Re: [Bluez-devel] [PATCH] dbus.c: cleanup/fix method parameter getting

[Johan Hedberg <johan.hedberg@nokia.com>]

Hi Marcel,

On Mon, Nov 07, 2005, Marcel Holtmann wrote:
> > > Every time that a client establish a connection with the d-bus daemon
> > > the connection id changes.  Therefore control client id is useful only
> > > for clients that is always connected with the daemon.
> > 
> > True, and that was also one thing I was worried about when it comes to
> > the practicality of that solution (the settings wouldn't be persistent
> > enough). So, I think using the user id might be better in this respect.
> 
> I don't think so, because this options might be used not very often and
> so having them per unix user doesn't help. Two different applications
> running as them same user might have different needs. One wants to do
> inquiry with another IAC, the other with the general IAC. This tends to
> be a race condition.

Ok, I see your point. I didn't quite understand the use-case you were
thinking of earlier. One extra requirement that the dbus-id settings has
is that we will have to monitor the lifetime of a D-BUS client (by
listening NameOwnerChanged D-BUS signals) and remove the corresponding
entry from the settings table when an id gets removed from the bus.

> > However, let me now introduce a third option which we just discussed on
> > IRC with Claudio: optional D-BUS method parameters. It would be quite
> > easy to implement the methods so that the client could leave out most
> > parameters in which case hcid (or bluetoothd) would use some set of
> > default values. You could e.g. call the Inquiry method without any
> > parameters and it would just work (kind of the same way that dbus-test
> > allows doing "./dbus-test Inquiry" in which case it uses length=10 &
> > num_resp=100 as the default values). If the client insists on using its
> > own values for the method it would simply include them in the method
> > call.
> 
> Let's do this proposal first.

Ok, I'll begin by doing a patch for Inquiry and PeriodicInquiry
(probably during tomorrow).

Johan


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