Common Definitions ================== Common definitions for Client, Server and PubSub. .. _attribute-id: Attribute Id ------------ Every node in an OPC UA information model contains attributes depending on the node type. Possible attributes are as follows: .. code-block:: c typedef enum { UA_ATTRIBUTEID_NODEID = 1, UA_ATTRIBUTEID_NODECLASS = 2, UA_ATTRIBUTEID_BROWSENAME = 3, UA_ATTRIBUTEID_DISPLAYNAME = 4, UA_ATTRIBUTEID_DESCRIPTION = 5, UA_ATTRIBUTEID_WRITEMASK = 6, UA_ATTRIBUTEID_USERWRITEMASK = 7, UA_ATTRIBUTEID_ISABSTRACT = 8, UA_ATTRIBUTEID_SYMMETRIC = 9, UA_ATTRIBUTEID_INVERSENAME = 10, UA_ATTRIBUTEID_CONTAINSNOLOOPS = 11, UA_ATTRIBUTEID_EVENTNOTIFIER = 12, UA_ATTRIBUTEID_VALUE = 13, UA_ATTRIBUTEID_DATATYPE = 14, UA_ATTRIBUTEID_VALUERANK = 15, UA_ATTRIBUTEID_ARRAYDIMENSIONS = 16, UA_ATTRIBUTEID_ACCESSLEVEL = 17, UA_ATTRIBUTEID_USERACCESSLEVEL = 18, UA_ATTRIBUTEID_MINIMUMSAMPLINGINTERVAL = 19, UA_ATTRIBUTEID_HISTORIZING = 20, UA_ATTRIBUTEID_EXECUTABLE = 21, UA_ATTRIBUTEID_USEREXECUTABLE = 22, UA_ATTRIBUTEID_DATATYPEDEFINITION = 23, UA_ATTRIBUTEID_ROLEPERMISSIONS = 24, UA_ATTRIBUTEID_USERROLEPERMISSIONS = 25, UA_ATTRIBUTEID_ACCESSRESTRICTIONS = 26, UA_ATTRIBUTEID_ACCESSLEVELEX = 27 } UA_AttributeId; Access Level Masks ------------------ The access level to a node is given by the following constants that are ANDed with the overall access level. .. code-block:: c #define UA_ACCESSLEVELMASK_READ (0x01u << 0u) #define UA_ACCESSLEVELMASK_WRITE (0x01u << 1u) #define UA_ACCESSLEVELMASK_HISTORYREAD (0x01u << 2u) #define UA_ACCESSLEVELMASK_HISTORYWRITE (0x01u << 3u) #define UA_ACCESSLEVELMASK_SEMANTICCHANGE (0x01u << 4u) #define UA_ACCESSLEVELMASK_STATUSWRITE (0x01u << 5u) #define UA_ACCESSLEVELMASK_TIMESTAMPWRITE (0x01u << 6u) Write Masks ----------- The write mask and user write mask is given by the following constants that are ANDed for the overall write mask. Part 3: 5.2.7 Table 2 .. code-block:: c #define UA_WRITEMASK_ACCESSLEVEL (0x01u << 0u) #define UA_WRITEMASK_ARRRAYDIMENSIONS (0x01u << 1u) #define UA_WRITEMASK_BROWSENAME (0x01u << 2u) #define UA_WRITEMASK_CONTAINSNOLOOPS (0x01u << 3u) #define UA_WRITEMASK_DATATYPE (0x01u << 4u) #define UA_WRITEMASK_DESCRIPTION (0x01u << 5u) #define UA_WRITEMASK_DISPLAYNAME (0x01u << 6u) #define UA_WRITEMASK_EVENTNOTIFIER (0x01u << 7u) #define UA_WRITEMASK_EXECUTABLE (0x01u << 8u) #define UA_WRITEMASK_HISTORIZING (0x01u << 9u) #define UA_WRITEMASK_INVERSENAME (0x01u << 10u) #define UA_WRITEMASK_ISABSTRACT (0x01u << 11u) #define UA_WRITEMASK_MINIMUMSAMPLINGINTERVAL (0x01u << 12u) #define UA_WRITEMASK_NODECLASS (0x01u << 13u) #define UA_WRITEMASK_NODEID (0x01u << 14u) #define UA_WRITEMASK_SYMMETRIC (0x01u << 15u) #define UA_WRITEMASK_USERACCESSLEVEL (0x01u << 16u) #define UA_WRITEMASK_USEREXECUTABLE (0x01u << 17u) #define UA_WRITEMASK_USERWRITEMASK (0x01u << 18u) #define UA_WRITEMASK_VALUERANK (0x01u << 19u) #define UA_WRITEMASK_WRITEMASK (0x01u << 20u) #define UA_WRITEMASK_VALUEFORVARIABLETYPE (0x01u << 21u) ValueRanks ---------- The following are the most common ValueRanks used for Variables, VariableTypes and method arguments. ValueRanks higher than 3 are valid as well (but less common). .. code-block:: c #define UA_VALUERANK_SCALAR_OR_ONE_DIMENSION -3 #define UA_VALUERANK_ANY -2 #define UA_VALUERANK_SCALAR -1 #define UA_VALUERANK_ONE_OR_MORE_DIMENSIONS 0 #define UA_VALUERANK_ONE_DIMENSION 1 #define UA_VALUERANK_TWO_DIMENSIONS 2 #define UA_VALUERANK_THREE_DIMENSIONS 3 EventNotifier ------------- The following are the available EventNotifier used for Nodes. The EventNotifier Attribute is used to indicate if the Node can be used to subscribe to Events or to read / write historic Events. Part 3: 5.4 Table 10 .. code-block:: c #define UA_EVENTNOTIFIER_SUBSCRIBE_TO_EVENT (0x01u << 0u) #define UA_EVENTNOTIFIER_HISTORY_READ (0x01u << 2u) #define UA_EVENTNOTIFIER_HISTORY_WRITE (0x01u << 3u) .. _rule-handling: Rule Handling ------------- The RuleHanding settings define how error cases that result from rules in the OPC UA specification shall be handled. The rule handling can be softened, e.g. to workaround misbehaving implementations or to mitigate the impact of additional rules that are introduced in later versions of the OPC UA specification. .. code-block:: c typedef enum { UA_RULEHANDLING_DEFAULT = 0, UA_RULEHANDLING_ABORT, /* Abort the operation and return an error code */ UA_RULEHANDLING_WARN, /* Print a message in the logs and continue */ UA_RULEHANDLING_ACCEPT, /* Continue and disregard the broken rule */ } UA_RuleHandling; Order ----- The Order enum is used to establish an absolute ordering between elements. .. code-block:: c typedef enum { UA_ORDER_LESS = -1, UA_ORDER_EQ = 0, UA_ORDER_MORE = 1 } UA_Order; Connection State ---------------- .. code-block:: c typedef enum { UA_SECURECHANNELSTATE_FRESH = 0, UA_SECURECHANNELSTATE_HEL_SENT, UA_SECURECHANNELSTATE_HEL_RECEIVED, UA_SECURECHANNELSTATE_ACK_SENT, UA_SECURECHANNELSTATE_ACK_RECEIVED, UA_SECURECHANNELSTATE_OPN_SENT, UA_SECURECHANNELSTATE_OPEN, UA_SECURECHANNELSTATE_CLOSING, UA_SECURECHANNELSTATE_CLOSED } UA_SecureChannelState; typedef enum { UA_SESSIONSTATE_CLOSED, UA_SESSIONSTATE_CREATE_REQUESTED, UA_SESSIONSTATE_CREATED, UA_SESSIONSTATE_ACTIVATE_REQUESTED, UA_SESSIONSTATE_ACTIVATED, UA_SESSIONSTATE_CLOSING } UA_SessionState; Statistic counters ------------------ The stack manages statistic counters for the following layers: - Network - Secure channel - Session The session layer counters are matching the counters of the ServerDiagnosticsSummaryDataType that are defined in the OPC UA Part 5 specification. Counters of the other layers are not specified by OPC UA but are harmonized with the session layer counters if possible. .. code-block:: c typedef struct { size_t currentConnectionCount; size_t cumulatedConnectionCount; size_t rejectedConnectionCount; size_t connectionTimeoutCount; size_t connectionAbortCount; } UA_NetworkStatistics; typedef struct { size_t currentChannelCount; size_t cumulatedChannelCount; size_t rejectedChannelCount; size_t channelTimeoutCount; /* only used by servers */ size_t channelAbortCount; size_t channelPurgeCount; /* only used by servers */ } UA_SecureChannelStatistics; typedef struct { size_t currentSessionCount; size_t cumulatedSessionCount; size_t securityRejectedSessionCount; /* only used by servers */ size_t rejectedSessionCount; size_t sessionTimeoutCount; /* only used by servers */ size_t sessionAbortCount; /* only used by servers */ } UA_SessionStatistics; .. include:: util.rst