[SR-Users] Generate UUID in Kamailio Script

Fri Aug 9 16:30:52 CEST 2013

On 8/9/13 1:13 PM, Grant Bagdasarian wrote:
>
> Yeah, I do need a dynamic GUID.
>
> From what I understood from Daniel:
>
> use $sruid to get the unique id*(it will be a new value for each use 
> of it).*
>
yes, for clarification:

$var(x) = $sruid;
$var(y) = $sruid;

the result is that $var(x) != $var(y)
>
> Does this mean that for each request the $sruid variable returns a new 
> unique id or the same for each kamailio instance?
>

For a better understanding, the value is made of several components:
- server_id global parameter, only if set in config and different than 0 
(which is default value)
- timestamp when kamailio is started
- process id for each worker
- an incremented value for each sruid (or a random value each time, but 
this is not exported in config)

The collision across many instances even if server_id is not set is very 
unlikely. It would require that the instances are started at the same 
time and the task scheduler gives the same PID values for kamailio 
processes. But as said, if you have multiple instances, you can just set 
different server_id values.

Adding the alternative to use values generated by libuuid should not be 
that hard at all, for what I needed so far, $sruid was never colliding 
(and again, is very unlikely to happen anyhow).

Cheers,
Daniel

> -----Original Message-----
> From: sr-users-bounces at lists.sip-router.org 
> [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Alex Balashov
> Sent: Friday, August 9, 2013 11:32 AM
> To: Kamailio (SER) - Users Mailing List
> Subject: Re: [SR-Users] Generate UUID in Kamailio Script
>
> Oh, I thought you were looking for a dynamic GUID, not a constant UID 
> for an instance.
>
> Grant Bagdasarian <GB at cm.nl <mailto:GB at cm.nl>> wrote:
>
> >Nice!
>
> >
>
> >Thanks!
>
> >
>
> >-----Original Message-----
>
> >From: sr-users-bounces at lists.sip-router.org 
> <mailto:sr-users-bounces at lists.sip-router.org>
>
> >[mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of
>
> >Daniel-Constantin Mierla
>
> >Sent: Thursday, August 8, 2013 4:50 PM
>
> >To: Kamailio (SER) - Users Mailing List
>
> >Subject: Re: [SR-Users] Generate UUID in Kamailio Script
>
> >
>
> >Actually there is a variable giving an unique id for kamailio - just
>
> >load kex module and use $sruid to get the unique id (it will be a new
>
> >value for each use of it).
>
> >
>
> >If you have multiple instances of kamailio, then set server_id global
>
> >parameter to make the values unique across instances.
>
> >
>
> >Cheers,
>
> >Daniel
>
> >
>
> >
>
> >On 8/8/13 4:43 PM, Grant Bagdasarian wrote:
>
> >> That's too bad. Any idea if this already on the backlog for future
>
> >Kamailio versions?
>
> >>
>
> >> I guess the only option left is to use the EXEC module to run the
>
> >uuidgen command to get a new UUID?
>
> >>
>
> >> -----Original Message-----
>
> >> From: sr-users-bounces at lists.sip-router.org 
> <mailto:sr-users-bounces at lists.sip-router.org>
>
> >> [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Alex
>
> >> Balashov
>
> >> Sent: Thursday, August 8, 2013 3:36 PM
>
> >> To: sr-users at lists.sip-router.org 
> <mailto:sr-users at lists.sip-router.org>
>
> >> Subject: Re: [SR-Users] Generate UUID in Kamailio Script
>
> >>
>
> >> Unfortunately, there is no transformation or core function that emits
>
> >a GUID.
>
> >>
>
> >> There probably should be one.
>
> >>
>
> >> On 08/08/2013 09:33 AM, Grant Bagdasarian wrote:
>
> >>
>
> >>> Hello,
>
> >>>
>
> >>> Is it possible to generate a UUID inside the kamailio script? Is
>
> >>> there a module available which does this already or do I need to
>
> >call
>
> >>> something external from the script?
>
> >>>
>
> >>> Regards,
>
> >>>
>
> >>> Grant
>
> >>>
>
> >>>
>
> >>>
>
> >>> _______________________________________________
>
> >>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>
> >>> list sr-users at lists.sip-router.org 
> <mailto:sr-users at lists.sip-router.org>
>
> >>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
> >>>
>
> >>
>
> >> --
>
> >> Alex Balashov - Principal
>
> >> Evariste Systems LLC
>
> >> 235 E Ponce de Leon Ave
>
> >> Suite 106
>
> >> Decatur, GA 30030
>
> >> United States
>
> >> Tel: +1-678-954-0670
>
> >> Web: http://www.evaristesys.com/, http://www.alexbalashov.com/
>
> >>
>
> >> _______________________________________________
>
> >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>
> >> list sr-users at lists.sip-router.org 
> <mailto:sr-users at 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 at lists.sip-router.org 
> <mailto:sr-users at lists.sip-router.org>
>
> >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
> >
>
> >--
>
> >Daniel-Constantin Mierla - http://www.asipto.com
>
> >http://twitter.com/#!/miconda <http://twitter.com/#%21/miconda> - 
> http://www.linkedin.com/in/miconda
>
> >
>
> >
>
> >_______________________________________________
>
> >SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>
> >sr-users at lists.sip-router.org <mailto:sr-users at 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 at lists.sip-router.org <mailto:sr-users at lists.sip-router.org>
>
> >http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
> --
>
> Sent from my mobile, and thus lacking in the refinement one might 
> expect from a fully fledged keyboard.
>
> Alex Balashov - Principal
>
> Evariste Systems LLC
>
> 235 E Ponce de Leon Ave
>
> Suite 106
>
> Decatur, GA 30030
>
> United States
>
> Tel: +1-678-954-0670
>
> Web: http://www.evaristesys.com/, http://www.alexbalashov.com
>
> _______________________________________________
>
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing 
> list sr-users at lists.sip-router.org 
> <mailto:sr-users at 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 at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

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