title: Looking for DTLS non-blocking program example (C/C++)
body: <p>I am learning to use SSL &amp; UDP. After some extensive search, I couldn't find many sample programs to test and study. In fact, the only one I found is this. </p>
  
  <p><a href="http://openssl.6102.n7.nabble.com/DTLS-examples-td2143.html" rel="noreferrer">http://openssl.6102.n7.nabble.com/DTLS-examples-td2143.html</a> </p>
  
  <p>However, although the author claimed it is non-blocking, after reading the code I don't think it is what we usually mean because it does not use select() or poll() at all. Would like to have some help here, really appreciated.</p>