httppacketdlg.cpp

本文件中包含的是《VC编程100例》一书中的源代码

// HttpPacketDlg.cpp : implementation file
//

#include "stdafx.h"
#include "HttpPacket.h"
#include "HttpPacketDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CHttpPacketDlg dialog

CHttpPacketDlg::CHttpPacketDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CHttpPacketDlg::IDD, pParent)
{
	//设置默认超时时间为3秒，收到和丢失的包都为0
	//{{AFX_DATA_INIT(CHttpPacketDlg)
	m_nPackLost = 0;
	m_nPackRecv = 0;
	m_nTimeOut = 3000;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CHttpPacketDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CHttpPacketDlg)
	DDX_Text(pDX, IDC_PACKLOST, m_nPackLost);
	DDX_Text(pDX, IDC_PACKRECV, m_nPackRecv);
	DDX_Text(pDX, IDC_TIMEOUT, m_nTimeOut);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CHttpPacketDlg, CDialog)
	//{{AFX_MSG_MAP(CHttpPacketDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_CLEAR, OnClear)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CHttpPacketDlg message handlers

BOOL CHttpPacketDlg::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 CHttpPacketDlg::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 CHttpPacketDlg::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 CHttpPacketDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CHttpPacketDlg::OnOK() 
{
	// TODO: Add extra validation here
	//从对话框得到超时等相关数据
	UpdateData(TRUE);

	//从注册表中读取网卡名
	//得到现有的网络适配器的列表和它们的描述
	char AdapterName[2048] = {0};
	ULONG AdapterLength = 2048;
	if(!PacketGetAdapterNames(AdapterName, &AdapterLength))
	{
		MessageBox("读取网卡名失败");
		exit(1);
	}

	//打开网卡
	m_lpAdapter = PacketOpenAdapter(AdapterName);
	if(m_lpAdapter == NULL)
	{
		MessageBox("OpenFailed");
		PacketCloseAdapter(m_lpAdapter);
		exit(1);
	}

	//设置网卡为混杂模式
	if(!PacketSetHwFilter(m_lpAdapter,NDIS_PACKET_TYPE_PROMISCUOUS))
	{
		MessageBox("设置网卡模式失败");
		PacketCloseAdapter(m_lpAdapter);
		exit(1);
	}


	//设置缓冲区的大小
	long int dim = 1024*16;
	if(!PacketSetBuff(m_lpAdapter,dim))
	{
		MessageBox("分配缓冲区失败");
		PacketCloseAdapter(m_lpAdapter);
		exit(1);
	}

	//设置一次读操作返回的超时时间
	if(!PacketSetReadTimeout(m_lpAdapter, m_nTimeOut))
	{
		MessageBox("设置超时失败");
		PacketCloseAdapter(m_lpAdapter);
		exit(1);
	}

	//为_PACKET结构分配内存。
	LPPACKET lpPacket = PacketAllocatePacket();
	if(lpPacket == NULL)
	{
		MessageBox("为_PACKET结构分配内存失败");
		PacketCloseAdapter(m_lpAdapter);
		exit(1);
	}

	//初始化一个_PACKET结构，即将packet结构中的buffer设置为传递的buffer指针。
	char cTemp[1024*16]={0};
	PVOID Buffer = cTemp;
	PacketInitPacket(lpPacket, Buffer, 1024*16);


	//开启计时器，捕获时间为1秒
	m_nTimer = SetTimer(1, 1000, NULL);
	
	//从NPF driver上读取数据（Packets或者统计信息）。
	if(!PacketReceivePacket(m_lpAdapter, lpPacket, NULL))
	{
		MessageBox("读取数据失败");
		PacketCloseAdapter(m_lpAdapter);
		exit(1);
	}
}

void CHttpPacketDlg::OnClear() 
{
	// TODO: Add your control notification handler code here
	m_nPackLost = 0;
	m_nPackRecv = 0;
	m_nTimeOut = 3000;
	UpdateData(FALSE);
}

void CHttpPacketDlg::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	//从NPF driver上读取数据（Packets或者统计信息）。

	//得到当前捕获进程的统计信息。
	struct bpf_stat s;
	s.bs_recv = 0;
	if(!PacketGetStats(m_lpAdapter, &s))
	{
		MessageBox("捕获进程的统计信息失败");
		PacketCloseAdapter(m_lpAdapter);
		exit(1);
	}

	//关闭网卡。
	PacketCloseAdapter(m_lpAdapter);
	m_nPackRecv = s.bs_recv;
	m_nPackLost = s.bs_drop;
	
	//将数据发送到对话框
	UpdateData(FALSE);

	//关闭计时器，提示捕获结束
	KillTimer(m_nTimer);
	MessageBox("捕获过程结束", "完成", MB_OK);
}