This structure contains security-related diagnostic information about client sessions. Its elements are defined in Table 232. Because this information is security-related, it shall only be accessible by authorised users.

Table 232– SessionSecurityDiagnosticsDataType Structure

Name

Type

Description

SessionSecurityDiagnosticsDataType

structure

sessionId

NodeId

Server-assigned identifier of the session.

clientUserIdOfSession

String

Name of authenticated user when creating the session.

clientUserIdHistory

String[]

Array containing the name of the authenticated user currently active (either from creating the session or from calling the ActivateSession Service) and the history of those names. Each time the active user changes, an entry shall be made at the end of the array. The active user is always at the end of the array. Servers may restrict the size of this array, but shall support at least a size of 2.

How the name of the authenticated user can be obtained from the system via the information received as part of the session establishment is defined in 6.4.3.

authenticationMechanism

String

Type of authentication currently used by the session. The String shall be one of the lexical names of the UserIdentityTokenTypeEnum.

encoding

String

Which encoding is used on the wire. The String shall be ‘XML’, ‘JSON’ or ‘UA Binary’.

transportProtocol

String

Which transport protocol is used. The String shall be the scheme from the URL used to establish the session. For example, ‘opc.tcp’, ‘opc.wss’ or ‘https’.

The formal protocol URL scheme strings are defined in OPC 10000-6.

securityMode

MessageSecurityMode

The message security mode used for the session.

securityPolicyUri

String

The name of the security policy used for the session.

clientCertificate

ByteString

The application instance certificate provided by the client in the CreateSession request.

Its representation in the AddressSpaceis defined in Table 233.

Table 233– SessionSecurityDiagnosticsDataType definition

Attributes

Value

BrowseName

SessionSecurityDiagnosticsDataType

IsAbstract

FALSE

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

Subtype of the Structure DataTypedefined in Table 182.

Conformance Units

Base Info ServerType