Service Virtualization

TCP service listening and answering in different ports. Is it possible?

  • 1.  TCP service listening and answering in different ports. Is it possible?

    Posted 11-07-2016 12:14 PM

    I have to virtualize a very particular TCP service. The client application opens 2 persistent connections to 2 different ports, one for requests and one for responses. 

     

                              REQ

    APP (client) -------------> (port 4321) Server

     

                              RSP

    APP (client) <------------- (port 4322) Server

     

    The client opens both connections to the shown ports. The arrows shows the direction of the data (requests/responses)

     

    I don't know the specific reason for this, but seems a poorly designed architecture. In a normal scenario the clients open TCP connections to a specific port and the requests and responses happen inside that connection until it closes. This is also the way DevTest creates the model file and allows you to virtualice services.

     

    I have also a PCAP file with real traffic and the TCP configuration tab only allows you to filter one port, so I only get requests alone. This is not a big deal since I can manually fill the responses if needed.

     

    Do any of you had to face a similar implementation and were able to solve it? If so, how did you do it?

     

    DevTest version: 9.5.1