DWORD WINAPI ThreadProc(LPVOID lParam) {  CInitSock initSock;    HWND hWnd = (HWND)lParam; //从参数得到句柄  char szIp[64] ={0};  ::GetDlgItemTextA(hWnd, IDC_IP, szIp, sizeof(szIp)); //从控件得到ip地址  //1. 创建协议类型为IPPROTO_ICMP的原始套接字，设置套接字属性  SOCKET sRaw = ::socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);  SetTimeOut(sRaw, 1000, TRUE),

  。

 //2.创建并初始化ICMP封包  char buff[sizeof(ICMP_HDR)+32] = {0};  ICMP_HDR* pIcmp = (ICMP_HDR*)buff;  pIcmp->icmp_type = 8;  pIcmp->icmp_code = 0;  pIcmp->icmp_checksum = 0;  pIcmp->icmp_id = (USHORT)::GetCurrentProcessId();  pIcmp->icmp_sequence = 0;  pIcmp->icmp_timestamp = 0;  //填充数据  memset(&buff[sizeof(ICMP_HDR)], 'E', 32),

 //开始发送和接收封包  USHORT nSeq = 0;  SOCKADDR_IN dest;  dest.sin_family = AF_INET;  dest.sin_port = htons(0);  dest.sin_addr.S_un.S_addr = inet_addr(szIp); //inet_addr("192.168.19.63"); //inet_addr(szIp);220.181.111.147  CString strToShow="";  char* pszRevBuf = new char[1024]; //[1024] = {0};  memset(pszRevBuf, 0, 1024);  SOCKADDR_IN from;  int nFromLen= sizeof(from);  while (TRUE)  {   //3. 调用sendto发送ICMP请求   static int nCount=0;   if (nCount++==4)   {    break;   }   pIcmp->icmp_checksum = checksum((USHORT*)buff, sizeof(ICMP_HDR)+32);   pIcmp->icmp_sequence = ++nSeq;   pIcmp->icmp_timestamp = ::GetTickCount();   int nRet;   nRet = ::sendto(sRaw, buff, sizeof(ICMP_HDR)+32, 0, (SOCKADDR*)&dest, sizeof(dest));   if (nRet == SOCKET_ERROR)   {    int nError = ::WSAGetLastError();    strToShow += "sendto error\r\n";    return -1;   }      //4. 调用recvfrom接受ICMP响应   nRet = ::recvfrom(sRaw, pszRevBuf, 1024, 0, (sockaddr*)&from, &nFromLen);   if (nRet == SOCKET_ERROR)   {    if (::WSAGetLastError() == WSAETIMEDOUT)    {     strToShow += "timeout\r\n";     continue;    }    strToShow += "recvfrom error\r\n";    return -1;   }   //解析接收到的ICMP包   int nTick = ::GetTickCount();   if (nRet < sizeof(ICMP_HDR)+sizeof(IPHeader))   {    strToShow += "less byte recved..\r\n";   }   ICMP_HDR* pRecvIcmp = (ICMP_HDR*)(pszRevBuf + sizeof(IPHeader));// 跳过IP头   if (pRecvIcmp->icmp_type != 0)   {    strToShow += "不是回显类型";    return -1;   }   if (pRecvIcmp->icmp_id != ::GetCurrentProcessId())   {    strToShow += "不是本进程的回显包\r\n";    return -1;   }   CString strTemp;   strTemp.Format("收到来自于[%s]IP的%04d字节\r\n", inet_ntoa(from.sin_addr), nRet);   strToShow += strTemp,

  strTemp = "";   strTemp.Format("序列号:%d\r\n", pRecvIcmp->icmp_sequence);   strToShow += strTemp,

  strTemp = "";   strTemp.Format("花费时间:%d\r\n", nTick - pRecvIcmp->icmp_timestamp);  }  strToShow += "**********************************";  ::SetDlgItemTextA(hWnd, IDC_DATA, strToShow);  return 0; } 。

USHORT checksum(USHORT* buff, int nSize) //222.89.166.13 {  unsigned long cksum=0;  //将数据以字为单位加到cksum  while (nSize > 1)  {   cksum += *buff++;   nSize -= sizeof(USHORT);  } 。

  。

 //如果为奇数, 将最后一个字扩展到双字，再累加  if (nSize)  {   cksum += *(UCHAR*)buff;  }  //将cksum的高16位与低16位相加，取反后得到校验和  cksum = (cksum>>16) + (cksum & 0xffff);  cksum += (cksum>>16);  return (USHORT)(~cksum); } BOOL SetTimeOut(SOCKET s, int nTime, BOOL bRecv) {  int ret = ::setsockopt(s, SOL_SOCKET, bRecv?SO_RCVTIMEO:SO_SNDTIMEO, (char*)&nTime, sizeof(nTime));  return ret!=SOCKET_ERROR; } typedef struct icmp_hdr {  unsigned char icmp_type;  unsigned char icmp_code;  unsigned short icmp_checksum;  //下面是回显头  unsigned short icmp_id;  unsigned short icmp_sequence;  unsigned long icmp_timestamp; }ICMP_HDR, *PICMP_HDR,

typedef struct _IPHeader {  UCHAR iphVerLen;  UCHAR ipTOS;  USHORT ipLength;  USHORT ipID;  USHORT ipFlag;  UCHAR ipTTL;  UCHAR ipProtocol;  USHORT ipCheckSum;  ULONG ipSource;  ULONG ipDestination; }IPHeader, *PIPHeader,