RICPLT-2910

[ric-plt/submgr.git] / e2ap / pkg / e2ap / e2ap_packerif.go

diff --git a/e2ap/pkg/e2ap/e2ap_packerif.go b/e2ap/pkg/e2ap/e2ap_packerif.go
new file mode 100644 (file)
index 0000000..d69a716
--- /dev/null
+++ b/e2ap/pkg/e2ap/e2ap_packerif.go
@@ -0,0 +1,246 @@
+/*
+==================================================================================
+  Copyright (c) 2019 AT&T Intellectual Property.
+  Copyright (c) 2019 Nokia
+
+   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 e2ap
+
+import (
+       "fmt"
+       "gerrit.o-ran-sc.org/r/ric-plt/e2ap/pkg/packer"
+)
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APMsgPackerIf interface {
+       Pack(*packer.PackedData) (error, *packer.PackedData)
+       UnPack(msg *packer.PackedData) error
+       String() string
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APMsgPackerSubscriptionRequestIf interface {
+       E2APMsgPackerIf
+       Set(*E2APSubscriptionRequest) error
+       Get() (error, *E2APSubscriptionRequest)
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APMsgPackerSubscriptionResponseIf interface {
+       E2APMsgPackerIf
+       Set(*E2APSubscriptionResponse) error
+       Get() (error, *E2APSubscriptionResponse)
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APMsgPackerSubscriptionFailureIf interface {
+       E2APMsgPackerIf
+       Set(*E2APSubscriptionFailure) error
+       Get() (error, *E2APSubscriptionFailure)
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APMsgPackerSubscriptionDeleteRequestIf interface {
+       E2APMsgPackerIf
+       Set(*E2APSubscriptionDeleteRequest) error
+       Get() (error, *E2APSubscriptionDeleteRequest)
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APMsgPackerSubscriptionDeleteResponseIf interface {
+       E2APMsgPackerIf
+       Set(*E2APSubscriptionDeleteResponse) error
+       Get() (error, *E2APSubscriptionDeleteResponse)
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APMsgPackerSubscriptionDeleteFailureIf interface {
+       E2APMsgPackerIf
+       Set(*E2APSubscriptionDeleteFailure) error
+       Get() (error, *E2APSubscriptionDeleteFailure)
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APMsgPackerIndicationIf interface {
+       E2APMsgPackerIf
+       Set(*E2APIndication) error
+       Get() (error, *E2APIndication)
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APPackerIf interface {
+       NewPackerSubscriptionRequest() E2APMsgPackerSubscriptionRequestIf
+       NewPackerSubscriptionResponse() E2APMsgPackerSubscriptionResponseIf
+       NewPackerSubscriptionFailure() E2APMsgPackerSubscriptionFailureIf
+       NewPackerSubscriptionDeleteRequest() E2APMsgPackerSubscriptionDeleteRequestIf
+       NewPackerSubscriptionDeleteResponse() E2APMsgPackerSubscriptionDeleteResponseIf
+       NewPackerSubscriptionDeleteFailure() E2APMsgPackerSubscriptionDeleteFailureIf
+       NewPackerIndication() E2APMsgPackerIndicationIf
+       MessageInfo(msg *packer.PackedData) *packer.MessageInfo
+}
+
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
+type E2APAutoPacker struct {
+       packer E2APPackerIf
+}
+
+func NewE2APAutoPacker(packer E2APPackerIf) *E2APAutoPacker {
+       return &E2APAutoPacker{packer: packer}
+}
+
+// TODO improve openasn handling to reuse PDU etc...
+// Now practically decodes two times each E2/X2 message, as first round solves message type
+func (autopacker *E2APAutoPacker) UnPack(msg *packer.PackedData) (error, interface{}) {
+       var err error = nil
+       msgInfo := autopacker.packer.MessageInfo(msg)
+       if msgInfo != nil {
+               switch msgInfo.MsgType {
+               case E2AP_InitiatingMessage:
+                       switch msgInfo.MsgId {
+                       case E2AP_RICSubscriptionRequest:
+                               unpa := autopacker.packer.NewPackerSubscriptionRequest()
+                               err = unpa.UnPack(msg)
+                               if err == nil {
+                                       return unpa.Get()
+                               }
+                       case E2AP_RICSubscriptionDeleteRequest:
+                               unpa := autopacker.packer.NewPackerSubscriptionDeleteRequest()
+                               err = unpa.UnPack(msg)
+                               if err == nil {
+                                       return unpa.Get()
+                               }
+                       case E2AP_RICIndication:
+                               unpa := autopacker.packer.NewPackerIndication()
+                               err = unpa.UnPack(msg)
+                               if err == nil {
+                                       return unpa.Get()
+                               }
+                       default:
+                               err = fmt.Errorf("MsgType: E2AP_InitiatingMessage => MsgId:%d unknown", msgInfo.MsgId)
+                       }
+               case E2AP_SuccessfulOutcome:
+                       switch msgInfo.MsgId {
+                       case E2AP_RICSubscriptionResponse:
+                               unpa := autopacker.packer.NewPackerSubscriptionResponse()
+                               err = unpa.UnPack(msg)
+                               if err == nil {
+                                       return unpa.Get()
+                               }
+                       case E2AP_RICSubscriptionDeleteResponse:
+                               unpa := autopacker.packer.NewPackerSubscriptionDeleteResponse()
+                               err = unpa.UnPack(msg)
+                               if err == nil {
+                                       return unpa.Get()
+                               }
+                       default:
+                               err = fmt.Errorf("MsgType: E2AP_SuccessfulOutcome => MsgId:%d unknown", msgInfo.MsgId)
+                       }
+               case E2AP_UnsuccessfulOutcome:
+                       switch msgInfo.MsgId {
+                       case E2AP_RICSubscriptionFailure:
+                               unpa := autopacker.packer.NewPackerSubscriptionFailure()
+                               err = unpa.UnPack(msg)
+                               if err == nil {
+                                       return unpa.Get()
+                               }
+                       case E2AP_RICSubscriptionDeleteFailure:
+                               unpa := autopacker.packer.NewPackerSubscriptionDeleteFailure()
+                               err = unpa.UnPack(msg)
+                               if err == nil {
+                                       return unpa.Get()
+                               }
+                       default:
+                               err = fmt.Errorf("MsgType: E2AP_UnsuccessfulOutcome => MsgId:%d unknown", msgInfo.MsgId)
+                       }
+               default:
+                       err = fmt.Errorf("MsgType: %d and MsgId:%d unknown", msgInfo.MsgType, msgInfo.MsgId)
+               }
+       } else {
+               err = fmt.Errorf("MsgInfo not received")
+       }
+       return err, nil
+}
+
+func (autopacker *E2APAutoPacker) Pack(data interface{}, trg *packer.PackedData) (error, *packer.PackedData) {
+       var err error = nil
+       switch themsg := data.(type) {
+       case *E2APSubscriptionRequest:
+               pa := autopacker.packer.NewPackerSubscriptionRequest()
+               err = pa.Set(themsg)
+               if err == nil {
+                       return pa.Pack(trg)
+               }
+       case *E2APSubscriptionResponse:
+               pa := autopacker.packer.NewPackerSubscriptionResponse()
+               err = pa.Set(themsg)
+               if err == nil {
+                       return pa.Pack(trg)
+               }
+       case *E2APSubscriptionFailure:
+               pa := autopacker.packer.NewPackerSubscriptionFailure()
+               err = pa.Set(themsg)
+               if err == nil {
+                       return pa.Pack(trg)
+               }
+       case *E2APSubscriptionDeleteRequest:
+               pa := autopacker.packer.NewPackerSubscriptionDeleteRequest()
+               err = pa.Set(themsg)
+               if err == nil {
+                       return pa.Pack(trg)
+               }
+       case *E2APSubscriptionDeleteResponse:
+               pa := autopacker.packer.NewPackerSubscriptionDeleteResponse()
+               err = pa.Set(themsg)
+               if err == nil {
+                       return pa.Pack(trg)
+               }
+       case *E2APSubscriptionDeleteFailure:
+               pa := autopacker.packer.NewPackerSubscriptionDeleteFailure()
+               err = pa.Set(themsg)
+               if err == nil {
+                       return pa.Pack(trg)
+               }
+       case *E2APIndication:
+               pa := autopacker.packer.NewPackerIndication()
+               err = pa.Set(themsg)
+               if err == nil {
+                       return pa.Pack(trg)
+               }
+       default:
+               err = fmt.Errorf("unknown message")
+       }
+       return err, nil
+}