f="group__tcp__raw.html#ga87093e137fcc53ea82a134a3f5b33623">tcp_close()</a> to send a segment including FIN flag but not data. This FIN may be added to an existing segment or a new, otherwise empty segment is enqueued.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">pcb</td><td>the <a class="el" href="structtcp__pcb.html">tcp_pcb</a> over which to send a segment </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>ERR_OK if 