[avahi] Re: Some notes on designing the Avahi DBUS API

[Sebastien Estienne]

2005/6/25, Lennart Poettering <mzzhgg at 0pointer.de>:
> On Sat, 25.06.05 16:42, Trent Lloyd (lathiat at bur.st) wrote:
> 
> > > avahi-discover using core.h, the link between avahi-daemon and
> > > avahi-discover was the unix socket, and that the simple protocol was
> > > used there
> > > And that dbus could replace this unix socket.
> > > But it seems, i was wrong :)
> > >
> > > How does dbus integrate with avahi-daemon, will it be implemented on
> > > top of core:h (linking to avahi-core)? or is it directly built in
> > > avahi-daemon like it seems when reading dbus-protocol.c.
> >
> > Right, basically you are confused :)
> >
> > avahi-core (the API used by avahi-discover) is the 'core' of avahi, its
> > the mdns engine, this API can be used to write a daemon for speaking
> > dbus, or for embedded applications, etc.
> >
> > the 'simple protocol' is a very simple communication overa unix socket
> > to the avahi-daemon (already implemented) that allows for resolving
> > hostnames, ip reverses and search for dns servers.
> >
> > This is used for use with libnss-mdns, which is a system library, needs
> > to be fast with no deps and hence not using dbus.
> >
> > avahi-daemon will implement a d-bus interface to this engine, as well as
> > the existing socket protocol, and maybe some other stuff in future.
> >
> > People should almost never be using 'avahi-core' directly, unless
> > writing an embedded app or the daemon -- in your case writing a test
> > mdnsbrowse/publish with the API would be usefull, because you plan to
> > help me write the dbus daemon, which would involve using that API
> > directly (unlike most people, who would use the dbus api).
> >
> > Hope that clears things up. :)
> 
> I made a little drawing with dia which might help you to understand
> how the modules currently play together:
> 
> http://freedesktop.org/~lennart/overview.png
> 
> > PS: lennart: Why are we not using the mailing list for this?
> 
> Good question. Let's move it there. I'll CC this mail there. Perhaps
> we should bounce the previous traffic on this thread there too?
Yes i think we should because your mails contain valuable informations.
Lennart, you take care of it?

> 
> Lennart
> --
> name { Lennart Poettering } loc { Hamburg - Germany }
> mail { mzft (at) 0pointer (dot) de } gpg { 1A015CC4 }
> www { http://0pointer.de/lennart/ } icq# { 11060553 }
> 


-- 
Sebastien Estienne