[Markus Schaber] > A simple "check for update" could be done sending a single UDP packet > containg a list of keys (package names, uuids or similar), and the > reply is another UDP packet containing the available versions.
This sort of thing is, in fact, often done in DNS. (A "single UDP packet", indeed, with an already deployed global caching scheme with a configurable lifetime.) SpamAssassin rule updates, for instance. Peter
