[Epic-ID: ODUHIGH-516][Task-ID: ODUHIGH-532] RIC Subscription Delete Rsp
[o-du/l2.git] / src / ric_stub / ric_e2ap_msg_hdl.c
index e9bc3f5..f9540ce 100644 (file)
@@ -42,6 +42,7 @@
 #include "E2SM-KPM-ActionDefinition.h"
 #include "E2SM-KPM-EventTriggerDefinition-Format1.h"
 #include "E2SM-KPM-EventTriggerDefinition.h"
+#include "E2connectionUpdate-Item.h"
 
 /*******************************************************************
  *
@@ -5982,6 +5983,36 @@ void ProcE2RemovalFailure(E2RemovalFailure_t *e2RemovalFailure)
       }
    }
 }
+/*******************************************************************
+ *
+ * @brief Delete E2 component node list
+ *
+ * @details
+ *
+ *    Function : deleteE2ComponentNodeList 
+ *
+ * Functionality: Delete E2 component node  list
+ *
+ * @params[in] E2 component node list
+ * @return void
+
+ *
+ ******************************************************************/
+
+void deleteE2ComponentNodeList(CmLListCp *componentList)
+{
+   E2NodeComponent *cfgInfo = NULLP;
+   CmLList *e2ComponentNode = NULLP;
+
+   CM_LLIST_FIRST_NODE(componentList, e2ComponentNode);
+   while(e2ComponentNode)
+   {
+      cfgInfo = (E2NodeComponent*)e2ComponentNode->node;
+      cmLListDelFrm(componentList, e2ComponentNode);
+      memset(cfgInfo, 0, sizeof(E2NodeComponent));
+      CM_LLIST_FIRST_NODE(componentList, e2ComponentNode);
+   }
+}
 
 /*******************************************************************
  *
@@ -6013,8 +6044,7 @@ void deleteE2NodeInfo(DuDb *duDb)
          deleteRicSubscriptionList(&ranFuncDb->subscriptionList);
       }
    }
-
-   cmInetClose(&sctpCb.e2LstnSockFd);
+   deleteE2ComponentNodeList(&duDb->e2NodeComponent);
 }
 
 /*******************************************************************
@@ -6066,8 +6096,10 @@ void ProcE2RemovalResponse(uint32_t duId, E2RemovalResponse_t *removalRsp)
          {
             case ProtocolIE_IDE2_id_TransactionID:
                {
+                  DU_LOG("\nINFO  -->  E2AP : Sending request to close the sctp connection");
+                  cmInetClose(&sctpCb.e2LstnSockFd);
                   deleteE2NodeInfo(duDb);
-                  break;
+                  exit(0);
                }
             default:
                {
@@ -6400,7 +6432,6 @@ uint8_t BuildAndSendRemovalResponse(uint32_t duId, uint16_t transId)
    }while(true);
 
    FreeE2RemovalResponse(e2apMsg);
-   deleteE2NodeInfo(duDb);
    return ret;
 }
 
@@ -6462,140 +6493,868 @@ void procE2RemovalRequest(uint32_t duId, E2RemovalRequest_t *removalReq)
 }
 
 /*******************************************************************
-*
-* @brief Handles received E2AP message and sends back response  
-*
-* @details
-*
-*    Function : E2APMsgHdlr
-*
-*    Functionality:
-*         - Decodes received E2AP control message
-*         - Prepares response message, encodes and sends to SCTP
-*
-* @params[in] 
-* @return ROK     - success
-*         RFAILED - failure
-*
-* ****************************************************************/
-void E2APMsgHdlr(uint32_t *duId, Buffer *mBuf)
+ *
+ * @brief fill E2 connection update item
+ *
+ * @details
+ *
+ *    Function : fillE2connectionUpdateItem 
+ *
+ *    Functionality: fill E2 connection update item
+ *
+ * @params[in]
+ *    E2connectionUpdate Item to be filled
+ *    Protocol Id
+ * @return ROK - success
+ *         RFAILED - failure
+ * ****************************************************************/
+
+uint8_t fillE2connectionUpdateItem(PTR connectionInfo, uint8_t protocolId)
 {
-   int             i;
-   char            *recvBuf;
-   MsgLen          copyCnt;
-   MsgLen          recvBufLen;
-   E2AP_PDU_t      *e2apMsg;
-   asn_dec_rval_t  rval; /* Decoder return value */
-   E2AP_PDU_t      e2apasnmsg ;
-   DU_LOG("\nINFO  -->  E2AP : Received E2AP message buffer");
-   ODU_PRINT_MSG(mBuf, 0,0);
-   /* Copy mBuf into char array to decode it */
-   ODU_GET_MSG_LEN(mBuf, &recvBufLen);
-   RIC_ALLOC(recvBuf, (Size)recvBufLen);
+   E2connectionUpdateRemove_Item_t *connectionRemoveITem=NULLP;
+   E2connectionUpdate_Item_t *connectionModifyItem=NULLP;
+   TNLinformation_t *tnlInformation = NULLP;
+   TNLusage_t  *tnlUsage=NULLP;
 
-   if(recvBuf == NULLP)
+   switch(protocolId)
    {
-      DU_LOG("\nERROR  -->  E2AP : Memory allocation failed");
-      return;
+      case ProtocolIE_IDE2_id_E2connectionUpdate_Item:
+      {
+         connectionModifyItem = (E2connectionUpdate_Item_t*)connectionInfo;
+         tnlInformation = &connectionModifyItem->tnlInformation;
+         tnlUsage = &connectionModifyItem->tnlUsage;
+         break;
+      }
+
+      case ProtocolIE_IDE2_id_E2connectionUpdateRemove_Item:
+      {
+         connectionRemoveITem = (E2connectionUpdateRemove_Item_t*)connectionInfo;
+         tnlInformation= &connectionRemoveITem->tnlInformation;
+         break;
+      }
    }
-   if(ODU_COPY_MSG_TO_FIX_BUF(mBuf, 0, recvBufLen, (Data *)recvBuf, &copyCnt) != ROK)
+   
+   tnlInformation->tnlAddress.size =  4*sizeof(uint8_t);
+   RIC_ALLOC(tnlInformation->tnlAddress.buf, tnlInformation->tnlAddress.size);
+   if(!tnlInformation->tnlAddress.buf)
    {
-      DU_LOG("\nERROR  -->  E2AP : Failed while copying %d", copyCnt);
-      return;
+      DU_LOG("\nERROR  -->  E2AP : Memory allocation failed in %s at line %d", __func__, __LINE__);
+      return RFAILED;
+   }
+   
+   tnlInformation->tnlAddress.buf[3] =  ricCb.ricCfgParams.sctpParams.localIpAddr.ipV4Addr & 0xFF; 
+   tnlInformation->tnlAddress.buf[2] = (ricCb.ricCfgParams.sctpParams.localIpAddr.ipV4Addr>> 8) & 0xFF;
+   tnlInformation->tnlAddress.buf[1] = (ricCb.ricCfgParams.sctpParams.localIpAddr.ipV4Addr>> 16) & 0xFF;
+   tnlInformation->tnlAddress.buf[0] = (ricCb.ricCfgParams.sctpParams.localIpAddr.ipV4Addr>> 24) & 0xFF;
+   tnlInformation->tnlAddress.bits_unused = 0;
+   if(protocolId == ProtocolIE_IDE2_id_E2connectionUpdate_Item)
+   {
+      *tnlUsage = TNLusage_support_function; 
    }
+   return ROK;
+}
 
-   DU_LOG("\nDEBUG  -->  E2AP : Received flat buffer to be decoded : ");
-   for(i=0; i< recvBufLen; i++)
+/*******************************************************************
+ *
+ * @brief Build E2 connection modification list
+ *
+ * @details
+ *
+ *    Function : BuildE2ConnectionModifyList
+ *
+ *    Functionality: Build E2 connection modification list
+ *
+ * @params[in]
+ *    E2 connection modification list to be filled
+ *
+ * @return ROK - success
+ *         RFAILED - failure
+ * ****************************************************************/
+
+uint8_t BuildE2ConnectionModifyList(E2connectionUpdate_List_t *connectionToBeModifyList)
+{
+   uint8_t arrIdx = 0;
+   E2connectionUpdate_ItemIEs_t *connectionModify=NULL;
+
+   connectionToBeModifyList->list.count = 1;
+   connectionToBeModifyList->list.size = connectionToBeModifyList->list.count*sizeof(E2connectionUpdate_ItemIEs_t*);
+   RIC_ALLOC(connectionToBeModifyList->list.array, connectionToBeModifyList->list.size);
+   if(connectionToBeModifyList->list.array)
    {
-        DU_LOG("%x",recvBuf[i]);
+      for(arrIdx = 0; arrIdx< connectionToBeModifyList->list.count; arrIdx++)
+      {
+         RIC_ALLOC(connectionToBeModifyList->list.array[arrIdx], sizeof(E2connectionUpdate_ItemIEs_t));
+         if(connectionToBeModifyList->list.array[arrIdx] == NULLP)
+         {
+            DU_LOG("\nERROR  -->  E2AP : Memory allocation failed in %s at line %d", __func__, __LINE__);
+            return RFAILED;
+         }
+         connectionModify = (E2connectionUpdate_ItemIEs_t*)connectionToBeModifyList->list.array[arrIdx];
+         connectionModify->id = ProtocolIE_IDE2_id_E2connectionUpdate_Item;
+         connectionModify->criticality= CriticalityE2_ignore;
+         connectionModify->value.present = E2connectionUpdate_ItemIEs__value_PR_E2connectionUpdate_Item;
+         if(fillE2connectionUpdateItem((PTR)&connectionModify->value.choice.E2connectionUpdate_Item, ProtocolIE_IDE2_id_E2connectionUpdate_Item) != ROK)
+         {
+            DU_LOG("\nERROR  -->  E2AP : Failed to fill E2 connection update item");
+            return RFAILED;
+         }
+         
+      }
    }
+   else
+   {
+      DU_LOG("\nERROR  -->  E2AP : Memory allocation failed in %s at line %d", __func__, __LINE__);
+      return RFAILED;
+   }
+   return ROK;
+}
 
-   /* Decoding flat buffer into E2AP messsage */
-   e2apMsg = &e2apasnmsg;
-   memset(e2apMsg, 0, sizeof(E2AP_PDU_t));
+/*******************************************************************
+ *
+ * @brief Build E2 connection remove list
+ *
+ * @details
+ *
+ *    Function : BuildE2ConnectionRemoveList
+ *
+ *    Functionality: Build E2 connection remove list
+ *
+ * @params[in]
+ *    E2 connection remove list to be filled
+ *
+ * @return ROK - success
+ *         RFAILED - failure
+ * ****************************************************************/
 
-   rval = aper_decode(0, &asn_DEF_E2AP_PDU, (void **)&e2apMsg, recvBuf, recvBufLen, 0, 0);
-   RIC_FREE(recvBuf, (Size)recvBufLen);
+uint8_t BuildE2ConnectionRemoveList(E2connectionUpdateRemove_List_t *connectionToBeRemoveList)
+{
+   uint8_t arrIdx = 0;
+   E2connectionUpdateRemove_ItemIEs_t *connectionRemove=NULL;
 
-   if(rval.code == RC_FAIL || rval.code == RC_WMORE)
+   connectionToBeRemoveList->list.count = 1;
+   connectionToBeRemoveList->list.size = connectionToBeRemoveList->list.count*sizeof(E2connectionUpdateRemove_ItemIEs_t*);
+   RIC_ALLOC(connectionToBeRemoveList->list.array, connectionToBeRemoveList->list.size);
+   if(connectionToBeRemoveList->list.array)
    {
-      DU_LOG("\nERROR  -->  E2AP : ASN decode failed");
-      return;
+      for(arrIdx = 0; arrIdx< connectionToBeRemoveList->list.count; arrIdx++)
+      {
+         RIC_ALLOC(connectionToBeRemoveList->list.array[arrIdx], sizeof(E2connectionUpdateRemove_ItemIEs_t));
+         if(connectionToBeRemoveList->list.array[arrIdx] == NULLP)
+         {
+            DU_LOG("\nERROR  -->  E2AP : Memory allocation failed in %s at line %d", __func__, __LINE__);
+            return RFAILED;
+         }
+         connectionRemove = (E2connectionUpdateRemove_ItemIEs_t*)connectionToBeRemoveList->list.array[arrIdx];
+         connectionRemove->id = ProtocolIE_IDE2_id_E2connectionUpdateRemove_Item;
+         connectionRemove->criticality= CriticalityE2_ignore;
+         connectionRemove->value.present = E2connectionUpdateRemove_ItemIEs__value_PR_E2connectionUpdateRemove_Item;
+         if(fillE2connectionUpdateItem((PTR)&connectionRemove->value.choice.E2connectionUpdateRemove_Item, ProtocolIE_IDE2_id_E2connectionUpdateRemove_Item) != ROK)
+         {
+            DU_LOG("\nERROR  -->  E2AP : Failed to fill E2 connection update item");
+            return RFAILED;
+         }
+         
+      }
    }
-   DU_LOG("\n");
-   xer_fprint(stdout, &asn_DEF_E2AP_PDU, e2apMsg);
+   else
+   {
+      DU_LOG("\nERROR  -->  E2AP : Memory allocation failed in %s at line %d", __func__, __LINE__);
+      return RFAILED;
+   }
+   return ROK;
+}
 
-   switch(e2apMsg->present)
+/*******************************************************************
+ *
+ * @brief Deallocate the memory allocated for E2ConnectionUpdate msg
+ *
+ * @details
+ *
+ *    Function : FreeE2ConnectionUpdate
+ *
+ *    Functionality:
+ *       - freeing the memory allocated for E2ConnectionUpdate
+ *
+ * @params[in] E2AP_PDU_t *e2apMsg
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ * ****************************************************************/
+void FreeE2ConnectionUpdate(E2AP_PDU_t *e2apMsg)
+{
+   uint8_t ieIdx =0, arrIdx=0;
+   E2connectionUpdate_t  *connectionUpdate = NULLP;
+   E2connectionUpdate_List_t *connectionToBeModifyList = NULLP;
+   E2connectionUpdateRemove_List_t *connectionToBeRemoveList = NULLP;
+
+   if(e2apMsg != NULLP)
    {
-      case E2AP_PDU_PR_initiatingMessage:
+      if(e2apMsg->choice.initiatingMessage != NULLP)
+      {
+         connectionUpdate = &e2apMsg->choice.initiatingMessage->value.choice.E2connectionUpdate;
+         if(connectionUpdate->protocolIEs.list.array)
          {
-            switch(e2apMsg->choice.initiatingMessage->value.present)
+            for(ieIdx = 0; ieIdx < connectionUpdate->protocolIEs.list.count; ieIdx++)
             {
-               case InitiatingMessageE2__value_PR_E2setupRequest:
-                  {
-                     DU_LOG("\nINFO  -->  E2AP : E2 setup request received");
-                     ProcE2SetupReq(duId, &e2apMsg->choice.initiatingMessage->value.choice.E2setupRequest);
-                     break;
-                  }
-               case InitiatingMessageE2__value_PR_E2nodeConfigurationUpdate:
-                  {
-                     DU_LOG("\nINFO  -->  E2AP : E2 node config update received");
-                     ProcE2NodeConfigUpdate(*duId, &e2apMsg->choice.initiatingMessage->value.choice.E2nodeConfigurationUpdate);
-                     break;
-                  }
-               case InitiatingMessageE2__value_PR_ResetRequestE2:
-                  {
-                     DU_LOG("\nINFO  -->  E2AP : E2 Reset Request received");
-                     ProcResetRequest(*duId,  &e2apMsg->choice.initiatingMessage->value.choice.ResetRequestE2);
-                     break;
-                  }
-               case InitiatingMessageE2__value_PR_RICindication:
-                  {
-                     DU_LOG("\nINFO  -->  E2AP : RIC Indication received");
-                     break;
-                  }
-               case InitiatingMessageE2__value_PR_RICserviceUpdate:
-                  {
-                     DU_LOG("\nINFO  -->  E2AP : RIC Service update received");
-                     ProcRicServiceUpdate(*duId,  &e2apMsg->choice.initiatingMessage->value.choice.RICserviceUpdate);
-                     break;
-                  }
-               case InitiatingMessageE2__value_PR_RICsubscriptionModificationRequired:
-                  {
-                     DU_LOG("\nINFO  -->  E2AP : RIC Subscription Modification Required");
-                     ProcRicSubsModReqd(*duId, \
-                           &e2apMsg->choice.initiatingMessage->value.choice.RICsubscriptionModificationRequired);
-                     break;
-                  }
-               case InitiatingMessageE2__value_PR_RICsubscriptionDeleteRequired:
+               if(connectionUpdate->protocolIEs.list.array[ieIdx])
+               {
+                  switch(connectionUpdate->protocolIEs.list.array[ieIdx]->id)
                   {
-                      DU_LOG("\nINFO  -->  E2AP : RIC Subscription Delete Required");
-                      ProcRicSubsDeleteReqd(*duId, \
-                         &e2apMsg->choice.initiatingMessage->value.choice.RICsubscriptionDeleteRequired);
-                      break;
-                  }
+                     case ProtocolIE_IDE2_id_TransactionID:
+                        break;
 
-               case InitiatingMessageE2__value_PR_ErrorIndicationE2:
-                  {
-                     DU_LOG("\nINFO  -->  E2AP : Error indication received");
-                     break;
-                  }
-               case InitiatingMessageE2__value_PR_E2RemovalRequest:
-                  {
-                     DU_LOG("\nINFO  -->  E2AP : E2 Removal request received");
-                     procE2RemovalRequest(*duId,\
-                     &e2apMsg->choice.initiatingMessage->value.choice.E2RemovalRequest);
-                     break;
-                  }
-               default:
-                  {
-                     DU_LOG("\nERROR  -->  E2AP : Invalid type of intiating message [%d]", \
-                        e2apMsg->choice.initiatingMessage->value.present);
-                     return;
+                     case ProtocolIE_IDE2_id_E2connectionUpdateModify:
+                        {
+                           connectionToBeModifyList = &connectionUpdate->protocolIEs.list.array[ieIdx]->value.choice.E2connectionUpdate_List;
+                           if(connectionToBeModifyList->list.array)
+                           {
+                              for(arrIdx = 0; arrIdx < connectionToBeModifyList->list.count; arrIdx++)
+                              {
+                                 RIC_FREE(connectionToBeModifyList->list.array[arrIdx], sizeof(E2connectionUpdate_ItemIEs_t));
+                              }
+                              RIC_FREE(connectionToBeModifyList->list.array, connectionToBeModifyList->list.size);
+                           }
+                           break;
+                        }
+
+                     case ProtocolIE_IDE2_id_E2connectionUpdateRemove:
+                        {
+                           connectionToBeRemoveList = &connectionUpdate->protocolIEs.list.array[ieIdx]->value.choice.E2connectionUpdateRemove_List;
+                           if(connectionToBeRemoveList->list.array)
+                           {
+                              for(arrIdx = 0; arrIdx < connectionToBeRemoveList->list.count; arrIdx++)
+                              {
+                                 RIC_FREE(connectionToBeRemoveList->list.array[arrIdx], sizeof(E2connectionUpdateRemove_ItemIEs_t));
+                              }
+                              RIC_FREE(connectionToBeRemoveList->list.array, connectionToBeRemoveList->list.size);
+                           }
+                           break;
+                        }
                   }
-            }/* End of switch(initiatingMessage) */
+                  RIC_FREE(connectionUpdate->protocolIEs.list.array[ieIdx], sizeof(E2connectionUpdate_IEs_t));
+               }
+            }
+            RIC_FREE(connectionUpdate->protocolIEs.list.array, connectionUpdate->protocolIEs.list.size);
+         }
+         RIC_FREE(e2apMsg->choice.initiatingMessage, sizeof(InitiatingMessageE2_t));
+      }
+      RIC_FREE(e2apMsg, sizeof(E2AP_PDU_t));
+   }
+}
+
+/*******************************************************************
+ *
+ * @brief Buld and send the E2 Connection Update msg
+ *
+ * @details
+ *
+ *    Function : BuildAndSendE2ConnectionUpdate
+ *
+ *    Functionality:
+ *         - Buld and send the E2 Connection Update Message
+ * @params[in] 
+ *    Du Id
+ *    E2 connection to be modify or delete
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ * ****************************************************************/
+
+uint8_t BuildAndSendE2ConnectionUpdate(uint32_t duId, E2Connection connectionInfo)
+{
+   uint8_t ieIdx = 0, elementCnt = 0;
+   uint8_t ret = RFAILED, duIdx =0;
+   DuDb    *duDb = NULLP;
+   E2AP_PDU_t *e2apMsg = NULLP;
+   E2connectionUpdate_t *e2ConnectionUpdate=NULLP;
+   asn_enc_rval_t    encRetVal;       /* Encoder return value */
+
+   DU_LOG("\nINFO   -->  E2AP : Building E2 Connection Update Message\n");
+   do
+   {
+      SEARCH_DU_DB(duIdx, duId, duDb);
+      if(duDb == NULLP)
+      {
+         DU_LOG("\nERROR  -->  E2AP : duDb is not present for duId %d",duId);
+         return RFAILED;
+      }
+   
+      RIC_ALLOC(e2apMsg, sizeof(E2AP_PDU_t));
+      if(e2apMsg == NULLP)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Memory allocation 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 failed in %s at line %d", __func__, __LINE__);
+         break;
+      }
+
+      e2apMsg->choice.initiatingMessage->procedureCode = ProcedureCodeE2_id_E2connectionUpdate;
+      e2apMsg->choice.initiatingMessage->criticality = CriticalityE2_reject;
+      e2apMsg->choice.initiatingMessage->value.present = InitiatingMessageE2__value_PR_E2connectionUpdate;
+      e2ConnectionUpdate = &e2apMsg->choice.initiatingMessage->value.choice.E2connectionUpdate;
+
+      elementCnt = 1;
+      if(connectionInfo == MODIFY_CONNECTION) 
+         elementCnt++;
+      if(connectionInfo == REMOVE_CONNECTION)
+         elementCnt++;
+
+      e2ConnectionUpdate->protocolIEs.list.count = elementCnt;
+      e2ConnectionUpdate->protocolIEs.list.size = elementCnt * sizeof(E2connectionUpdate_IEs_t*);
+      RIC_ALLOC(e2ConnectionUpdate->protocolIEs.list.array, e2ConnectionUpdate->protocolIEs.list.size);
+      if(!e2ConnectionUpdate->protocolIEs.list.array)
+      {
+         DU_LOG("\nERROR  -->  E2AP : Memory allocation failed in %s at line %d", __func__, __LINE__);
+         break;
+      }
+
+      for(ieIdx=0; ieIdx < elementCnt; ieIdx++)
+      {
+         RIC_ALLOC(e2ConnectionUpdate->protocolIEs.list.array[ieIdx], sizeof(E2connectionUpdate_IEs_t));
+         if(!e2ConnectionUpdate->protocolIEs.list.array[ieIdx])
+         {
+            DU_LOG("\nERROR  -->  E2AP : Memory allocation failed in %s at line %d", __func__, __LINE__);
+            break;
+         }
+      }
+      if(ieIdx < elementCnt)
+         break;
+
+      ieIdx = 0;
+      e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->id =  ProtocolIE_IDE2_id_TransactionID;
+      e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->criticality = CriticalityE2_reject;
+      e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->value.present = E2connectionUpdate_IEs__value_PR_TransactionID;
+      e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->value.choice.TransactionID = assignTransactionId(duDb);
+
+      if(connectionInfo == MODIFY_CONNECTION)
+      {
+         ieIdx++;
+         e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->id =  ProtocolIE_IDE2_id_E2connectionUpdateModify;
+         e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->criticality = CriticalityE2_reject;
+         e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->value.present = E2connectionUpdate_IEs__value_PR_E2connectionUpdate_List;
+         if(BuildE2ConnectionModifyList(&e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->value.choice.E2connectionUpdate_List) != ROK)
+         {
+            DU_LOG("\nERROR  -->  E2AP : Failed to build the connection update modify list");
+            break;
+         }
+      }
+      
+      if(connectionInfo == REMOVE_CONNECTION)
+      {
+         ieIdx++;
+         e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->id =  ProtocolIE_IDE2_id_E2connectionUpdateRemove;
+         e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->criticality = CriticalityE2_reject;
+         e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->value.present = E2connectionUpdate_IEs__value_PR_E2connectionUpdateRemove_List;
+         if(BuildE2ConnectionRemoveList(&e2ConnectionUpdate->protocolIEs.list.array[ieIdx]->value.choice.E2connectionUpdateRemove_List) != ROK)
+         {
+            DU_LOG("\nERROR  -->  E2AP : Failed to build the connection update modify list");
+            break;
+         }
+      }
+
+      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 connection update structure (at %s)\n",\
+               encRetVal.failed_type ? encRetVal.failed_type->name : "unknown");
+         break;
+      }
+      else
+      {
+         DU_LOG("\nDEBUG  -->  E2AP : Created APER encoded buffer for E2 Connection Update \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 Connection Update");
+         break;
+      }
+
+      ret = ROK;
+      break;
+   }while(true);
+   
+   FreeE2ConnectionUpdate(e2apMsg);
+   return ret;
+}
+
+/******************************************************************
+ *
+ * @brief Processes the E2 connection update failure msg
+ *
+ * @details
+ *
+ *    Function : procE2connectionUpdateFailure
+ *
+ *    Functionality: Processes the E2 connection update failure msg
+ *
+ * @params[in] 
+ *       E2 connection update failure information
+ *
+ * @return void
+ *
+ * ****************************************************************/
+void ProcE2connectionUpdateFailure(E2connectionUpdateFailure_t *updateFailure) 
+{
+   uint8_t ieIdx = 0;
+   uint16_t transId=0;
+   CauseE2_t *cause = NULLP;
+
+   if(!updateFailure)
+   {
+      DU_LOG("\nERROR  -->  E2AP : updateFailure pointer is null"); 
+      return;
+   }
+
+   if(!updateFailure->protocolIEs.list.array)      
+   {
+      DU_LOG("\nERROR  -->  E2AP : updateFailure array pointer is null");
+      return;
+   }
+   
+   for(ieIdx=0; ieIdx < updateFailure->protocolIEs.list.count; ieIdx++)
+   {
+      if(updateFailure->protocolIEs.list.array[ieIdx])
+      {
+         switch(updateFailure->protocolIEs.list.array[ieIdx]->id)
+         {
+            case ProtocolIE_IDE2_id_TransactionID:
+               {
+                  transId = updateFailure->protocolIEs.list.array[ieIdx]->value.choice.TransactionID;
+                  DU_LOG("\nERROR  -->  E2AP : Received transID %d", transId);
+                  break;
+               }
+            case ProtocolIE_IDE2_id_CauseE2:
+               {
+                   cause = &updateFailure->protocolIEs.list.array[ieIdx]->value.choice.CauseE2;
+                   printE2ErrorCause(cause);
+                   break; 
+               }
+            default:
+               {
+                  DU_LOG("\nERROR  -->  E2AP : Received Invalid Ie [%d]", updateFailure->protocolIEs.list.array[ieIdx]->id);
+                  break;
+               }
+         }
+      }
+   }
+}
+
+/*******************************************************************
+ *
+ * @brief process the E2 Connection update ack
+ *
+ * @details
+ *
+ *    Function : ProcE2ConnectionUpdateAck 
+ *
+ * Functionality: Process E2 Connection update ack 
+ *
+ * @params[in] 
+ *       du Id
+ *       Pointer to Connection update ack 
+ * @return void
+ *
+ ******************************************************************/
+
+void ProcE2ConnectionUpdateAck(uint32_t duId, E2connectionUpdateAcknowledge_t *connectionUpdateAck)
+{
+   uint16_t transId =0;
+   uint32_t ipAddress=0;
+   DuDb *duDb = NULLP;
+   uint8_t ieIdx = 0, duIdx =0, arrIdx=0;
+   E2connectionUpdate_Item_t *connectionSetupItem=NULLP;
+   E2connectionUpdate_ItemIEs_t *connectionSetupItemIe=NULLP;
+   E2connectionUpdate_List_t *connectionSetupList=NULLP;
+   E2connectionSetupFailed_Item_t *setupFailedItem =NULLP;
+   E2connectionSetupFailed_List_t *setupFailedList=NULLP;
+   E2connectionSetupFailed_ItemIEs_t *setupFailedItemIe =NULLP;
+
+   SEARCH_DU_DB(duIdx, duId, duDb);
+   if(duDb == NULLP)
+   {
+      DU_LOG("\nERROR  -->  E2AP : duDb is not present for duId %d",duId);
+      return;
+   }
+
+   if(!connectionUpdateAck)
+   {
+      DU_LOG("\nERROR  -->  E2AP : connectionUpdateAck pointer is null"); 
+      return;
+   }
+
+   if(!connectionUpdateAck->protocolIEs.list.array)      
+   {
+      DU_LOG("\nERROR  -->  E2AP : connectionUpdateAck array pointer is null");
+      return;
+   }
+
+   for(ieIdx=0; ieIdx < connectionUpdateAck->protocolIEs.list.count; ieIdx++)
+   {
+      if(connectionUpdateAck->protocolIEs.list.array[ieIdx])
+      {
+         switch(connectionUpdateAck->protocolIEs.list.array[ieIdx]->id)
+         {
+            case ProtocolIE_IDE2_id_TransactionID:
+               {
+                  transId = connectionUpdateAck->protocolIEs.list.array[arrIdx]->value.choice.TransactionID;
+                  if(transId>255)
+                  {
+                     DU_LOG("\nERROR  -->  E2AP : Received invalid trans id %d ",transId);
+                     return;
+                  }
+                  break;
+               }
+            case ProtocolIE_IDE2_id_E2connectionSetup:
+               {
+                  connectionSetupList=&connectionUpdateAck->protocolIEs.list.array[ieIdx]->value.choice.E2connectionUpdate_List;
+                  if(connectionSetupList->list.array)
+                  {
+                     for(arrIdx = 0; arrIdx< connectionSetupList->list.count; arrIdx++)
+                     {
+                        connectionSetupItemIe = (E2connectionUpdate_ItemIEs_t*)connectionSetupList->list.array[arrIdx];
+                        connectionSetupItem = &connectionSetupItemIe->value.choice.E2connectionUpdate_Item;
+                        bitStringToInt(&connectionSetupItem->tnlInformation.tnlAddress, &ipAddress);
+                        if(ricCb.ricCfgParams.sctpParams.localIpAddr.ipV4Addr == ipAddress)
+                        {
+                            ricCb.ricCfgParams.sctpParams.usage = connectionSetupItem->tnlUsage;
+                        }
+                     }
+                  }
+                  break;
+               }
+
+            case ProtocolIE_IDE2_id_E2connectionSetupFailed:
+               {
+                  setupFailedList=&connectionUpdateAck->protocolIEs.list.array[ieIdx]->value.choice.E2connectionSetupFailed_List;
+                  if(setupFailedList->list.array)
+                  {
+                     for(arrIdx = 0; arrIdx< setupFailedList->list.count; arrIdx++)
+                     {
+                        setupFailedItemIe = (E2connectionSetupFailed_ItemIEs_t*)setupFailedList->list.array[arrIdx];
+                        setupFailedItem = &setupFailedItemIe->value.choice.E2connectionSetupFailed_Item;
+                        printE2ErrorCause(&setupFailedItem->cause);
+                     }
+                  }
+                  break;
+               }
+            default:
+               {
+                  DU_LOG("\nERROR  -->  E2AP : Received Invalid Ie [%ld]", connectionUpdateAck->protocolIEs.list.array[ieIdx]->id);
+                  break;
+               }
+         }
+      }
+   }
+}
+
+/******************************************************************
+ *
+ * @brief Processes the Ric Subs delete failure msg
+ *
+ * @details
+ *
+ *    Function : procRicSubsDeleteFailure
+ *
+ *    Functionality: Processes the Ric Subs delete failure msg
+ *
+ * @params[in]
+ *       Ric Subs delete failure information
+ *
+ * @return void
+ *
+ * ****************************************************************/
+void ProcRicSubsDeleteFailure(RICsubscriptionDeleteFailure_t *ricSubsDeleteFail)
+{
+   uint8_t ieIdx = 0;
+   uint16_t ranFuncId=0;
+   CauseE2_t *cause = NULLP;
+   RICrequestID_t  ricRequestID;
+
+   if(!ricSubsDeleteFail)
+   {
+      DU_LOG("\nERROR  -->  E2AP : ricSubsDeleteFail pointer is null");
+      return;
+   }
+
+   if(!ricSubsDeleteFail->protocolIEs.list.array)
+   {
+      DU_LOG("\nERROR  -->  E2AP : ricSubsDeleteFail array pointer is null");
+      return;
+   }
+
+   for(ieIdx=0; ieIdx < ricSubsDeleteFail->protocolIEs.list.count; ieIdx++)
+   {
+      if(ricSubsDeleteFail->protocolIEs.list.array[ieIdx])
+      {
+         switch(ricSubsDeleteFail->protocolIEs.list.array[ieIdx]->id)
+         {
+            case ProtocolIE_IDE2_id_RICrequestID:
+               {
+                  memcpy(&ricSubsDeleteFail->protocolIEs.list.array[ieIdx]->value.choice.RICrequestID, &ricRequestID, sizeof(RICrequestID_t));
+                  DU_LOG("\nERROR  -->  E2AP : Received RicReqId %ld and InstanceId %ld", ricRequestID.ricRequestorID, ricRequestID.ricInstanceID);
+                  break;
+               }
+            case ProtocolIE_IDE2_id_RANfunctionID:
+               {
+                  ranFuncId = ricSubsDeleteFail->protocolIEs.list.array[ieIdx]->value.choice.RANfunctionID;
+                  DU_LOG("\nERROR  -->  E2AP : Received ranfuncId %d", ranFuncId);
+                  break;
+               }
+            case ProtocolIE_IDE2_id_CauseE2:
+               {
+                   cause = &ricSubsDeleteFail->protocolIEs.list.array[ieIdx]->value.choice.CauseE2;
+                   printE2ErrorCause(cause);
+                   break;
+               }
+            default:
+               {
+                  DU_LOG("\nERROR  -->  E2AP : Received Invalid Ie [%ld]", ricSubsDeleteFail->protocolIEs.list.array[ieIdx]->id);
+                  break;
+               }
+         }
+      }
+   }
+}
+
+
+/******************************************************************
+ *
+ * @brief Processes the Ric Subs delete rsp msg
+ *
+ * @details
+ *
+ *    Function : ProcRicSubsDeleteRsp
+ *
+ *    Functionality: Processes the Ric Subs delete rsp msg
+ *
+ * @params[in]
+ *       Ric Subs delete rsp information
+ *
+ * @return void
+ *
+ * ****************************************************************/
+void ProcRicSubsDeleteRsp(uint32_t duId, RICsubscriptionDeleteResponse_t *ricSubsDeleteRsp)
+{
+   uint8_t ieIdx = 0;
+   uint8_t duIdx= 0;
+   uint16_t ranFuncId=0;
+   RanFunction *ranFuncDb = NULLP;
+   RicRequestId ricReqId;
+   DuDb    *duDb = NULLP;
+   RicSubscription *ricSubs = NULLP;
+   CmLList *ricSubsNode = NULLP;
+
+   SEARCH_DU_DB(duIdx, duId, duDb);
+   if(duDb == NULLP)
+   {
+      DU_LOG("\nERROR  -->  E2AP : duDb is not present for duId %d",duId);
+      return;
+   }
+
+   if(!ricSubsDeleteRsp)
+   {
+      DU_LOG("\nERROR  -->  E2AP : ricSubsDeleteRsp pointer is null");
+      return;
+   }
+
+   if(!ricSubsDeleteRsp->protocolIEs.list.array)
+   {
+      DU_LOG("\nERROR  -->  E2AP : ricSubsDeleteRsp array pointer is null");
+      return;
+   }
+   for(ieIdx=0; ieIdx < ricSubsDeleteRsp->protocolIEs.list.count; ieIdx++)
+   {
+      if(ricSubsDeleteRsp->protocolIEs.list.array[ieIdx])
+      {
+         switch(ricSubsDeleteRsp->protocolIEs.list.array[ieIdx]->id)
+         {
+            case ProtocolIE_IDE2_id_RICrequestID:
+               {
+                  ricReqId.requestorId = ricSubsDeleteRsp->protocolIEs.list.array[ieIdx]->value.choice.RICrequestID.ricRequestorID;
+                  ricReqId.instanceId = ricSubsDeleteRsp->protocolIEs.list.array[ieIdx]->value.choice.RICrequestID.ricInstanceID;
+                  break;
+               }
+            case ProtocolIE_IDE2_id_RANfunctionID:
+               {
+                  ranFuncId = ricSubsDeleteRsp->protocolIEs.list.array[ieIdx]->value.choice.RANfunctionID;
+                  ranFuncDb = fetchRanFuncFromRanFuncId(duDb, ranFuncId);
+                  if(!ranFuncDb)
+                  {
+                     DU_LOG("\nERROR  -->  E2AP : Invalid Ran Function id %d received",ranFuncId);
+                     return;
+                  }
+
+                  ricSubs = fetchSubsInfoFromRicReqId(ricReqId, ranFuncDb, &ricSubsNode);
+                  if(ricSubs)
+                  {
+                     deleteRicSubscriptionNode(ricSubsNode);
+                     DU_LOG("\nINFO  -->  E2AP : Ric subscription node deleted successfully");
+                  }
+                  else
+                  {
+                     DU_LOG("\nERROR  -->  E2AP : Ric subscription node is not present ");
+                     return;
+                  }
+                  break;
+               }
+         }
+      }
+   }
+}
+
+/*******************************************************************
+*
+* @brief Handles received E2AP message and sends back response  
+*
+* @details
+*
+*    Function : E2APMsgHdlr
+*
+*    Functionality:
+*         - Decodes received E2AP control message
+*         - Prepares response message, encodes and sends to SCTP
+*
+* @params[in] 
+* @return ROK     - success
+*         RFAILED - failure
+*
+* ****************************************************************/
+void E2APMsgHdlr(uint32_t *duId, Buffer *mBuf)
+{
+   int             i;
+   char            *recvBuf;
+   MsgLen          copyCnt;
+   MsgLen          recvBufLen;
+   E2AP_PDU_t      *e2apMsg;
+   asn_dec_rval_t  rval; /* Decoder return value */
+   E2AP_PDU_t      e2apasnmsg ;
+   DU_LOG("\nINFO  -->  E2AP : Received E2AP message buffer");
+   ODU_PRINT_MSG(mBuf, 0,0);
+   /* Copy mBuf into char array to decode it */
+   ODU_GET_MSG_LEN(mBuf, &recvBufLen);
+   RIC_ALLOC(recvBuf, (Size)recvBufLen);
+
+   if(recvBuf == NULLP)
+   {
+      DU_LOG("\nERROR  -->  E2AP : Memory allocation failed");
+      return;
+   }
+   if(ODU_COPY_MSG_TO_FIX_BUF(mBuf, 0, recvBufLen, (Data *)recvBuf, &copyCnt) != ROK)
+   {
+      DU_LOG("\nERROR  -->  E2AP : Failed while copying %d", copyCnt);
+      return;
+   }
+
+   DU_LOG("\nDEBUG  -->  E2AP : Received flat buffer to be decoded : ");
+   for(i=0; i< recvBufLen; i++)
+   {
+        DU_LOG("%x",recvBuf[i]);
+   }
+
+   /* Decoding flat buffer into E2AP messsage */
+   e2apMsg = &e2apasnmsg;
+   memset(e2apMsg, 0, sizeof(E2AP_PDU_t));
+
+   rval = aper_decode(0, &asn_DEF_E2AP_PDU, (void **)&e2apMsg, recvBuf, recvBufLen, 0, 0);
+   RIC_FREE(recvBuf, (Size)recvBufLen);
+
+   if(rval.code == RC_FAIL || rval.code == RC_WMORE)
+   {
+      DU_LOG("\nERROR  -->  E2AP : ASN decode failed");
+      return;
+   }
+   DU_LOG("\n");
+   xer_fprint(stdout, &asn_DEF_E2AP_PDU, e2apMsg);
+
+   switch(e2apMsg->present)
+   {
+      case E2AP_PDU_PR_initiatingMessage:
+         {
+            switch(e2apMsg->choice.initiatingMessage->value.present)
+            {
+               case InitiatingMessageE2__value_PR_E2setupRequest:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : E2 setup request received");
+                     ProcE2SetupReq(duId, &e2apMsg->choice.initiatingMessage->value.choice.E2setupRequest);
+                     break;
+                  }
+               case InitiatingMessageE2__value_PR_E2nodeConfigurationUpdate:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : E2 node config update received");
+                     ProcE2NodeConfigUpdate(*duId, &e2apMsg->choice.initiatingMessage->value.choice.E2nodeConfigurationUpdate);
+                     break;
+                  }
+               case InitiatingMessageE2__value_PR_ResetRequestE2:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : E2 Reset Request received");
+                     ProcResetRequest(*duId,  &e2apMsg->choice.initiatingMessage->value.choice.ResetRequestE2);
+                     break;
+                  }
+               case InitiatingMessageE2__value_PR_RICindication:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : RIC Indication received");
+                     break;
+                  }
+               case InitiatingMessageE2__value_PR_RICserviceUpdate:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : RIC Service update received");
+                     ProcRicServiceUpdate(*duId,  &e2apMsg->choice.initiatingMessage->value.choice.RICserviceUpdate);
+                     break;
+                  }
+               case InitiatingMessageE2__value_PR_RICsubscriptionModificationRequired:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : RIC Subscription Modification Required");
+                     ProcRicSubsModReqd(*duId, \
+                           &e2apMsg->choice.initiatingMessage->value.choice.RICsubscriptionModificationRequired);
+                     break;
+                  }
+               case InitiatingMessageE2__value_PR_RICsubscriptionDeleteRequired:
+                  {
+                      DU_LOG("\nINFO  -->  E2AP : RIC Subscription Delete Required");
+                      ProcRicSubsDeleteReqd(*duId, \
+                         &e2apMsg->choice.initiatingMessage->value.choice.RICsubscriptionDeleteRequired);
+                      break;
+                  }
+
+               case InitiatingMessageE2__value_PR_ErrorIndicationE2:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : Error indication received");
+                     break;
+                  }
+               case InitiatingMessageE2__value_PR_E2RemovalRequest:
+                  {
+                     DU_LOG("\nINFO  -->  E2AP : E2 Removal request received");
+                     procE2RemovalRequest(*duId,\
+                     &e2apMsg->choice.initiatingMessage->value.choice.E2RemovalRequest);
+                     break;
+                  }
+               default:
+                  {
+                     DU_LOG("\nERROR  -->  E2AP : Invalid type of intiating message [%d]", \
+                        e2apMsg->choice.initiatingMessage->value.present);
+                     return;
+                  }
+            }/* End of switch(initiatingMessage) */
             break;
          }
       case E2AP_PDU_PR_successfulOutcome: 
@@ -6619,6 +7378,16 @@ void E2APMsgHdlr(uint32_t *duId, Buffer *mBuf)
                      ProcE2RemovalResponse(*duId, &e2apMsg->choice.successfulOutcome->value.choice.E2RemovalResponse);
                      break;
                   }
+               case SuccessfulOutcomeE2__value_PR_E2connectionUpdateAcknowledge:
+                  {
+                     ProcE2ConnectionUpdateAck(*duId, &e2apMsg->choice.successfulOutcome->value.choice.E2connectionUpdateAcknowledge);
+                     break;
+                  }
+               case SuccessfulOutcomeE2__value_PR_RICsubscriptionDeleteResponse:
+                  {
+                     ProcRicSubsDeleteRsp(*duId, &e2apMsg->choice.successfulOutcome->value.choice.RICsubscriptionDeleteResponse);
+                     break;
+                  }
                default:
                   {
                      DU_LOG("\nERROR  -->  E2AP : Invalid type of successfulOutcome message [%d]", \
@@ -6644,6 +7413,16 @@ void E2APMsgHdlr(uint32_t *duId, Buffer *mBuf)
                      ProcE2RemovalFailure(&e2apMsg->choice.unsuccessfulOutcome->value.choice.E2RemovalFailure);
                      break;
                   }
+               case UnsuccessfulOutcomeE2__value_PR_E2connectionUpdateFailure:
+                  {
+                     ProcE2connectionUpdateFailure(&e2apMsg->choice.unsuccessfulOutcome->value.choice.E2connectionUpdateFailure);
+                     break;
+                  }
+               case UnsuccessfulOutcomeE2__value_PR_RICsubscriptionDeleteFailure:
+                  {
+                     ProcRicSubsDeleteFailure(&e2apMsg->choice.unsuccessfulOutcome->value.choice.RICsubscriptionDeleteFailure);
+                     break;
+                  }
                default:
                   {
                      DU_LOG("\nERROR  -->  E2AP : Invalid type of unsuccessfulOutcome message [%d]", \