VOL-4337: Code upgrade for 3/2020 G.988 support and remaining Extended Message Set support

Change-Id: I6c5e1a167216ad9b51e9da89460e9909465ae1bc
diff --git a/meframe/me_create.go b/meframe/me_create.go
new file mode 100644
index 0000000..1f363ed
--- /dev/null
+++ b/meframe/me_create.go
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2018 - present.  Boling Consulting Solutions (bcsw.net)
+ * 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 meframe
+
+import (
+	"errors"
+	"github.com/google/gopacket"
+	. "github.com/opencord/omci-lib-go"
+	me "github.com/opencord/omci-lib-go/generated"
+)
+
+func CreateRequestFrame(m *me.ManagedEntity, opt options) (gopacket.SerializableLayer, error) {
+	if opt.frameFormat == ExtendedIdent {
+		return nil, errors.New("extended message set for this message type is not supported")
+	}
+	// NOTE: The OMCI parser does not extract the default values of set-by-create attributes
+	//       and are the zero 'default' (or nil) at this time.  For this reason, make sure
+	//       you specify all non-zero default values and pass them in appropriate
+	meLayer := &CreateRequest{
+		MeBasePacket: MeBasePacket{
+			EntityClass:    m.GetClassID(),
+			EntityInstance: m.GetEntityID(),
+			Extended:       opt.frameFormat == ExtendedIdent,
+		},
+		Attributes: m.GetAttributeValueMap(),
+	}
+	// Add any missing SetByCreate options if requested
+	if opt.addDefaults {
+		if attrDefs, err := me.GetAttributesDefinitions(m.GetClassID()); err.StatusCode() == me.Success {
+			for index, attr := range attrDefs {
+				if me.SupportsAttributeAccess(attr, me.SetByCreate) {
+					if index == 0 {
+						continue // Skip Entity ID, if it is SetByCreate, they should always specify it
+					}
+					if _, found := meLayer.Attributes[attr.GetName()]; !found {
+						meLayer.Attributes[attr.GetName()] = attr.DefValue
+					}
+				}
+			}
+		}
+	}
+	return meLayer, nil
+}
+
+func CreateResponseFrame(m *me.ManagedEntity, opt options) (gopacket.SerializableLayer, error) {
+	if opt.frameFormat == ExtendedIdent {
+		return nil, errors.New("extended message set for this message type is not supported")
+	}
+	meLayer := &CreateResponse{
+		MeBasePacket: MeBasePacket{
+			EntityClass:    m.GetClassID(),
+			EntityInstance: m.GetEntityID(),
+			Extended:       opt.frameFormat == ExtendedIdent,
+		},
+		Result: opt.result,
+	}
+	if meLayer.Result == me.ParameterError {
+		meLayer.AttributeExecutionMask = opt.attrExecutionMask
+	}
+	return meLayer, nil
+}