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authorJouni Malinen <j@w1.fi>2009-01-08 13:32:10 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-01-29 16:00:08 -0500
commit1f7d77ab69789980dad44e1af7afd3a68cd48276 (patch)
tree35406a27e707f0ebda27aaada47bc4c90fb26d31 /net
parent63a5ab82255a4ff5d0783f16427210f1d45d7ec8 (diff)
mac80211: 802.11w - Optional software CCMP for management frames
If driver/firmware/hardware does not support CCMP for management frames, it can now request mac80211 to take care of encrypting and decrypting management frames (when MFP is enabled) in software. The will need to add this new IEEE80211_KEY_FLAG_SW_MGMT flag when a CCMP key is being configured for TX side and return the undecrypted frames on RX side without RX_FLAG_DECRYPTED flag to use software CCMP for management frames (but hardware for data frames). Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/wpa.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 53e11e6ff66..9101b48ec2a 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -367,9 +367,14 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
int hdrlen, len, tail;
u8 *pos, *pn;
int i;
+ bool skip_hw;
+
+ skip_hw = (tx->key->conf.flags & IEEE80211_KEY_FLAG_SW_MGMT) &&
+ ieee80211_is_mgmt(hdr->frame_control);
if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
- !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
+ !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
+ !skip_hw) {
/* hwaccel - with no need for preallocated room for CCMP
* header or MIC fields */
info->control.hw_key = &tx->key->conf;
@@ -404,7 +409,7 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
ccmp_pn2hdr(pos, pn, key->conf.keyidx);
- if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
+ if ((key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) && !skip_hw) {
/* hwaccel - with preallocated room for CCMP header */
info->control.hw_key = &tx->key->conf;
return 0;