[VOL-3039] : Multi-tcont support in openonu-go adapter
Start version 0.1.14-dev141
Change-Id: I64e60efa041df317b4ce87e0aa9678b0da4ce14e
diff --git a/internal/pkg/onuadaptercore/openonu_utils.go b/internal/pkg/onuadaptercore/openonu_utils.go
new file mode 100644
index 0000000..aa7de95
--- /dev/null
+++ b/internal/pkg/onuadaptercore/openonu_utils.go
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2020-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 adaptercoreonu provides the utility for onu devices, flows and statistics
+package adaptercoreonu
+
+import (
+ "errors"
+ "regexp"
+ "strconv"
+ "strings"
+)
+
+// GetTpIDFromTpPath extracts TpID from the TpPath.
+// On success it returns a valid TpID and nil error.
+// On failure it returns TpID as 0 and the error.
+func GetTpIDFromTpPath(tpPath string) (uint8, error) {
+ // tpPath is of the format <technology>/<table_id>/olt-{}/pon-{}/onu-{}/uni-{}
+ // A sample tpPath is ==> XGS-PON/64/olt-{12345abcd}/pon-{0}/onu-{1}/uni-{1}
+ var tpPathFormat = regexp.MustCompile(`^[a-zA-Z\-_]+/[0-9]+/olt-{[a-z0-9\-]+}/pon-{[0-9]+}/onu-{[0-9]+}/uni-{[0-9]+}$`)
+
+ // Ensure tpPath is of the format <technology>/<table_id>/<uni_port_name>
+ if !tpPathFormat.Match([]byte(tpPath)) {
+ return 0, errors.New("tp-path-not-confirming-to-format")
+ }
+ // Extract the TP table-id field.
+ tpID, err := strconv.Atoi(strings.Split(tpPath, "/")[1])
+ // Atoi returns uint64 and need to be type-casted to uint8 as tpID is uint8 size.
+ return uint8(tpID), err
+}