PORTS SCAN' VC++

// scanner1.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "stdio.h"
#include "resource.h"
#include "winsock.h"
#include <cstdlib>
#include "limits.h"

	  struct hostent       *hs;
      SOCKET               sock;
      SOCKADDR_IN          addr;
	  WSADATA              wsa;
   	  WORD                 wVersionRequested;

     const char foo[] = "Port %d ouvert."; 
	 const char foo2[] = "Port %d fermé.";
	 const char foo3[] = "Host %d inconnu.";
	 const char foo4[] = "Connection sur port %d à échoué.";
	 char *buf; 
      
	 	 char *foobar(int port) 
	   { 
       buf = new char [sizeof(foo) + INT_MAX%10]; 
       sprintf(buf, foo, port); 
       return buf; 
	  }

	    char *foobar2(int port) 
	   { 
       buf = new char [sizeof(foo2) + INT_MAX%10]; 
       sprintf(buf, foo2, port); 
       return buf; 
	  }

	 	 char *foobar3(char *host) 
	   { 
       buf = new char [sizeof(foo3) + INT_MAX%10]; 
       sprintf(buf, foo3, host); 
       return buf; 
	  }
	
		 char *foobar4(int port) 
	   { 
       buf = new char [sizeof(foo4) + INT_MAX%10]; 
       sprintf(buf, foo4, port); 
       return buf; 
	  }

	  BOOL CALLBACK DIALOGProc(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)
	{ 
	int i;
	int openport=0;
	char rhost[30], final[30], b[30], c[30], r[30];
	char *pf, *pf2, *pf3, *shost;
	    switch (uMsg)						
		 {
		case WM_INITDIALOG:
		 case WM_COMMAND:
			 switch (LOWORD(wParam))
			 {
			 case IDCANCEL:
				 EndDialog(hwndDlg,1);
				 break;
			 case IDSTOP:
				 closesocket(sock);
				 break;
			 case IDOK:
				 GetDlgItemText(hwndDlg,IDC_EDIT1, rhost, 65535);
				 GetDlgItemText(hwndDlg, IDC_EDIT2, b, 65535);
                 GetDlgItemText(hwndDlg, IDC_EDIT3, c, 65535);
				 int a = atoi(b);
				 int a2 = atoi(c);

		  wVersionRequested = MAKEWORD( 2, 0 );
          if (WSAStartup(wVersionRequested , &wsa)!=0)
	{
		SendMessage(GetDlgItem(hwndDlg, IDC_LIST3),LB_INSERTSTRING,-1,(LPARAM)(LPCTSTR) "Init. Winsock a échoué." );
		return -1;    
	}
	if ((addr.sin_addr.s_addr=inet_addr(rhost))==-1)
	{
		if ((hs=gethostbyname(rhost))==NULL)
		{
		GetDlgItemText(hwndDlg, IDC_EDIT1, shost, 30);
        pf2 = foobar3(shost);
		SendMessage(GetDlgItem(hwndDlg, IDC_LIST3),LB_INSERTSTRING,-1,(LPARAM)(LPCTSTR) pf2 );
		delete pf2;
			return -1;
		}
		addr.sin_family = hs->h_addrtype;
		memcpy((void *)&addr.sin_addr.s_addr,hs->h_addr,hs->h_length);
	}

	for (i=a2; i < a; i++)
	{

	if ((sock=socket(AF_INET,SOCK_STREAM,0))==INVALID_SOCKET)
	{
	 SendMessage(GetDlgItem(hwndDlg, IDC_LIST3),LB_INSERTSTRING,-1,(LPARAM)(LPCTSTR) "Creation du socket impossible." );
		return -1;
	}

	addr.sin_family     = AF_INET;
	addr.sin_port       = htons(i);

	if (connect(sock,(LPSOCKADDR)&addr,sizeof(addr))==SOCKET_ERROR)
    {
	   pf = foobar2(i);
	   SendMessage(GetDlgItem(hwndDlg, IDC_LIST2),LB_INSERTSTRING,-1,(LPARAM)(LPCTSTR) pf );
	   delete pf;
	   pf3 = foobar4(i);
       SendMessage(GetDlgItem(hwndDlg, IDC_LIST3),LB_INSERTSTRING,-1,(LPARAM)(LPCTSTR) pf3 );
	   delete pf3;
    }
	else{
		itoa(i,r,10);
		pf = foobar(i);
	    SendMessage(GetDlgItem(hwndDlg, IDC_LIST1),LB_INSERTSTRING,-1,(LPARAM)(LPCTSTR) pf );
		delete buf;
		openport++;
	  }
	closesocket(sock);
	}
		 itoa(openport, final,10);
				 SetDlgItemText(hwndDlg, IDC_EDIT6, final);
				 break;
			 }
		 }

		 return false;

	}

	
int WINAPI WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
	int dlg;
    dlg = DialogBox(hInstance,(LPCTSTR)IDD_DIALOG1,NULL,(DLGPROC) DIALOGProc);
	return 0;
}