[PATCH 7/8] GAS: End remain-on-channel due to delayed GAS comeback request

Jouni Malinen j at w1.fi
Sun Dec 20 02:14:27 PST 2015

On Sun, Dec 20, 2015 at 08:52:37AM +0000, Peer, Ilan wrote:
> Thanks. Let me know if there are issues with the last patch.

It does increase the risk of failures with deployed APs. I'm not at all
convinced that they can reply quickly enough to GAS comeback requests in
all cases.. I had actually experimented with this some time earlier but
with even a shorted timeout (100 ms). wpa_supplicant does not currently
retry GAS comeback requests at higher layer and it may be necessary to
add such a retry mechanism before dropping the wait timeout on each
individual frame.

Other than that, the change itself is clearly of significant benefit for
the cases where the first wait cannot be extended and mac80211 ends up
waiting for significant amount of time between each attempt. I just
don't want to optimize this at the cost of reliability to already
deployed use cases.

Jouni Malinen                                            PGP id EFC895FA

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