Multiple clients with Server Application more than 15 clients handling issue

I have a Server Application written in C# .NET and running on Windows XP SP3.

I am using asynchronous sockets programming for handling around 500 clients.

But I got a problem to entertain more than 15 client connections.

My application got shut down when 1 more client connected after 15 clients; I am not understanding whether the problem is with my OS or is a tcp connection limitation problem in Windows XP.

Please help to solve out this issue, please suggest any solution.

Update:

Here is my piece of code.

public开发者_如何学Go const int MAX_CLIENTS = 200;
public AsyncCallback pfnWorkerCallBack;

private Socket[] m_workerSocket = new Socket[MAX_CLIENTS];
    
// class for worker socket & callback method & data buffer
private SocketPacket[] m_workerSocketPkt = new SocketPacket[MAX_CLIENTS];

// page Load

m_mainSocket = new Socket(AddressFamily.InterNetwork,
                          SocketType.Stream,
                          ProtocolType.Tcp);
IPEndPoint ipLocal = new IPEndPoint(IPAddress.Any, 4321);
// Bind to local IP Address...
m_mainSocket.Bind(ipLocal);
// Start listening...
m_mainSocket.Listen(MAX_CLIENTS);

m_mainSocket.BeginAccept(new AsyncCallback(OnClientConnect), null);

// called when client is connected

public void OnClientConnect(IAsyncResult asyn)
{
    try
    {
        m_clientCount = setclient();

        SocketPacket abc = new SocketPacket();

        m_workerSocketPkt[m_clientCount] = abc; //assigning with SocketPacket class
        m_workerSocketPkt[m_clientCount].m_currentSocket =
                m_mainSocket.EndAccept(asyn);   //transferring connection to other thread
        m_workerSocketPkt[m_clientCount].m_clientCount = m_clientCount;

        m_workerSocketPkt[m_clientCount].templist = abcde; //assigning Amj (list) class
        m_workerSocket[m_clientCount] = m_workerSocketPkt[m_clientCount].m_currentSocket;

        pfnWorkerCallBack = new AsyncCallback(m_workerSocketPkt[m_clientCount].OnDataReceived); //defining AsynCallBack function for the accepted socket

        m_workerSocketPkt[m_clientCount].oldpfnWorkerCallBack = pfnWorkerCallBack;

        m_workerSocketPkt[m_clientCount].data_rec = false;
        m_workerSocketPkt[m_clientCount].data_sent = false;

        m_workerSocketPkt[m_clientCount].m_currentSocket.BeginReceive(
            m_workerSocketPkt[m_clientCount].dataBuffer,        //assigning data buffer for receiving for the socket
            0,                                                  //assigning data buffer offset for receiving for the socket
            m_workerSocketPkt[m_clientCount].dataBuffer.Length, //assigning maximum data length for receiving for the socket
            SocketFlags.None,                                   //socket flags
            pfnWorkerCallBack,                                  //AysnCallBack delegate
            m_workerSocketPkt[m_clientCount].m_currentSocket    //state
        );

        m_mainSocket.BeginAccept(new AsyncCallback(OnClientConnect), null); //start invitation for other new sockets
    }

The Max Client Value is here 200 and worker sockets also, so it should handle 200 clients but I think it's creating a problem in receiving data from more than 15 clients because every client that is connected is continuously connected and sends data to the server.

Increase the m_workerSocketPkt array (or m_workerSocket) to more than 15 or convert it to a List<>. (I'm guessing since you did not show it's declaration)

Your even the most basic Windows XP system should be able to handle 1000 connections. TCP is allows thousands of connection per client machine. (I wouldn't suggest more than 100K per server)

If your program is failing its likely to be a bug in your code. Is possible it producing an error your are ignoring? What is the error your program gets?