Re: [Bluez-devel] Host Controller to Host Flow Control

[Marcel Holtmann <marcel@holtmann.org>]

Hi Mayank,

> > I added the two missing decodings to hcidump now.
> 
> I see the following five missing decodings in hcidump. Which ones did you
> miss out?
> 
> (1)< HCI Command: Host Buffer Size (0x03|0x0033) plen 7
>    0000: 00 04 ff 08 00 08 00                              .......
> 
> (2) > HCI Event: Command Complete (0x0e) plen 4
>     Host Buffer Size (0x03|0x0033) ncmd 1
>     0000: 00                                                .
> 
> (3) < HCI Command: Set Host Controller To Host Flow Control (0x03|0x0031)
> plen 1
>     0000: 01                                                .
> 
> (4) > HCI Event: Command Complete (0x0e) plen 4
>     Set Host Controller To Host Flow Control (0x03|0x0031) ncmd 1
>     0000: 00                                                .
> 
> (5) < HCI Command: Host Number of Completed Packets (0x03|0x0035) plen 5
>   0000: 01 28 00 01 00                                    .(...

the code in the CVS should now take care of all five.

> > You have to
> > store the setting for host_fc in hci_dev, because it can be different
> > for separate controllers.
> 
> I agree. But how to provide the user with the facility to switch flow
> control on/off? Like we modify security settings through hcid.conf.

As I said, the kernel can track HCI command and their results. So you
can actually detect inside the kernel if someone switched it on. See the
page and inquiry scan for an example.

After that you can simply add an additional command to hciconfig to set
the host flow control and everything is fine.

Regards

Marcel



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