dnswatchdlg.cpp

监控dns的程序

//
// DNSWatchDlg.cpp : implementation file
//  Bill Nolde   [e-mail] BillCo Systems 2002 version 1.1
//

#include "stdafx.h"
#include "DNSWatch.h"
#include "DNSWatchDlg.h"
#include <winsock2.h>
#include <MSTcpIP.h>
#include "IPStructs.h"
#include "ipadddel.h"

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

UINT  DoRawListen(void *pptr);
int GetDNSName(char *lpDNSName, char *DottedName);

#define MAXPACKETSIZE  1600
#define SELECTARRAYSIZE 200

extern CDNSWatchDlg *MYdlg;


int		hSHandle;
//CString	szMsg;
BOOLEAN	IsListening			= FALSE;
bool	DoBeep				= true;
/////////////////////////////////////////////////////////////////////////////
// CDNSWatchDlg dialog

CDNSWatchDlg::CDNSWatchDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDNSWatchDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDNSWatchDlg)
	m_status = _T("");
	m_number_received = 0;
	m_save_filename = _T("");
	m_save_file_text = _T("");
	m_total_requests = 0;
	m_append_box = FALSE;
	//}}AFX_DATA_INIT
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDNSWatchDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDNSWatchDlg)
	DDX_Control(pDX, IDC_COMBO1, m_ip_address_box);
	DDX_Control(pDX, IDC_EDIT5, m_total_requests_ctrl);
	DDX_Control(pDX, IDC_BUTTON5, m_beep_button);
	DDX_Control(pDX, IDC_EDIT3, m_number_received_ctrl);
	DDX_Control(pDX, IDC_LIST2, m_dns_name_list);
	DDX_Text(pDX, IDC_EDIT2, m_status);
	DDX_Text(pDX, IDC_EDIT3, m_number_received);
	DDX_Text(pDX, IDC_EDIT4, m_save_filename);
	DDX_Text(pDX, IDC_STATIC1, m_save_file_text);
	DDX_Text(pDX, IDC_EDIT5, m_total_requests);
	DDX_Check(pDX, IDC_CHECK1, m_append_box);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDNSWatchDlg, CDialog)
	//{{AFX_MSG_MAP(CDNSWatchDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnStartButton)
	ON_BN_CLICKED(IDC_BUTTON2, OnStopButton)
	ON_BN_CLICKED(IDC_BUTTON4, OnSaveListButton)
	ON_BN_CLICKED(IDC_BUTTON5, OnBeepButton)
	ON_BN_CLICKED(IDC_BUTTON3, OnAboutButton)
	ON_BN_CLICKED(IDC_BUTTON6, OnResetButton)
	ON_BN_CLICKED(IDC_BUTTON7, OnSaveSelectedButton)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDNSWatchDlg message handlers

BOOL CDNSWatchDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here

char szMsg[120];
struct WSAData 	zWSAData ;

int	rc = WSAStartup ( 0x0101 , &zWSAData );
	if ( rc ) {
		if ( rc == WSASYSNOTREADY ) wsprintf ( szMsg , "Drivers Not Loaded!!" );
		else 		wsprintf ( szMsg , "Start up Error %d", rc );
		MessageBox (szMsg, "Winsock Init Error",MB_OK);
		return 1;
	}	
	char windir[64];
	GetEnvironmentVariable("windir",windir,64);

	m_save_filename = "\\temphosts";
	m_number_received = 0;
	m_total_requests  = 0;
	UpdateData(FALSE);	

ip_entry iptable[100];		//Table of strucures containing IP addresses and subnet masks

	int	nNumberOfIPs = GetAllIPAddresses( &iptable[0],100);	
	for (int i=0; i< nNumberOfIPs; i++)
		m_ip_address_box.AddString (iptable[i].ip_address);	
	m_ip_address_box.SetCurSel(0);


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

// 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 CDNSWatchDlg::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();
	}
}

HCURSOR CDNSWatchDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
//--------------------------------------------------------------
void CDNSWatchDlg::OnOK() 
{
	// TODO: Add extra validation here
	
	CDialog::OnOK();
}
//--------------------------------------------------------------
void CDNSWatchDlg::OnStartButton() 
{
UINT (AFX_CDECL *MyThread)(LPVOID);

#define IP_HDRINCL          2  /* header is included with data */
int rc;
struct sockaddr_in      sa_in;
DWORD   dwBytesReturned=0;
DWORD   dwBufferLen;
ULONG rcvall = 1;
int on       = 1; 
CString	szMsg;

	if (IsListening == TRUE) {
		MessageBeep(100);
		return;
	}

	UpdateData(TRUE);
	m_status.Empty();

	hSHandle  = WSASocket ( AF_INET, SOCK_RAW , 0 , NULL,0,WSA_FLAG_OVERLAPPED );
	if ( hSHandle == SOCKET_ERROR ) {
		szMsg.Format("socket() failed, errno=%d", WSAGetLastError());
		MessageBox(szMsg,"socket",MB_OK);
		return;
	}
//	int bufsize = 32000;
//	rc = setsockopt(hSHandle,IPPROTO_RAW, SO_RCVBUF  ,(char*)&bufsize,sizeof(int)); 
//	if ( rc == SOCKET_ERROR )	{
//		szMsg.Format("SetSockOpt RECVBUSSIZE Failed eroro = %d", GetLastError());
//		closesocket(hSHandle);
//		MessageBox(szMsg,"setsockopt",MB_OK);
//		return;
//	}
	sa_in.sin_family      = AF_INET;
	sa_in.sin_port        = 0;
	CString csIP;
	int nDx	= m_ip_address_box.GetCurSel();
	m_ip_address_box.GetLBText(nDx,csIP);

	sa_in.sin_addr.s_addr = inet_addr(csIP);

	rc = bind ( hSHandle, (struct sockaddr *) &sa_in , sizeof( sa_in ) );
	if ( rc == SOCKET_ERROR ) {
		rc = WSAGetLastError();
		if ( rc != WSAEINPROGRESS ) {
			szMsg.Format( "bind() failed, errno=%d", rc );
			MessageBox(szMsg,"BIND",MB_OK);
			closesocket ( hSHandle );
			return;
		}
	}		
	rc = WSAIoctl(hSHandle, SIO_RCVALL, &rcvall, sizeof(ULONG), &dwBufferLen, 
					sizeof(dwBufferLen),&dwBytesReturned, NULL, NULL);
	if ( rc == SOCKET_ERROR )  {
		rc = WSAGetLastError();
		if ( rc != WSAEINPROGRESS ) {
			szMsg.Format("Ioctl() failed, errno=%d\n", rc );
			MessageBox (szMsg, "Network Ioctl",MB_OK);
		}
	}
	
	IsListening = TRUE;
	m_status.Format("Initialization OK Up and listening...");
	MyThread = (DoRawListen);		
	 AfxBeginThread (MyThread  , NULL );
	UpdateData(FALSE);
	
}
//---------------------------------------------------------------
void CDNSWatchDlg::OnStopButton() 
{
	UpdateData(TRUE);
	closesocket ( hSHandle );
	m_status = "Not Listening";
	UpdateData(FALSE);
	IsListening = FALSE;	
}
//----------------------------------------------------------------
void CDNSWatchDlg::AddName(CString name_to_add)
{
char iTemp[32]; 

	itoa(++m_total_requests,iTemp,10);
	m_total_requests_ctrl.SetWindowText(iTemp);

	int	nDx = m_dns_name_list.FindStringExact (0, name_to_add);
	if ( nDx != LB_ERR ) return;		//already in list

	m_dns_name_list.AddString(name_to_add);
	itoa(++m_number_received,iTemp,10);
	m_number_received_ctrl.SetWindowText(iTemp);

}
//---------------------------------------------------------------
UINT  DoRawListen(void *pptr)
{
#define DNSPORT 53
#define MAXDNSNAMESIZE 1024

struct sockaddr saddr;
int rc,fromlen=sizeof(struct sockaddr);
PIPHEADER iphdr;
char buf[MAXPACKETSIZE],add_name[MAXDNSNAMESIZE];
CString	szMsg;

	while(1) {

		if (IsListening == FALSE) break;
		rc = recvfrom( hSHandle ,buf,MAXPACKETSIZE,NULL, &saddr, &fromlen);
		if ( rc == SOCKET_ERROR ) {
			rc = WSAGetLastError();
			if ( rc != WSAEINPROGRESS ) {
				szMsg.Format("recvfrom() failed, error =%d", rc );
				return 1;;
			}
		}
// Your Filter goes here. Don't do too much processing,
// or you may drop packets
		iphdr = (PIPHEADER) buf;
		int dsnport = htons(DNSPORT);
		if ((iphdr->UDP_src_port == dsnport)  ||
			(iphdr->UDP_DEST_port  == dsnport))	{
			if (DoBeep ==true) MessageBeep(5000);
			GetDNSName(&iphdr->data[12], add_name);
			MYdlg->AddName(add_name);
		}
	}
	closesocket ( hSHandle );
	AfxEndThread(0);
	return 0;  
}
//------------------------------------------------------------
//This is code I ripped out af anothe application I did. The format of
// the DNS name in the request packet is in the form of 
//length followed by the name. a Zero length denotes end of DNS name
//------------------------------------------------------------
int GetDNSName(char *lpDNSName, char *DottedName)
{
int tot_len, len;
char *ptr1, *ptr2;

	ptr1    = lpDNSName;
	ptr2    = DottedName;
	*ptr2   = 0;
	if ( *ptr1 == 0 ) return 0;
	tot_len = 0;
	while ( 1 ) {
		if ( *ptr1 == 0 ) break;
		len = (int) *ptr1++;
		tot_len += len+1;
		for (int i=0; i<len; i++) 
			*ptr2++ = *ptr1++;
		*ptr2++ = '.';
	}
	*ptr2--;
	*ptr2  = 0;
	return tot_len+1;
}
//--------------------------------------------------------------------------
void CDNSWatchDlg::OnSaveListButton() 
{
	UpdateData(TRUE);
	if (IsListening == TRUE) {
		m_status = "Stop Listening first";
		UpdateData(FALSE);
		return;
	}

	if ( m_save_filename.IsEmpty() == TRUE) {
		MessageBeep(10);
		m_status = "No File Name";
		UpdateData(FALSE);
		return;
	}
	int count = m_dns_name_list.GetCount(); 
	int sel_array[SELECTARRAYSIZE];
	for (int i=0; i<count;i++) sel_array[i] = i;
	int rc = SaveNames(count, sel_array);
	if (rc ==0)
		m_status = "File Saved";
	else
		m_status = "Error Saving file";
	UpdateData(FALSE);

}
//--------------------------------------------------------------------------
int CDNSWatchDlg::SaveNames ( int nbr_to_save, int save_index[] )
{
FILE *fh;
int rc,count;

CString ctemp;

	UpdateData(TRUE);
	if (m_append_box == TRUE)
		 fh = fopen (m_save_filename,"a+");
	else fh = fopen (m_save_filename,"w");

	if ( fh == NULL ) return 1;		//No default param file


	count = m_dns_name_list.GetCount();
	for (int i=0; i<nbr_to_save; i++ ){ 
		m_dns_name_list.GetText(save_index[i], ctemp);
		ctemp = "127.0.0.1   " + ctemp + "\n";		//create hosts entry
		rc = fwrite (ctemp,1,ctemp.GetLength(),fh);	
	}
	fclose (fh );
	return 0;
}
//-------------------------------------------------------------------
void CDNSWatchDlg::OnBeepButton() 
{
	if ( DoBeep == true ) {
		m_beep_button.SetWindowText ("No Beep");
		DoBeep = false;
	}
	else {
		m_beep_button.SetWindowText ("Beep");
		DoBeep = true;
	}		
	
}
//-------------------------------------------------------------------
void CDNSWatchDlg::OnAboutButton() 
{
CString zMsg=	"                         Bill Nolde \n"
				"                    BillCo Systems 2001\n"
				"                    [e-mail]\n"
				"               DNS Watcher Application 1.2\n";
	MessageBox(zMsg, "Another one of Mr. Bill's network programs",MB_OK);	
}
//---------------------------------------------------------
void CDNSWatchDlg::OnResetButton() 
{
	m_save_filename = "C:\\temphosts";
	m_number_received = 0;
	m_total_requests  = 0;
	m_dns_name_list.ResetContent();
	UpdateData(FALSE);

}
//---------------------------------------------------------
void CDNSWatchDlg::OnSaveSelectedButton() 
{
int sel_array[SELECTARRAYSIZE],count = m_dns_name_list.GetSelCount(); 
		m_dns_name_list.GetSelItems(100,sel_array);

	int rc = SaveNames(count, sel_array);
	if (rc ==0)
		m_status = "File Saved";
	else
		m_status = "Error Saving file";
	UpdateData(FALSE);
	
}
//---------------------------------------------------------