[SR-Users] Create new listener on the fly

Wed Nov 23 16:03:27 CET 2022

Hello.
I'm wondering why not having the ability to create a SIP listener on the
fly/usage instead of bunch of listeners at startup can be a limitation. I
believe each listener can serve multiple ipsec connections, or it is not
the case?
--
obelousov.tel

On Thu, Oct 27, 2022 at 5:26 PM Carsten Bock <carsten at ng-voice.com> wrote:

> Hi Hossein,
>
> due to those limitations, we are using a custom, in-house solution for our
> MNO/MVNO deployments, which we haven't released as open-source (yet).
>
> Thanks,
> Carsten
>
> --
> Carsten Bock I CTO & Founder
>
> ng-voice GmbH
>
> Trostbrücke 1 I 20457 Hamburg I Germany
> T +49 179 2021244 I www.ng-voice.com
>
> Registry Office at Local Court Hamburg, HRB 120189
> Managing Directors: Dr. David Bachmann, Carsten Bock
>
>
> Am Mi., 26. Okt. 2022 um 18:29 Uhr schrieb H Yavari <
> hyavari at rocketmail.com>:
>
>> Hi Casrten,
>>
>> Thanks for the comment. I know you provide IMS, have you contributed to
>> Kamailio IPsec, or do you have something in-house solution for this part?
>> (I hope this question will not be off-topic)
>>
>> BR
>> Hossein
>>
>>
>> On Wednesday, October 26, 2022 at 06:37:33 AM PDT, Carsten Bock <
>> carsten at ng-voice.com> wrote:
>>
>>
>> Hi Hossein,
>>
>> yes, you are right, it is in-efficient. It may be fine for a private
>> network/PoC/Lab/ or anything else small, but it will not really work for a
>> commercial network - for that you need something different.
>>
>> Thanks,
>> Carsten
>> --
>> Carsten Bock I CTO & Founder
>>
>> ng-voice GmbH
>>
>> Trostbrücke 1 I 20457 Hamburg I Germany
>> T +49 179 2021244 I www.ng-voice.com
>>
>> Registry Office at Local Court Hamburg, HRB 120189
>> Managing Directors: Dr. David Bachmann, Carsten Bock
>>
>>
>> Am Di., 25. Okt. 2022 um 23:03 Uhr schrieb H Yavari <
>> hyavari at rocketmail.com>:
>>
>> Thanks Alex for your elaboration; you are right.
>> This is the reason that the current ims_ipsec module will create a bunch
>> of listeners at startup that looks not efficient.
>>
>>
>> Regards,
>> Hossein
>>
>>
>> On Tuesday, October 25, 2022 at 01:28:38 PM PDT, Alex Balashov <
>> abalashov at evaristesys.com> wrote:
>>
>>
>> Well, no, it just stems from some knowledge of Kamailio’s multiprocess
>> architecture.
>>
>> Kamailio uses a static pool of preforked SIP worker processes, and this
>> is initialised once upon startup. These child processes are spawned for
>> every listener, and communicate and share data using SysV IPC and shared
>> memory. The shared memory pool is likewise initialised upon startup, as is
>> the small fixed-size area of private memory associated with each other
>> worker process (“package memory”).
>>
>> While perhaps not strictly impossible to alter, this setup isn’t
>> particularly amenable to the dynamic creation and destruction of listeners,
>> or the additional child processes they beget. The child processes need to
>> be forked on startup, before their heap is laden with runtime baggage. All
>> this is relatively expensive to initialise.
>>
>> — Alex
>>
>> > On Oct 25, 2022, at 4:14 PM, H Yavari <hyavari at rocketmail.com> wrote:
>> >
>> > Thanks Alex.
>> > Is there any document or material that tells more about those reasons?
>> >
>> >
>> > Regards,
>> > Hossein
>> >
>> >
>> > On Tuesday, October 25, 2022 at 01:00:18 PM PDT, Alex Balashov <
>> abalashov at evaristesys.com> wrote:
>> >
>> >
>> > Hi,
>> >
>> > Unfortunately, for a variety of architectural reasons, this is not
>> practical.
>> >
>> > — Alex
>> >
>> > > On Oct 25, 2022, at 12:43 PM, H Yavari <hyavari at rocketmail.com>
>> wrote:
>> > >
>> > > Hi Kamailio community,
>> > >
>> > >
>> > > I am running an IPsec server beside Kamailio, so I am interested to
>> know if there is any method to create a SIP listener on a specific port on
>> the fly. I mean, when I create the IPsec SAs through the IPsec server, I
>> ask Kamailio to create a listener/handler for that port too.
>> > > This case might be very rare, but it is always good to hear community
>> ideas.
>> > >
>> > > Thank you.
>> > >
>> > > Regards,
>> > > Hossein
>> >
>> > > __________________________________________________________
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>> >
>> > --
>> > Alex Balashov | Principal | Evariste Systems LLC
>> >
>> > Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
>> > Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>> >
>> >
>> > __________________________________________________________
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>> >
>> > __________________________________________________________
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>> > Important: keep the mailing list in the recipients, do not reply only
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>> --
>> Alex Balashov | Principal | Evariste Systems LLC
>>
>> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
>> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>>
>>
>> __________________________________________________________
>> Kamailio - Users Mailing List - Non Commercial Discussions
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>> Important: keep the mailing list in the recipients, do not reply only to
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>> Important: keep the mailing list in the recipients, do not reply only to
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>> Important: keep the mailing list in the recipients, do not reply only to
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> __________________________________________________________
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> Important: keep the mailing list in the recipients, do not reply only to
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