dnsgrab

type Cache interface {
	NameByIP(ip []byte) (name string, found bool)

	IPByName(name string) (ip []byte, found bool)

	Add(name string, ip []byte)

	MarkFresh(name string, ip []byte)

	NextSequence() uint32
}

type Server interface {
	// LocalAddr() returns the address at which this server is listening
	LocalAddr() net.Addr

	// Serve() runs the server (blocks until server ends)
	Serve() error

	// Close closes the server's network listener.
	Close() error

	// ProcessQuery processes a DNS query and returns the response bytes, the number of answers in the response, and any error encountered while
	// processing the query.
	ProcessQuery(b []byte) ([]byte, int, error)

	// ReverseLookup resolves the given fake IP address into the original hostname. If the given IP is not a fake IP,
	// this simply returns the provided IP in string form. If the IP is not found, this returns false.
	ReverseLookup(ip net.IP) (string, bool)
}