[OpenSER-Devel] Fwd: SIP ping and usrloc

Jason Penton jason.penton at smilecoms.com
Fri Jul 4 08:34:56 CEST 2008


Hi Olle,

Long time. Thanks - i'm going to get going on this then and will let the
list know.

Cheers
Jason

On Fri, Jul 4, 2008 at 8:14 AM, Johansson Olle E <oej at edvina.net> wrote:

>
>>
>> Hi *,
>>
>> Is there already functionality within OpenSER to make sure that a contact
>> is actually alive. i.e. UA registers and slightly afterwards drops off the
>> network. Now when UA is called by UA2, there is silence as the SIP packets
>> are sent to UA -  which now doesnt exist.
>>
>> I would like to implement some functionality in usrloc to do a SIP ping
>> (maybe using OPTIONS) before returning a contact making sure the contact is
>> 'alive'?
>>
>> any other ideas?
>>
>
> OpenSER has a NAT keepalive function that sends requests to keep the NAT IP
> flow open, but not to keep status as far
> as I know.
>
> Asterisk has the functionality you need, where it use an OPTIONs message to
> monitor the latency and
> status of the UA.
>
> Maybe this is something that could be added to the presence modules in
> OpenSER.
>
> /O
>
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