No, unfortunately I have no experience in any of these languages. 'My languages' are ANSI C, VB.Net and C#. I will soon add Python to that list, for my work. But for now that's it. As you probably can see from my question, I am a newbie when it comes to network communication.
Thanks for pointing my to Mosquitto. It will be a possibility to explore, even though I hoped to find a solution without any third party tools. But as I understand from all these answers, this is probably impossible at the moment. Whatever the solution will be, it will take me to new horizons. I hope to come back to this thread and share my experience.