ControlLCPExtension
bool ControlLCPExtension(ppp_simple_handler_info_t *info, uint32 LCPExtensionindex, uint32 LCPExtensionOP) const;
if (interface.ControlLCPExtension(&info, 1, PPPC_GET_SIMPLE_HANDLER_INFO) != true) {
if (interface.ControlLCPExtension(&info, 1, PPPC_ENABLE) != true) {