實(shí)驗(yàn)三(ICMPPing協(xié)議)

1、實(shí)驗(yàn)三 一、 實(shí)驗(yàn)名稱：ICMP協(xié)議Ping程序?qū)崿F(xiàn)二、 實(shí)驗(yàn)?zāi)康膶W(xué)習(xí)ICMP協(xié)議原理, 并掌握在其協(xié)議上進(jìn)行Ping程序開發(fā)的方法.三、 實(shí)驗(yàn)要求查找資料, 寫出Ping程序原理并編寫程序, 寫出主要使用到的API函數(shù).四、 實(shí)驗(yàn)內(nèi)容Ping原理:ping的原理就是首先建立通道，然后發(fā)送包，對方接受后返回信息，這個(gè)包至少包括以下內(nèi)容，發(fā)送的時(shí)候，包的內(nèi)容包括對方的ip地址和自己的地址，還有序列數(shù)，回送的時(shí)候包括雙方地址，還有時(shí)間等，主要是接受方在都是在操作系統(tǒng)內(nèi)核里做好的，時(shí)刻在監(jiān)聽，提供一段c程序的代碼，希望對大家有用。向遠(yuǎn)程計(jì)算機(jī)通過ICMP協(xié)議發(fā)送特定的數(shù)據(jù)包，然后等待回應(yīng)并接收返回的

2、數(shù)據(jù)包 ，對每個(gè)接收的數(shù)據(jù)包均根據(jù)傳輸?shù)南⑦M(jìn)行驗(yàn)證。默認(rèn)情況下，傳輸四個(gè)包含 32 字節(jié) 數(shù)據(jù)（由字母組成的一個(gè)循環(huán)大寫字母序列）的回顯數(shù)據(jù)包。過程如下： （1）通過將 ICMP 回顯數(shù)據(jù)包發(fā)送到計(jì)算機(jī)并偵聽回顯回復(fù)數(shù)據(jù)包來驗(yàn)證與一臺(tái)或多臺(tái)遠(yuǎn)程計(jì)算機(jī)的連接。 （2）每個(gè)發(fā)送的數(shù)據(jù)包最多等待一秒。（3）打印已傳輸和接收的數(shù)據(jù)包數(shù)。主要API函數(shù):#include "stdafx.h"#include "ping.h"#include "pingDlg.h"#include <winsock.h>#ifdef _DEBUG#

3、define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endifextern SOCKET m_socket;BOOL ping(const char *ipaddr, char *resp);class CAboutDlg : public CDialogpublic:CAboutDlg();enum IDD = IDD_ABOUTBOX ;protected:virtual void DoDataExchange(CDataExchange* pDX); / DDX/DDV supportprotected:

4、DECLARE_MESSAGE_MAP();CAboutDlg:CAboutDlg() : CDialog(CAboutDlg:IDD)void CAboutDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)END_MESSAGE_MAP()CPingDlg:CPingDlg(CWnd* pParent /*=NULL*/): CDialog(CPingDlg:IDD, pParent)m_Ctx = _T("");m_

5、hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);void CPingDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);DDX_Control(pDX, IDC_IPADDRESS1, m_IP);DDX_Text(pDX, IDC_EDIT1, m_Ctx);DDX_Text(pDX, IDC_EDIT_NUM, m_Num);BEGIN_MESSAGE_MAP(CPingDlg, CDialog)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_

6、WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_OK, OnOk)ON_BN_CLICKED(IDC_START, OnStart)END_MESSAGE_MAP()BOOL CPingDlg:OnInitDialog()CDialog:OnInitDialog();SetIcon(m_hIcon, TRUE);/ Set big iconSetIcon(m_hIcon, FALSE);/ Set small iconm_IP.SetWindowText("127.0.0.1");intres;inttimeout = 100;WSADATA wsa

7、Data;if(WSAStartup( MAKEWORD( 1, 0 ), &wsaData ) != 0)MessageBox("Window Socket 初始化失敗!");return FALSE;/創(chuàng)建SOCKET / AF_INET：協(xié)議族為TCP/IP/SOCK_RAW：原始方式（直接與IP層交換數(shù)據(jù)）/IPPROTO_ICMP：子協(xié)議類型m_socket = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);if(m_socket = INVALID_SOCKET)MessageBox("創(chuàng)建 Socket 失敗

8、!");return FALSE;/ 設(shè)置選項(xiàng)：接受超時(shí)為100msres = setsockopt(m_socket,SOL_SOCKET,SO_RCVTIMEO,(char*)&timeout,sizeof(timeout);if(res = SOCKET_ERROR)MessageBox("設(shè)置接受超時(shí)為100ms 失敗!");timeout = 1000;/ 設(shè)置發(fā)送超時(shí)為1000msres = setsockopt(m_socket,SOL_SOCKET,SO_SNDTIMEO,(char*)&timeout,sizeof(timeout

9、);if(res = SOCKET_ERROR)MessageBox("設(shè)置發(fā)送超時(shí)為100ms 失敗!");return TRUE; / return TRUE unless you set the focus to a controlvoid CPingDlg:OnOK() void CPingDlg:OnCancel() void CPingDlg:OnSysCommand(UINT nID, LPARAM lParam)if (nID & 0xFFF0) = IDM_ABOUTBOX)CAboutDlg dlgAbout;dlgAbout.DoModal()

10、;elseCDialog:OnSysCommand(nID, lParam);void CPingDlg: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);

11、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();HCURSOR CPingDlg:OnQueryDragIcon()return (HCURSOR) m_hIcon;void CPingDlg:OnOk() CDialog:OnOK();BOOL CPingDlg:DestroyWin

12、dow() closesocket(m_socket);WSACleanup ();return CDialog:DestroyWindow();void CPingDlg:OnStart() charipaddr32;charresp4096;UINTn,ok = 0;floatloss;UpdateData(TRUE);if(m_Num <= 0)return;m_IP.GetWindowText(ipaddr,30);sprintf(resp,"rnping %s.rn",ipaddr);AppendMsg(resp);for(n = 0; n < m_Num; n+)if(ping(ipaddr,resp)ok+;AppendMsg(resp);Sleep(1000);if(ok = 0)loss = 100.0f;elseloss = 100.0f - float(n * 100.0f / ok);sprintf(resp,"rnPing %s 的統(tǒng)計(jì)結(jié)果:rnt發(fā)送 = %d 接收 = %d 丟失 = %.2f",ipaddr,n,ok,loss);AppendMsg(resp);void CPingDlg:AppendMsg(