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Re: [sipcore] Eric Rescorla's Discuss on draft-ietf-sipcore-sip-push-21: (with DISCUSS and COMMENT) - the COMMENT issues

Christer Holmberg <christer.holmberg@ericsson.com> Wed, 09 January 2019 15:57 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Ben Campbell <ben@nostrum.com>
CC: Eric Rescorla <ekr@rtfm.com>, "sipcore-chairs@ietf.org" <sipcore-chairs@ietf.org>, "sipcore@ietf.org" <sipcore@ietf.org>, "draft-ietf-sipcore-sip-push@ietf.org" <draft-ietf-sipcore-sip-push@ietf.org>, The IESG <iesg@ietf.org>, "br@brianrosen.net" <br@brianrosen.net>
Thread-Topic: Eric Rescorla's Discuss on draft-ietf-sipcore-sip-push-21: (with DISCUSS and COMMENT) - the COMMENT issues
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Date: Wed, 09 Jan 2019 15:56:52 +0000
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Subject: Re: [sipcore] Eric Rescorla's Discuss on draft-ietf-sipcore-sip-push-21: (with DISCUSS and COMMENT) - the COMMENT issues
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Hi,

...

>>> Yeah, this seems like a pretty major architectural flaw in this design, tbh, one that is 
>>> remedied by just using RFC 8030-style notifications that contain content.
>>
>> Other push notification services support content too, but we decided that we are not going to specify that for SIP push.
>>
>> IF there comes a future case, where multiple SIP usages of push notifications have to co-exist, we can define usage of content (and e.g., define that SIP push is default).
>
> Just a note: This came up in WG discussion and again during the AD evaluation. IIRC, the consensus was to not attempt to solve the issue in this draft.
>
> That being said, I think it would be worth including a note that the potential exists and is being punted to the future.

Section 4.1 contains the following:

   "NOTE: If the SIP UA application wants to use push notifications for
   other purposes than to trigger binding-refresh requests, it needs to
   be able to distinguish between the different purposes when receiving
   push notifications.  Mechanisms for doing that are outside the scope
   of this specification."

Regards,

Christer

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