winsockserverdlg.cpp

编程实例

// WinSockServerDlg.cpp : implementation file
//

#include "stdafx.h"
#include "WinSockServer.h"
#include "WinSockServerDlg.h"
#include <winsock.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

//CSocketListen *m_sAcceptSocket = new CSocketListen;
 

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWinSockServerDlg dialog

CWinSockServerDlg::CWinSockServerDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CWinSockServerDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CWinSockServerDlg)
	m_strChat = _T("");
	m_iPort = 1001;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CWinSockServerDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CWinSockServerDlg)
	DDX_Control(pDX, IDC_Exit, m_ctlExit);
	DDX_Control(pDX, IDC_Chat, m_lstChat);
	DDX_Control(pDX, IDC_End, m_ctlEnd);
	DDX_Control(pDX, IDC_Clear, m_ctlClear);
	DDX_Control(pDX, IDC_Start, m_btnStart);
	DDX_Control(pDX, IDC_ServerPort, m_ctlPort);
	DDX_LBString(pDX, IDC_Chat, m_strChat);
	DDX_Text(pDX, IDC_ServerPort, m_iPort);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CWinSockServerDlg, CDialog)
	//{{AFX_MSG_MAP(CWinSockServerDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_Start, OnStart)
	ON_BN_CLICKED(IDC_End, OnEnd)
	ON_BN_CLICKED(IDC_Exit, OnExit)
	ON_WM_CLOSE()
	ON_BN_CLICKED(IDC_Clear, OnClear)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWinSockServerDlg message handlers

BOOL CWinSockServerDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	//设置窗体标题，
	//AfxGetApp()->m_pMainWnd->SetWindowText();简写如下条语句。
	SetWindowText("服务器端程序"); 

	//将自定义的SocketListen类与对话框相关联
	m_sListenSocket.SetParent(this);
	//m_sAcceptSocket.SetParent(this);

	//初始的时候，“结束服务”按钮不可用
	m_ctlEnd.EnableWindow(false);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CWinSockServerDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CWinSockServerDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CWinSockServerDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CWinSockServerDlg::OnOK() 
{
	// TODO: Add extra validation here
	//屏蔽CDialog类的OnOk函数，不响应Enter按键
	//CDialog::OnOK();
}

void CWinSockServerDlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	//屏蔽CDialog类的OnCancel函数，不响应Esc按键
	//CDialog::OnCancel();
}

void CWinSockServerDlg::OnStart() 
{
	// TODO: Add your control notification handler code here

	//获取端口号
	UpdateData(true);

	//服务开启后，端口号和该按钮禁用
	m_ctlPort.EnableWindow(false);
	m_btnStart.EnableWindow(false);

	//“结束服务”按钮可用
	m_ctlEnd.EnableWindow(true);

	//创建服务器端套接字，Create函数的第二个关键字指明基于TCP协议
	m_sListenSocket.Create(m_iPort, SOCK_STREAM);
	m_sListenSocket.Listen();
}

void CWinSockServerDlg::OnEnd() 
{
	// TODO: Add your control notification handler code here
	m_sListenSocket.Close();
	
	int i;
	
	for(i=0; i< m_sAcceptSocketA.GetCount(); i++)
	{
		m_sAcceptSocketA.GetAt(m_sAcceptSocketA.FindIndex(i))->Close();
	}

	
	//m_sAcceptSocket.Close();

	//结束服务后，端口号和开启服务的按钮可用
	m_ctlPort.EnableWindow(true);
	m_btnStart.EnableWindow(true);

	//“结束服务”按钮不可用
	m_ctlEnd.EnableWindow(false);
}

void CWinSockServerDlg::OnExit() 
{
	// TODO: Add your control notification handler code here
	OnEnd();
	CDialog::OnOK();
}

void CWinSockServerDlg::OnClose() 
{
	// TODO: Add your message handler code here and/or call default
		
	//在单击窗体上的关闭按钮的时候能够正确关闭窗体
	OnEnd();
	CDialog::OnCancel();
}

//与Socket类相关的事件函数
void CWinSockServerDlg::OnAccept()
{
	int i;

	i = m_sAcceptSocketA.GetCount();;

	CSocketListen *m_sAcceptSocket = new CSocketListen;
	m_sAcceptSocket->SetParent(this);

	if(i < 5)
	{
		m_sAcceptSocketA.AddTail(m_sAcceptSocket);	
		i = m_sAcceptSocketA.GetCount();
	}
	else if(i >= 5 || i<=0)
	{
		AfxMessageBox("连接客户数太多了!");
		delete m_sAcceptSocket;
		return;
	}

	m_sListenSocket.Accept(*m_sAcceptSocketA.GetAt(m_sAcceptSocketA.FindIndex(i-1)));
}

void CWinSockServerDlg::OnSend()
{
}

void CWinSockServerDlg::OnSocketClose(CSocketListen *pSocket)
{
	CString	strSend;//发送的字符串
	int		iLen;
	int		iSend;

	DWORD	dwIp;//网络顺序形式的IP地址
	CString strIp;//连接方IP地址
	CString strName;//连接方主机名
	char	*pName = new char[256];
	UINT	iPort;
	int		iErr;
	struct	hostent	FAR *pHost;

	iErr = pSocket->GetPeerName(strIp, iPort);
		
	//如果上条语句执行正确的话，执行下列语句
	if(iErr != SOCKET_ERROR)
	{
		//取得网络顺序的IP值
		dwIp = inet_addr(strIp);
	
		//获取主机名称,注意其中第一个参数的转化
		pHost = gethostbyaddr((LPSTR)&dwIp, 4, AF_INET);

		memcpy(pName, pHost->h_name, 256);
		strName = pName;
	}
	else
	{
		delete pName;
		return;
	}

	strSend = strName + "["+ strIp+ "]: " + "已经退出本系统！";
	iLen = strSend.GetLength();


	m_sAcceptSocketA.RemoveAt(m_sAcceptSocketA.Find(pSocket));
	pSocket->Close();	

	// 通知当前在线的所有用户，有人退出系统！
	int i, k;
	k = m_sAcceptSocketA.GetCount();
	for(i=0; i < k; i++)
	{
		iSend = m_sAcceptSocketA.GetAt
			(m_sAcceptSocketA.FindIndex(i))->Send(LPCTSTR(strSend),iLen);
	}
	delete pName;
}

void CWinSockServerDlg::OnReceive(CSocketListen *pSocket)
{
	char	*pBuf = new char[1025];
	int		iBufSize = 1024;
	int		iRecvd;
	CString	strRecvd;//接收的数据信息字符串
	int		iLen;
	int		iSend;

	DWORD	dwIp;//网络顺序形式的IP地址
	CString strIp;//连接方IP地址
	CString strName;//连接方主机名
	char	*pName = new char[256];
	UINT	iPort;
	int		iErr;
	struct	hostent	FAR *pHost;

	iErr = pSocket->GetPeerName(strIp, iPort);
		
	//如果上条语句执行正确的话，执行下列语句
	if(iErr != SOCKET_ERROR)
	{
		//取得网络顺序的IP值
		dwIp = inet_addr(strIp);
	
		//获取主机名称,注意其中第一个参数的转化
		pHost = gethostbyaddr((LPSTR)&dwIp, 4, AF_INET);

		memcpy(pName, pHost->h_name, 256);
		strName = pName;
	}
	else
	{
		delete pBuf;
		delete pName;
		return;
	}

	// 接收信息，并返回接收到的字节数
	iRecvd = pSocket->Receive(pBuf, iBufSize);// m_sAcceptSocket.Receive(pBuf, iBufSize);
	// 判断是否有错误发生
	if (iRecvd == SOCKET_ERROR)
	{
		delete pBuf;
		delete pName;
		return;
	}
	else
	{
		// 利用NULL来截去接收缓存区中多余的字符
		pBuf[iRecvd] = NULL;
		// 将接收到的有用的信息赋值给CString变量
		strRecvd = pBuf;

		strRecvd = strName + "["+ strIp+ "]: " + strRecvd;
		iLen = strRecvd.GetLength();
	
		// 将接收到的信息加入到列表框中去,SendMessage将字符串添加到末尾
		//m_lstChat.AddString(strRecvd);
		m_lstChat.SendMessage(LB_INSERTSTRING, -1, (LPARAM)(LPCTSTR(strRecvd)));
		//将对应的变量的变化显示在控件上
		UpdateData(FALSE);

		//将接收到的信息转发给每个客户端
		int i, k;
		k = m_sAcceptSocketA.GetCount();
		for(i=0; i < k; i++)
		{
			iSend = m_sAcceptSocketA.GetAt
				(m_sAcceptSocketA.FindIndex(i))->Send(LPCTSTR(strRecvd),iLen);
		}
	}
	delete pBuf;
	delete pName;
}

void CWinSockServerDlg::OnClear() 
{
	// TODO: Add your control notification handler code here
	//清空列表框内容
	m_lstChat.SendMessage(LB_RESETCONTENT,0,0);
}