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#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <time.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
void msg()
{
printf("EP:scan ip startport endport\nEP:scan ip 127.0.0.1 20 2009\n");
}
int main(int argc,char** argv)
{
char *ip;
int startport,endport,sockfd,i;
struct sockaddr_in to;
float costtime;
clock_t start,end;
if(4!=argc)
{
msg();
return 0;
}
ip=argv[1];
startport=atoi(argv[2]);
endport=atoi(argv[3]);
if(startport<1 || endport>65535 || endport<startport)
{
printf("¶Ë¿Ú·¶Î§³ö´í\n");
return 0;
}
else
printf("IP:%s %d-%d\n",ip,startport,endport);
to.sin_family=AF_INET;
to.sin_addr.s_addr=inet_addr(ip);
start=clock();
for(i=startport;i<=endport;i++)
{
sockfd=socket(AF_INET,SOCK_STREAM,0);
to.sin_port=htons(i);
if(connect(sockfd,(struct sockaddr *)&to,sizeof(struct sockaddr))==0)
{
printf("%s %d\n",ip,i);
close(to);
}
}
end=clock();
costtime=(float)(end-start)/CLOCKS_PER_SEC;
printf("ÓÃʱ:%fÃë\n",costtime);
return 0;
}


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