s="line">    } <span class="keywordflow">else</span> {</div><div class="line">        topic = <span class="stringliteral">&quot;datetime&quot;</span>;</div><div class="line">    }</div><div class="line"></div><div class="line">    <span class="comment">/* open the non-blocking TCP socket (connecting to the broker) */</span></div><div class="line">    open_nb_socket(&amp;sockfd, &amp;ssl_ctx, addr, port, ca_file, NULL);</div><div class="line"></div><div class="line">    <span class="keywordflow">if</span> (s