/
e2_setup_request_notification_handler.go
476 lines (383 loc) · 19.1 KB
/
e2_setup_request_notification_handler.go
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//
// 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.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// This source code is part of the near-RT RIC (RAN Intelligent Controller)
// platform project (RICP).
package rmrmsghandlers
import (
"bytes"
"e2mgr/configuration"
"e2mgr/e2managererrors"
"e2mgr/logger"
"e2mgr/managers"
"e2mgr/models"
"e2mgr/rmrCgo"
"e2mgr/services"
"e2mgr/services/rmrsender"
"e2mgr/utils"
"encoding/xml"
"errors"
"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,
"en_gnb": entities.GnbType_EN_GNB,
}
enbTypesMap = map[string]entities.EnbType{
"enB_macro": entities.EnbType_MACRO_ENB,
"enB_home": entities.EnbType_HOME_ENB,
"enB_shortmacro": entities.EnbType_SHORT_MACRO_ENB,
"enB_longmacro": entities.EnbType_LONG_MACRO_ENB,
"ng_enB_macro": entities.EnbType_MACRO_NG_ENB,
"ng_enB_shortmacro": entities.EnbType_SHORT_MACRO_NG_ENB,
"ng_enB_longmacro": entities.EnbType_LONG_MACRO_NG_ENB,
}
)
type E2SetupRequestNotificationHandler struct {
logger *logger.Logger
config *configuration.Configuration
e2tInstancesManager managers.IE2TInstancesManager
rmrSender *rmrsender.RmrSender
rNibDataService services.RNibDataService
e2tAssociationManager *managers.E2TAssociationManager
ranConnectStatusChangeManager managers.IRanConnectStatusChangeManager
ranListManager managers.RanListManager
}
func NewE2SetupRequestNotificationHandler(logger *logger.Logger, config *configuration.Configuration, e2tInstancesManager managers.IE2TInstancesManager, rmrSender *rmrsender.RmrSender, rNibDataService services.RNibDataService, e2tAssociationManager *managers.E2TAssociationManager, ranConnectStatusChangeManager managers.IRanConnectStatusChangeManager, ranListManager managers.RanListManager) *E2SetupRequestNotificationHandler {
return &E2SetupRequestNotificationHandler{
logger: logger,
config: config,
e2tInstancesManager: e2tInstancesManager,
rmrSender: rmrSender,
rNibDataService: rNibDataService,
e2tAssociationManager: e2tAssociationManager,
ranConnectStatusChangeManager: ranConnectStatusChangeManager,
ranListManager: ranListManager,
}
}
func (h *E2SetupRequestNotificationHandler) Handle(request *models.NotificationRequest) {
ranName := request.RanName
models.UpdateProcedureType(ranName, models.E2SetupProcedureNotInitiated)
h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - received E2_SETUP_REQUEST. Payload: %x", ranName, request.Payload)
generalConfiguration, err := h.rNibDataService.GetGeneralConfiguration()
if err != nil {
h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - Failed retrieving e2m general configuration - quitting e2 setup flow. error: %s", err)
return
}
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)
h.logger.Debugf("#E2SetupRequestNotificationHandler.Handle - E2_SETUP_REQUEST has been parsed successfully %+v", setupRequest)
h.logger.Infof("#E2SetupRequestNotificationHandler.Handle - got general configuration from rnib - enableRic: %t", generalConfiguration.EnableRic)
if !generalConfiguration.EnableRic {
cause := models.Cause{Misc: &models.CauseMisc{OmIntervention: &struct{}{}}}
h.handleUnsuccessfulResponse(ranName, request, cause, setupRequest)
models.UpdateProcedureType(ranName, models.E2SetupProcedureFailure)
return
}
_, 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)
var functionsModified bool
if err != nil {
if _, ok := err.(*common.ResourceNotFoundError); !ok {
h.logger.Errorf("#E2SetupRequestNotificationHandler.Handle - RAN name: %s - failed to retrieve nodebInfo entity. Error: %s", ranName, err)
return
}
if nodebInfo, err = h.handleNewRan(ranName, e2tIpAddress, setupRequest); err != nil {
if _, ok := err.(*e2managererrors.UnknownSetupRequestRanNameError); ok {
cause := models.Cause{RicRequest: &models.CauseRic{RequestIdUnknown: &struct{}{}}}
h.handleUnsuccessfulResponse(ranName, request, cause, setupRequest)
models.UpdateProcedureType(ranName, models.E2SetupProcedureFailure)
}
return
}
} else {
functionsModified, err = h.handleExistingRan(ranName, nodebInfo, setupRequest)
if err != nil {
h.fillCauseAndSendUnsuccessfulResponse(nodebInfo, request, setupRequest)
models.UpdateProcedureType(ranName, models.E2SetupProcedureFailure)
return
}
}
models.UpdateProcedureType(ranName, models.E2SetupProcedureOngoing)
ranStatusChangePublished, 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)
if _, ok := err.(*e2managererrors.RoutingManagerError); ok {
if err = h.handleUpdateAndPublishNodebInfo(functionsModified, ranStatusChangePublished, nodebInfo); err != nil {
return
}
cause := models.Cause{Transport: &models.CauseTransport{TransportResourceUnavailable: &struct{}{}}}
h.handleUnsuccessfulResponse(nodebInfo.RanName, request, cause, setupRequest)
models.UpdateProcedureType(ranName, models.E2SetupProcedureFailure)
}
return
}
if err = h.handleUpdateAndPublishNodebInfo(functionsModified, ranStatusChangePublished, nodebInfo); err != nil {
return
}
h.handleSuccessfulResponse(ranName, request, setupRequest)
models.UpdateProcedureType(ranName, models.E2SetupProcedureCompleted)
h.logger.Debugf("#E2SetupRequestNotificationHandler.Handle - updating the enum value to e2setup request completed")
}
func (h *E2SetupRequestNotificationHandler) handleUpdateAndPublishNodebInfo(functionsModified bool, ranStatusChangePublished bool, nodebInfo *entities.NodebInfo) error {
if ranStatusChangePublished || !functionsModified {
return nil
}
err := h.rNibDataService.UpdateNodebInfoAndPublish(nodebInfo)
if err != nil {
h.logger.Errorf("#E2SetupRequestNotificationHandler.handleUpdateAndPublishNodebInfo - RAN name: %s - Failed at UpdateNodebInfoAndPublish. error: %s", nodebInfo.RanName, err)
return err
}
h.logger.Infof("#E2SetupRequestNotificationHandler.handleUpdateAndPublishNodebInfo - RAN name: %s - Successfully executed UpdateNodebInfoAndPublish", nodebInfo.RanName)
return nil
}
func (h *E2SetupRequestNotificationHandler) handleNewRan(ranName string, e2tIpAddress string, setupRequest *models.E2SetupRequestMessage) (*entities.NodebInfo, error) {
nodebInfo, err := h.buildNodebInfo(ranName, e2tIpAddress, setupRequest)
if err != nil {
h.logger.Errorf("#E2SetupRequestNotificationHandler.handleNewRan - RAN name: %s - failed building nodebInfo. Error: %s", ranName, err)
return nil, err
}
err = h.rNibDataService.SaveNodeb(nodebInfo)
if err != nil {
h.logger.Errorf("#E2SetupRequestNotificationHandler.handleNewRan - RAN name: %s - failed saving nodebInfo. Error: %s", ranName, err)
return nil, err
}
nbIdentity := h.buildNbIdentity(ranName, setupRequest)
err = h.ranListManager.AddNbIdentity(nodebInfo.GetNodeType(), nbIdentity)
if err != nil {
return nil, err
}
return nodebInfo, nil
}
func (h *E2SetupRequestNotificationHandler) handleExistingRan(ranName string, nodebInfo *entities.NodebInfo, setupRequest *models.E2SetupRequestMessage) (bool, error) {
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")
}
nodebInfo.SetupFromNetwork = true
e2NodeConfig := setupRequest.ExtractE2NodeConfigList()
if e2NodeConfig == nil {
return false, errors.New("Empty E2nodeComponentConfigAddition-List")
}
if nodebInfo.NodeType == entities.Node_ENB {
if len(e2NodeConfig) == 0 && len(nodebInfo.GetEnb().GetNodeConfigs()) == 0 {
return false, errors.New("Empty E2nodeComponentConfigAddition-List")
}
nodebInfo.GetEnb().NodeConfigs = e2NodeConfig
return false, nil
}
if len(e2NodeConfig) == 0 && len(nodebInfo.GetGnb().GetNodeConfigs()) == 0 {
return false, errors.New("Empty E2nodeComponentConfigAddition-List")
}
nodebInfo.GetGnb().NodeConfigs = e2NodeConfig
setupMessageRanFuncs := setupRequest.ExtractRanFunctionsList()
if setupMessageRanFuncs == nil || (len(setupMessageRanFuncs) == 0 && len(nodebInfo.GetGnb().RanFunctions) == 0) {
return false, nil
}
nodebInfo.GetGnb().RanFunctions = setupMessageRanFuncs
return true, nil
}
func (h *E2SetupRequestNotificationHandler) handleUnsuccessfulResponse(ranName string, req *models.NotificationRequest, cause models.Cause, setupRequest *models.E2SetupRequestMessage) {
failureResponse := models.NewE2SetupFailureResponseMessage(models.TimeToWaitEnum.V60s, cause, setupRequest)
h.logger.Debugf("#E2SetupRequestNotificationHandler.handleUnsuccessfulResponse - E2_SETUP_RESPONSE has been built successfully %+v", failureResponse)
responsePayload, err := xml.Marshal(&failureResponse.E2APPDU)
if err != nil {
h.logger.Warnf("#E2SetupRequestNotificationHandler.handleUnsuccessfulResponse - RAN name: %s - Error marshalling RIC_E2_SETUP_RESP. Payload: %s", ranName, responsePayload)
}
responsePayload = utils.ReplaceEmptyTagsWithSelfClosing(responsePayload, emptyTagsToReplaceToSelfClosingTags)
h.logger.Infof("#E2SetupRequestNotificationHandler.handleUnsuccessfulResponse - payload: %s", responsePayload)
msg := models.NewRmrMessage(rmrCgo.RIC_E2_SETUP_FAILURE, ranName, responsePayload, req.TransactionId, req.GetMsgSrc())
h.logger.Infof("#E2SetupRequestNotificationHandler.handleUnsuccessfulResponse - RAN name: %s - RIC_E2_SETUP_RESP message has been built successfully. Message: %x", ranName, msg)
_ = h.rmrSender.WhSend(msg)
}
func (h *E2SetupRequestNotificationHandler) handleSuccessfulResponse(ranName string, req *models.NotificationRequest, setupRequest *models.E2SetupRequestMessage) {
plmnId := buildPlmnId(h.config.GlobalRicId.Mcc, h.config.GlobalRicId.Mnc)
ricNearRtId, err := convertTo20BitString(h.config.GlobalRicId.RicId)
if err != nil {
return
}
successResponse := models.NewE2SetupSuccessResponseMessage(plmnId, ricNearRtId, setupRequest)
h.logger.Debugf("#E2SetupRequestNotificationHandler.handleSuccessfulResponse - E2_SETUP_RESPONSE has been built successfully %+v", successResponse)
responsePayload, err := xml.Marshal(&successResponse.E2APPDU)
if err != nil {
h.logger.Warnf("#E2SetupRequestNotificationHandler.handleSuccessfulResponse - RAN name: %s - Error marshalling RIC_E2_SETUP_RESP. Payload: %s", ranName, responsePayload)
}
responsePayload = utils.ReplaceEmptyTagsWithSelfClosing(responsePayload, emptyTagsToReplaceToSelfClosingTags)
h.logger.Infof("#E2SetupRequestNotificationHandler.handleSuccessfulResponse - payload: %s", responsePayload)
msg := models.NewRmrMessage(rmrCgo.RIC_E2_SETUP_RESP, ranName, responsePayload, req.TransactionId, req.GetMsgSrc())
h.logger.Infof("#E2SetupRequestNotificationHandler.handleSuccessfulResponse - RAN name: %s - RIC_E2_SETUP_RESP message has been built successfully. Message: %x", ranName, msg)
_ = h.rmrSender.Send(msg)
}
func buildPlmnId(mmc string, mnc string) string {
var b strings.Builder
b.WriteByte(mmc[1])
b.WriteByte(mmc[0])
if len(mnc) == 2 {
b.WriteString("F")
} else {
b.WriteByte(mnc[2])
}
b.WriteByte(mmc[2])
b.WriteByte(mnc[1])
b.WriteByte(mnc[0])
return b.String()
}
func convertTo20BitString(ricNearRtId string) (string, error) {
r, err := strconv.ParseUint(ricNearRtId, 16, 32)
if err != nil {
return "", err
}
return fmt.Sprintf("%020b", r)[:20], nil
}
func (h *E2SetupRequestNotificationHandler) parseSetupRequest(payload []byte) (*models.E2SetupRequestMessage, string, error) {
pipInd := bytes.IndexByte(payload, '|')
if pipInd < 0 {
return nil, "", errors.New("#E2SetupRequestNotificationHandler.parseSetupRequest - Error parsing E2 Setup Request failed extract Payload: no | separator found")
}
e2tIpAddress := string(payload[:pipInd])
if len(e2tIpAddress) == 0 {
return nil, "", errors.New("#E2SetupRequestNotificationHandler.parseSetupRequest - Empty E2T Address received")
}
h.logger.Infof("#E2SetupRequestNotificationHandler.parseSetupRequest - payload: %s", payload[pipInd+1:])
setupRequest := &models.E2SetupRequestMessage{}
err := xml.Unmarshal(utils.NormalizeXml(payload[pipInd+1:]), &setupRequest.E2APPDU)
if err != nil {
return nil, "", errors.New(fmt.Sprintf("#E2SetupRequestNotificationHandler.parseSetupRequest - Error unmarshalling E2 Setup Request payload: %x", payload))
}
return setupRequest, e2tIpAddress, nil
}
func (h *E2SetupRequestNotificationHandler) buildNodebInfo(ranName string, e2tAddress string, request *models.E2SetupRequestMessage) (*entities.NodebInfo, error) {
nodebInfo := &entities.NodebInfo{
AssociatedE2TInstanceAddress: e2tAddress,
RanName: ranName,
GlobalNbId: h.buildGlobalNbId(request),
SetupFromNetwork: true,
}
err := h.setNodeTypeAndConfiguration(nodebInfo)
if err != nil {
return nil, err
}
e2NodeConfig := request.ExtractE2NodeConfigList()
if e2NodeConfig == nil {
return nil, errors.New("Empty E2nodeComponentConfigAddition-List")
}
if nodebInfo.NodeType == entities.Node_ENB {
if len(e2NodeConfig) == 0 && len(nodebInfo.GetEnb().GetNodeConfigs()) == 0 {
return nil, errors.New("Empty E2nodeComponentConfigAddition-List")
}
nodebInfo.GetEnb().NodeConfigs = e2NodeConfig
return nodebInfo, nil
}
if len(e2NodeConfig) == 0 && len(nodebInfo.GetGnb().GetNodeConfigs()) == 0 {
return nil, errors.New("Empty E2nodeComponentConfigAddition-List")
}
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 {
nodebInfo.GetGnb().RanFunctions = ranFuncs
}
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) {
nodebInfo.NodeType = entities.Node_GNB
nodebInfo.Configuration = &entities.NodebInfo_Gnb{Gnb: &entities.Gnb{GnbType: v}}
return nil
}
}
for k, v := range enbTypesMap {
if strings.HasPrefix(nodebInfo.RanName, k) {
nodebInfo.NodeType = entities.Node_ENB
nodebInfo.Configuration = &entities.NodebInfo_Enb{Enb: &entities.Enb{EnbType: v}}
return nil
}
}
return e2managererrors.NewUnknownSetupRequestRanNameError(nodebInfo.RanName)
}
func (h *E2SetupRequestNotificationHandler) buildGlobalNbId(setupRequest *models.E2SetupRequestMessage) *entities.GlobalNbId {
return &entities.GlobalNbId{
PlmnId: setupRequest.GetPlmnId(),
NbId: setupRequest.GetNbId(),
}
}
func (h *E2SetupRequestNotificationHandler) buildNbIdentity(ranName string, setupRequest *models.E2SetupRequestMessage) *entities.NbIdentity {
return &entities.NbIdentity{
InventoryName: ranName,
GlobalNbId: h.buildGlobalNbId(setupRequest),
}
}
func (h *E2SetupRequestNotificationHandler) fillCauseAndSendUnsuccessfulResponse(nodebInfo *entities.NodebInfo, request *models.NotificationRequest, setupRequest *models.E2SetupRequestMessage) {
ranName := request.RanName
if nodebInfo.GetConnectionStatus() == entities.ConnectionStatus_DISCONNECTED {
cause := models.Cause{Misc: &models.CauseMisc{ControlProcessingOverload: &struct{}{}}}
h.handleUnsuccessfulResponse(nodebInfo.RanName, request, cause, setupRequest)
models.UpdateProcedureType(ranName, models.E2SetupProcedureFailure)
}
}