Question

Is there any way of dealing with sessions with sockets in C#?

Example of my problem:
I have a server with a socket listening on port 5672.

TcpListener socket = new TcpListener(localAddr, 5672);  
socket.Start();  
Console.Write("Waiting for a connection... ");  

// Perform a blocking call to accept requests.  
TcpClient client = socket.AcceptTcpClient();  
Console.WriteLine("Connected to client!");

And i have two clients that will send one byte. Client A send 0x1 and client B send 0x2.
From the server side, i read this data like this:

Byte[] bytes = new Byte[256];
String data = null;

NetworkStream stream = client.GetStream();
while ((stream.Read(bytes, 0, bytes.Length)) != 0)
{
     byte[] answer = new ...
     stream.Write(answer , 0, answer.Length);
}  

Then client A sends 0x11.
I need a way to know that this client is the same that sent “0x1” before.

Answer 1

Each TcpClient instance is for a different connection. A connection in TCP consists of four things: source IP, source port, target IP, target port. So, even if you have the same target IP and port, and the same source port, you have two different connections.

Data sent by one client will not be mixed in with data sent by the other client. Data sent by a client on a connection will be received in order over that connection.

The only time that Sessions become an issue is to remember the client after the connection is closed.