TCP套接字接收每秒包 [英] TCP Socket receiving every second packet

问题描述

我想codeA基本的游戏，当一个球员做一动，对方收到数据包，反之亦然。是，正在被接收的问题仅每第二分组。我知道这是不是连接，因为它是一贯丢失的数据包相同的模式。

I'm trying to code a basic game, where when one player makes a move, the other receives the packet and vice versa. The problem is, only every second packet is being received. I know it's not the connection because it's consistently the same pattern of missed packets.

我的code是如下：

Socket serverSocket

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    //Take socket from another window that created it and start receiving
    serverSocket = Welcome.MainSocket;
    serverSocket.BeginReceive(Buffer, 0, Buffer.Length, SocketFlags.None, new AsyncCallback(OnReceive), null);

    //The initial definition of the socket was this (in the Welcome window)
    //MainSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    //MainSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
    //MainSocket.Bind(new IPEndPoint(OwnLocal, OwnPort));
    //MainSocket.Connect(Address, OppositePort);
}

private void OnReceive(IAsyncResult ar)
{
    OnlineData Data = OnlineData.FromByte(Buffer);

    //Do stuff with data on UI thread
    if (Data is MoveData)
    {   App.Current.Dispatcher.Invoke((Action)delegate
            {
                ((MoveData)Data).Sync(Game, Me == Game.PlayerOne ? 1 : 2);
            });
    }

    //End receive and start receiving again
    serverSocket.EndReceive(ar);
    serverSocket.BeginReceive(Buffer, 0, Buffer.Length, SocketFlags.None, new AsyncCallback(OnReceive), null);
}

//Called each time the player makes a move
void SocketSend(OnlineData Data)
{
    serverSocket.Send(Data.ToByte());
}

任何想法，为什么这会不会发生在我的情况，或在任何其他情况？谢谢！

Any ideas why this would ever happen in my case or in any other situation? Thanks!

推荐答案

发生了什么事是，我有两个不同的AsyncCallbacks为BeginRecieve，一是从套接字创建原来的窗口（欢迎），以及一个用于此窗口。每当其他计算机发送一个信息，那receieved数据是的AsyncCallback的交替的两者之间。

What was happening was that I had two different AsyncCallbacks for BeginRecieve, one from the original window ("Welcome") in which the socket was created, and one for this window. Each time the other computer sent a message, the AsyncCallback that receieved the data was alternating between the two.

这故事告诉我们：只有一个AsyncCallback的一个插座，除非你的需要的只接收每秒分组

Moral of this story: Only have one AsyncCallback for a socket unless you want to only receive every second packet.

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