[SR-Users] run some extra things before relying message

[Mojtaba]

Hello,
I have encountered with problem in Kamailio.
At first glance it looks simple. Considering the Data Lump feature in
Kamailio, All changes in SIP body, does not apply quickly.
So if we are using RTPEngine or RTPProxy, How we can get body message
(Actually IP and port from SDP after rtpengine_manage function) before
relaying message?
Suppose i want get some information and run some extra things before
relying message?
I just added my extra things in t_on_reply  block, but it's strange
why it doesn't work before relaying!

-Mojtaba Esfandiari.S