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Re: [MMUSIC] Partial Offer/Partial Answer draft - MIME type value

Christer Holmberg <christer.holmberg@ericsson.com> Fri, 18 October 2013 18:12 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Adam Roach <adam@nostrum.com>, "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: [MMUSIC] Partial Offer/Partial Answer draft - MIME type value
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Date: Fri, 18 Oct 2013 18:11:55 +0000
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Subject: Re: [MMUSIC] Partial Offer/Partial Answer draft - MIME type value
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Hi,

The draft says that one will use the "application/sdpfrag" MIME type value for POFs and PANs.

What about using "application/sdp" - ie the same MIME type value as for "normal" SDP Offers and Answers? From a SDP syntax perspective it should not be a problem - any SDP parser will be able to parse a POF/PAN.

An entity that does not support POF/PAN would probably trigger an error. BUT, maybe that is good: It could be a mechanism to verify that all SDP processing/inspecting entities along the signaling path actually support the mechanism. At least for SIP I can't think of any other mechanism to do that (we can't use Proxy-Require).

Comments?

Regards,

Christer

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