E2Manager/handlers/x2setupFailureResponseToProtobuf.go

   1 //
   2 // Copyright 2019 AT&T Intellectual Property
   3 // Copyright 2019 Nokia
   4 //
   5 // Licensed under the Apache License, Version 2.0 (the "License");
   6 // you may not use this file except in compliance with the License.
   7 // You may obtain a copy of the License at
   8 //
   9 //      http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16 //
  17
  18 package handlers
  19
  20 // #cgo CFLAGS: -I../asn1codec/inc/ -I../asn1codec/e2ap_engine/
  21 // #cgo LDFLAGS: -L ../asn1codec/lib/ -L../asn1codec/e2ap_engine/ -le2ap_codec -lasncodec
  22 // #include <asn1codec_utils.h>
  23 // #include <x2setup_response_wrapper.h>
  24 import "C"
  25 import (
  26         "e2mgr/logger"
  27         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  28         "unsafe"
  29 )
  30
  31 const (
  32         maxNrOfErrors = 256
  33 )
  34
  35 // The following are possible values of a choice field, find which the pdu contains.
  36 func getCause(causeIE *C.Cause_t, setupFailure *entities.SetupFailure) error {
  37         switch causeIE.present {
  38         case C.Cause_PR_radioNetwork:
  39                 v := (*C.CauseRadioNetwork_t)(unsafe.Pointer(&causeIE.choice[0]))
  40                 setupFailure.CauseGroup = &entities.SetupFailure_NetworkLayerCause{NetworkLayerCause: entities.RadioNetworkLayer_Cause(1 + *v)}
  41         case C.Cause_PR_transport:
  42                 v := (*C.CauseTransport_t)(unsafe.Pointer(&causeIE.choice[0]))
  43                 setupFailure.CauseGroup = &entities.SetupFailure_TransportLayerCause{TransportLayerCause: entities.TransportLayer_Cause(1 + *v)}
  44         case C.Cause_PR_protocol:
  45                 v := (*C.CauseProtocol_t)(unsafe.Pointer(&causeIE.choice[0]))
  46                 setupFailure.CauseGroup = &entities.SetupFailure_ProtocolCause{ProtocolCause: entities.Protocol_Cause(1 + *v)}
  47         case C.Cause_PR_misc:
  48                 v := (*C.CauseMisc_t)(unsafe.Pointer(&causeIE.choice[0]))
  49                 setupFailure.CauseGroup = &entities.SetupFailure_MiscellaneousCause{MiscellaneousCause: entities.Miscellaneous_Cause(1 + *v)}
  50         }
  51         return nil
  52 }
  53
  54 func getCriticalityDiagnostics(critDiagIE *C.CriticalityDiagnostics_t) (*entities.CriticalityDiagnostics, error) {
  55         var critDiag *entities.CriticalityDiagnostics
  56
  57         if critDiagIE.procedureCode != nil {
  58                 critDiag = &entities.CriticalityDiagnostics{}
  59                 critDiag.ProcedureCode = uint32(*critDiagIE.procedureCode)
  60
  61         }
  62
  63         if critDiagIE.triggeringMessage != nil {
  64                 if critDiag == nil {
  65                         critDiag = &entities.CriticalityDiagnostics{}
  66                 }
  67                 critDiag.TriggeringMessage = entities.TriggeringMessage(1 + *critDiagIE.triggeringMessage)
  68
  69         }
  70
  71         if critDiagIE.procedureCriticality != nil {
  72                 if critDiag == nil {
  73                         critDiag = &entities.CriticalityDiagnostics{}
  74                 }
  75                 critDiag.ProcedureCriticality = entities.Criticality(1 + *critDiagIE.procedureCriticality)
  76
  77         }
  78
  79         if critDiagIE.iEsCriticalityDiagnostics != nil && critDiagIE.iEsCriticalityDiagnostics.list.count > 0 && critDiagIE.iEsCriticalityDiagnostics.list.count < maxNrOfErrors {
  80                 if critDiag == nil {
  81                         critDiag = &entities.CriticalityDiagnostics{}
  82                 }
  83                 var infoElements []*entities.InformationElementCriticalityDiagnostic
  84                 iEsCriticalityDiagnostics := (*C.CriticalityDiagnostics_IE_List_t)(critDiagIE.iEsCriticalityDiagnostics)
  85                 count:=int(iEsCriticalityDiagnostics.list.count)
  86                 iEsCriticalityDiagnostics_slice := (*[1 << 30]*C.CriticalityDiagnostics_IE_List__Member)(unsafe.Pointer(iEsCriticalityDiagnostics.list.array))[:count:count]
  87                 for _, criticalityDiagnostics_IE_List__Member := range  iEsCriticalityDiagnostics_slice {
  88                         infoElement := &entities.InformationElementCriticalityDiagnostic{IeCriticality: entities.Criticality(1 + criticalityDiagnostics_IE_List__Member.iECriticality)}
  89                         infoElement.IeId = uint32(criticalityDiagnostics_IE_List__Member.iE_ID)
  90                         infoElement.TypeOfError = entities.TypeOfError(1 + criticalityDiagnostics_IE_List__Member.typeOfError)
  91
  92                         infoElements = append(infoElements, infoElement)
  93
  94                 }
  95                 critDiag.InformationElementCriticalityDiagnostics = infoElements
  96         }
  97
  98         return critDiag, nil
  99 }
 100
 101 // Populate and return the EN-DC/X2 setup response failure structure with data from the pdu
 102 func x2SetupFailureResponseToProtobuf(pdu *C.E2AP_PDU_t) (*entities.SetupFailure, error) {
 103         setupFailure := entities.SetupFailure{}
 104
 105         if pdu.present == C.E2AP_PDU_PR_unsuccessfulOutcome {
 106                 //dereference a union of pointers (C union is represented as a byte array with the size of the largest member)
 107                 unsuccessfulOutcome := *(**C.UnsuccessfulOutcome_t)(unsafe.Pointer(&pdu.choice[0]))
 108                 if unsuccessfulOutcome != nil && unsuccessfulOutcome.value.present == C.UnsuccessfulOutcome__value_PR_X2SetupFailure {
 109                         x2SetupFailure := (*C.X2SetupFailure_t)(unsafe.Pointer(&unsuccessfulOutcome.value.choice[0]))
 110                         if x2SetupFailure != nil && x2SetupFailure.protocolIEs.list.count > 0 {
 111                                 count:=int(x2SetupFailure.protocolIEs.list.count)
 112                                 x2SetupFailure_IEs_slice := (*[1 << 30]*C.X2SetupFailure_IEs_t)(unsafe.Pointer(x2SetupFailure.protocolIEs.list.array))[:count:count]
 113                                 for _, x2SetupFailure_IE := range x2SetupFailure_IEs_slice {
 114                                         if x2SetupFailure_IE != nil {
 115                                                 switch x2SetupFailure_IE.value.present {
 116                                                 case C.X2SetupFailure_IEs__value_PR_Cause:
 117                                                         causeIE := (*C.Cause_t)(unsafe.Pointer(&x2SetupFailure_IE.value.choice[0]))
 118                                                         err := getCause(causeIE, &setupFailure)
 119                                                         if err != nil {
 120                                                                 return nil, err
 121                                                         }
 122                                                 case C.X2SetupFailure_IEs__value_PR_TimeToWait:
 123                                                         setupFailure.TimeToWait = entities.TimeToWait(1 + *((*C.TimeToWait_t)(unsafe.Pointer(&x2SetupFailure_IE.value.choice[0]))))
 124                                                 case C.X2SetupFailure_IEs__value_PR_CriticalityDiagnostics:
 125                                                         cdIE := (*C.CriticalityDiagnostics_t)(unsafe.Pointer(&x2SetupFailure_IE.value.choice[0]))
 126                                                         if cd, err := getCriticalityDiagnostics(cdIE); err == nil {
 127                                                                 setupFailure.CriticalityDiagnostics = cd
 128                                                         } else {
 129                                                                 return nil, err
 130                                                         }
 131                                                 }
 132                                         }
 133                                 }
 134                         }
 135                 }
 136         }
 137
 138         return &setupFailure, nil
 139 }
 140
 141 func unpackX2SetupFailureResponseAndExtract(logger *logger.Logger, allocationBufferSize int, packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (*entities.SetupFailure, error) {
 142         pdu, err := unpackX2apPdu(logger, allocationBufferSize, packedBufferSize, packedBuf, maxMessageBufferSize)
 143         if err != nil {
 144                 return nil, err
 145         }
 146
 147         defer C.delete_pdu(pdu)
 148
 149         return x2SetupFailureResponseToProtobuf(pdu)
 150 }