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1、目 录1 需求分析31.1 课程设计目的31.2 课程设计容31.3 课程设计要求32 概要设计32.1 原理概述32.2 运行环境32.3 基本设计思路32.4 功能模块设计33 详细设计33.1 程序流程33.2 主要算法53.3 主要数据结构63.4 主要函数说明64 用户使用手册75 项目分析与总结75.1 项目分析75.2 总结与建议8附录A 源程序代码文件说明8附录B 参考文献201. 需求分析1.1 课程设计目的 加深对TCP/IP的理解，熟悉socket编程。课程设计容实现一个扫描器，使用TCP connect进行端口扫描，并把扫描到的结果记录下来。课程设计要求（1） Wind
2、ows或Linux环境下，程序在单机上运行；（2） 使用端口扫描对一台主机进行扫描，并显示出结果；对一个网段进行IP扫描，显示出结果；（3） 提供友好的用户界面。2. 概要设计2.1 原理概述TCP connect扫描是最基本的扫描，操作系统提供的connect（）系统调用，用来与每一个感兴趣的目标计算机的端口进行连接。如果端口处于侦听状态，那么connect（）就能成功。否则，这个端口是不能用的，即没有提供服务。2.2 运行环境Windows xp，VC+6.02.3 基本设计思路创建一个CSocket套接字，通过CSocket的Connect函数测试该主机的某个端口是否能够连通，获得该端口
3、的打开状态。2.4 功能模块设计（1）测试主机某个端口是否打开；（2）“扫描结果”标题栏；（3）扫描单个或多个端口的单选按钮；（4）“扫描”，“停止”，“保存”按钮。3.详细设计3.1 程序流程开始扫描初始化扫描单个端口？Tm_bSinglePort=true;m_cSinglePort.EnableWindow();m_cPortFrom.EnableWindow(false);m_cPortTo.EnableWindow(false);m_cBtnStop.EnableWindow(false);Fm_bSinglePort=false;m_cSinglePort.EnableWindow
4、(false);m_cPortFrom.EnableWindow();m_cPortTo.EnableWindow();m_cBtnStop.EnableWindow(false);设置端口开始侦听端口有错误？显示结果FT设置下一端口扫描结束3.2 主要算法（1）测试主机某个端口是否打开的函数TestConnection（）：BOOL CMyDlg:TestConnection(CString IP,UINT nPort) CSocket* pSocket;pSocket=new CSocket;ASSERT(pSocket);if (!pSocket-Create() delete pSoc
5、ket;pSocket=NULL;return false;while (!pSocket-Connect(IP,nPort) delete pSocket;pSocket=NULL;return false;pSocket-Close();delete pSocket;return true;（2）响应单选按钮“扫描单个端口”和“扫描多个端口”的单击消息：void CMyDlg:OnRadio1Single() m_bSinglePort=true;m_cSinglePort.EnableWindow();m_cPortFrom.EnableWindow(false);m_cPortTo.E
6、nableWindow(false);m_cBtnStop.EnableWindow(false);void CMyDlg:OnRadio2Range() m_bSinglePort=false;m_cSinglePort.EnableWindow(false);m_cPortFrom.EnableWindow();m_cPortTo.EnableWindow();m_cBtnStop.EnableWindow(false);（3）显示列表框标题栏的成员函数：/增加列表框标题栏的某一列BOOL CMyDlg:AddColumn(LPCTSTR strItem,int nItem,int nSu
7、bItem,int nMask,int nFmt) LV_COLUMN lvc;lvc.mask=nMask;lvc.fmt=nFmt;lvc.pszText=(LPTSTR) strItem;lvc.cx=m_cResult.GetStringWidth(lvc.pszText)+25;if(nMask&LVCF_SUBITEM) if(nSubItem!=-1)lvc.iSubItem=nSubItem;elselvc.iSubItem=nItem;return m_cResult.InsertColumn(nItem,&lvc);/在列表框中加一条BOOL CMyDlg:AddItem(
8、int nItem,int nSubItem,LPCTSTR strItem ,int nImageIndex) LV_ITEM lvItem;lvItem.mask=LVIF_TEXT;lvItem.iItem=nItem;lvItem.iSubItem=nSubItem;lvItem.pszText=(LPTSTR)strItem;if(nImageIndex!=-1) lvItem.mask|=LVIF_IMAGE;lvItem.iImage|=LVIF_IMAGE;if(nSubItem=0)return m_cResult.InsertItem(&lvItem);return m_c
9、Result.SetItem(&lvItem);/加一列标题栏字符void CMyDlg:AddHeader(LPTSTR hdr) if (m_pColumns)m_pColumns-AddTail(hdr);/显示列表框标题栏void CMyDlg:ShowHeaders() int nIndex=0;POSITION pos=m_pColumns-GetHeadPosition();while(pos) CString hdr=(CString)m_pColumns-GetNext(pos);AddColumn(hdr,nIndex+);（4）“扫描”，“停止”，“保存”按钮，见附录程序
10、。3.3 主要数据结构及主要函数说明（1）测试主机某个端口是否打开TestConnection函数；（2）“扫描结果”标题栏成员函数AddHeader，AddColumn，ShowHeaders；在列表框中添加字符串的函数AddItem；（3）扫描单个或多个端口的单选按钮OnRadioSingle()和OnRadioRange()；（4）“扫描”，“停止”，“保存”按钮OnButton1Start()，OnButton2Stop()，OnButton3Save()；4.用户使用手册输入要扫描的主机IP地址，选择“扫描单个端口”或“扫描多个端口”，若选择前者，则输入单个端口号；若选择后者，则输入
11、端口围。再输入扫描次数（默认值为1），单击“扫描”按钮，扫描结果列表框中将会显示所输入端口的扫描结果。单击“停止”时停在那一刻的状态，并显示已扫描的结果。单击“保存”时，可将结果保存在文本文件中。5.项目分析与总结5.1 项目分析扫描单个端口的结果：扫描多个端口：通过观察，主机IP为10.5.104.36的25号端口是打开的。5.2 总结与建议通过这次实验，加深了对端口的理解，也对socket编程有了进一步的认识。实验中遇到许多函数和定义需要上网查阅资料，而且调试的过程也比较困难，需要向同学请教。所以，今后在编程和查阅资料方面的能力有待于进一步去提高。附录A源程序代码文件说明：（1）端口扫描D
12、lg.h：#if !defined(AFX_DLG_H_37F5060C_6D8B_42F0_90D9_FBA754BAD52B_INCLUDED_)#define AFX_DLG_H_37F5060C_6D8B_42F0_90D9_FBA754BAD52B_INCLUDED_#if _MSC_VER 1000#pragma once#endif / _MSC_VER 1000#include #include #include #include #include /扫描结果typedef struct int nAttempts;TCHAR IPAddress16;TCHAR port5;B
13、OOL bStatus; /1 = open , 0 = closeDATA;/ CMyDlg dialogclass CMyDlg : public CDialog/ Constructionpublic:CMyDlg(CWnd* pParent = NULL);/ standard constructor/ Dialog Data/AFX_DATA(CMyDlg)enum IDD = IDD_MY_DIALOG ;CProgressCtrlm_cProgress;CListCtrlm_cResult;CIPAddressCtrlm_cIP;CEditm_cAttempts;CEditm_c
14、PortTo;CEditm_cPortFrom;CEditm_cSinglePort;CButtonm_cBtnStop;CButtonm_cBtnScan;/AFX_DATA/ ClassWizard generated virtual function overrides/AFX_VIRTUAL(CMyDlg)protected:virtual void DoDataExchange(CDataExchange* pDX);/ DDX/DDV support/AFX_VIRTUAL/ Implementationprotected:HICON m_hIcon; BOOL TestConne
15、ction(CString IP, UINT nPort);/测试主机某个端口是否打开void ShowHeaders(void);/显示列表框标题栏void AddHeader(LPTSTR hdr);/增加一列标题栏字符AddItem(int nItem,int nSubItem,LPCTSTR strItem,int nImageIndex=-1);/向m_cResult输出一个结果/ 向输出结构列表控件增加一列BOOL AddColumn(LPCTSTR strItem,int nItem,int nSubItem=-1,int nMask=LVCF_FMT|LVCF_WIDTH|LV
16、CF_TEXT|LVCF_SUBITEM,int nFmt=LVCFMT_LEFT);/ 变量UINT m_nMaxAttempts;/试图连接次数的最大值BOOL m_bSinglePort;/是否只扫描单个端口UINT m_minPort,m_maxPort;/扫描端口的围UINT m_nCounter;/端口的个数CStringList* m_pColumns;/列表框标题栏CPtrList* m_pStatusList;/保存扫描结果的链表/ Generated message map functions/AFX_MSG(CMyDlg)virtual BOOL OnInitDialog
17、();afx_msg void OnSysCommand(UINT nID, LPARAM lParam);afx_msg void OnPaint();afx_msg HCURSOR OnQueryDragIcon();afx_msg void OnButton1Start();afx_msg void OnButton2Stop();afx_msg void OnButton3Save();afx_msg void OnRadio1Single();afx_msg void OnRadio2Range();/AFX_MSGDECLARE_MESSAGE_MAP();/AFX_INSERT_
18、LOCATION/ Microsoft Visual C+ will insert additional declarations immediately before the previous line.#endif / !defined(AFX_DLG_H_37F5060C_6D8B_42F0_90D9_FBA754BAD52B_INCLUDED_)（2）端口扫描Dlg.cpp：#includestdafx.h#include端口扫描.h#include端口扫描Dlg.h#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic cha
19、r THIS_FILE = _FILE_;#endif/ CAboutDlg dialog used for App Aboutclass 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(CDataE
20、xchange* pDX); / DDX/DDV support/AFX_VIRTUAL/ Implementationprotected:/AFX_MSG(CAboutDlg)/AFX_MSGDECLARE_MESSAGE_MAP();CAboutDlg:CAboutDlg() : CDialog(CAboutDlg:IDD)/AFX_DATA_INIT(CAboutDlg)/AFX_DATA_INITvoid CAboutDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CAbou
21、tDlg)/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CAboutDlg, CDialog)/AFX_MSG_MAP(CAboutDlg)/ No message handlers/AFX_MSG_MAPEND_MESSAGE_MAP()/ CMyDlg dialogCMyDlg:CMyDlg(CWnd* pParent /*=NULL*/): CDialog(CMyDlg:IDD, pParent)/在对话框的构造函数中初始化成员变量/AFX_DATA_INIT(CMyDlg)/AFX_DATA_INIT/ Note that LoadIcon does not requi
22、re a subsequent DestroyIcon in Win32m_hIcon = AfxGetApp()-LoadIcon(IDR_MAINFRAME); m_pColumns=new CStringList; ASSERT(m_pColumns); m_bSinglePort=true; m_nMaxAttempts=1; m_pStatusList=new CPtrList; ASSERT(m_pStatusList); void CMyDlg:DoDataExchange(CDataExchange* pDX) CDialog:DoDataExchange(pDX);/AFX_
23、DATA_MAP(CMyDlg)DDX_Control(pDX, IDC_PROGRESS1, m_cProgress);DDX_Control(pDX, IDC_LIST1, m_cResult);DDX_Control(pDX, IDC_IPADDRESS1, m_cIP);DDX_Control(pDX, IDC_EDIT4_ATTEMPTS, m_cAttempts);DDX_Control(pDX, IDC_EDIT3_SINGLE_PORT_TO, m_cPortTo);DDX_Control(pDX, IDC_EDIT2_SINGLE_PORT_FROM, m_cPortFrom
24、);DDX_Control(pDX, IDC_EDIT1_SINGLE_PORT, m_cSinglePort);DDX_Control(pDX, IDC_BUTTON2_STOP, m_cBtnStop);DDX_Control(pDX, IDC_BUTTON1_START, m_cBtnScan);/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CMyDlg, CDialog)/AFX_MSG_MAP(CMyDlg)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_BUTTON1_STA
25、RT, OnButton1Start)ON_BN_CLICKED(IDC_BUTTON2_STOP, OnButton2Stop)ON_BN_CLICKED(IDC_BUTTON3_SAVE, OnButton3Save)ON_BN_CLICKED(IDC_RADIO1_SINGLE, OnRadio1Single)ON_BN_CLICKED(IDC_RADIO2_RANGE, OnRadio2Range)/AFX_MSG_MAPEND_MESSAGE_MAP()/ CMyDlg message handlersBOOL CMyDlg:OnInitDialog()/设置按钮的初始状态和列表框的
26、风格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 AppendMenu(MF_SEPARATOR);pSysMenu-AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);/ Set the icon for this dialog. The
27、framework does this automatically/ when the applications main window is not a dialogSetIcon(m_hIcon, TRUE);/ Set big iconSetIcon(m_hIcon, FALSE);/ Set small icon/ TODO: Add extra initialization here/给列表框加标题栏 AddHeader(_T(IP地址); / 加一列标题栏字符 AddHeader(_T(端口号); AddHeader(_T(端口状态); AddHeader(_T(尝试连接次数);
28、AddHeader(_T(标记); ShowHeaders(); /设置扫描单个端口 CheckRadioButton(IDC_RADIO1_SINGLE,IDC_RADIO2_RANGE,IDC_RADIO1_SINGLE); /设置控件的默认状态 m_cSinglePort.EnableWindow();m_cPortFrom.EnableWindow(false); m_cPortTo.EnableWindow(false); m_cBtnStop.EnableWindow(false); m_cAttempts.SetWindowText(_T(1);return TRUE; / re
29、turn TRUE unless you set the focus to a controlvoid CMyDlg: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 ico
30、n. For MFC applications using the document/view model,/ this is automatically done for you by the framework.void CMyDlg:OnPaint() if (IsIconic()CPaintDC dc(this); / device context for paintingSendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);/ Center icon in client rectangleint cxIcon = Ge
31、tSystemMetrics(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 icondc.DrawIcon(x, y, m_hIcon);elseCDialog:OnPaint();/ The system calls this to obtain the cursor to display
32、while the user drags/ the minimized window.HCURSOR CMyDlg:OnQueryDragIcon() return (HCURSOR) m_hIcon;void CMyDlg:OnButton1Start() /“扫描”按钮 / TODO: Add your control notification handler code hereCString btnTxt,IP;UINT nSinglePort;BYTE f1,f2,f3,f4;TCHAR temp10=0; m_cProgress.SetPos(0); m_cResult.Delete
33、AllItems(); POSITION p=m_pStatusList-GetHeadPosition(); while(p) POSITION temp=p; DATA* pNode=(DATA*)m_pStatusList-GetNext(p); m_pStatusList-RemoveAt(temp); if (pNode)/pNode!=null delete pNode; if(m_cIP.IsBlank() MessageBox(请输入主机IP地址); return; if(m_cIP.GetAddress(f1,f2,f3,f4)4) MessageBox(请输入有效的IP地址
34、); return; IP=_itoa(f1,temp,10); IP+=_T(.); IP+=_itoa(f2,temp,10); IP+=_T(.); IP+=_itoa(f3,temp,10); IP+=_T(.); IP+=_itoa(f4,temp,10); m_cBtnStop.EnableWindow(); m_cBtnScan.EnableWindow(false); if(m_bSinglePort) CString port; m_cSinglePort.GetWindowText(port); m_minPort=m_maxPort=nSinglePort=atoi(po
35、rt); else CString port1,port2; m_cPortFrom.GetWindowText(port1); m_cPortTo.GetWindowText(port2); m_minPort=atoi(port1); m_maxPort=atoi(port2); m_cProgress.SetRange32(0,m_maxPort-m_minPort+1); m_cProgress.SetStep(1); if (!m_bSinglePort&m_maxPortm_minPort) MessageBox(_T(您输入的端口围有误,请重新输入); return; UINT
36、m_nMaxAttempts=GetDlgItemInt(IDC_EDIT4_ATTEMPTS); for(m_nCounter=m_minPort;m_nCounter=m_maxPort;m_nCounter+) BOOL bIsOpen=false; UINT nAttempt=1; while(nAttemptSetWindowText(str); str.Empty(); bIsOpen=TestConnection(IP,m_nCounter); if(bIsOpen) DATA* pNode=new DATA; ASSERT(pNode); strcpy(pNode-IPAddr
37、ess,IP.GetBuffer(IP.GetLength(); strcpy(pNode-port,_itoa(m_nCounter,temp,10); pNode-bStatus = 1; /open pNode-nAttempts=nAttempt; m_pStatusList-AddTail(pNode); nAttempt+; if (!bIsOpen) DATA* pNode=new DATA; ASSERT(pNode); strcpy(pNode-IPAddress,IP.GetBuffer(IP.GetLength(); strcpy(pNode-port,_itoa(m_nCounter,temp,10); pNode-bStatus=0; /close pNode-nAttempts=nAttempt-1; m_pStatusList-AddTail(pNode); MSG message; if (:PeekMessage(&message,NULL,0,0,PM_REMOVE) :TranslateMessage(&message); :DispatchMessage(&message
