nmap/mswin32/winfix.cc

/***************************************************************************
 * winfix.cc -- A few trivial windows-compatabilty-related functions that  *
 * are specific to Nmap.  Most of this has been moved into nbase so it can *
 * be shared.                                                              *
 *                                                                         *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2004 Insecure.Com LLC. Nmap       *
 * is also a registered trademark of Insecure.Com LLC.  This program is    *
 * free software; you may redistribute and/or modify it under the          *
 * terms of the GNU General Public License as published by the Free        *
 * Software Foundation; Version 2.  This guarantees your right to use,     *
 * modify, and redistribute this software under certain conditions.  If    *
 * you wish to embed Nmap technology into proprietary software, we may be  *
 * willing to sell alternative licenses (contact sales@insecure.com).      *
 * Many security scanner vendors already license Nmap technology such as  *
 * our remote OS fingerprinting database and code, service/version         *
 * detection system, and port scanning code.                               *
 *                                                                         *
 * Note that the GPL places important restrictions on "derived works", yet *
 * it does not provide a detailed definition of that term.  To avoid       *
 * misunderstandings, we consider an application to constitute a           *
 * "derivative work" for the purpose of this license if it does any of the *
 * following:                                                              *
 * o Integrates source code from Nmap                                      *
 * o Reads or includes Nmap copyrighted data files, such as                *
 *   nmap-os-fingerprints or nmap-service-probes.                          *
 * o Executes Nmap and parses the results (as opposed to typical shell or  *
 *   execution-menu apps, which simply display raw Nmap output and so are  *
 *   not derivative works.)                                                * 
 * o Integrates/includes/aggregates Nmap into a proprietary executable     *
 *   installer, such as those produced by InstallShield.                   *
 * o Links to a library or executes a program that does any of the above   *
 *                                                                         *
 * The term "Nmap" should be taken to also include any portions or derived *
 * works of Nmap.  This list is not exclusive, but is just meant to        *
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 * These restrictions only apply when you actually redistribute Nmap.  For *
 * example, nothing stops you from writing and selling a proprietary       *
 * front-end to Nmap.  Just distribute it by itself, and point people to   *
 * http://www.insecure.org/nmap/ to download Nmap.                         *
 *                                                                         *
 * We don't consider these to be added restrictions on top of the GPL, but *
 * just a clarification of how we interpret "derived works" as it applies  *
 * to our GPL-licensed Nmap product.  This is similar to the way Linus     *
 * Torvalds has announced his interpretation of how "derived works"        *
 * applies to Linux kernel modules.  Our interpretation refers only to     *
 * Nmap - we don't speak for any other GPL products.                       *
 *                                                                         *
 * If you have any questions about the GPL licensing restrictions on using *
 * Nmap in non-GPL works, we would be happy to help.  As mentioned above,  *
 * we also offer alternative license to integrate Nmap into proprietary    *
 * applications and appliances.  These contracts have been sold to many    *
 * security vendors, and generally include a perpetual license as well as  *
 * providing for priority support and updates as well as helping to fund   *
 * the continued development of Nmap technology.  Please email             *
 * sales@insecure.com for further information.                             *
 *                                                                         *
 * As a special exception to the GPL terms, Insecure.Com LLC grants        *
 * permission to link the code of this program with any version of the     *
 * OpenSSL library which is distributed under a license identical to that  *
 * listed in the included Copying.OpenSSL file, and distribute linked      *
 * combinations including the two. You must obey the GNU GPL in all        *
 * respects for all of the code used other than OpenSSL.  If you modify    *
 * this file, you may extend this exception to your version of the file,   *
 * but you are not obligated to do so.                                     *
 *                                                                         *
 * If you received these files with a written license agreement or         *
 * contract stating terms other than the terms above, then that            *
 * alternative license agreement takes precedence over these comments.     *
 *                                                                         *
 * Source is provided to this software because we believe users have a     *
 * right to know exactly what a program is going to do before they run it. *
 * This also allows you to audit the software for security holes (none     *
 * have been found so far).                                                *
 *                                                                         *
 * Source code also allows you to port Nmap to new platforms, fix bugs,    *
 * and add new features.  You are highly encouraged to send your changes   *
 * to fyodor@insecure.org for possible incorporation into the main         *
 * distribution.  By sending these changes to Fyodor or one the            *
 * Insecure.Org development mailing lists, it is assumed that you are      *
 * offering Fyodor and Insecure.Com LLC the unlimited, non-exclusive right *
 * to reuse, modify, and relicense the code.  Nmap will always be          *
 * available Open Source, but this is important because the inability to   *
 * relicense code has caused devastating problems for other Free Software  *
 * projects (such as KDE and NASM).  We also occasionally relicense the    *
 * code to third parties as discussed above.  If you wish to specify       *
 * special license conditions of your contributions, just say so when you  *
 * send them.                                                              *
 *                                                                         *
 * This program is distributed in the hope that it will be useful, but     *
 * WITHOUT ANY WARRANTY; without even the implied warranty of              *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU       *
 * General Public License for more details at                              *
 * http://www.gnu.org/copyleft/gpl.html , or in the COPYING file included  *
 * with Nmap.                                                              *
 *                                                                         *
 ***************************************************************************/

/* $Id: */

#include <winclude.h>
#include <sys/timeb.h>


#include "..\nmap.h"
#include "..\tcpip.h"
#include "winfix.h"
#include "..\NmapOps.h"
#include "..\nmap_error.h"

#ifdef _MSC_VER
# include <delayimp.h>
#endif

#ifdef _MSC_VER
#define DLI_ERROR VcppException(ERROR_SEVERITY_ERROR, ERROR_MOD_NOT_FOUND)
#endif

/*   delay-load hooks only for troubleshooting   */
#ifdef _MSC_VER
static int dli_done = 0;
static FARPROC WINAPI winip_dli_fail_hook(unsigned code, PDelayLoadInfo info);
#endif

extern NmapOps o;

int pcap_avail = 0;

/*   internal functions   */
static void win_cleanup(void);
static char pcaplist[4096];

/* The code that has no preconditions to being called, so it can be
   executed before even Nmap options parsing (so o.debugging and the
   like don't need to be used.  Its main function is to do
   WSAStartup() as some of the option parsing code does DNS
   resolution */
void win_pre_init() {
	WORD werd;
	WSADATA data;

	werd = MAKEWORD( 2, 2 );
	if( (WSAStartup(werd, &data)) !=0 )
		fatal("failed to start winsock.\n");
}

/* Requires that win_pre_init() has already been called, also that
   options processing has been done so that o.debugging is
   available */
void win_init()
{
	//   variables
	DWORD cb = 0;
	DWORD nRes;
	OSVERSIONINFOEX ver;
	PMIB_IPADDRTABLE pIp = 0;
	int i;
	int numipsleft;


	ver.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
	if(!GetVersionEx((LPOSVERSIONINFO)&ver))
	{
		ver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
		if(!GetVersionEx((LPOSVERSIONINFO)&ver))
			fatal("GetVersionEx failed\n");

		ver.wServicePackMajor = 0;
		ver.wServicePackMinor = 0;
	}


	//   Try to initialize winpcap
#ifdef _MSC_VER
	__try
#endif
	{
		ULONG len = sizeof(pcaplist);

		pcap_avail = 1;
		if(o.debugging > 2) printf("***WinIP***  trying to initialize winpcap 2.1\n");
		PacketGetAdapterNames(pcaplist, &len);
		if(o.debugging)
			printf("Winpcap present, dynamic linked to: %s\n", pcap_lib_version());
	}
#ifdef _MSC_VER
	__except(GetExceptionCode() == DLI_ERROR)
	{
		pcap_avail = 0;
		printf("WARNING: Failed to locate Winpcap. Nmap may not function properly until this is installed!  WinPcap is freely available from http://winpcap.polito.it.\n");
	}
#endif

	//   Check for a wpcap.dll (so we don't crash on old winpcap
	//   But only with VC++.NET, since old versions do not
	//   provide this functionality :(
#if defined(_MSC_VER) && _MSC_VER >= 1300
	if(pcap_avail)
	{
		if(FAILED(__HrLoadAllImportsForDll("wpcap.dll")))
		{
			error("WARNING: your winpcap is too old to use.  Nmap may not function.\n");
			pcap_avail = 0;
		}
	}
#endif

	o.isr00t = pcap_avail;
	atexit(win_cleanup);

	//   Mark load as complete so that dli errors are handled
#ifdef _MSC_VER
	dli_done = 1;
#endif
}


static void win_cleanup(void)
{
  WSACleanup();
}

typedef DWORD (__stdcall *PGBI)(IPAddr, PDWORD);

#ifdef _MSC_VER
static FARPROC WINAPI winip_dli_fail_hook(unsigned code, PDelayLoadInfo info)
{
  if(o.debugging)
    {
      printf("***WinIP***  delay load error:\n");
      switch(code)
 {
 case dliFailLoadLib:
   printf(" failed to load dll: %s\n", info->szDll);
   break;

 case dliFailGetProc:
   printf(" failed to load ");
   if(info->dlp.fImportByName)
     printf("function %s", info->dlp.szProcName + 2);
   else printf("ordinal %d", info->dlp.dwOrdinal);
   printf(" in dll %s\n", info->szDll);
   break;

 default:
   printf(" unknown error\n");
   break;
 }
    }

  if(dli_done)
    {
      printf("******* Unexpected delay-load failure *******\n");

      switch(code)
 {
 case dliFailLoadLib:
   printf(" failed to load dll: %s\n", info->szDll);
   if(!stricmp(info->szDll, "wpcap.dll"))
     printf(" this is most likely because you have"
     " winpcap 2.0 (2.1 or later is required)\n"
     "Get it from http://netgroup-serv.polito.it/winpcap\n");
   break;

 case dliFailGetProc:
   printf(" failed to load ");
   if(info->dlp.fImportByName)
     printf("function %s", info->dlp.szProcName + 2);
   else printf("ordinal %d", info->dlp.dwOrdinal);
   printf(" in dll %s\n", info->szDll);
   break;

 default:
   printf(" unknown error\n");
   break;
  }
    }

  return 0;
}
#endif // _MSC_VER



int my_close(int sd)
{
	return closesocket(sd);
}

int fork()
{
	fatal("no fork for you!\n");
	return 0;
}