E2Manager/converters/x2_reset_response_extractor.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 converters
  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 <SuccessfulOutcome.h>
  24 import "C"
  25 import (
  26         "e2mgr/e2pdus"
  27         "e2mgr/logger"
  28         "fmt"
  29         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  30         "unsafe"
  31 )
  32
  33 type X2ResetResponseExtractor struct {
  34         logger *logger.Logger
  35 }
  36
  37 func NewX2ResetResponseExtractor(logger *logger.Logger) *X2ResetResponseExtractor {
  38         return &X2ResetResponseExtractor{
  39                 logger: logger,
  40         }
  41 }
  42
  43 type IX2ResetResponseExtractor interface {
  44         ExtractCriticalityDiagnosticsFromPdu(packedBuffer []byte) (*entities.CriticalityDiagnostics, error)
  45 }
  46
  47 func (e *X2ResetResponseExtractor) ExtractCriticalityDiagnosticsFromPdu(packedBuffer []byte) (*entities.CriticalityDiagnostics, error) {
  48         pdu, err := UnpackX2apPdu(e.logger, e2pdus.MaxAsn1CodecAllocationBufferSize, len(packedBuffer), packedBuffer, e2pdus.MaxAsn1CodecMessageBufferSize)
  49
  50         if err != nil {
  51                 return nil, err
  52         }
  53
  54         if pdu.present != C.E2AP_PDU_PR_successfulOutcome {
  55                 return nil, fmt.Errorf("Invalid E2AP_PDU value")
  56         }
  57
  58         successfulOutcome := *(**C.SuccessfulOutcome_t)(unsafe.Pointer(&pdu.choice[0]))
  59
  60         if successfulOutcome == nil || successfulOutcome.value.present != C.SuccessfulOutcome__value_PR_ResetResponse {
  61                 return nil, fmt.Errorf("Unexpected SuccessfulOutcome value")
  62         }
  63
  64         resetResponse := (*C.ResetResponse_t)(unsafe.Pointer(&successfulOutcome.value.choice[0]))
  65
  66         protocolIEsListCount := resetResponse.protocolIEs.list.count
  67
  68         if protocolIEsListCount == 0 {
  69                 return nil, nil
  70         }
  71
  72         if protocolIEsListCount != 1 {
  73                 return nil, fmt.Errorf("Invalid protocolIEs list count")
  74         }
  75
  76         resetResponseIEs := (*[1 << 30]*C.ResetResponse_IEs_t)(unsafe.Pointer(resetResponse.protocolIEs.list.array))[:int(protocolIEsListCount):int(protocolIEsListCount)]
  77
  78         resetResponseIE := resetResponseIEs[0]
  79
  80         if resetResponseIE.value.present != C.ResetResponse_IEs__value_PR_CriticalityDiagnostics {
  81                 return nil, fmt.Errorf("Invalid protocolIEs value")
  82         }
  83
  84         cd := (*C.CriticalityDiagnostics_t)(unsafe.Pointer(&resetResponseIE.value.choice[0]))
  85
  86         return getCriticalityDiagnostics(cd)
  87 }