chatdlg.cpp

利用Visual C++的Windows SOCKET网络编程实现局域网内正在使用本程序的所有主机的群聊、两主机之间的点对点聊天和文件传送功能

// ChatDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Chat.h"
#include "ChatDlg.h"
#include "ChatUser.h"
#include "FileInfo.h"
#include <afxsock.h>
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

UINT FileSendProc(LPVOID lParam);

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()

/////////////////////////////////////////////////////////////////////////////
// CChatDlg dialog

CChatDlg::CChatDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CChatDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CChatDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

	//使一台机只能运行一个实例
	hMutex=CreateMutex(NULL,TRUE,"chat");		//创建互斥对象，名称为chat
	if(hMutex)
	{
		if(ERROR_ALREADY_EXISTS==GetLastError())	//先前已有对象被创建
		{
			MessageBox("一台机只能运行一个实例!");
			//OnOK();
			//EndDialog(0);
			//SendMessge(WM_CLOSE,0,0);
			::exit(0);								//退出程序
		}
	}
}


CChatDlg::~CChatDlg()
{
	Leave();	//发送退出程序广播信息“out”
	if(m_bSocket)
		closesocket(m_bSocket);	//关闭套接字
	if(m_sSocket)
		closesocket(m_sSocket);
	if(m_pubSocket)
		closesocket(m_pubSocket);
	if(m_priSocket)
		closesocket(m_priSocket);
	if(m_fileSocket)
		closesocket(m_fileSocket);

	int i,size=m_userArray.GetSize();	//获取在线用户个数
	for(i=0;i<size;i++)
	{
		free(((CChatUser*)m_userArray.GetAt(i))->m_pChatDlg);	//销毁与用户对应的私聊对话框
		free((CChatUser*)m_userArray.GetAt(i));		//销毁记录用户信息的CChatUser类的实例
	}
	m_userArray.RemoveAll();	//删除序列里的所有指针

}


void CChatDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CChatDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CChatDlg, CDialog)
	//{{AFX_MSG_MAP(CChatDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_LBN_DBLCLK(IDC_LIST_USER, OnDblclkListUser)
	ON_BN_CLICKED(IDC_BTN_PUB_SEND, OnBtnPubSend)
	ON_BN_CLICKED(IDC_UPDATE_USER_LIST, OnUpdateUserList)
	//}}AFX_MSG_MAP
	ON_MESSAGE(UM_BCSOCK,OnBCSock)		//各网络读取事件的消息映射
	ON_MESSAGE(UM_SCSOCK,OnSCSock)
	ON_MESSAGE(UM_PUBSOCK,OnPUBSock)
	ON_MESSAGE(UM_PRISOCK,OnPRISock)
	ON_MESSAGE(UM_FILECONNSOCK,OnFileConnSock)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CChatDlg message handlers

BOOL CChatDlg::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

	InitSocket();		//初始化套接字
	UpdateUserList();	//刷新在线用户列表
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CChatDlg::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 CChatDlg::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 CChatDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}


BOOL CChatDlg::InitSocket()		//初始化套接字
{
	//test=0;
	//m_ownHost=GetIP();
	//SOCKADDR_IN testsock;
	//m_ownADDR.sin_addr.S_un.S_addr=*((DWORD*)m_ownHost->h_addr_list[0]);
	//ownIP.Format("%s",inet_ntoa(m_ownADDR.sin_addr));
	//ownIP.Format("%b",*(DWORD*)m_ownHost->h_addr_list[0]);
	//MessageBox(inet_ntoa(m_ownADDR.sin_addr));
	CChatUser *pUser=new CChatUser();	//通过重载CChatUser类的构造函数获取本机IP地址和主机名
	m_ownIP=pUser->m_host_IP;			//保存本机IP地址
	m_ownHost=pUser->m_host_name;		//保存本机主机名
	//free(pUser);
	//MessageBox(pUser->m_host_IP);
	//m_userArray.Add(pUser);

	
	//建立广播套接字
	m_bSocket=WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,0);		//采用UDP
	if(INVALID_SOCKET==m_bSocket)
	{
		MessageBox("创建广播套接字失败！");
		return FALSE;
	}

	SOCKADDR_IN ownSock;	
	BOOL optval=TRUE;

	ownSock.sin_family=AF_INET;				//设置地址，端口
	ownSock.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
	ownSock.sin_port=htons(55170);
	  
	setsockopt(m_bSocket,SOL_SOCKET,SO_BROADCAST,(char FAR *)&optval,sizeof(optval));	//设置该套接字为广播类型

	if(SOCKET_ERROR==bind(m_bSocket,(SOCKADDR*)&ownSock,sizeof(SOCKADDR)))	//绑定
	{
		MessageBox("广播绑定失败！");
		return FALSE;
	}
	if(SOCKET_ERROR==WSAAsyncSelect(m_bSocket,m_hWnd,UM_BCSOCK,FD_READ))	//注册广播网络读取事件
	{
		MessageBox("注册广播网络读取事件失败！");
		return FALSE;
	}
	
	/*CString str;	
	str.Format("%s",inet_ntoa(ownSock.sin_addr));
	MessageBox(str);*/

	//建立单播套接字
	m_sSocket=WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,0);		//采用UDP
	if(INVALID_SOCKET==m_sSocket)
	{
		MessageBox("创建单播套接字失败！");
		return FALSE;
	}

	SOCKADDR_IN ownSock1;
	ownSock1.sin_family=AF_INET;				//设置地址，端口
	ownSock1.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
	ownSock1.sin_port=htons(55172);

	if(SOCKET_ERROR==bind(m_sSocket,(SOCKADDR*)&ownSock1,sizeof(SOCKADDR)))	//绑定
	{
		MessageBox("单播绑定失败！");
		return FALSE;
	}
	if(SOCKET_ERROR==WSAAsyncSelect(m_sSocket,m_hWnd,UM_SCSOCK,FD_READ))
		//注册单播网络读取事件
	{
		MessageBox("注册单播网络读取事件失败！");
		return FALSE;
	}


	//建立群聊套接字
	m_pubSocket=WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,0);		//采用UDP
	if(INVALID_SOCKET==m_pubSocket)
	{
		MessageBox("创建公聊套接字失败！");
		return FALSE;
	}

	SOCKADDR_IN ownSock2;	
	//BOOL optval=TRUE;

	ownSock2.sin_family=AF_INET;					//设置地址，端口	
	ownSock2.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
	ownSock2.sin_port=htons(55174);

	  //设置该套接字为广播类型，
	setsockopt(m_pubSocket,SOL_SOCKET,SO_BROADCAST,(char FAR *)&optval,sizeof(optval));		//设置该套接字为广播类型

	if(SOCKET_ERROR==bind(m_pubSocket,(SOCKADDR*)&ownSock2,sizeof(SOCKADDR)))	//绑定
	{
		MessageBox("群聊绑定失败！");
		return FALSE;
	}
	if(SOCKET_ERROR==WSAAsyncSelect(m_pubSocket,m_hWnd,UM_PUBSOCK,FD_READ))
		//注册群聊广播网络读取事件
	{
		MessageBox("注册群聊网络读取事件失败！");
		return FALSE;
	}


	//建立私聊套接字
	m_priSocket=WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,0);		//采用UDP
	if(INVALID_SOCKET==m_priSocket)