lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] mac80211: consolidate decryption

Browse Source 
Currently, we run through all three crypto algorithms for each
received frame even though we have previously determined which
key we have and as such already know which algorithm will be
used. Change it to invoke only the needed function. Also move
the WEP decrypt handler to wep.c so that fewer functions need
to be non-static.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2007-09-26 15:19:40 +02:00
committed by David S. Miller
parent b2e7771e55
commit 4f0d18e26f
5 changed files with 55 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
net/mac80211/wpa.c
View File

@ -281,7 +281,7 @@ ieee80211_tx_h_tkip_encrypt(struct ieee80211_txrx_data *tx)
ieee80211_txrx_result
ieee80211_rx_h_tkip_decrypt(struct ieee80211_txrx_data *rx)
ieee80211_crypto_tkip_decrypt(struct ieee80211_txrx_data *rx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
u16 fc;
@ -293,9 +293,7 @@ ieee80211_rx_h_tkip_decrypt(struct ieee80211_txrx_data *rx)
fc = le16_to_cpu(hdr->frame_control);
hdrlen = ieee80211_get_hdrlen(fc);
if (!rx->key || rx->key->conf.alg != ALG_TKIP ||
!(rx->fc & IEEE80211_FCTL_PROTECTED) ||
(rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
return TXRX_CONTINUE;
if (!rx->sta || skb->len - hdrlen < 12)
@ -535,7 +533,7 @@ ieee80211_tx_h_ccmp_encrypt(struct ieee80211_txrx_data *tx)
ieee80211_txrx_result
ieee80211_rx_h_ccmp_decrypt(struct ieee80211_txrx_data *rx)
ieee80211_crypto_ccmp_decrypt(struct ieee80211_txrx_data *rx)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
u16 fc;
@ -549,9 +547,7 @@ ieee80211_rx_h_ccmp_decrypt(struct ieee80211_txrx_data *rx)
fc = le16_to_cpu(hdr->frame_control);
hdrlen = ieee80211_get_hdrlen(fc);
if (!key || key->conf.alg != ALG_CCMP ||
!(rx->fc & IEEE80211_FCTL_PROTECTED) ||
(rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
return TXRX_CONTINUE;
data_len = skb->len - hdrlen - CCMP_HDR_LEN - CCMP_MIC_LEN;