+ uint8_t ieIdx;
+ UEContextReleaseRequest_t *ueReleaseReq = NULLP;
+
+ if(f1apMsg)
+ {
+ if(f1apMsg->choice.initiatingMessage)
+ {
+ ueReleaseReq =&f1apMsg->choice.initiatingMessage->value.choice.UEContextReleaseRequest;
+ if(ueReleaseReq->protocolIEs.list.array)
+ {
+ for(ieIdx=0 ; ieIdx<ueReleaseReq->protocolIEs.list.count; ieIdx++)
+ {
+ DU_FREE(ueReleaseReq->protocolIEs.list.array[ieIdx], sizeof(UEContextReleaseRequest_t));
+ }
+ DU_FREE(ueReleaseReq->protocolIEs.list.array, ueReleaseReq->protocolIEs.list.size);
+ }
+ DU_FREE(f1apMsg->choice.initiatingMessage, sizeof(InitiatingMessage_t));
+ }
+ DU_FREE(f1apMsg, sizeof(F1AP_PDU_t));
+ }
+
+}
+/*****************************************************************i
+*
+* @brief Build and Send UE Context Release Request
+*
+* @details
+*
+* Function : BuildAndSendUeContextReleaseReq
+*
+* Functionality:
+* - Build and Send UE Context Release Request
+*
+* @params[in]
+* @return ROK - success
+* RFAILED - failure
+*
+* *************************************************************/
+uint8_t BuildAndSendUeContextReleaseReq(uint16_t cellId, uint8_t ueIdx)
+{
+ bool memAllocFail = false;
+ uint8_t ieIdx =0;
+ uint8_t ret = RFAILED;
+ uint16_t cellIdx =0;
+ uint16_t crnti = 0;
+ uint8_t elementCnt = 0;
+ uint32_t gnbCuUeF1apId =0; /* gNB-CU UE F1AP Id */
+ uint32_t gnbDuUeF1apId =0; /* gNB-DU UE F1AP Id */
+ asn_enc_rval_t encRetVal;
+ F1AP_PDU_t *f1apMsg = NULLP;
+ UEContextReleaseRequest_t *ueReleaseReq = NULLP;
+
+ DU_LOG("\nINFO --> Building the UE Context Release Request");
+ do
+ {
+ DU_ALLOC(f1apMsg, sizeof(F1AP_PDU_t));
+ if(f1apMsg == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseReq(): Memory allocation failed for f1apMsg");
+ break;
+ }
+
+ f1apMsg->present = F1AP_PDU_PR_initiatingMessage;
+ DU_ALLOC(f1apMsg->choice.initiatingMessage, sizeof(InitiatingMessage_t));
+ if(f1apMsg->choice.initiatingMessage == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseReq(): Memory allocation failed for\
+ initiatingMessage");
+ break;
+ }
+ f1apMsg->choice.initiatingMessage->procedureCode = ProcedureCode_id_UEContextReleaseRequest;
+ f1apMsg->choice.initiatingMessage->criticality = Criticality_reject;
+ f1apMsg->choice.initiatingMessage->value.present = \
+ InitiatingMessage__value_PR_UEContextReleaseRequest;
+
+ ueReleaseReq = &f1apMsg->choice.initiatingMessage->value.choice.UEContextReleaseRequest;
+
+ elementCnt = 2;
+
+ ueReleaseReq->protocolIEs.list.count = elementCnt;
+ ueReleaseReq->protocolIEs.list.size = elementCnt * sizeof(UEContextReleaseRequest_t *);
+
+ /* Initialize the F1Setup members */
+ DU_ALLOC(ueReleaseReq->protocolIEs.list.array,ueReleaseReq->protocolIEs.list.size);
+ if(ueReleaseReq->protocolIEs.list.array == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseReq(): Memory allocation failed for IE array");
+ break;
+ }
+ for(ieIdx=0; ieIdx<elementCnt; ieIdx++)
+ {
+ DU_ALLOC(ueReleaseReq->protocolIEs.list.array[ieIdx],\
+ sizeof(UEContextReleaseRequest_t));
+ if(ueReleaseReq->protocolIEs.list.array[ieIdx] == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseReq(): Memory allocation failed for IE elements");
+ memAllocFail = true;
+ break;
+ }
+ }
+ if(memAllocFail == true)
+ break;
+
+ /* Fetching Ue Cb Info*/
+ GET_CELL_IDX(cellId, cellIdx);
+ if(duCb.actvCellLst[cellIdx] == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseReq(): CellId[%d] does not exist", cellId);
+ break;
+ }
+ else
+ {
+ GET_CRNTI(crnti, ueIdx);
+ if(duCb.actvCellLst[cellIdx]->ueCb[ueIdx-1].crnti != crnti)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseReq(): crnti[%d] does not exist", crnti);
+ break;
+ }
+ gnbDuUeF1apId = duCb.actvCellLst[cellIdx]->ueCb[ueIdx-1].gnbDuUeF1apId;
+ gnbCuUeF1apId = duCb.actvCellLst[cellIdx]->ueCb[ueIdx-1].gnbCuUeF1apId;
+ }
+
+ ieIdx=0;
+ ueReleaseReq->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID;
+ ueReleaseReq->protocolIEs.list.array[ieIdx]->criticality= Criticality_reject;
+ ueReleaseReq->protocolIEs.list.array[ieIdx]->value.present = \
+ UEContextReleaseRequestIEs__value_PR_GNB_CU_UE_F1AP_ID;
+ ueReleaseReq->protocolIEs.list.array[ieIdx]->value.choice.GNB_CU_UE_F1AP_ID =gnbCuUeF1apId;
+
+ ieIdx++;
+ ueReleaseReq->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID;
+ ueReleaseReq->protocolIEs.list.array[ieIdx]->criticality= Criticality_reject;
+ ueReleaseReq->protocolIEs.list.array[ieIdx]->value.present =\
+ UEContextReleaseRequestIEs__value_PR_GNB_DU_UE_F1AP_ID;
+ ueReleaseReq->protocolIEs.list.array[ieIdx]->value.choice.GNB_DU_UE_F1AP_ID =gnbDuUeF1apId;
+
+ xer_fprint(stdout, &asn_DEF_F1AP_PDU, f1apMsg);
+
+ /* Encode the F1SetupRequest type as APER */
+ memset(encBuf, 0, ENC_BUF_MAX_LEN);
+ encBufSize = 0;
+ encRetVal = aper_encode(&asn_DEF_F1AP_PDU, 0, f1apMsg, PrepFinalEncBuf, encBuf);
+ /* Encode results */
+ if(encRetVal.encoded == ENCODE_FAIL)
+ {
+ DU_LOG("\nERROR --> F1AP : Could not encode UEContextReleaseRequest structure (at %s)\n",\
+ encRetVal.failed_type ? encRetVal.failed_type->name : "unknown");
+ break;
+ }
+ else
+ {
+ DU_LOG("\nDEBUG --> F1AP : Created APER encoded buffer for UEContextReleaseRequest\n");
+ for(ieIdx=0; ieIdx< encBufSize; ieIdx++)
+ {
+ printf("%x",encBuf[ieIdx]);
+ }
+ }
+
+ /* Sending msg */
+ if(sendF1APMsg() != ROK)
+ {
+ DU_LOG("\nERROR --> F1AP : Sending UE Context Release Request failed");
+ break;
+ }
+ ret = ROK;
+ break;
+ }while(true);
+
+ FreeUeContextReleaseReq(f1apMsg);
+ return ret;
+}
+/*****************************************************************i
+ *
+ * @brief Free memory allocated for UE Context Release Complete
+ *
+ * @details
+ *
+ * Function : FreeUeContextReleaseComplete
+ *
+ * Functionality:
+ * - Free memory allocated for UE Context Release Complete
+ *
+ * @params[in] F1AP_PDU_t *f1apMsg
+ * @return void
+ *
+ * *************************************************************/
+void FreeUeContextReleaseComplete(F1AP_PDU_t *f1apMsg)
+{
+ uint8_t ieIdx;
+ UEContextReleaseComplete_t *ueReleaseComplete = NULLP;
+
+ if(f1apMsg)
+ {
+ if(f1apMsg->choice.successfulOutcome)
+ {
+ ueReleaseComplete =&f1apMsg->choice.successfulOutcome->value.choice.UEContextReleaseComplete;
+ if(ueReleaseComplete->protocolIEs.list.array)
+ {
+ for(ieIdx=0 ; ieIdx<ueReleaseComplete->protocolIEs.list.count; ieIdx++)
+ {
+ DU_FREE(ueReleaseComplete->protocolIEs.list.array[ieIdx], sizeof(UEContextReleaseComplete_t));
+ }
+ DU_FREE(ueReleaseComplete->protocolIEs.list.array, ueReleaseComplete->protocolIEs.list.size);
+ }
+ DU_FREE(f1apMsg->choice.successfulOutcome, sizeof(SuccessfulOutcome_t));
+ }
+ DU_FREE(f1apMsg, sizeof(F1AP_PDU_t));
+ }
+
+}
+/*****************************************************************i
+ *
+ * @brief Build and Send UE Context Release Complete
+ *
+ * @details
+ *
+ * Function : BuildAndSendUeContextReleaseComplete
+ *
+ * Functionality:
+ * - Build and Send UE Context Release Complete
+ *
+ * @params[in] cellId, gnbCuUeF1apId, gnbDuUeF1apId
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * *************************************************************/
+uint8_t BuildAndSendUeContextReleaseComplete(uint16_t cellId, uint32_t gnbCuUeF1apId, uint32_t gnbDuUeF1apId)
+{
+ bool memAllocFail = false;
+ uint8_t ieIdx =0, ret = RFAILED, elementCnt = 0;
+ asn_enc_rval_t encRetVal;
+ F1AP_PDU_t *f1apMsg = NULLP;
+ UEContextReleaseComplete_t *ueReleaseComplete = NULLP;
+
+ DU_LOG("\nINFO --> Building the UE Context Release Complete");
+ do
+ {
+ DU_ALLOC(f1apMsg, sizeof(F1AP_PDU_t));
+ if(f1apMsg == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseComplete(): Memory allocation failed for f1apMsg");
+ break;
+ }
+
+ f1apMsg->present = F1AP_PDU_PR_successfulOutcome;
+ DU_ALLOC(f1apMsg->choice.successfulOutcome, sizeof(SuccessfulOutcome_t));
+ if(f1apMsg->choice.successfulOutcome == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseComplete(): Memory allocation failed for\
+ successfulOutcome");
+ break;
+ }
+ f1apMsg->choice.successfulOutcome->procedureCode = ProcedureCode_id_UEContextRelease;
+ f1apMsg->choice.successfulOutcome->criticality = Criticality_reject;
+ f1apMsg->choice.successfulOutcome->value.present = \
+ SuccessfulOutcome__value_PR_UEContextReleaseComplete;
+
+ ueReleaseComplete = &f1apMsg->choice.successfulOutcome->value.choice.UEContextReleaseComplete;
+
+ elementCnt = 2;
+ ueReleaseComplete->protocolIEs.list.count = elementCnt;
+ ueReleaseComplete->protocolIEs.list.size = elementCnt * sizeof(UEContextReleaseComplete_t *);
+
+ /* Initialize the UE Release Complete members */
+ DU_ALLOC(ueReleaseComplete->protocolIEs.list.array,ueReleaseComplete->protocolIEs.list.size);
+ if(ueReleaseComplete->protocolIEs.list.array == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseComplete(): Memory allocation failed for IE array");
+ break;
+ }
+ for(ieIdx=0; ieIdx<elementCnt; ieIdx++)
+ {
+ DU_ALLOC(ueReleaseComplete->protocolIEs.list.array[ieIdx],\
+ sizeof(UEContextReleaseComplete_t));
+ if(ueReleaseComplete->protocolIEs.list.array[ieIdx] == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendUeContextReleaseComplete(): Memory allocation failed for IE\
+ elements");
+ memAllocFail = true;
+ break;
+ }
+ }
+ if(memAllocFail == true)
+ break;
+
+
+ ieIdx=0;
+ ueReleaseComplete->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID;
+ ueReleaseComplete->protocolIEs.list.array[ieIdx]->criticality= Criticality_reject;
+ ueReleaseComplete->protocolIEs.list.array[ieIdx]->value.present = \
+ UEContextReleaseCompleteIEs__value_PR_GNB_CU_UE_F1AP_ID;
+ ueReleaseComplete->protocolIEs.list.array[ieIdx]->value.choice.GNB_CU_UE_F1AP_ID =gnbCuUeF1apId;
+
+ ieIdx++;
+ ueReleaseComplete->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID;
+ ueReleaseComplete->protocolIEs.list.array[ieIdx]->criticality= Criticality_reject;
+ ueReleaseComplete->protocolIEs.list.array[ieIdx]->value.present =\
+ UEContextReleaseCompleteIEs__value_PR_GNB_DU_UE_F1AP_ID;
+ ueReleaseComplete->protocolIEs.list.array[ieIdx]->value.choice.GNB_DU_UE_F1AP_ID =gnbDuUeF1apId;
+
+ xer_fprint(stdout, &asn_DEF_F1AP_PDU, f1apMsg);
+
+ /* Encode the F1SetupComplete type as APER */
+ memset(encBuf, 0, ENC_BUF_MAX_LEN);
+ encBufSize = 0;
+ encRetVal = aper_encode(&asn_DEF_F1AP_PDU, 0, f1apMsg, PrepFinalEncBuf, encBuf);
+ /* Encode results */
+ if(encRetVal.encoded == ENCODE_FAIL)
+ {
+ DU_LOG("\nERROR --> F1AP : Could not encode UEContextReleaseComplete structure (at %s)\n",\
+ encRetVal.failed_type ? encRetVal.failed_type->name : "unknown");
+ break;
+ }
+ else
+ {
+ DU_LOG("\nDEBUG --> F1AP : Created APER encoded buffer for UEContextReleaseComplete\n");
+ for(ieIdx=0; ieIdx< encBufSize; ieIdx++)
+ {
+ printf("%x",encBuf[ieIdx]);
+ }
+ }
+
+ /* Sending msg */
+ if(sendF1APMsg() != ROK)
+ {
+ DU_LOG("\nERROR --> F1AP : Sending UE Context Release Complete failed");
+ break;
+ }
+ ret = ROK;
+ break;
+ }while(true);
+
+ if(ret == ROK && (duCb.actvCellLst[cellId-1]->numActvUes == 0))
+ {
+ duCb.actvCellLst[cellId-1]->cellStatus = DELETION_IN_PROGRESS;
+ ret = duSendCellDeletReq(cellId);
+ if(ret != ROK)
+ {
+ DU_LOG("\nERROR --> F1AP: BuildAndSendUeContextReleaseComplete(): Failed to process cell\
+ Delete req for CellId");
+ }
+ }
+ FreeUeContextReleaseComplete(f1apMsg);
+ return ret;
+
+}
+
+/*******************************************************************
+*
+* @brief added free part for the memory allocated by aper_decoder
+*
+* @details
+*
+* Function : freeAperDecodeUeContextReleaseCommand
+*
+* Functionality: added free part for the memory allocated by aper_decoder
+*
+* @params[in] F1AP_PDU_t *f1apMsg
+* @return void
+*
+* ****************************************************************/
+void freeAperDecodeUeContextReleaseCommand(F1AP_PDU_t *f1apMsg)
+{
+ uint8_t ieIdx=0;
+ UEContextReleaseCommand_t *ueContextReleaseCommand = NULLP;
+
+ ueContextReleaseCommand = &f1apMsg->choice.initiatingMessage->value.choice.UEContextReleaseCommand;
+
+ if(ueContextReleaseCommand->protocolIEs.list.array)
+ {
+ for(ieIdx=0; ieIdx < ueContextReleaseCommand->protocolIEs.list.count; ieIdx++)
+ {
+ if(ueContextReleaseCommand->protocolIEs.list.array[ieIdx])
+ {
+ switch(ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->id)
+ {
+ case ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID:
+ break;
+ case ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID:
+ break;
+ case ProtocolIE_ID_id_Cause:
+ break;
+ case ProtocolIE_ID_id_RRCContainer:
+ {
+ if(ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->value.choice.RRCContainer.buf)
+ {
+ free(ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->value.choice.RRCContainer.buf);
+ }
+ break;
+ }
+ default :
+ DU_LOG("\nERROR --> F1AP: freeAperDecodeUeContextReleaseCommand():Invalid IE Received: %ld"\
+ ,ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->id);
+ break;
+ }
+ }
+ free(ueContextReleaseCommand->protocolIEs.list.array[ieIdx]);
+ }
+ free(ueContextReleaseCommand->protocolIEs.list.array);
+ }
+}
+/*******************************************************************
+*
+* @brief processing of UE Context Release Command
+*
+* @details
+*
+* Function : procF1UeContextReleaseCommand
+*
+* Functionality: processing of UE Context Release Command
+*
+* @params[in] F1AP_PDU_t *f1apMsg
+* @return void
+*
+* ****************************************************************/
+uint8_t procF1UeContextReleaseCommand(F1AP_PDU_t *f1apMsg)
+{
+ uint8_t ieIdx=0, ret=ROK, ueIdx=0;
+ uint16_t cellIdx =0;
+ bool ueIdxFound;
+ uint32_t gnbCuUeF1apId=0, gnbDuUeF1apId=0;
+ DuUeCb *duUeCb = NULLP;
+ UEContextReleaseCommand_t *ueContextReleaseCommand = NULLP;
+
+ ueContextReleaseCommand = &f1apMsg->choice.initiatingMessage->value.choice.UEContextReleaseCommand;
+
+ if(ueContextReleaseCommand->protocolIEs.list.array)
+ {
+ for(ieIdx=0; ieIdx < ueContextReleaseCommand->protocolIEs.list.count; ieIdx++)
+ {
+ if(ueContextReleaseCommand->protocolIEs.list.array[ieIdx])
+ {
+ switch(ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->id)
+ {
+ case ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID:
+ {
+ gnbCuUeF1apId= ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->\
+ value.choice.GNB_CU_UE_F1AP_ID;
+ break;
+ }
+
+ case ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID:
+ {
+ gnbDuUeF1apId = ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->\
+ value.choice.GNB_DU_UE_F1AP_ID;
+ break;
+ }
+
+ case ProtocolIE_ID_id_Cause:
+ {
+ break;
+ }
+
+ case ProtocolIE_ID_id_RRCContainer:
+ {
+ for(cellIdx = 0; cellIdx < duCb.numActvCells; cellIdx++)
+ {
+ for(ueIdx = 0; ueIdx < MAX_NUM_UE; ueIdx++)
+ {
+ if((duCb.actvCellLst[cellIdx]->ueCb[ueIdx].gnbDuUeF1apId == gnbDuUeF1apId)&&\
+ (duCb.actvCellLst[cellIdx]->ueCb[ueIdx].gnbCuUeF1apId == gnbCuUeF1apId))
+ {
+ duUeCb = &duCb.actvCellLst[cellIdx]->ueCb[ueIdx];
+ DU_ALLOC(duUeCb->f1UeDb, sizeof(F1UeContextSetupDb));
+ if(duUeCb->f1UeDb)
+ {
+ memset(duUeCb->f1UeDb, 0, sizeof(F1UeContextSetupDb));
+ duUeCb->f1UeDb->actionType = UE_CTXT_RELEASE;
+ duUeCb->f1UeDb->cellIdx = cellIdx;
+ /* Filling Dl RRC Msg Info */
+ DU_ALLOC_SHRABL_BUF(duUeCb->f1UeDb->dlRrcMsg, sizeof(F1DlRrcMsg));
+ if(!duUeCb->f1UeDb->dlRrcMsg)
+ {
+ DU_LOG("\nERROR --> DU APP : procF1UeContextReleaseCommand(): \
+ Memory allocation failed ");
+ ret = RFAILED;
+ }
+ else
+ {
+ duUeCb->f1UeDb->dlRrcMsgPres = true;
+ memset(duUeCb->f1UeDb->dlRrcMsg, 0, sizeof(F1DlRrcMsg));
+ ret = extractDlRrcMsg(gnbDuUeF1apId, gnbCuUeF1apId, duUeCb->f1UeDb->dlRrcMsg,\
+ &ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->\
+ value.choice.RRCContainer);
+ }
+
+ }
+ else
+ {
+ DU_LOG("\nERROR --> DU APP : procF1UeContextReleaseCommand(): \
+ Memory allocation failed ");
+ ret = RFAILED;
+
+ }
+
+ ueIdxFound = true;
+ break;
+ }
+ }
+ if(ueIdxFound == true)
+ {
+ break;
+ }
+ }
+ if(!ueIdxFound)
+ {
+ DU_LOG("\nERROR --> F1AP: DuUeCb is not found at procF1UeContextReleaseCommand()");
+ ret = RFAILED;
+ }
+
+
+ break;
+ }
+ default :
+ DU_LOG("\nERROR --> F1AP: freeAperDecodeUeContextReleaseCommand():Invalid IE Received: %ld"\
+ ,ueContextReleaseCommand->protocolIEs.list.array[ieIdx]->id);
+ break;
+ }
+ }
+ }
+ }
+ if(ret != RFAILED)
+ {
+ duProcUeContextReleaseCommand(duUeCb);
+ }
+ freeAperDecodeUeContextReleaseCommand(f1apMsg);
+ return ret;
+}
+/**************************************************************
+ *
+ * @brief Handles received F1AP message and sends back response
+ *
+ * @details
+ *
+ * Function : F1APMsgHdlr
+ *
+ * Functionality:
+ * - Decodes received F1AP control message
+ * - Prepares response message, encodes and sends to SCTP
+ *
+ * @params[in]
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+void F1APMsgHdlr(Buffer *mBuf)
+{
+ int i =0;