public T ReadExtensionObject <T>(string fieldName)
where T : IEncodable
{
NodeId nodeId = this.ReadNodeId(null);
byte b = this.reader.ReadByte();
if (b == 1)
{
ExpandedNodeId binaryEncodingId = NodeId.ToExpandedNodeId(nodeId, this.channel?.NamespaceUris);
Type type2;
if (!UaTcpSecureChannel.BinaryEncodingIdToTypeDictionary.TryGetValue(binaryEncodingId, out type2))
{
throw new ServiceResultException(StatusCodes.BadDataTypeIdUnknown);
}
if (!typeof(T).GetTypeInfo().IsAssignableFrom(type2.GetTypeInfo()))
{
throw new ServiceResultException(StatusCodes.BadDecodingError);
}
var len = this.ReadInt32(null);
var encodable = Activator.CreateInstance(type2) as IEncodable;
encodable.Decode(this);
return((T)encodable);
}
// TODO: else if (b = 2) use XmlDecoder
return(default(T));
}
public ExtensionObject ReadExtensionObject(string fieldName)
{
Type type;
NodeId nodeId = this.ReadNodeId(null);
byte b = this.reader.ReadByte();
if (b == (byte)BodyType.ByteString) // BodyType Encodable is encoded as ByteString.
{
ExpandedNodeId binaryEncodingId = NodeId.ToExpandedNodeId(nodeId, this.channel?.NamespaceUris);
if (this.channel.TryGetTypeFromEncodingId(nodeId, out type))
{
var len = this.ReadInt32(null);
var encodable = Activator.CreateInstance(type) as IEncodable;
encodable.Decode(this);
return(new ExtensionObject(encodable, binaryEncodingId));
}
return(new ExtensionObject(this.ReadByteString(null), binaryEncodingId));
}
if (b == (byte)BodyType.XmlElement)
{
ExpandedNodeId xmlEncodingId = NodeId.ToExpandedNodeId(nodeId, this.channel?.NamespaceUris);
return(new ExtensionObject(this.ReadXElement(null), xmlEncodingId));
}
return(null);
}
public ExtensionObject ReadExtensionObject(string fieldName)
{
NodeId nodeId = this.ReadNodeId(null);
byte b = this.reader.ReadByte();
if (b == 1)
{
ExpandedNodeId binaryEncodingId = NodeId.ToExpandedNodeId(nodeId, this.channel?.NamespaceUris);
Type type2;
if (UaTcpSecureChannel.BinaryEncodingIdToTypeDictionary.TryGetValue(binaryEncodingId, out type2))
{
var len = this.ReadInt32(null);
var encodable = Activator.CreateInstance(type2) as IEncodable;
encodable.Decode(this);
return(new ExtensionObject(encodable));
}
return(new ExtensionObject(this.ReadByteString(null), binaryEncodingId));
}
else if (b == 2)
{
ExpandedNodeId xmlEncodingId = NodeId.ToExpandedNodeId(nodeId, this.channel?.NamespaceUris);
return(new ExtensionObject(this.ReadXElement(null), xmlEncodingId));
}
return(null);
}
/// <summary>
/// Returns a uri that identifies the node id uniquely. If the server
/// uri information is provided, and the it contains a server name at
/// index 0, the node id will be formatted as an expanded node id uri
/// (see below). Otherwise, the resource is the namespace and not the
/// server.
/// </summary>
/// <param name="nodeId"></param>
/// <param name="context"></param>
/// <param name="noRelativeUriAllowed"></param>
/// <returns></returns>
public static string AsString(this NodeId nodeId, ServiceMessageContext context,
bool noRelativeUriAllowed = false)
{
if (NodeId.IsNull(nodeId))
{
return(null);
}
return(nodeId.ToExpandedNodeId(context?.NamespaceUris).AsString(context,
noRelativeUriAllowed));
}
public void FetchAllReferenceTypes()
{
var bindingFlags = BindingFlags.Instance |
BindingFlags.Static |
BindingFlags.Public;
var fieldValues = typeof(ReferenceTypeIds)
.GetFields(bindingFlags)
.Select(field => NodeId.ToExpandedNodeId((NodeId)field.GetValue(null), Session.NamespaceUris));
Session.FetchTypeTree(new ExpandedNodeIdCollection(fieldValues));
}
public bool TryGetExpandedNodeId(NodeId nodeId, out ExpandedNodeId eId)
{
if (nodeId == null)
{
eId = null;
return(false);
}
eId = NodeId.ToExpandedNodeId(nodeId, _namespaceUris);
return(eId != null);
}
/// <summary>
/// Helper to cast a enumeration node value to an enumeration type.
/// </summary>
private void CastInt32ToEnum(VariableNode variableNode, DataValue value)
{
if (value.Value?.GetType() == typeof(Int32))
{
// test if this is an enum datatype?
Type systemType = m_session.Factory.GetSystemType(
NodeId.ToExpandedNodeId(variableNode.DataType, m_session.NamespaceUris)
);
if (systemType != null)
{
value.Value = Enum.ToObject(systemType, value.Value);
}
}
}
public void NodeIdConstructor()
{
Guid id1 = Guid.NewGuid();
NodeId nodeId1 = new NodeId(id1);
// implicit conversion;
NodeId inodeId1 = id1;
Assert.AreEqual(nodeId1, inodeId1);
byte[] id2 = new byte[] { 65, 66, 67, 68, 69 };
NodeId nodeId2 = new NodeId(id2);
// implicit conversion;
NodeId inodeId2 = id2;
Assert.AreEqual(nodeId2, inodeId2);
_ = nodeId2 < inodeId2;
_ = nodeId2 == inodeId2;
_ = nodeId2 > inodeId2;
string text = "i=123";
NodeId nodeIdText = new NodeId(text);
Assert.AreEqual(123, nodeIdText.Identifier);
// implicit conversion;
NodeId inodeIdText = text;
Assert.AreEqual(nodeIdText, inodeIdText);
_ = nodeIdText < inodeIdText;
_ = nodeIdText == inodeIdText;
_ = nodeIdText > inodeIdText;
_ = nodeIdText < nodeId2;
_ = nodeIdText == nodeId2;
_ = nodeIdText > nodeId2;
_ = new NodeId((object)(uint)123, 123);
_ = new NodeId((object)"Test", 123);
_ = new NodeId((object)id2, 123);
_ = new NodeId((object)null, 123);
_ = new NodeId((object)id1, 123);
Assert.Throws <ArgumentException>(() => _ = new NodeId((object)(int)123, 123));
Assert.Throws <ServiceResultException>(() => _ = NodeId.Create((uint)123, "urn:xyz", null));
Assert.Throws <ServiceResultException>(() => _ = NodeId.Parse("ns="));
Assert.IsNull(NodeId.ToExpandedNodeId(null, null));
}
/// <summary>
/// Decodes a message from a buffer.
/// </summary>
private static IEncodeable DecodeBinaryMessage(Stream stream,
ServiceMessageContext context)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
MemoryStream buffer = null;
try {
//
// Binary decoder unfortunately uses seeking (to keep track of
// position). Therefore we need to wrap a non seeking stream.
//
if (!stream.CanSeek)
{
// Read entire buffer and pass as memory stream.
var segment = stream.ReadAsBuffer();
stream = buffer = new MemoryStream(segment.Array, 0,
segment.Count);
}
using (var decoder = new BinaryDecoder(stream, context)) {
// read the node id.
var typeId = decoder.ReadNodeId(null);
// convert to absolute node id.
var absoluteId = NodeId.ToExpandedNodeId(typeId,
context.NamespaceUris);
// lookup message type.
var actualType = context.Factory.GetSystemType(absoluteId);
if (actualType == null)
{
throw new ServiceResultException(StatusCodes.BadEncodingError,
$"Cannot decode message with type id: {absoluteId}.");
}
// read the message.
return(decoder.ReadEncodeable(null, actualType));
}
}
finally {
buffer?.Dispose();
}
}
public void NodeCache_References()
{
INodeCache nodeCache = Session.NodeCache;
Assert.IsNotNull(nodeCache);
// ensure the predefined types are loaded
nodeCache.LoadUaDefinedTypes(Session.SystemContext);
// check on all reference type ids
var refTypeDictionary = typeof(ReferenceTypeIds).GetFields(BindingFlags.Public | BindingFlags.Static)
.Where(f => f.FieldType == typeof(NodeId))
.ToDictionary(f => f.Name, f => (NodeId)f.GetValue(null));
TestContext.Out.WriteLine("Testing {0} references", refTypeDictionary.Count);
foreach (var property in refTypeDictionary)
{
TestContext.Out.WriteLine("FindReferenceTypeName({0})={1}", property.Value, property.Key);
// find the Qualified Name
var qn = nodeCache.FindReferenceTypeName(property.Value);
Assert.NotNull(qn);
Assert.AreEqual(property.Key, qn.Name);
// find the node by name
var refId = nodeCache.FindReferenceType(new QualifiedName(property.Key));
Assert.NotNull(refId);
Assert.AreEqual(property.Value, refId);
// is the node id known?
var isKnown = nodeCache.IsKnown(property.Value);
Assert.IsTrue(isKnown);
// is it a reference?
var isTypeOf = nodeCache.IsTypeOf(
NodeId.ToExpandedNodeId(refId, Session.NamespaceUris),
NodeId.ToExpandedNodeId(ReferenceTypeIds.References, Session.NamespaceUris));
Assert.IsTrue(isTypeOf);
// negative test
isTypeOf = nodeCache.IsTypeOf(
NodeId.ToExpandedNodeId(refId, Session.NamespaceUris),
NodeId.ToExpandedNodeId(DataTypeIds.Byte, Session.NamespaceUris));
Assert.IsFalse(isTypeOf);
var subTypes = nodeCache.FindSubTypes(NodeId.ToExpandedNodeId(refId, Session.NamespaceUris));
Assert.NotNull(subTypes);
}
}
/// <summary>
/// save server connection settings and node subscription list to app storage
/// <summary>
private OpcuaSessionConfig SaveSessionConfig(string targetfile, string sesssionName, Session session)
{
OpcuaSessionConfig sessionConfig = null;
if (session != null)
{
try
{
sessionConfig = new OpcuaSessionConfig();
sessionConfig.timestamp = DateTime.Now;
sessionConfig.endpoint = session.ConfiguredEndpoint;
sessionConfig.sessionname = sesssionName;
sessionConfig.monitoredlist = new List <MonitoredNode>();
sessionConfig.publishinterval = session.DefaultSubscription.PublishingInterval;
NamespaceTable namespaceTable = new NamespaceTable();
DataValue namespaceArrayNodeValue = session.ReadValue(VariableIds.Server_NamespaceArray);
namespaceTable.Update(namespaceArrayNodeValue.GetValue <string[]>(null));
//collect monitored list
foreach (MonitoredItem x in session.DefaultSubscription.MonitoredItems)
{
int trimStartIndex = x.DisplayName.IndexOf(" (");
var displayName = x.DisplayName.Substring(trimStartIndex + 2);
displayName = displayName.Remove(displayName.IndexOf(" -"));
var description = (trimStartIndex >= 0) ? x.DisplayName.Remove(trimStartIndex) : x.DisplayName;
ExpandedNodeId expendedId = NodeId.ToExpandedNodeId(x.StartNodeId, namespaceTable);
MonitoredNode monnode = new MonitoredNode(expendedId.ToString(), displayName, description);
sessionConfig.monitoredlist.Add(monnode);
}
sessionConfig.SaveToJsonFile(targetfile);
}
catch (Exception exception)
{
GuiUtils.HandleException(String.Empty, GuiUtils.CallerName(), exception);
sessionConfig = null;
}
}
return(sessionConfig);
}
/// <summary>
/// Helper to ensure the expanded nodeId contains a valid namespaceUri.
/// </summary>
/// <param name="expandedNodeId">The expanded nodeId.</param>
/// <param name="namespaceTable">The session namespace table.</param>
/// <returns>The normalized expanded nodeId.</returns>
private ExpandedNodeId NormalizeExpandedNodeId(ExpandedNodeId expandedNodeId)
{
var nodeId = ExpandedNodeId.ToNodeId(expandedNodeId, m_session.NamespaceUris);
return NodeId.ToExpandedNodeId(nodeId, m_session.NamespaceUris);
}
public void FetchTypeTree()
{
Session.FetchTypeTree(NodeId.ToExpandedNodeId(DataTypeIds.BaseDataType, Session.NamespaceUris));
}
private async Task LoadChildrenAsync(ReferenceDescriptionViewModel parent)
{
try
{
var token = this.cts.Token;
await [email protected](token);
this.NotifyPropertyChanged("IsLoading");
try
{
parent.Children.Clear();
do
{
try
{
if (this.channel == null || this.channel.State != CommunicationState.Opened)
{
var getEndpointsRequest = new GetEndpointsRequest
{
EndpointUrl = this.endpointUrl,
ProfileUris = new[] { TransportProfileUris.UaTcpTransport }
};
var getEndpointsResponse = await UaTcpDiscoveryClient.GetEndpointsAsync(getEndpointsRequest);
token.ThrowIfCancellationRequested();
var selectedEndpoint = getEndpointsResponse.Endpoints.OrderBy(e => e.SecurityLevel).First();
if (selectedEndpoint.UserIdentityTokens.Any(p => p.TokenType == UserTokenType.Anonymous))
{
this.HideLoginPanel();
this.userIdentity = new AnonymousIdentity();
}
else if (selectedEndpoint.UserIdentityTokens.Any(p => p.TokenType == UserTokenType.UserName))
{
if (!this.showingLoginPanel)
{
this.ShowLoginPanel();
return;
}
else if (!this.ValidateLoginCredentials())
{
return;
}
else
{
this.userIdentity = new UserNameIdentity(this.userName, this.password);
}
}
else
{
throw new NotImplementedException("Browser supports only UserName and Anonymous identity, for now.");
}
dataTypeCache = new Dictionary <ExpandedNodeId, Type>();
this.channel = new UaTcpSessionChannel(
this.localDescription,
this.CertificateStore,
this.userIdentity,
selectedEndpoint);
await this.channel.OpenAsync();
}
token.ThrowIfCancellationRequested();
var rds = new List <ReferenceDescription>();
var browseRequest = new BrowseRequest {
NodesToBrowse = new[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(parent.NodeId, this.channel.NamespaceUris), ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), ResultMask = (uint)BrowseResultMask.TargetInfo, NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, BrowseDirection = BrowseDirection.Forward, IncludeSubtypes = true
} }
};
var browseResponse = await this.channel.BrowseAsync(browseRequest);
rds.AddRange(browseResponse.Results.Where(result => result.References != null).SelectMany(result => result.References));
var continuationPoints = browseResponse.Results.Select(br => br.ContinuationPoint).Where(cp => cp != null).ToArray();
while (continuationPoints.Length > 0)
{
token.ThrowIfCancellationRequested();
var browseNextRequest = new BrowseNextRequest {
ContinuationPoints = continuationPoints, ReleaseContinuationPoints = false
};
var browseNextResponse = await this.channel.BrowseNextAsync(browseNextRequest);
rds.AddRange(browseResponse.Results.Where(result => result.References != null).SelectMany(result => result.References));
}
if (rds.Count == 0)
{
return;
}
foreach (var rd in rds)
{
token.ThrowIfCancellationRequested();
var n = ExpandedNodeId.ToNodeId(rd.NodeId, this.channel.NamespaceUris);
Type dataType = null;
EventNotifierFlags notifier = EventNotifierFlags.None;
AccessLevelFlags accessLevel = AccessLevelFlags.None;
if (rd.NodeClass == NodeClass.Variable)
{
var readRequest = new ReadRequest
{
NodesToRead = new ReadValueId[]
{
new ReadValueId {
NodeId = n, AttributeId = AttributeIds.DataType
},
new ReadValueId {
NodeId = n, AttributeId = AttributeIds.ValueRank
},
new ReadValueId {
NodeId = n, AttributeId = AttributeIds.UserAccessLevel
}
}
};
var readResponse = await this.channel.ReadAsync(readRequest);
ExpandedNodeId dataTypeId, origDataTypeId;
ReferenceDescription dataTypeRef;
var dataTypeNode = readResponse.Results[0].GetValueOrDefault(NodeId.Null);
if (dataTypeNode != NodeId.Null)
{
dataTypeId = origDataTypeId = NodeId.ToExpandedNodeId(dataTypeNode, this.channel.NamespaceUris);
if (!this.dataTypeCache.TryGetValue(dataTypeId, out dataType))
{
if (!UaTcpSecureChannel.DataTypeIdToTypeDictionary.TryGetValue(dataTypeId, out dataType))
{
do
{
dataTypeNode = ExpandedNodeId.ToNodeId(dataTypeId, this.channel.NamespaceUris);
var browseRequest2 = new BrowseRequest {
NodesToBrowse = new[] { new BrowseDescription {
NodeId = dataTypeNode, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HasSubtype), ResultMask = (uint)BrowseResultMask.None, NodeClassMask = (uint)NodeClass.DataType, BrowseDirection = BrowseDirection.Inverse, IncludeSubtypes = false
} }
};
var browseResponse2 = await this.channel.BrowseAsync(browseRequest2);
dataTypeRef = browseResponse2.Results[0].References?.FirstOrDefault();
dataTypeId = dataTypeRef?.NodeId;
}while (dataTypeId != null && !UaTcpSecureChannel.DataTypeIdToTypeDictionary.TryGetValue(dataTypeId, out dataType));
if (dataTypeId == null)
{
dataType = typeof(object);
}
}
this.dataTypeCache.Add(origDataTypeId, dataType);
}
var valueRank = readResponse.Results[1].GetValueOrDefault(-1);
if (valueRank == 1)
{
dataType = dataType.MakeArrayType();
}
if (valueRank > 1)
{
dataType = dataType.MakeArrayType(valueRank);
}
}
else
{
dataType = typeof(object);
}
accessLevel = (AccessLevelFlags)Enum.ToObject(typeof(AccessLevelFlags), readResponse.Results[2].GetValueOrDefault <byte>());
}
else if (rd.NodeClass == NodeClass.Object)
{
var readRequest = new ReadRequest
{
NodesToRead = new ReadValueId[]
{
new ReadValueId {
NodeId = n, AttributeId = AttributeIds.EventNotifier
},
}
};
var readResponse = await this.channel.ReadAsync(readRequest);
notifier = (EventNotifierFlags)Enum.ToObject(typeof(EventNotifierFlags), readResponse.Results[0].GetValueOrDefault <byte>());
}
parent.Children.Add(new ReferenceDescriptionViewModel(rd, dataType, accessLevel, notifier, parent, this.LoadChildrenAsync));
await Task.Yield();
}
break; // exit while;
}
catch (OperationCanceledException ex)
{
// exit while;
}
catch (ServiceResultException ex)
{
Console.WriteLine("ServiceResultException: {0}", ex);
if (this.channel != null)
{
await this.channel.AbortAsync(token);
this.channel = null;
}
if (ex.HResult == unchecked ((int)StatusCodes.BadSessionIdInvalid))
{
continue;
}
}
catch (Exception ex)
{
Console.WriteLine("Exception {0}", ex);
if (this.channel != null)
{
await this.channel.AbortAsync(token);
this.channel = null;
}
}
try
{
await Task.Delay(5000, token);
}
catch (OperationCanceledException)
{
}
}while (!token.IsCancellationRequested);
}
catch (Exception ex)
{
Console.WriteLine("Exception {0}", ex);
}
finally
{
[email protected]();
this.NotifyPropertyChanged("IsLoading");
}
}
catch (OperationCanceledException)
{
// only get here if cancelled while waiting for lock
}
}
