[Epic-ID: ODUHIGH-516][Task-ID: 536] Implementation of Error indication Procedure
[o-du/l2.git] / src / ric_stub / ric_e2ap_msg_hdl.c
index c399f89..0d8555c 100644 (file)
@@ -100,7 +100,7 @@ uint8_t SendE2APMsg(Region region, Pool pool, uint32_t duId)
       if(ODU_ADD_POST_MSG_MULT((Data *)encBuf, encBufSize, mBuf) == ROK)
       {
          ODU_PRINT_MSG(mBuf, 0,0);
+
          if(sctpSend(duId, mBuf) != ROK)
          {
             DU_LOG("\nERROR  -->  E2AP : SCTP Send for E2  failed");
@@ -121,10 +121,228 @@ uint8_t SendE2APMsg(Region region, Pool pool, uint32_t duId)
       DU_LOG("\nERROR  -->  E2AP : Failed to allocate memory");
       return RFAILED;
    }
+
    return ROK;
 } /* SendE2APMsg */
 
+/*******************************************************************
+ *
+ * @brief deallocate memory allocated in E2 Node Config Update Failure
+ *
+ * @details
+ *
+ *    Function : FreeE2ConfigUpdateFail
+ *
+ *    Functionality: deallocate memory allocated in E2 Node Config Update Failure
+ *
+ * @params[in] E2AP_PDU_t *e2apMsg
+ *
+ * @return void
+ * ****************************************************************/
+
+void FreeE2ConfigUpdateFail(E2AP_PDU_t *e2apMsg)
+{
+   uint8_t arrIdx = 0;
+   E2nodeConfigurationUpdateFailure_t *e2NodeCfgUpdFail=NULL;
+
+   if(e2apMsg)
+   {
+      if(e2apMsg->choice.unsuccessfulOutcome)
+      {
+         e2NodeCfgUpdFail = &e2apMsg->choice.unsuccessfulOutcome->value.choice.E2nodeConfigurationUpdateFailure;
+         if(e2NodeCfgUpdFail->protocolIEs.list.array)
+         {
+            for(arrIdx=0; arrIdx<e2NodeCfgUpdFail->protocolIEs.list.count; arrIdx++)
+            {
+               RIC_FREE(e2NodeCfgUpdFail->protocolIEs.list.array[arrIdx], sizeof(E2nodeConfigurationUpdateFailure_IEs_t));
+            }
+            RIC_FREE(e2NodeCfgUpdFail->protocolIEs.list.array, e2NodeCfgUpdFail->protocolIEs.list.size);
+         }
+         RIC_FREE(e2apMsg->choice.unsuccessfulOutcome, sizeof(UnsuccessfulOutcomeE2_t));
+      }
+      RIC_FREE(e2apMsg, sizeof(E2AP_PDU_t));
+   }
+}
+
+/*******************************************************************
+ *
+ * @brief Buld and send the E2 Node Config Update failure
+ *
+ * @details
+ *
+ *    Function : BuildAndSendE2NodeConfigUpdateFailure
+ *
+ *    Functionality:
+ *         - Buld and send the E2 Node Config Update failure
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ * ****************************************************************/
+
+uint8_t BuildAndSendE2NodeConfigUpdateFailure(uint32_t duId, uint8_t transId, uint8_t causeInfo, uint8_t causeReason)
+{
+   E2AP_PDU_t         *e2apMsg = NULL;
+   asn_enc_rval_t     encRetVal;
+   uint8_t            arrIdx=0;
+   uint8_t            elementCnt=0;
+   bool  memAllocFailed = false;
+   E2nodeConfigurationUpdateFailure_t *e2NodeCfgUpdateFail=NULL;
+
+   DU_LOG("\nINFO   -->  E2AP : Building E2 Node Config Update failure\n");
+   while(true)
+   {
+      RIC_ALLOC(e2apMsg, sizeof(E2AP_PDU_t));
+      if(e2apMsg == NULLP)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Memory allocation for E2AP-PDU failed");
+         break;
+      }
+      e2apMsg->present =  E2AP_PDU_PR_unsuccessfulOutcome;
+      RIC_ALLOC(e2apMsg->choice.unsuccessfulOutcome , sizeof(struct UnsuccessfulOutcomeE2));
+      if(e2apMsg->choice.unsuccessfulOutcome == NULLP)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Memory allocation for E2AP-PDU failed");
+         break;
+      }
+
+      e2apMsg->choice.unsuccessfulOutcome->procedureCode = ProcedureCodeE2_id_E2nodeConfigurationUpdate;
+      e2apMsg->choice.unsuccessfulOutcome->criticality = CriticalityE2_reject;
+      e2apMsg->choice.unsuccessfulOutcome->value.present = UnsuccessfulOutcomeE2__value_PR_E2nodeConfigurationUpdateFailure;
+      e2NodeCfgUpdateFail = &e2apMsg->choice.unsuccessfulOutcome->value.choice.E2nodeConfigurationUpdateFailure;
+
+      elementCnt = 3;
+      e2NodeCfgUpdateFail->protocolIEs.list.count = elementCnt;
+      e2NodeCfgUpdateFail->protocolIEs.list.size  = elementCnt * sizeof(struct E2nodeConfigurationUpdateFailure_IEs *);
+
+      RIC_ALLOC(e2NodeCfgUpdateFail->protocolIEs.list.array, e2NodeCfgUpdateFail->protocolIEs.list.size);
+      if(e2NodeCfgUpdateFail->protocolIEs.list.array == NULLP)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Memory allocation for E2 node config update failure array failed");
+         break;
+      }
+
+      for(arrIdx=0; arrIdx<elementCnt; arrIdx++)
+      {
+         RIC_ALLOC(e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx], sizeof(struct E2nodeConfigurationUpdateFailure_IEs));
+         if(e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx] == NULLP)
+         {
+            DU_LOG("\nERROR  -->  E2AP : Memory allocation for E2 node config update failure IEs failed");
+            memAllocFailed = true;
+            break;
+         }
+      }
+
+      if(memAllocFailed == true)
+      {
+          break;
+      }
+
+      /* Trans Id */
+      arrIdx = 0;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->id = ProtocolIE_IDE2_id_TransactionID;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->criticality = CriticalityE2_reject;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->value.present = E2setupFailureIEs__value_PR_TransactionID;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->value.choice.TransactionID  = transId;
+
+      arrIdx++;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->id = ProtocolIE_IDE2_id_CauseE2;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->criticality = CriticalityE2_reject;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->value.present = E2setupFailureIEs__value_PR_CauseE2;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->value.choice.CauseE2.present = causeInfo;
+      if(causeInfo == CauseE2_PR_e2Node) 
+         e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->value.choice.CauseE2.choice.e2Node = causeReason;
+      else
+         e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->value.choice.CauseE2.choice.misc = causeReason;
+
+      arrIdx++;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->id = ProtocolIE_IDE2_id_TimeToWaitE2;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->criticality = CriticalityE2_ignore;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->value.present = E2setupFailureIEs__value_PR_TimeToWaitE2;
+      e2NodeCfgUpdateFail->protocolIEs.list.array[arrIdx]->value.choice.TimeToWaitE2 = TimeToWaitE2_v5s;
+
+      xer_fprint(stdout, &asn_DEF_E2AP_PDU, e2apMsg);
+      memset(encBuf, 0, ENC_BUF_MAX_LEN);
+      encBufSize = 0;
+      encRetVal = aper_encode(&asn_DEF_E2AP_PDU, 0, e2apMsg, PrepFinalEncBuf, encBuf);
+
+      /* Check encode results */
+      if(encRetVal.encoded == ENCODE_FAIL)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Could not encode E2 Node Config Update failure structure (at %s)\n",\
+               encRetVal.failed_type ? encRetVal.failed_type->name : "unknown");
+         break;
+      }
+      else
+      {
+         DU_LOG("\nDEBUG  -->  E2AP : Created APER encoded buffer for E2 Node Config Update Failure\n");
+         for(int i=0; i< encBufSize; i++)
+         {
+            DU_LOG("%x",encBuf[i]);
+         }
+      }
+
+      if(SendE2APMsg(RIC_APP_MEM_REG, RIC_POOL, duId) != ROK)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Sending E2 Node Config Update Failure failed");
+         break;
+      }
+      break;
+   }
+
+   FreeE2ConfigUpdateFail(e2apMsg);
+   return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief process the E2 node configuration update
+ *
+ * @details
+ *
+ *    Function : ProcE2NodeConfigUpdate 
+ *
+ * Functionality: Process E2 node configuration update
+ *
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ ******************************************************************/
+
+void ProcE2NodeConfigUpdate(uint32_t duId, E2nodeConfigurationUpdate_t *e2NodeConfigUpdate)
+{
+   uint8_t ieIdx = 0, duIdx = 0;
+   uint8_t transId = 0, e2NodeUpdateListIdx=0;
+   DuDb    *duDb = NULLP;
+   E2nodeComponentConfigUpdate_List_t *e2NodeUpdateList=NULLP;
+   E2nodeComponentConfigUpdate_ItemIEs_t *e2NodeUpdateItemIe=NULLP;
+   E2nodeComponentConfigUpdate_Item_t *e2NodeUpdateItem =NULLP;
+
+   if(e2NodeConfigUpdate)
+   {
+      if(e2NodeConfigUpdate->protocolIEs.list.array)
+      {
+         for(ieIdx=0; ieIdx < e2NodeConfigUpdate->protocolIEs.list.count; ieIdx++)
+         {
+            if(e2NodeConfigUpdate->protocolIEs.list.array[ieIdx])
+            {
+               switch(e2NodeConfigUpdate->protocolIEs.list.array[ieIdx]->id)
+               {
+                  case ProtocolIE_IDE2_id_TransactionID:
+                     transId = e2NodeConfigUpdate->protocolIEs.list.array[ieIdx]->value.choice.TransactionID;
+                     break;
+                  
+                  default:
+                  {
+                     /*TODO - Other IEs will be handling in next gerrit*/
+                     break;
+                  }
+               }
+            }
+         }
+      }
+   }
+}
+
 /*******************************************************************
  *
  * @brief Builds Global RIC Id Params
@@ -890,7 +1108,7 @@ uint8_t fillActionToBeSetup(RICaction_ToBeSetup_ItemIEs_t *actionItem, RicSubscr
       
       /* RIC Action ID */
       actionItem->value.choice.RICaction_ToBeSetup_Item.ricActionID = ++ricActionId;
-      ricSubsDb->actionSequence[ricSubsDb->numOfActions].id = \
+      ricSubsDb->actionSequence[ricActionId-1].id = \
          actionItem->value.choice.RICaction_ToBeSetup_Item.ricActionID;
 
       /* RIC Action Type */
@@ -913,7 +1131,7 @@ uint8_t fillActionToBeSetup(RICaction_ToBeSetup_ItemIEs_t *actionItem, RicSubscr
       return ROK;
    }
 
-   memset(&ricSubsDb->actionSequence[ricSubsDb->numOfActions], 0, sizeof(ActionInfo));
+   memset(&ricSubsDb->actionSequence[ricActionId-1], 0, sizeof(ActionInfo));
    return RFAILED;
 }
 
@@ -1110,7 +1328,6 @@ uint8_t BuildAndSendRicSubscriptionReq(DuDb *duDb)
    RICsubscriptionRequest_t   *ricSubscriptionReq;
    uint8_t         elementCnt;
    uint8_t         idx;
-   uint8_t         ieId;
    asn_enc_rval_t  encRetVal;        /* Encoder return value */
    RanFunction     *ranFuncDb = &duDb->ranFunction[0];
 
@@ -1171,7 +1388,7 @@ uint8_t BuildAndSendRicSubscriptionReq(DuDb *duDb)
       if(BuildNewRicRequestId(&ricSubscriptionReq->protocolIEs.list.array[idx]->value.choice.RICrequestID, \
          &ranFuncDb->subscriptionList[ranFuncDb->numOfSubscription].requestId) != ROK)
       {
-         DU_LOG("\nERROR  -->  E2AP : Failed at [%d] : Line [%d]", __func__, __LINE__);
+         DU_LOG("\nERROR  -->  E2AP : Failed at [%s] : Line [%d]", __func__, __LINE__);
          break;
       }
 
@@ -1193,7 +1410,7 @@ uint8_t BuildAndSendRicSubscriptionReq(DuDb *duDb)
       if(BuildRicSubsDetails(&(ricSubscriptionReq->protocolIEs.list.array[idx]->value.choice.RICsubscriptionDetails),\
          &ranFuncDb->subscriptionList[ranFuncDb->numOfSubscription]) != ROK)
       {
-         DU_LOG("\nERROR  -->  E2AP : Failed at [%d] : Line [%d]", __func__, __LINE__);
+         DU_LOG("\nERROR  -->  E2AP : Failed at [%s] : Line [%d]", __func__, __LINE__);
          break;
       }
 
@@ -1250,16 +1467,98 @@ uint8_t BuildAndSendRicSubscriptionReq(DuDb *duDb)
  *
  ******************************************************************/
 
-void ProcRicSubscriptionResponse(uint32_t duId)
+void ProcRicSubscriptionResponse(uint32_t duId, RICsubscriptionResponse_t  *ricSubscriptionRsp)
 {
-   uint8_t duIdx = 0;
-   DuDb *duDb;
+   uint8_t duIdx = 0, ieIdx = 0,subsIdx = 0, notAdmitIdx = 0;
+   uint8_t ranFuncId = 0, actionId = 0;
+   DuDb *duDb = NULLP;
+   bool ricReqIdDecoded = false;
+   RicRequestId ricReqId;
+   RanFunction  *ranFuncDb = NULLP;
+   RICsubscriptionResponse_IEs_t *ricSubsRspIe = NULLP;
+   RICaction_NotAdmitted_List_t *notAdmitList = NULLP;
+
+   DU_LOG("\nINFO  -->  E2AP : RIC Subscription Response received");
+
+   /* Fetch DU DB */
+   SEARCH_DU_DB(duIdx, duId, duDb);
+   if(duDb == NULLP)
+   {
+      DU_LOG("\nERROR  -->  E2AP : duDb is not present for duId %d",duId);
+      return;
+   }
 
-   DU_LOG("\nINFO  -->  E2AP : RICsubscriptionResponse Msg Acknowledged");
+   memset(&ricReqId, 0, sizeof(RicRequestId));
+   if(ricSubscriptionRsp)
+   {
+      if(ricSubscriptionRsp->protocolIEs.list.array)
+      {
+         for(ieIdx=0; ieIdx<ricSubscriptionRsp->protocolIEs.list.count; ieIdx++)
+         {
+            if(ricSubscriptionRsp->protocolIEs.list.array[ieIdx])
+            {
+               ricSubsRspIe = ricSubscriptionRsp->protocolIEs.list.array[ieIdx];
+               switch(ricSubscriptionRsp->protocolIEs.list.array[ieIdx]->id)
+               {
+                  case ProtocolIE_IDE2_id_RICrequestID:
+                     {
+                        ricReqId.requestorId = ricSubsRspIe->value.choice.RICrequestID.ricRequestorID;
+                        ricReqId.instanceId = ricSubsRspIe->value.choice.RICrequestID.ricInstanceID;
+                        ricReqIdDecoded = true;
+                        break;
+                     }
+                  case ProtocolIE_IDE2_id_RANfunctionID:
+                     {
+                        ranFuncId = ricSubsRspIe->value.choice.RANfunctionID;
+                        if(duDb->ranFunction[ranFuncId-1].id == ranFuncId)
+                        {
+                           ranFuncDb = &duDb->ranFunction[ranFuncId-1];
+                        }
+                        else
+                        {
+                           DU_LOG("\nERROR  -->  E2AP : ProcRicSubscriptionResponse: RAN Function ID [%d] not found", ranFuncId);
+                           return;
+                        }
+                        break; 
+                     }
+                  case ProtocolIE_IDE2_id_RICactions_Admitted:
+                     {
+                        break;
+                     }
+                  case ProtocolIE_IDE2_id_RICactions_NotAdmitted:
+                     {
+                        if(!(ranFuncDb && ricReqIdDecoded))
+                           return;
 
-   SEARCH_DU_DB(duIdx, duId, duDb);
-   if(duDb)
-      duDb->ricSubscribedToDu = true;
+                        notAdmitList = &ricSubsRspIe->value.choice.RICaction_NotAdmitted_List;
+                        for(notAdmitIdx = 0; notAdmitIdx < notAdmitList->list.count; notAdmitIdx++)
+                        {
+                           actionId = ((RICaction_NotAdmitted_ItemIEs_t *)(notAdmitList->list.array[notAdmitIdx]))->\
+                              value.choice.RICaction_NotAdmitted_Item.ricActionID;
+
+                              /* Remove action from RAN Function's subscription list */
+                              for(subsIdx = 0; subsIdx < ranFuncDb->numOfSubscription; subsIdx++)
+                              {
+                                 if((ranFuncDb->subscriptionList[subsIdx].requestId.requestorId == ricReqId.requestorId) &&
+                                       (ranFuncDb->subscriptionList[subsIdx].requestId.instanceId == ricReqId.instanceId))
+                                 {
+                                    if(ranFuncDb->subscriptionList[subsIdx].actionSequence[actionId-1].id == actionId)
+                                    {
+                                       memset(&ranFuncDb->subscriptionList[subsIdx].actionSequence[actionId-1], 0, \
+                                          sizeof(ActionInfo));
+                                       ranFuncDb->subscriptionList[subsIdx].numOfActions--;
+                                       break;
+                                    }
+                                 }
+                              }
+                        }
+                        break;
+                     }
+               }
+            }
+         }
+      }
+   } 
 }
 
 /*******************************************************************
@@ -1493,8 +1792,8 @@ uint8_t ProcE2SetupReq(uint32_t *duId, E2setupRequest_t  *e2SetupReq)
                            {
                               ranFuncItemIe = (RANfunction_ItemIEs_t *) ranFunctionsList->list.array[ranFuncIdx]; 
                               ranFunItem = &ranFuncItemIe->value.choice.RANfunction_Item;
-                              duDb->ranFunction[duDb->numOfRanFunction].id = ranFunItem->ranFunctionID; 
-                              duDb->ranFunction[duDb->numOfRanFunction].revisionCounter = ranFunItem->ranFunctionRevision; 
+                              duDb->ranFunction[ranFunItem->ranFunctionID-1].id = ranFunItem->ranFunctionID; 
+                              duDb->ranFunction[ranFunItem->ranFunctionID-1].revisionCounter = ranFunItem->ranFunctionRevision; 
                               duDb->numOfRanFunction++;
                            }
                         }
@@ -1539,159 +1838,6 @@ uint8_t ProcE2SetupReq(uint32_t *duId, E2setupRequest_t  *e2SetupReq)
    }
    return ROK;   
 }
-
-/*******************************************************************
- *
- * @brief Deallocate the memory allocated for E2nodeConfigurationUpdate msg 
- *
- * @details
- *
- *    Function : FreeE2NodeConfigUpdate 
- *
- *    Functionality:
- *       - freeing the memory allocated for E2nodeConfigurationUpdate
- *
- * @params[in] E2AP_PDU_t *e2apMsg 
- * @return ROK     - success
- *         RFAILED - failure
- *
- * ****************************************************************/
-void FreeE2NodeConfigUpdateAck(E2AP_PDU_t *e2apMsg)
-{
-   uint8_t arrIdx =0;
-   E2nodeConfigurationUpdate_t *e2NodeConfigUpdateAck;
-
-   if(e2apMsg != NULLP)
-   {
-      if(e2apMsg->choice.successfulOutcome != NULLP)
-      {
-         e2NodeConfigUpdateAck = &e2apMsg->choice.successfulOutcome->value.choice.E2nodeConfigurationUpdateAcknowledge;
-         if(e2NodeConfigUpdateAck->protocolIEs.list.array != NULLP)
-         {
-            for(arrIdx = 0; arrIdx < e2NodeConfigUpdateAck->protocolIEs.list.count; arrIdx++)
-            {
-               RIC_FREE(e2NodeConfigUpdateAck->protocolIEs.list.array[arrIdx], sizeof(E2nodeConfigurationUpdate_t));
-            }
-            RIC_FREE(e2NodeConfigUpdateAck->protocolIEs.list.array, e2NodeConfigUpdateAck->protocolIEs.list.size);
-         }
-         RIC_FREE(e2apMsg->choice.successfulOutcome, sizeof(SuccessfulOutcomeE2_t));
-      }
-      RIC_FREE(e2apMsg, sizeof(E2AP_PDU_t));
-   }
-}
-
-/*******************************************************************
- *
- * @brief Buld and send the E2 node config update msg 
- *
- * @details
- *
- *    Function : BuildAndSendE2NodeConfigUpdate
- *
- *    Functionality:
- *         - Buld and send the E2 node config update msg
- * @return ROK     - success
- *         RFAILED - failure
- *
- * ****************************************************************/
-
-uint8_t BuildAndSendE2NodeConfigUpdateAck(uint32_t duId)
-{
-   uint8_t arrIdx = 0,elementCnt = 1;
-   uint8_t ret = ROK;
-   E2AP_PDU_t        *e2apMsg = NULLP;
-   E2nodeConfigurationUpdateAcknowledge_t *e2NodeConfigUpdateAck = NULLP;
-   asn_enc_rval_t     encRetVal;       /* Encoder return value */
-
-   DU_LOG("\nINFO   -->  E2AP : Building E2 Node config update Ack Message\n");
-   do
-   {
-      RIC_ALLOC(e2apMsg, sizeof(E2AP_PDU_t));
-      if(e2apMsg == NULLP)
-      {
-         DU_LOG("\nERROR  -->  E2AP : Memory allocation for E2AP-PDU failed");
-         break;
-      }
-      e2apMsg->present = E2AP_PDU_PR_successfulOutcome;
-      RIC_ALLOC(e2apMsg->choice.successfulOutcome, sizeof(SuccessfulOutcomeE2_t));
-      if(e2apMsg->choice.successfulOutcome == NULLP)
-      {
-         DU_LOG("\nERROR  -->  E2AP : Memory allocation for E2AP-PDU failed");
-         RIC_FREE(e2apMsg, sizeof(E2AP_PDU_t));
-         return RFAILED;
-      }
-      
-      e2apMsg->choice.successfulOutcome->criticality = CriticalityE2_reject;
-      e2apMsg->choice.successfulOutcome->procedureCode = ProcedureCodeE2_id_E2nodeConfigurationUpdate;
-      e2apMsg->choice.successfulOutcome->value.present = SuccessfulOutcomeE2__value_PR_E2nodeConfigurationUpdateAcknowledge;
-      e2NodeConfigUpdateAck = &e2apMsg->choice.successfulOutcome->value.choice.E2nodeConfigurationUpdateAcknowledge;
-
-      e2NodeConfigUpdateAck->protocolIEs.list.count = elementCnt;
-      e2NodeConfigUpdateAck->protocolIEs.list.size  = elementCnt * sizeof(E2nodeConfigurationUpdateAcknowledge_IEs_t*);
-      /* Initialize the Ric Indication members */
-      RIC_ALLOC(e2NodeConfigUpdateAck->protocolIEs.list.array, \
-            e2NodeConfigUpdateAck->protocolIEs.list.size);
-      if(e2NodeConfigUpdateAck->protocolIEs.list.array == NULLP)
-      {
-         DU_LOG("\nERROR  -->  E2AP : Memory allocation for e2NodeConfigUpdateAck failed");
-         break;
-      }
-      
-      for(arrIdx =0; arrIdx<elementCnt; arrIdx++)
-      {
-         RIC_ALLOC(e2NodeConfigUpdateAck->protocolIEs.list.array[arrIdx], sizeof(E2nodeConfigurationUpdateAcknowledge_IEs_t));
-         if(e2NodeConfigUpdateAck->protocolIEs.list.array[arrIdx] == NULLP)
-         {
-            
-            DU_LOG("\nERROR  -->  E2AP : Memory allocation for e2NodeConfigUpdateAck failed");
-            break;
-         }
-      }
-
-      arrIdx = 0;
-      /* TransactionID */
-      e2NodeConfigUpdateAck->protocolIEs.list.array[arrIdx]->id = ProtocolIE_IDE2_id_TransactionID;
-      e2NodeConfigUpdateAck->protocolIEs.list.array[arrIdx]->criticality = CriticalityE2_reject;
-      e2NodeConfigUpdateAck->protocolIEs.list.array[arrIdx]->value.present = E2nodeConfigurationUpdateAcknowledge_IEs__value_PR_TransactionID;
-      e2NodeConfigUpdateAck->protocolIEs.list.array[arrIdx]->value.choice.TransactionID = TRANS_ID;
-
-
-      xer_fprint(stdout, &asn_DEF_E2AP_PDU, e2apMsg);
-
-      memset(encBuf, 0, ENC_BUF_MAX_LEN);
-      encBufSize = 0;
-      encRetVal = aper_encode(&asn_DEF_E2AP_PDU, 0, e2apMsg, PrepFinalEncBuf,\
-            encBuf);
-      if(encRetVal.encoded == ENCODE_FAIL)
-      {
-         DU_LOG("\nERROR  -->  E2AP : Could not encode E2 Node config update ack structure (at %s)\n",\
-               encRetVal.failed_type ? encRetVal.failed_type->name : "unknown");
-         return RFAILED;
-      }
-      else
-      {
-         DU_LOG("\nDEBUG  -->  E2AP : Created APER encoded buffer for E2 Node config update ack \n");
-         for(int i=0; i< encBufSize; i++)
-         {
-            DU_LOG("%x",encBuf[i]);
-         } 
-      }
-
-
-      /* Sending msg */
-      if(SendE2APMsg(RIC_APP_MEM_REG, RIC_POOL, duId) != ROK)
-      {
-         DU_LOG("\nERROR  -->  E2AP : Failed to send E2 Node config update ack ");
-         return RFAILED;
-      }
-
-      break;
-   }while(true);
-   
-   FreeE2NodeConfigUpdateAck(e2apMsg);
-   return ret;
-}
-
 /*******************************************************************
  *
  * @brief Deallocate the memory allocated for E2 Reset Response
@@ -2779,6 +2925,290 @@ void ProcRicServiceUpdate(uint32_t duId, RICserviceUpdate_t *ricServiceUpdate)
    }
 }
 
+/*******************************************************************
+ *
+ * @brief Processing RIC subscription failure from DU
+ *
+ * @details
+ *
+ *    Function : ProcRicSubscriptionFailure
+ *
+ * Functionality: Processing RIC subscription failure from DU
+ *
+ * @param  ID of DU from which message was sent
+ *         RIC Subscription failure message
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ ******************************************************************/
+uint8_t ProcRicSubscriptionFailure(uint32_t duId, RICsubscriptionFailure_t *ricSubscriptionFailure)
+{
+   uint8_t ieIdx = 0, duIdx = 0, subsIdx = 0;
+   uint8_t ranFuncId = 0;
+   bool   ricReqIdDecoded = false;
+   DuDb    *duDb = NULLP;
+   RanFunction *ranFuncDb = NULLP;
+   RicRequestId ricReqId;
+   RICsubscriptionFailure_IEs_t *ricSubsFailIe = NULLP;
+
+   DU_LOG("\nINFO  -->  E2AP : Received RIC subscription failure");
+
+   SEARCH_DU_DB(duIdx, duId, duDb);
+   if(duDb == NULLP)
+   {
+      DU_LOG("\nERROR  -->  E2AP : duDb is not present for duId %d",duId);
+      return RFAILED;
+   }
+
+   memset(&ricReqId, 0, sizeof(RicRequestId));
+   if(ricSubscriptionFailure)
+   {
+      if(ricSubscriptionFailure->protocolIEs.list.array)
+      {
+         for(ieIdx=0; ieIdx<ricSubscriptionFailure->protocolIEs.list.count; ieIdx++)
+         {
+            if(ricSubscriptionFailure->protocolIEs.list.array[ieIdx])
+            {
+               ricSubsFailIe = ricSubscriptionFailure->protocolIEs.list.array[ieIdx];
+               switch(ricSubscriptionFailure->protocolIEs.list.array[ieIdx]->id)
+               {
+                  case ProtocolIE_IDE2_id_RICrequestID:
+                  {
+                     ricReqId.requestorId = ricSubsFailIe->value.choice.RICrequestID.ricRequestorID;
+                     ricReqId.instanceId = ricSubsFailIe->value.choice.RICrequestID.ricInstanceID;
+                     ricReqIdDecoded = true;
+                     break;
+                  }
+                  case ProtocolIE_IDE2_id_RANfunctionID:
+                  {
+                     ranFuncId = ricSubsFailIe->value.choice.RANfunctionID;
+                     if(duDb->ranFunction[ranFuncId-1].id == ranFuncId)
+                     {
+                        ranFuncDb = &duDb->ranFunction[ranFuncId-1];
+                     }
+                     break; 
+                  }
+                  case ProtocolIE_IDE2_id_CauseE2:
+                  default:
+                     /* No handling required as of now since this is a stub */
+                     break;
+
+               }
+            }
+         }
+
+         /* Remove subscription entry from RAN Function */
+         if(ranFuncDb && ricReqIdDecoded)
+         {
+            for(subsIdx = 0; subsIdx < ranFuncDb->numOfSubscription; subsIdx++)
+            {
+               if((ranFuncDb->subscriptionList[subsIdx].requestId.requestorId == ricReqId.requestorId) &&
+                     (ranFuncDb->subscriptionList[subsIdx].requestId.instanceId == ricReqId.instanceId))
+               {
+                  memset(&ranFuncDb->subscriptionList[subsIdx], 0, sizeof(RicSubscription));
+                  break;
+               }
+            }
+         }
+      }
+   }
+   return ROK;
+}
+
+/*******************************************************************
+ *
+ * @brief Free the ErrorIndication Message
+ *
+ * @details
+ *
+ *    Function : FreeRicIndication
+ *
+ * Functionality: Free the ErrorIndication Message
+ *
+ * @return void
+ *
+ *
+ ******************************************************************/
+void FreeErrorIndication(E2AP_PDU_t  *e2apMsg)
+{
+   uint8_t arrIdx = 0;
+   ErrorIndicationE2_t *errorIndicationMsg= NULLP;
+
+   if(e2apMsg != NULLP)
+   {
+      if(e2apMsg->choice.initiatingMessage != NULLP)
+      {
+         errorIndicationMsg = &e2apMsg->choice.initiatingMessage->value.choice.ErrorIndicationE2;
+         if(errorIndicationMsg!= NULLP)
+         {
+            if(errorIndicationMsg->protocolIEs.list.array != NULLP)
+            {
+               for(arrIdx=0; arrIdx<errorIndicationMsg->protocolIEs.list.count; arrIdx++)
+               {
+                  RIC_FREE(errorIndicationMsg->protocolIEs.list.array[arrIdx],sizeof(ErrorIndicationE2_t));
+               }
+               RIC_FREE(errorIndicationMsg->protocolIEs.list.array,errorIndicationMsg->protocolIEs.list.size);
+            }
+         }
+         RIC_FREE(e2apMsg->choice.initiatingMessage, sizeof(InitiatingMessageE2_t));
+      }
+      RIC_FREE(e2apMsg, sizeof(E2AP_PDU_t));
+   }
+}
+
+
+/*******************************************************************
+ *
+ * @brief Builds and Send the ErrorIndication Message
+ *
+ * @details
+ *
+ *    Function : BuildAndSendErrorIndication
+ *
+ * Functionality:Fills the ErrorIndication Message
+ *
+ * @params[in] 
+ *    DU id
+ *    Trans id
+ *    Ric req id
+ *    Ran function id
+ *    Reason of failure
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ ******************************************************************/
+
+uint8_t BuildAndSendErrorIndication(uint32_t duId, int8_t transId, RicRequestId requestId, uint16_t ranFuncId, uint8_t reason)
+{
+   uint8_t elementCnt =0, arrIdx=0, ret = RFAILED;
+   E2AP_PDU_t         *e2apMsg = NULLP;
+   ErrorIndicationE2_t *errorIndicationMsg=NULLP;
+   asn_enc_rval_t     encRetVal;        /* Encoder return value */
+
+   while(true)
+   {
+      DU_LOG("\nINFO   -->  E2AP : Building Error Indication Message\n");
+
+      RIC_ALLOC(e2apMsg, sizeof(E2AP_PDU_t));
+      if(e2apMsg == NULLP)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Memory allocation for E2AP-PDU failed in %s at line %d",__func__, __LINE__);
+         break;
+      }
+
+      e2apMsg->present = E2AP_PDU_PR_initiatingMessage;
+      RIC_ALLOC(e2apMsg->choice.initiatingMessage, sizeof(InitiatingMessageE2_t));
+      if(e2apMsg->choice.initiatingMessage == NULLP)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Memory allocation for E2AP-PDU failed in %s at line %d",__func__, __LINE__);
+         break;
+      }
+      e2apMsg->choice.initiatingMessage->procedureCode = ProcedureCodeE2_id_ErrorIndicationE2;
+      e2apMsg->choice.initiatingMessage->criticality = CriticalityE2_reject;
+      e2apMsg->choice.initiatingMessage->value.present = InitiatingMessageE2__value_PR_ErrorIndicationE2;
+
+      errorIndicationMsg = &e2apMsg->choice.initiatingMessage->value.choice.ErrorIndicationE2;
+
+      /* Element count is 2 for TransactionID/RICrequestID and Cause.
+       * If the RAN function id is present, the count will be increased.*/
+      elementCnt = 2;
+      if(ranFuncId>0)
+         elementCnt++;
+
+      errorIndicationMsg->protocolIEs.list.count = elementCnt;
+      errorIndicationMsg->protocolIEs.list.size = elementCnt * sizeof(ErrorIndicationE2_IEs_t*);
+
+      /* Initialize the E2Setup members */
+      RIC_ALLOC(errorIndicationMsg->protocolIEs.list.array, errorIndicationMsg->protocolIEs.list.size);
+      if(errorIndicationMsg->protocolIEs.list.array == NULLP)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Memory allocation failed for array elements in %s at line %d",__func__, __LINE__);
+         break;
+      }
+      for(arrIdx = 0; arrIdx < elementCnt; (arrIdx)++)
+      {
+         RIC_ALLOC(errorIndicationMsg->protocolIEs.list.array[arrIdx], sizeof(ErrorIndicationE2_IEs_t));
+         if(errorIndicationMsg->protocolIEs.list.array[arrIdx] == NULLP)
+         {
+            DU_LOG("\nERROR  -->  E2AP : Memory allocation failed for array Idx %d in %s at line %d",arrIdx,__func__, __LINE__);
+            break;
+         }
+      }
+      if(arrIdx < elementCnt)
+         break;
+
+      arrIdx = 0;
+
+      if(transId >=0 && transId<=255)
+      {
+         /* TransactionID */
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->id = ProtocolIE_IDE2_id_TransactionID;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->criticality = CriticalityE2_reject;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.present = ErrorIndicationE2_IEs__value_PR_TransactionID;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.choice.TransactionID = transId;
+      }
+      else
+      {
+         /* RICrequestID */
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->id = ProtocolIE_IDE2_id_RICrequestID;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->criticality = CriticalityE2_reject;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.present = ErrorIndicationE2_IEs__value_PR_RICrequestID;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.choice.RICrequestID.ricRequestorID = requestId.requestorId;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.choice.RICrequestID.ricInstanceID = requestId.instanceId;
+      }
+      
+      if(ranFuncId>0)
+      {
+         /* RAN Function ID */
+         arrIdx++;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->id = ProtocolIE_IDE2_id_RANfunctionID;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->criticality = CriticalityE2_reject;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.present = ErrorIndicationE2_IEs__value_PR_RANfunctionID;
+         errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.choice.RANfunctionID = ranFuncId;
+      }
+     
+      /* Cause */
+      arrIdx++;
+      errorIndicationMsg->protocolIEs.list.array[arrIdx]->id = ProtocolIE_IDE2_id_CauseE2;
+      errorIndicationMsg->protocolIEs.list.array[arrIdx]->criticality = CriticalityE2_ignore;
+      errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.present = ErrorIndicationE2_IEs__value_PR_CauseE2;
+      fillE2FailureCause(&errorIndicationMsg->protocolIEs.list.array[arrIdx]->value.choice.CauseE2, CauseE2_PR_misc, reason);
+
+
+      /* Prints the Msg formed */
+      xer_fprint(stdout, &asn_DEF_E2AP_PDU, e2apMsg);
+      memset(encBuf, 0, ENC_BUF_MAX_LEN);
+      encBufSize = 0;
+      encRetVal = aper_encode(&asn_DEF_E2AP_PDU, 0, e2apMsg, PrepFinalEncBuf,\
+            encBuf);
+      if(encRetVal.encoded == ENCODE_FAIL)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Could not encode Error Indication Message (at %s)\n",\
+               encRetVal.failed_type ? encRetVal.failed_type->name : "unknown");
+         break;
+      }
+      else
+      {
+         DU_LOG("\nDEBUG  -->  E2AP : Created APER encoded buffer for Error Indication Message \n");
+#ifdef DEBUG_ASN_PRINT
+         for(int i=0; i< encBufSize; i++)
+         {
+            printf("%x",encBuf[i]);
+         }
+#endif
+      }
+
+      if(SendE2APMsg(RIC_APP_MEM_REG, RIC_POOL, duId) != ROK)
+      {
+         DU_LOG("\nINFO   -->  E2AP : Sending Error Indication Message");
+
+      }
+      ret = ROK;
+      break;
+   }
+   FreeErrorIndication(e2apMsg);
+   return ret;
+}
 
 /*******************************************************************
 *
@@ -2861,7 +3291,7 @@ void E2APMsgHdlr(uint32_t *duId, Buffer *mBuf)
                case InitiatingMessageE2__value_PR_E2nodeConfigurationUpdate:
                   {
                      DU_LOG("\nINFO  -->  E2AP : E2 node config update received");
-                     BuildAndSendE2NodeConfigUpdateAck(*duId);
+                     ProcE2NodeConfigUpdate(*duId, &e2apMsg->choice.initiatingMessage->value.choice.E2nodeConfigurationUpdate);
                      break;
                   }
                case InitiatingMessageE2__value_PR_ResetRequestE2:
@@ -2881,10 +3311,15 @@ void E2APMsgHdlr(uint32_t *duId, Buffer *mBuf)
                      ProcRicServiceUpdate(*duId,  &e2apMsg->choice.initiatingMessage->value.choice.RICserviceUpdate);
                      break;
                   }
-
+               case InitiatingMessageE2__value_PR_ErrorIndicationE2:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : Error indication received");
+                     break;
+                  }
                default:
                   {
-                     DU_LOG("\nERROR  -->  E2AP : Invalid type of intiating message [%d]",e2apMsg->choice.initiatingMessage->value.present);
+                     DU_LOG("\nERROR  -->  E2AP : Invalid type of intiating message [%d]", \
+                        e2apMsg->choice.initiatingMessage->value.present);
                      return;
                   }
             }/* End of switch(initiatingMessage) */
@@ -2896,18 +3331,39 @@ void E2APMsgHdlr(uint32_t *duId, Buffer *mBuf)
             {
                case SuccessfulOutcomeE2__value_PR_RICsubscriptionResponse:  
                   {
-                     ProcRicSubscriptionResponse(*duId);
+                     ProcRicSubscriptionResponse(*duId, \
+                        &e2apMsg->choice.successfulOutcome->value.choice.RICsubscriptionResponse);
                      break;
                   }
                default:
                   {
-                     DU_LOG("\nERROR  -->  E2AP : Invalid type of successfulOutcome message [%d]",e2apMsg->choice.successfulOutcome->value.present);
+                     DU_LOG("\nERROR  -->  E2AP : Invalid type of successfulOutcome message [%d]", \
+                        e2apMsg->choice.successfulOutcome->value.present);
                      return;
                   }
                   break;
             }
             break; 
          }
+         case E2AP_PDU_PR_unsuccessfulOutcome:
+         {
+            switch(e2apMsg->choice.successfulOutcome->value.present)
+            {
+               case UnsuccessfulOutcomeE2__value_PR_RICsubscriptionFailure:
+                  {
+                     ProcRicSubscriptionFailure(*duId, \
+                        &e2apMsg->choice.unsuccessfulOutcome->value.choice.RICsubscriptionFailure);
+                     break;
+                  }
+               default:
+                  {
+                     DU_LOG("\nERROR  -->  E2AP : Invalid type of unsuccessfulOutcome message [%d]", \
+                        e2apMsg->choice.unsuccessfulOutcome->value.present);
+                     return;
+                  }
+            }
+            break;
+         }
       default:
          {
             DU_LOG("\nERROR  -->  E2AP : Invalid type message type ");