From c071dcb2802a0349b05817010000082c6c105453 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Fri, 23 May 2014 11:33:18 +0300 Subject: [PATCH] ath10k: fix protected flag stripping This prevents protected flag being stripped from undecrypted raw sniffed frames when monitor interface is active. Reported-by: Chun-Yeow Yeoh Tested-by: Chun-Yeow Yeoh Signed-off-by: Michal Kazior Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/htt_rx.c | 33 +++++++++++++++++------- 1 file changed, 24 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c index f744e355c70a..08b5718cdbf1 100644 --- a/drivers/net/wireless/ath/ath10k/htt_rx.c +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c @@ -778,17 +778,30 @@ static void ath10k_htt_rx_h_rates(struct ath10k *ar, static void ath10k_htt_rx_h_protected(struct ath10k_htt *htt, struct ieee80211_rx_status *rx_status, struct sk_buff *skb, - enum htt_rx_mpdu_encrypt_type enctype) + enum htt_rx_mpdu_encrypt_type enctype, + enum rx_msdu_decap_format fmt, + bool dot11frag) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + rx_status->flag &= ~(RX_FLAG_DECRYPTED | + RX_FLAG_IV_STRIPPED | + RX_FLAG_MMIC_STRIPPED); - if (enctype == HTT_RX_MPDU_ENCRYPT_NONE) { - rx_status->flag &= ~(RX_FLAG_DECRYPTED | - RX_FLAG_IV_STRIPPED | - RX_FLAG_MMIC_STRIPPED); + if (enctype == HTT_RX_MPDU_ENCRYPT_NONE) + return; + + /* + * There's no explicit rx descriptor flag to indicate whether a given + * frame has been decrypted or not. We're forced to use the decap + * format as an implicit indication. However fragmentation rx is always + * raw and it probably never reports undecrypted raws. + * + * This makes sure sniffed frames are reported as-is without stripping + * the protected flag. + */ + if (fmt == RX_MSDU_DECAP_RAW && !dot11frag) return; - } rx_status->flag |= RX_FLAG_DECRYPTED | RX_FLAG_IV_STRIPPED | @@ -942,7 +955,8 @@ static void ath10k_htt_rx_amsdu(struct ath10k_htt *htt, } skb_in = skb; - ath10k_htt_rx_h_protected(htt, rx_status, skb_in, enctype); + ath10k_htt_rx_h_protected(htt, rx_status, skb_in, enctype, fmt, + false); skb = skb->next; skb_in->next = NULL; @@ -1024,7 +1038,7 @@ static void ath10k_htt_rx_msdu(struct ath10k_htt *htt, break; } - ath10k_htt_rx_h_protected(htt, rx_status, skb, enctype); + ath10k_htt_rx_h_protected(htt, rx_status, skb, enctype, fmt, false); ath10k_process_rx(htt->ar, rx_status, skb); } @@ -1330,7 +1344,8 @@ static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt, enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0), RX_MPDU_START_INFO0_ENCRYPT_TYPE); - ath10k_htt_rx_h_protected(htt, rx_status, msdu_head, enctype); + ath10k_htt_rx_h_protected(htt, rx_status, msdu_head, enctype, fmt, + true); msdu_head->ip_summed = ath10k_htt_rx_get_csum_state(msdu_head); if (tkip_mic_err) -- 2.20.1