TCP support for TURN (relay)

[ris-work]

TCP relay support is sometimes the only thing that can bypass certain firewalls. When I configured coturn to be a TCP-only relay, candidate is not acquired or not used, suggesting the absence of this feature. TCP is less attractive for RTC but it is okay if the throughput is somewhat maintained rather than no connectivity at all.

Thank you.

- Rishikeshan

[infiniwave]

Indeed.
could not get server reflexive address udp4 turn:turn.anyfirewall.com:443?transport=tcp: deadline has elapsed
Attempting a TCP TURN server fails with an attempt at connecting using UDP.