Hi João,

On Mon, Aug 26, 2013 at 06:49:38PM -0300, João Paulo Bodanese wrote:
> Hello Guys,
> 
> Is there any special reason the flag req_802154_ack is not set by
> default in the 6LowPan?
> 
What I understand is, that the ack request in the IEEE 802.15.4 layer is
default set. Look [1].

This works only for device which makes a auto ack via hardware. If your
hardware doens't make a auto ack, then you falling in this branch [2].

You will get a "ieee802154: bad frame received (type = ..." message. To
handle a ACK massage it currently not supported(I suppose). With my
at86rf230 device I will get this message.

We need to handle it there and add a "case IEEE802154_FC_TYPE_ACK:" and
handle the ack. Currently we handle DATA types only.

That's my point of view of currently ack mechanismn.


What do you mean exaclty with "req_802154_ack"?

- Alex

[1] 
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/net/ieee802154/6lowpan.c#n697
[2] 
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/net/mac802154/wpan.c?#n444

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