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30c5bec9a403f0fb1e89af87ce68a643dba667ef
nmap/mswin32/winfix.cc
fyodor 87e4e19e02 bug fixing
2005-08-24 19:22:11 +00:00

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/***************************************************************************
* 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 *
* clarify our interpretation of derived works with some common examples. *
* 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];
void win_init()
{
// variables
DWORD cb = 0;
DWORD nRes;
OSVERSIONINFOEX ver;
PMIB_IPADDRTABLE pIp = 0;
int i;
int numipsleft;
WORD werd;
WSADATA data;
werd = MAKEWORD( 2, 2 );
if( (WSAStartup(werd, &data)) !=0 )
fatal("failed to start winsock.\n");
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;
}
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