[OpenSIPS-Users] Matching dialog IDs

Răzvan Crainea razvan at opensips.org
Fri Apr 9 08:01:08 EST 2021

Hi, Kingsley!

I am afraid your approach is the correct one, and currently there's no 
other workaround, rather than the one you already did :(.
Last year I've reworked the did and dlg_id in a few places to have a 
more consistent value, but somehow I missed the event's one. Ideally, we 
should have only two formats: the hex one (the one in Record-Route, 
dlg_list and $DLG_did), and the db_id one (the integer in DB).
I will try to rework this in the master branch, any chance you could 
open a feature request for it?

Best regards,

Răzvan Crainea
OpenSIPS Core Developer

On 4/9/21 2:04 AM, Kingsley Tart wrote:
> Hi,
> With OpenSIPS 3.1, on one example call I noted that:
>   * did in Record-Route header was 5af.b5c82a2
>   * dlg_id in DB table was 17201388227675
>   * event_route[E_DLG_STATE_CHANGED] got hash_entry=4005 (param 1) and
>     hash_id=44207195 (param 2)
> I see these 3 sets of values are all essentially the same thing but in
> a different format.
> In a way it feels wrong to ask this but, is this guaranteed behaviour?
> eg in the event route, this expression:
> 	$(param(1){s.dec2hex}{s.reverse}{s.tolower}) + "." +
> $(param(2){s.dec2hex}{s.reverse}{s.tolower});
> evaluates to "5af.b5c82a2", ie the did in the Record-Route header, and
> that in MySQL I could derive the dlg_id value in the DB table (which
> was 17201388227675) by doing XXXX*POW(2,32)+YYYYYYY where XXXX is the
> value of $param(1) and YYYYYYY is the value of $param(2).
> There may be a better way to do all this, but I'm trying to figure out
> ways I can update the DB with some additional info at BYE time and
> haven't currently found out how to do this more properly.
> (again, this feels the wrong way to do it, but I have not yet found a
> better way).
> Cheers,
> Kingsley.
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