计算机网络课程设计++端口扫描++实验报告材料

目录1 需求分析 (3)1.1 课程设计目的 (3)1.2 课程设计容 (3)1.3 课程设计要求 (3)2 概要设计 (3)2.1 原理概述 (3)2.2 运行环境 (3)2.3 基本设计思路 (3)2.4 功能模块设计 (3)3 详细设计 (3)3.1 程序流程 (3)3.2 主要算法 (5)3.3 主要数据结构 (6)3.4 主要函数说明 (6)4 用户使用手册 (7)5 项目分析与总结 (7)5.1 项目分析 (7)5.2 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 (20)1.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）Windows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 pSocket;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.EnableWindow(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 nSubItem,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(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_cResult.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。

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Dlg.h：#if !defined(AFX_DLG_H__37F5060C_6D8B_42F0_90D9_FBA754BAD52B__INCLUDE D_)#define AFX_DLG_H__37F5060C_6D8B_42F0_90D9_FBA754BAD52B__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000#include <fcntl.h>#include <sys/types.h>#include <sys/stat.h>#include <io.h>#include <afxsock.h>//扫描结果typedef struct{ int nAttempts;TCHAR IPAddress[16];TCHAR port[5];BOOL bStatus; //1 = open , 0 = close}DATA;/////////////////////////////////////////////////////////////////////////////// CMyDlg dialogclass CMyDlg : public CDialog{// Constructionpublic:CMyDlg(CWnd* pParent = NULL); // standard constructor// Dialog Data//{{AFX_DATA(CMyDlg)enum { IDD = IDD_MY_DIALOG };CProgressCtrl m_cProgress;CListCtrl m_cResult;CIPAddressCtrl m_cIP;CEdit m_cAttempts;CEdit m_cPortTo;CEdit m_cPortFrom;CEdit m_cSinglePort;CButton m_cBtnStop;CButton m_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 T estConnection(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|LVCF_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();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_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：#include"stdafx.h"#include"端口扫描.h"#include"端口扫描Dlg.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char 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(CDataExchange* 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_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_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 require a subsequent DestroyIcon in Win32 m_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_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);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_MAP}BEGIN_MESSAGE_MAP(CMyDlg, CDialog)//{{AFX_MSG_MAP(CMyDlg)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_BUTTON1_START, 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 < 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 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"));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; // return TRUE unless you set the focus to a control}void 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 icon. 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 = 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 icondc.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 CMyDlg::OnQueryDragIcon(){ return (HCURSOR) m_hIcon;}void CMyDlg::OnButton1Start() //“扫描”按钮{ // TODO: Add your control notification handler code here CString btnTxt,IP;UINT nSinglePort;BYTE f1,f2,f3,f4;TCHAR temp[10]="\0";m_cProgress.SetPos(0);m_cResult.DeleteAllItems();POSITION p=m_pStatusList->GetHeadPosition(); while(p){POSITION temp=p;DATA* pNode=(DATA*)m_pStatusList->GetNext(p);m_pStatusList->RemoveAt(temp);if (pNode)//pNode!=nulldelete 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");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(port);} 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_maxPort<m_minPort){MessageBox(_T("您输入的端口围有误,请重新输入"));return;}UINT m_nMaxAttempts=GetDlgItemInt(IDC_EDIT4_ATTEMPTS);for(m_nCounter=m_minPort;m_nCounter<=m_maxPort;m_nCounter++) {BOOL bIsOpen=false;UINT nAttempt=1;while(nAttempt<=m_nMaxAttempts && !bIsOpen){TCHAR temp[10]="\0";CString str=_T("尝试连接端口：");str+=itoa(m_nCounter,temp,10);str+=_T(", IP地址为=");str+=IP;str+=_T(", 尝试次数为=");str+=itoa(nAttempt,temp,10);CStatic* pStatic=(CStatic*)GetDlgItem(IDC_STATIC_STATUS);pStatic->SetWindowText(str);str.Empty();bIsOpen=T estConnection(IP,m_nCounter);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 = 1; //openpNode->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; //closepNode->nAttempts=nAttempt-1;m_pStatusList->AddTail(pNode);}MSG message;if (::PeekMessage(&message,NULL,0,0,PM_REMOVE)){::TranslateMessage(&message);::DispatchMessage(&message);}m_cProgress.StepIt();}CStatic* pStatic=(CStatic*)GetDlgItem(IDC_STATIC_STATUS);pStatic->SetWindowText((CString)_T("当前扫描状态"));m_cBtnScan.EnableWindow();m_cBtnStop.EnableWindow(false);UINT nIndex=0;POSITION pos=m_pStatusList->GetHeadPosition();while(pos){ DATA* pNode=(DATA*)m_pStatusList->GetNext(pos);AddItem(nIndex,0,pNode->IPAddress);AddItem(nIndex,1,pNode->port);if (pNode->bStatus){ AddItem(nIndex,2,_T("Open"));AddItem(nIndex,4,_T("*"));}else{ AddItem(nIndex,2,_T("Close"));AddItem(nIndex,4,_T(" "));}AddItem(nIndex++,3,_itoa(pNode->nAttempts,temp,10));}}void CMyDlg::OnButton2Stop() //“停止”按钮{ // TODO: Add your control notification handler code here m_nCounter=m_maxPort+1;m_cBtnStop.EnableWindow(false);m_cBtnScan.EnableWindow();CStatic* pStatic=(CStatic*)GetDlgItem(IDC_STATIC_STATUS);pStatic->SetWindowText((CString)_T("当前扫描状态"));}void CMyDlg::OnButton3Save() //“保存”按钮{// TODO: Add your control notification handler code here CFileDialog* pDlg=new CFileDialog(FALSE,_T("txt"),NULL,OFN_OVERWRITEPROMPT |OFN_EXPLORER | OFN_LONGNAMES,_T("Scanned ports files (*.txt)"),this);ASSERT(pDlg);if (pDlg->DoModal()==IDOK){int nHandle,retVal;nHandle=_open(pDlg->GetPathName(),_O_BINARY|_O_CREAT|_O_TRUNC|_O_ RDWR);if (nHandle==-1){MessageBox(_T("Unable to open output file to write."),_T("Error"),MB_OK|MB_ICONEXCLAMATION);delete pDlg;return;}POSITION pos=m_pStatusList->GetHeadPosition();while(pos){CString buffer;DATA* pNode=(DATA*)m_pStatusList->GetNext(pos);buffer=pNode->IPAddress;buffer+=_T(',');buffer+=pNode->port;buffer+=_T(',');if (pNode->bStatus)buffer+=_T("Open");elsebuffer+=_T("Close");buffer+=_T("\r\n\0");retVal=_write(nHandle,(void*)buffer.GetBuffer(buffer.GetLength()),buffer.GetLength());if (retVal!=buffer.GetLength()){MessageBox(_T("An error occured while writing records."), _T("Error"),MB_OK | MB_ICONEXCLAMATION);delete pDlg;return;}buffer.Empty();}_close(nHandle);}delete pDlg;}void CMyDlg::OnRadio1Single(){// TODO: Add your control notification handler code here m_bSinglePort=true;m_cSinglePort.EnableWindow();m_cPortFrom.EnableWindow(false);m_cPortTo.EnableWindow(false);m_cBtnStop.EnableWindow(false);}void CMyDlg::OnRadio2Range(){ // TODO: Add your control notification handler code here m_bSinglePort=false;m_cSinglePort.EnableWindow(false);m_cPortFrom.EnableWindow();m_cPortTo.EnableWindow();m_cBtnStop.EnableWindow(false);}//测试主机的某个端口是否打开BOOL CMyDlg::TestConnection(CString IP,UINT nPort){ CSocket* pSocket;pSocket=new CSocket;ASSERT(pSocket);if (!pSocket->Create()){delete pSocket;pSocket=NULL;return false;}while (!pSocket->Connect(IP,nPort)){delete pSocket;pSocket=NULL;return false;}pSocket->Close();delete pSocket;return true;}//增加列表框标题栏的某一列BOOL CMyDlg::AddColumn(LPCTSTR strItem,int nItem,int nSubItem,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(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_cResult.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++);}}附录B参考文献：Visual C++ 实效编程百例（第二版）人民邮电。