[sr-dev] Fwd: module writing & per message variable within my module

jay binks jaybinks at gmail.com
Thu May 8 08:59:53 CEST 2014

So id love to read somewhere more about structures in kamailio at a high
is there a more interactive place to discuss these concepts ?? say IRC,
google hangouts or something ??
( without having to bug the whole list )

can you explain what the differences are when you say "avp stored in the
transaction" and process variables ?
do you literally mean variables in my module here, or are these some kind
of structure attached to the sip_msg ?

effectively what im looking to do is store some custom data
against sip_msg* that I can use later if I need to.

my reason for doing a module is that I had a few things I wanted to do in a
module ( looking up large data structures for performance reasons ), and im
implementing a few other bits of business logic in this module.

im happy to discuss further if you want to gtalk me ( on this email address


On 8 May 2014 16:52, Olle E. Johansson <oej at edvina.net> wrote:

> On 08 May 2014, at 08:49, jay binks <jaybinks at gmail.com> wrote:
> Sorry to repost this but, Im still looking for answers.
> is there a better place to be asking these questions ??
> Jay
> ---------- Forwarded message ----------
> From: jay binks <jaybinks at gmail.com>
> Date: 19 March 2014 19:18
> Subject: module writing & per message variable within my module
> To: sr-dev <sr-dev at lists.sip-router.org>
> So Im writing a custom module to implement some of our business logic,
> there are a few steps that im building into the module,  for example
> conform_callerid
> conform_destination
> what I want to achive should be fairly simple, but let me explain and im
> sure someone will tell me where to look.
> when I call conform_callerid, I want to store a few bits of info so
> Initially I store them in a global variable ( yup lazy & dangerous I guess )
> then I write the pv "get" function, to return the value from the global.
> this was only done as a quick proof of concept.
> but being global, im sure the variable will be overwritten by other
> message etc etc..
> so I effectively want to store some custom fields against the message.
> I didnt see this on the msg structure, but maybe I missed something
> or is there a better way to achieve this ??
> basically I want to be able to call conform_callerid
> then when I call conform_destination I want to look at some fields from
> the conform_callerid process  ( within the context of the message we are
> processing )
> any pointers would be appreciated.
> avps are stored in the transaction, process variablees in the process. You
> don't clearly say in which context you want to "save" the data and when you
> want to "use" it so it's hard to answer this.
> Why do you need to write a module for this? What is it you can not do in
> the scripts?
> /O
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