基于icmp的ping函数

基于icmp的ping端口小程序,与系统自带的ping对比之后 准确率很高

由于是想快速扫描 而非准确扫描 所以很多错误细节没有考虑在内

循环次数还是等待时间都比较低 根据需要可以进行修改

 

cpp文件

 

//////////////////////////////////////////////////////////////////////// Construction/Destruction////////////////////////////////////////////////////////////////////////创建网络环境 以及新建一个socketSOCKET SocketInit(){// 初始化WinSock库WORD wVersionRequested = MAKEWORD(2,2);WSADATA wsaData;if ( WSAStartup( wVersionRequested, &wsaData ) != 0 )return FALSE ;// 创建原始套接字return socket ( AF_INET, SOCK_RAW, IPPROTO_ICMP ) ;}//关闭socket以及关闭网络环境void SocketClose(SOCKET socket){if (socket != INVALID_SOCKET){closesocket (socket) ;}WSACleanup () ;}// 实现PING程序// 参数：目标地址IP字符串，格式如"127.0.0.1"// 判断目标主机是否存活BOOL IcmpPingSource(char* lpDestIp,SOCKET RawSock){// 设置目标地址SOCKADDR_IN DestSockAddr = {0};DestSockAddr.sin_family = AF_INET ;DestSockAddr.sin_addr.s_addr = inet_addr( lpDestIp ) ;DestSockAddr.sin_port = htons(0) ;// 创建ICMP回显请求包(PACK_HAEAD + PACK_DATA)char ICMPPack[ICMP_PACK_SIZE] = {0};PICMP_HEADER pICMPHeader = (PICMP_HEADER)ICMPPack ;pICMPHeader->bType = ICMP_PING_QUERY_TYPE;pICMPHeader->bCode = 0 ;pICMPHeader->nCheckSum = 0;pICMPHeader->nTimeStamp = 0;memset ( &(ICMPPack[ICMP_HEADER_SIZE]), 'E', ICMP_DATA_SIZE ) ;// 填充数据部分，内容任意// 设置接收超时为1秒 在send(),recv()过程中有时由于网络状况等原因，发收不能预期进行,而设置收发时限int nTime = 100;int nret = setsockopt ( RawSock, SOL_SOCKET,SO_SNDTIMEO, (char*)&nTime, sizeof(nTime));if (nret == SOCKET_ERROR){return FALSE;}nret = setsockopt ( RawSock, SOL_SOCKET,SO_RCVTIMEO, (char*)&nTime, sizeof(nTime));if (nret == SOCKET_ERROR){return FALSE;}char szRecvBuf [ DEF_BUF_SIZE] ;SOCKADDR_INSourSockAddr = {0};//快速扫描 只循环4/2次吧for ( int i = 0 ; i < 2; i++ ){pICMPHeader->nCheckSum = 0;// 初始时校验值为0pICMPHeader->nSequence = i;// 序号pICMPHeader->nTimeStamp = GetTickCount() ; // 当前时间// 计算校验值，校验值要在ICMP数据报创建完才能计算pICMPHeader->nCheckSum = GetCheckSum ( (LPBYTE)ICMPPack, ICMP_PACK_SIZE ) ;// 发送ICMP数据包int nRet = ::sendto (RawSock, ICMPPack, ICMP_PACK_SIZE,0,(SOCKADDR*)&DestSockAddr, sizeof(DestSockAddr));if ( nRet == SOCKET_ERROR ){return FALSE ;}// 接收ICMP响应int nLen = sizeof(SourSockAddr);nRet = recvfrom ( RawSock, szRecvBuf, DEF_BUF_SIZE,0,(SOCKADDR*)&SourSockAddr, &nLen);if (nRet == SOCKET_ERROR){if ( (WSAETIMEDOUT == WSAGetLastError()) && (i < (2-1))){::Sleep(100);continue;//如果超时再给一次几乎}return FALSE;}if (SourSockAddr.sin_addr.s_addr == inet_addr(lpDestIp)){//发出去的ip与回显的ip相同才是通的return TRUE;}}return FALSE;}// 计算ICMP包校验值// 参数1：ICMP包缓冲区// 参数2：ICMP包长度USHORT GetCheckSum ( LPBYTE lpBuf, DWORD dwSize ){DWORDdwCheckSum = 0 ;USHORT* lpWord = (USHORT*)lpBuf ;// 累加while ( dwSize > 1 ){dwCheckSum += *lpWord++ ;dwSize -= 2 ;}// 如果长度是奇数if ( dwSize == 1 )dwCheckSum += *((LPBYTE)lpWord) ;// 高16位和低16位相加dwCheckSum = ( dwCheckSum >> 16 ) + ( dwCheckSum & 0xFFFF ) ;// 取反return (USHORT)(~dwCheckSum ) ;}

 

.h文件

#include "Winsock2.h"#pragma comment ( lib, "ws2_32.lib" )#include <windows.h>#include "stdio.h"// 定义默认的缓冲区长度#define DEF_BUF_SIZE1024// 定义IP包头长度#define IP_HEADER_SIZE20// 定义ICMP包头长度#define ICMP_HEADER_SIZE( sizeof(ICMP_HEADER) )// 定义ICMP包实体数据长度#define ICMP_DATA_SIZE32// 定义ICMP包总长度#define ICMP_PACK_SIZE( ICMP_HEADER_SIZE + ICMP_DATA_SIZE )//定义ping数据包类型 (查询)#define ICMP_PING_QUERY_TYPE 8 // 定义ICMP包头typedef struct _ICMP_HEADER {BYTEbType ;// 类型BYTEbCode ;// 代码USHORTnCheckSum ;// 校验和USHORTnSequence ;// 序列号UINTnTimeStamp ;// 可选项，这里为时间，用于计算时间} ICMP_HEADER, *PICMP_HEADER ;// 用于格式化输出信息的缓冲区BOOL IcmpPingSource(char* lpDestIp,SOCKET RawSock);USHORT GetCheckSum ( LPBYTE lpBuf, DWORD dwSize );SOCKET SocketInit();void SocketClose(SOCKET socket);