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authorEliad Peller <eliad@wizery.com>2016-02-14 13:56:35 +0200
committerJohannes Berg <johannes.berg@intel.com>2016-02-24 09:04:38 +0100
commitf8079d43cf0f1f0171606e75fcef6fe17bb183f2 (patch)
tree33ba813097bcab2d8a43f502e49bea9a31ba3181 /net/mac80211/cfg.c
parent109843b07aed8663a3c1fe9ef02c540b6ff203b4 (diff)
downloadlinux-f8079d43cf0f1f0171606e75fcef6fe17bb183f2.tar.bz2
mac80211: move TKIP TX IVs to public part of key struct
Some drivers/devices might want to set the IVs by themselves (and still let mac80211 generate MMIC). Specifically, this is needed when the device does offloading at certain times, and the driver has to make sure that the IVs of new tx frames (from the host) are synchronized with IVs that were potentially used during the offloading. Similarly to CCMP, move the TX IVs of TKIP keys to the public part of the key struct, and export a function to add the IV right into the crypto header. The public tx_pn field is defined as atomic64, so define TKIP_PN_TO_IV16/32 helper macros to convert it to iv16/32 when needed. Since the iv32 used for the p1k cache is taken directly from the frame, we can safely remove iv16/32 from being protected by tkip.txlock. Signed-off-by: Eliad Peller <eliadx.peller@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/cfg.c')
-rw-r--r--net/mac80211/cfg.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 66d22de93c8d..fe1704c4e8fb 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -339,8 +339,9 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
switch (key->conf.cipher) {
case WLAN_CIPHER_SUITE_TKIP:
- iv32 = key->u.tkip.tx.iv32;
- iv16 = key->u.tkip.tx.iv16;
+ pn64 = atomic64_read(&key->conf.tx_pn);
+ iv32 = TKIP_PN_TO_IV32(pn64);
+ iv16 = TKIP_PN_TO_IV16(pn64);
if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {