[PATCH 1/2] Add SEND_ACTION control interface command for hostapd

Jouni Malinen j at w1.fi
Fri Dec 2 23:53:16 PST 2022

On Fri, Dec 02, 2022 at 05:02:41PM +0100, Raphaël Mélotte wrote:
> In our case we need to be able to send a DELBA frame to a station at an arbitrary point in time (the point is to tear down any existing block ack agreement for a very short period of time - on kernels that don't support NL80211_TID_CONFIG_ATTR_AMPDU_CTRL yet).
> Would a new command to send a DELBA frame to a specific station have more chances to be accepted?

The use case of sending a DELBA to control a block ack agreement sounds
exactly like a case that I was worried about when injecting arbitrary
frames without informing the local stack about that.. Isn't the
appropriate approach for addressing that to provide such capability in
the kernel? If this is just to have a temporary workaround for not
wanting to update a kernel for some systems, it does not really sound
like a convincing argument to complicate upstream hostapd with a feature
that would then likely need to be maintained for significant amount of
time in practice.

Jouni Malinen                                            PGP id EFC895FA

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