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author | Yu Wang <yyuwang@codeaurora.org> | 2019-05-10 17:04:52 +0800 |
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committer | Johannes Berg <johannes.berg@intel.com> | 2019-05-24 11:26:44 +0200 |
commit | 79c92ca42b5a3e0ea172ea2ce8df8e125af237da (patch) | |
tree | 08884f0a15aadc6b1edf04c21e1d2c3a32a840e2 /net/mac80211/tdls.c | |
parent | 32b5a2c9950b9284000059d752f7afa164deb15e (diff) | |
download | linux-stable-79c92ca42b5a3e0ea172ea2ce8df8e125af237da.tar.gz linux-stable-79c92ca42b5a3e0ea172ea2ce8df8e125af237da.tar.bz2 linux-stable-79c92ca42b5a3e0ea172ea2ce8df8e125af237da.zip |
mac80211: handle deauthentication/disassociation from TDLS peer
When receiving a deauthentication/disassociation frame from a TDLS
peer, a station should not disconnect the current AP, but only
disable the current TDLS link if it's enabled.
Without this change, a TDLS issue can be reproduced by following the
steps as below:
1. STA-1 and STA-2 are connected to AP, bidirection traffic is running
between STA-1 and STA-2.
2. Set up TDLS link between STA-1 and STA-2, stay for a while, then
teardown TDLS link.
3. Repeat step #2 and monitor the connection between STA and AP.
During the test, one STA may send a deauthentication/disassociation
frame to another, after TDLS teardown, with reason code 6/7, which
means: Class 2/3 frame received from nonassociated STA.
On receive this frame, the receiver STA will disconnect the current
AP and then reconnect. It's not a expected behavior, purpose of this
frame should be disabling the TDLS link, not the link with AP.
Cc: stable@vger.kernel.org
Signed-off-by: Yu Wang <yyuwang@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/tdls.c')
-rw-r--r-- | net/mac80211/tdls.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c index 24c37f91ca46..ba8fe48952d9 100644 --- a/net/mac80211/tdls.c +++ b/net/mac80211/tdls.c @@ -1994,3 +1994,26 @@ void ieee80211_tdls_chsw_work(struct work_struct *wk) } rtnl_unlock(); } + +void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata, + const u8 *peer, u16 reason) +{ + struct ieee80211_sta *sta; + + rcu_read_lock(); + sta = ieee80211_find_sta(&sdata->vif, peer); + if (!sta || !sta->tdls) { + rcu_read_unlock(); + return; + } + rcu_read_unlock(); + + tdls_dbg(sdata, "disconnected from TDLS peer %pM (Reason: %u=%s)\n", + peer, reason, + ieee80211_get_reason_code_string(reason)); + + ieee80211_tdls_oper_request(&sdata->vif, peer, + NL80211_TDLS_TEARDOWN, + WLAN_REASON_TDLS_TEARDOWN_UNREACHABLE, + GFP_ATOMIC); +} |