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Asked: 2026-05-22T12:24:34+00:00

I have written a server and a client both as separate apps. They communicate

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I have written a server and a client both as separate apps. They communicate through UDP Multicast (becouse I need that everyone who joins the group can read & write messages). Now I have two windows, but my aim is to create one simple chat program, but I don’t know how to listen and send at the same time. Do I need to create 2 sockets? Or can I use just one? I’ve even tried to merge both apps in one, but I didn’t succeeded (I know, I know.. but I was kinda desperate).

I’ve searched google for a tut, but didn’t succeeded.

I’m using c++.

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1 Answer

  1. Editorial Team

    You can use one or two sockets, it all depends on whether you wish to bind to a particular network adapter and whether you wish to use unicast & broadcast packets. It is often easier to manage one for sending and one for receiving.

    To listen to sent multicast packets on the same host check the IP_MULTICAST_LOOP socket option, noting it applies differently on Windows to Unix.

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