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authorJouni Malinen <jouni.malinen@atheros.com>2010-06-11 10:27:33 -0700
committerJohn W. Linville <linville@tuxdriver.com>2010-06-15 16:00:49 -0400
commit9190252c952a33efa1ceff4ef35188f8a27b81cb (patch)
treef6c7473c919e7a3f0ff7c1b6543da44f8c338d02 /net/mac80211/rx.c
parent05e48e8e437148298f4673e1efe81f9ead5f41d7 (diff)
mac80211: Use a separate CCMP PN receive counter for management frames
When management frame protection (IEEE 802.11w) is used, we must use a separate counter for tracking received CCMP packet number for the management frames. The previously used NUM_RX_DATA_QUEUESth queue was shared with data frames when QoS was not used and that can cause problems in detecting replays incorrectly for robust management frames. Add a new counter just for robust management frames to avoid this issue. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/rx.c')
-rw-r--r--net/mac80211/rx.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 1594ebe80a4f..1f76352caa9e 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1267,11 +1267,13 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
rx->queue, &(rx->skb));
if (rx->key && rx->key->conf.alg == ALG_CCMP &&
ieee80211_has_protected(fc)) {
+ int queue = ieee80211_is_mgmt(fc) ?
+ NUM_RX_DATA_QUEUES : rx->queue;
/* Store CCMP PN so that we can verify that the next
* fragment has a sequential PN value. */
entry->ccmp = 1;
memcpy(entry->last_pn,
- rx->key->u.ccmp.rx_pn[rx->queue],
+ rx->key->u.ccmp.rx_pn[queue],
CCMP_PN_LEN);
}
return RX_QUEUED;
@@ -1291,6 +1293,7 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
if (entry->ccmp) {
int i;
u8 pn[CCMP_PN_LEN], *rpn;
+ int queue;
if (!rx->key || rx->key->conf.alg != ALG_CCMP)
return RX_DROP_UNUSABLE;
memcpy(pn, entry->last_pn, CCMP_PN_LEN);
@@ -1299,7 +1302,9 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
if (pn[i])
break;
}
- rpn = rx->key->u.ccmp.rx_pn[rx->queue];
+ queue = ieee80211_is_mgmt(fc) ?
+ NUM_RX_DATA_QUEUES : rx->queue;
+ rpn = rx->key->u.ccmp.rx_pn[queue];
if (memcmp(pn, rpn, CCMP_PN_LEN))
return RX_DROP_UNUSABLE;
memcpy(entry->last_pn, pn, CCMP_PN_LEN);