just did some spec reading, it's quite clear and nit. I can understand that put UDP payload into a single HTTP stream, at least when QUIC transport is in use,

just did some spec reading, it's quite clear and nit. I can understand that put UDP payload into a single HTTP stream, at least when QUIC transport is in use, there is no UDP in TCP case. The Source Address/Port in the UDP payload message serve as key to handle to the tunnel client if I understand correctly?