open62541/src/server/ua_server_ns0.c

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "ua_server_internal.h"
#include "ua_securechannel_manager.h"
#include "ua_session_manager.h"
#include "ua_util.h"
#include "ua_services.h"
#include "ua_nodeids.h"

#ifdef UA_ENABLE_SUBSCRIPTIONS
#include "ua_subscription.h"
#endif

#if defined(UA_ENABLE_METHODCALLS) && defined(UA_ENABLE_SUBSCRIPTIONS)
UA_THREAD_LOCAL UA_Session* methodCallSession = NULL;
#endif

#ifndef UA_ENABLE_GENERATE_NAMESPACE0

/****************/
/* Data Sources */
/****************/

static UA_StatusCode
readStatus(void *handle, const UA_NodeId nodeid, UA_Boolean sourceTimeStamp,
           const UA_NumericRange *range, UA_DataValue *value) {
    if(range) {
        value->hasStatus = true;
        value->status = UA_STATUSCODE_BADINDEXRANGEINVALID;
        return UA_STATUSCODE_GOOD;
    }

    UA_Server *server = (UA_Server*)handle;
    UA_ServerStatusDataType *status = UA_ServerStatusDataType_new();
    status->startTime = server->startTime;
    status->currentTime = UA_DateTime_now();
    status->state = UA_SERVERSTATE_RUNNING;
    status->secondsTillShutdown = 0;
    UA_BuildInfo_copy(&server->config.buildInfo, &status->buildInfo);

    value->value.type = &UA_TYPES[UA_TYPES_SERVERSTATUSDATATYPE];
    value->value.arrayLength = 0;
    value->value.data = status;
    value->value.arrayDimensionsSize = 0;
    value->value.arrayDimensions = NULL;
    value->hasValue = true;
    if(sourceTimeStamp) {
        value->hasSourceTimestamp = true;
        value->sourceTimestamp = UA_DateTime_now();
    }
    return UA_STATUSCODE_GOOD;
}

static UA_StatusCode
readNamespaces(void *handle, const UA_NodeId nodeid, UA_Boolean sourceTimestamp,
               const UA_NumericRange *range, UA_DataValue *value) {
    if(range) {
        value->hasStatus = true;
        value->status = UA_STATUSCODE_BADINDEXRANGEINVALID;
        return UA_STATUSCODE_GOOD;
    }
    UA_Server *server = (UA_Server*)handle;
    UA_StatusCode retval;
    retval = UA_Variant_setArrayCopy(&value->value, server->namespaces,
                                     server->namespacesSize, &UA_TYPES[UA_TYPES_STRING]);
    if(retval != UA_STATUSCODE_GOOD)
        return retval;
    value->hasValue = true;
    if(sourceTimestamp) {
        value->hasSourceTimestamp = true;
        value->sourceTimestamp = UA_DateTime_now();
    }
    return UA_STATUSCODE_GOOD;
}

static UA_StatusCode
writeNamespaces(void *handle, const UA_NodeId nodeid, const UA_Variant *data,
                const UA_NumericRange *range) {
    UA_Server *server = (UA_Server*)handle;

    /* Check the data type */
    if(data->type != &UA_TYPES[UA_TYPES_STRING])
        return UA_STATUSCODE_BADTYPEMISMATCH;

    /* Check that the variant is not empty */
    if(!data->data)
        return UA_STATUSCODE_BADTYPEMISMATCH;

    /* TODO: Writing with a range is not implemented */
    if(range)
        return UA_STATUSCODE_BADINTERNALERROR;

    UA_String *newNamespaces = (UA_String*)data->data;
    size_t newNamespacesSize = data->arrayLength;

    /* Test if we append to the existing namespaces */
    if(newNamespacesSize <= server->namespacesSize)
        return UA_STATUSCODE_BADTYPEMISMATCH;

    /* Test if the existing namespaces are unchanged */
    for(size_t i = 0; i < server->namespacesSize; ++i) {
        if(!UA_String_equal(&server->namespaces[i], &newNamespaces[i]))
            return UA_STATUSCODE_BADINTERNALERROR;
    }

    /* Add namespaces */
    for(size_t i = server->namespacesSize; i < newNamespacesSize; ++i)
        addNamespace(server, newNamespaces[i]);
    return UA_STATUSCODE_GOOD;
}

static UA_StatusCode
readCurrentTime(void *handle, const UA_NodeId nodeid, UA_Boolean sourceTimeStamp,
                const UA_NumericRange *range, UA_DataValue *value) {
    if(range) {
        value->hasStatus = true;
        value->status = UA_STATUSCODE_BADINDEXRANGEINVALID;
        return UA_STATUSCODE_GOOD;
    }
    UA_DateTime currentTime = UA_DateTime_now();
    UA_StatusCode retval = UA_Variant_setScalarCopy(&value->value, &currentTime,
                                                    &UA_TYPES[UA_TYPES_DATETIME]);
    if(retval != UA_STATUSCODE_GOOD)
        return retval;
    value->hasValue = true;
    if(sourceTimeStamp) {
        value->hasSourceTimestamp = true;
        value->sourceTimestamp = currentTime;
    }
    return UA_STATUSCODE_GOOD;
}

#if defined(UA_ENABLE_METHODCALLS) && defined(UA_ENABLE_SUBSCRIPTIONS)
static UA_StatusCode
readMonitoredItems(void *handle, const UA_NodeId *objectId,
                   const UA_NodeId *sessionId, void *sessionHandle,
                   size_t inputSize, const UA_Variant *input,
                   size_t outputSize, UA_Variant *output) {
    UA_UInt32 subscriptionId = *((UA_UInt32*)(input[0].data));
    UA_Session* session = methodCallSession;
    UA_Subscription* subscription = UA_Session_getSubscriptionByID(session, subscriptionId);
    if(!subscription)
        return UA_STATUSCODE_BADSUBSCRIPTIONIDINVALID;

    UA_UInt32 sizeOfOutput = 0;
    UA_MonitoredItem* monitoredItem;
    LIST_FOREACH(monitoredItem, &subscription->monitoredItems, listEntry) {
        ++sizeOfOutput;
    }
    if(sizeOfOutput==0)
        return UA_STATUSCODE_GOOD;

    UA_UInt32* clientHandles = (UA_UInt32 *)UA_Array_new(sizeOfOutput, &UA_TYPES[UA_TYPES_UINT32]);
    UA_UInt32* serverHandles = (UA_UInt32 *)UA_Array_new(sizeOfOutput, &UA_TYPES[UA_TYPES_UINT32]);
    UA_UInt32 i = 0;
    LIST_FOREACH(monitoredItem, &subscription->monitoredItems, listEntry) {
        clientHandles[i] = monitoredItem->clientHandle;
        serverHandles[i] = monitoredItem->itemId;
        ++i;
    }
    UA_Variant_setArray(&output[0], clientHandles, sizeOfOutput, &UA_TYPES[UA_TYPES_UINT32]);
    UA_Variant_setArray(&output[1], serverHandles, sizeOfOutput, &UA_TYPES[UA_TYPES_UINT32]);
    return UA_STATUSCODE_GOOD;
}
#endif /* defined(UA_ENABLE_METHODCALLS) && defined(UA_ENABLE_SUBSCRIPTIONS) */

/*****************/
/* Node Creation */
/*****************/

static void
addReferenceInternal(UA_Server *server, UA_UInt32 sourceId, UA_UInt32 refTypeId,
                     UA_UInt32 targetId, UA_Boolean isForward) {
    UA_AddReferencesItem item;
    UA_AddReferencesItem_init(&item);
    item.sourceNodeId.identifier.numeric = sourceId;
    item.referenceTypeId.identifier.numeric = refTypeId;
    item.isForward = isForward;
    item.targetNodeId.nodeId.identifier.numeric = targetId;
    UA_RCU_LOCK();
    Service_AddReferences_single(server, &adminSession, &item);
    UA_RCU_UNLOCK();
}

static void
addDataTypeNode(UA_Server *server, char* name, UA_UInt32 datatypeid,
                UA_Boolean isAbstract, UA_UInt32 parentid) {
    UA_DataTypeAttributes attr;
    UA_DataTypeAttributes_init(&attr);
    attr.displayName = UA_LOCALIZEDTEXT("en_US", name);
    attr.isAbstract = isAbstract;
    UA_Server_addDataTypeNode(server, UA_NODEID_NUMERIC(0, datatypeid),
                              UA_NODEID_NUMERIC(0, parentid), UA_NODEID_NULL,
                              UA_QUALIFIEDNAME(0, name), attr, NULL, NULL);
}

static void
addObjectTypeNode(UA_Server *server, char* name, UA_UInt32 objecttypeid,
                  UA_Boolean isAbstract, UA_UInt32 parentid) {
    UA_ObjectTypeAttributes attr;
    UA_ObjectTypeAttributes_init(&attr);
    attr.displayName = UA_LOCALIZEDTEXT("en_US", name);
    attr.isAbstract = isAbstract;
    UA_Server_addObjectTypeNode(server, UA_NODEID_NUMERIC(0, objecttypeid),
                                UA_NODEID_NUMERIC(0, parentid), UA_NODEID_NULL,
                                UA_QUALIFIEDNAME(0, name), attr, NULL, NULL);
}

static void
addObjectNode(UA_Server *server, char* name, UA_UInt32 objectid,
              UA_UInt32 parentid, UA_UInt32 referenceid, UA_UInt32 typeid) {
    UA_ObjectAttributes object_attr;
    UA_ObjectAttributes_init(&object_attr);
    object_attr.displayName = UA_LOCALIZEDTEXT("en_US", name);
    UA_Server_addObjectNode(server, UA_NODEID_NUMERIC(0, objectid),
                            UA_NODEID_NUMERIC(0, parentid),
                            UA_NODEID_NUMERIC(0, referenceid),
                            UA_QUALIFIEDNAME(0, name),
                            UA_NODEID_NUMERIC(0, typeid),
                            object_attr, NULL, NULL);

}

static void
addReferenceTypeNode(UA_Server *server, char* name, char *inverseName, UA_UInt32 referencetypeid,
                     UA_Boolean isabstract, UA_Boolean symmetric, UA_UInt32 parentid) {
    UA_ReferenceTypeAttributes reference_attr;
    UA_ReferenceTypeAttributes_init(&reference_attr);
    reference_attr.displayName = UA_LOCALIZEDTEXT("en_US", name);
    reference_attr.isAbstract = isabstract;
    reference_attr.symmetric = symmetric;
    if(inverseName)
        reference_attr.inverseName = UA_LOCALIZEDTEXT("en_US", inverseName);
    UA_Server_addReferenceTypeNode(server, UA_NODEID_NUMERIC(0, referencetypeid),
                                   UA_NODEID_NUMERIC(0, parentid), UA_NODEID_NULL,
                                   UA_QUALIFIEDNAME(0, name), reference_attr, NULL, NULL);
}

static void
addVariableTypeNode(UA_Server *server, char* name, UA_UInt32 variabletypeid,
                    UA_Boolean isAbstract, UA_Int32 valueRank, UA_UInt32 dataType,
                    const UA_DataType *type, UA_UInt32 parentid) {
    UA_VariableTypeAttributes attr;
    UA_VariableTypeAttributes_init(&attr);
    attr.displayName = UA_LOCALIZEDTEXT("en_US", name);
    attr.isAbstract = isAbstract;
    attr.dataType = UA_NODEID_NUMERIC(0, dataType);
    attr.valueRank = valueRank;
    if(type)
        UA_Variant_setScalar(&attr.value, UA_new(type), type);
    UA_Server_addVariableTypeNode(server, UA_NODEID_NUMERIC(0, variabletypeid),
                                  UA_NODEID_NUMERIC(0, parentid), UA_NODEID_NULL,
                                  UA_QUALIFIEDNAME(0, name), UA_NODEID_NULL, attr, NULL, NULL);
}

static void
addVariableNode(UA_Server *server, UA_UInt32 nodeid, char* name, UA_Int32 valueRank,
                const UA_NodeId *dataType, UA_Variant *value, UA_UInt32 parentid,
                UA_UInt32 referenceid, UA_UInt32 typeid) {
    UA_VariableAttributes attr;
    UA_VariableAttributes_init(&attr);
    attr.displayName = UA_LOCALIZEDTEXT("en_US", name);
    attr.dataType = *dataType;
    attr.valueRank = valueRank;
    if(value)
        attr.value = *value;
    UA_Server_addVariableNode(server, UA_NODEID_NUMERIC(0, nodeid), UA_NODEID_NUMERIC(0, parentid),
                              UA_NODEID_NUMERIC(0, referenceid), UA_QUALIFIEDNAME(0, name),
                              UA_NODEID_NUMERIC(0, typeid), attr, NULL, NULL);
}

/**********************/
/* Create Namespace 0 */
/**********************/

void UA_Server_createNS0(UA_Server *server) {

    /*********************************/
    /* Bootstrap reference hierarchy */
    /*********************************/

    /* Bootstrap References and HasSubtype */
    UA_ReferenceTypeAttributes references_attr;
    UA_ReferenceTypeAttributes_init(&references_attr);
    references_attr.displayName = UA_LOCALIZEDTEXT("en_US", "References");
    references_attr.isAbstract = true;
    references_attr.symmetric = true;
    references_attr.inverseName = UA_LOCALIZEDTEXT("en_US", "References");
    UA_Server_addReferenceTypeNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_REFERENCES),
                                         UA_QUALIFIEDNAME(0, "References"), references_attr, NULL);

    UA_ReferenceTypeAttributes hassubtype_attr;
    UA_ReferenceTypeAttributes_init(&hassubtype_attr);
    hassubtype_attr.displayName = UA_LOCALIZEDTEXT("en_US", "HasSubtype");
    hassubtype_attr.isAbstract = false;
    hassubtype_attr.symmetric = false;
    hassubtype_attr.inverseName = UA_LOCALIZEDTEXT("en_US", "HasSupertype");
    UA_Server_addReferenceTypeNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_HASSUBTYPE),
                                         UA_QUALIFIEDNAME(0, "HasSubtype"), hassubtype_attr, NULL);

    addReferenceTypeNode(server, "HierarchicalReferences", NULL,
                         UA_NS0ID_HIERARCHICALREFERENCES,
                         true, false, UA_NS0ID_REFERENCES);

    addReferenceTypeNode(server, "NonHierarchicalReferences", NULL,
                         UA_NS0ID_NONHIERARCHICALREFERENCES,
                         true, false, UA_NS0ID_REFERENCES);

    addReferenceTypeNode(server, "HasChild", NULL, UA_NS0ID_HASCHILD,
                         true, false, UA_NS0ID_HIERARCHICALREFERENCES);

    addReferenceTypeNode(server, "Organizes", "OrganizedBy", UA_NS0ID_ORGANIZES,
                         false, false, UA_NS0ID_HIERARCHICALREFERENCES);

    addReferenceTypeNode(server, "HasEventSource", "EventSourceOf", UA_NS0ID_HASEVENTSOURCE,
                         false, false, UA_NS0ID_HIERARCHICALREFERENCES);

    addReferenceTypeNode(server, "HasModellingRule", "ModellingRuleOf", UA_NS0ID_HASMODELLINGRULE,
                         false, false, UA_NS0ID_NONHIERARCHICALREFERENCES);

    addReferenceTypeNode(server, "HasEncoding", "EncodingOf", UA_NS0ID_HASENCODING,
                         false, false, UA_NS0ID_NONHIERARCHICALREFERENCES);

    addReferenceTypeNode(server, "HasDescription", "DescriptionOf", UA_NS0ID_HASDESCRIPTION,
                         false, false, UA_NS0ID_NONHIERARCHICALREFERENCES);

    addReferenceTypeNode(server, "HasTypeDefinition", "TypeDefinitionOf", UA_NS0ID_HASTYPEDEFINITION,
                         false, false, UA_NS0ID_NONHIERARCHICALREFERENCES);

    addReferenceTypeNode(server, "GeneratesEvent", "GeneratedBy", UA_NS0ID_GENERATESEVENT,
                         false, false, UA_NS0ID_NONHIERARCHICALREFERENCES);

    addReferenceTypeNode(server, "Aggregates", "AggregatedBy", UA_NS0ID_AGGREGATES,
                         false, false, UA_NS0ID_HASCHILD);

    /* Complete bootstrap of HasSubtype */
    addReferenceInternal(server, UA_NS0ID_HASCHILD, UA_NS0ID_HASSUBTYPE,
                         UA_NS0ID_HASSUBTYPE, true);

    addReferenceTypeNode(server, "HasProperty", "PropertyOf", UA_NS0ID_HASPROPERTY,
                         false, false, UA_NS0ID_AGGREGATES);

    addReferenceTypeNode(server, "HasComponent", "ComponentOf", UA_NS0ID_HASCOMPONENT,
                         false, false, UA_NS0ID_AGGREGATES);

    addReferenceTypeNode(server, "HasNotifier", "NotifierOf", UA_NS0ID_HASNOTIFIER,
                         false, false, UA_NS0ID_HASEVENTSOURCE);

    addReferenceTypeNode(server, "HasOrderedComponent", "OrderedComponentOf",
                         UA_NS0ID_HASORDEREDCOMPONENT, false, false, UA_NS0ID_HASCOMPONENT);

    /**************/
    /* Data Types */
    /**************/

    /* Bootstrap BaseDataType */
    UA_DataTypeAttributes basedatatype_attr;
    UA_DataTypeAttributes_init(&basedatatype_attr);
    basedatatype_attr.displayName = UA_LOCALIZEDTEXT("en_US", "BaseDataType");
    basedatatype_attr.isAbstract = true;
    UA_Server_addDataTypeNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_BASEDATATYPE),
                                    UA_QUALIFIEDNAME(0, "BaseDataType"), basedatatype_attr, NULL);

    addDataTypeNode(server, "Boolean", UA_NS0ID_BOOLEAN, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "Number", UA_NS0ID_NUMBER, true, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "Float", UA_NS0ID_FLOAT, false, UA_NS0ID_NUMBER);
    addDataTypeNode(server, "Double", UA_NS0ID_DOUBLE, false, UA_NS0ID_NUMBER);
    addDataTypeNode(server, "Integer", UA_NS0ID_INTEGER, true, UA_NS0ID_NUMBER);
    addDataTypeNode(server, "SByte", UA_NS0ID_SBYTE, false, UA_NS0ID_INTEGER);
    addDataTypeNode(server, "Int16", UA_NS0ID_INT16, false, UA_NS0ID_INTEGER);
    addDataTypeNode(server, "Int32", UA_NS0ID_INT32, false, UA_NS0ID_INTEGER);
    addDataTypeNode(server, "Int64", UA_NS0ID_INT64, false, UA_NS0ID_INTEGER);
    addDataTypeNode(server, "UInteger", UA_NS0ID_UINTEGER, true, UA_NS0ID_INTEGER);
    addDataTypeNode(server, "Byte", UA_NS0ID_BYTE, false, UA_NS0ID_UINTEGER);
    addDataTypeNode(server, "UInt16", UA_NS0ID_UINT16, false, UA_NS0ID_UINTEGER);
    addDataTypeNode(server, "UInt32", UA_NS0ID_UINT32, false, UA_NS0ID_UINTEGER);
    addDataTypeNode(server, "UInt64", UA_NS0ID_UINT64, false, UA_NS0ID_UINTEGER);
    addDataTypeNode(server, "String", UA_NS0ID_STRING, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "DateTime", UA_NS0ID_DATETIME, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "Guid", UA_NS0ID_GUID, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "ByteString", UA_NS0ID_BYTESTRING, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "XmlElement", UA_NS0ID_XMLELEMENT, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "NodeId", UA_NS0ID_NODEID, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "ExpandedNodeId", UA_NS0ID_EXPANDEDNODEID, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "StatusCode", UA_NS0ID_STATUSCODE, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "QualifiedName", UA_NS0ID_QUALIFIEDNAME, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "LocalizedText", UA_NS0ID_LOCALIZEDTEXT, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "Structure", UA_NS0ID_STRUCTURE, true, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "ServerStatusDataType", UA_NS0ID_SERVERSTATUSDATATYPE, false, UA_NS0ID_STRUCTURE);
    addDataTypeNode(server, "BuildInfo", UA_NS0ID_BUILDINFO, false, UA_NS0ID_STRUCTURE);
    addDataTypeNode(server, "DataValue", UA_NS0ID_DATAVALUE, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "DiagnosticInfo", UA_NS0ID_DIAGNOSTICINFO, false, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "Enumeration", UA_NS0ID_ENUMERATION, true, UA_NS0ID_BASEDATATYPE);
    addDataTypeNode(server, "ServerState", UA_NS0ID_SERVERSTATE, false, UA_NS0ID_ENUMERATION);

    /*****************/
    /* VariableTypes */
    /*****************/

    /* Bootstrap BaseVariableType */
    UA_VariableTypeAttributes basevar_attr;
    UA_VariableTypeAttributes_init(&basevar_attr);
    basevar_attr.displayName = UA_LOCALIZEDTEXT("en_US", "BaseVariableType");
    basevar_attr.isAbstract = true;
    basevar_attr.valueRank = -2;
    basevar_attr.dataType = UA_NODEID_NUMERIC(0, UA_NS0ID_BASEDATATYPE);
    UA_Server_addVariableTypeNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_BASEVARIABLETYPE),
                                        UA_QUALIFIEDNAME(0, "BaseVariableType"), basevar_attr, NULL);

    addVariableTypeNode(server, "BaseDataVariableType", UA_NS0ID_BASEDATAVARIABLETYPE,
                        false, -2, UA_NS0ID_BASEDATATYPE, NULL, UA_NS0ID_BASEVARIABLETYPE);

    addVariableTypeNode(server, "PropertyType", UA_NS0ID_PROPERTYTYPE,
                        false, -2, UA_NS0ID_BASEDATATYPE, NULL, UA_NS0ID_BASEVARIABLETYPE);

    addVariableTypeNode(server, "BuildInfoType", UA_NS0ID_BUILDINFOTYPE,
                        false, -1, UA_NS0ID_BUILDINFO, &UA_TYPES[UA_TYPES_BUILDINFO],
                        UA_NS0ID_BASEDATAVARIABLETYPE);

    addVariableTypeNode(server, "ServerStatusType", UA_NS0ID_SERVERSTATUSTYPE,
                        false, -1, UA_NS0ID_SERVERSTATUSDATATYPE, &UA_TYPES[UA_TYPES_SERVERSTATUSDATATYPE],
                        UA_NS0ID_BASEDATAVARIABLETYPE);

    /***************/
    /* ObjectTypes */
    /***************/

    /* Bootstrap BaseObjectType */
    UA_ObjectTypeAttributes baseobj_attr;
    UA_ObjectTypeAttributes_init(&baseobj_attr);
    baseobj_attr.displayName = UA_LOCALIZEDTEXT("en_US", "BaseObjectType");
    UA_Server_addObjectTypeNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_BASEOBJECTTYPE),
                                      UA_QUALIFIEDNAME(0, "BaseObjectType"), baseobj_attr, NULL);

    addObjectTypeNode(server, "FolderType", UA_NS0ID_FOLDERTYPE,
                      false, UA_NS0ID_BASEOBJECTTYPE);

    addObjectTypeNode(server, "ServerType", UA_NS0ID_SERVERTYPE,
                      false, UA_NS0ID_BASEOBJECTTYPE);

    addObjectTypeNode(server, "ServerDiagnosticsType", UA_NS0ID_SERVERDIAGNOSTICSTYPE,
                      false,  UA_NS0ID_BASEOBJECTTYPE);

    addObjectTypeNode(server, "ServerCapatilitiesType", UA_NS0ID_SERVERCAPABILITIESTYPE,
                      false, UA_NS0ID_BASEOBJECTTYPE);

    /******************/
    /* Root and below */
    /******************/

    UA_ObjectAttributes root_attr;
    UA_ObjectAttributes_init(&root_attr);
    root_attr.displayName = UA_LOCALIZEDTEXT("en_US", "Root");
    UA_Server_addObjectNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_ROOTFOLDER),
                                  UA_QUALIFIEDNAME(0, "Root"), root_attr, NULL);
    addReferenceInternal(server, UA_NS0ID_ROOTFOLDER, UA_NS0ID_HASTYPEDEFINITION,
                         UA_NS0ID_FOLDERTYPE, true);

    addObjectNode(server, "Objects", UA_NS0ID_OBJECTSFOLDER, UA_NS0ID_ROOTFOLDER,
                  UA_NS0ID_ORGANIZES, UA_NS0ID_FOLDERTYPE);

    addObjectNode(server, "Types", UA_NS0ID_TYPESFOLDER, UA_NS0ID_ROOTFOLDER,
                  UA_NS0ID_ORGANIZES, UA_NS0ID_FOLDERTYPE);

    addObjectNode(server, "ReferenceTypes", UA_NS0ID_REFERENCETYPESFOLDER, UA_NS0ID_TYPESFOLDER,
                  UA_NS0ID_ORGANIZES, UA_NS0ID_FOLDERTYPE);
    addReferenceInternal(server, UA_NS0ID_REFERENCETYPESFOLDER, UA_NS0ID_ORGANIZES,
                         UA_NS0ID_REFERENCES, true);

    addObjectNode(server, "DataTypes", UA_NS0ID_DATATYPESFOLDER, UA_NS0ID_TYPESFOLDER,
                  UA_NS0ID_ORGANIZES, UA_NS0ID_FOLDERTYPE);
    addReferenceInternal(server, UA_NS0ID_DATATYPESFOLDER, UA_NS0ID_ORGANIZES,
                         UA_NS0ID_BASEDATATYPE, true);

    addObjectNode(server, "VariableTypes", UA_NS0ID_VARIABLETYPESFOLDER, UA_NS0ID_TYPESFOLDER,
                  UA_NS0ID_ORGANIZES, UA_NS0ID_FOLDERTYPE);
    addReferenceInternal(server, UA_NS0ID_VARIABLETYPESFOLDER, UA_NS0ID_ORGANIZES,
                         UA_NS0ID_BASEVARIABLETYPE, true);

    addObjectNode(server, "ObjectTypes", UA_NS0ID_OBJECTTYPESFOLDER, UA_NS0ID_TYPESFOLDER,
                  UA_NS0ID_ORGANIZES, UA_NS0ID_FOLDERTYPE);
    addReferenceInternal(server, UA_NS0ID_OBJECTTYPESFOLDER, UA_NS0ID_ORGANIZES,
                         UA_NS0ID_BASEOBJECTTYPE, true);

    addObjectNode(server, "EventTypes", UA_NS0ID_EVENTTYPESFOLDER, UA_NS0ID_TYPESFOLDER,
                  UA_NS0ID_ORGANIZES, UA_NS0ID_FOLDERTYPE);

    addObjectNode(server, "Views", UA_NS0ID_VIEWSFOLDER, UA_NS0ID_ROOTFOLDER,
                  UA_NS0ID_ORGANIZES, UA_NS0ID_FOLDERTYPE);

    /*********************/
    /* The Server Object */
    /*********************/

    UA_Variant var; /* Is used for all variable-content. UA_Variant_set...
                       resets the variant internally */

    /* Begin Server object */ 
    UA_ObjectAttributes server_attr;
    UA_ObjectAttributes_init(&server_attr);
    server_attr.displayName = UA_LOCALIZEDTEXT("en_US", "Server");
    UA_Server_addObjectNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER),
                                  UA_QUALIFIEDNAME(0, "Server"), server_attr, NULL);
    
    /* Server-NamespaceArray */
    UA_VariableAttributes nsarray_attr;
    UA_VariableAttributes_init(&nsarray_attr);
    nsarray_attr.displayName = UA_LOCALIZEDTEXT("en_US", "NamespaceArray");
    nsarray_attr.valueRank = 1;
    nsarray_attr.minimumSamplingInterval = 50.0;
    nsarray_attr.dataType = UA_TYPES[UA_TYPES_STRING].typeId;
    nsarray_attr.accessLevel = UA_ACCESSLEVELMASK_READ | UA_ACCESSLEVELMASK_WRITE;
    UA_Server_addVariableNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_NAMESPACEARRAY),
                                    UA_QUALIFIEDNAME(0, "NamespaceArray"), nsarray_attr, NULL);
    UA_DataSource nsarray_datasource =  {.handle = server, .read = readNamespaces,
                                         .write = writeNamespaces};
    UA_Server_setVariableNode_dataSource(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_NAMESPACEARRAY),
                                         nsarray_datasource);
    UA_Server_addNode_finish(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_NAMESPACEARRAY),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_HASPROPERTY),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_PROPERTYTYPE), NULL);

    UA_Variant_setArray(&var, &server->config.applicationDescription.applicationUri, 1,
                        &UA_TYPES[UA_TYPES_STRING]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERARRAY, "ServerArray", 1, &UA_TYPES[UA_TYPES_STRING].typeId,
                    &var, UA_NS0ID_SERVER, UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    /* Begin ServerCapabilities */
    UA_ObjectAttributes servercap_attr;
    UA_ObjectAttributes_init(&servercap_attr);
    servercap_attr.displayName = UA_LOCALIZEDTEXT("en_US", "ServerCapabilities");
    UA_Server_addObjectNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERCAPABILITIES),
                                  UA_QUALIFIEDNAME(0, "ServerCapabilities"), servercap_attr, NULL);
    
    UA_String enLocale = UA_STRING("en");
    UA_Variant_setArray(&var, &enLocale, 1, &UA_TYPES[UA_TYPES_STRING]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERCAPABILITIES_LOCALEIDARRAY, "LocaleIdArray",
                    1, &UA_TYPES[UA_TYPES_STRING].typeId, &var, UA_NS0ID_SERVER_SERVERCAPABILITIES,
                    UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    UA_UInt16 maxBrowseContinuationPoints = 0; /* no restriction */
    UA_Variant_setScalar(&var, &maxBrowseContinuationPoints, &UA_TYPES[UA_TYPES_UINT16]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERCAPABILITIES_MAXBROWSECONTINUATIONPOINTS,
                    "MaxBrowseContinuationPoints", -1, &UA_TYPES[UA_TYPES_UINT16].typeId,
                    &var, UA_NS0ID_SERVER_SERVERCAPABILITIES, UA_NS0ID_HASPROPERTY,
                    UA_NS0ID_PROPERTYTYPE);

    /* ServerProfileArray */
#define MAX_PROFILEARRAY 4 /* increase when necesssary... */
    UA_String profileArray[MAX_PROFILEARRAY];
    UA_UInt16 profileArraySize = 0;
#define ADDPROFILEARRAY(x) profileArray[profileArraySize++] = UA_STRING(x)
    ADDPROFILEARRAY("http://opcfoundation.org/UA-Profile/Server/NanoEmbeddedDevice");
#ifdef UA_ENABLE_SERVICESET_NODEMANAGEMENT
    ADDPROFILEARRAY("http://opcfoundation.org/UA-Profile/Server/NodeManagement");
#endif
#ifdef UA_ENABLE_SERVICESET_METHOD
    ADDPROFILEARRAY("http://opcfoundation.org/UA-Profile/Server/Methods");
#endif
#ifdef UA_ENABLE_SUBSCRIPTIONS
    ADDPROFILEARRAY("http://opcfoundation.org/UA-Profile/Server/EmbeddedDataChangeSubscription");
#endif
    UA_Variant_setArray(&var, &profileArray, profileArraySize, &UA_TYPES[UA_TYPES_STRING]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERCAPABILITIES_SERVERPROFILEARRAY, "ServerProfileArray",
                    1, &UA_TYPES[UA_TYPES_STRING].typeId, &var, UA_NS0ID_SERVER_SERVERCAPABILITIES,
                    UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    /* TODO: dataType = UA_TYPES[UA_TYPES_SIGNEDSOFTWARECERTIFICATE].typeId; */
    UA_Variant_setArray(&var, NULL, 0, &UA_TYPES[UA_TYPES_SIGNEDSOFTWARECERTIFICATE]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERCAPABILITIES_SOFTWARECERTIFICATES, "SoftwareCertificates",
                    1, &UA_TYPES[UA_TYPES_VARIANT].typeId, &var, UA_NS0ID_SERVER_SERVERCAPABILITIES,
                    UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    UA_UInt16 maxQCP = 0;
    UA_Variant_setScalar(&var, &maxQCP, &UA_TYPES[UA_TYPES_UINT16]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERCAPABILITIES_MAXQUERYCONTINUATIONPOINTS,
                    "MaxQueryContinuationPoints", -1, &UA_TYPES[UA_TYPES_UINT16].typeId, &var,
                    UA_NS0ID_SERVER_SERVERCAPABILITIES, UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    UA_UInt16 maxHCP = 0;
    UA_Variant_setScalar(&var, &maxHCP, &UA_TYPES[UA_TYPES_UINT16]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERCAPABILITIES_MAXHISTORYCONTINUATIONPOINTS,
                    "MaxHistoryContinuationPoints", -1, &UA_TYPES[UA_TYPES_UINT16].typeId,
                    &var, UA_NS0ID_SERVER_SERVERCAPABILITIES, UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    UA_Double minSSR = 0.0;
    UA_Variant_setScalar(&var, &minSSR, &UA_TYPES[UA_TYPES_DOUBLE]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERCAPABILITIES_MINSUPPORTEDSAMPLERATE,
                    "MinSupportedSampleRate", -1, &UA_TYPES[UA_TYPES_DOUBLE].typeId, &var,
                    UA_NS0ID_SERVER_SERVERCAPABILITIES, UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    addObjectNode(server, "ModellingRules", UA_NS0ID_SERVER_SERVERCAPABILITIES_MODELLINGRULES,
                  UA_NS0ID_SERVER_SERVERCAPABILITIES, UA_NS0ID_HASPROPERTY, UA_NS0ID_FOLDERTYPE);

    addObjectNode(server, "AggregateFunctions", UA_NS0ID_SERVER_SERVERCAPABILITIES_AGGREGATEFUNCTIONS,
                  UA_NS0ID_SERVER_SERVERCAPABILITIES, UA_NS0ID_HASPROPERTY, UA_NS0ID_FOLDERTYPE);

    /* Finish ServerCapabilities */
    UA_Server_addNode_finish(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERCAPABILITIES),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_HASCOMPONENT),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_SERVERCAPABILITIESTYPE), NULL);

    /* Begin ServerDiagnostics */
    UA_ObjectAttributes serverdiag_attr;
    UA_ObjectAttributes_init(&serverdiag_attr);
    serverdiag_attr.displayName = UA_LOCALIZEDTEXT("en_US", "ServerDiagnostics");
    UA_Server_addObjectNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERDIAGNOSTICS),
                                  UA_QUALIFIEDNAME(0, "ServerDiagnostics"), serverdiag_attr, NULL);
    
    UA_Boolean enabledFlag = false;
    UA_Variant_setScalar(&var, &enabledFlag, &UA_TYPES[UA_TYPES_BOOLEAN]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERDIAGNOSTICS_ENABLEDFLAG, "EnabledFlag", -1,
                    &UA_TYPES[UA_TYPES_BOOLEAN].typeId, &var, UA_NS0ID_SERVER_SERVERDIAGNOSTICS,
                    UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    /* Finish ServerDiagnostics */
    UA_Server_addNode_finish(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERDIAGNOSTICS),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_HASCOMPONENT),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_SERVERDIAGNOSTICSTYPE), NULL);

    // TODO: Begin Serverstatus
    UA_VariableAttributes serverstatus_attr;
    UA_VariableAttributes_init(&serverstatus_attr);
    serverstatus_attr.displayName = UA_LOCALIZEDTEXT("en_US", "ServerStatus");
    serverstatus_attr.valueRank = -1;
    serverstatus_attr.dataType = UA_NODEID_NUMERIC(0, UA_NS0ID_SERVERSTATUSDATATYPE);
    UA_Server_addVariableNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERSTATUS),
                                    UA_QUALIFIEDNAME(0, "ServerStatus"), serverstatus_attr, NULL);
    UA_DataSource statusDS = {.handle = server, .read = readStatus, .write = NULL};
    UA_Server_setVariableNode_dataSource(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERSTATUS),
                                         statusDS);
    UA_Server_addNode_finish(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERSTATUS),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_HASCOMPONENT),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_BASEDATAVARIABLETYPE), NULL);

    UA_Variant_setScalar(&var, &server->startTime, &UA_TYPES[UA_TYPES_DATETIME]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_STARTTIME, "StartTime", -1,
                    &UA_TYPES[UA_TYPES_DATETIME].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    /* TODO: UTC Time Type */
    const UA_NodeId currentTimeId = UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERSTATUS_CURRENTTIME);
    UA_VariableAttributes currenttime_attr;
    UA_VariableAttributes_init(&currenttime_attr);
    currenttime_attr.displayName = UA_LOCALIZEDTEXT("en_US", "CurrentTime");
    currenttime_attr.valueRank = -1;
    currenttime_attr.dataType = UA_TYPES[UA_TYPES_DATETIME].typeId;
    UA_Server_addVariableNode_begin(server, currentTimeId, UA_QUALIFIEDNAME(0, "CurrentTime"),
                                    currenttime_attr, NULL);
    UA_DataSource currentDS = {.handle = NULL, .read = readCurrentTime, .write = NULL};
    UA_Server_setVariableNode_dataSource(server, currentTimeId, currentDS);
    UA_Server_addNode_finish(server, currentTimeId,
                             UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERSTATUS),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_HASCOMPONENT),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_BASEDATAVARIABLETYPE), NULL);

    UA_ServerState state = UA_SERVERSTATE_RUNNING;
    UA_Variant_setScalar(&var, &state, &UA_TYPES[UA_TYPES_SERVERSTATE]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_STATE, "State", -1,
                    &UA_TYPES[UA_TYPES_SERVERSTATE].typeId, &var,
                    UA_NS0ID_SERVER_SERVERSTATUS, UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    UA_Variant_setScalar(&var, &server->config.buildInfo, &UA_TYPES[UA_TYPES_BUILDINFO]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO, "BuildInfo", -1,
                    &UA_TYPES[UA_TYPES_BUILDINFO].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BUILDINFOTYPE);

    UA_Variant_setScalar(&var, &server->config.buildInfo.productUri, &UA_TYPES[UA_TYPES_STRING]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO_PRODUCTURI, "ProductUri", -1,
                    &UA_TYPES[UA_TYPES_STRING].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    UA_Variant_setScalar(&var, &server->config.buildInfo.manufacturerName, &UA_TYPES[UA_TYPES_STRING]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO_MANUFACTURERNAME, "ManufacturerName", -1,
                    &UA_TYPES[UA_TYPES_STRING].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    UA_Variant_setScalar(&var, &server->config.buildInfo.productName, &UA_TYPES[UA_TYPES_STRING]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO_PRODUCTNAME, "ProductName", -1,
                    &UA_TYPES[UA_TYPES_STRING].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    UA_Variant_setScalar(&var, &server->config.buildInfo.softwareVersion, &UA_TYPES[UA_TYPES_STRING]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO_SOFTWAREVERSION, "SoftwareVersion", -1,
                    &UA_TYPES[UA_TYPES_STRING].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    UA_Variant_setScalar(&var, &server->config.buildInfo.buildNumber, &UA_TYPES[UA_TYPES_STRING]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO_BUILDNUMBER, "BuildNumber", -1,
                    &UA_TYPES[UA_TYPES_STRING].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    UA_Variant_setScalar(&var, &server->config.buildInfo.buildDate, &UA_TYPES[UA_TYPES_DATETIME]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO_BUILDDATE, "BuildDate", -1,
                    &UA_TYPES[UA_TYPES_DATETIME].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS_BUILDINFO,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    /* Finish BuildInfo */

    UA_UInt32 secondsTillShutdown = 0;
    UA_Variant_setScalar(&var, &secondsTillShutdown, &UA_TYPES[UA_TYPES_UINT32]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_SECONDSTILLSHUTDOWN, "SecondsTillShutdown", -1,
                    &UA_TYPES[UA_TYPES_UINT32].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);

    UA_LocalizedText shutdownReason;
    UA_LocalizedText_init(&shutdownReason);
    UA_Variant_setScalar(&var, &shutdownReason, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERSTATUS_SHUTDOWNREASON, "ShutdownReason", -1,
                    &UA_TYPES[UA_TYPES_LOCALIZEDTEXT].typeId, &var, UA_NS0ID_SERVER_SERVERSTATUS,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEDATAVARIABLETYPE);
    
    /* Finish ServerStatus */

    UA_Byte serviceLevel = 255;
    UA_Variant_setScalar(&var, &serviceLevel, &UA_TYPES[UA_TYPES_BYTE]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVICELEVEL, "ServiceLevel", -1,
                    &UA_TYPES[UA_TYPES_BYTE].typeId, &var, UA_NS0ID_SERVER,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_PROPERTYTYPE);

    UA_Boolean auditing = false;
    UA_Variant_setScalar(&var, &auditing, &UA_TYPES[UA_TYPES_BOOLEAN]);
    addVariableNode(server, UA_NS0ID_SERVER_AUDITING, "Auditing", -1,
                    &UA_TYPES[UA_TYPES_BOOLEAN].typeId, &var, UA_NS0ID_SERVER,
                    UA_NS0ID_HASCOMPONENT, UA_NS0ID_PROPERTYTYPE);

    addObjectNode(server, "VendorServerInfo", UA_NS0ID_SERVER_VENDORSERVERINFO, UA_NS0ID_SERVER,
                  UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEOBJECTTYPE);

    addObjectNode(server, "ServerRedundancy", UA_NS0ID_SERVER_SERVERREDUNDANCY, UA_NS0ID_SERVER,
                  UA_NS0ID_HASCOMPONENT, UA_NS0ID_BASEOBJECTTYPE);

    UA_Int32 rS = 0; /* TODO: use enum type */
    UA_Variant_setScalar(&var, &rS, &UA_TYPES[UA_TYPES_INT32]);
    addVariableNode(server, UA_NS0ID_SERVER_SERVERREDUNDANCY_REDUNDANCYSUPPORT, "RedundancySupport",
                    -1, &UA_TYPES[UA_TYPES_VARIANT].typeId, &var,
                    UA_NS0ID_SERVER_SERVERREDUNDANCY, UA_NS0ID_HASPROPERTY,
                    UA_NS0ID_PROPERTYTYPE);

#if defined(UA_ENABLE_METHODCALLS) && defined(UA_ENABLE_SUBSCRIPTIONS)
    /* Add method node */
    UA_MethodAttributes addmethodattributes;
    UA_MethodAttributes_init(&addmethodattributes);
    addmethodattributes.displayName = UA_LOCALIZEDTEXT("", "GetMonitoredItems");
    addmethodattributes.executable = true;
    addmethodattributes.userExecutable = true;
    UA_Server_addMethodNode_begin(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_GETMONITOREDITEMS),
                                  UA_QUALIFIEDNAME(0, "GetMonitoredItems"),
                                  addmethodattributes,
                                  readMonitoredItems, /* callback of the method node */
                                  NULL, /* handle passed with the callback */
                                  NULL);

    /* Add the arguments manually to get the nodeids right */
    UA_Argument inputArguments;
    UA_Argument_init(&inputArguments);
    inputArguments.dataType = UA_TYPES[UA_TYPES_UINT32].typeId;
    inputArguments.name = UA_STRING("SubscriptionId");
    inputArguments.valueRank = -1; /* scalar argument */
    UA_Variant vInputArgs;
    UA_Variant_setArray(&vInputArgs, &inputArguments, 1, &UA_TYPES[UA_TYPES_ARGUMENT]);
    addVariableNode(server, UA_NS0ID_SERVER_GETMONITOREDITEMS_INPUTARGUMENTS,
                    "InputArguments", 1, &UA_TYPES[UA_TYPES_ARGUMENT].typeId, &vInputArgs,
                    UA_NS0ID_SERVER_GETMONITOREDITEMS, UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    UA_Argument outputArguments[2];
    UA_Argument_init(&outputArguments[0]);
    outputArguments[0].dataType = UA_TYPES[UA_TYPES_UINT32].typeId;
    outputArguments[0].name = UA_STRING("ServerHandles");
    outputArguments[0].valueRank = 1;
    UA_Argument_init(&outputArguments[1]);
    outputArguments[1].dataType = UA_TYPES[UA_TYPES_UINT32].typeId;
    outputArguments[1].name = UA_STRING("ClientHandles");
    outputArguments[1].valueRank = 1;
    UA_Variant vOutputArgs;
    UA_Variant_setArray(&vOutputArgs, &outputArguments, 2, &UA_TYPES[UA_TYPES_ARGUMENT]);
    addVariableNode(server, UA_NS0ID_SERVER_GETMONITOREDITEMS_OUTPUTARGUMENTS,
                    "OutputArguments", 1, &UA_TYPES[UA_TYPES_ARGUMENT].typeId, &vOutputArgs,
                    UA_NS0ID_SERVER_GETMONITOREDITEMS, UA_NS0ID_HASPROPERTY, UA_NS0ID_PROPERTYTYPE);

    /* Finish method node */
    UA_Server_addMethodNode_finish(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_GETMONITOREDITEMS),
                                   UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER),
                                   UA_NODEID_NUMERIC(0, UA_NS0ID_HASCOMPONENT),
                                   0, NULL, 0, NULL);
#endif /* defined(UA_ENABLE_METHODCALLS) && defined(UA_ENABLE_SUBSCRIPTIONS) */

    /* Finish adding the server object */
    UA_Server_addNode_finish(server, UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES),
                             UA_NODEID_NUMERIC(0, UA_NS0ID_SERVERTYPE), NULL);
}

#endif /* UA_ENABLE_GENERATE_NAMESPACE0 */