Dtls12Client.this

this

(DtlsTransport transport,  DtlsTimerSink timer,
          DatagramEndpoint serverAddr,  string serverName)

Constructs a DTLS 1.2 client handshake engine.

`transport`	The datagram transport for sending/receiving.
`timer`	Timer sink for retransmission scheduling.
`serverAddr`	The server's address.
`serverName`	The SNI hostname.