Re: [mosquitto-dev] [EXTERNAL]: Re: CleanStart only on first CONNECT

[Schär, Beat <beat.schaer@xxxxxxxxxx>]

Yes, that would be a good idea.


-----Ursprüngliche Nachricht-----
Von: mosquitto-dev-bounces@xxxxxxxxxxx <mosquitto-dev-bounces@xxxxxxxxxxx> Im Auftrag von Roger Light
Gesendet: Mittwoch, 9. Oktober 2019 17:21
An: General development discussions for the mosquitto project <mosquitto-dev@xxxxxxxxxxx>
Betreff: [EXTERNAL]: Re: [mosquitto-dev] CleanStart only on first CONNECT

Hi Beat,

It's not currently possible, but I agree that it should be.

How about if you could configure the clean start behaviour something like this:

mosquitto_int_option(mosq, MOSQ_OPT_CLEAN_START, ALWAYS); mosquitto_int_option(mosq, MOSQ_OPT_CLEAN_START, FIRST_TIME_ONLY);

Regards,

Roger

On Wed, 9 Oct 2019 at 09:00, Schär, Beat <beat.schaer@xxxxxxxxxx> wrote:
>
> Hi
>
>
>
> I have a use-case here, where I want to be able to send CleanStart=true only on the initial CONNECT. All subsequent CONNECTs, which are always re-connects because of an unplanned disconnection, should call CONNECT with CleanStart=false, therefore enabling the client as well as the broker to continue the interrupted session.
>
>
>
> Now with libmosquitto I don’t see how this could be achieved (even after studying the source code): I can set the clean_start flag only once, during the call to mosquito_new() and then it stays the way it has been set. There is no way to change it to false after the initial connection has been achieved, without calling mosquito_reinitialise(), which will itself clean-up everything (including currenty unsent messages). But resending unsent messages after an unplanned disconnect is exactly one of the things I’d like to achieve.
>
>
>
> So does anybody knows if this is possible in libmosquitto and if yes, how it could be achieved.
>
>
>
> Thanks
>
>
>
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