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9 result(s) for Communication Stack

• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  2.1.10 Communication Stack
  Communication Stack layered set of software modules between the application and the hardware that provides various functions to encode, encrypt and format a Message for sending, and to decode, decrypt
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.3 Service results
  DecodingError or Bad _ EncodingLimitsExceeded . If the receiver is the Client then the Communication Stack should report these errors to the Client application. Many applications will place limits on the size ... serialized response message exceeds the message size specified by the Client . Similarly, the Client Communication Stack should report a Bad _ RequestTooLarge error to the application before sending a message that
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.1 Overview
  implemented directly by the OPC UA Application . Instead, they are provided by the Communication Stack on which the OPC UA Application is built. For example, an OPC UA Server ... Application Session and the SecureChannel is illustrated in Figure 13 . The Communication Stack is used by the OPC UA Applications to exchange Messages . In the first step, the SecureChannel Services
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.6.2.1 Description
  ensure Confidentiality and Integrity for Message exchange during a Session . This Service requires the Communication Stack to apply the various security algorithms to the Messages as they are sent
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.2.1 Description
  support multiple Sessions for one SecureChannel . The SecureChannel is always managed by the Communication Stack which means it shall provide APIs which the Server can use to find out information ... about the SecureChannel used for any given request. The Communication Stack shall, at a minimum, provide the SecurityPolicy and SecurityMode used by the SecureChannel . It shall also provide a SecureChannelId
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.7.2.2 Parameters
  maximum size, in bytes, for the body of any request message. The Client Communication Stack should return a Bad_RequestTooLarge error to the application if a request message exceeds this
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.1.8 Calculating Signatures used in CreateSession and ActivateSession
  method for computing the ChannelThumbprint is defined in OPC 10000-6 . If the Communication Stack does not make it available to the application because the transport being used cannot support
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.35 SessionAuthenticationToken
  purposes of this discussion, a Server consists of application (code) and a Communication Stack as shown in Figure 37 . Figure 37 - Logical layers of a Server The security provided ... SessionAuthenticationToken depends on a trust relationship between the Server application and the Communication Stack . The Communication Stack shall be able to verify the sender of the message and it uses
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.38.2 Common StatusCodes
  objects being serialized. Bad_EncodingLimitsExceeded The message encoding/decoding limits imposed by the Communication Stack have been exceeded. Bad_IdentityTokenInvalid The user identity token is not valid. Bad_IdentityTokenRejected The user ... this general error code. This error code shall be used only by the Communication Stack and in services where it is defined in the list of valid StatusCodes