tftpsrvdlg.cpp

tftp功能服务器及客户端的实现

// TftpSrvDlg.cpp : implementation file
//

#include "stdafx.h"
#include "TftpSrv.h"
#include "TftpSrvDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

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

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()

/////////////////////////////////////////////////////////////////////////////
// CTftpSrvDlg dialog

CTftpSrvDlg::CTftpSrvDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTftpSrvDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTftpSrvDlg)
		// 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);
	
	RQHead = NULL;
}

void CTftpSrvDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTftpSrvDlg)
	DDX_Control(pDX, IDC_LIST1, m_ListTxt);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTftpSrvDlg, CDialog)
	//{{AFX_MSG_MAP(CTftpSrvDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
	ON_MESSAGE(WM_DATADISPLAY,OnSetDlg)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTftpSrvDlg message handlers

BOOL CTftpSrvDlg::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
	OnSockInit((u_long)INADDR_ANY, 69);
	OnThread();
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CTftpSrvDlg::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 CTftpSrvDlg::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 CTftpSrvDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
//OnSockInit 套接字初始化函数
BOOL CTftpSrvDlg::OnSockInit(u_long ip, u_short port)
{
	 m_Socket = socket(AF_INET,SOCK_DGRAM,0);
	 if(m_Socket == INVALID_SOCKET)
	 {
		MessageBox("socket erro");
		return FALSE;
	 }
	 SOCKADDR_IN Srv_Addr_IN;
	 Srv_Addr_IN.sin_addr.S_un.S_addr = htonl(ip);
	 Srv_Addr_IN.sin_family = AF_INET;
	 Srv_Addr_IN.sin_port = htons(port);
	 
	if(INVALID_SOCKET ==(bind(m_Socket,(SOCKADDR*)&Srv_Addr_IN,sizeof(Srv_Addr_IN))))
	{
		MessageBox("Bind Error!");
		return FALSE;
	}
	return TRUE;
}

//====================================================
//OnThread() 创建负责接收客户端请求连接的线程 RcvMainProc
BOOL CTftpSrvDlg::OnThread()
{
	RcvParam *rcvParam = new RcvParam;
	rcvParam->m_Socket = m_Socket;
	rcvParam->m_hwnd = this->m_hWnd;

	HANDLE handl = CreateThread(NULL,0,RcvMainProc,rcvParam,0,NULL);
	CloseHandle(handl);
	return TRUE;
}
// RcvMainProc 负责接收客户端请求连接的线程 RcvMainProc
//每接收一个尚未存在的客户请求，则创建一个新的进程（RcvProc）负责文件的传输
DWORD WINAPI RcvMainProc(LPVOID Rcvparam)
{
	int retval;
	SOCKET sock = ((RcvParam*)Rcvparam)->m_Socket;
	HWND   hwnd = ((RcvParam*)Rcvparam)->m_hwnd;
	delete Rcvparam;
	SOCKADDR_IN AddrFrom;
	int len = sizeof(AddrFrom);

	RWRQ *RcvMsg = new RWRQ;

	while(1)
	{
		memset(RcvMsg,0,sizeof(RcvMsg));
		retval = recvfrom(sock,(char*)RcvMsg,sizeof(RWRQ),
					0,(SOCKADDR *)&AddrFrom, &len);

		LPARAMSTRUCT *ls = new LPARAMSTRUCT;
		memset(ls,0,sizeof(LPARAMSTRUCT));

		ls->m_TftpHwnd = hwnd;
		ls->pcode = ntohs(RcvMsg->pcode);
		strcpy(ls->fileandmode,RcvMsg->fileandmode);
		ls->Sock_Addr = AddrFrom;
		ls->m_TftpHwnd = hwnd;
		
		if( CTftpSrvDlg::NotExist(RcvMsg->fileandmode,AddrFrom))
		{
			HANDLE handl = CreateThread(NULL,0,RcvProc,(LPVOID)ls,0,NULL);
			CloseHandle(handl);
		}
	}
	return 0;
	
}
//RcvProc 负责文件的传输，该函数是实现多线程的关键
//RcvProc 参数 lpParameter 包含主窗口句柄、请求操作码、
//请求文件和客户端的地址结构
//相关对象 Cexcute ，实现文件传输、差错控制等
DWORD WINAPI RcvProc(LPVOID lpParameter)
{

	u_short pcode = (((LPARAMSTRUCT*)lpParameter))->pcode;
	static i = 0;

	char buf[30]; 
	strcpy(buf,((LPARAMSTRUCT*)lpParameter)->fileandmode);
	pcode = ((LPARAMSTRUCT*)lpParameter)->pcode;
	SOCKADDR_IN RcvAddr ;
	RcvAddr = ((LPARAMSTRUCT*)lpParameter)->Sock_Addr;
	HWND hwnd = ((LPARAMSTRUCT*)lpParameter)->m_TftpHwnd;
	delete lpParameter;

	Cexcute *Exc = new Cexcute(pcode,buf,RcvAddr,hwnd);
	delete Exc;

	return 0;
}

//测试当前线程中是否有相同的请求存在
BOOL  CTftpSrvDlg::NotExist(char * FileName, SOCKADDR_IN &RcvAddr)
{
	//There had a connect in the same Host and refuse to do more transferring,then return True.
	ExistRQ * tmp = new ExistRQ;
	strcpy(tmp->m_File,FileName);
	tmp->m_Port = RcvAddr.sin_port;
	tmp->m_Addr = RcvAddr.sin_addr;
	tmp->next = NULL;
//	AfxMessageBox(tmp->m_File);
	if(RQHead == NULL)
	{
		RQHead = tmp;
		return TRUE;
	}
	else
	{
		ExistRQ *temp = RQHead;
		while(temp != NULL && temp->m_File != NULL)
		{
			if(temp->m_Addr.S_un.S_addr == RcvAddr.sin_addr.S_un.S_addr 
				&& (temp->m_Port == RcvAddr.sin_port))// || //if(strcmp(temp->m_File,FileName) == 0)
			{
				delete tmp;
				return FALSE;
			}
			temp = temp->next;
		}
		tmp->next = RQHead;
		RQHead = tmp;
		return TRUE;
	}
	
}

void CTftpSrvDlg::OnSetDlg(WPARAM wParam,LPARAM lParam)
{
	static ListCount=0;
	CString str = (char*)lParam;
	m_ListTxt.InsertString(ListCount,str);
	ListCount++;
}

BEGIN_EVENTSINK_MAP(CTftpSrvDlg, CDialog)
    //{{AFX_EVENTSINK_MAP(CTftpSrvDlg)
	ON_EVENT(CTftpSrvDlg, IDC_COMMANDBUTTON1, -600 /* Click */, OnClickCommandbutton1, VTS_NONE)
	//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

//路径选择按钮 activX 控件函数
void CTftpSrvDlg::OnClickCommandbutton1() 
{
	// TODO: Add your control notification handler code here
	CString strPath;
	BROWSEINFO bInfo;
	LPITEMIDLIST pidl;
	memset(&bInfo,0,sizeof(bInfo));
	bInfo.hwndOwner = m_hWnd;
	bInfo.ulFlags = BIF_RETURNFSANCESTORS | BIF_RETURNONLYFSDIRS;
	
	if((pidl = SHBrowseForFolder(&bInfo)) == NULL) return ; 

	char temp[MAX_PATH];

	if((SHGetPathFromIDList(pidl,temp)) == NULL)
		return ;
	strPath.Format(temp);
	SetDlgItemText(IDC_EDIT1,strPath);
	
	SetCurrentDirectory(temp);
	
}