Hi Shane,

dialog_ng started as a prototype by us quite a while ago to form the basis of dialogs in our IMS implementation using Kamailio. We took quite a lot from the existing dialog module at the time and then built the additional functionality on top. There were some things (like dlg_manage) that we did not move across.... and this is bad.... so I apologise.

Right now to get a dialog recorded you need to define a flag in the modparam:

modparam("dialog_ng", "dlg_flag", 10)

And then when you want to track a dlg do something like:

if (is_method("INVITE")) {

   setflag(10);

   ...

}

We have had a lot of other work to focus on and haven't spent too much time on dialog_ng but we will certainly put some effort into making it easier to use and more complete. 

Cheers

Jason

On Thu, Feb 5, 2015 at 8:03 PM, Shane Harrison <Shane.Harrison@imgtec.com> wrote:

Thanks Daniel - that clarity helps.  Apologies if I should have been able to glean that from the docs - I just didn't see it in my reading.  FYI, dialog-ng has deprecated the dlg_mange() function.

Can anybody who has used or involved in writing the dialog-ng module shed some light on what the new mechanism is for creating an early dialog structure?

Cheers and thanks
Shane

________________________________________
From: sr-users [sr-users-bounces@lists.sip-router.org] on behalf of Daniel-Constantin Mierla [miconda@gmail.com]
Sent: 06 February 2015 00:02
To: Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] Using dialog_ng

Hello,

I haven't used the dialog_ng module, but (as expected based on the
dialog module) if you only set the FLT_DIALOG flag, then the dialog is
created when calling t_relay(). The dialog module has dlg_manage()
function which creates the dialog immediately, maybe that's in dialog_ng
as well.

Cheers,
Daniel

On 04/02/15 05:28, Shane Harrison wrote:
> Hi all,
>
> I think the lack of response to my previous thread is probably because it was too complicated.  I have now narrowed my problem down after further archive readings .
>
> I am trying to use the dialog_ng module along with the ims_charging_module.  Upon reception of an INVITE, a call to the Ro_CCR() from the request_route script is made.  That function does a check that the dialog record exists (binds to dialog module and does a "get_dlg(msg)" call) - this fails i.e. dialog is not found.
>
> Running kamailio 4.2.2 and relevant sections of kamailio.cfg are:
> modparam("dialog_ng", "dlg_flag", FLT_DIALOG)
> modparam("dialog_ng", "timeout_avp", "$avp(DLG_TIMEOUT_AVP)")
> modparam("dialog_ng", "detect_spirals", 1)
> modparam("dialog_ng", "profiles_no_value", "orig ; term")
>
> request_route {
>         # NAT detection
>         route(NATDETECT);
>
>         # Set DLG flag to track dialogs using dialog2
>         if (!is_method("REGISTER|SUBSCRIBE"))
>                 setflag(FLT_DIALOG);
>
>         # handle requests within SIP dialogs
>         route(WITHINDLG);
>
>         ### only initial requests (no To tag)
>
>         # CANCEL processing
>         if (is_method("CANCEL"))
>         {
>                 if (t_check_trans())
>                         t_relay();
>                 exit;
>         }
>
>         t_check_trans();
>
>         if (is_method("INVITE"))
>         {
>                 set_dlg_profile("orig");
>                Ro_CCR("CHARGING_CCR_REPLY", "orig", "SCUR", "", "30","CCR_location");
>        }
>
>
> So my question is, "should the above logic create a dialog record on the initial INVITE?" and if yes then "what possible reasons might there be for the Ro_CCR() function not be able to detect it exists?"
>
> Cheers
> Shane Harrison
>
>
>
>
> _______________________________________________
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--
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


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Smile Communications Pty (Ltd)

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