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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date:   Mon, 12 Nov 2018 16:40:33 +0200
Message-ID: <CABBYNZ+1RqUJm3c_mQjF0DNDy1GWTKRP-v-66VN1ihEpf6Y3iw@mail.gmail.com>
Subject: Re: [PATCH BlueZ v2] doc: Initial Bluetooth Mesh API
To:     Johan Hedberg <johan.hedberg@gmail.com>
Cc:     "Stotland, Inga" <inga.stotland@intel.com>,
        "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>,
        Marcel Holtmann <marcel@holtmann.org>,
        "Gix, Brian" <brian.gix@intel.com>
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Hi Johan,

On Mon, Nov 12, 2018 at 2:58 PM Johan Hedberg <johan.hedberg@gmail.com> wro=
te:
>
> Hi Luiz
>
> > On 12 Nov 2018, at 13.24, Luiz Augusto von Dentz <luiz.dentz@gmail.com>=
 wrote:
> >
> > It seems wrong  to me to have to send your own object as method
> > argument, usually this sort of communication goes as a Signal but it
> > seems the Element interface has no signal to be able to do something
> > like that.
>
> The problem with signals is that they cannot return an error, and I do th=
ink we=E2=80=99d want to have the daemon return an error if it cannot send =
the given message. Also, by default signals are broadcast, and it feels a b=
it hawkish to do unicast destinations for them.

Well unicast signals is not a new thing, though we never used it that
would be possible to do something like that, anyway D-Bus signals are
subscription based which is the reason we haven't consider it to be
problem to emit signal for Value changes in case of GATT attributes,
that said the lack of error result could indeed be a problem but some
of the errors are actually due to the checking object_path is valid?
Other errors Im not sure, Ive assume if there is a response that would
then call MessageReceived, but perhaps we want to validate the
transmission itself, but I though that wasn't possible in BlueZ.

--=20
Luiz Augusto von Dentz