Maxim,
Could you please clarify the following
Yes, for the module, so that the module can defer some actions for
the later time. In my case I need to apply some transformations before the message gets reassembled for the delivery.
1) The callback function that you plan on adding - Will the function be modifying any attributes in the SDP ? Will it be recording any of the SDP attributes for future use ?
2) Once you have implemented this callback mechanism in Kamailio, will you be doing something similar for rtpproxy. Callback functions registered at appropriate points could be used for encryption/decryption or transcoding.
Thanks and Regards, Vikram.