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

[Emil Ivov <[e-mail]>]

Yes, they do have an impact. They reset it. Please describe a scenario
where you think this is a problem.

--sent from my mobile
On 20 Oct 2013 22:38, "Christer Holmberg" <[e-mail]>
wrote:

>  Hi Emil,****
>
> ** **
>
> No matter whether you consider the ICE state (including the candidates)
> part of the SDP session state or not, SDP session modification requests
> (read: SDP Offers and Answers) DO impact the ICE State, as Offers and
> Answers can be used to carry candidates.****
>
> ** **
>
> Regards,****
>
> ** **
>
> Christer****
>
> ** **
>
> *Lähettäjä:* Emil Ivov [mailto:[e-mail]]
> *Lähetetty:* 20. lokakuuta 2013 23:23
> *Vastaanottaja:* Christer Holmberg
> *Kopio:* Paul Kyzivat; Adam Roach; mmusic
> *Aihe:* Re: VS: [MMUSIC] Partial Offer/Partial Answer draft - MIME type
> value****
>
> ** **
>
> One more thought:****
>
> Please understand that trickle ICE is NOT a session modification. Please
> try to isolate the SDP syntax that it uses from general O/A. It is not part
> of it.****
>
> Think of it as JSON if that would make thinks easier.****
>
> Emil****
>
> --sent from my mobile****
>
> On 20 Oct 2013 22:18, "Emil Ivov" <[e-mail]> wrote:****
>
> Christer, "I tried to explain" to you that what you are saying has been
> addressed and cannot happen. If you believe that there is a specific
> situation that is still possible and is a problem, then please describe
> that rather than continuing to suggest that things don't work without any
> valid arguments whatsoever.****
>
> --sent from my mobile****
>
> On 20 Oct 2013 21:50, "Christer Holmberg" <[e-mail]>
> wrote:****
>
>
> Hi,
>
> >> Example:
> >>
> >> 1. Alice sends an SDP Offer to Bob.
> >>
> >> 2. Bob sends the SDP Answer to Alice, with candidates A, B and C.
> >>
> >> 3. After that, Bob sends, using trickle ICE, candidates D and E to
> Alice.
> >>
> >> If Alice receives the SDP Answer first, and then the trickle ICE
> request, she will assume that Bob first provided candidates A, B and C (in
> the SDP Answer), and then added D and E (in the trickle ICE request).
> >>
> >> If Alice receives the trickle ICE request first, and then the SDP Answer
> >
> > Don't do that then.
> >
> > It's been pretty clear from the start that any session *modification*
> mechanism that does not also contain the full session state completely
> falls apart in the face of unordered delivery. This is a fundamental
> information problem, and you aren't going to write rules that somehow cause
> it not to be true.
> >
> > We haven't yet tackled how to send trickle ICE in SIP, much less partial
> offers and partial answers. When we do, the only way it's going to have any
> chance of working at all is by requiring ordered delivery.
>
> I totally agree, and my opinion (which I tried to explain to Emil) is that
> it applies also to candidates.
>
> Regards,
>
> Christer****
>