RSN capability field of RSN IE which is generated (which is what really
advertised in beacon/probe response) differs from the one generated in
wpa_supplicant. This inconsistency in rsn IE results in 4-way handshake
failure. To fix this, configure rsn capability used in wpa_supplicant
in firmware using a new wmi command, WMI_SET_IE_CMDID. There is a bit
(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE) in fw_capabilities to advertise
this support to driver.
Signed-off-by: Subramania Sharma <sharmat@xxxxxxxxxxxxxxxx>
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@xxxxxxxxxxxxxxxx>
---
V2 - Fix sparse warning due to the way rsn_cap is used
to store le16 (Reported by Kalle).
drivers/net/wireless/ath/ath6kl/cfg80211.c | 64 ++++++++++++++++++++++++++++
drivers/net/wireless/ath/ath6kl/core.h | 3 +
drivers/net/wireless/ath/ath6kl/wmi.c | 23 ++++++++++
drivers/net/wireless/ath/ath6kl/wmi.h | 17 +++++++
4 files changed, 107 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 06f12da..98a0046 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -2524,6 +2524,52 @@ static int ath6kl_set_ies(struct ath6kl_vif *vif,
return 0;
}
+static int ath6kl_get_rsn_capab(struct cfg80211_beacon_data *beacon,
+ u8 *rsn_capab)
+{
+ const u8 *rsn_ie;
+ size_t rsn_ie_len;
+ u16 cnt;
+
+ if (!beacon->tail)
+ return -EINVAL;
+
+ rsn_ie = cfg80211_find_ie(WLAN_EID_RSN, beacon->tail, beacon->tail_len);
+ if (!rsn_ie)
+ return -EINVAL;
+
+ rsn_ie_len = *(rsn_ie + 1);
+ /* skip element id and length */
+ rsn_ie += 2;
+
+ /* skip version, group cipher */
+ if (rsn_ie_len < 6)
+ return -EINVAL;
+ rsn_ie += 6;
+ rsn_ie_len -= 6;
+
+ /* skip pairwise cipher suite */
+ if (rsn_ie_len < 2)
+ return -EINVAL;
+ cnt = *((u16 *) rsn_ie);
+ rsn_ie += (2 + cnt * 4);
+ rsn_ie_len -= (2 + cnt * 4);
+
+ /* skip akm suite */
+ if (rsn_ie_len < 2)
+ return -EINVAL;
+ cnt = *((u16 *) rsn_ie);
+ rsn_ie += (2 + cnt * 4);
+ rsn_ie_len -= (2 + cnt * 4);
+
+ if (rsn_ie_len < 2)
+ return -EINVAL;
+
+ memcpy(rsn_capab, rsn_ie, 2);
+
+ return 0;
+}
+
static int ath6kl_start_ap(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_ap_settings *info)
{
@@ -2536,6 +2582,7 @@ static int ath6kl_start_ap(struct wiphy *wiphy, struct net_device *dev,
struct wmi_connect_cmd p;
int res;
int i, ret;
+ u16 rsn_capab = 0;
ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "%s:\n", __func__);
@@ -2672,6 +2719,23 @@ static int ath6kl_start_ap(struct wiphy *wiphy, struct net_device *dev,
return res;
}
+ /*
+ * Get the PTKSA replay counter in the RSN IE. Supplicant
+ * will use the RSN IE in M3 message and firmware has to
+ * advertise the same in beacon/probe response. Send
+ * the complete RSN IE capability field to firmware
+ */
+ if (!ath6kl_get_rsn_capab(&info->beacon, (u8 *) &rsn_capab) &&
+ test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
+ ar->fw_capabilities)) {
+ res = ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
+ WLAN_EID_RSN, WMI_RSN_IE_CAPB,
+ (const u8 *) &rsn_capab,
+ sizeof(rsn_capab));
+ if (res < 0)
+ return res;
+ }
+
res = ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx, &p);
if (res < 0)
return res;
diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index 75b1d86..72e6a94 100644
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -97,6 +97,9 @@ enum ath6kl_fw_capability {
*/
ATH6KL_FW_CAPABILITY_INACTIVITY_TIMEOUT,
+ /* Firmware has support to override rsn cap of rsn ie */
+ ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
+
/* this needs to be last */
ATH6KL_FW_CAPABILITY_MAX,
};
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index b1b1f34..7cd1d96 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -3184,6 +3184,29 @@ int ath6kl_wmi_set_appie_cmd(struct wmi *wmi, u8 if_idx, u8 mgmt_frm_type,
NO_SYNC_WMIFLAG);
}
+int ath6kl_wmi_set_ie_cmd(struct wmi *wmi, u8 if_idx, u8 ie_id, u8 ie_field,
+ const u8 *ie_info, u8 ie_len)
+{
+ struct sk_buff *skb;
+ struct wmi_set_ie_cmd *p;
+
+ skb = ath6kl_wmi_get_new_buf(sizeof(*p) + ie_len);
+ if (!skb)
+ return -ENOMEM;
+
+ ath6kl_dbg(ATH6KL_DBG_WMI, "set_ie_cmd: ie_id=%u ie_ie_field=%u ie_len=%u\n",
+ ie_id, ie_field, ie_len);
+ p = (struct wmi_set_ie_cmd *) skb->data;
+ p->ie_id = ie_id;
+ p->ie_field = ie_field;
+ p->ie_len = ie_len;
+ if (ie_info && ie_len > 0)
+ memcpy(p->ie_info, ie_info, ie_len);
+
+ return ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_IE_CMDID,
+ NO_SYNC_WMIFLAG);
+}
+
int ath6kl_wmi_disable_11b_rates_cmd(struct wmi *wmi, bool disable)
{
struct sk_buff *skb;
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index b99e9bd..25aa6b8 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -426,6 +426,7 @@ enum wmi_cmd_id {
WMI_SET_FRAMERATES_CMDID,
WMI_SET_AP_PS_CMDID,
WMI_SET_QOS_SUPP_CMDID,
+ WMI_SET_IE_CMDID,
/* WMI_THIN_RESERVED_... mark the start and end
* values for WMI_THIN_RESERVED command IDs. These
@@ -632,6 +633,11 @@ enum wmi_mgmt_frame_type {
WMI_NUM_MGMT_FRAME
};
+enum wmi_ie_field_type {
+ WMI_RSN_IE_CAPB = 0x1,
+ WMI_IE_FULL = 0xFF, /* indicats full IE */
+};
+
/* WMI_CONNECT_CMDID */
enum network_type {
INFRA_NETWORK = 0x01,
@@ -1916,6 +1922,14 @@ struct wmi_set_appie_cmd {
u8 ie_info[0];
} __packed;
+struct wmi_set_ie_cmd {
+ u8 ie_id;
+ u8 ie_field; /* enum wmi_ie_field_type */
+ u8 ie_len;
+ u8 reserved;
+ u8 ie_info[0];
+} __packed;
+
/* Notify the WSC registration status to the target */
#define WSC_REG_ACTIVE 1
#define WSC_REG_INACTIVE 0
@@ -2523,6 +2537,9 @@ int ath6kl_wmi_set_rx_frame_format_cmd(struct wmi *wmi, u8 if_idx,
int ath6kl_wmi_set_appie_cmd(struct wmi *wmi, u8 if_idx, u8 mgmt_frm_type,
const u8 *ie, u8 ie_len);
+int ath6kl_wmi_set_ie_cmd(struct wmi *wmi, u8 if_idx, u8 ie_id, u8 ie_field,
+ const u8 *ie_info, u8 ie_len);
+
/* P2P */
int ath6kl_wmi_disable_11b_rates_cmd(struct wmi *wmi, bool disable);
--
1.7.0.4
--
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