RIC-11565:Add support for Multiple E2 Nodes: CU/DU for the case having same GNBId

[ric-plt/e2mgr.git] / E2Manager / handlers / rmrmsghandlers / e2_setup_request_notification_handler.go

diff --git a/E2Manager/handlers/rmrmsghandlers/e2_setup_request_notification_handler.go b/E2Manager/handlers/rmrmsghandlers/e2_setup_request_notification_handler.go
index 8f4aacd..9dde134 100644 (file)
--- a/E2Manager/handlers/rmrmsghandlers/e2_setup_request_notification_handler.go
+++ b/E2Manager/handlers/rmrmsghandlers/e2_setup_request_notification_handler.go
@@ -2,6 +2,7 @@
 // Copyright 2019 AT&T Intellectual Property
 // Copyright 2019 Nokia
 // Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved.
+// Copyright 2023 Capgemini
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -36,13 +37,17 @@ import (
        "fmt"
        "strconv"
        "strings"
+       "time"
 
        "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
        "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
 )
 
+const cleanUpDurationNanoSec uint64 = 10000000000 // cleanUpDuration = 10sec (value in nanoSecond=10000000000)
+
 var (
        emptyTagsToReplaceToSelfClosingTags = []string{"reject", "ignore", "transport-resource-unavailable", "om-intervention", "request-id-unknown",
+               "unspecified", "message-not-compatible-with-receiver-state", "control-processing-overload",
                "v60s", "v20s", "v10s", "v5s", "v2s", "v1s", "ng", "xn", "e1", "f1", "w1", "s1", "x2", "success", "failure"}
        gnbTypesMap = map[string]entities.GnbType{
                "gnb":    entities.GnbType_GNB,
@@ -142,6 +147,7 @@ func (h *E2SetupRequestNotificationHandler) Handle(request *models.NotificationR
                functionsModified, err = h.handleExistingRan(ranName, nodebInfo, setupRequest)
 
                if err != nil {
+                       h.fillCauseAndSendUnsuccessfulResponse(nodebInfo, request, setupRequest)
                        return
                }
        }
@@ -214,7 +220,15 @@ func (h *E2SetupRequestNotificationHandler) handleNewRan(ranName string, e2tIpAd
 }
 
 func (h *E2SetupRequestNotificationHandler) handleExistingRan(ranName string, nodebInfo *entities.NodebInfo, setupRequest *models.E2SetupRequestMessage) (bool, error) {
-       if nodebInfo.GetConnectionStatus() == entities.ConnectionStatus_SHUTTING_DOWN {
+       if nodebInfo.GetConnectionStatus() == entities.ConnectionStatus_DISCONNECTED {
+               delta_in_nano := uint64(time.Now().UnixNano()) - nodebInfo.StatusUpdateTimeStamp
+               //The duration from last Disconnection for which a new request is to be rejected (currently 10 sec)
+               if delta_in_nano < cleanUpDurationNanoSec {
+                       h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s, connection status: %s - nodeB entity disconnection in progress", ranName, nodebInfo.ConnectionStatus)
+                       return false, errors.New("nodeB entity disconnection in progress")
+               }
+               h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - RAN name: %s, connection status: %s - nodeB entity in disconnected state", ranName, nodebInfo.ConnectionStatus)
+       } else if nodebInfo.GetConnectionStatus() == entities.ConnectionStatus_SHUTTING_DOWN {
                h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s, connection status: %s - nodeB entity in incorrect state", ranName, nodebInfo.ConnectionStatus)
                return false, errors.New("nodeB entity in incorrect state")
        }
@@ -372,6 +386,18 @@ func (h *E2SetupRequestNotificationHandler) buildNodebInfo(ranName string, e2tAd
        }
        nodebInfo.GetGnb().NodeConfigs = e2NodeConfig
 
+       if nodebInfo.NodeType == entities.Node_GNB {
+               h.logger.Debugf("#E2SetupRequestNotificationHandler buildNodebInfo - entities.Node_GNB %d", entities.Node_GNB)
+
+               gnbNodetype := h.setGnbNodeType(request)
+               h.logger.Debugf("#E2SetupRequestNotificationHandler buildNodebInfo -gnbNodetype %s", gnbNodetype)
+               nodebInfo.GnbNodeType = gnbNodetype
+               nodebInfo.CuUpId = request.GetCuupId()
+               nodebInfo.DuId = request.GetDuId()
+               h.logger.Debugf("#E2SetupRequestNotificationHandler buildNodebInfo -cuupid%s", request.GetCuupId())
+               h.logger.Debugf("#E2SetupRequestNotificationHandler buildNodebInfo -duid %s", request.GetDuId())
+       }
+
        ranFuncs := request.ExtractRanFunctionsList()
 
        if ranFuncs != nil {
@@ -381,6 +407,24 @@ func (h *E2SetupRequestNotificationHandler) buildNodebInfo(ranName string, e2tAd
        return nodebInfo, nil
 }
 
+
+func (h *E2SetupRequestNotificationHandler) setGnbNodeType(setupRequest *models.E2SetupRequestMessage) string {
+       gnbNodetype := "gNB"
+          /*Note: Deployment where CU-UP and DU are combined
+         (but do not include the CP-CP) and have a single E2 connection
+          is not supported. The combination of CU-CP, CU-UP, and DU will be
+          treated as a single gNB and expect it to have only the
+          global gNB ID in its E2 Setup ID*/
+       if setupRequest.GetCuupId() != "" && setupRequest.GetDuId() != "" {
+               gnbNodetype = "gNB"
+       } else if setupRequest.GetCuupId() != "" {
+               gnbNodetype = "gNB_CU_UP"
+       } else if setupRequest.GetDuId() != "" {
+               gnbNodetype = "gNB_DU"
+       }
+       return gnbNodetype
+}
+
 func (h *E2SetupRequestNotificationHandler) setNodeTypeAndConfiguration(nodebInfo *entities.NodebInfo) error {
        for k, v := range gnbTypesMap {
                if strings.HasPrefix(nodebInfo.RanName, k) {
@@ -413,3 +457,10 @@ func (h *E2SetupRequestNotificationHandler) buildNbIdentity(ranName string, setu
                GlobalNbId:    h.buildGlobalNbId(setupRequest),
        }
 }
+
+func (h *E2SetupRequestNotificationHandler) fillCauseAndSendUnsuccessfulResponse(nodebInfo *entities.NodebInfo, request *models.NotificationRequest, setupRequest *models.E2SetupRequestMessage) {
+       if nodebInfo.GetConnectionStatus() == entities.ConnectionStatus_DISCONNECTED {
+               cause := models.Cause{Misc: &models.CauseMisc{ControlProcessingOverload: &struct{}{}}}
+               h.handleUnsuccessfulResponse(nodebInfo.RanName, request, cause, setupRequest)
+       }
+}