how to advertise a GATT service only for LE or BR/EDR?

how to advertise a GATT service only for LE or BR/EDR?

[Hermida, Isaac]

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Re: how to advertise a GATT service only for LE or BR/EDR?

[Luiz Augusto von Dentz]

Hi Isaac,

On Thu, Sep 28, 2017 at 7:43 PM, Hermida, Isaac <Isaac.Hermida@digi.com> wrote:
> Hi group,
>
> As part of the bluetooth SIG certification there are two test cases
> /TP/GAR/CL/BI-34-C and /TP/GAR/CL/BI-35-C (you can see they defined in
> unit/test-gatt.c).
> Currently I am able to run the "test/example-gatt-server" and see my
> custom services and characteristics, but I need to define an specific
> service/characteristic to be only accessible trough LE or BR/EDR
> transport parameter. I was digging into the code but I was unable to
> find how to set it for the GATT server.
>
> In other words, what I want to do is launch the gatt-server and then,
> when inspecting the services/characteristic with gatttool, the returned
> list should be different if I run gatttool with "-p 31" or not (notice
> how the gatttool prompt is set to LE or BR).
>
> # gatttool -I -b 00:40:9D:98:99:BD -p 0
> [00:40:9D:98:99:BD][LE]> connect
> Attempting to connect to 00:40:9D:98:99:BD
> Connection successful
> [00:40:9D:98:99:BD][LE]> primary
> attr handle: 0x0001, end grp handle: 0x0005 uuid:
> 00001800-0000-1000-8000-00805f9b34fb
> attr handle: 0x0006, end grp handle: 0x0009 uuid:
> 00001801-0000-1000-8000-00805f9b34fb
> attr handle: 0x000a, end grp handle: 0x000d uuid:
> 0000180f-0000-1000-8000-00805f9b34fb
> attr handle: 0x000e, end grp handle: 0x001d uuid:
> 12345678-1234-5678-1234-56789abcdef0
> attr handle: 0x001e, end grp handle: 0x0025 uuid:
> 0000180d-0000-1000-8000-00805f9b34fb
>
>
> # /tmp/gatttool -I -b 00:40:9D:98:99:BD -p 31
> [00:40:9D:98:99:BD][BR]> connect
> Attempting to connect to 00:40:9D:98:99:BD
> Connection successful
> [00:40:9D:98:99:BD][BR]> primary
> attr handle: 0x0001, end grp handle: 0x0005 uuid:
> 00001800-0000-1000-8000-00805f9b34fb
> attr handle: 0x0006, end grp handle: 0x0009 uuid:
> 00001801-0000-1000-8000-00805f9b34fb
> attr handle: 0x000a, end grp handle: 0x0019 uuid:
> 12345678-1234-5678-1234-56789abcdef0
> attr handle: 0x001a, end grp handle: 0x001d uuid:
> 0000180f-0000-1000-8000-00805f9b34fb
> attr handle: 0x001e, end grp handle: 0x0025 uuid:
> 0000180d-0000-1000-8000-00805f9b34fb
>
>
>
> I am using bluez 5.41. Is possible to advertise a service only for LE or
> BR? I guess it should because is part of the SIG certification and is
> part of the unit/test-gatt.

This might be because the spec was no clear about the database being
bearer specific, which in my opinion this is a oversight since then we
can't represent attributes of dual mode devices with a unified object,
and I really wonder if this has to be forced up into the API, if it
does then we would have to encode bearer information into the object
path (argh!) for client and for server would probably need a property
telling which bearer this would be available and encode this into to
the database which may leave gaps in the handles or just duplicate
everything, for server Id probably just hide the services based on the
bearer, but we still need to store the CCC configuration in a bearer
specific manner.

-- 
Luiz Augusto von Dentz

Re: how to advertise a GATT service only for LE or BR/EDR?

[Hermida, Isaac]

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Re: how to advertise a GATT service only for LE or BR/EDR?

[Hermida, Isaac]

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Re: how to advertise a GATT service only for LE or BR/EDR?

[Luiz Augusto von Dentz]

Hi Isaac,

On Mon, Oct 2, 2017 at 10:03 AM, Hermida, Isaac <Isaac.Hermida@digi.com> wrote:
> Hi Luiz et all,
>
> On 09/29/2017 08:44 AM, Hermida, Isaac wrote:
>> Hi Luiz,
>>
>> On 09/28/2017 08:21 PM, Luiz Augusto von Dentz wrote:
>>> Hi Isaac,
>>>
>>> On Thu, Sep 28, 2017 at 7:43 PM, Hermida, Isaac <Isaac.Hermida@digi.com> wrote:
>>>> Hi group,
>>>>
>>>> As part of the bluetooth SIG certification there are two test cases
>>>> /TP/GAR/CL/BI-34-C and /TP/GAR/CL/BI-35-C (you can see they defined in
>>>> unit/test-gatt.c).
>>>> Currently I am able to run the "test/example-gatt-server" and see my
>>>> custom services and characteristics, but I need to define an specific
>>>> service/characteristic to be only accessible trough LE or BR/EDR
>>>> transport parameter. I was digging into the code but I was unable to
>>>> find how to set it for the GATT server.
>>>>
>>>> In other words, what I want to do is launch the gatt-server and then,
>>>> when inspecting the services/characteristic with gatttool, the returned
>>>> list should be different if I run gatttool with "-p 31" or not (notice
>>>> how the gatttool prompt is set to LE or BR).
>>>>
>>>> # gatttool -I -b 00:40:9D:98:99:BD -p 0
>>>> [00:40:9D:98:99:BD][LE]> connect
>>>> Attempting to connect to 00:40:9D:98:99:BD
>>>> Connection successful
>>>> [00:40:9D:98:99:BD][LE]> primary
>>>> attr handle: 0x0001, end grp handle: 0x0005 uuid:
>>>> 00001800-0000-1000-8000-00805f9b34fb
>>>> attr handle: 0x0006, end grp handle: 0x0009 uuid:
>>>> 00001801-0000-1000-8000-00805f9b34fb
>>>> attr handle: 0x000a, end grp handle: 0x000d uuid:
>>>> 0000180f-0000-1000-8000-00805f9b34fb
>>>> attr handle: 0x000e, end grp handle: 0x001d uuid:
>>>> 12345678-1234-5678-1234-56789abcdef0
>>>> attr handle: 0x001e, end grp handle: 0x0025 uuid:
>>>> 0000180d-0000-1000-8000-00805f9b34fb
>>>>
>>>>
>>>> # /tmp/gatttool -I -b 00:40:9D:98:99:BD -p 31
>>>> [00:40:9D:98:99:BD][BR]> connect
>>>> Attempting to connect to 00:40:9D:98:99:BD
>>>> Connection successful
>>>> [00:40:9D:98:99:BD][BR]> primary
>>>> attr handle: 0x0001, end grp handle: 0x0005 uuid:
>>>> 00001800-0000-1000-8000-00805f9b34fb
>>>> attr handle: 0x0006, end grp handle: 0x0009 uuid:
>>>> 00001801-0000-1000-8000-00805f9b34fb
>>>> attr handle: 0x000a, end grp handle: 0x0019 uuid:
>>>> 12345678-1234-5678-1234-56789abcdef0
>>>> attr handle: 0x001a, end grp handle: 0x001d uuid:
>>>> 0000180f-0000-1000-8000-00805f9b34fb
>>>> attr handle: 0x001e, end grp handle: 0x0025 uuid:
>>>> 0000180d-0000-1000-8000-00805f9b34fb
>>>>
>>>>
>>>>
>>>> I am using bluez 5.41. Is possible to advertise a service only for LE or
>>>> BR? I guess it should because is part of the SIG certification and is
>>>> part of the unit/test-gatt.
>>> This might be because the spec was no clear about the database being
>>> bearer specific, which in my opinion this is a oversight since then we
>>> can't represent attributes of dual mode devices with a unified object,
>>> and I really wonder if this has to be forced up into the API, if it
>>> does then we would have to encode bearer information into the object
>>> path (argh!) for client and for server would probably need a property
>>> telling which bearer this would be available and encode this into to
>>> the database which may leave gaps in the handles or just duplicate
>>> everything, for server Id probably just hide the services based on the
>>> bearer, but we still need to store the CCC configuration in a bearer
>>> specific manner.
>>>
>>
>> So, what can I do in order to pass that specific bluetooth SIG tests?
>> That test cases need to ensure that an specific service/char in only
>> accessible on LE or BR, so they had to be different.
>> Do you have any idea or suggestion? It would be really welcome, if not I
>> have no idea how to proceed to complete the SIG validation with bluez stuff.
>> I was even trying to modify some files into the code, but I am not
>> familiar with that and it obviously did not work.
>
> I understand the silent to this last question as a no. So I assume that
> any user trying to pass this test will fail (at least if using bluez).
> So should the specification be changed? Should bluez adapt to it? In the
> current state that SIG certification can not be passed.

That if you want to qualify with GATT over BR/EDR, something that we
may actually have an option to disable in the future, or perhaps just
remove it entirely given this tests would possible affect that GATT
database layout, either by creating handle gaps or duplication. So
perhaps you could give some feedback if you do intend to use GATT over
BR/EDR or not? If it turn out no one benefit from it Id just remove
it.

-- 
Luiz Augusto von Dentz

Re: how to advertise a GATT service only for LE or BR/EDR?

[Hermida, Isaac]

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[Hermida, Isaac]

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Re: how to advertise a GATT service only for LE or BR/EDR?

[Luiz Augusto von Dentz]

Hi Isaac,

On Wed, Oct 4, 2017 at 6:43 PM, Hermida, Isaac <Isaac.Hermida@digi.com> wrote:
> Hi Luiz,
>
> On 10/03/2017 08:54 AM, Hermida, Isaac wrote:
>> Hi Luiz,
>>
>> On 10/02/2017 06:00 PM, Luiz Augusto von Dentz wrote:
>>> Hi Isaac,
>>>
>>> On Mon, Oct 2, 2017 at 10:03 AM, Hermida, Isaac <Isaac.Hermida@digi.com> wrote:
>>>> Hi Luiz et all,
>>>>
>>>> On 09/29/2017 08:44 AM, Hermida, Isaac wrote:
>>>>> Hi Luiz,
>>>>>
>>>>> On 09/28/2017 08:21 PM, Luiz Augusto von Dentz wrote:
>>>>>> Hi Isaac,
>>>>>>
>>>>>> On Thu, Sep 28, 2017 at 7:43 PM, Hermida, Isaac <Isaac.Hermida@digi.com> wrote:
>>>>>>> Hi group,
>>>>>>>
>>>>>>> As part of the bluetooth SIG certification there are two test cases
>>>>>>> /TP/GAR/CL/BI-34-C and /TP/GAR/CL/BI-35-C (you can see they defined in
>>>>>>> unit/test-gatt.c).
>>>>>>> Currently I am able to run the "test/example-gatt-server" and see my
>>>>>>> custom services and characteristics, but I need to define an specific
>>>>>>> service/characteristic to be only accessible trough LE or BR/EDR
>>>>>>> transport parameter. I was digging into the code but I was unable to
>>>>>>> find how to set it for the GATT server.
>>>>>>>
>>>>>>> In other words, what I want to do is launch the gatt-server and then,
>>>>>>> when inspecting the services/characteristic with gatttool, the returned
>>>>>>> list should be different if I run gatttool with "-p 31" or not (notice
>>>>>>> how the gatttool prompt is set to LE or BR).
>>>>>>>
>>>>>>> # gatttool -I -b 00:40:9D:98:99:BD -p 0
>>>>>>> [00:40:9D:98:99:BD][LE]> connect
>>>>>>> Attempting to connect to 00:40:9D:98:99:BD
>>>>>>> Connection successful
>>>>>>> [00:40:9D:98:99:BD][LE]> primary
>>>>>>> attr handle: 0x0001, end grp handle: 0x0005 uuid:
>>>>>>> 00001800-0000-1000-8000-00805f9b34fb
>>>>>>> attr handle: 0x0006, end grp handle: 0x0009 uuid:
>>>>>>> 00001801-0000-1000-8000-00805f9b34fb
>>>>>>> attr handle: 0x000a, end grp handle: 0x000d uuid:
>>>>>>> 0000180f-0000-1000-8000-00805f9b34fb
>>>>>>> attr handle: 0x000e, end grp handle: 0x001d uuid:
>>>>>>> 12345678-1234-5678-1234-56789abcdef0
>>>>>>> attr handle: 0x001e, end grp handle: 0x0025 uuid:
>>>>>>> 0000180d-0000-1000-8000-00805f9b34fb
>>>>>>>
>>>>>>>
>>>>>>> # /tmp/gatttool -I -b 00:40:9D:98:99:BD -p 31
>>>>>>> [00:40:9D:98:99:BD][BR]> connect
>>>>>>> Attempting to connect to 00:40:9D:98:99:BD
>>>>>>> Connection successful
>>>>>>> [00:40:9D:98:99:BD][BR]> primary
>>>>>>> attr handle: 0x0001, end grp handle: 0x0005 uuid:
>>>>>>> 00001800-0000-1000-8000-00805f9b34fb
>>>>>>> attr handle: 0x0006, end grp handle: 0x0009 uuid:
>>>>>>> 00001801-0000-1000-8000-00805f9b34fb
>>>>>>> attr handle: 0x000a, end grp handle: 0x0019 uuid:
>>>>>>> 12345678-1234-5678-1234-56789abcdef0
>>>>>>> attr handle: 0x001a, end grp handle: 0x001d uuid:
>>>>>>> 0000180f-0000-1000-8000-00805f9b34fb
>>>>>>> attr handle: 0x001e, end grp handle: 0x0025 uuid:
>>>>>>> 0000180d-0000-1000-8000-00805f9b34fb
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> I am using bluez 5.41. Is possible to advertise a service only for LE or
>>>>>>> BR? I guess it should because is part of the SIG certification and is
>>>>>>> part of the unit/test-gatt.
>>>>>> This might be because the spec was no clear about the database being
>>>>>> bearer specific, which in my opinion this is a oversight since then we
>>>>>> can't represent attributes of dual mode devices with a unified object,
>>>>>> and I really wonder if this has to be forced up into the API, if it
>>>>>> does then we would have to encode bearer information into the object
>>>>>> path (argh!) for client and for server would probably need a property
>>>>>> telling which bearer this would be available and encode this into to
>>>>>> the database which may leave gaps in the handles or just duplicate
>>>>>> everything, for server Id probably just hide the services based on the
>>>>>> bearer, but we still need to store the CCC configuration in a bearer
>>>>>> specific manner.
>>>>>>
>>>>>
>>>>> So, what can I do in order to pass that specific bluetooth SIG tests?
>>>>> That test cases need to ensure that an specific service/char in only
>>>>> accessible on LE or BR, so they had to be different.
>>>>> Do you have any idea or suggestion? It would be really welcome, if not I
>>>>> have no idea how to proceed to complete the SIG validation with bluez stuff.
>>>>> I was even trying to modify some files into the code, but I am not
>>>>> familiar with that and it obviously did not work.
>>>>
>>>> I understand the silent to this last question as a no. So I assume that
>>>> any user trying to pass this test will fail (at least if using bluez).
>>>> So should the specification be changed? Should bluez adapt to it? In the
>>>> current state that SIG certification can not be passed.
>>>
>>> That if you want to qualify with GATT over BR/EDR, something that we
>>> may actually have an option to disable in the future, or perhaps just
>>> remove it entirely given this tests would possible affect that GATT
>>> database layout, either by creating handle gaps or duplication. So
>>> perhaps you could give some feedback if you do intend to use GATT over
>>> BR/EDR or not? If it turn out no one benefit from it Id just remove
>>> it.
>>>
>>
>> Thanks for the quick reply. I do not know how any other people was able
>> to pass these SIG lab tests (BI-34-C and BI-35-C).
>> I do not plan to use GATT over BR/EDR. For me just removing it would be
>> enough. If you can point me where/how to do that it would be great so I
>> can dig in the code (I am not familiar with that code).
>>
>> Thx,
>>      Isaac
>
>
> Yesterday I did apply the patch (gatt: Remove support of ATT over
> BR/EDR) on bluez-5.41 (my current version) and passed it to the lab. I
> was waiting for their feedback but I did not get a reply yet, so just to
> let you know that I get the patch and applied it.
> As I see it, that patch removed the support for ATT over BR/EDR, so I
> guess that another way to pass that test is modifying the firmware of
> the bluetooth chip to disable it at a hw level.
> And, in order to pass the other test case (BI-35-C), I will need to do
> not apply the mentioned patch and create a similar one for ATT over LE,
> or is there another way to accomplish /TP/GAR/CL/BI-35-C?

Id assume you would not have to run those tests if ATT over BR/EDR is
not supported:

4.5.72 TP/GAR/CL/BI-35-C [Read Characteristic Value \u2013 Invalid
Transport Access over
LE]
Verify Generic Attribute Profile client behavior when an attempt to
use LE transport to execute
the Read Characteristic Value procedure on a characteristic contained
within a service defined
for use only over BR/EDR transport.

Without BR/EDR there is no reason to run this test as all the
attributes should be valid.

-- 
Luiz Augusto von Dentz

Re: how to advertise a GATT service only for LE or BR/EDR?

[Hermida, Isaac]

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Re: how to advertise a GATT service only for LE or BR/EDR?

[Luiz Augusto von Dentz]

Hi Isaac,

On Mon, Oct 9, 2017 at 1:21 PM, Hermida, Isaac <Isaac.Hermida@digi.com> wro=
te:
> Hi Luiz,
>
> On 10/05/2017 11:40 AM, Luiz Augusto von Dentz wrote:
>> Hi Isaac,
>>
>> On Wed, Oct 4, 2017 at 6:43 PM, Hermida, Isaac <Isaac.Hermida@digi.com> =
wrote:
>>> Hi Luiz,
>>>
>>> On 10/03/2017 08:54 AM, Hermida, Isaac wrote:
>>>> Hi Luiz,
>>>>
>>>> On 10/02/2017 06:00 PM, Luiz Augusto von Dentz wrote:
>>>>> Hi Isaac,
>>>>>
>>>>> On Mon, Oct 2, 2017 at 10:03 AM, Hermida, Isaac <Isaac.Hermida@digi.c=
om> wrote:
>>>>>> Hi Luiz et all,
>>>>>>
>>>>>> On 09/29/2017 08:44 AM, Hermida, Isaac wrote:
>>>>>>> Hi Luiz,
>>>>>>>
>>>>>>> On 09/28/2017 08:21 PM, Luiz Augusto von Dentz wrote:
>>>>>>>> Hi Isaac,
>>>>>>>>
>>>>>>>> On Thu, Sep 28, 2017 at 7:43 PM, Hermida, Isaac <Isaac.Hermida@dig=
i.com> wrote:
>>>>>>>>> Hi group,
>>>>>>>>>
>>>>>>>>> As part of the bluetooth SIG certification there are two test cas=
es
>>>>>>>>> /TP/GAR/CL/BI-34-C and /TP/GAR/CL/BI-35-C (you can see they defin=
ed in
>>>>>>>>> unit/test-gatt.c).
>>>>>>>>> Currently I am able to run the "test/example-gatt-server" and see=
 my
>>>>>>>>> custom services and characteristics, but I need to define an spec=
ific
>>>>>>>>> service/characteristic to be only accessible trough LE or BR/EDR
>>>>>>>>> transport parameter. I was digging into the code but I was unable=
 to
>>>>>>>>> find how to set it for the GATT server.
>>>>>>>>>
>>>>>>>>> In other words, what I want to do is launch the gatt-server and t=
hen,
>>>>>>>>> when inspecting the services/characteristic with gatttool, the re=
turned
>>>>>>>>> list should be different if I run gatttool with "-p 31" or not (n=
otice
>>>>>>>>> how the gatttool prompt is set to LE or BR).
>>>>>>>>>
>>>>>>>>> # gatttool -I -b 00:40:9D:98:99:BD -p 0
>>>>>>>>> [00:40:9D:98:99:BD][LE]> connect
>>>>>>>>> Attempting to connect to 00:40:9D:98:99:BD
>>>>>>>>> Connection successful
>>>>>>>>> [00:40:9D:98:99:BD][LE]> primary
>>>>>>>>> attr handle: 0x0001, end grp handle: 0x0005 uuid:
>>>>>>>>> 00001800-0000-1000-8000-00805f9b34fb
>>>>>>>>> attr handle: 0x0006, end grp handle: 0x0009 uuid:
>>>>>>>>> 00001801-0000-1000-8000-00805f9b34fb
>>>>>>>>> attr handle: 0x000a, end grp handle: 0x000d uuid:
>>>>>>>>> 0000180f-0000-1000-8000-00805f9b34fb
>>>>>>>>> attr handle: 0x000e, end grp handle: 0x001d uuid:
>>>>>>>>> 12345678-1234-5678-1234-56789abcdef0
>>>>>>>>> attr handle: 0x001e, end grp handle: 0x0025 uuid:
>>>>>>>>> 0000180d-0000-1000-8000-00805f9b34fb
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> # /tmp/gatttool -I -b 00:40:9D:98:99:BD -p 31
>>>>>>>>> [00:40:9D:98:99:BD][BR]> connect
>>>>>>>>> Attempting to connect to 00:40:9D:98:99:BD
>>>>>>>>> Connection successful
>>>>>>>>> [00:40:9D:98:99:BD][BR]> primary
>>>>>>>>> attr handle: 0x0001, end grp handle: 0x0005 uuid:
>>>>>>>>> 00001800-0000-1000-8000-00805f9b34fb
>>>>>>>>> attr handle: 0x0006, end grp handle: 0x0009 uuid:
>>>>>>>>> 00001801-0000-1000-8000-00805f9b34fb
>>>>>>>>> attr handle: 0x000a, end grp handle: 0x0019 uuid:
>>>>>>>>> 12345678-1234-5678-1234-56789abcdef0
>>>>>>>>> attr handle: 0x001a, end grp handle: 0x001d uuid:
>>>>>>>>> 0000180f-0000-1000-8000-00805f9b34fb
>>>>>>>>> attr handle: 0x001e, end grp handle: 0x0025 uuid:
>>>>>>>>> 0000180d-0000-1000-8000-00805f9b34fb
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I am using bluez 5.41. Is possible to advertise a service only fo=
r LE or
>>>>>>>>> BR? I guess it should because is part of the SIG certification an=
d is
>>>>>>>>> part of the unit/test-gatt.
>>>>>>>> This might be because the spec was no clear about the database bei=
ng
>>>>>>>> bearer specific, which in my opinion this is a oversight since the=
n we
>>>>>>>> can't represent attributes of dual mode devices with a unified obj=
ect,
>>>>>>>> and I really wonder if this has to be forced up into the API, if i=
t
>>>>>>>> does then we would have to encode bearer information into the obje=
ct
>>>>>>>> path (argh!) for client and for server would probably need a prope=
rty
>>>>>>>> telling which bearer this would be available and encode this into =
to
>>>>>>>> the database which may leave gaps in the handles or just duplicate
>>>>>>>> everything, for server Id probably just hide the services based on=
 the
>>>>>>>> bearer, but we still need to store the CCC configuration in a bear=
er
>>>>>>>> specific manner.
>>>>>>>>
>>>>>>>
>>>>>>> So, what can I do in order to pass that specific bluetooth SIG test=
s?
>>>>>>> That test cases need to ensure that an specific service/char in onl=
y
>>>>>>> accessible on LE or BR, so they had to be different.
>>>>>>> Do you have any idea or suggestion? It would be really welcome, if =
not I
>>>>>>> have no idea how to proceed to complete the SIG validation with blu=
ez stuff.
>>>>>>> I was even trying to modify some files into the code, but I am not
>>>>>>> familiar with that and it obviously did not work.
>>>>>>
>>>>>> I understand the silent to this last question as a no. So I assume t=
hat
>>>>>> any user trying to pass this test will fail (at least if using bluez=
).
>>>>>> So should the specification be changed? Should bluez adapt to it? In=
 the
>>>>>> current state that SIG certification can not be passed.
>>>>>
>>>>> That if you want to qualify with GATT over BR/EDR, something that we
>>>>> may actually have an option to disable in the future, or perhaps just
>>>>> remove it entirely given this tests would possible affect that GATT
>>>>> database layout, either by creating handle gaps or duplication. So
>>>>> perhaps you could give some feedback if you do intend to use GATT ove=
r
>>>>> BR/EDR or not? If it turn out no one benefit from it Id just remove
>>>>> it.
>>>>>
>>>>
>>>> Thanks for the quick reply. I do not know how any other people was abl=
e
>>>> to pass these SIG lab tests (BI-34-C and BI-35-C).
>>>> I do not plan to use GATT over BR/EDR. For me just removing it would b=
e
>>>> enough. If you can point me where/how to do that it would be great so =
I
>>>> can dig in the code (I am not familiar with that code).
>>>>
>>>> Thx,
>>>>       Isaac
>>>
>>>
>>> Yesterday I did apply the patch (gatt: Remove support of ATT over
>>> BR/EDR) on bluez-5.41 (my current version) and passed it to the lab. I
>>> was waiting for their feedback but I did not get a reply yet, so just t=
o
>>> let you know that I get the patch and applied it.
>>> As I see it, that patch removed the support for ATT over BR/EDR, so I
>>> guess that another way to pass that test is modifying the firmware of
>>> the bluetooth chip to disable it at a hw level.
>>> And, in order to pass the other test case (BI-35-C), I will need to do
>>> not apply the mentioned patch and create a similar one for ATT over LE,
>>> or is there another way to accomplish /TP/GAR/CL/BI-35-C?
>>
>> Id assume you would not have to run those tests if ATT over BR/EDR is
>> not supported:
>>
>> 4.5.72 TP/GAR/CL/BI-35-C [Read Characteristic Value \u2013 Invalid
>> Transport Access over
>> LE]
>> Verify Generic Attribute Profile client behavior when an attempt to
>> use LE transport to execute
>> the Read Characteristic Value procedure on a characteristic contained
>> within a service defined
>> for use only over BR/EDR transport.
>>
>> Without BR/EDR there is no reason to run this test as all the
>> attributes should be valid.
>>
>
>
> Our product is dual so those tests are mandatory. Additionally, our
> product is 4.2, no 4.0.
> The patch you proposed (gatt: Remove support of ATT over BR/EDR) is not
> valid and will not work (if you want I can add details to the other
> thread) and it will break other tests needed for the certification. I
> would suggest to reject it.
> To put some light in tests BI-34-C and BI-35-C, it consists in define a
> characteristic only available through the transport layer LE or BR/EDR,
> so in one case the value can be read, and in the other case it is
> rejected. I can add more details if needed.

Im pretty sure it is possible since chrome OS has done it:

https://www.bluetooth.org/tpg/QLI_viewQDL.cfm?qid=3D22333

Though I can see the ATT over BR/EDR is in fact mandatory, the ICS says:

C.1: Mandatory IF (SUM ICS 12/2 =E2=80=9CBluetooth Basic Rate Core Host
Configuration=E2=80=9D OR SUM ICS 12/9
=E2=80=9CBluetooth Basic Rate and Low Energy Combined Core Host
Configuration=E2=80=9D) is supported,
otherwise Excluded.

> Currently the workaround that I am doing is record the type of
> connection (LE or BR/EDR) and return the error code for one specific
> characteristic (that I register in my gatt server application), so I
> customize my application. The lab did not confirm/dismiss it yet, but
> hopefully it is what they need.

Afaik any service not registered over SDP should not be available over
BR/EDR, which is perhaps why the current code only does expose GATT
and GAP service, nothing else. Now I haven't found anything
prohibiting GATT discovery to happen over BR/EDR, just exchange MTU,
but the SDP service already carries the handles which I assume is what
PTS uses given there are tests like:

4.4.15 TP/GAD/SR/BV-07-C [Discover Primary Services using SDP - from Server=
]

Anyway, the end result is that we cannot completely disable ATT over
BR/EDR, and might have to push the bearer details up to the
application.

Note that exposing the connected bearer is not enough in case a device
connects over both bearers the application will have no means to
distinguish in which bearer the command is coming from, this appears
to be a problem to Android HAL as well:

https://android.googlesource.com/platform/hardware/libhardware/+/master/inc=
lude/hardware/bt_gatt_server.h#71

So probably everyone is passing with a custom application which
detects, or asks the user input, when to return an error.

> Thanks for the support on this issue. Let me know if I can help in
> anything, if I need to provide more details, if you want a reply in the
> patch thread or any other stuff.
> Regards,
>    Isaac



--=20
Luiz Augusto von Dentz

Re: how to advertise a GATT service only for LE or BR/EDR?

[Hermida, Isaac]

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