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authorGrzegorz Bajorski <grzegorz.bajorski@tieto.com>2015-11-30 13:56:59 +0100
committerKalle Valo <kvalo@qca.qualcomm.com>2016-03-08 10:25:54 +0100
commit60549cab2ea5ffa100076cb06d49579e05edd966 (patch)
tree5626b2a8d81d78497b7ae231d247be3204fb9721
parentwil6210: add oob_mode module parameter (diff)
downloadlinux-60549cab2ea5ffa100076cb06d49579e05edd966.tar.xz
linux-60549cab2ea5ffa100076cb06d49579e05edd966.zip
ath10k: deliver mgmt frames from htt to monitor vifs only
Until now only WMI originating mgmt frames were reported to mac80211. Management frames on HTT were basically dropped (except frames which looked like management but had FCS error). To allow sniffing all frames (including offloaded frames) without interfering with mac80211 operation and states a new rx_flag was introduced and is not being used to distinguish frames and classify them for mac80211. Signed-off-by: Grzegorz Bajorski <grzegorz.bajorski@tieto.com> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
-rw-r--r--drivers/net/wireless/ath/ath10k/htt_rx.c70
-rw-r--r--drivers/net/wireless/ath/ath10k/wmi.c6
2 files changed, 40 insertions, 36 deletions
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 40f969c72de8..84b060efa1b5 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -1078,20 +1078,25 @@ static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
hdr = (void *)msdu->data;
/* Tail */
- skb_trim(msdu, msdu->len - ath10k_htt_rx_crypto_tail_len(ar, enctype));
+ if (status->flag & RX_FLAG_IV_STRIPPED)
+ skb_trim(msdu, msdu->len -
+ ath10k_htt_rx_crypto_tail_len(ar, enctype));
/* MMIC */
- if (!ieee80211_has_morefrags(hdr->frame_control) &&
+ if ((status->flag & RX_FLAG_MMIC_STRIPPED) &&
+ !ieee80211_has_morefrags(hdr->frame_control) &&
enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
skb_trim(msdu, msdu->len - 8);
/* Head */
- hdr_len = ieee80211_hdrlen(hdr->frame_control);
- crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
+ if (status->flag & RX_FLAG_IV_STRIPPED) {
+ hdr_len = ieee80211_hdrlen(hdr->frame_control);
+ crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
- memmove((void *)msdu->data + crypto_len,
- (void *)msdu->data, hdr_len);
- skb_pull(msdu, crypto_len);
+ memmove((void *)msdu->data + crypto_len,
+ (void *)msdu->data, hdr_len);
+ skb_pull(msdu, crypto_len);
+ }
}
static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
@@ -1345,6 +1350,7 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
bool has_tkip_err;
bool has_peer_idx_invalid;
bool is_decrypted;
+ bool is_mgmt;
u32 attention;
if (skb_queue_empty(amsdu))
@@ -1353,6 +1359,9 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
first = skb_peek(amsdu);
rxd = (void *)first->data - sizeof(*rxd);
+ is_mgmt = !!(rxd->attention.flags &
+ __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
+
enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
RX_MPDU_START_INFO0_ENCRYPT_TYPE);
@@ -1394,6 +1403,7 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
RX_FLAG_MMIC_ERROR |
RX_FLAG_DECRYPTED |
RX_FLAG_IV_STRIPPED |
+ RX_FLAG_ONLY_MONITOR |
RX_FLAG_MMIC_STRIPPED);
if (has_fcs_err)
@@ -1402,10 +1412,21 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
if (has_tkip_err)
status->flag |= RX_FLAG_MMIC_ERROR;
- if (is_decrypted)
- status->flag |= RX_FLAG_DECRYPTED |
- RX_FLAG_IV_STRIPPED |
- RX_FLAG_MMIC_STRIPPED;
+ /* Firmware reports all necessary management frames via WMI already.
+ * They are not reported to monitor interfaces at all so pass the ones
+ * coming via HTT to monitor interfaces instead. This simplifies
+ * matters a lot.
+ */
+ if (is_mgmt)
+ status->flag |= RX_FLAG_ONLY_MONITOR;
+
+ if (is_decrypted) {
+ status->flag |= RX_FLAG_DECRYPTED;
+
+ if (likely(!is_mgmt))
+ status->flag |= RX_FLAG_IV_STRIPPED |
+ RX_FLAG_MMIC_STRIPPED;
+}
skb_queue_walk(amsdu, msdu) {
ath10k_htt_rx_h_csum_offload(msdu);
@@ -1418,6 +1439,8 @@ static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
*/
if (!is_decrypted)
continue;
+ if (is_mgmt)
+ continue;
hdr = (void *)msdu->data;
hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
@@ -1518,14 +1541,6 @@ static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
struct sk_buff_head *amsdu,
struct ieee80211_rx_status *rx_status)
{
- struct sk_buff *msdu;
- struct htt_rx_desc *rxd;
- bool is_mgmt;
- bool has_fcs_err;
-
- msdu = skb_peek(amsdu);
- rxd = (void *)msdu->data - sizeof(*rxd);
-
/* FIXME: It might be a good idea to do some fuzzy-testing to drop
* invalid/dangerous frames.
*/
@@ -1535,23 +1550,6 @@ static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
return false;
}
- is_mgmt = !!(rxd->attention.flags &
- __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
- has_fcs_err = !!(rxd->attention.flags &
- __cpu_to_le32(RX_ATTENTION_FLAGS_FCS_ERR));
-
- /* Management frames are handled via WMI events. The pros of such
- * approach is that channel is explicitly provided in WMI events
- * whereas HTT doesn't provide channel information for Rxed frames.
- *
- * However some firmware revisions don't report corrupted frames via
- * WMI so don't drop them.
- */
- if (is_mgmt && !has_fcs_err) {
- ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n");
- return false;
- }
-
if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
return false;
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index c31b4878cdc6..651220e98c72 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -2310,6 +2310,12 @@ int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
hdr = (struct ieee80211_hdr *)skb->data;
fc = le16_to_cpu(hdr->frame_control);
+ /* Firmware is guaranteed to report all essential management frames via
+ * WMI while it can deliver some extra via HTT. Since there can be
+ * duplicates split the reporting wrt monitor/sniffing.
+ */
+ status->flag |= RX_FLAG_SKIP_MONITOR;
+
ath10k_wmi_handle_wep_reauth(ar, skb, status);
/* FW delivers WEP Shared Auth frame with Protected Bit set and