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server.go
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server.go
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package server
import (
"crypto/rsa"
"crypto/tls"
_ "embed"
"fmt"
"log"
"math"
mathrand "math/rand"
"net"
"net/url"
"sync"
"sync/atomic"
"time"
"github.com/awcullen/opcua/ua"
"github.com/gammazero/workerpool"
)
const (
// documents the version of binary protocol that this library supports.
protocolVersion uint32 = 0
// the default size of the send and receive buffers.
defaultBufferSize uint32 = 64 * 1024
// the limit on the size of messages that may be accepted.
defaultMaxMessageSize uint32 = 16 * 1024 * 1024
// defaultMaxChunkCount sets the limit on the number of message chunks that may be accepted.
defaultMaxChunkCount uint32 = 4 * 1024
// the minimum number of milliseconds that a session may be unused before being closed by the server. (2 min)
minSessionTimeout float64 = 10 * 1000
// the maximum number of milliseconds that a session may be unused before being closed by the server. (60 min)
maxSessionTimeout float64 = 3600 * 1000
// the default number of sessions that may be active. (no limit)
defaultMaxSessionCount uint32 = 0
// the default number of subscriptions that may be active. (no limit)
defaultMaxSubscriptionCount uint32 = 0
// the default number of worker threads that may be created.
defaultMaxWorkerThreads int = 4
// the length of nonce in bytes.
nonceLength int = 32
)
var (
//go:embed nodeset_1_04.xml
nodeset104 []byte
)
// Server implements an OpcUa server for clients.
type Server struct {
sync.RWMutex
localDescription ua.ApplicationDescription
endpoints []ua.EndpointDescription
maxSessionCount uint32
maxSubscriptionCount uint32
serverCapabilities *ua.ServerCapabilities
buildInfo ua.BuildInfo
certPath string
keyPath string
trustedCertsPath string
trustedCRLsPath string
issuerCertsPath string
issuerCRLsPath string
rejectedCertsPath string
endpointURL string
suppressCertificateExpired bool
suppressCertificateChainIncomplete bool
suppressCertificateRevocationUnknown bool
receiveBufferSize uint32
sendBufferSize uint32
maxMessageSize uint32
maxChunkCount uint32
maxWorkerThreads int
serverDiagnostics bool
trace bool
localCertificate []byte
localPrivateKey *rsa.PrivateKey
closing chan struct{}
state ua.ServerState
secondsTillShutdown uint32
shutdownReason ua.LocalizedText
workerpool *workerpool.WorkerPool
sessionManager *SessionManager
subscriptionManager *SubscriptionManager
namespaceManager *NamespaceManager
serverUris []string
startTime time.Time
serverDiagnosticsSummary *ua.ServerDiagnosticsSummaryDataType
scheduler *Scheduler
historian HistoryReadWriter
allowSecurityPolicyNone bool
anonymousIdentityAuthenticator AnonymousIdentityAuthenticator
userNameIdentityAuthenticator UserNameIdentityAuthenticator
x509IdentityAuthenticator X509IdentityAuthenticator
issuedIdentityAuthenticator IssuedIdentityAuthenticator
rolesProvider RolesProvider
rolePermissions []ua.RolePermissionType
lastChannelID uint32
}
// New initializes a new instance of the Server.
// Specify the ApplicationDescription as defined in https://reference.opcfoundation.org/v104/Core/docs/Part4/7.1/
// The files must contain PEM encoded data.
// The endpointURL is in the form opc.tcp://[host]:[port]
func New(localDescription ua.ApplicationDescription, certPath, keyPath, endpointURL string, options ...Option) (*Server, error) {
srv := &Server{
localDescription: localDescription,
certPath: certPath,
keyPath: keyPath,
endpointURL: endpointURL,
maxSessionCount: defaultMaxSessionCount,
maxSubscriptionCount: defaultMaxSubscriptionCount,
serverCapabilities: ua.NewServerCapabilities(),
buildInfo: ua.BuildInfo{},
suppressCertificateExpired: false,
suppressCertificateChainIncomplete: false,
receiveBufferSize: defaultBufferSize,
sendBufferSize: defaultBufferSize,
maxMessageSize: defaultMaxMessageSize,
maxChunkCount: defaultMaxChunkCount,
maxWorkerThreads: defaultMaxWorkerThreads,
serverDiagnostics: true,
trace: false,
closing: make(chan struct{}),
serverUris: []string{localDescription.ApplicationURI},
state: ua.ServerStateUnknown,
startTime: time.Now(),
serverDiagnosticsSummary: &ua.ServerDiagnosticsSummaryDataType{},
rolesProvider: DefaultRolesProvider,
rolePermissions: DefaultRolePermissions,
lastChannelID: mathrand.Uint32(),
}
// apply each option to the default
for _, opt := range options {
if err := opt(srv); err != nil {
return nil, err
}
}
srv.workerpool = workerpool.New(srv.maxWorkerThreads)
srv.sessionManager = NewSessionManager(srv)
srv.subscriptionManager = NewSubscriptionManager(srv)
srv.namespaceManager = NewNamespaceManager(srv)
srv.scheduler = NewScheduler(srv)
cert, err := tls.LoadX509KeyPair(srv.certPath, srv.keyPath)
if err != nil {
log.Printf("Error loading x509 key pair. %s\n", err)
return nil, err
}
srv.localCertificate = cert.Certificate[0]
srv.localPrivateKey, _ = cert.PrivateKey.(*rsa.PrivateKey)
if err := srv.initializeNamespace(); err != nil {
log.Printf("Error initializing namespace. %s\n", err)
return nil, err
}
return srv, nil
}
// LocalDescription gets the application description.
func (srv *Server) LocalDescription() ua.ApplicationDescription {
srv.RLock()
defer srv.RUnlock()
return srv.localDescription
}
// LocalCertificate gets the certificate for the local application.
func (srv *Server) LocalCertificate() []byte {
srv.RLock()
defer srv.RUnlock()
return srv.localCertificate
}
// EndpointURL gets the endpoint url.
func (srv *Server) EndpointURL() string {
srv.RLock()
defer srv.RUnlock()
return srv.endpointURL
}
// Endpoints gets the endpoint descriptions.
func (srv *Server) Endpoints() []ua.EndpointDescription {
srv.RLock()
defer srv.RUnlock()
if srv.endpoints == nil {
srv.endpoints = srv.buildEndpointDescriptions()
}
return srv.endpoints
}
// Closing gets a channel that broadcasts the closing of the server.
func (srv *Server) Closing() <-chan struct{} {
srv.RLock()
defer srv.RUnlock()
return srv.closing
}
// State gets the ServerState.
func (srv *Server) State() ua.ServerState {
srv.RLock()
defer srv.RUnlock()
return srv.state
}
// NamespaceUris gets the namespace uris.
func (srv *Server) NamespaceUris() []string {
srv.RLock()
defer srv.RUnlock()
return srv.namespaceManager.NamespaceUris()
}
// ServerUris gets the server uris.
func (srv *Server) ServerUris() []string {
srv.RLock()
defer srv.RUnlock()
return srv.serverUris
}
// RolePermissions gets the RolePermissions.
func (srv *Server) RolePermissions() []ua.RolePermissionType {
srv.RLock()
defer srv.RUnlock()
return srv.rolePermissions
}
// WorkerPool gets a pool of workers.
func (srv *Server) WorkerPool() *workerpool.WorkerPool {
srv.RLock()
defer srv.RUnlock()
return srv.workerpool
}
// SessionManager gets the session manager.
func (srv *Server) SessionManager() *SessionManager {
srv.RLock()
defer srv.RUnlock()
return srv.sessionManager
}
// NamespaceManager gets the namespace manager.
func (srv *Server) NamespaceManager() *NamespaceManager {
srv.RLock()
defer srv.RUnlock()
return srv.namespaceManager
}
// SubscriptionManager gets the subscription Manager.
func (srv *Server) SubscriptionManager() *SubscriptionManager {
srv.RLock()
defer srv.RUnlock()
return srv.subscriptionManager
}
// Scheduler gets the polling scheduler.
func (srv *Server) Scheduler() *Scheduler {
srv.RLock()
defer srv.RUnlock()
return srv.scheduler
}
// Historian gets the HistoryReadWriter.
func (srv *Server) Historian() HistoryReadWriter {
srv.RLock()
defer srv.RUnlock()
return srv.historian
}
// MaxSessionCount gets the maximum number of sessions.
func (srv *Server) MaxSessionCount() uint32 {
srv.RLock()
defer srv.RUnlock()
return srv.maxSessionCount
}
// MaxSubscriptionCount gets the maximum number of subscriptions.
func (srv *Server) MaxSubscriptionCount() uint32 {
srv.RLock()
defer srv.RUnlock()
return srv.maxSubscriptionCount
}
// ServerCapabilities gets the capabilities of the server.
func (srv *Server) ServerCapabilities() *ua.ServerCapabilities {
srv.RLock()
defer srv.RUnlock()
return srv.serverCapabilities
}
// ListenAndServe listens on the EndpointURL for incoming connections and then
// handles service requests.
// ListenAndServe always returns a non-nil error. After server Close,
// the returned error is BadServerHalted.
func (srv *Server) ListenAndServe() error {
srv.Lock()
if srv.state != ua.ServerStateUnknown {
srv.Unlock()
return ua.BadInternalError
}
srv.state = ua.ServerStateRunning
srv.Unlock()
baseURL, err := url.Parse(srv.endpointURL)
if err != nil {
// log.Printf("Error opening secure channel listener. %s\n", err.Error())
return ua.BadTCPEndpointURLInvalid
}
ln, err := net.Listen("tcp", ":"+baseURL.Port())
if err != nil {
// log.Printf("Error opening secure channel listener. %s\n", err.Error())
return ua.BadResourceUnavailable
}
go func() {
<-srv.closing
ln.Close()
}()
var wg sync.WaitGroup
err = srv.serve(ln, &wg)
// wait until channels closed
wg.Wait()
// stop workers.
srv.workerpool.StopWait()
return err
}
// Close server.
func (srv *Server) Close() error {
srv.Lock()
if srv.state != ua.ServerStateRunning {
srv.Unlock()
return ua.BadInternalError
}
srv.state = ua.ServerStateShutdown
srv.Unlock()
// allow for existing clients to exit gracefully
srv.shutdownReason = ua.NewLocalizedText("Closing", "")
for i := 3; i > 0; i-- {
srv.secondsTillShutdown = uint32(i)
time.Sleep(time.Second)
}
srv.secondsTillShutdown = uint32(0)
// begin closing channels
close(srv.closing)
return nil
}
// GetRoles returns the roles for the given user identity and connection information.
func (srv *Server) GetRoles(userIdentity any, applicationURI string, endpointURL string) ([]ua.NodeID, error) {
return srv.rolesProvider.GetRoles(userIdentity, applicationURI, endpointURL)
}
func (srv *Server) serve(ln net.Listener, wg *sync.WaitGroup) error {
var delay time.Duration
for {
conn, err := ln.Accept()
if err != nil {
if srv.State() != ua.ServerStateRunning {
return ua.BadServerHalted
}
if ne, ok := err.(net.Error); ok && ne.Timeout() {
if delay == 0 {
delay = 5 * time.Millisecond
} else {
delay *= 2
}
if max := 1 * time.Second; delay > max {
delay = max
}
time.Sleep(delay)
continue
}
return ua.BadTCPInternalError
}
delay = 0
wg.Add(1)
go srv.handleConnection(conn, wg)
}
}
// handleConnection wraps conn in ServerSecureChannel and handles service requests.
func (srv *Server) handleConnection(conn net.Conn, wg *sync.WaitGroup) {
defer conn.Close()
defer wg.Done()
ch := newServerSecureChannel(srv, conn, srv.receiveBufferSize, srv.sendBufferSize, srv.maxMessageSize, srv.maxChunkCount, srv.trace)
err := ch.Open()
if err != nil {
// log.Printf("Error opening secure channel. %s\n", err)
if c, ok := err.(ua.StatusCode); ok {
ch.Abort(c, "")
}
return
}
// log.Printf("Success opening secure channel '%d'.\n", ch.channelID)
closing := make(chan struct{})
defer close(closing)
// setup the cancellation to abort reads in process
go func() {
select {
case <-srv.closing:
ch.Close()
case <-closing:
}
}()
err = srv.requestWorker(ch)
if err != nil {
// log.Printf("Error handling service request for channel id '%d'. %s\n", ch.channelID, err)
return
}
// log.Printf("Success closing secure channel '%d'.\n", ch.channelID)
}
// requestWorker receives service requests from channel and processes them.
func (srv *Server) requestWorker(ch *serverSecureChannel) error {
for {
req, id, err := ch.readRequest()
if err != nil {
return err
}
err = srv.handleRequest(ch, req, id)
if err != nil {
return err
}
}
}
// handleRequest directs the request to the correct handler depending on the type of request.
func (srv *Server) handleRequest(ch *serverSecureChannel, req ua.ServiceRequest, requestid uint32) error {
switch req := req.(type) {
case *ua.PublishRequest:
return srv.handlePublish(ch, requestid, req)
case *ua.RepublishRequest:
return srv.handleRepublish(ch, requestid, req)
case *ua.ReadRequest:
return srv.handleRead(ch, requestid, req)
case *ua.WriteRequest:
return srv.handleWrite(ch, requestid, req)
case *ua.CallRequest:
return srv.handleCall(ch, requestid, req)
case *ua.BrowseRequest:
return srv.handleBrowse(ch, requestid, req)
case *ua.BrowseNextRequest:
return srv.handleBrowseNext(ch, requestid, req)
case *ua.TranslateBrowsePathsToNodeIDsRequest:
return srv.handleTranslateBrowsePathsToNodeIds(ch, requestid, req)
case *ua.CreateSubscriptionRequest:
return srv.handleCreateSubscription(ch, requestid, req)
case *ua.ModifySubscriptionRequest:
return srv.handleModifySubscription(ch, requestid, req)
case *ua.SetPublishingModeRequest:
return srv.handleSetPublishingMode(ch, requestid, req)
case *ua.DeleteSubscriptionsRequest:
return srv.handleDeleteSubscriptions(ch, requestid, req)
case *ua.CreateMonitoredItemsRequest:
return srv.handleCreateMonitoredItems(ch, requestid, req)
case *ua.ModifyMonitoredItemsRequest:
return srv.handleModifyMonitoredItems(ch, requestid, req)
case *ua.SetMonitoringModeRequest:
return srv.handleSetMonitoringMode(ch, requestid, req)
case *ua.DeleteMonitoredItemsRequest:
return srv.handleDeleteMonitoredItems(ch, requestid, req)
case *ua.HistoryReadRequest:
return srv.handleHistoryRead(ch, requestid, req)
case *ua.CreateSessionRequest:
return srv.handleCreateSession(ch, requestid, req)
case *ua.ActivateSessionRequest:
return srv.handleActivateSession(ch, requestid, req)
case *ua.CloseSessionRequest:
return srv.handleCloseSession(ch, requestid, req)
case *ua.OpenSecureChannelRequest:
return ch.handleOpenSecureChannel(requestid, req)
case *ua.CloseSecureChannelRequest:
return ch.handleCloseSecureChannel(requestid, req)
case *ua.FindServersRequest:
return srv.findServers(ch, requestid, req)
case *ua.GetEndpointsRequest:
return srv.getEndpoints(ch, requestid, req)
case *ua.RegisterNodesRequest:
return srv.handleRegisterNodes(ch, requestid, req)
case *ua.UnregisterNodesRequest:
return srv.handleUnregisterNodes(ch, requestid, req)
case *ua.SetTriggeringRequest:
return srv.handleSetTriggering(ch, requestid, req)
case *ua.CancelRequest:
return srv.handleCancel(ch, requestid, req)
default:
err := ch.Write(
&ua.ServiceFault{
ResponseHeader: ua.ResponseHeader{
Timestamp: time.Now(),
RequestHandle: req.Header().RequestHandle,
ServiceResult: ua.BadServiceUnsupported,
},
},
requestid,
)
if err != nil {
return err
}
return nil
}
}
func (srv *Server) initializeNamespace() error {
nm := srv.NamespaceManager()
if err := nm.LoadNodeSetFromBuffer(nodeset104); err != nil {
return err
}
if n, ok := nm.FindVariable(ua.VariableIDServerAuditing); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindNode(ua.MethodIDServerRequestServerStateChange); ok {
nm.DeleteNode(n, true)
}
if n, ok := nm.FindNode(ua.MethodIDServerSetSubscriptionDurable); ok {
nm.DeleteNode(n, true)
}
if n, ok := nm.FindVariable(ua.VariableIDServerServiceLevel); ok {
n.SetValue(ua.NewDataValue(byte(255), 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerRedundancyRedundancySupport); ok {
n.SetValue(ua.NewDataValue(int32(0), 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindNode(ua.VariableIDServerServerRedundancyCurrentServerID); ok {
nm.DeleteNode(n, false)
}
if n, ok := nm.FindNode(ua.VariableIDServerServerRedundancyRedundantServerArray); ok {
nm.DeleteNode(n, true)
}
if n, ok := nm.FindNode(ua.VariableIDServerServerRedundancyServerNetworkGroups); ok {
nm.DeleteNode(n, true)
}
if n, ok := nm.FindNode(ua.VariableIDServerServerRedundancyServerURIArray); ok {
nm.DeleteNode(n, true)
}
if n, ok := nm.FindVariable(ua.VariableIDServerNamespaceArray); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.NamespaceUris(), 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerArray); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.ServerUris(), 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatus); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(
ua.ServerStatusDataType{
StartTime: srv.startTime,
CurrentTime: time.Now(),
State: srv.state,
BuildInfo: srv.buildInfo,
ShutdownReason: srv.shutdownReason,
SecondsTillShutdown: srv.secondsTillShutdown,
}, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusState); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(int32(srv.State()), 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusCurrentTime); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(time.Now(), 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusSecondsTillShutdown); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.secondsTillShutdown, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusShutdownReason); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.shutdownReason, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusStartTime); ok {
n.SetValue(ua.NewDataValue(srv.startTime, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusBuildInfo); ok {
n.SetValue(ua.NewDataValue(srv.buildInfo, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusBuildInfoProductURI); ok {
n.SetValue(ua.NewDataValue(srv.buildInfo.ProductURI, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusBuildInfoManufacturerName); ok {
n.SetValue(ua.NewDataValue(srv.buildInfo.ManufacturerName, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusBuildInfoProductName); ok {
n.SetValue(ua.NewDataValue(srv.buildInfo.ProductName, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusBuildInfoSoftwareVersion); ok {
n.SetValue(ua.NewDataValue(srv.buildInfo.SoftwareVersion, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusBuildInfoBuildNumber); ok {
n.SetValue(ua.NewDataValue(srv.buildInfo.BuildNumber, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerStatusBuildInfoBuildDate); ok {
n.SetValue(ua.NewDataValue(srv.buildInfo.BuildDate, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesLocaleIDArray); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.LocaleIDArray, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesMaxStringLength); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.MaxStringLength, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesMaxArrayLength); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.MaxArrayLength, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesMaxByteStringLength); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.MaxByteStringLength, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesMaxBrowseContinuationPoints); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.MaxBrowseContinuationPoints, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesMaxHistoryContinuationPoints); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.MaxHistoryContinuationPoints, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesMaxQueryContinuationPoints); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.MaxQueryContinuationPoints, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesMinSupportedSampleRate); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.MinSupportedSampleRate, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesServerProfileArray); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.ServerProfileArray, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesAccessHistoryDataCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesInsertDataCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesReplaceDataCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesUpdateDataCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesDeleteRawCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesDeleteAtTimeCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesAccessHistoryEventsCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesMaxReturnDataValues); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesMaxReturnEventValues); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesInsertAnnotationCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesInsertEventCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesReplaceEventCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDHistoryServerCapabilitiesUpdateEventCapability); ok {
n.SetValue(ua.NewDataValue(false, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxMonitoredItemsPerCall); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxMonitoredItemsPerCall, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerBrowse); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerBrowse, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerHistoryReadData); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerHistoryReadData, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerHistoryReadEvents); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerHistoryReadEvents, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerHistoryUpdateData); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerHistoryUpdateData, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerHistoryUpdateEvents); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerHistoryUpdateEvents, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerMethodCall); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerMethodCall, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerNodeManagement); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerNodeManagement, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerRead); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerRead, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerRegisterNodes); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerRegisterNodes, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerTranslateBrowsePathsToNodeIDs); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerTranslateBrowsePathsToNodeIds, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerCapabilitiesOperationLimitsMaxNodesPerWrite); ok {
n.SetValue(ua.NewDataValue(srv.serverCapabilities.OperationLimits.MaxNodesPerWrite, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindObject(ua.ObjectIDServerServerCapabilitiesModellingRules); ok {
if mandatory, ok := nm.FindObject(ua.ObjectIDModellingRuleMandatory); ok {
mandatory.SetReferences(append(mandatory.References(), ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(n.NodeID()))))
n.SetReferences(append(n.References(), ua.NewReference(ua.ReferenceTypeIDHasComponent, false, ua.NewExpandedNodeID(mandatory.NodeID()))))
}
if mandatoryPlaceholder, ok := nm.FindObject(ua.ObjectIDModellingRuleMandatoryPlaceholder); ok {
mandatoryPlaceholder.SetReferences(append(mandatoryPlaceholder.References(), ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(n.NodeID()))))
n.SetReferences(append(n.References(), ua.NewReference(ua.ReferenceTypeIDHasComponent, false, ua.NewExpandedNodeID(mandatoryPlaceholder.NodeID()))))
}
if optional, ok := nm.FindObject(ua.ObjectIDModellingRuleOptional); ok {
optional.SetReferences(append(optional.References(), ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(n.NodeID()))))
n.SetReferences(append(n.References(), ua.NewReference(ua.ReferenceTypeIDHasComponent, false, ua.NewExpandedNodeID(optional.NodeID()))))
}
if optionalPlaceholder, ok := nm.FindObject(ua.ObjectIDModellingRuleOptionalPlaceholder); ok {
optionalPlaceholder.SetReferences(append(optionalPlaceholder.References(), ua.NewReference(ua.ReferenceTypeIDHasComponent, true, ua.NewExpandedNodeID(n.NodeID()))))
n.SetReferences(append(n.References(), ua.NewReference(ua.ReferenceTypeIDHasComponent, false, ua.NewExpandedNodeID(optionalPlaceholder.NodeID()))))
}
}
if nr, ok := nm.FindVariable(ua.VariableIDModellingRuleMandatoryNamingRule); ok {
nr.SetValue(ua.NewDataValue(int32(1), 0, time.Now(), 0, time.Now(), 0))
}
if nr, ok := nm.FindVariable(ua.VariableIDModellingRuleMandatoryPlaceholderNamingRule); ok {
nr.SetValue(ua.NewDataValue(int32(1), 0, time.Now(), 0, time.Now(), 0))
}
if nr, ok := nm.FindVariable(ua.VariableIDModellingRuleOptionalNamingRule); ok {
nr.SetValue(ua.NewDataValue(int32(2), 0, time.Now(), 0, time.Now(), 0))
}
if nr, ok := nm.FindVariable(ua.VariableIDModellingRuleOptionalPlaceholderNamingRule); ok {
nr.SetValue(ua.NewDataValue(int32(2), 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsEnabledFlag); ok {
n.accessLevel = ua.AccessLevelsCurrentRead
n.SetValue(ua.NewDataValue(srv.serverDiagnostics, 0, time.Now(), 0, time.Now(), 0))
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummary); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummaryCumulatedSessionCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.CumulatedSessionCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummaryCumulatedSubscriptionCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.CumulatedSubscriptionCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummaryCurrentSessionCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.CurrentSessionCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummaryCurrentSubscriptionCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.CurrentSubscriptionCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummaryServerViewCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.ServerViewCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummarySecurityRejectedSessionCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.SecurityRejectedSessionCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummarySessionAbortCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.SessionAbortCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummaryPublishingIntervalCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.PublishingIntervalCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummarySecurityRejectedRequestsCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.SecurityRejectedRequestsCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummaryRejectedRequestsCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.RejectedRequestsCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummaryRejectedSessionCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.RejectedSessionCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsServerDiagnosticsSummarySessionTimeoutCount); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
return ua.NewDataValue(srv.serverDiagnosticsSummary.SessionTimeoutCount, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindVariable(ua.VariableIDServerServerDiagnosticsSubscriptionDiagnosticsArray); ok {
n.SetReadValueHandler(func(session *Session, req ua.ReadValueID) ua.DataValue {
if !srv.serverDiagnostics {
return ua.NewDataValue(nil, 0, time.Now(), 0, time.Now(), 0)
}
a := make([]ua.ExtensionObject, 0, 16)
for _, s := range srv.SubscriptionManager().subscriptionsByID {
s.RLock()
e := ua.SubscriptionDiagnosticsDataType{
SessionID: s.sessionId,
SubscriptionID: s.id,
Priority: s.priority,
PublishingInterval: s.publishingInterval,
MaxKeepAliveCount: s.maxKeepAliveCount,
MaxLifetimeCount: s.maxLifetimeCount,
MaxNotificationsPerPublish: s.maxNotificationsPerPublish,
PublishingEnabled: s.publishingEnabled,
ModifyCount: s.modifyCount,
// EnableCount: uint32(0),
// DisableCount: uint32(0),
RepublishRequestCount: s.republishRequestCount,
RepublishMessageRequestCount: s.republishMessageRequestCount,
RepublishMessageCount: s.republishMessageCount,
// TransferRequestCount: uint32(0),
// TransferredToAltClientCount: uint32(0),
// TransferredToSameClientCount: uint32(0),
PublishRequestCount: s.publishRequestCount,
DataChangeNotificationsCount: s.dataChangeNotificationsCount,
EventNotificationsCount: s.eventNotificationsCount,
NotificationsCount: s.notificationsCount,
LatePublishRequestCount: s.latePublishRequestCount,
CurrentKeepAliveCount: s.keepAliveCount,
CurrentLifetimeCount: s.lifetimeCount,
UnacknowledgedMessageCount: s.unacknowledgedMessageCount,
// DiscardedMessageCount: uint32(0),
MonitoredItemCount: s.monitoredItemCount,
DisabledMonitoredItemCount: s.disabledMonitoredItemCount,
MonitoringQueueOverflowCount: s.monitoringQueueOverflowCount,
NextSequenceNumber: s.nextSequenceNumber,
// EventQueueOverFlowCount: uint32(0),
}
s.RUnlock()
a = append(a, e)
}
return ua.NewDataValue(a, 0, time.Now(), 0, time.Now(), 0)
})
}
if n, ok := nm.FindNode(ua.VariableIDServerServerDiagnosticsSamplingIntervalDiagnosticsArray); ok {
nm.DeleteNode(n, true)
}
if n, ok := nm.FindMethod(ua.MethodIDServerGetMonitoredItems); ok {
n.SetCallMethodHandler(func(session *Session, req ua.CallMethodRequest) ua.CallMethodResult {
if len(req.InputArguments) < 1 {
return ua.CallMethodResult{StatusCode: ua.BadArgumentsMissing}
}
if len(req.InputArguments) > 1 {
return ua.CallMethodResult{StatusCode: ua.BadTooManyArguments}
}
opResult := ua.Good
argsResults := make([]ua.StatusCode, 1)
subscriptionID, ok := req.InputArguments[0].(uint32)
if !ok {
opResult = ua.BadInvalidArgument
argsResults[0] = ua.BadTypeMismatch
}
if opResult == ua.BadInvalidArgument {
return ua.CallMethodResult{StatusCode: opResult, InputArgumentResults: argsResults}
}
sub, ok := srv.SubscriptionManager().Get(subscriptionID)
if !ok {
return ua.CallMethodResult{StatusCode: ua.BadSubscriptionIDInvalid}
}
if session == nil || sub.session != session {
return ua.CallMethodResult{StatusCode: ua.BadUserAccessDenied}
}
svrHandles := []uint32{}
cliHandles := []uint32{}
for _, item := range sub.Items() {
svrHandles = append(svrHandles, item.ID())
cliHandles = append(cliHandles, item.ClientHandle())
}
return ua.CallMethodResult{OutputArguments: []ua.Variant{svrHandles, cliHandles}}
})
}
if n, ok := nm.FindMethod(ua.MethodIDServerGetMonitoredItems); ok {
n.SetCallMethodHandler(func(session *Session, req ua.CallMethodRequest) ua.CallMethodResult {
if len(req.InputArguments) < 1 {
return ua.CallMethodResult{StatusCode: ua.BadArgumentsMissing}
}
if len(req.InputArguments) > 1 {
return ua.CallMethodResult{StatusCode: ua.BadTooManyArguments}
}
opResult := ua.Good
argsResults := make([]ua.StatusCode, 1)
subscriptionID, ok := req.InputArguments[0].(uint32)
if !ok {
opResult = ua.BadInvalidArgument
argsResults[0] = ua.BadTypeMismatch
}
if opResult == ua.BadInvalidArgument {
return ua.CallMethodResult{StatusCode: opResult, InputArgumentResults: argsResults}
}
sub, ok := srv.SubscriptionManager().Get(subscriptionID)
if !ok {
return ua.CallMethodResult{StatusCode: ua.BadSubscriptionIDInvalid}
}
if session == nil || sub.session != session {
return ua.CallMethodResult{StatusCode: ua.BadUserAccessDenied}
}
svrHandles := []uint32{}
cliHandles := []uint32{}
for _, item := range sub.Items() {
svrHandles = append(svrHandles, item.ID())
cliHandles = append(cliHandles, item.ClientHandle())
}
return ua.CallMethodResult{OutputArguments: []ua.Variant{svrHandles, cliHandles}}
})
}
if n, ok := nm.FindMethod(ua.MethodIDServerResendData); ok {
n.SetCallMethodHandler(func(session *Session, req ua.CallMethodRequest) ua.CallMethodResult {
if len(req.InputArguments) < 1 {
return ua.CallMethodResult{StatusCode: ua.BadArgumentsMissing}
}
if len(req.InputArguments) > 1 {
return ua.CallMethodResult{StatusCode: ua.BadTooManyArguments}
}
opResult := ua.Good
argsResults := make([]ua.StatusCode, 1)
subscriptionID, ok := req.InputArguments[0].(uint32)
if !ok {
opResult = ua.BadInvalidArgument
argsResults[0] = ua.BadTypeMismatch
}
if opResult == ua.BadInvalidArgument {
return ua.CallMethodResult{StatusCode: opResult, InputArgumentResults: argsResults}
}
sub, ok := srv.SubscriptionManager().Get(subscriptionID)
if !ok {
return ua.CallMethodResult{StatusCode: ua.BadSubscriptionIDInvalid}
}
if session == nil || sub.session != session {
return ua.CallMethodResult{StatusCode: ua.BadUserAccessDenied}
}
sub.resendData()
return ua.CallMethodResult{OutputArguments: []ua.Variant{}}
})
}
return nil
}
func (srv *Server) buildEndpointDescriptions() []ua.EndpointDescription {
eds := []ua.EndpointDescription{}
if srv.allowSecurityPolicyNone {
toks := []ua.UserTokenPolicy{}
if srv.anonymousIdentityAuthenticator != nil {
toks = append(toks, ua.UserTokenPolicy{
PolicyID: fmt.Sprintf("%s_%d", ua.UserTokenTypeAnonymous, len(eds)),
TokenType: ua.UserTokenTypeAnonymous,
SecurityPolicyURI: ua.SecurityPolicyURINone,
})
}
if srv.userNameIdentityAuthenticator != nil {
toks = append(toks, ua.UserTokenPolicy{
PolicyID: fmt.Sprintf("%s_%d", ua.UserTokenTypeUserName, len(eds)),
TokenType: ua.UserTokenTypeUserName,
SecurityPolicyURI: ua.SecurityPolicyURIBasic256Sha256,
})
}
if srv.x509IdentityAuthenticator != nil {
toks = append(toks, ua.UserTokenPolicy{
PolicyID: fmt.Sprintf("%s_%d", ua.UserTokenTypeCertificate, len(eds)),
TokenType: ua.UserTokenTypeCertificate,
SecurityPolicyURI: ua.SecurityPolicyURIBasic256Sha256,
})
}
eds = append(eds, ua.EndpointDescription{
EndpointURL: srv.endpointURL,
Server: srv.localDescription,
ServerCertificate: ua.ByteString(srv.LocalCertificate()),
SecurityMode: ua.MessageSecurityModeNone,
SecurityPolicyURI: ua.SecurityPolicyURINone,
TransportProfileURI: ua.TransportProfileURIUaTcpTransport,
SecurityLevel: byte(len(eds)),