(PECL gupnp >= 0.1.0)
gupnp_root_device_get_available — Check whether root device is available
$root_device
Get whether or not root_device is available (announcing its presence).
root_device
A root device identifier, returned by gupnp_root_device_new().
성공 시 TRUE를, 실패 시 FALSE를 반환합니다.
TRUE
FALSE