dnsquerydlg.cpp

DNSQuery,能查询域名是否注册

// DNSQueryDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DNSQuery.h"
#include "DNSQueryDlg.h"
#include <ctype.h>
#include <string.h>
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CDNSQueryDlg dialog

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

void CDNSQueryDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDNSQueryDlg)
	DDX_Text(pDX, IDC_EDIT_QUERY, m_query);
	DDX_Text(pDX, IDC_EDIT_RESULT, m_result);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDNSQueryDlg, CDialog)
	//{{AFX_MSG_MAP(CDNSQueryDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDOK, OnQuery)
	ON_BN_CLICKED(IDQUERY, OnQuery)
	ON_BN_CLICKED(IDEXIT, OnExit)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDNSQueryDlg message handlers

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

	// 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
}

// 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 CDNSQueryDlg::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 CDNSQueryDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CDNSQueryDlg::OnQuery() 
{
	// TODO: Add your control notification handler code here
	hostent *remoteHost;
	CString result;
	char *hostName;
	unsigned int addr;
	UpdateData();
	hostName=m_query.GetBuffer(m_query.GetLength());
	addr=0;
	if (isalpha(hostName[0])) {   /* host address is a name */
		hostName[strlen(hostName)] = '\0'; /* NULL TERMINATED */
		remoteHost = gethostbyname(hostName);
	}
	else  {
		addr = inet_addr(hostName);
		remoteHost = gethostbyaddr((char *) &addr, 4, AF_INET);
	}
	if (WSAGetLastError() != 0) {
		if (WSAGetLastError() == 11001){
			 m_result.Format("没有找到此域名\n");
		} else {
			 m_result.Format("错误#:%ld\n", WSAGetLastError());
		}
	} else {
		if(addr == 0) {
			m_result="";
			m_result+=inet_ntoa (*(struct in_addr *)*remoteHost->h_addr_list); 
		} else {
			m_result.Format("%s",remoteHost->h_name);
		}
	}
	UpdateData(FALSE);

}

void CDNSQueryDlg::OnExit() 
{
	// TODO: Add your control notification handler code here
	SendMessage(WM_CLOSE);
	
}