From 95acac61ba66c4abd40e038dae8c1ed2e176c7b1 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 12 Jul 2011 12:30:59 +0200 Subject: mac80211: allow driver to disconnect after resume In WoWLAN, devices may use crypto keys for TX/RX and could also implement GTK rekeying. If the driver isn't able to retrieve replay counters and similar information from the device upon resume, or if the device isn't responsive due to platform issues, it isn't safe to keep the connection up as GTK rekey messages from during the sleep time could be replayed against it. The only protection against that is disconnecting from the AP. Modifying mac80211 to do that while it is resuming would be very complex and invasive in the case that the driver requires a reconfig, so do it after it has resumed completely. In that case, however, packets might be replayed since it can then only happen after TX/RX are up again, so mark keys for interfaces that need to disconnect as "tainted" and drop all packets that are sent or received with those keys. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/key.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/mac80211/key.h') diff --git a/net/mac80211/key.h b/net/mac80211/key.h index 86b216b01415..7d4e31f037d7 100644 --- a/net/mac80211/key.h +++ b/net/mac80211/key.h @@ -41,9 +41,11 @@ struct sta_info; * * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present * in the hardware for TX crypto hardware acceleration. + * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped. */ enum ieee80211_internal_key_flags { KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), + KEY_FLAG_TAINTED = BIT(1), }; enum ieee80211_internal_tkip_state { -- cgit v1.2.3