static UA_StatusCode writeValueAttributeWithoutRange(UA_VariableNode *node, const UA_DataValue *value) { UA_DataValue new_value; UA_StatusCode retval = UA_DataValue_copy(value, &new_value); if(retval != UA_STATUSCODE_GOOD) return retval; UA_DataValue_deleteMembers(&node->value.data.value); node->value.data.value = new_value; return UA_STATUSCODE_GOOD; }
/** Reads a single attribute from a node in the nodestore. */ static void readValue(UA_Server *server, UA_TimestampsToReturn timestamps, const UA_ReadValueId *id, UA_DataValue *v) { if(id->dataEncoding.name.length >= 0){ if(memcmp(id->dataEncoding.name.data, "DefaultBinary", 13) != 0 && memcmp(id->dataEncoding.name.data, "DefaultXml", 10) != 0) { v->hasStatus = UA_TRUE; v->status = UA_STATUSCODE_BADDATAENCODINGINVALID; return; } } //index range for a non-value if(id->indexRange.length >= 0 && id->attributeId != UA_ATTRIBUTEID_VALUE){ v->hasStatus = UA_TRUE; v->status = UA_STATUSCODE_BADINDEXRANGENODATA; return; } UA_Node const *node = UA_NodeStore_get(server->nodestore, &(id->nodeId)); if(!node) { v->hasStatus = UA_TRUE; v->status = UA_STATUSCODE_BADNODEIDUNKNOWN; return; } UA_StatusCode retval = UA_STATUSCODE_GOOD; switch(id->attributeId) { case UA_ATTRIBUTEID_NODEID: v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &node->nodeId, &UA_TYPES[UA_TYPES_NODEID]); break; case UA_ATTRIBUTEID_NODECLASS: v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &node->nodeClass, &UA_TYPES[UA_TYPES_INT32]); break; case UA_ATTRIBUTEID_BROWSENAME: v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &node->browseName, &UA_TYPES[UA_TYPES_QUALIFIEDNAME]); break; case UA_ATTRIBUTEID_DISPLAYNAME: retval |= UA_Variant_setScalarCopy(&v->value, &node->displayName, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]); if(retval == UA_STATUSCODE_GOOD) v->hasValue = UA_TRUE; break; case UA_ATTRIBUTEID_DESCRIPTION: v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &node->description, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]); break; case UA_ATTRIBUTEID_WRITEMASK: v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &node->writeMask, &UA_TYPES[UA_TYPES_UINT32]); break; case UA_ATTRIBUTEID_USERWRITEMASK: v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &node->userWriteMask, &UA_TYPES[UA_TYPES_UINT32]); break; case UA_ATTRIBUTEID_ISABSTRACT: CHECK_NODECLASS(UA_NODECLASS_REFERENCETYPE | UA_NODECLASS_OBJECTTYPE | UA_NODECLASS_VARIABLETYPE | UA_NODECLASS_DATATYPE); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_ReferenceTypeNode *)node)->isAbstract, &UA_TYPES[UA_TYPES_BOOLEAN]); break; case UA_ATTRIBUTEID_SYMMETRIC: CHECK_NODECLASS(UA_NODECLASS_REFERENCETYPE); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_ReferenceTypeNode *)node)->symmetric, &UA_TYPES[UA_TYPES_BOOLEAN]); break; case UA_ATTRIBUTEID_INVERSENAME: CHECK_NODECLASS(UA_NODECLASS_REFERENCETYPE); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_ReferenceTypeNode *)node)->inverseName, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]); break; case UA_ATTRIBUTEID_CONTAINSNOLOOPS: CHECK_NODECLASS(UA_NODECLASS_VIEW); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_ViewNode *)node)->containsNoLoops, &UA_TYPES[UA_TYPES_BOOLEAN]); break; case UA_ATTRIBUTEID_EVENTNOTIFIER: CHECK_NODECLASS(UA_NODECLASS_VIEW | UA_NODECLASS_OBJECT); v->hasValue = UA_TRUE; if(node->nodeClass == UA_NODECLASS_VIEW){ retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_ViewNode *)node)->eventNotifier, &UA_TYPES[UA_TYPES_BYTE]); } else { retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_ObjectNode *)node)->eventNotifier, &UA_TYPES[UA_TYPES_BYTE]); } break; case UA_ATTRIBUTEID_VALUE: CHECK_NODECLASS(UA_NODECLASS_VARIABLE | UA_NODECLASS_VARIABLETYPE); { if(node->nodeClass != UA_NODECLASS_VARIABLE) { v->hasValue = UA_FALSE; handleSourceTimestamps(timestamps, v); } UA_Boolean hasRange = UA_FALSE; UA_NumericRange range; if(id->indexRange.length > 0) { retval = parse_numericrange(id->indexRange, &range); if(retval != UA_STATUSCODE_GOOD) break; hasRange = UA_TRUE; } const UA_VariableNode *vn = (const UA_VariableNode*)node; if(vn->valueSource == UA_VALUESOURCE_VARIANT) { if(hasRange) retval |= UA_Variant_copyRange(&vn->value.variant, &v->value, range); else retval |= UA_Variant_copy(&vn->value.variant, &v->value); if(retval == UA_STATUSCODE_GOOD) { v->hasValue = UA_TRUE; handleSourceTimestamps(timestamps, v); } } else { UA_DataValue val; UA_DataValue_init(&val); UA_Boolean sourceTimeStamp = (timestamps == UA_TIMESTAMPSTORETURN_SOURCE || timestamps == UA_TIMESTAMPSTORETURN_BOTH); retval |= vn->value.dataSource.read(vn->value.dataSource.handle, sourceTimeStamp, &val); if(retval == UA_STATUSCODE_GOOD) { retval |= UA_DataValue_copy(&val, v); // todo: selection of indexranges } vn->value.dataSource.release(vn->value.dataSource.handle, &val); } if(hasRange) UA_free(range.dimensions); } break; case UA_ATTRIBUTEID_DATATYPE: { CHECK_NODECLASS(UA_NODECLASS_VARIABLE | UA_NODECLASS_VARIABLETYPE); const UA_VariableNode *vn = (const UA_VariableNode*)node; if(vn->valueSource == UA_VALUESOURCE_VARIANT) retval = UA_Variant_setScalarCopy(&v->value, &vn->value.variant.type->typeId, &UA_TYPES[UA_TYPES_NODEID]); else { UA_DataValue val; UA_DataValue_init(&val); retval = vn->value.dataSource.read(vn->value.dataSource.handle, UA_FALSE, &val); if(retval != UA_STATUSCODE_GOOD) break; retval = UA_Variant_setScalarCopy(&v->value, &val.value.type->typeId, &UA_TYPES[UA_TYPES_NODEID]); vn->value.dataSource.release(vn->value.dataSource.handle, &val); } if(retval == UA_STATUSCODE_GOOD) v->hasValue = UA_TRUE; } break; case UA_ATTRIBUTEID_VALUERANK: CHECK_NODECLASS(UA_NODECLASS_VARIABLE | UA_NODECLASS_VARIABLETYPE); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_VariableTypeNode *)node)->valueRank, &UA_TYPES[UA_TYPES_INT32]); break; case UA_ATTRIBUTEID_ARRAYDIMENSIONS: CHECK_NODECLASS(UA_NODECLASS_VARIABLE | UA_NODECLASS_VARIABLETYPE); { const UA_VariableNode *vn = (const UA_VariableNode *)node; if(vn->valueSource == UA_VALUESOURCE_VARIANT) { retval = UA_Variant_setArrayCopy(&v->value, vn->value.variant.arrayDimensions, vn->value.variant.arrayDimensionsSize, &UA_TYPES[UA_TYPES_INT32]); if(retval == UA_STATUSCODE_GOOD) v->hasValue = UA_TRUE; } else { UA_DataValue val; UA_DataValue_init(&val); retval |= vn->value.dataSource.read(vn->value.dataSource.handle, UA_FALSE, &val); if(retval != UA_STATUSCODE_GOOD) break; if(!val.hasValue) retval = UA_STATUSCODE_BADNOTREADABLE; else retval = UA_Variant_setArrayCopy(&v->value, val.value.arrayDimensions, val.value.arrayDimensionsSize, &UA_TYPES[UA_TYPES_INT32]); vn->value.dataSource.release(vn->value.dataSource.handle, &val); } } break; case UA_ATTRIBUTEID_ACCESSLEVEL: CHECK_NODECLASS(UA_NODECLASS_VARIABLE); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_VariableNode *)node)->accessLevel, &UA_TYPES[UA_TYPES_BYTE]); break; case UA_ATTRIBUTEID_USERACCESSLEVEL: CHECK_NODECLASS(UA_NODECLASS_VARIABLE); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_VariableNode *)node)->userAccessLevel, &UA_TYPES[UA_TYPES_BYTE]); break; case UA_ATTRIBUTEID_MINIMUMSAMPLINGINTERVAL: CHECK_NODECLASS(UA_NODECLASS_VARIABLE); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_VariableNode *)node)->minimumSamplingInterval, &UA_TYPES[UA_TYPES_DOUBLE]); break; case UA_ATTRIBUTEID_HISTORIZING: CHECK_NODECLASS(UA_NODECLASS_VARIABLE); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_VariableNode *)node)->historizing, &UA_TYPES[UA_TYPES_BOOLEAN]); break; case UA_ATTRIBUTEID_EXECUTABLE: CHECK_NODECLASS(UA_NODECLASS_METHOD); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_MethodNode *)node)->executable, &UA_TYPES[UA_TYPES_BOOLEAN]); break; case UA_ATTRIBUTEID_USEREXECUTABLE: CHECK_NODECLASS(UA_NODECLASS_METHOD); v->hasValue = UA_TRUE; retval |= UA_Variant_setScalarCopy(&v->value, &((const UA_MethodNode *)node)->userExecutable, &UA_TYPES[UA_TYPES_BOOLEAN]); break; default: v->hasStatus = UA_TRUE; v->status = UA_STATUSCODE_BADATTRIBUTEIDINVALID; break; } UA_NodeStore_release(node); if(retval != UA_STATUSCODE_GOOD) { v->hasStatus = UA_TRUE; v->status = retval; } handleServerTimestamps(timestamps, v); }
/* movedValue returns whether the sample was moved to the notification. The * default is false. */ static UA_StatusCode sampleCallbackWithValue(UA_Server *server, UA_Session *session, UA_Subscription *sub, UA_MonitoredItem *mon, UA_DataValue *value, UA_Boolean *movedValue) { UA_assert(mon->attributeId != UA_ATTRIBUTEID_EVENTNOTIFIER); /* Contains heap-allocated binary encoding of the value if a change was detected */ UA_ByteString binValueEncoding = UA_BYTESTRING_NULL; /* Has the value changed? Allocates memory in binValueEncoding if necessary. * value is edited internally so we make a shallow copy. */ UA_Boolean changed = false; UA_StatusCode retval = detectValueChange(server, mon, *value, &binValueEncoding, &changed); if(retval != UA_STATUSCODE_GOOD) { UA_LOG_WARNING_SESSION(&server->config.logger, session, "Subscription %u | " "MonitoredItem %i | Value change detection failed with StatusCode %s", sub ? sub->subscriptionId : 0, mon->monitoredItemId, UA_StatusCode_name(retval)); return retval; } if(!changed) { UA_LOG_DEBUG_SESSION(&server->config.logger, session, "Subscription %u | " "MonitoredItem %i | The value has not changed", sub ? sub->subscriptionId : 0, mon->monitoredItemId); return UA_STATUSCODE_GOOD; } /* The MonitoredItem is attached to a subscription (not server-local). * Prepare a notification and enqueue it. */ if(sub) { /* Allocate a new notification */ UA_Notification *newNotification = (UA_Notification *)UA_malloc(sizeof(UA_Notification)); if(!newNotification) { UA_ByteString_deleteMembers(&binValueEncoding); return UA_STATUSCODE_BADOUTOFMEMORY; } if(value->value.storageType == UA_VARIANT_DATA) { newNotification->data.value = *value; /* Move the value to the notification */ *movedValue = true; } else { /* => (value->value.storageType == UA_VARIANT_DATA_NODELETE) */ retval = UA_DataValue_copy(value, &newNotification->data.value); if(retval != UA_STATUSCODE_GOOD) { UA_ByteString_deleteMembers(&binValueEncoding); UA_free(newNotification); return retval; } } /* <-- Point of no return --> */ UA_LOG_DEBUG_SESSION(&server->config.logger, session, "Subscription %u | " "MonitoredItem %i | Enqueue a new notification", sub ? sub->subscriptionId : 0, mon->monitoredItemId); newNotification->mon = mon; UA_Notification_enqueue(server, sub, mon, newNotification); } /* Store the encoding for comparison */ UA_ByteString_deleteMembers(&mon->lastSampledValue); mon->lastSampledValue = binValueEncoding; /* Store the value for filter comparison (we don't want to decode * lastSampledValue in every iteration). Don't test the return code here. If * this fails, lastValue is empty and a notification will be forced for the * next deadband comparison. */ if((mon->filter.dataChangeFilter.deadbandType == UA_DEADBANDTYPE_NONE || mon->filter.dataChangeFilter.deadbandType == UA_DEADBANDTYPE_ABSOLUTE || mon->filter.dataChangeFilter.deadbandType == UA_DEADBANDTYPE_PERCENT) && (mon->filter.dataChangeFilter.trigger == UA_DATACHANGETRIGGER_STATUS || mon->filter.dataChangeFilter.trigger == UA_DATACHANGETRIGGER_STATUSVALUE || mon->filter.dataChangeFilter.trigger == UA_DATACHANGETRIGGER_STATUSVALUETIMESTAMP)) { UA_Variant_deleteMembers(&mon->lastValue); UA_Variant_copy(&value->value, &mon->lastValue); #ifdef UA_ENABLE_DA UA_StatusCode_deleteMembers(&mon->lastStatus); UA_StatusCode_copy(&value->status, &mon->lastStatus); #endif } /* Call the local callback if the MonitoredItem is not attached to a * subscription. Do this at the very end. Because the callback might delete * the subscription. */ if(!sub) { UA_LocalMonitoredItem *localMon = (UA_LocalMonitoredItem*) mon; void *nodeContext = NULL; UA_Server_getNodeContext(server, mon->monitoredNodeId, &nodeContext); localMon->callback.dataChangeCallback(server, mon->monitoredItemId, localMon->context, &mon->monitoredNodeId, nodeContext, mon->attributeId, value); } return UA_STATUSCODE_GOOD; }