Cockhootec Yahrabee cockootec@gmail.com:
Also it is even possible to add SDP attribute by adding new data_lump? Isn't data_lumps dedicated to manage SIP message headers?
Lumps work also for message bodies.
Have a look at modules/nathelper/nathelper.c -> fix_nated_sdp_f() There is example of insert_new_lump_after() where stuff is added to body.
I have not personally written code that adds lumps to messages, but removing from body works perfectly with data lumps i.e. sdpops/sdp_remove_line_by_prefix().
I just need a solid answer for question: "Is the adding attribute to SDP body implemented in Kamailio? If yes where can I find it and how can I use it?"
In core there seem to be only SDP attribute get functions (/parser/sdp). Examples of body modification can be found from different modules (sdpops, nathelper, rtpengine, mangler).
If it is not implemented yet how can I contribute? It is easy as modifying `buf` of `sip_msg`?
I think core committers can comment more on this, but in my view contributions to sdpops -module would be great. For script writer or C module functions.