Re: [Bluez-devel] Meaning of hcitool -i dev con

[Marcel Holtmann <marcel@holtmann.org>]

Hi,

> > > 	> SCO 00:19:2C:D5:90:DF handle 2 state 1 lm SLAVE
> > > 	< ACL 00:19:2C:D5:90:DF handle 1 state 1 lm MASTER ENCRYPT
> > > 
> > > Does this mean that the USB adapter is playing TWO roles (master and
> > > slave) at the same moment??
> > 
> > that is for the SCO connection. The ACL connection is the one that
> > counts. The SCO depends on the ACL connection.
> > 
> > Actually the the SCO/eSCO connections don't have a link mode. It is an
> > issue how these information are presented.
> >
> Thank you for the explanation.
> This explains the output from hci command and hcidump.
> Your words also reminds me that standard has said "before creating SCO, a ACL
> link must exist".
> But I am still confused about the handle.
> If ACL first use handle 0, does that mean the upcoming SCO will use handle 0? 
> Or another one?

the handle 0 is invalid first of all. The ACL link gets a handle and the
SCO link gets its own handle. Like you see it in the example above.

Regards

Marcel



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