From eeab266c0f3c9c85ef649ba737e2d553742a2532 Mon Sep 17 00:00:00 2001 From: Marek Kwaczynski Date: Wed, 14 May 2014 16:56:17 +0300 Subject: [PATCH] ath10k: fix pmf for action frames Fix sending and receiveing protected managment frames. Lack of protected flag for received protected action frames causes report these frames as unprotected robust action frames. If the driver in AP mode sent frame with protected flag and CCMP header using IEEE80211_KEY_FLAG_SW_MGMT_TX flag, the FW encrypted frames once again. From user side all received SA Query Requests and Responses were skipped and all protected action frames were sent as malformed packets. Signed-off-by: Marek Kwaczynski Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/mac.c | 5 ++++- drivers/net/wireless/ath/ath10k/wmi.c | 24 ++++++++++++++++++++---- 2 files changed, 24 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 7026f021ccb..12518047bd3 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -54,7 +54,10 @@ static int ath10k_send_key(struct ath10k_vif *arvif, switch (key->cipher) { case WLAN_CIPHER_SUITE_CCMP: arg.key_cipher = WMI_CIPHER_AES_CCM; - key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; + if (arvif->vdev_type == WMI_VDEV_TYPE_AP) + key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV_MGMT; + else + key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; break; case WLAN_CIPHER_SUITE_TKIP: arg.key_cipher = WMI_CIPHER_TKIP; diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c index 72cc4f20d10..e355d5e4928 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -639,6 +639,7 @@ int ath10k_wmi_mgmt_tx(struct ath10k *ar, struct sk_buff *skb) struct sk_buff *wmi_skb; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); int len; + u32 buf_len = skb->len; u16 fc; hdr = (struct ieee80211_hdr *)skb->data; @@ -648,6 +649,15 @@ int ath10k_wmi_mgmt_tx(struct ath10k *ar, struct sk_buff *skb) return -EINVAL; len = sizeof(cmd->hdr) + skb->len; + + if ((ieee80211_is_action(hdr->frame_control) || + ieee80211_is_deauth(hdr->frame_control) || + ieee80211_is_disassoc(hdr->frame_control)) && + ieee80211_has_protected(hdr->frame_control)) { + len += IEEE80211_CCMP_MIC_LEN; + buf_len += IEEE80211_CCMP_MIC_LEN; + } + len = round_up(len, 4); wmi_skb = ath10k_wmi_alloc_skb(len); @@ -659,7 +669,7 @@ int ath10k_wmi_mgmt_tx(struct ath10k *ar, struct sk_buff *skb) cmd->hdr.vdev_id = __cpu_to_le32(ATH10K_SKB_CB(skb)->vdev_id); cmd->hdr.tx_rate = 0; cmd->hdr.tx_power = 0; - cmd->hdr.buf_len = __cpu_to_le32((u32)(skb->len)); + cmd->hdr.buf_len = __cpu_to_le32(buf_len); memcpy(cmd->hdr.peer_macaddr.addr, ieee80211_get_DA(hdr), ETH_ALEN); memcpy(cmd->buf, skb->data, skb->len); @@ -957,10 +967,16 @@ static int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb) * frames with Protected Bit set. */ if (ieee80211_has_protected(hdr->frame_control) && !ieee80211_is_auth(hdr->frame_control)) { - status->flag |= RX_FLAG_DECRYPTED | RX_FLAG_IV_STRIPPED | - RX_FLAG_MMIC_STRIPPED; - hdr->frame_control = __cpu_to_le16(fc & + status->flag |= RX_FLAG_DECRYPTED; + + if (!ieee80211_is_action(hdr->frame_control) && + !ieee80211_is_deauth(hdr->frame_control) && + !ieee80211_is_disassoc(hdr->frame_control)) { + status->flag |= RX_FLAG_IV_STRIPPED | + RX_FLAG_MMIC_STRIPPED; + hdr->frame_control = __cpu_to_le16(fc & ~IEEE80211_FCTL_PROTECTED); + } } ath10k_dbg(ATH10K_DBG_MGMT, -- 2.46.0