qcacmn: Add support to drop beacon if channel mismatch

Add support to drop beacon, probe response frames if frame
receipt channel and channel mentioned in IEs dont match.

Change-Id: Ib545f125dc53ccfb21abf6bdcb94a327ecde5a0a
CRs-Fixed: 2149224

umac/scan/core/src/wlan_scan_cache_db.c

@@ -694,6 +694,20 @@ QDF_STATUS scm_handle_bcn_probe(struct scheduler_msg *msg)
 
 		scan_entry = scan_node->entry;
 
+		if (scan_obj->drop_bcn_on_chan_mismatch &&
+			scan_entry->channel_mismatch) {
+			scm_debug("Channel mismatch: Received %s from BSSID: %pM "
+				"tsf_delta = %u Seq Num: %x ssid:%.*s, rssi: %d",
+				(bcn->frm_type == MGMT_SUBTYPE_PROBE_RESP) ?
+				"Probe Rsp" : "Beacon", scan_entry->bssid.bytes,
+				scan_entry->tsf_delta, scan_entry->seq_num,
+				scan_entry->ssid.length, scan_entry->ssid.ssid,
+				scan_entry->rssi_raw);
+			util_scan_free_cache_entry(scan_entry);
+			qdf_mem_free(scan_node);
+			continue;
+		}
+
 		if (scan_obj->cb.update_beacon)
 			scan_obj->cb.update_beacon(pdev, scan_entry);
 

umac/scan/core/src/wlan_scan_main.h

@@ -436,6 +436,7 @@ struct scan_cb {
  * @bt_a2dp_enabled: if bt a2dp is enabled
  * @miracast_enabled: miracast enabled
  * @disable_timeout: command timeout disabled
+ * @drop_bcn_on_chan_mismatch: drop bcn if channel mismatch
  * @scan_start_request_buff: buffer used to pass
  *      scan config to event handlers
  */
@@ -455,6 +456,7 @@ struct wlan_scan_obj {
 	bool bt_a2dp_enabled;
 	bool miracast_enabled;
 	bool disable_timeout;
+	bool drop_bcn_on_chan_mismatch;
 	struct scan_start_request scan_start_request_buff;
 };
 

umac/scan/dispatcher/inc/wlan_scan_public_structs.h

@@ -1329,4 +1329,15 @@ typedef void (*update_beacon_cb) (struct wlan_objmgr_pdev *pdev,
  */
 typedef QDF_STATUS (*scan_iterator_func) (void *arg,
 	struct scan_cache_entry *scan_entry);
+
+/**
+ * enum scan_priority - scan priority definitions
+ * @SCAN_CFG_DISABLE_SCAN_COMMAND_TIMEOUT: disable scan command timeout
+ * @SCAN_CFG_DROP_BCN_ON_CHANNEL_MISMATCH: config to drop beacon/probe
+ *  response frames if received channel and IE channels do not match
+ */
+enum scan_config {
+	SCAN_CFG_DISABLE_SCAN_COMMAND_TIMEOUT,
+	SCAN_CFG_DROP_BCN_ON_CHANNEL_MISMATCH,
+};
 #endif

umac/scan/dispatcher/inc/wlan_scan_ucfg_api.h

@@ -200,23 +200,28 @@ QDF_STATUS ucfg_scan_set_miracast(
 		struct wlan_objmgr_psoc *psoc, bool enable);
 
 /**
- * ucfg_scan_set_disable_timeout() - Public API to disable/enable scan timeout
- * @psoc: psoc on which scan timeout need to be disabled
- * @disable: disable scan timeout if true else enable scan timeout
+ * ucfg_scan_set_global_config() - Public API to set global scan config
+ * @psoc: psoc context
+ * @config: config to set
+ * @val: new config value
  *
  * Return: QDF_STATUS.
  */
 QDF_STATUS
-ucfg_scan_set_disable_timeout(struct wlan_objmgr_psoc *psoc, bool disable);
+ucfg_scan_set_global_config(struct wlan_objmgr_psoc *psoc,
+		enum scan_config config, uint32_t val);
 
 /**
- * ucfg_scan_get_disable_timeout() - Public API to get if scan timeout
- * is enabled or disabled
- * @psoc: psoc on which scan timeout status need to be checked
+ * ucfg_scan_get_global_config() - Public API to get global scan config
+ * @psoc: psoc context
+ * @config: config to set
+ * @val: uint32* to hold returned config value
  *
- * Return: true if timeout is diaabled else false.
+ * Return: QDF_STATUS.
  */
-bool ucfg_scan_get_disable_timeout(struct wlan_objmgr_psoc *psoc);
+QDF_STATUS
+ucfg_scan_get_global_config(struct wlan_objmgr_psoc *psoc,
+		enum scan_config config, uint32_t *val);
 
 /**
  * ucfg_scan_set_wide_band_scan() - Public API to disable/enable wide band scan

umac/scan/dispatcher/src/wlan_scan_ucfg_api.c

@@ -949,34 +949,6 @@ QDF_STATUS ucfg_scan_set_miracast(
 	return QDF_STATUS_SUCCESS;
 }
 
-QDF_STATUS
-ucfg_scan_set_disable_timeout(struct wlan_objmgr_psoc *psoc, bool disable)
-{
-	struct wlan_scan_obj *scan_obj;
-
-	scan_obj = wlan_psoc_get_scan_obj(psoc);
-	if (!scan_obj) {
-		scm_err("Failed to get scan object");
-		return QDF_STATUS_E_NULL_VALUE;
-	}
-	scan_obj->disable_timeout = disable;
-	scm_debug("set disable_timeout to %d", scan_obj->disable_timeout);
-
-	return QDF_STATUS_SUCCESS;
-}
-
-bool ucfg_scan_get_disable_timeout(struct wlan_objmgr_psoc *psoc)
-{
-	struct wlan_scan_obj *scan_obj;
-
-	scan_obj = wlan_psoc_get_scan_obj(psoc);
-	if (!scan_obj) {
-		scm_err("Failed to get scan object");
-		return false;
-	}
-	return scan_obj->disable_timeout;
-}
-
 QDF_STATUS
 ucfg_scan_set_wide_band_scan(struct wlan_objmgr_pdev *pdev, bool enable)
 {
@@ -1309,6 +1281,7 @@ static QDF_STATUS
 wlan_scan_global_init(struct wlan_scan_obj *scan_obj)
 {
 	scan_obj->enable_scan = true;
+	scan_obj->drop_bcn_on_chan_mismatch = true;
 	scan_obj->disable_timeout = false;
 	scan_obj->scan_def.active_dwell = SCAN_ACTIVE_DWELL_TIME;
 	scan_obj->scan_def.passive_dwell = SCAN_PASSIVE_DWELL_TIME;
@@ -2147,3 +2120,61 @@ bool ucfg_scan_get_bt_activity(struct wlan_objmgr_psoc *psoc)
 
 	return scan_obj->bt_a2dp_enabled;
 }
+
+QDF_STATUS
+ucfg_scan_set_global_config(struct wlan_objmgr_psoc *psoc,
+			       enum scan_config config, uint32_t val)
+{
+	struct wlan_scan_obj *scan_obj;
+	QDF_STATUS status = QDF_STATUS_SUCCESS;
+
+	scan_obj = wlan_psoc_get_scan_obj(psoc);
+	if (!scan_obj) {
+		scm_err("Failed to get scan object config:%d, val:%d",
+				config, val);
+		return QDF_STATUS_E_INVAL;
+	}
+	switch (config) {
+	case SCAN_CFG_DISABLE_SCAN_COMMAND_TIMEOUT:
+		scan_obj->disable_timeout = !!val;
+		break;
+	case SCAN_CFG_DROP_BCN_ON_CHANNEL_MISMATCH:
+		scan_obj->drop_bcn_on_chan_mismatch = !!val;
+		break;
+
+	default:
+		status = QDF_STATUS_E_INVAL;
+		break;
+	}
+
+	return status;
+}
+
+QDF_STATUS
+ucfg_scan_get_global_config(struct wlan_objmgr_psoc *psoc,
+			       enum scan_config config, uint32_t *val)
+{
+	struct wlan_scan_obj *scan_obj;
+	QDF_STATUS status = QDF_STATUS_SUCCESS;
+
+	scan_obj = wlan_psoc_get_scan_obj(psoc);
+	if (!scan_obj || !val) {
+		scm_err("scan object:%pK config:%d, val:0x%pK",
+				scan_obj, config, val);
+		return QDF_STATUS_E_INVAL;
+	}
+	switch (config) {
+	case SCAN_CFG_DISABLE_SCAN_COMMAND_TIMEOUT:
+		*val = scan_obj->disable_timeout;
+		break;
+	case SCAN_CFG_DROP_BCN_ON_CHANNEL_MISMATCH:
+		*val = scan_obj->drop_bcn_on_chan_mismatch;
+		break;
+
+	default:
+		status = QDF_STATUS_E_INVAL;
+		break;
+	}
+
+	return status;
+}