enumdlg.cpp

通过程序可以枚举同一局域网内的所有主机

// EnumDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Enum.h"
#include "EnumDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CEnumDlg dialog

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

void CEnumDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEnumDlg)
	DDX_Control(pDX, IDC_LIST, m_List);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEnumDlg, CDialog)
	//{{AFX_MSG_MAP(CEnumDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_ENUM, OnButtonEnum)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEnumDlg message handlers

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

void CEnumDlg::OnButtonEnum() 
{
	// TODO: Add your control notification handler code here
	m_List.ResetContent();
    GetDlgItem(IDC_BUTTON_ENUM)->EnableWindow(FALSE);	

	EnumHost();

    GetDlgItem(IDC_BUTTON_ENUM)->EnableWindow(TRUE);
}

void CEnumDlg::EnumHost()
{
	//声明变量
	hostent *pHostent;
	struct in_addr ia;
    //获得本机IP	
	pHostent=gethostbyname("");
	if(pHostent==NULL)
	{
		m_List.AddString("获取本机信息失败");
		return;
	}
	else
	{
		//获得主机名
        CString strInfo=pHostent->h_name;
		strInfo+="->";        
		//获得IP地址
		memcpy(&ia.s_addr,pHostent->h_addr_list[0],pHostent->h_length);
		strInfo+=inet_ntoa(ia);
		strInfo+="\r\n";
		m_List.AddString(strInfo);
	}	

    GetOtherHostInfo(&ia);

}

void CEnumDlg::GetOtherHostInfo(struct in_addr *pia)
{
	for(unsigned char i=1;i<=10;i++)
	{
		pia->S_un.S_un_b.s_b4=i;
	
    	hostent *pHostent;
    	pHostent=gethostbyaddr((char*)pia,sizeof(pia),AF_INET);
    	if(pHostent==NULL)
		{
	    	continue;
		}
    	else
		{
	    	//获得主机名
            CString strInfo=pHostent->h_name;
		    strInfo+="->";        
	    	//获得IP地址
	    	memcpy(&(pia->s_addr),pHostent->h_addr_list[0],pHostent->h_length);
	    	strInfo+=inet_ntoa(*pia);
	    	strInfo+="\r\n";
	    	m_List.AddString(strInfo);
		}
	}
}