Commit 0834ae3c authored Nov 26, 2013 by Simon Wunderlich Committed by Johannes Berg Dec 02, 2013

mac80211: check csa wiphy flag in ibss before switching



When external CSA IEs are received (beacons or action messages), a
channel switch is triggered as well. This should only be allowed on
devices which actually support channel switches, otherwise disconnect.
(For the corresponding userspace invocation, the wiphy flag is checked
in nl80211).

Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent dda444d5

net/mac80211/ibss.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -823,6 +823,10 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
		if (err)
		return false;

		/* channel switch is not supported, disconnect */
		if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
		goto disconnect;

		params.count = csa_ie.count;
		params.chandef = csa_ie.chandef;

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