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Re: [sipcore] 3264 offer a=sendonly in context of session modification

Paul Kyzivat <pkyzivat@alum.mit.edu> Fri, 17 November 2023 15:45 UTC

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From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [sipcore] 3264 offer a=sendonly in context of session modification
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Russ,

On 11/17/23 9:09 AM, Russ Penar wrote:
> Greetings and salutations,
> 
> In your work (especially in the wild) have you come across offers with 
> a=sendonly (in context of existing dialog session update) outside of 
> hold scenarios?
> If yes, please share the scenario and related trivia.
> 
> I understand /new /dialog offer with a=sendonly likely (always?) signals 
> a scenario other than hold.
> 
> For /existing /dialog session update offer with a=sendonly, I have not 
> been successful in identifying an applicable scenario (beyond hold) and 
> request your expert perspective(s) please.

I don't know of such an example. But I wonder why you ask. Are you 
asking as a recipient of such an offer? If so, why does it matter? The 
behavior you produce in response is governed by what is in the offer, 
the internal state of your endpoint, and the desires of the user of your 
endpoint (to the extent that you know them.) It should not depend on 
your inference of the desires of the other device or its users.

	Thanks,
	Paul

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