TURN                                TURN           Peer          Peer
client                              server          A             B
  |                                   |             |             |
  |-- CreatePermission req (Peer A) ->|             |             |
  |<- CreatePermission success resp --|             |             |
  |                                   |             |             |
  |--- Send ind (Peer A)------------->|             |             |
  |                                   |=== data ===>|             |
  |                                   |             |             |
  |                                   |<== data ====|             |
  |<------------- Data ind (Peer A) --|             |             |
  |                                   |             |             |
  |                                   |             |             |
  |--- Send ind (Peer B)------------->|             |             |
  |                                   | dropped     |             |
  |                                   |             |             |
  |                                   |<== data ==================|
  |                           dropped |             |             |
  |                                   |             |             |