TURN                                 TURN          Peer         Peer
client                               server         A            B
  |--- Send indication --------------->|            |            |
  |    Transaction-Id=0x1278E9ACA2711637EF7D3328    |            |
  |    XOR-PEER-ADDRESS=192.0.2.150:32102           |            |
  |    DONT-FRAGMENT                   |            |            |
  |    DATA=...                        |            |            |
  |                                    |- UDP dgm ->|            |
  |                                    | data=...   |            |
  |                                    |            |            |
  |                                    |<- UDP dgm -|            |
  |                                    |  data=...  |            |
  |<-- Data indication ----------------|            |            |
  |    Transaction-Id=0x8231AE8F9242DA9FF287FEFF    |            |
  |    XOR-PEER-ADDRESS=192.0.2.150:32102           |            |
  |    DATA=...                        |            |            |