《计算机网络》课程设计-端口扫描实验.doc

计算机科学与技术学院20082009 学年第 2 学期计算机网络课程设计题目： 端口扫描实验 班级： 学号： 姓名： 教师： 成绩： 目 录1 需求分析31.1 课程设计目的31.2 课程设计内容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。课程设计内容实现一个扫描器，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(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 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，则输入端口范围。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_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;bool 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_cportto;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 testconnection(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;/扫描端口的范围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：#includestdafx.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_initvoid caboutdlg:dodataexchange(cdataexchange* pdx)cdialog:dodataexchange(pdx);/afx_data_map(caboutdlg)/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 require 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_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_mapbegin_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 appendmenu(mf_separator);psysmenu-appendmenu(mf_string, idm_aboutbox, straboutmenu);/ set the icon for this dialog. the 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); 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 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 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);elsecdialog: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 herecstring btntxt,ip;uint nsingleport;byte f1,f2,f3,f4;tchar temp10=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!=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); 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_maxportm_minport) messagebox(_t(您输入的端口范围有误,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(nattemptsetwindowtext(str); str.empty(); bisopen=testconnection(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; /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); 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 herem_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 herecfiledialog* 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(rn0);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 herem_bsingleport=true;m_csingleport.enablewindow();m_cportfrom.enablewindow(false);m_cportto.enablewindow(false);m_cbtnstop.enablewindow(false);