[OpenSIPS-Users] How to invok lookup() and get attr from the caller, without side effects?

Rodrigo Pimenta Carvalho pimenta at inatel.br
Mon Jun 20 20:02:44 CEST 2016


Dear OpenSIPS-users,


The table location has the column attr where I use to store specific additional information for each registration.

Whenever A calls B, I have to read this specific information from the A record and from the B record. That is, I need to get and handle specific information about the caller and callee.


For the callee, I use to invoke the lookup("location") function that put the needed information in the attr_avp. That is good and works very well. Then, I just have to read the attr_avp to get such specific information.


For the caller, I use to invoke:


$var(aorChamador) = $(ct.fields(uri));

lookup("location","","$var(aorChamador)");


However it causes amazing side effect in the SIP signaling. Ex: When A calls B, B stays quiet and A rings. So A can answer A. Crazy!

According to the documentation, lookup will overwritten the Request-URI. I guess that is why the SIP signaling become incoherent.


How could I get the caller attr specific information without side effects?


Any hint will be very helpful!!


Best regards.


RODRIGO PIMENTA CARVALHO
Inatel Competence Center
Software
Ph: +55 35 3471 9200 RAMAL 979
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