pingdlg.cpp

C++编程实践与技巧一书各章节的源码

// pingDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ping.h"
#include "pingDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

typedef struct PingIPINFO
{
	u_char Ttl;				// Time To Live
	u_char Tos;				// Type Of Service
	u_char IPFlags;			// IP flags
	u_char OptSize;			// Size of options data
	u_char FAR *Options;	// Options data buffer
}IPINFO;

typedef IPINFO* PIPINFO;

typedef struct PingICMPECHO
{
	u_long Source;			// Source address
	u_long Status;			// IP status
	u_long RTTime;			// Round trip time in milliseconds
	u_short DataSize;		// Reply data size
	u_short Reserved;		// Unknown
	void FAR *pData;		// Reply data buffer
	IPINFO	ipInfo;			// Reply options
}ICMPECHO;

typedef ICMPECHO* PICMPECHO;

HANDLE (WINAPI *pIcmpCreateFile)(VOID);
BOOL (WINAPI *pIcmpCloseHandle)(HANDLE);
DWORD (WINAPI *pIcmpSendEcho)
(HANDLE,DWORD,LPVOID,WORD,PIPINFO,LPVOID,DWORD,DWORD);
HANDLE hndlIcmp;			// LoadLibrary() handle to ICMP.DLL
BOOL bValid; // if it doesn't construct properly, it won't be valid
void IniIcmp();
bool begin(char *);
ICMPECHO icmpEcho;			// ICMP Echo reply buffer
struct in_addr DestAddr;		// Internet address structure
LPHOSTENT pHost;			// Pointer to host entry structure
DWORD *dwAddress;			// IP Address
IPINFO ipInfo;				// IP Options structure
HANDLE hndlFile;			// Handle for IcmpCreateFile()

WSADATA wsaData;			// WSADATA
int nRet;					// General use return code

//////
/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CPingDlg dialog

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

void CPingDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CPingDlg)
	DDX_Control(pDX, IDC_LIST2, m_list);
	DDX_Text(pDX, IDC_EDIT1, m_host);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CPingDlg, CDialog)
	//{{AFX_MSG_MAP(CPingDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BEGIN, OnBegin)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPingDlg message handlers

BOOL CPingDlg::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
	m_list.InsertColumn(0,"Reply from",LVCFMT_LEFT,130,-1);
	m_list.InsertColumn(1,"Time(ms)",LVCFMT_LEFT,71,-1);
	m_list.InsertColumn(2,"TTL",LVCFMT_LEFT,71,-1);
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CPingDlg::OnBegin() 
{
	IniIcmp();
    bool PingMark;
	char host[100];
	memset(host,0,100);
	this->UpdateData(true);
	strcpy(host,m_host);
	PingMark=begin(host);
	if(PingMark==true)
	{
	
		int ItemTemp;
		char temp[100];
		ItemTemp=m_list.InsertItem(0,inet_ntoa(DestAddr));
		_itoa(icmpEcho.RTTime,temp,10);
		m_list.SetItemText(ItemTemp,1,temp);
		_itoa(icmpEcho.ipInfo.Ttl,temp,10);
		m_list.SetItemText(ItemTemp,2,temp);
	}
	else
		AfxMessageBox("目的主机不可达");
}


void IniIcmp()
{
	bValid = FALSE;
	// Dynamically load the ICMP.DLL
	hndlIcmp = LoadLibrary("ICMP.DLL");
	if (hndlIcmp == NULL)
	{
		::MessageBox(NULL, "Could not load ICMP.DLL", "Error:", MB_OK);
		return;
	}
	// Retrieve ICMP function pointers
	pIcmpCreateFile  = (HANDLE (WINAPI *)(void))
		GetProcAddress((HMODULE)hndlIcmp,"IcmpCreateFile");
	pIcmpCloseHandle = (BOOL (WINAPI *)(HANDLE))
		GetProcAddress((HMODULE)hndlIcmp,"IcmpCloseHandle");
	pIcmpSendEcho = (DWORD (WINAPI *)
		(HANDLE,DWORD,LPVOID,WORD,PIPINFO,LPVOID,DWORD,DWORD))
		GetProcAddress((HMODULE)hndlIcmp,"IcmpSendEcho");
	// Check all the function pointers
	if (pIcmpCreateFile == NULL		|| 
		pIcmpCloseHandle == NULL	||
		pIcmpSendEcho == NULL)
	{
		::MessageBox(NULL, "Error loading ICMP.DLL", "Error:", MB_OK);
		FreeLibrary((HMODULE)hndlIcmp);
		return;
	}

	// Init WinSock
	nRet = WSAStartup(0x0101, &wsaData );
    if (nRet)
    {
		::MessageBox(NULL, "WSAStartup() error:", "Error:", MB_OK);
        WSACleanup();
		FreeLibrary((HMODULE)hndlIcmp);
        return;
    }
    // Check WinSock version
    if (0x0101 != wsaData.wVersion)
    {
		::MessageBox(NULL, "No WinSock version 1.1 support found", "Error:", MB_OK);
        WSACleanup();
		FreeLibrary((HMODULE)hndlIcmp);
        return;
    }
	bValid = TRUE;
}

bool begin(char* strHost)
{

    if(!bValid)
	{
		return FALSE;
	}

	// Lookup destination
    // Use inet_addr() to determine if we're dealing with a name
    // or an address
    DestAddr.s_addr = inet_addr(strHost);
    if (DestAddr.s_addr == INADDR_NONE)
        pHost = gethostbyname(strHost);
    else
        pHost = gethostbyaddr((const char *)&DestAddr, 
                        sizeof(struct in_addr), AF_INET);
	if (pHost == NULL)
	{
		return FALSE;
	}

	// Copy the IP address
	dwAddress = (DWORD *)(*pHost->h_addr_list);

	// Get an ICMP echo request handle        
	hndlFile = pIcmpCreateFile();

	// Set some reasonable default values
	ipInfo.Ttl = 255;
	ipInfo.Tos = 0;
	ipInfo.IPFlags = 0;
	ipInfo.OptSize = 0;
	ipInfo.Options = NULL;
	icmpEcho.Status = 0;
	// Reqest an ICMP echo
	pIcmpSendEcho(
		hndlFile,		// Handle from IcmpCreateFile()
		*dwAddress,		// Destination IP address
		NULL,			// Pointer to buffer to send
		0,				// Size of buffer in bytes
		&ipInfo,		// Request options
		&icmpEcho,		// Reply buffer
		sizeof(struct PingICMPECHO),
		1000);			// Time to wait in milliseconds
	// Print the results
	DestAddr.s_addr = icmpEcho.Source;
	if (icmpEcho.Status)
	{
		return FALSE;
	}

	// Close the echo request file handle
	pIcmpCloseHandle(hndlFile);
	return TRUE;
}