Locate the remote control application using Bonjour.
If required, use the pairing protocol to pair with the receiver.
Request details of the currently-airing programme via the remote control
application; this returns basic information relating to the current
service and broadcast, including the TVDNS or RadioDNS domain name for the
crid:// URI for the broadcast, and the scheduled
start time, where known.
Companion device queries for metadata exactly as the receiver would.