subject_39328.htm

一些关于vc的问答

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序号：39328 发表者：约翰列侬 发表日期：2003-05-09 21:04:52
<br>主题：用Telnet为什么不能连接到主机？
<br>内容：我刚开始学网络编程，想写一个C/S程序。为了测试，我把代码写到accept()后就运行程序，<BR>然后在Win2K的命令提示符中用telnet 127.0.0.1 2626，(2626是我在程序中监听的端口号)<BR>但总是显示“正在连接到127.0.0.1...无法打开到主机的连接 在端口 2626 : 连接失败”<BR>而总是无法连接到服务端。<BR><BR>程序代码如下，程序能够顺利地执行到accept()方法内。请教我哪里错了，谢谢，急。<BR><BR>BOOL CNetTalk1Dlg::OnInitDialog()<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;// ……<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;this-&gt;m_serv.sin_family = AF_INET;&nbsp;&nbsp;&nbsp;&nbsp;//sockaddr_in m_serv;<BR>&nbsp;&nbsp;&nbsp;&nbsp;this-&gt;m_serv.sin_port = 2626;<BR>&nbsp;&nbsp;&nbsp;&nbsp;this-&gt;m_serv.sin_addr.s_addr = htonl(INADDR_ANY);<BR>&nbsp;&nbsp;&nbsp;&nbsp;this-&gt;m_nAddLen = sizeof(this-&gt;m_serv);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//int m_nAddLen;<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;this-&gt;m_sock = socket(AF_INET, SOCK_STREAM, 0);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//SOCKET m_sock;<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;if (bind(this-&gt;m_sock, (sockaddr*)&amp;(this-&gt;m_serv), this-&gt;m_nAddLen))<BR>&nbsp;&nbsp;&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this-&gt;ShowMsg("系统消息：绑定错误！");<BR>&nbsp;&nbsp;&nbsp;&nbsp;}<BR>&nbsp;&nbsp;&nbsp;&nbsp;else<BR>&nbsp;&nbsp;&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this-&gt;ShowMsg("系统消息：OK！服务器创建成功！");<BR>&nbsp;&nbsp;&nbsp;&nbsp;}<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;listen(this-&gt;m_sock, 5);<BR>&nbsp;&nbsp;&nbsp;&nbsp;AfxBeginThread(SubThread, 0);<BR>}<BR><BR>UINT SubThread(LPVOID p)<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;CNetTalk1Dlg* mainWnd = (CNetTalk1Dlg*)AfxGetApp()-&gt;GetMainWnd();<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;// SOCKET m_sockMsg;<BR>&nbsp;&nbsp;&nbsp;&nbsp;mainWnd-&gt;m_sockMsg = <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;accept(mainWnd-&gt;m_sock, (sockaddr*)&amp;(mainWnd-&gt;m_serv), &amp;(mainWnd-&gt;m_nAddLen));<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;this-&gt;ShowMsg("系统消息：OK！已经有客户端连接！");<BR>&nbsp;&nbsp;&nbsp;&nbsp;//……<BR>}
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<font color=red>答案被接受</font><br>回复者：jasic 回复日期：2003-05-10 12:05:02
<br>内容：this-&gt;m_serv.sin_port = 2626;<BR>这句话改称this-&gt;m_serv.sin_port = htons(2626);<BR>试试<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
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