【文件属性】：
文件名称：发现网络中的活动主机
文件大小：6KB
文件格式：CPP
更新时间：2012-01-11 07:39:43
C程序
#pragma pack(4)
//#include "stdafx.h"
#pragma comment (lib,"Ws2_32.lib")
#define WIN32_LEAN_AND_MEAN
#include
#include
#include
#include
#include
#include
#include
typedef struct iphdr
{
unsigned int headlen:4;
unsigned int version:4;
unsigned char tos;
unsigned short totallen;
unsigned short id;
unsigned short falg;
unsigned char ttl;
unsigned char prot;
unsigned short checksum;
unsigned int sourceIP;
unsigned int destIP;
}IpHeader;
typedef struct icmphdr
{
BYTE type;
BYTE code;
USHORT checksum;
USHORT id;
USHORT seg;
}IcmpHeader;
#define ICMP_RCHO 8
#define ICMP_RCHO_REPLY 0
#define ICMP_MIN 8
#define STATUS_FAILED 0xFFFF
#define DEF_PACKET_SIZE 32
#define MAX_PACKET 1024
#define MAX_PING_PACKET_SIZE (MAX_PACKET+sizeof(IpHeader))
void fill_icmp_data(char *,int);
USHORT checksum(USHORT *,int);
void decode_resp(char *,int,struct sockaddr_in *);
DWORD WINAPI FindIP(LPVOID pIPAddrTemp);
WSADATA wsaData;
SOCKET sockRaw;
struct sockaddr_in dest,from,end;
int fromlen =sizeof(from);
char *recvbuf=new char[MAX_PING_PACKET_SIZE];
unsigned int addr=0;
long ThreadNumCounter=0,ThreadNumLimit=20;
long *aa=&ThreadNumCounter;
void main(int argc,char *argv[])
{
/*if(argc!=3)
{
cout<<"输入格式错误: start_ip end_ip"<ThreadNumLimit)
{
Sleep(5000);
continue;
}
DWORD ThreadID;
sockaddr_in *pIPAddrTemp=new (sockaddr_in);
if(!pIPAddrTemp)
{
cout<<"memory alloc failed"<type=ICMP_RCHO;
icmp_hdr->id=(USHORT)GetCurrentThreadId();
datapart=icmp_data+sizeof(IcmpHeader);
memset(datapart,'A',datasize-sizeof(IcmpHeader));
}
void decode_resp(char *buf,int bytes,struct sockaddr_in *from)
{
IpHeader *iphdr;
IcmpHeader *icmphdr;
unsigned short iphdrlen;
iphdr=(IpHeader*) buf;
iphdrlen=iphdr->headlen*4;
icmphdr=(IcmpHeader *)(buf+iphdrlen);
if(bytestype!=ICMP_RCHO_REPLY)return;
if(icmphdr->id!=(USHORT)GetCurrentThreadId())return;
cout<<"活动主机: "<sin_addr)<1)
{
cksum+=*buffer++;
size-=sizeof(USHORT);
}
if(size)
{
cksum+=*(UCHAR*)buffer;
}
cksum=(cksum>>16)+(cksum& 0xffff);
cksum+=(cksum>>16);
return (USHORT)(~cksum);
}
DWORD WINAPI FindIP(LPVOID pIPAddrTemp)
{
InterlockedIncrement(aa);
char icmp_data[MAX_PACKET];
memset(icmp_data,0,MAX_PACKET);
int datasize=DEF_PACKET_SIZE;
datasize+=sizeof(IcmpHeader);
fill_icmp_data(icmp_data,datasize);
((IcmpHeader*)icmp_data)->checksum=0;
((IcmpHeader*)icmp_data)->seg=0;
((IcmpHeader*)icmp_data)->checksum=checksum((USHORT*)icmp_data,datasize);
int bwrote=sendto(sockRaw,icmp_data,datasize,0,(struct sockaddr *)pIPAddrTemp,sizeof(dest));
int n=0;
if(bwrote==SOCKET_ERROR)
{
if(WSAGetLastError()==WSAETIMEDOUT)
{
cout<<"timed out"<
