Cockhootec Yahrabee cockootec@gmail.com:
I have function where I cast `sip_msg`'s `body` to `sdp_info` structure and within this function I am changing some fields in `sessions` and `streams` list.
I am able to see changes when I am printing them after message leaves the function but Kamailio sends the original message not the changed one. Do I need somehow let the Kamailio know that the message was changed and it should rebuild `buf` field? Or I need to change directly `buf` field within `sip_msg`?
You need to handle message modifications as data lumps. Have a look at Kamailio development guide: http://www.asipto.com/pub/kamailio-devel-guide/#c14datalump
Also, look if you can extend sdpops module instead of baking new one: http://kamailio.org/docs/modules/devel/modules/sdpops.html
Hope this helps :)