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 //  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 <SuccessfulOutcome.h>
  27 import "C"
  28 import (
  29         "e2mgr/e2pdus"
  30         "e2mgr/logger"
  31         "fmt"
  32         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  33         "unsafe"
  34 )
  35
  36 type X2ResetResponseExtractor struct {
  37         logger *logger.Logger
  38 }
  39
  40 func NewX2ResetResponseExtractor(logger *logger.Logger) *X2ResetResponseExtractor {
  41         return &X2ResetResponseExtractor{
  42                 logger: logger,
  43         }
  44 }
  45
  46 type IX2ResetResponseExtractor interface {
  47         ExtractCriticalityDiagnosticsFromPdu(packedBuffer []byte) (*entities.CriticalityDiagnostics, error)
  48 }
  49
  50 func (e *X2ResetResponseExtractor) ExtractCriticalityDiagnosticsFromPdu(packedBuffer []byte) (*entities.CriticalityDiagnostics, error) {
  51         pdu, err := UnpackX2apPdu(e.logger, e2pdus.MaxAsn1CodecAllocationBufferSize, len(packedBuffer), packedBuffer, e2pdus.MaxAsn1CodecMessageBufferSize)
  52
  53         if err != nil {
  54                 return nil, err
  55         }
  56
  57         if pdu.present != C.E2AP_PDU_PR_successfulOutcome {
  58                 return nil, fmt.Errorf("Invalid E2AP_PDU value")
  59         }
  60
  61         successfulOutcome := *(**C.SuccessfulOutcome_t)(unsafe.Pointer(&pdu.choice[0]))
  62
  63         if successfulOutcome == nil || successfulOutcome.value.present != C.SuccessfulOutcome__value_PR_ResetResponse {
  64                 return nil, fmt.Errorf("Unexpected SuccessfulOutcome value")
  65         }
  66
  67         resetResponse := (*C.ResetResponse_t)(unsafe.Pointer(&successfulOutcome.value.choice[0]))
  68
  69         protocolIEsListCount := resetResponse.protocolIEs.list.count
  70
  71         if protocolIEsListCount == 0 {
  72                 return nil, nil
  73         }
  74
  75         if protocolIEsListCount != 1 {
  76                 return nil, fmt.Errorf("Invalid protocolIEs list count")
  77         }
  78
  79         resetResponseIEs := (*[1 << 30]*C.ResetResponse_IEs_t)(unsafe.Pointer(resetResponse.protocolIEs.list.array))[:int(protocolIEsListCount):int(protocolIEsListCount)]
  80
  81         resetResponseIE := resetResponseIEs[0]
  82
  83         if resetResponseIE.value.present != C.ResetResponse_IEs__value_PR_CriticalityDiagnostics {
  84                 return nil, fmt.Errorf("Invalid protocolIEs value")
  85         }
  86
  87         cd := (*C.CriticalityDiagnostics_t)(unsafe.Pointer(&resetResponseIE.value.choice[0]))
  88
  89         return getCriticalityDiagnostics(cd)
  90 }