Support E2 Setup message...<Natalia>

[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
new file mode 100644 (file)
index 0000000..1c5abe7
--- /dev/null
+++ b/E2Manager/handlers/rmrmsghandlers/e2_setup_request_notification_handler.go
@@ -0,0 +1,147 @@
+package rmrmsghandlers
+
+import (
+       "bytes"
+       "e2mgr/logger"
+       "e2mgr/managers"
+       "e2mgr/models"
+       "e2mgr/rmrCgo"
+       "e2mgr/services"
+       "e2mgr/services/rmrsender"
+       "e2mgr/utils"
+       "encoding/xml"
+       "errors"
+       "fmt"
+       "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
+       "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
+)
+
+type E2SetupRequestNotificationHandler struct {
+       logger                 *logger.Logger
+       e2tInstancesManager    managers.IE2TInstancesManager
+       rmrSender              *rmrsender.RmrSender
+       rNibDataService       services.RNibDataService
+       e2tAssociationManager *managers.E2TAssociationManager
+}
+
+func NewE2SetupRequestNotificationHandler(logger *logger.Logger, e2tInstancesManager managers.IE2TInstancesManager, rmrSender *rmrsender.RmrSender, rNibDataService services.RNibDataService, e2tAssociationManager *managers.E2TAssociationManager) E2SetupRequestNotificationHandler {
+       return E2SetupRequestNotificationHandler{
+               logger:                 logger,
+               e2tInstancesManager:    e2tInstancesManager,
+               rmrSender: rmrSender,
+               rNibDataService: rNibDataService,
+               e2tAssociationManager: e2tAssociationManager,
+       }
+}
+
+func (h E2SetupRequestNotificationHandler) Handle(request *models.NotificationRequest){
+       ranName := request.RanName
+       h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - received E2 Setup Request. Payload: %x", ranName, request.Payload)
+
+       setupRequest, e2tIpAddress, err := h.parseSetupRequest(request.Payload)
+       if err != nil {
+               h.logger.Errorf(err.Error())
+               return
+       }
+
+       h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - E2T Address: %s - handling E2_SETUP_REQUEST", e2tIpAddress)
+
+       _, err = h.e2tInstancesManager.GetE2TInstance(e2tIpAddress)
+
+       if err != nil {
+               h.logger.Errorf("#E2TermInitNotificationHandler.Handle - Failed retrieving E2TInstance. error: %s", err)
+               return
+       }
+
+       nodebInfo, err := h.rNibDataService.GetNodeb(ranName)
+       if err != nil{
+               if _, ok := err.(*common.ResourceNotFoundError); ok{
+                       nbIdentity := h.buildNbIdentity(ranName, setupRequest)
+                       nodebInfo = h.buildNodebInfo(ranName, e2tIpAddress, setupRequest)
+                       err = h.rNibDataService.SaveNodeb(nbIdentity, nodebInfo)
+                       if err != nil{
+                               h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - failed to save nodebInfo entity. Error: %s", ranName, err)
+                               return
+                       }
+               } else{
+                       h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - failed to retrieve nodebInfo entity. Error: %s", ranName, err)
+                       return
+               }
+
+       } else {
+               if nodebInfo.ConnectionStatus == entities.ConnectionStatus_SHUTTING_DOWN {
+                       h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s, connection status: %s - nodeB entity in incorrect state", nodebInfo.RanName, nodebInfo.ConnectionStatus)
+                       h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - Summary: elapsed time for receiving and handling setup request message from E2 terminator: %f ms", utils.ElapsedTime(request.StartTime))
+                       return
+               }
+               h.updateNodeBFunctions(nodebInfo, setupRequest)
+       }
+       err = h.e2tAssociationManager.AssociateRan(e2tIpAddress, nodebInfo)
+       if err != nil{
+               h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - failed to associate E2T to nodeB entity. Error: %s", ranName, err)
+               return
+       }
+       successResponse := &models.E2SetupSuccessResponseMessage{}
+       successResponse.SetPlmnId(setupRequest.GetPlmnId())
+       successResponse.SetNbId("&" + fmt.Sprintf("%020b", 0xf0))
+       responsePayload, err := xml.Marshal(successResponse)
+       if err != nil{
+               h.logger.Warnf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - Error marshalling E2 Setup Response. Response: %x", ranName, responsePayload)
+       }
+       msg := models.NewRmrMessage(rmrCgo.RIC_E2_SETUP_RESP, ranName, responsePayload, request.TransactionId)
+       h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - E2 Setup Request has been built. Message: %x", ranName, msg)
+       //TODO err = h.rmrSender.Send(msg)
+
+}
+
+func (h E2SetupRequestNotificationHandler) parseSetupRequest(payload []byte)(*models.E2SetupRequestMessage, string, error){
+
+       colonInd := bytes.IndexByte(payload, ':')
+       if colonInd < 0 {
+               return nil, "", errors.New("#E2SetupRequestNotificationHandler.parseSetupRequest - Error parsing E2 Setup Request, failed extract E2T IP Address: no ':' separator found")
+       }
+
+       e2tIpAddress := string(payload[:colonInd])
+       if len(e2tIpAddress) == 0 {
+               return nil, "", errors.New("#E2SetupRequestNotificationHandler.parseSetupRequest - Empty E2T Address received")
+       }
+
+       pipInd := bytes.IndexByte(payload, '|')
+       if pipInd < 0 {
+               return nil, "", errors.New( "#E2SetupRequestNotificationHandler.parseSetupRequest - Error parsing E2 Setup Request failed extract Payload: no | separator found")
+       }
+
+       setupRequest := &models.E2SetupRequestMessage{}
+       err := xml.Unmarshal(payload[pipInd + 1:], &setupRequest)
+       if err != nil {
+               return nil, "", errors.New("#E2SetupRequestNotificationHandler.parseSetupRequest - Error unmarshalling E2 Setup Request payload: %s")
+       }
+
+       return setupRequest, e2tIpAddress, nil
+}
+
+func (h E2SetupRequestNotificationHandler) updateNodeBFunctions(nodeB *entities.NodebInfo, request *models.E2SetupRequestMessage){
+       //TODO the function should be implemented in the scope of the US 192 "Save the entire Setup request in RNIB"
+}
+
+func (h E2SetupRequestNotificationHandler) buildNodebInfo(ranName string, e2tAddress string, request *models.E2SetupRequestMessage) *entities.NodebInfo{
+       nodebInfo := &entities.NodebInfo{
+               AssociatedE2TInstanceAddress: e2tAddress,
+               ConnectionStatus: entities.ConnectionStatus_CONNECTED,
+               RanName: ranName,
+               NodeType: entities.Node_GNB,
+               Configuration: &entities.NodebInfo_Gnb{Gnb: &entities.Gnb{}},
+       }
+       h.updateNodeBFunctions(nodebInfo, request)
+       return nodebInfo
+}
+
+func (h E2SetupRequestNotificationHandler) buildNbIdentity(ranName string, setupRequest *models.E2SetupRequestMessage)*entities.NbIdentity{
+       return &entities.NbIdentity{
+               InventoryName:ranName,
+               GlobalNbId: &entities.GlobalNbId{
+                       PlmnId: setupRequest.GetPlmnId(),
+                       NbId:   setupRequest.GetNbId(),
+               },
+       }
+}
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