Re: [PATCH v2 1/5] doc/adapter-api: Add Discoverable option to SetDiscoveryFilter

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Marcel,

On Mon, Jul 30, 2018 at 2:09 PM, Marcel Holtmann <marcel@xxxxxxxxxxxx> wrote:
> Hi Luiz,
>
>> This enables the client to set its discoverable setting while
>> discovering which is very typical situation as usually the setings
>> application would allow incoming pairing request while scanning, so
>> this would reduce the number of calls setting Discoverable and
>> DiscoverableTimeout and restoring after done with discovery.
>> ---
>> doc/adapter-api.txt | 6 ++++++
>> 1 file changed, 6 insertions(+)
>>
>> diff --git a/doc/adapter-api.txt b/doc/adapter-api.txt
>> index d14d0ca50..4791af2c7 100644
>> --- a/doc/adapter-api.txt
>> +++ b/doc/adapter-api.txt
>> @@ -113,6 +113,12 @@ Methods          void StartDiscovery()
>>                               generated for either ManufacturerData and
>>                               ServiceData everytime they are discovered.
>>
>> +                     bool Discoverable (Default: false)
>> +
>> +                             Make adapter discoverable while discovering,
>> +                             if the adapter is already discoverable this
>> +                             setting this filter won't do anything.
>> +
>>                       When discovery filter is set, Device objects will be
>>                       created as new devices with matching criteria are
>>                       discovered regardless of they are connectable or
>
> I am now regretting that we didn’t add a uint32 Flags parameter to Start Service Discovery mgmt command if this is something that is often done. Letting the kernel coordinate this properly for the lifetime of the discovery would be best. Otherwise things start to get racy eventually. Meaning that when implementing this in bluetoothd, we need to be careful to handle other mgmt commands correctly that might be issued from non-bluetoothd applications.

Yep, though StartDiscovery does continuous discovery while the mgmt
don't have that so I suppose if we do want to extend the mgmt
interface to add such flags we could perhaps add a flag to do it
continuously otherwise we would be toggling the setting on every
discovery window which is imo not very nice. Also should this perhaps
be extended to support add advertising into the picture, I guess it
should since discovery filters are for both LE and BR/EDR.

We anyway need a new command for extended scanning so we can have a
PHY filter, or we do intended to have the PHY as address_type? I guess
not so that means we could adds this sort of filter when do add PHY
filtering, though we still need to support old kernels so Im afraid we
will have do something in bluetoothd no matter what.

> Regards
>
> Marcel
>



-- 
Luiz Augusto von Dentz
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Bluez Devel]     [Linux Wireless Networking]     [Linux Wireless Personal Area Networking]     [Linux ATH6KL]     [Linux USB Devel]     [Linux Media Drivers]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Big List of Linux Books]

  Powered by Linux