ifinder scans for mDNS/DNS-SD published services on the local network. It issues a mDNS PTR query to the special RR
_services._dns-sd._udp.local for retrieving a list of all currently registered
services on the local link. For the purpose of finding Apple devices, it also
issues PTR queries related to iDevice, such as _homekit._tcp, _apple-mobdev2._tcp.
If any service instance found, ifinder will try to resolve it.
ifinder doesn't support to publish services, it just sends queries to the
multicast addresses(both IPv4 and IPv6), then listens and parses the replies.
It does not rely on a local mDNS responder daemon, and can be used on Windows, Linux, OS X.