TURN TURN Peer Peer client server A B |-- Allocate request --------------->| | | | (invalid or missing credentials) | | | | | | | |<--------------- Allocate failure --| | | | (401 Unauthenticated) | | | | | | | |-- Allocate request --------------->| | | | (valid credentials) | | | | | | | |<---------- Allocate success resp --| | | | (192.0.2.15:50000) | | | // // // // | | | | |-- Refresh request ---------------->| | | | | | | |<----------- Refresh success resp --| | | | | | |