#include "stdafx.h"
#include <windows.h> 
#include <winsock.h> 
#include <stdio.h> 

#define REMOTE_S "127.0.0.1" 

void WSAInit(void) 
 { 
  WORD wVersionReg = MAKEWORD(1, 1); 
  WSADATA wsaData; 
  if (int err = WSAStartup(wVersionReg, &wsaData) != 0) 
   { 
    puts("Fehler: Initialisieren - WinSock.dll!"); 
   } 
 } 

int main(void) 
 { 
  SOCKET sock = INVALID_SOCKET; 

  int pstart = 0, pend = 0, i, contr; 

  struct sockaddr_in server; 

  server.sin_addr.s_addr = inet_addr(REMOTE_S); 
  server.sin_family = AF_INET; 

  WSAInit(); 

  printf("\n\tEnter Port to start with: "); 
  scanf("%d", &pstart); 

  printf("\n\tEnter Port to stop: "); 
  scanf("%d", &pend); 

  for (i = pstart; i < (pend+1); i++) 
   { 
    server.sin_port = htons(i); 

    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) 
     { 
      puts("Fehler beim Erstellen des Socket!\n"); 
     } 

    contr = connect(sock, (sockaddr *) &server ,sizeof(server)); 

    if (contr < 0) printf("\n\tPort %d closed", i); 
    else printf("\n\t### Port %d open ###", i); 

    closesocket(sock); 
   } 

  WSACleanup(); 

  return 0; 
 }