int wps_is_selected_pin_registrar(const struct wpabuf *msg)
{
    struct wps_parse_attr attr;

    /*
     * In theory, this could also verify that attr.sel_reg_config_methods
     * includes WPS_CONFIG_LABEL, WPS_CONFIG_DISPLAY, or WPS_CONFIG_KEYPAD,
     * but some deployed AP implementations do not set Selected Registrar
     * Config Methods attribute properly, so it is safer to just use
     * Device Password ID here.
     */

    if (wps_parse_msg(msg, &attr) < 0)
        return 0;

    if (!attr.selected_registrar || *attr.selected_registrar == 0)
        return 0;

    if (attr.dev_password_id != NULL &&
        WPA_GET_BE16(attr.dev_password_id) == DEV_PW_PUSHBUTTON)
        return 0;

    return 1;
}