones you found as >>>> well. >>>> >>>> Section 12 is the Security Considerations. >>> >>> In the -10 version I am looking at section 12 is Examples. >> >> Sorry, I missed that you were replying to -10; I'd incorrectly assumed >> you were replying to -12. >> >>> >>>> Did you mean Section 11, the >>>> Examples? Or maybe Figure 10 (one of the examples)? More to the >>>> point >>>> on correct C-D, there's text in Section 6 that says: >>>> >>>> If the body part >>>> containing the MSD or metadata/control block is the only body part, >>>> it has a Content-Disposition header field value of "Info-Package; >>>> handling=optional". If it is contained within a multipart body >>>> part, >>>> it has a Content-Disposition header field value of "By-Reference; >>>> handling=optional". >>>> >>>> So this is wrong? What should it say? >>> >>> That text seems ok, at least for this case. >>> >>> IIUC it isn't discussing the C-D *on* the multipart/mixed container. >>> It is discussing parts *within* the multipart. Those seem to be >>> correctly tagged. >>> >>> The "Info-Package" C-D is only applicable for an INFO message. Since >>> this isn't an INFO message it makes no sense to use it. >> >> That was fixed in -12. >> >> I'm about to upload -13, which fixes the C-D issues. I also added text >> to clarify that "handling=optional" is only used in the initial INVITE, >> to protect the INVITE from being rejected if it is processed by a legacy >> element (such as a gateway between SIP and CS) that does not understand >> an MSD. I fixed the examples to comply. > > handling=optional is probably wrong on the multipart for an INVITE > that contains an SDP offer. The processing of the SDP isn't > optional, and if you encounter a UAS that doesn't support multipart > then you want it to fail, not to be treated as an INVITE with no > offer. Sorry for not being clear in my earlier message; the clarifications in the draft say that "handling=optional" in the initial INVITE applies to the MSD (in eCall), the VEDS (in car-crash), and the metadata/control object (in both) and the PIDF-LO. It doesn't apply to the SDP nor the enclosing multipart, for the reasons you state. -- Randall Gellens Opinions are personal; facts are suspect; I speak for myself only -------------- Randomly selected tag: --------------- . . . It wasn't until the jet engine came into being and that engine was coupled with special airplane designs - such as the swept wing - that airplanes finally achieved a high enough work capability, efficiency and comfort level to allow air transportation to really take off. --Joseph F. Sutter, Boeing Commercial Airplanes
- Re: [Ecrit] I-D Action: draft-ietf-ecrit-car-cras… Paul Kyzivat
- [Ecrit] I-D Action: draft-ietf-ecrit-car-crash-10… internet-drafts
- Re: [Ecrit] I-D Action: draft-ietf-ecrit-car-cras… Paul Kyzivat
- Re: [Ecrit] I-D Action: draft-ietf-ecrit-car-cras… Randall Gellens
- Re: [Ecrit] I-D Action: draft-ietf-ecrit-car-cras… Paul Kyzivat
- Re: [Ecrit] I-D Action: draft-ietf-ecrit-car-cras… Randall Gellens