Windows XP套接字错误

本文关键字：错误 套接字 XP Windows | 更新日期: 2023-09-27 18:20:34

我有一个套接字客户端应用程序，它给出"由于套接字未连接，发送或接收数据的请求被禁止。"

public void Connect()
    {
        if (mPort == 0) throw new Exception("No ip set to client.");
        mSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        mSocket.BeginConnect(mHost, mPort, new AsyncCallback(OnConnected), mSocket);
        mReceiveBuffer = new byte[MAX_RECEIVE_BUFFER];
    }

private void OnConnected(IAsyncResult ar)
    {
        try
        {
            mSocket.EndConnect(ar);
            BeginReceive();
        }
        catch
        {
            Disconnect();
        }
    }
        private void BeginReceive()
    {
        mSocket.BeginReceive(inBuffer, 0, 300, SocketFlags.None, new AsyncCallback(onDataRecieve), mSocket);
    }

mSocket.BeginReceive上出现错误。这种情况仅在Windows XP上发生。有人知道为什么会发生这种事吗？

Windows XP套接字错误

您没有检查结果。连接尝试失败，并且您的OnConnect在超时后激发。

这是一个完整的工作示例。对我来说很好，对你来说也应该很好。你会注意到，我正在检查我是否真的连接了，并且我保持了执行所有工作的线程的活力。

public class Program
{
    static void Main(string[] args)
    {
        AsyncSocketTest test = new AsyncSocketTest();
        test.SocketTest();
    }
}
public class AsyncSocketTest
{
    private Socket socket;
    private byte[] buffer;
    private volatile bool keepRunning;
    public void SocketTest()
    {
        Console.Out.WriteLine("Starting connect...");
        Console.Out.Flush();
        buffer = new byte[65536];
        keepRunning = true;
        // connect to antiduh.com's web server
        socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        socket.BeginConnect(IPAddress.Parse("129.21.49.41"), 80, new AsyncCallback(OnConnect), null);
        // Keep the main thread alive while all of the async requests run.
        while (keepRunning) { Thread.Sleep(500); }
        Console.Out.WriteLine("Quitting.");
        Console.Out.Flush();
    }
    private void OnConnect(IAsyncResult result)
    {
        try
        {
            if (result.IsCompleted == false)
            {
                Console.Out.WriteLine("OnConnect got incomplete result: " + result);
            }
            else
            {
                socket.EndConnect(result);
                if (result.IsCompleted == false)
                {
                    Console.Out.WriteLine("OnConnect got incomplete result: " + result);
                }
                else
                {
                    Console.Out.WriteLine("Sending...");
                    byte[] requestBytes;
                    string requestString =
                        "GET / HTTP/1.1'n" +
                        "Host: antiduh.com'n" +
                        "'n";
                    requestBytes = Encoding.ASCII.GetBytes(requestString);
                    socket.Send(requestBytes);
                    Console.Out.WriteLine("Starting receive...");
                    socket.BeginReceive(
                        buffer, 
                        0, 
                        buffer.Length, 
                        SocketFlags.None, 
                        new AsyncCallback(OnReceive),
                        null
                    );
                }
            }
        }
        catch (Exception e)
        {
            Console.Out.WriteLine("Caught exception in OnConnect: " + e);
        }
        finally
        {
            Console.Out.Flush();
        }
    }
    private void OnReceive(IAsyncResult result)
    {
        int received = socket.EndReceive(result);
        string responseStr;
        Console.Out.WriteLine("Received data: Length: {0}. Data: 'r'n'r'n", received);
        Console.Out.Flush();
        responseStr = Encoding.ASCII.GetString(buffer, 0, received);
        Console.Out.WriteLine(responseStr);
        Console.Out.Flush();
        socket.Close();
        keepRunning = false;
    }
}

输出：

Starting connect...
Sending...
Starting receive...
Received data: Length: 1137. Data: 

HTTP/1.1 200 OK
Date: Tue, 02 Jul 2013 12:58:19 GMT
Server: Apache/2.2.24 (FreeBSD) PHP/5.4.16 SVN/1.8.0 mod_ssl/2.2.24 OpenSSL/1.0.1e DAV/2
Last-Modified: Tue, 11 Jul 2006 05:03:19 GMT
ETag: "352-418473fcd33c0"
Accept-Ranges: bytes
Content-Length: 850
Content-Type: text/html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>welcome to antiduh</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
<!--
body {
    background-color: #6666CC;
}
-->
</style></head>
<body>
<img src="index.gif" alt="index of steak" width="912" height="528" border="0" align="middle" usemap="#Map">
<map name="Map">
  <area shape="rect" coords="234,97,392,132" href="about.htm" alt="about">
  <area shape="rect" coords="691,150,846,186" href="projects.htm" alt="projects">
  <area shape="rect" coords="740,363,884,399" href="links.htm" alt="links">
  <area shape="rect" coords="423,478,562,511" href="misc.htm" alt="misc">
  <area shape="rect" coords="37,292,175,324" href="resume.htm" alt="resume">
</map>
</body>
</html>
Quitting.
相关文章：