ssl_enabled_tls_version_range
int ssl_enabled_tls_version_range(SSL *s, uint16_t *min_ver, uint16_t *max_ver);
if (!ssl_enabled_tls_version_range(s, &min_version, &max_version))
if (ssl_enabled_tls_version_range(ssl, &minver, &maxver) != 1) {