扫描器0.1源代码.txt

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扫描器0.1源代码
 

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第八军团 时间：2004-1-1 13:09:48 
   
/* this program should be compiled with gcc in linux 
it belongs to www.thysea.com and be programmed by 
blackghost. 
[e-mail] 
*/ 
#include <unistd.h> 
#include <stdlib.h> 
#include <stdio.h> 
#include <string.h> 
#include <sys/types.h> 
#include <sys/socket.h> 
#include <netinet/in.h> 
#include <arpa/inet.h> 
#include <netdb.h> 
/////////////////////// 
struct SPORT{ 
  int min; 
  int max; 
}; 
struct ADDR{ 
  char min[15]; 
  char max[15]; 
} addr_in; 
struct DADDR{ 
  int addr[4]; 
}min,max; 
static int ipcount=0; 
int connecttcp(long addr,int port); 
int cmpip(int * min,int *max); 
int getnextip(); 
int exdtoc(int*a); 

////////////////////// 
int main(int argc,char *argv[]) 
{ 
  struct   SPORT sport; 

    int nsock; 
    long count=0; 
    int cport=0; 
    int l=0; 
    for(;l<4;l++) 
        min.addr[l]=max.addr[l]=0; 
    printf("input the port limitn"); 
    scanf("%d,%d",&sport.min,&sport.max); 
    printf("input the low ip and high ip:n"); 

scanf("%d.%d.%d.%d",&min.addr[0],&min.addr[1],&min.addr[2],&min.addr[3]); 

scanf("%d.%d.%d.%d",&max.addr[0],&max.addr[1],&max.addr[2],&max.addr[3]); 

    //assume min<max!but must be changed afterwards 
    if(cmpip(min.addr,max.addr)>0) 
      { 
                printf("error min>maxn"); 
                exit(0); 
  } 


    while(getnextip()==0) 
    { 
        printf("this is the scan of ip=%sn",addr_in.min); 
      for(cport=sport.min;cport<sport.max;cport++) 
      { 
        if(nsock=connecttcp(inet_addr(addr_in.min),cport)>0) 
        { 

            printf("yeah %d is ok!n",cport); 
            shutdown(nsock,2); 

          } 
      } 

    } 
    printf("scan is over,bye"); 
    exit(0); 

} 
int connecttcp(long addr,int port){ 
  struct sockaddr_in sin; 
  int s; 
  memset(&sin,0,sizeof(sin)); 
  sin.sin_family=AF_INET; 
  sin.sin_port=htons(port); 
  sin.sin_addr.s_addr=addr; 
  s=socket(PF_INET,SOCK_STREAM,0); 
  if(s<0) 
  {     printf("error create socketn"); 
          return -1; 
  } 
  if(connect(s,(struct sockaddr*)&sin,sizeof(sin))<0) 
  { 
      printf("can't connect to %dn",port); 

      return -2; 
  } 
  return s; 
} 
int cmpip(int *min,int *max){ 
  if(min[0]>max[0]) 
      return 1; 
  else 
  { 
      if(min[0]<max[0]) 
          return 0; 
      else 
      { 
          if(min[1]>max[1]) 
              return 1; 
          else 
          { 
              if(min[1]<max[1]) 
                  return 0; 
              else 
              { 
                  if(min[2]>max[2]) 
                      return 1; 
                  else 
                  { 
                      if(min[2]<max[2]) 
                          return 0; 
                      else 
                      { 
                          if(min[3]>max[3]) 
                              return 1; 
                          else 
                                                return 0; 
                                      } 
                  } 
              } 
          } 
      } 
  } 
} 
int getnextip(){ 
  if(min.addr[3]==255) 
  { 
      min.addr[3]=0; 
      if(min.addr[2]==255) 
      { 
          min.addr[2]=0; 
          if(min.addr[1]==255) 
          { 
              min.addr[1]=0; 
              if(min.addr[0]==255) 
              {printf("error too large ip,i can't think it is possible? 
n"); 
                  exit(0); 
              } 
              else 
                  min.addr[0]++; 
          } 
          else 
              min.addr[1]++; 
      } 
      else 
          min.addr[2]++; 
  } 
  else 
      min.addr[3]++; 
  if(cmpip(min.addr,max.addr)>0) 
          { 
          printf("scan over,thank you for use n"); 
          exit(0); 
      } 
  return   exdtoc(min.addr); 
} 
int exdtoc(int* a){ 
      int itmp,dtmp; 
      int i=0,j=0,k=0; 
      char cstack[3]; 
      for(;i<4;i++) 
      { 
      itmp=a;k=0; 
      while(itmp/10!=0){ 
          cstack[k++]=(char)(itmp%10+48); 
          itmp/=10; 
          } 
          cstack[k]=(char)(itmp+48); 
      for(;k>=0;k--) 
          addr_in.min[j++]=cstack[k]; 

      if(i<3) 
          addr_in.min[j++]='.'; 
      } 
      addr_in.min[j]=0; 
      return 0; 
}