From 12da401e0d616f738c8b8a368d1f63f365cc78e4 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Mon, 19 Jan 2009 16:08:48 +0100 Subject: [PATCH] p54: more cryptographic accelerator fixes If we let the firmware do the data encryption, we have to remove the ICV and (M)MIC at the end of the frame before we can give it back to mac80211. Or, these data frames have a few trailing bytes on cooked monitor interfaces. Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/p54/p54common.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c index 61b01930d9aa..34561e6e816b 100644 --- a/drivers/net/wireless/p54/p54common.c +++ b/drivers/net/wireless/p54/p54common.c @@ -745,7 +745,7 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry); struct p54_hdr *entry_hdr; struct p54_tx_data *entry_data; - int pad = 0; + unsigned int pad = 0, frame_len; range = (void *)info->rate_driver_data; if (range->start_addr != addr) { @@ -768,6 +768,7 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) __skb_unlink(entry, &priv->tx_queue); spin_unlock_irqrestore(&priv->tx_queue.lock, flags); + frame_len = entry->len; entry_hdr = (struct p54_hdr *) entry->data; entry_data = (struct p54_tx_data *) entry_hdr->data; priv->tx_stats[entry_data->hw_queue].len--; @@ -814,15 +815,28 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) info->status.ack_signal = p54_rssi_to_dbm(dev, (int)payload->ack_rssi); - if (entry_data->key_type == P54_CRYPTO_TKIPMICHAEL) { + /* Undo all changes to the frame. */ + switch (entry_data->key_type) { + case P54_CRYPTO_TKIPMICHAEL: { u8 *iv = (u8 *)(entry_data->align + pad + - entry_data->crypt_offset); + entry_data->crypt_offset); /* Restore the original TKIP IV. */ iv[2] = iv[0]; iv[0] = iv[1]; iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */ + + frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */ + break; + } + case P54_CRYPTO_AESCCMP: + frame_len -= 8; /* remove CCMP_MIC */ + break; + case P54_CRYPTO_WEP: + frame_len -= 4; /* remove WEP_ICV */ + break; } + skb_trim(entry, frame_len); skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data)); ieee80211_tx_status_irqsafe(dev, entry); goto out; -- 2.20.1