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mac80211: protect TDLS discovery session

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After sending a TDLS discovery-request, we expect a reply to arrive on
the AP's channel. We must stay on the channel (no PSM, scan, etc.), since
a TDLS setup-response is a direct packet not buffered by the AP.
Add a new mac80211 driver callback to allow discovery session protection.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arik Nemtsov
2014-06-11 17:18:27 +03:00
committed by Johannes Berg
parent 7adc3e4664
commit ee10f2c779
4 changed files with 44 additions and 1 deletions
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10
net/mac80211/tdls.c
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@@ -10,6 +10,7 @@
#include <linux/ieee80211.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
/* give usermode some time for retries in setting up the TDLS session */
#define TDLS_PEER_SETUP_TIMEOUT (15 * HZ)
@@ -442,8 +443,15 @@ int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
peer_capability, initiator,
extra_ies, extra_ies_len);
break;
case WLAN_TDLS_SETUP_CONFIRM:
case WLAN_TDLS_DISCOVERY_REQUEST:
/*
* Protect the discovery so we can hear the TDLS discovery
* response frame. It is transmitted directly and not buffered
* by the AP.
*/
drv_mgd_protect_tdls_discover(sdata->local, sdata);
/* fall-through */
case WLAN_TDLS_SETUP_CONFIRM:
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
/* no special handling */
ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,