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authorAlexander Wetzel <alexander@wetzel-home.de>2019-03-19 21:34:08 +0100
committerJohannes Berg <johannes.berg@intel.com>2019-04-26 13:02:11 +0200
commit96fc6efb9ad9d0cd8cbb4462f0eb2a07092649e6 (patch)
tree5c17bac2a0df2ddcc155aaaa158c32ab5f87f4bd /net/mac80211/sta_info.c
parent6cdd3979a2bdc16116c5b2eb09475abf54ba9e70 (diff)
downloadlinux-96fc6efb9ad9d0cd8cbb4462f0eb2a07092649e6.tar.bz2
mac80211: IEEE 802.11 Extended Key ID support
Add support for Extended Key ID as defined in IEEE 802.11-2016. - Implement the nl80211 API for Extended Key ID - Extend mac80211 API to allow drivers to support Extended Key ID - Enable Extended Key ID by default for drivers only supporting SW crypto (e.g. mac80211_hwsim) - Allow unicast Tx usage to be supressed (IEEE80211_KEY_FLAG_NO_AUTO_TX) - Select the decryption key based on the MPDU keyid - Enforce existing assumptions in the code that rekeys don't change the cipher Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de> [remove module parameter] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/sta_info.c')
-rw-r--r--net/mac80211/sta_info.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index a81e1279a76d..a4932ee3595c 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -347,6 +347,15 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
sta->sta.max_rx_aggregation_subframes =
local->hw.max_rx_aggregation_subframes;
+ /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
+ * The Tx path starts to use a key as soon as the key slot ptk_idx
+ * references to is not NULL. To not use the initial Rx-only key
+ * prematurely for Tx initialize ptk_idx to an impossible PTK keyid
+ * which always will refer to a NULL key.
+ */
+ BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
+ sta->ptk_idx = INVALID_PTK_KEYIDX;
+
sta->local = local;
sta->sdata = sdata;
sta->rx_stats.last_rx = jiffies;