socket只响应一次FD_ACCEPT是什么问题

[秀小川]

OnBnClickedStartServer()
{
WSADATA wsaData;

		int ret = WSAStartup(MAKEWORD(2,0),&wsaData);
		if(ret)
		{
			AfxMessageBox(_T("初始化网络失败！"));
		}
		m_Socket = ::socket(AF_INET,SOCK_STREAM,0);
		ASSERT(m_Socket != INVALID_SOCKET);

		CString str;
		char host_name[255]={NULL};

		if ( !gethostname(host_name,sizeof(host_name)))
		{
			PHOSTENT host_info = gethostbyname(host_name);
			char *ip = inet_ntoa (*(struct in_addr *)*host_info->h_addr_list);
			m_addr.sin_family = AF_INET;
			m_addr.sin_addr.S_un.S_addr = inet_addr(ip);
			m_addr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
			m_addr.sin_port = htons(_wtoi(m_strPCPort));
			ret = bind(m_Socket,(sockaddr*)&m_addr,sizeof(m_addr));
			if(ret ==SOCKET_ERROR)
			{
				CString strTemp(_T(""));
				strTemp.Format(_T("绑定失败,错误代码%d"), GetLastError());
				showMsg(strTemp);
				closesocket(m_Socket);
				WSACleanup();
				return ;
			}
			ret = listen(m_Socket,5);
			if(ret ==SOCKET_ERROR)
			{
				CString strTemp(_T(""));
				strTemp.Format(_T("绑定失败,错误代码%d"), GetLastError());
				showMsg(strTemp);
				closesocket(m_Socket);
				WSACleanup();
				return ;
			}
			showMsg(_T("服务器启动成功.") );
			WSAAsyncSelect(m_Socket,this->m_hWnd,WM_SOCK,FD_ACCEPT|FD_READ|FD_CLOSE|FD_CONNECT);
		}
}


LRESULT CTransimitSMSDlg::OnSocket(WPARAM wParam, LPARAM lParam)
{	
	UpdateData();
	char data[100];
	CString strTemp, strShow;
	ZeroMemory(data, 100);
	int len;
	SOCKET sock;

	switch (lParam)
	{
	case FD_READ:
		sock = (SOCKET)wParam;
		len = recv(sock,data,100,NULL);
		strShow = (_T("收到数据:"));
		for ( int i = 0;i < len; i++)
		{
			strTemp.Format(_T("%02X "), data[i]);
			strShow += strTemp;
		}
	case FD_ACCEPT: 
	//	s = ::accept(m_Socket,NULL,NULL);
		strShow = _T("有客户连接!");
		break;
	case FD_CLOSE:
		strShow = _T("客户断开连接!");		
		break;
	default:
		break;
		
	}
	showMsg(strShow);
	UpdateData(FALSE);
	return 0;
}

一个简单的网络编程的小例子,为什么我的Socket只响应一次FD_ACCEPT消息以后,不再响应任何消息..........

[Eleven]

FD_ACCEPT: a. When WSAAsyncSelect called, if there is currently a connection request available to accept. b. When a connection request arrives, if FD_ACCEPT not already posted. c .After accept called, if there is another connection request available to accept. 只有一个客户端去连接（客户端调用connect()) ？？？

[秀小川]

引用 1 楼 VisualEleven 的回复:

FD_ACCEPT: a. When WSAAsyncSelect called, if there is currently a connection request available to accept. b. When a connection request arrives, if FD_ACCEPT not already posted. c .After accept called, if there is another connection request available to accept. 只有一个客户端去连接（客户端调用connect()) ？？？

客户端我还没写,用的是一个 "网络调试助手",我用两个客户端去连接也是只接到一次FD_ACCEPT消息