Access to TURN channel ID
I am implementing an FPGA/ARM based media streaming system. I am trying to use libnice to find connection routes, and if necessary establish a TURN-connection. But instead of using the sockets / methods that libnice provides for data transmission, I want to use the FPGA (between ETH PHY and ARM) for actual data transfer. I got all that running, libnice is negotiating a connection between two devices. My problem is now: how can I access information (especially TURN Channel ID) from libnice from the udp-turn socket to craft packets in the FPGA? I am unable to find something in the documentation. Is it even possible?