[OpenSIPS-Users] newtran() limitations

[Brett Nemeroff]

Bogdan,This kind of explanation is really helpful. If you don't mind, I'd
like to ask a little more detail.

Can you please explain when it would be necessary to force creation of a
transaction where t_relay wouldn't suffice?

Thanks,
Brett


On Wed, Oct 7, 2009 at 9:50 AM, Bogdan-Andrei Iancu
<bogdan at voice-system.ro>wrote:

> Hi Stan,
>
> Just to explain you want actually happens when you do t_newtran() :
>
> This function forces the creation of the transaction (which otherwise is
> automatically done by functions like t_relay() and t_reply() ). Part of
> creating the transaction is cloning of the current request into shared
> memory (cloned from pkg into shm). We need this copy in transaction (is
> shared mem) as the processing of this request may continue in a failure
> route (somewhere later, in other process).
>
> So, the warning is about this cloning/copy action - the request, as it
> is at that moment, will be copied into shm for later usage -
> whenever/whenever you do use later the transaction, you will see the
> message (and its changes) from the cloning time. Changes that are copies
> at cloning time are the lumps (changes on the textual level). Other
> things like flags, RURI are updated in transaction at t_relay() time.
>
> Hope this story will answer your questions :)
>
> Regards,
> Bogdan
>
> Stanisław Pitucha wrote:
> > Hi,
> >
> > I'd like to know what exactly does this note mean: (from the
> documentation)
> >
> > "NOTE that the changes on the request that are made after this
> > function call will not be saved into transaction!!!"
> >
> > What is the limitation in practice / what is saved into transaction.
> > In details - if I have an INVITE packet and call t_newtran() on it:
> > - will modification of the message body take effect on t_relay()?
> > (done both before and after newtran)
> > - will modification of $ru and $du have any effect after newtran()
> > - what other scenarios should I think about that might be affected?
> >
> >
>
>
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