2.1.1.1.1.1 Receivers

Receivers MUST transmit ssdp:alive messages, according to the rules specified in the UPnP Device Architecture specification [UPNPARCH1.1].

Receivers MUST respond to the change in the AuthorizationGrantedUpdateID state variable in the X_MS_MediaReceiverRegistrar:1 UPnP service (see section 3.4) by invoking the IsAuthorized action to determine whether it is the receiver that was authorized.

The IsAuthorized action has two arguments: DeviceID and Result.

The DeviceID argument is sent to the transmitter for verification and the transmitter sends the Result argument back to the receiver.

The Result argument is an integer. Its value is set to 1 if the device is currently authorized and to 0 if the device is not authorized.