Hi,

IIR means If I Remember.

Are you also using keepalives sent by clients? I often read that NATs don't refresh their mapping on incoming traffic, you may want to take a look at client keepalives.

Mickael

On 21 באפר 2015, at 07:38, xuefeng zhang <zhangxuefeng1007@gmail.com> wrote:

Hi Daniel,

I understand your reply.The kamailio can set the "IIR" to send the OPTIONS packets period.
But I don't found out the knowledge of the "IIR".

Would you give me some things how to do it.

Thanks!

Xuefeng Zhang

2015-04-20 18:10 GMT+08:00 Daniel-Constantin Mierla <miconda@gmail.com>:
IIR, the keepalives are sent stateless, so no transactions are create
for them. Just OPTIONS packets sent out, resulting in less load on
kamailio (well, comparing with normal transactional forwarding). The
mechanism behind detecting offline users with keepalives is based on a
counter kept in memory for the location record, which is reset if the
reply to OPTIONS comes back. If there are three (or so) keepalives sent
out and none was replied, then the record is removed. Practically there
is no retransmission for those keepalive requests, no special states,
just this counter in memory per location record. Given this, (again
iirc), this feature doesn't work with db_mode set to database only.

Cheers,
Daniel

On 20/04/15 10:46, Mickael Marrache wrote:
> Didn't know about that, it's interesting.
>
> I'm curious about the load impact of this feature, since keepalives are
> generally sent every 30 sec.
>
> -----Original Message-----
> From: sr-users [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of
> Daniel Grotti
> Sent: Monday, April 20, 2015 11:40 AM
> To: sr-users@lists.sip-router.org
> Subject: Re: [SR-Users] Expect the kamailio's sip account is unregistered
> state when the client app is shutdown
>
> Hi,
> you may want to use:
>
> http://www.kamailio.org/docs/modules/4.2.x/modules/nathelper.html#nathelper.
> p.keepalive_timeout
>
>
> --
> Daniel Grotti
> VoIP Engineer
>
>
> Sipwise GmbH
> Europaring F15 | 2345 Brunn am Gebirge, Austria | www.sipwise.com
>
> On 04/20/2015 10:34 AM, Filip Malenka wrote:
>> Thank you for information..
>> What can Kamailio do about clients, that exit abnormally (e.g. crash, turn
> off, ..) which do unregister properly? Can Kamailio send this "expire=0" on
> behalf of these clients?
>> Can Kamailio determine that a client got offline based on e.g. TLS
> connection or other "heartbeats"?
>> On 20.04.2015 10:16, Daniel Grotti wrote:
>>> Hi,
>>> here you are:
>>>
>>> https://tools.ietf.org/html/rfc3665#section-2.4
>>>
>>>
>>>
>>> --
>>> Daniel Grotti
>>> VoIP Engineer
>>>
>>>
>>> Sipwise GmbH
>>> Europaring F15 | 2345 Brunn am Gebirge, Austria | www.sipwise.com
>>>
>>> On 04/20/2015 10:10 AM, Mickael Marrache wrote:
>>>> Hi,
>>>>
>>>>
>>>>
>>>> You need to configure your client to un register when the app is closed.
>>>>
>>>>
>>>>
>>>> For that, your client must send a REGISTER with Expires: 0.
>>>>
>>>>
>>>>
>>>> Mickael
>>>>
>>>>
>>>>
>>>> *From:*sr-users [mailto:sr-users-bounces@lists.sip-router.org] *On
>>>> Behalf Of *xuefeng zhang
>>>> *Sent:* Monday, April 20, 2015 10:58 AM
>>>> *To:* Daniel-Constantin Mierla; Kamailio (SER) - Users Mailing List
>>>> *Subject:* [SR-Users] Expect the kamailio's sip account is
>>>> unregistered state when the client app is shutdown
>>>>
>>>>
>>>>
>>>> Hi Daniel,
>>>>
>>>>
>>>>
>>>> When the client's app is closed,the sip account may be registered
>>>> state,because the expired time may have some rest time.I want to
>>>> implement when the client's app is closed,the account also unregister.
>>>>
>>>>
>>>>
>>>> How can I implement this function?Would you give me some advices?
>>>>
>>>>
>>>>
>>>> Thanks!
>>>>
>>>>
>>>>
>>>> Xuefeng Zhang
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>>>> list sr-users@lists.sip-router.org
>>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>>>
>>> _______________________________________________
>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>>> list sr-users@lists.sip-router.org
>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>> list sr-users@lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users@lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users@lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

--
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio World Conference, May 27-29, 2015
Berlin, Germany - http://www.kamailioworld.com


_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users