ion in the DTLS handshake to be learned by an attacker. This is due to the historical design of <a href="../man3/BIO_s_datagram.html">BIO_s_datagram(3)</a>; see <a href="../man3/BIO_s_datagram.html">BIO_s_datagram(3)</a> for details on this issue.</p>

<p>Once a socket has been connected, <a href="../man3/BIO_ctrl_set_connected.html">BIO_ctrl_set_connected(3)</a> should be used to inform the BIO that the socket is to be used in connected mode.</p>

<p>Prior to calling DTLSv1_listen() user code must ensure t