/p>

<p>For DTLSv1_listen(), prior to OpenSSL 1.1.0, fatal and non-fatal errors both produce return codes &lt;= 0 (in typical implementations user code treats all errors as non-fatal), whilst return codes &gt;0 indicate success.</p>

<h1 id="SEE-ALSO">SEE ALSO</h1>

<p><a href="../man3/SSL_CTX_set_cookie_generate_cb.html">SSL_CTX_set_cookie_generate_cb(3)</a>, <a href="../man3/SSL_CTX_set_cookie_verify_cb.html">SSL_CTX_set_cookie_verify_cb(3)</a>, <a href="../man3/SSL_CTX_set_stateless_cookie_generate_cb.ht