Re: [PATCH BlueZ 2/2] advertising: Add scan response support in bluetoothctl

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On Tue, Nov 26, 2024 at 1:19 AM Luiz Augusto von Dentz
<luiz.dentz@xxxxxxxxx> wrote:

> We got a few options here:
>
> 1. As separate commands
> 2. As extra optional argument to existing commands
> 3. As mandatory argument that indicates its type to existing commands
>
> I think option 2 is the better one if we could skip entering ad with
> an empty array e.g:
>
> advertise.data type "" "srd..."
>
> Option 3 would break existing scripts since we need to change the
> argument positions, but we don't really care about it since now, so I
> don't think it would be a problem, but since we have option 2 I guess
> that is better in this sense.

Option 3 seems somewhat aggressive, in my opinion. From the outset,
`bluetoothctl` has not offered commands for scan responses, so I
assume these are not crucial for most developers. Therefore, making it
a mandatory argument to force all developers to be aware of scan
responses seems overly aggressive.

Option 2 appears more favorable, but I think that writing two
different datasets in one command is a bit complex. I would prefer to
set/get two datasets separately:

advertise.data type xx xx xx
advertise.data srd type yy yy yy
advertise.data
advertise.data srd

Option 1 remains my preferred choice because it seems simpler to me.
It also aligns well with the existing `clear` command:

advertise.sr-data type yy yy yy
advertise.clear sr-data

Is there any downside to introducing new commands?

The prefix 'sr-' may be hard to understand without reading the
documentation, but I haven't found a better abbreviation for 'scan
response'. Considering `bluetoothctl` is a command-line tool, I opted
for the shortest prefix.





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