netdev - Re: [Bluez-devel] forcing SCO connection patch

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Message-Id: <5D9353FF-6A69-4039-9033-C0EBD1CDA756@holtmann.org>
Date:	Wed, 27 Feb 2008 16:21:14 +0100
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Louis JANG <louis@...i.com>
Cc:	Dave Young <hidave.darkstar@...il.com>,
	linux-bluetooth@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	bmidgley@...il.com, David Miller <davem@...emloft.net>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [Bluez-devel] forcing SCO connection patch

Hi Louis,

> When bluez tried to connect SCO channel with  
> HCI_OP_SETUP_SYNC_CONN(ESCO_LINK),
> a real connection may be connected with SCO_LINK instead of  
> ESCO_LINK when
> peer device doesn't support eSCO.  however bluez try to find  
> connection handle
> by event's link type(SCO_LINK in above case) and the valid  
> connection handle
> for this event is waiting for ESCO_LINK. so bluez can't find  
> connection handle
> and discarded the event.

using HCI_OP_SETUP_SYNC_CONN doesn't mean eSCO. It is perfectly fine  
to request SCO links via that command. The difference here is  
Bluetooth 1.1 or 1.2 and later.

> This patch is to handle different type of synchronous link is  
> estabilished
> with its request.
>
> If bluez can't find connection handle, it try to find with different
> link type again. (For the above case, if bluez can't find connection
> handle with SCO_LINK, it try to find connection handle with  
> ESCO_LINK again.)
> and update link type of this connection handle with event's link type.

Inside the kernel it is not called BlueZ :) It simply is the Bluetooth  
subsystem and in case the HCI core.

Regards

Marcel

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