Multiple Clients?

What is the best way for a tcp server to accept multiple tcp clients? The clients have no way of knowing what ports are already used by the server. Is there some way to setup portforwarding on the server?

Well most servers use a constant port number such as 10000 or something like that. Then the user connects to the server's ip address and that port number. The port number may be in the program by default or available on the program/game's website.

I understand the constant port number. But if there are multiple clients can they all be connected on the same port?

Yes.

Could you explain to me how to do that?

This is what I have so far:

Server

Code:

---

Dim client(9) As TcpClient
    Dim server As TcpListener
    Dim listthread As New System.Threading.Thread(AddressOf accept)
Sub createthread()
        buttonstate(True)
        Dim i As Integer

        For i = 0 To client.Length - 1
            client(i) = New TcpClient()
        Next

        server = New TcpListener(IPAddress.Any, 2999)

        server.Start()

        listthread.Start()


    End Sub
 Sub accept()
        Dim j As Integer = 0
        Dim i As Integer
        While 1
            For i = 0 To client.Length - 1
                If client(i).Client.Connected Then
                    j = i
                    Exit For
                End If
            Next
            Try
                server.Start()
                client(j) = server.AcceptTcpClient()
                setcresults(client(j).Client.RemoteEndPoint.ToString & ": Connected")
                Dim stream As NetworkStream = client(j).GetStream
            Catch ex As Exception
                MsgBox(ex.Message)
            End Try
        End While
    End Sub

---

Client

Code:

---

Dim networkstream As System.Net.Sockets.NetworkStream
    Dim tcpclient As New Net.Sockets.TcpClient()
Sub connect()
        While 1
            Try
                Try
                    tcpclient.Connect("sccrstvn93.no-ip.org", 2999)
                Catch ex As Exception
                    MsgBox(ex.Message)
                End Try


                While 1
                    networkstream = tcpclient.GetStream
                    acceptdata()
                    executecommand(clientdata)
                End While

            Catch ex As Exception
                MsgBox(ex.Message)
            End Try
        End While
    End Sub

---