[SR-Users] how to call loose_route() after adding route header without using msg_apply_changes?

Hi List

To handle CPE which can only handle a limited number of route header (PacketCable SIP specification), I need to store and restore the route header (limited topology hiding only affecting Route Header) to present the CPE only one Route or RR header.

I pass the ID of the stored route-set via RR param.

So when I get a message back from the CPE is:

* Take ID from RR param and pull stored route set from cache. * remove_hf("Route"); * insert_hf("Route: $avp(stored-routeset)\r\n"); * msg_apply_changes(); * loose_route();

I found loose_route() only to be able to correctly determine the next hop, if I first did apply the changes.

But after adding rtpengine to the mix, I got back into the known situation that calling rtpengine (on the branch route) after calling msg_apply_changes() results in duplicate SDP.

Is there a way to get loose_route() to operate on freshly added header without calling msg_apply_changes?