To: bluez-users@lists.sourceforge.net
Subject: Re: [Bluez-users] HCI_switch_role 
In-reply-to: ""Thor Egil Skaug""'s message of "Wed, 03 Mar 2004 18:59:51 PST."
             <000501c40194$c308add0$9349edc7@thores>
Message-ID: <7130.1078397385@csr.com>
From: Peter Stephenson <pws@csr.com>
Sender: bluez-users-admin@lists.sourceforge.net
Errors-To: bluez-users-admin@lists.sourceforge.net
Date: Thu, 04 Mar 2004 10:49:45 +0000

"Thor Egil Skaug" wrote:
> Does anyone know why the HCI_switch_role command takes a BDADDR argument
> instead of
> a connectionhandle?

It's not clear to me, either, but it may be for compatibility with the
role-change event when generated during connection creation: in that
case, the connection_complete event hasn't come up yet, so there's no
valid ACL handle.  Hence it has to report the BD ADDR (as with
the connection_request event).

> The role_change event should be sent from both devices to their
> respective sw stacks after this.
> 
> I don't understand the following from the BT specification:
> 
> 1. Is the BDADDR the address of the remote device, or the local device
> (to the caller)?

The remote device.

> 2. In the returned event, what bdaddr is returned to the
> (HCI_switch_role) calling stack, and what bdaddr
>    is returned to the stack on the remote device?

Each side reports the remote address (where it reports anything).

> 3. What if there is more than one connection between two devices?

There can't be, you can only have one ACL between any two devices.
This a specific error code acl_connection_already_exists or something
similar if you try and add another one.

pws


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