[Question] How do you specify transport for TURN server?

[redbaron4]

We are trying to use a TURN server with out Linphone client on Windows & it seems only UDP can be used there. We use coturn as TURN server and it supports TCP, UDP or TLS. If we turn off UDP in coturn config, Linphone does not receive any response for allocate requests & assumes turn server is unreachable.

We have tried setting the turn server to xx.xx.xx.xx:yyyy?transport=tcp but it does not change the behavior. Does linphone support STUN over TCP or TLS.

For TLS will root CA specified in [sip] also be used for certificate validation of TURN server or can we turn the validation off for TURN server only?