Multi connection

In lightyear, connections are just entities with IO components, so a server can serve several transports at the same time. This means that the server could:

• open a port to establish steam socket connections
• open another port for UDP connections
• open another port for WebTransport connections
• etc.

and have all these connections running at the same time.

You can therefore have cross-play between different platforms.

Another potential usage is to have a “HostServer” setup where a client acts as the “host”:

• the Client and the Server run in the same process (this is the HostClient topology; the simple_box example runs it with Mode::HostClient)
• the in-process client talks to the server over local (crossbeam) channels
• other clients can still connect to the same server over UDP, WebTransport, etc.