OPCTunneller

Allows OPC (classic) data transfers between computers over TCP/IP (possible SSL) without DCOM

Components

• Server side
  • NKOpcTnlSrv.exe (Service)
    • (ssl) socket server listen for incomming client calls
    • Interact with the OPC servers and serialize in/out COM function calls from/to TCP/IP stream
  • NkTnlServerCnf.exe
    • Configuration Tool: change server properties; interact with the service
• Client side
  • NKTnlClient.dll
    • COM server component and proxy for the remote OPC Server
    • For the OPC Client is the network connection fully transparent
  • NkTnlClientCnf.exe
    • Manage the tunnel connections
    • Select remote OPC Servers
    • Test connections

Operating System

• Microsoft Windows7 or (maybe) greater

Build Environment

• Microsoft Visual Studio 2017
• OpenSSL 1.0.2x (x86) installed e.g. -> Win32 OpenSSL
  • User Makro
    • Set OpenSSL_Include_Path to OpenSSl Header Path e.g. "C:\Program Files (x86)\OpenSSL-Win32\include"
    • Set OpenSSL_Lib_Path to OpenSSl library Path e.g. "C:\Program Files (x86)\OpenSSL-Win32\lib"
• Register bin\NKTnlClient(D).dll with regsrv32.exe and call bin\ NkTnlSrv(D).exe -register to add information to the registry for the configuration tools

Dependencies

• Microsoft Visual C++ Redistributable 2017 (x86) (VC++ 14.0)
• Microsoft Visual C++ Redistributable 2013 (x86) (VC++ 12.0)
• OpenSSL runtime DLL's
• For testing you need a "classic OPC DA (demo) Server" and a "classic OPC DA (test) Client"
• OPC Core Components from www.opcfoundation.org