How to support multi client connections for one server?

[yanjunz]

I want to launch more than one clients to connect to one server.

[jlmessenger]

This library was designed for programs that needed sustained bi-directional communication, where a single client instance would connect to a single server instance on a pre-defined port.
This allows for really simple connection management. Ex: the server app would listen for client A on port 3001, and client B on port 3002, etc. Each client would connect, and once connected the server would stop listening on that port. Then if the connection is broken for any-reason the server would start listening on that port again, and the client can then simply re-establish the connection as soon as it is able.

private NetServer serverA = new NetServer();
private NetServer serverB = new NetServer();

public Setup() {
  // ... setup event handlers... 
  this.serverA.Listen(3001);
  this.serverB.Listen(3002);
}

If your trying to write something like a chat-room application, where clients each connect and disconnect at random - that is not supported due to the way the connection state management is written. The current server code, once it accepts a connection binds it to a single this.socket property and has a single incoming message buffer.
https://github.com/jlmessenger/NetSocket/blob/master/NetSocket/NetSocket.cs#L757

As the library is under the LGPL, you are free to modify the source code for your needs.
You could create a new class called NetConnection that can hold an individual socket, connection state and incoming message buffer. Then modify the server Accept() method to instantiate an instance of that class and attach it to a List<NetConnection>. You'd also need some clean-up code to ensure that as each NetConnection is closed it gets removed from the list, and on server Close you could iterate over the List and close each open connection.

Obviously this leaves alot of important details out - including the definition of NetConnection object, but may demonstrate the basic idea.

protected List<NetConnection> connections = new List<NetConnection>();
...
public void Accept(Socket client) {
  NetConnection connection = new NetConnection(client);
  this.connections.Add(connection);
}
...
public void Close(string reason) {
  foreach (var connection in this.connections) {
    connection.Close(reason);
  }
}

[yanjunz]

NetConnection is what I want, Thanks jlmessenger.