[SEBA-342] Publishing logs to kafka

Change-Id: Iaa72945dfd59a5d151cad14ff593eb299229fb3e
diff --git a/common/utils/utils.go b/common/utils/utils.go
new file mode 100644
index 0000000..a8fc3ba
--- /dev/null
+++ b/common/utils/utils.go
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package utils
+
+import (
+	"fmt"
+
+	"gerrit.opencord.org/voltha-bbsim/device"
+)
+
+func OnuToSn(onu *device.Onu) string {
+	// TODO this can be more elegant,
+	// see https://github.com/opencord/voltha/blob/master/voltha/adapters/openolt/openolt_device.py#L929-L943
+	return string(onu.SerialNumber.VendorId) + "00000" + fmt.Sprint(onu.IntfID) + "0" + fmt.Sprintf("%x", onu.OnuID)
+}