mirror of https://github.com/hak5/openwrt.git
74 lines
2.4 KiB
Diff
74 lines
2.4 KiB
Diff
--- a/drivers/net/wireless/ath/ath9k/recv.c
|
|
+++ b/drivers/net/wireless/ath/ath9k/recv.c
|
|
@@ -814,16 +814,17 @@ static bool ath9k_rx_accept(struct ath_c
|
|
struct ath_rx_status *rx_stats,
|
|
bool *decrypt_error)
|
|
{
|
|
-#define is_mc_or_valid_tkip_keyix ((is_mc || \
|
|
- (rx_stats->rs_keyix != ATH9K_RXKEYIX_INVALID && \
|
|
- test_bit(rx_stats->rs_keyix, common->tkip_keymap))))
|
|
-
|
|
+ bool is_mc, is_valid_tkip, mic_error = false;
|
|
struct ath_hw *ah = common->ah;
|
|
__le16 fc;
|
|
u8 rx_status_len = ah->caps.rx_status_len;
|
|
|
|
fc = hdr->frame_control;
|
|
|
|
+ is_mc = !!is_multicast_ether_addr(hdr->addr1);
|
|
+ is_valid_tkip = rx_stats->rs_keyix != ATH9K_RXKEYIX_INVALID &&
|
|
+ test_bit(rx_stats->rs_keyix, common->tkip_keymap);
|
|
+
|
|
if (!rx_stats->rs_datalen)
|
|
return false;
|
|
/*
|
|
@@ -853,19 +854,19 @@ static bool ath9k_rx_accept(struct ath_c
|
|
if (rx_stats->rs_status & ATH9K_RXERR_DECRYPT) {
|
|
*decrypt_error = true;
|
|
} else if (rx_stats->rs_status & ATH9K_RXERR_MIC) {
|
|
- bool is_mc;
|
|
/*
|
|
* The MIC error bit is only valid if the frame
|
|
* is not a control frame or fragment, and it was
|
|
- * decrypted using a valid TKIP key.
|
|
+ * decrypted using a valid TKIP key. For multicast
|
|
+ * frames the hardware will not return a valid
|
|
+ * key index, so accept the MIC bit for those
|
|
+ * as well.
|
|
*/
|
|
- is_mc = !!is_multicast_ether_addr(hdr->addr1);
|
|
-
|
|
if (!ieee80211_is_ctl(fc) &&
|
|
!ieee80211_has_morefrags(fc) &&
|
|
!(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG) &&
|
|
- is_mc_or_valid_tkip_keyix)
|
|
- rxs->flag |= RX_FLAG_MMIC_ERROR;
|
|
+ (is_mc || is_valid_tkip))
|
|
+ mic_error = true;
|
|
else
|
|
rx_stats->rs_status &= ~ATH9K_RXERR_MIC;
|
|
}
|
|
@@ -886,6 +887,22 @@ static bool ath9k_rx_accept(struct ath_c
|
|
}
|
|
}
|
|
}
|
|
+
|
|
+ /*
|
|
+ * For unicast frames the MIC error bit can have false positives,
|
|
+ * so all MIC error reports need to be validated in software.
|
|
+ * False negatives are not common, so skip software verification
|
|
+ * if the hardware considers the MIC valid.
|
|
+ */
|
|
+ if (is_valid_tkip && ieee80211_is_data_present(hdr->frame_control) &&
|
|
+ !(rx_stats->rs_status & (ATH9K_RXERR_DECRYPT | ATH9K_RXERR_CRC |
|
|
+ ATH9K_RXERR_MIC))) {
|
|
+ /* Strip the Michael MIC */
|
|
+ rx_stats->rs_datalen -= 8;
|
|
+ rxs->flag |= RX_FLAG_MMIC_STRIPPED;
|
|
+ } else if (is_mc && mic_error) {
|
|
+ rxs->flag |= RX_FLAG_MMIC_ERROR;
|
|
+ }
|
|
return true;
|
|
}
|
|
|