[OpenSIPS-Users] multiple registration

[Bogdan-Andrei Iancu]

Hi David,

Right now there is no way to overwrite an existing contact from script 
(of course, only if it matches:) ). To solve this, I see two possible 
solutions:
    1) implement the possibility to do discard old contacts before 
adding a new one (this might be use for implementing a yahoo like 
behaviour for registrations), but might break a bit SIP (see my previous 
comments about not be able to notify a phone about being unregistered)
    2) find a may to "convince" usrloc to overwrite the existing contact 
by changing the new contact to match the old one (maybe suppressing port 
matching)......

Regards,
Bogdan

David Villasmil wrote:
> Thanks for answering.
>
>      Yes, that's what I need. The new record should override the old 
> one (provided it comes from the same public IP) although this should 
> be configurable via script. I'm sure there is a way but I just can't 
> figure it out.
>
>
> David
>
> On Sat, Aug 9, 2008 at 2:51 PM, Bogdan-Andrei Iancu 
> <bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>> wrote:
>
>     Hi David (again :)),
>
>     This is a kind of old problem. Coding is not an issue, but
>     logically speaking, it is :). When you deal with multiple contacts
>     per AOR, what should be the logic when limiting the number of records
>       1) discard old ones?
>       2) discard new ones?
>
>     if you do 1) (like yahoo does), it will be messy as you have no
>     mechanism to notify back a phone that it was unregistered (while
>     refusing a new registration is perfectly clean)
>
>     if you do 2) , there is the problem you mentioned - and belief me,
>     there is quite a common problem !
>
>     So, what you are looking is a way to have only one contact per AOR
>     and any new contact will override the existing one, right?
>
>     Regards,
>     Bogdan
>
>     David Villasmil wrote:
>
>         Hello all again!
>
>             I know one can limit the number of registrations allowed
>         for a contact, but how can I DISCARD previous contacts? i.e.
>         UACs behind asymmetric NATs have multiple contacts, same ip,
>         same user, but different source port! I could just set the
>         expiration to a low value but that's not what I want as it
>         still generates multiple contacts... What I want is to delete
>         any previous contacts for the registrating user if the source
>         IP is the same as the prevoius, how can I achive that?
>
>         Thnks
>
>
>         David
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