C＃异步UDP服务器-如何将套接字传递给回调

Question

我正在尝试编写一个异步udp服务器，并且在尝试理解某些内容的工作原理时遇到了困难。 在此代码上，程序在方法ClientConnected（）上停止，并表示作为套接字的asyncResult.asyncstate为null，那么如何将发送方的套接字传递给回调？

class UDPServer
{
byte[] byteData;
int bufferSize;

public ManualResetEvent allDone = new ManualResetEvent(false);

Socket serverSocket;
IPEndPoint localIPEP;
EndPoint sender = new IPEndPoint(IPAddress.Any, 0);

IPEndPoint[,] playerList = new IPEndPoint[5000, 2]; // 5000 possible player lobbies, each with 2 player ip addresses and ports
int playerListIndex = 0; // we start filling up the lobbies from 0

bool waitingForSecondClient;

public UDPServer(IPEndPoint serverIpEndPoint)
{
    bufferSize = 1024;
    byteData = new byte[1024];


    localIPEP = serverIpEndPoint;
    serverSocket = new Socket(AddressFamily.InterNetwork,SocketType.Dgram,ProtocolType.Udp);

    serverSocket.Bind(localIPEP);

    Console.WriteLine("Server setup complete.");
}

public void GetConnection()
{
    while (true)
    {
        allDone.Reset();
        Console.WriteLine("Waiting for new client.");
        serverSocket.BeginReceiveFrom(byteData, 0, bufferSize, SocketFlags.None, ref sender, ClientConnected, sender);
        allDone.WaitOne();
    }
}

public void ClientConnected(IAsyncResult asyncResult)
{
    allDone.Set();

    byte[] data = new byte[1024];
    data = byteData;
    byteData = null;
    Socket clientSocket = asyncResult.AsyncState as Socket;
    EndPoint remote = clientSocket.LocalEndPoint;
    int bytesReceived = serverSocket.EndReceiveFrom(asyncResult, ref remote);
    string message = Encoding.ASCII.GetString(data, 0, bytesReceived);
    remote = new IPEndPoint(IPAddress.Any, 0);
    serverSocket.BeginReceiveFrom(byteData, 0, bufferSize, SocketFlags.None, ref remote, ClientConnected, remote);


    Console.WriteLine("-------------");
    Console.WriteLine("Received bytes of data: " + bytesReceived);
    Console.WriteLine("-------------");
    Console.WriteLine("Received string: " + message);
    Console.WriteLine("-------------");

    if (message.Equals("New client"))
    {
        Send(clientSocket, "Hello");
    }