[PATCH 0/5] staging: r8188eu: clean up OnDisassoc

[PATCH 0/5] staging: r8188eu: clean up OnDisassoc

[Martin Kaiser]

Clean up the OnDisassoc function. Use a struct ieee80211_mgmt for parsing
the incoming message and reduce the indentation levels.

Please apply this after the two series I sent some days ago

Martin Kaiser (5):
  staging: r8188eu: use ieee80211_mgmt to parse addresses
  staging: r8188eu: read reason code from ieee80211_mgmt
  staging: r8188eu: move bBusyTraffic update
  staging: r8188eu: handle the non-ap case first
  staging: r8188eu: simplify err handling for unknown station

 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 47 ++++++++++-----------
 1 file changed, 22 insertions(+), 25 deletions(-)

-- 
2.30.2

[PATCH 1/5] staging: r8188eu: use ieee80211_mgmt to parse addresses

[Martin Kaiser]

Define a struct ieee80211_mgmt in the OnDisassoc function and use it to
parse the addresses in the incoming disassoc message. This replaces some
driver-specific functions for address parsing.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index d32b2d569e23..b2b2cb57ed04 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -1427,6 +1427,7 @@ static void OnDeAuth(struct adapter *padapter, struct recv_frame *precv_frame)
 
 static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 {
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)precv_frame->rx_data;
 	u16 reason;
 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 	struct mlme_ext_priv	*pmlmeext = &padapter->mlmeextpriv;
@@ -1434,8 +1435,7 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 	u8 *pframe = precv_frame->rx_data;
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
-	/* check A3 */
-	if (!(!memcmp(GetAddr3Ptr(pframe), get_my_bssid(&pmlmeinfo->network), ETH_ALEN)))
+	if (memcmp(mgmt->bssid, get_my_bssid(&pmlmeinfo->network), ETH_ALEN))
 		return;
 
 	if (pwdinfo->rx_invitereq_info.scan_op_ch_only) {
@@ -1449,7 +1449,7 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 		struct sta_info *psta;
 		struct sta_priv *pstapriv = &padapter->stapriv;
 
-		psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
+		psta = rtw_get_stainfo(pstapriv, mgmt->sa);
 		if (psta) {
 			u8 updated = 0;
 
@@ -1466,7 +1466,7 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 
 		return;
 	} else {
-		receive_disconnect(padapter, GetAddr3Ptr(pframe), reason);
+		receive_disconnect(padapter, mgmt->bssid, reason);
 	}
 	pmlmepriv->LinkDetectInfo.bBusyTraffic = false;
 }
-- 
2.30.2

[PATCH 2/5] staging: r8188eu: read reason code from ieee80211_mgmt

[Martin Kaiser]

Use the struct ieee80211_mgmt to read the reason code instead of parsing
the message manually.

Remove the pframe pointer, it's no longer used.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index b2b2cb57ed04..fe58d4e3e260 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -1432,7 +1432,6 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 	struct mlme_ext_priv	*pmlmeext = &padapter->mlmeextpriv;
 	struct mlme_ext_info	*pmlmeinfo = &pmlmeext->mlmext_info;
-	u8 *pframe = precv_frame->rx_data;
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
 	if (memcmp(mgmt->bssid, get_my_bssid(&pmlmeinfo->network), ETH_ALEN))
@@ -1443,7 +1442,7 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 		_set_timer(&pwdinfo->reset_ch_sitesurvey, 10);
 	}
 
-	reason = le16_to_cpu(*(__le16 *)(pframe + WLAN_HDR_A3_LEN));
+	reason = le16_to_cpu(mgmt->u.disassoc.reason_code);
 
 	if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 		struct sta_info *psta;
-- 
2.30.2

[PATCH 3/5] staging: r8188eu: move bBusyTraffic update

[Martin Kaiser]

Move the update of bBusyTraffic into the else branch. The if branch ends
with a return statement, so bBusyTraffic will not be updated in this case.

With this change in place, we can reorder the code and save some levels of
indentation.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index fe58d4e3e260..dd1e0b4fc5a0 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -1466,8 +1466,8 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 		return;
 	} else {
 		receive_disconnect(padapter, mgmt->bssid, reason);
+		pmlmepriv->LinkDetectInfo.bBusyTraffic = false;
 	}
-	pmlmepriv->LinkDetectInfo.bBusyTraffic = false;
 }
 
 static void OnAction_back(struct adapter *padapter, struct recv_frame *precv_frame)
-- 
2.30.2

[PATCH 4/5] staging: r8188eu: handle the non-ap case first

[Martin Kaiser]

The OnDisassoc function hasn't got much to do if we're not working as an
access point. Move this case out of the large if statement to simplify the
code.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 36 ++++++++++-----------
 1 file changed, 17 insertions(+), 19 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index dd1e0b4fc5a0..d5c9eb52fb0e 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -1433,6 +1433,8 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 	struct mlme_ext_priv	*pmlmeext = &padapter->mlmeextpriv;
 	struct mlme_ext_info	*pmlmeinfo = &pmlmeext->mlmext_info;
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
+	struct sta_info *psta;
+	struct sta_priv *pstapriv = &padapter->stapriv;
 
 	if (memcmp(mgmt->bssid, get_my_bssid(&pmlmeinfo->network), ETH_ALEN))
 		return;
@@ -1444,29 +1446,25 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 
 	reason = le16_to_cpu(mgmt->u.disassoc.reason_code);
 
-	if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
-		struct sta_info *psta;
-		struct sta_priv *pstapriv = &padapter->stapriv;
-
-		psta = rtw_get_stainfo(pstapriv, mgmt->sa);
-		if (psta) {
-			u8 updated = 0;
+	if (!check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
+		receive_disconnect(padapter, mgmt->bssid, reason);
+		pmlmepriv->LinkDetectInfo.bBusyTraffic = false;
+		return;
+	}
 
-			spin_lock_bh(&pstapriv->asoc_list_lock);
-			if (!list_empty(&psta->asoc_list)) {
-				list_del_init(&psta->asoc_list);
-				pstapriv->asoc_list_cnt--;
-				updated = ap_free_sta(padapter, psta, false, reason);
-			}
-			spin_unlock_bh(&pstapriv->asoc_list_lock);
+	psta = rtw_get_stainfo(pstapriv, mgmt->sa);
+	if (psta) {
+		u8 updated = 0;
 
-			associated_clients_update(padapter, updated);
+		spin_lock_bh(&pstapriv->asoc_list_lock);
+		if (!list_empty(&psta->asoc_list)) {
+			list_del_init(&psta->asoc_list);
+			pstapriv->asoc_list_cnt--;
+			updated = ap_free_sta(padapter, psta, false, reason);
 		}
+		spin_unlock_bh(&pstapriv->asoc_list_lock);
 
-		return;
-	} else {
-		receive_disconnect(padapter, mgmt->bssid, reason);
-		pmlmepriv->LinkDetectInfo.bBusyTraffic = false;
+		associated_clients_update(padapter, updated);
 	}
 }
 
-- 
2.30.2

[PATCH 5/5] staging: r8188eu: simplify err handling for unknown station

[Martin Kaiser]

If we receive a disassoc message from an unknown station, we can drop this
message immediately. Reorder the code to make this clearer.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 22 ++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index d5c9eb52fb0e..49e0b50b1243 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -1435,6 +1435,7 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 	struct sta_info *psta;
 	struct sta_priv *pstapriv = &padapter->stapriv;
+	u8 updated = 0;
 
 	if (memcmp(mgmt->bssid, get_my_bssid(&pmlmeinfo->network), ETH_ALEN))
 		return;
@@ -1453,19 +1454,18 @@ static void OnDisassoc(struct adapter *padapter, struct recv_frame *precv_frame)
 	}
 
 	psta = rtw_get_stainfo(pstapriv, mgmt->sa);
-	if (psta) {
-		u8 updated = 0;
-
-		spin_lock_bh(&pstapriv->asoc_list_lock);
-		if (!list_empty(&psta->asoc_list)) {
-			list_del_init(&psta->asoc_list);
-			pstapriv->asoc_list_cnt--;
-			updated = ap_free_sta(padapter, psta, false, reason);
-		}
-		spin_unlock_bh(&pstapriv->asoc_list_lock);
+	if (!psta)
+		return;
 
-		associated_clients_update(padapter, updated);
+	spin_lock_bh(&pstapriv->asoc_list_lock);
+	if (!list_empty(&psta->asoc_list)) {
+		list_del_init(&psta->asoc_list);
+		pstapriv->asoc_list_cnt--;
+		updated = ap_free_sta(padapter, psta, false, reason);
 	}
+	spin_unlock_bh(&pstapriv->asoc_list_lock);
+
+	associated_clients_update(padapter, updated);
 }
 
 static void OnAction_back(struct adapter *padapter, struct recv_frame *precv_frame)
-- 
2.30.2

Re: [PATCH 0/5] staging: r8188eu: clean up OnDisassoc

[Philipp Hortmann]

On 11/29/22 21:51, Martin Kaiser wrote:
> Clean up the OnDisassoc function. Use a struct ieee80211_mgmt for parsing
> the incoming message and reduce the indentation levels.
> 
> Please apply this after the two series I sent some days ago
> 
> Martin Kaiser (5):
>    staging: r8188eu: use ieee80211_mgmt to parse addresses
>    staging: r8188eu: read reason code from ieee80211_mgmt
>    staging: r8188eu: move bBusyTraffic update
>    staging: r8188eu: handle the non-ap case first
>    staging: r8188eu: simplify err handling for unknown station
> 
>   drivers/staging/r8188eu/core/rtw_mlme_ext.c | 47 ++++++++++-----------
>   1 file changed, 22 insertions(+), 25 deletions(-)
> 
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150