E2Manager/handlers/rmrmsghandlers/e2_setup_request_notification_handler.go

   1 package rmrmsghandlers
   2
   3 import (
   4         "bytes"
   5         "e2mgr/logger"
   6         "e2mgr/managers"
   7         "e2mgr/models"
   8         "e2mgr/rmrCgo"
   9         "e2mgr/services"
  10         "e2mgr/services/rmrsender"
  11         "e2mgr/utils"
  12         "encoding/xml"
  13         "errors"
  14         "fmt"
  15         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
  16         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  17 )
  18
  19 type E2SetupRequestNotificationHandler struct {
  20         logger                 *logger.Logger
  21         e2tInstancesManager    managers.IE2TInstancesManager
  22         rmrSender              *rmrsender.RmrSender
  23         rNibDataService       services.RNibDataService
  24         e2tAssociationManager *managers.E2TAssociationManager
  25 }
  26
  27 func NewE2SetupRequestNotificationHandler(logger *logger.Logger, e2tInstancesManager managers.IE2TInstancesManager, rmrSender *rmrsender.RmrSender, rNibDataService services.RNibDataService, e2tAssociationManager *managers.E2TAssociationManager) E2SetupRequestNotificationHandler {
  28         return E2SetupRequestNotificationHandler{
  29                 logger:                 logger,
  30                 e2tInstancesManager:    e2tInstancesManager,
  31                 rmrSender: rmrSender,
  32                 rNibDataService: rNibDataService,
  33                 e2tAssociationManager: e2tAssociationManager,
  34         }
  35 }
  36
  37 func (h E2SetupRequestNotificationHandler) Handle(request *models.NotificationRequest){
  38         ranName := request.RanName
  39         h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - received E2 Setup Request. Payload: %x", ranName, request.Payload)
  40
  41         setupRequest, e2tIpAddress, err := h.parseSetupRequest(request.Payload)
  42         if err != nil {
  43                 h.logger.Errorf(err.Error())
  44                 return
  45         }
  46
  47         h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - E2T Address: %s - handling E2_SETUP_REQUEST", e2tIpAddress)
  48
  49         _, err = h.e2tInstancesManager.GetE2TInstance(e2tIpAddress)
  50
  51         if err != nil {
  52                 h.logger.Errorf("#E2TermInitNotificationHandler.Handle - Failed retrieving E2TInstance. error: %s", err)
  53                 return
  54         }
  55
  56         nodebInfo, err := h.rNibDataService.GetNodeb(ranName)
  57         if err != nil{
  58                 if _, ok := err.(*common.ResourceNotFoundError); ok{
  59                         nbIdentity := h.buildNbIdentity(ranName, setupRequest)
  60                         nodebInfo = h.buildNodebInfo(ranName, e2tIpAddress, setupRequest)
  61                         err = h.rNibDataService.SaveNodeb(nbIdentity, nodebInfo)
  62                         if err != nil{
  63                                 h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - failed to save nodebInfo entity. Error: %s", ranName, err)
  64                                 return
  65                         }
  66                 } else{
  67                         h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - failed to retrieve nodebInfo entity. Error: %s", ranName, err)
  68                         return
  69                 }
  70
  71         } else {
  72                 if nodebInfo.ConnectionStatus == entities.ConnectionStatus_SHUTTING_DOWN {
  73                         h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s, connection status: %s - nodeB entity in incorrect state", nodebInfo.RanName, nodebInfo.ConnectionStatus)
  74                         h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - Summary: elapsed time for receiving and handling setup request message from E2 terminator: %f ms", utils.ElapsedTime(request.StartTime))
  75                         return
  76                 }
  77                 h.updateNodeBFunctions(nodebInfo, setupRequest)
  78         }
  79         err = h.e2tAssociationManager.AssociateRan(e2tIpAddress, nodebInfo)
  80         if err != nil{
  81                 h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - failed to associate E2T to nodeB entity. Error: %s", ranName, err)
  82                 return
  83         }
  84         successResponse := &models.E2SetupSuccessResponseMessage{}
  85         successResponse.SetPlmnId(setupRequest.GetPlmnId())
  86         successResponse.SetNbId("&" + fmt.Sprintf("%020b", 0xf0))
  87         responsePayload, err := xml.Marshal(successResponse)
  88         if err != nil{
  89                 h.logger.Warnf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - Error marshalling E2 Setup Response. Response: %x", ranName, responsePayload)
  90         }
  91         msg := models.NewRmrMessage(rmrCgo.RIC_E2_SETUP_RESP, ranName, responsePayload, request.TransactionId)
  92         h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - E2 Setup Request has been built. Message: %x", ranName, msg)
  93         //TODO err = h.rmrSender.Send(msg)
  94
  95 }
  96
  97 func (h E2SetupRequestNotificationHandler) parseSetupRequest(payload []byte)(*models.E2SetupRequestMessage, string, error){
  98
  99         colonInd := bytes.IndexByte(payload, ':')
 100         if colonInd < 0 {
 101                 return nil, "", errors.New("#E2SetupRequestNotificationHandler.parseSetupRequest - Error parsing E2 Setup Request, failed extract E2T IP Address: no ':' separator found")
 102         }
 103
 104         e2tIpAddress := string(payload[:colonInd])
 105         if len(e2tIpAddress) == 0 {
 106                 return nil, "", errors.New("#E2SetupRequestNotificationHandler.parseSetupRequest - Empty E2T Address received")
 107         }
 108
 109         pipInd := bytes.IndexByte(payload, '|')
 110         if pipInd < 0 {
 111                 return nil, "", errors.New( "#E2SetupRequestNotificationHandler.parseSetupRequest - Error parsing E2 Setup Request failed extract Payload: no | separator found")
 112         }
 113
 114         setupRequest := &models.E2SetupRequestMessage{}
 115         err := xml.Unmarshal(payload[pipInd + 1:], &setupRequest)
 116         if err != nil {
 117                 return nil, "", errors.New("#E2SetupRequestNotificationHandler.parseSetupRequest - Error unmarshalling E2 Setup Request payload: %s")
 118         }
 119
 120         return setupRequest, e2tIpAddress, nil
 121 }
 122
 123 func (h E2SetupRequestNotificationHandler) updateNodeBFunctions(nodeB *entities.NodebInfo, request *models.E2SetupRequestMessage){
 124         //TODO the function should be implemented in the scope of the US 192 "Save the entire Setup request in RNIB"
 125 }
 126
 127 func (h E2SetupRequestNotificationHandler) buildNodebInfo(ranName string, e2tAddress string, request *models.E2SetupRequestMessage) *entities.NodebInfo{
 128         nodebInfo := &entities.NodebInfo{
 129                 AssociatedE2TInstanceAddress: e2tAddress,
 130                 ConnectionStatus: entities.ConnectionStatus_CONNECTED,
 131                 RanName: ranName,
 132                 NodeType: entities.Node_GNB,
 133                 Configuration: &entities.NodebInfo_Gnb{Gnb: &entities.Gnb{}},
 134         }
 135         h.updateNodeBFunctions(nodebInfo, request)
 136         return nodebInfo
 137 }
 138
 139 func (h E2SetupRequestNotificationHandler) buildNbIdentity(ranName string, setupRequest *models.E2SetupRequestMessage)*entities.NbIdentity{
 140         return &entities.NbIdentity{
 141                 InventoryName:ranName,
 142                 GlobalNbId: &entities.GlobalNbId{
 143                         PlmnId: setupRequest.GetPlmnId(),
 144                         NbId:   setupRequest.GetNbId(),
 145                 },
 146         }
 147 }