the parameter desc_time_order ( set to 1) order the conctact in descending time order, and use the most recently updated/created user.
and, if I understand, if the user A register from address 1 (Home), and more later register from address 2 (work)
(the REGISTER is sent every minute from two address)
and the soft re-send the register from address 1
 
how recognize openser that address 2 is the valid address?
I attach the doc from this two parameters.
 
 
 
1.3.12. desc_time_order (integer)
If set to 1 then all contacts will be ordered in descending modification time order. In this case the most recently updated/created contact will be used.
 
Default value is 0.
 
Example 1-12. Set desc_time_order parameter
 
...
modparam("registrar", "desc_time_order", 1)
 

1.3.9. append_branches (integer)
The parameter controls how lookup function processes multiple contacts. If there are multiple contacts for the given username in usrloc and this parameter is set to 1, Request-URI will be overwritten with the highest-q rated contact and the rest will be appended to sip_msg structure and can be later used by tm for forking. If the parameter is set to 0, only Request-URI will be overwritten with the highest-q rated contact and the rest will be left unprocessed.
 
Default value is 1.
 
Example 1-9. Set append_branches parameter
 
...
modparam("registrar", "append_branches", 0)
...
----- Original Message -----
From: Bogdan-Andrei Iancu
To: Steve Blair
Cc: users
Sent: Thursday, September 28, 2006 10:52 AM
Subject: Re: [Users] UN-REGISTER

of course there is contact timeout as each contact is registered for a
limited time period.

a more elegant solution is to use the "desc_time_order" and
"append_branches" module parameter in order to retrieve from usrloc only
the latest contact. See:
    http://openser.org/docs/modules/1.1.x/registrar.html

regards,
bogdan

Steve Blair wrote:

>
> You could also get creative and upon successful registration exec a
> script that will examine the location table and remove (or manipulate
> as you want) specific registrations. If these moves happen often this
> approach will not scale well. If you only need one registration per
> user then setting the max_contacts parameter is the easiest way to
> accomplish this goal.
>
> _Steve
>
> Max Gregorian wrote:
>
>> Perhaps implement Registration Timeouts.
>> 
>> If the aim is to stop the user from connecting using that IP address,
>> then you could, on OpenSER, do something along the lines of:
>> 
>>
>>    if(src_ip==192.168.0.55 <http://192.168.0.55/>)
>>    {
>>       sl_send_reply("404", "User not found..");
>>
>>    };
>>
>> 
>>
>>
>> 
>> On 9/28/06, *Bogdan-Andrei Iancu* <bogdan@voice-system.ro
>> <mailto:bogdan@voice-system.ro>> wrote:
>>
>>     Hi Javier,
>>
>>     that must be done by the phone.
>>
>>     regards,
>>     bogdan
>>
>>     Javier wrote:
>>
>>     > can I unregister the the firsth register ?
>>     >
>>     >
>>     >     ----- Original Message -----
>>     >     *From:* Daniel-Constantin Mierla
>>     <mailto:daniel@voice-system.ro <mailto:daniel@voice-system.ro>>
>>     >     *To:* Javier Ramirez <mailto: jvr_78@yahoo.com.ar
>>     <mailto:jvr_78@yahoo.com.ar>>
>>     >     *Cc:* users <mailto:users@openser.org
>>     <mailto:users@openser.org>>
>>     >     *Sent:* Saturday, September 23, 2006 5:36 PM
>>     >     *Subject:* Re: [Users] UN-REGISTER
>>     >
>>     >     If the user closes the sip client on 0.55, then the client
>>     should
>>     >     automatically un-register. If not, then the user will have two
>>     >     contacts
>>     >     and both phones will ring.
>>     >
>>     >     If you want to limit the number of registered contacts, you
>>     can do it
>>     >     via max_contacts parameter of registrar module:
>>     >
>>     >    
>> http://www.openser.org/docs/modules/1.1.x/registrar.html#AEN233
>>     >
>>     >     Cheers,
>>     >     Daniel
>>     >
>>     >
>>     >     On 09/22/06 23:47, Javier Ramirez wrote:
>>     >     > Hi, I have a question:
>>     >     >
>>     >     > the user A is register, the ip of register is 192.168.0.55
>>     <http://192.168.0.55>.
>>     >     > the user change PC, and this PC have the ip 192.168.0.66
>>     <http://192.168.0.66>
>>     >     >
>>     >     > the user register again, in the new machine, but, how to
>>     unregister
>>     >     > the firsth registration from 192.168.0.55
>>     <http://192.168.0.55> ?
>>     >     >
>>     >     > best regards
>>     >     > Javier
>>     >     >
>


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