_ERROR_INTERFACE_UNAVAILABLE:     log_error("cannot create GDHCP client: interface %s unavailable",        arg_netdev);     break;    case G_DHCP_CLIENT_ERROR_INTERFACE_IN_USE:     log_error("cannot create GDHCP client: interface %s in use",        arg_netdev);     break;    case G_DHCP_CLIENT_ERROR_INTERFACE_DOWN:     log_error("cannot create GDHCP client: interface %s down",        arg_netdev);     break;    case G_DHCP_CLIENT_ERROR_NOMEM:     r = log_ENOMEM();     break;    case G_DHCP_CLIENT_ERROR_INVALID_INDEX:     log_error("cannot create GDHCP client: invalid interface %s",        arg_netdev);     break;    case G_DHCP_CLIENT_ERROR_INVALID_OPTION:     log_error("cannot create GDHCP client: invalid 