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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date:   Mon, 8 Jul 2019 16:19:45 +0300
Message-ID: <CABBYNZLyutV_DWGfu3OKn0UKaC+VUwpTJej477WP92WQcrPbRA@mail.gmail.com>
Subject: Re: bluetoothctl: list-attributes doesn't list services from example-gatt-server
To:     =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= <zajec5@gmail.com>
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Hi Rafal,

On Sun, Jul 7, 2019 at 2:53 PM Rafa=C5=82 Mi=C5=82ecki <zajec5@gmail.com> w=
rote:
>
> Hi,
>
> I have 2 notebooks with Bluetooth running bluez 5.30. I called them:
> 1) "elitebook" with controller 20:16:B9:D8:A9:3B
> 2) "matebook" with controller 38:BA:F8:3F:7C:A7
>
> Normally, when I check elitebook from matebook I get this:
>
> [elitebook]# info 20:16:B9:D8:A9:3B
> Device 20:16:B9:D8:A9:3B (public)
>          Name: elitebook
>          Alias: elitebook
>          Class: 0x001c010c
>          Icon: computer
>          Paired: yes
>          Trusted: yes
>          Blocked: no
>          Connected: yes
>          LegacyPairing: no
>          UUID: IrMC Sync                 (00001104-0000-1000-8000-00805f9=
b34fb)
>          UUID: OBEX Object Push          (00001105-0000-1000-8000-00805f9=
b34fb)
>          UUID: OBEX File Transfer        (00001106-0000-1000-8000-00805f9=
b34fb)
>          UUID: Headset                   (00001108-0000-1000-8000-00805f9=
b34fb)
>          UUID: Audio Source              (0000110a-0000-1000-8000-00805f9=
b34fb)
>          UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9=
b34fb)
>          UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9=
b34fb)
>          UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9=
b34fb)
>          UUID: Headset AG                (00001112-0000-1000-8000-00805f9=
b34fb)
>          UUID: Phonebook Access Server   (0000112f-0000-1000-8000-00805f9=
b34fb)
>          UUID: Message Access Server     (00001132-0000-1000-8000-00805f9=
b34fb)
>          UUID: Message Notification Se.. (00001133-0000-1000-8000-00805f9=
b34fb)
>          UUID: PnP Information           (00001200-0000-1000-8000-00805f9=
b34fb)
>          UUID: Vendor specific           (00005005-0000-1000-8000-0002ee0=
00001)
>          Modalias: usb:v1D6Bp0246d0532
>
> I decided to test GATT. On elitebook I started:
> ./test/example-gatt-server
> and waited to let matebook refresh all info.
>
> After that I got:
>
> [elitebook]# info 20:16:B9:D8:A9:3B
> Device 20:16:B9:D8:A9:3B (public)
>          Name: elitebook
>          Alias: elitebook
>          Class: 0x001c010c
>          Icon: computer
>          Paired: yes
>          Trusted: yes
>          Blocked: no
>          Connected: yes
>          LegacyPairing: no
>          UUID: IrMC Sync                 (00001104-0000-1000-8000-00805f9=
b34fb)
>          UUID: OBEX Object Push          (00001105-0000-1000-8000-00805f9=
b34fb)
>          UUID: OBEX File Transfer        (00001106-0000-1000-8000-00805f9=
b34fb)
>          UUID: Headset                   (00001108-0000-1000-8000-00805f9=
b34fb)
>          UUID: Audio Source              (0000110a-0000-1000-8000-00805f9=
b34fb)
>          UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9=
b34fb)
>          UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9=
b34fb)
>          UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9=
b34fb)
>          UUID: Headset AG                (00001112-0000-1000-8000-00805f9=
b34fb)
>          UUID: Phonebook Access Server   (0000112f-0000-1000-8000-00805f9=
b34fb)
>          UUID: Message Access Server     (00001132-0000-1000-8000-00805f9=
b34fb)
>          UUID: Message Notification Se.. (00001133-0000-1000-8000-00805f9=
b34fb)
>          UUID: PnP Information           (00001200-0000-1000-8000-00805f9=
b34fb)
>          UUID: Heart Rate                (0000180d-0000-1000-8000-00805f9=
b34fb)
>          UUID: Battery Service           (0000180f-0000-1000-8000-00805f9=
b34fb)
>          UUID: Vendor specific           (00005005-0000-1000-8000-0002ee0=
00001)
>          UUID: Vendor specific           (12345678-1234-5678-1234-56789ab=
cdef0)
>          Modalias: usb:v1D6Bp0246d0532
>
> That seems all correct for now. Test example-gatt-server registers
> Heart Rate, Battery & Test services. All of them appeared as expected.
>
> My problem is that I can't list GATT attributes. I don't any output.
> Is there anything I'm doing incorrectly?
>
> [elitebook]# menu gatt
> Menu gatt:
> Available commands:
> -------------------
> list-attributes [dev]                             List attributes
> select-attribute <attribute/UUID>                 Select attribute
> attribute-info [attribute/UUID]                   Select attribute
> read [offset]                                     Read attribute value
> write <data=3Dxx xx ...> [offset]                   Write attribute value
> acquire-write                                     Acquire Write file desc=
riptor
> release-write                                     Release Write file desc=
riptor
> acquire-notify                                    Acquire Notify file des=
criptor
> release-notify                                    Release Notify file des=
criptor
> notify <on/off>                                   Notify attribute value
> register-application [UUID ...]                   Register profile to con=
nect
> unregister-application                            Unregister profile
> register-service <UUID>                           Register application se=
rvice.
> unregister-service <UUID/object>                  Unregister application =
service
> register-includes <UUID>                          Register as Included se=
rvice in.
> unregister-includes <Service-UUID><Inc-UUID>      Unregister Included ser=
vice.
> register-characteristic <UUID> <Flags=3Dread,write,notify...>  Register a=
pplication characteristic
> unregister-characteristic <UUID/object>           Unregister application =
characteristic
> register-descriptor <UUID> <Flags=3Dread,write...>  Register application =
descriptor
> unregister-descriptor <UUID/object>               Unregister application =
descriptor
> back                                              Return to main menu
> version                                           Display version
> quit                                              Quit program
> exit                                              Quit program
> help                                              Display help about this=
 program
> export                                            Print evironment variab=
les
> [elitebook]# list-attributes
> [elitebook]# list-attributes 20:16:B9:D8:A9:3B

I guess what you are looking for is list-attributes local though that
only works for service register by bluetoothctl itself not by other
applications, those objects are normally accessible to bluetoothd only
and we don't expose objects from other application.
--=20
Luiz Augusto von Dentz