lock.html">ossl-guide-tls-client-non-block(7)</a>) then you should note that there is an important difference here between the way a QUIC application and a TLS application works. With a TLS application if we try to read or write something to the <b>SSL</b> object and we get a &quot;retry&quot; response (<b>SSL_ERROR_WANT_READ</b> or <b>SSL_ERROR_WANT_WRITE</b>) then we can assume that is because OpenSSL attempted to read or write to the underlying socket and the socket signalled the &quot;retry&quot;. With 