Create new listener on the fly - sr-users

25 Oct 2022

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 <http://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@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@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 <http://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@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@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@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@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@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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        -- 
        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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