Re: [PATCH v2 1/5] shared/att: Drop the connection if a request is received while one is pending.

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Hi Luiz,

>>> It seems this code is not following our coding style regarding multi
>>> line comments, check doc/coding-style.txt(M2: Multiple line comment)
>>> the first line should be empty.
>>>
>>
>> I didn't realize that was the comment style. I've seen both styles in
>> daemon code and I think I went with this one because of that. I'd
>> rather have the code be consistent (since shared/att uses this style
>> elsewhere) and maybe do a style correction pass in another patch?
>
> Sure, I can probably fix this myself just made the comment to let you
> know that we do in fact have a coding style for it.
>

Ah got it.


>>> This might cause a problem with our own code when connecting to each
>>> other if bt_att_cancel is used, apparently bt_att_cancel does not send
>>> anything to the remote side which seems to enable sending a new
>>> request without waiting any response for the first one.
>>>
>>
>> I'm confused. Do you mean if bt_att is being used in the client role,
>> it can send multiple requests this way? That is correct, though I
>> don't see how that's related to this patch? Currently bt_att_cancel
>> can be used to cancel waiting for a pending request and send the next
>> one, as you said. In that regard, it doesn't actually "cancel"
>> anything if the PDU has been sent over the air already. I don't know
>> how big of a problem this is, since the remote end should normally
>> detect the error and terminate the connection anyway. If this becomes
>> a problem we can always prevent canceling a request that has already
>> left the queue and is pending. Though, again, this isn't really
>> related to this patch unless I'm missing something.
>
> Sorry for the confusion, this patch is actually fine what we really
> need to fix is bt_att_cancel should not really remove the pending
> request otherwise the remote may disconnect if we proceed with another
> request.
>

Ok. I'll prepare a separate patch for that. We probably want
bt_att_cancel to keep the pending request pointer but it should
perhaps set the response and destroy callbacks to NULL. Same thing
applies to both outgoing requests and indications.

Cheers,
Arman
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