E2Manager/converters/endc_setup_failure_response_converter.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 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
  18 //  platform project (RICP).
  19
  20
  21 package converters
  22
  23 // #cgo CFLAGS: -I../3rdparty/asn1codec/inc/ -I../3rdparty/asn1codec/e2ap_engine/
  24 // #cgo LDFLAGS: -L ../3rdparty/asn1codec/lib/ -L../3rdparty/asn1codec/e2ap_engine/ -le2ap_codec -lasncodec
  25 // #include <asn1codec_utils.h>
  26 // #include <x2setup_response_wrapper.h>
  27 import "C"
  28 import (
  29         "e2mgr/e2pdus"
  30         "e2mgr/logger"
  31         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  32         "unsafe"
  33 )
  34
  35 type EndcSetupFailureResponseConverter struct {
  36         logger *logger.Logger
  37 }
  38
  39 type IEndcSetupFailureResponseConverter interface {
  40         UnpackEndcSetupFailureResponseAndExtract(packedBuf []byte) (*entities.SetupFailure, error)
  41 }
  42
  43 func NewEndcSetupFailureResponseConverter(logger *logger.Logger) *EndcSetupFailureResponseConverter {
  44         return &EndcSetupFailureResponseConverter{
  45                 logger: logger,
  46         }
  47 }
  48
  49
  50 // Populate and return the EN-DC/X2 setup response failure structure with data from the pdu
  51 func endcX2SetupFailureResponseToProtobuf(pdu *C.E2AP_PDU_t) (*entities.SetupFailure, error) {
  52         setupFailure := entities.SetupFailure{}
  53
  54         if pdu.present == C.E2AP_PDU_PR_unsuccessfulOutcome {
  55                 //dereference a union of pointers (C union is represented as a byte array with the size of the largest member)
  56                 unsuccessfulOutcome := *(**C.UnsuccessfulOutcome_t)(unsafe.Pointer(&pdu.choice[0]))
  57                 if unsuccessfulOutcome != nil && unsuccessfulOutcome.value.present == C.UnsuccessfulOutcome__value_PR_ENDCX2SetupFailure {
  58                         endcX2SetupFailure := (*C.ENDCX2SetupFailure_t)(unsafe.Pointer(&unsuccessfulOutcome.value.choice[0]))
  59                         if endcX2SetupFailure != nil && endcX2SetupFailure.protocolIEs.list.count > 0 {
  60                                 count:=int(endcX2SetupFailure.protocolIEs.list.count)
  61                                 endcX2SetupFailure_IEs_slice := (*[1 << 30]*C.ENDCX2SetupFailure_IEs_t)(unsafe.Pointer(endcX2SetupFailure.protocolIEs.list.array))[:count:count]
  62                                 for _, endcX2SetupFailure_IE := range endcX2SetupFailure_IEs_slice {
  63                                         if endcX2SetupFailure_IE != nil {
  64                                                 switch endcX2SetupFailure_IE.value.present {
  65                                                 case C.ENDCX2SetupFailure_IEs__value_PR_Cause:
  66                                                         causeIE := (*C.Cause_t)(unsafe.Pointer(&endcX2SetupFailure_IE.value.choice[0]))
  67                                                         err := getCause(causeIE, &setupFailure)
  68                                                         if err != nil {
  69                                                                 return nil, err
  70                                                         }
  71                                                 case C.ENDCX2SetupFailure_IEs__value_PR_TimeToWait:
  72                                                         setupFailure.TimeToWait = entities.TimeToWait(1 + *((*C.TimeToWait_t)(unsafe.Pointer(&endcX2SetupFailure_IE.value.choice[0]))))
  73                                                 case C.ENDCX2SetupFailure_IEs__value_PR_CriticalityDiagnostics:
  74                                                         cdIE := (*C.CriticalityDiagnostics_t)(unsafe.Pointer(&endcX2SetupFailure_IE.value.choice[0]))
  75                                                         if cd, err := getCriticalityDiagnostics(cdIE); err == nil {
  76                                                                 setupFailure.CriticalityDiagnostics = cd
  77                                                         } else {
  78                                                                 return nil, err
  79                                                         }
  80                                                 }
  81                                         }
  82                                 }
  83                         }
  84                 }
  85         }
  86
  87         return &setupFailure, nil
  88 }
  89
  90 func (c *EndcSetupFailureResponseConverter) UnpackEndcSetupFailureResponseAndExtract(packedBuf []byte) (*entities.SetupFailure, error) {
  91         pdu, err := UnpackX2apPdu(c.logger, e2pdus.MaxAsn1CodecAllocationBufferSize, len(packedBuf), packedBuf, e2pdus.MaxAsn1CodecMessageBufferSize)
  92         if err != nil {
  93                 return nil, err
  94         }
  95
  96         defer C.delete_pdu(pdu)
  97
  98         return endcX2SetupFailureResponseToProtobuf(pdu)
  99 }