validi~2.cpp

visual c++ 时尚编程百例 全部源代码

// ValidIPTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ValidIPTest.h"
#include "ValidIPTestDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CValidIPTestDlg dialog

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

void CValidIPTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CValidIPTestDlg)
	DDX_Control(pDX, IDC_NETWORKID, m_ctrlNetworkID);
	DDX_Control(pDX, IDC_MASK, m_ctrlMask);
	DDX_Control(pDX, IDC_IP, m_ctrlIP);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CValidIPTestDlg, CDialog)
	//{{AFX_MSG_MAP(CValidIPTestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_TEST, OnTest)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CValidIPTestDlg message handlers

BOOL CValidIPTestDlg::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
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CValidIPTestDlg::OnTest() 
{
    DWORD dwIP,dwMask,dwNetworkID;
	//取得用户输入的IP地址
	m_ctrlIP.GetAddress(dwIP);
	//取得掩码数据
	m_ctrlMask.GetAddress(dwMask);
    //取得网络ID值
	m_ctrlNetworkID.GetAddress(dwNetworkID);

	//如果IP和掩码数据按位做与操作，结果不等于网络ID
	//则说明该IP地址是无效的
/*
	if ((dwIP & dwMask) != dwNetworkID)
	{
		AfxMessageBox("这是一个无效的IP地址，因为该IP地址和掩码按位与后不等于网络ID");
		return;
	}
*/
	//将掩码数据取反，根据得到结果中1的个数和位置
	//就知道IP地址中主机ID有几位，在哪些位置上

	DWORD dw = ~dwMask;
	//如果主机位全是1，则这个IP地址是无效的。
	if ((dw & dwIP) == dw)
	{
		AfxMessageBox("这是一个无效的IP地址，因为主机位全是1");
		return;
	}

	//如果主机位全是0，则这个IP地址是无效的
    if ((dw & dwIP) == 0)
	{
		AfxMessageBox("这是一个无效的IP地址，因为主机位全是0");
		return;
	}
	
	//另外，每个网段的开始和结束的那段IP也是无效的
	DWORD dwStart1,dwEnd1,dwStart2,dwEnd2;
	//计算本网段开始一段的无效IP地址范围
	dwStart1 = dwNetworkID + 0;
	dwEnd1   = dwNetworkID + dw;

	//计算本网段结束一段的无效IP地址
	DWORD dwBase;
	if (dw < 0x100)
	{
		dwBase = (0x100 -1) & ~dw;
	}
	else if (dw >= 0x100 && dw < 0x10000)
	{
		dwBase = (0x10000 -1) & ~dw;
	}
	else if (dw >= 0x10000 && dw < 0x1000000)
	{
		dwBase = (0x1000000 -1) & ~dw;
	}
	else
	{
		//因为A、B、C、D、E五类网址的掩码最高位都是255
		//因此dw不可能比0x1000000大的
		AfxMessageBox("指定的掩码数据是错误的");
		return;
	}

	dwStart2 = dwNetworkID + dwBase;
	dwEnd2   = dwNetworkID + dwBase + dw;

	//判断给定的IP是否在这两个范围之内，如果在则是无效的
	if ((dwIP >= dwStart1 && dwIP <= dwEnd1)||
		(dwIP >= dwStart2 && dwIP <= dwEnd2))
	{
		AfxMessageBox("给定的IP地址是无效的,每个网段的最开始的那段和结束的那段IP都不可以使用");
		return;
	}

	AfxMessageBox("这是一个合法的IP地址");

   	
}

void CValidIPTestDlg::OnButton1() 
{
	CDialog::OnCancel();	
}