+ /* TLS1.3 app-controlled cookie generate callback */
+ int (*gen_stateless_cookie_cb) (SSL *ssl, unsigned char *cookie,
+ size_t *cookie_len);
+
+ /* TLS1.3 verify app-controlled cookie callback */
+ int (*verify_stateless_cookie_cb) (SSL *ssl, const unsigned char *cookie,
+ size_t cookie_len);
+