static UA_StatusCode eventSetup(UA_NodeId *eventNodeId) {
UA_StatusCode retval;
retval = UA_Server_createEvent(server, eventType, eventNodeId);
ck_assert_uint_eq(retval, UA_STATUSCODE_GOOD);
// add a severity to the event
UA_Variant value;
UA_RelativePathElement rpe;
UA_RelativePathElement_init(&rpe);
rpe.referenceTypeId = UA_NODEID_NUMERIC(0, UA_NS0ID_HASPROPERTY);
rpe.isInverse = false;
rpe.includeSubtypes = false;
UA_BrowsePath bp;
UA_BrowsePath_init(&bp);
bp.startingNode = *eventNodeId;
bp.relativePath.elementsSize = 1;
bp.relativePath.elements = &rpe;
rpe.targetName = UA_QUALIFIEDNAME(0, "Severity");
UA_BrowsePathResult bpr = UA_Server_translateBrowsePathToNodeIds(server, &bp);
// number with no special meaning
UA_UInt16 eventSeverity = 1000;
UA_Variant_setScalar(&value, &eventSeverity, &UA_TYPES[UA_TYPES_UINT16]);
UA_Server_writeValue(server, bpr.targets[0].targetId.nodeId, value);
UA_BrowsePathResult_deleteMembers(&bpr);
//add a message to the event
rpe.targetName = UA_QUALIFIEDNAME(0, "Message");
bpr = UA_Server_translateBrowsePathToNodeIds(server, &bp);
UA_LocalizedText message = UA_LOCALIZEDTEXT("en-US", "Generated Event");
UA_Variant_setScalar(&value, &message, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]);
UA_Server_writeValue(server, bpr.targets[0].targetId.nodeId, value);
UA_BrowsePathResult_deleteMembers(&bpr);
return retval;
}
static UA_NodeId
findSingleChildNode(UA_QualifiedName targetName,
UA_NodeId referenceTypeId, UA_NodeId startingNode){
UA_NodeId resultNodeId;
UA_RelativePathElement rpe;
UA_RelativePathElement_init(&rpe);
rpe.referenceTypeId = referenceTypeId;
rpe.isInverse = false;
rpe.includeSubtypes = false;
rpe.targetName = targetName;
UA_BrowsePath bp;
UA_BrowsePath_init(&bp);
bp.startingNode = startingNode;
bp.relativePath.elementsSize = 1;
bp.relativePath.elements = &rpe;
UA_BrowsePathResult bpr =
UA_Server_translateBrowsePathToNodeIds(server, &bp);
if(bpr.statusCode != UA_STATUSCODE_GOOD ||
bpr.targetsSize < 1)
return UA_NODEID_NULL;
if(UA_NodeId_copy(&bpr.targets[0].targetId.nodeId, &resultNodeId) != UA_STATUSCODE_GOOD){
UA_BrowsePathResult_deleteMembers(&bpr);
return UA_NODEID_NULL;
}
UA_BrowsePathResult_deleteMembers(&bpr);
return resultNodeId;
}
/* finds the NodeId of a StateNumber child of a given node id */
static void findChildId(UA_NodeId stateId, UA_NodeId referenceType, const UA_QualifiedName targetName, UA_NodeId *result) {
UA_RelativePathElement rpe;
UA_RelativePathElement_init(&rpe);
rpe.referenceTypeId = referenceType;
rpe.isInverse = false;
rpe.includeSubtypes = false;
rpe.targetName = targetName;
UA_BrowsePath bp;
UA_BrowsePath_init(&bp);
bp.startingNode = stateId;
bp.relativePath.elementsSize = 1;
bp.relativePath.elements = &rpe; //clion complains but is ok
UA_BrowsePathResult bpr = UA_Server_translateBrowsePathToNodeIds(server, &bp);
ck_assert_uint_eq(bpr.statusCode, UA_STATUSCODE_GOOD);
UA_NodeId_copy(&bpr.targets[0].targetId.nodeId, result);
UA_BrowsePathResult_deleteMembers(&bpr);
}
/* When a change is detected, encoding contains the heap-allocated binary
* encoded value. The default for changed is false. */
static UA_StatusCode
detectValueChangeWithFilter(UA_Server *server, UA_MonitoredItem *mon, UA_DataValue *value,
UA_ByteString *encoding, UA_Boolean *changed) {
if(UA_DataType_isNumeric(value->value.type) &&
(mon->filter.dataChangeFilter.trigger == UA_DATACHANGETRIGGER_STATUSVALUE ||
mon->filter.dataChangeFilter.trigger == UA_DATACHANGETRIGGER_STATUSVALUETIMESTAMP)) {
if(mon->filter.dataChangeFilter.deadbandType == UA_DEADBANDTYPE_ABSOLUTE) {
if(!updateNeededForFilteredValue(&value->value, &mon->lastValue,
mon->filter.dataChangeFilter.deadbandValue))
return UA_STATUSCODE_GOOD;
}
#ifdef UA_ENABLE_DA
else if(mon->filter.dataChangeFilter.deadbandType == UA_DEADBANDTYPE_PERCENT) {
UA_QualifiedName qn = UA_QUALIFIEDNAME(0, "EURange");
UA_BrowsePathResult bpr = UA_Server_browseSimplifiedBrowsePath(server, mon->monitoredNodeId, 1, &qn);
if(bpr.statusCode != UA_STATUSCODE_GOOD || bpr.targetsSize < 1) { //if branch is not entried, property has been found
UA_BrowsePathResult_deleteMembers(&bpr);
return UA_STATUSCODE_GOOD;
}
const UA_VariableNode* node =
(const UA_VariableNode*) UA_Nodestore_getNode(server->nsCtx, &bpr.targets->targetId.nodeId);
UA_Range* euRange = (UA_Range*) node->value.data.value.value.data;
if(!updateNeededForFilteredPercentValue(&value->value, &mon->lastValue,
mon->filter.dataChangeFilter.deadbandValue, euRange)) {
if(!updateNeededForStatusCode(value, mon)) //when same value, but different status code is written
return UA_STATUSCODE_GOOD;
}
}
#endif
}
/* Stack-allocate some memory for the value encoding. We might heap-allocate
* more memory if needed. This is just enough for scalars and small
* structures. */
UA_STACKARRAY(UA_Byte, stackValueEncoding, UA_VALUENCODING_MAXSTACK);
UA_ByteString valueEncoding;
valueEncoding.data = stackValueEncoding;
valueEncoding.length = UA_VALUENCODING_MAXSTACK;
/* Encode the value */
UA_Byte *bufPos = valueEncoding.data;
const UA_Byte *bufEnd = &valueEncoding.data[valueEncoding.length];
UA_StatusCode retval = UA_encodeBinary(value, &UA_TYPES[UA_TYPES_DATAVALUE],
&bufPos, &bufEnd, NULL, NULL);
if(retval == UA_STATUSCODE_BADENCODINGERROR) {
size_t binsize = UA_calcSizeBinary(value, &UA_TYPES[UA_TYPES_DATAVALUE]);
if(binsize == 0)
return UA_STATUSCODE_BADENCODINGERROR;
if(binsize > UA_VALUENCODING_MAXSTACK) {
retval = UA_ByteString_allocBuffer(&valueEncoding, binsize);
if(retval == UA_STATUSCODE_GOOD) {
bufPos = valueEncoding.data;
bufEnd = &valueEncoding.data[valueEncoding.length];
retval = UA_encodeBinary(value, &UA_TYPES[UA_TYPES_DATAVALUE],
&bufPos, &bufEnd, NULL, NULL);
}
}
}
if(retval != UA_STATUSCODE_GOOD) {
if(valueEncoding.data != stackValueEncoding)
UA_ByteString_deleteMembers(&valueEncoding);
return retval;
}
/* Has the value changed? */
valueEncoding.length = (uintptr_t)bufPos - (uintptr_t)valueEncoding.data;
*changed = (!mon->lastSampledValue.data ||
!UA_String_equal(&valueEncoding, &mon->lastSampledValue));
/* No change */
if(!(*changed)) {
if(valueEncoding.data != stackValueEncoding)
UA_ByteString_deleteMembers(&valueEncoding);
return UA_STATUSCODE_GOOD;
}
/* Change detected. Copy encoding on the heap if necessary. */
if(valueEncoding.data == stackValueEncoding)
return UA_ByteString_copy(&valueEncoding, encoding);
*encoding = valueEncoding;
return UA_STATUSCODE_GOOD;
}
