+ * @brief Builds the Paging cell list
+ *
+ * @details
+ *
+ * Function : BuildPagingCellList
+ *
+ * Functionality: Build the paging cell list
+ *
+ * @params[in] PagingCell_list_t *pagingCelllist,
+ *
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+uint8_t BuildPagingCellList(PagingCell_list_t *pagingCelllist, uint8_t numCells, CuCellCb *cellCb)
+{
+ uint8_t cellIdx =0;
+ PagingCell_ItemIEs_t *pagingCellItemIes;
+ PagingCell_Item_t *pagingCellItem;
+
+ pagingCelllist->list.count = numCells;
+ pagingCelllist->list.size = pagingCelllist->list.count * (sizeof(PagingCell_ItemIEs_t*));
+ CU_ALLOC(pagingCelllist->list.array, pagingCelllist->list.size);
+ if(pagingCelllist->list.array == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildPagingCellList(): Memory allocation failed ");
+ return RFAILED;
+ }
+
+ for(cellIdx = 0; cellIdx < pagingCelllist->list.count; cellIdx++)
+ {
+ CU_ALLOC(pagingCelllist->list.array[cellIdx], sizeof(PagingCell_ItemIEs_t));
+ if(pagingCelllist->list.array[cellIdx] == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildPagingCellList(): Memory allocation failed ");
+ return RFAILED;
+ }
+ }
+
+ for(cellIdx = 0; cellIdx < pagingCelllist->list.count; cellIdx++)
+ {
+ pagingCellItemIes = (PagingCell_ItemIEs_t *)pagingCelllist->list.array[cellIdx];
+ pagingCellItemIes->id = ProtocolIE_ID_id_PagingCell_Item;
+ pagingCellItemIes->criticality = Criticality_ignore;
+ pagingCellItemIes->value.present = PagingCell_ItemIEs__value_PR_PagingCell_Item;
+ pagingCellItem = &pagingCellItemIes->value.choice.PagingCell_Item;
+
+ /* Fill NrCgi Information */
+ BuildNrcgi(&pagingCellItem->nRCGI, cellCb[cellIdx].nrCellId);
+ }
+
+ return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief Deallocation of memory allocated in paging msg
+ *
+ * @details
+ *
+ * Function :FreePagingMsg
+ *
+ * Functionality: Deallocation of memory allocated in paging msg
+ *
+ * @params[in] F1AP_PDU_t *f1apMsg
+ *
+ * @return void
+ *
+ * ****************************************************************/
+void FreePagingMsg(F1AP_PDU_t *f1apMsg)
+{
+ uint8_t ieIdx, cellIdx;
+ Paging_t *paging;
+ PagingCell_ItemIEs_t *pagingCellItemIes;
+ PagingCell_Item_t *pagingCellItem;
+ PagingCell_list_t *pagingCelllist;
+
+ if(f1apMsg)
+ {
+ if(f1apMsg->choice.initiatingMessage)
+ {
+ paging = &f1apMsg->choice.initiatingMessage->value.choice.Paging;
+ if(paging->protocolIEs.list.array)
+ {
+ for(ieIdx=0 ; ieIdx<paging->protocolIEs.list.count; ieIdx++)
+ {
+ if(paging->protocolIEs.list.array[ieIdx])
+ {
+ switch(paging->protocolIEs.list.array[ieIdx]->id)
+ {
+ case ProtocolIE_ID_id_UEIdentityIndexValue:
+ {
+ CU_FREE(paging->protocolIEs.list.array[ieIdx]->value.choice.UEIdentityIndexValue.choice.indexLength10.buf,\
+ paging->protocolIEs.list.array[ieIdx]->value.choice.UEIdentityIndexValue.choice.indexLength10.size);
+ break;
+ }
+
+ case ProtocolIE_ID_id_PagingIdentity:
+ {
+ if(paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.present == PagingIdentity_PR_cNUEPagingIdentity)
+ {
+ if(paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity)
+ {
+ if(paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->present == CNUEPagingIdentity_PR_fiveG_S_TMSI)
+ {
+ CU_FREE(paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->choice.fiveG_S_TMSI.buf,\
+ paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->choice.fiveG_S_TMSI.size);
+ }
+ CU_FREE(paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity,\
+ sizeof(struct CNUEPagingIdentity));
+ }
+ }
+ break;
+ }
+
+ case ProtocolIE_ID_id_PagingCell_List:
+ {
+ pagingCelllist = &paging->protocolIEs.list.array[ieIdx]->value.choice.PagingCell_list;
+ if(pagingCelllist->list.array)
+ {
+ for(cellIdx = 0; cellIdx < pagingCelllist->list.count; cellIdx++)
+ {
+ if(pagingCelllist->list.array[cellIdx])
+ {
+ pagingCellItemIes = (PagingCell_ItemIEs_t *)pagingCelllist->list.array[cellIdx];
+ if(pagingCellItemIes->id == ProtocolIE_ID_id_PagingCell_Item)
+ {
+ pagingCellItem = &pagingCellItemIes->value.choice.PagingCell_Item;
+ CU_FREE(pagingCellItem->nRCGI.pLMN_Identity.buf, pagingCellItem->nRCGI.pLMN_Identity.size);
+ CU_FREE(pagingCellItem->nRCGI.nRCellIdentity.buf, pagingCellItem->nRCGI.nRCellIdentity.size);
+ }
+ CU_FREE(pagingCelllist->list.array[cellIdx], sizeof(PagingCell_ItemIEs_t));
+ }
+ }
+ CU_FREE(pagingCelllist->list.array, pagingCelllist->list.size);
+ }
+ break;
+ }
+ }
+ CU_FREE(paging->protocolIEs.list.array[ieIdx], sizeof(Paging_t));
+ }
+ }
+ CU_FREE(paging->protocolIEs.list.array, paging->protocolIEs.list.size);
+ }
+ CU_FREE(f1apMsg->choice.initiatingMessage, sizeof(InitiatingMessage_t));
+ }
+ CU_FREE(f1apMsg, sizeof(F1AP_PDU_t));
+ }
+}
+/*******************************************************************
+ *
+ * @brief Builds and sends the paging message if UE is in idle mode
+ *
+ * @details
+ *
+ * Function : BuildAndSendPagingMsg
+ *
+ * Functionality: Builds and sends the paging message
+ *
+ * @params[in] uint32_t duId, uint8_t gsTmsi
+ *
+ * @return ROK - success
+ * RFAILED - failure
+ *
+ * ****************************************************************/
+uint8_t BuildAndSendPagingMsg(uint64_t gsTmsi, uint8_t duId)
+{
+ bool memAllocFailed = false;
+ uint8_t ieIdx = 0, elementCnt = 0, ret = RFAILED;
+ uint16_t ueId = 0, duIdx = 0;
+
+ /*As per 38.473 Sec 9.3.1.39, UE Identity Index Value (10bits) > 2 Bytes + 6 Unused Bits
+ *5G-S-TMSI :48 Bits >> 6 Bytes and 0 UnusedBits */
+ uint8_t totalByteInUeId = 2, totalByteInTmsi = 6;
+ uint8_t unusedBitsInUeId = 6, unusedBitsInTmsi = 0;
+
+ F1AP_PDU_t *f1apMsg = NULLP;
+ Paging_t *paging = NULLP;
+ DuDb *duDb;
+ asn_enc_rval_t encRetVal;
+
+ DU_LOG("\nINFO --> F1AP : Building PAGING Message command\n");
+
+ SEARCH_DU_DB(duIdx, duId, duDb);
+ if(duDb == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): DuDb is empty");
+ return ret;
+ }
+ if(duDb->numCells == 0)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): No CELL is UP!");
+ return ret;
+ }
+
+ while(true)
+ {
+ CU_ALLOC(f1apMsg, sizeof(F1AP_PDU_t));
+ if(f1apMsg == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): Memory allocation for F1AP-PDU");
+ break;
+ }
+
+ f1apMsg->present = F1AP_PDU_PR_initiatingMessage;
+
+ CU_ALLOC(f1apMsg->choice.initiatingMessage, sizeof(InitiatingMessage_t));
+ if(f1apMsg->choice.initiatingMessage == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): Memory allocation for F1AP-PDU failed ");
+ break;
+ }
+ f1apMsg->choice.initiatingMessage->procedureCode = ProcedureCode_id_Paging;
+ f1apMsg->choice.initiatingMessage->criticality = Criticality_reject;
+ f1apMsg->choice.initiatingMessage->value.present = InitiatingMessage__value_PR_Paging;
+
+ paging = &f1apMsg->choice.initiatingMessage->value.choice.Paging;
+
+ elementCnt = 5;
+ paging->protocolIEs.list.count = elementCnt;
+ paging->protocolIEs.list.size = elementCnt * sizeof(Paging_t*);
+
+ /* Initialize the Paging Message members */
+ CU_ALLOC(paging->protocolIEs.list.array, paging->protocolIEs.list.size);
+ if(paging->protocolIEs.list.array == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg():Memory allocation failed");
+ break;
+ }
+
+ for(ieIdx=0 ; ieIdx<elementCnt; ieIdx++)
+ {
+ CU_ALLOC(paging->protocolIEs.list.array[ieIdx], sizeof(Paging_t));
+ if(paging->protocolIEs.list.array[ieIdx] == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): Memory allocation failed ");
+ memAllocFailed = true;
+ break;
+ }
+ }
+
+ if(memAllocFailed == true)
+ {
+ break;
+ }
+
+ /* UE Identity Index Value */
+ ieIdx=0;
+ paging->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_UEIdentityIndexValue;
+ paging->protocolIEs.list.array[ieIdx]->criticality = Criticality_reject;
+ paging->protocolIEs.list.array[ieIdx]->value.present = PagingIEs__value_PR_UEIdentityIndexValue;
+ paging->protocolIEs.list.array[ieIdx]->value.choice.UEIdentityIndexValue.present = UEIdentityIndexValue_PR_indexLength10;
+ paging->protocolIEs.list.array[ieIdx]->value.choice.UEIdentityIndexValue.choice.indexLength10.size = totalByteInUeId*sizeof(uint8_t);
+ CU_ALLOC(paging->protocolIEs.list.array[ieIdx]->value.choice.UEIdentityIndexValue.choice.indexLength10.buf,\
+ paging->protocolIEs.list.array[ieIdx]->value.choice.UEIdentityIndexValue.choice.indexLength10.size);
+ if(paging->protocolIEs.list.array[ieIdx]->value.choice.UEIdentityIndexValue.choice.indexLength10.buf == NULLP)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): Memory allocation failed ");
+ break;
+ }
+
+ /*As per 3gpp Spec 38.304 Sec 7.1: UE_ID: 5G-S-TMSI mod 1024*/
+ ueId = gsTmsi % 1024;
+ fillBitString(&paging->protocolIEs.list.array[ieIdx]->value.choice.UEIdentityIndexValue.choice.indexLength10, unusedBitsInUeId, totalByteInUeId, ueId);
+
+ /* Paging Identity */
+ ieIdx++;
+ paging->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_PagingIdentity;
+ paging->protocolIEs.list.array[ieIdx]->criticality = Criticality_reject;
+ paging->protocolIEs.list.array[ieIdx]->value.present = PagingIEs__value_PR_PagingIdentity;
+ paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.present = \
+ PagingIdentity_PR_cNUEPagingIdentity;
+ CU_ALLOC(paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity, \
+ sizeof(struct CNUEPagingIdentity));
+ if(!paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): Memory allocation failed ");
+ break;
+ }
+
+ paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->present = \
+ CNUEPagingIdentity_PR_fiveG_S_TMSI;
+
+ paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->choice.fiveG_S_TMSI.size = totalByteInTmsi*sizeof(uint8_t);
+ CU_ALLOC(paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->choice.fiveG_S_TMSI.buf,\
+ paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->choice.fiveG_S_TMSI.size);
+ if(!paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->choice.fiveG_S_TMSI.buf)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): Memory allocation failed ");
+ break;
+ }
+
+ fillBitString(&paging->protocolIEs.list.array[ieIdx]->value.choice.PagingIdentity.choice.cNUEPagingIdentity->choice.fiveG_S_TMSI,\
+ unusedBitsInTmsi, totalByteInTmsi, gsTmsi);
+
+ /* Paging Drx */
+ ieIdx++;
+ paging->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_PagingDRX;
+ paging->protocolIEs.list.array[ieIdx]->criticality = Criticality_ignore;
+ paging->protocolIEs.list.array[ieIdx]->value.present = PagingIEs__value_PR_PagingDRX;
+ paging->protocolIEs.list.array[ieIdx]->value.choice.PagingDRX = PagingDRX_v32;
+
+ /* Paging Priority */
+ ieIdx++;
+ paging->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_PagingPriority;
+ paging->protocolIEs.list.array[ieIdx]->criticality = Criticality_ignore;
+ paging->protocolIEs.list.array[ieIdx]->value.present = PagingIEs__value_PR_PagingPriority;
+ paging->protocolIEs.list.array[ieIdx]->value.choice.PagingPriority = PagingPriority_priolevel2;
+
+ /* Paging Cell List */
+ ieIdx++;
+ paging->protocolIEs.list.array[ieIdx]->id = ProtocolIE_ID_id_PagingCell_List;
+ paging->protocolIEs.list.array[ieIdx]->criticality = Criticality_ignore;
+ paging->protocolIEs.list.array[ieIdx]->value.present = PagingIEs__value_PR_PagingCell_list;
+ if(BuildPagingCellList(&paging->protocolIEs.list.array[ieIdx]->value.choice.PagingCell_list, duDb->numCells, duDb->cellCb) != ROK)
+ {
+ DU_LOG("\nERROR --> F1AP : BuildAndSendPagingMsg(): Failed to build Paging cell list ");
+ break;
+ }
+
+ xer_fprint(stdout, &asn_DEF_F1AP_PDU, f1apMsg);
+
+ /* Encode the UE Context Release Command 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 Release Command structure (at %s)\n",\
+ encRetVal.failed_type ? encRetVal.failed_type->name : "unknown");
+ break;
+ }
+ else
+ {
+ DU_LOG("\nDEBUG --> F1AP : Created APER encoded buffer for Paging\n");
+ for(ieIdx=0; ieIdx< encBufSize; ieIdx++)
+ {
+ DU_LOG("%x",encBuf[ieIdx]);
+ }
+ }
+
+ if(SendF1APMsg(CU_APP_MEM_REG, CU_POOL, duId) != ROK)
+ {
+ DU_LOG("\nERROR --> F1AP : Sending Ue context Release Command failed");
+ break;
+ }
+
+ ret = ROK;
+ break;
+
+ }
+
+ FreePagingMsg(f1apMsg);
+ return ret;
+}
+
+/*******************************************************************
+ *
+ * @brief Decode received character string into F1AP message