The client-to-client communication is realized without server relay.

  node.js, question

For help, how does socket realize communication between clients and multiple clients? The server only sends ip addresses and does not send other information.

Why does your demand sound so much like what wild dogs said in a blog post by insideWebRTC implements video chat toolThings:

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Maybe it is useful for you:How to Use Wild Dogs to Build Video Chat Rooms -WebRTC’s Technical Practice