Hi,
If you have commited changes when the 200 OK sent, those
changes are already used when the 200 is sent. So, it is not a late commitment
in that sense.
It IS a late commitment in the sense that you DO have
to possibilities to reject EVERYTHING (including modficiations triggered by
UPDATE etc) by sending a 4xx response. But, again, the draft recommends you
against doing that if changes have already been committed.
At the end of the day, it is the group that will decide
which way we move forward.
Regards,
Christer
From: gao.yang2@xxxxxxxxxx [mailto:gao.yang2@xxxxxxxxxx]
Sent: 4. maaliskuuta 2009 10:32
To: Gonzalo Camarillo
Cc: Christer Holmberg; sipping; sipping-bounces@xxxxxxxx
Subject: 答复: Re: 答复: Re: 答复: Re: 答复: Rollback issue: a proposal
Let's talk the point:
Does 200OK of Re-INVITE is the "Late commitment" of everything during it?
I do not think so.
I insist that 200OK of Re-INVITE is the "Late commitment" of only the modification triggered by Re-INVITE, not everything during it.
The modification including "Target refresh" and Session.
Precondition notification is part of the modification triggered by Re-INVITE, so it obeys commitment/rollback of the original one.
And eveything is clear, I think there is no interoperability issue.
Gonzalo Camarillo <Gonzalo.Camarillo@xxxxxxxxxxxx> 2009-03-04 16:19
Christer Holmberg <christer.holmberg@xxxxxxxxxxxx> gao.yang2@xxxxxxxxxx, sipping-bounces@xxxxxxxx, sipping <sipping@xxxxxxxx> Re: 答复: Re: 答复: Re: 答复: Rollback issue: a proposal
Hi,
well, if after reading the disadvantages of doing so you still want to
use it, then you probably like to have interoperability problems :o)
Cheers,
Gonzalo
Christer Holmberg wrote:
> Hi,
>
> I don't think the draft forbids you from using 4xx to re-INVITE, but it explains the disadvantage of doing so if you have committed changes.
>
> Regards,
>
> Christer
>
>
>
>
>
>
>
>
> ________________________________
>
> From: sipping-bounces@xxxxxxxx [mailto:sipping-bounces@xxxxxxxx] On Behalf Of gao.yang2@xxxxxxxxxx
> Sent: 4. maaliskuuta 2009 10:08
> To: Gonzalo Camarillo
> Cc: sipping-bounces@xxxxxxxx; sipping
> Subject: 答复: Re: 答复: Re: 答复: Rollback issue: a proposal
>
>
>
> I think I explained why I can use 4xx of Re-INVITE, without making anything ambiguously.
>
> The point is that do you agree that later UPDATE/200OK commit the target refresh.
>
>
>
>
> Gonzalo Camarillo <Gonzalo.Camarillo@xxxxxxxxxxxx>
>
> 2009-03-04 15:46
>
>
> 收件人
> gao.yang2@xxxxxxxxxx
> 抄送
> sipping-bounces@xxxxxxxx, sipping <sipping@xxxxxxxx>
> 主题
> Re: 答复: Re: 答复: Rollback issue: a proposal
>
>
>
>
>
>
> Hi,
>
> > [Gao] I just wanted to say if UPDATE/200OK committed the target refresh,
> > it should be free for 4xx of Re-INVITE.
>
> I insist. You should re-read the draft. It explains why you should not
> use 4xx response to cancel changes. The advantage of the approach in the
> draft is that it does not require normative changes to already
> implemented specs. It is more a BCP kind of spec. That is why its
> backwards compatibility properties are good.
>
> Cheers,
>
> Gonzalo
>
>
>
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