diff options
| author | Arik Nemtsov <arik@wizery.com> | 2011-10-23 08:21:41 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-11-08 15:54:27 -0500 |
| commit | 077a9154898b374f20555adc3f620cccd02581d6 (patch) | |
| tree | 77549521a0633899874a2b7f694f240cd7e61414 /net/mac80211/wpa.c | |
| parent | 3b7b72eed19684824806b3fbefef653a180ef2b0 (diff) | |
| download | lwn-077a9154898b374f20555adc3f620cccd02581d6.tar.gz lwn-077a9154898b374f20555adc3f620cccd02581d6.zip | |
mac80211: support adding IV-room in the skb for CCMP keys
Some cards can generate CCMP IVs in HW, but require the space for the IV
to be pre-allocated in the frame at the correct offset. Add a key flag
that allows us to achieve this.
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/wpa.c')
| -rw-r--r-- | net/mac80211/wpa.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index f614ce7bb6e3..13efab5bf12a 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -390,7 +390,8 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) u8 scratch[6 * AES_BLOCK_SIZE]; if (info->control.hw_key && - !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV)) { + !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) && + !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) { /* * hwaccel has no need for preallocated room for CCMP * header or MIC fields @@ -412,6 +413,11 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) pos = skb_push(skb, CCMP_HDR_LEN); memmove(pos, pos + CCMP_HDR_LEN, hdrlen); + + /* the HW only needs room for the IV, but not the actual IV */ + if (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) + return 0; + hdr = (struct ieee80211_hdr *) pos; pos += hdrlen; |