Annotation of embedaddon/curl/lib/system_win32.c, revision 1.1

1.1     ! misho       1: /***************************************************************************
        !             2:  *                                  _   _ ____  _
        !             3:  *  Project                     ___| | | |  _ \| |
        !             4:  *                             / __| | | | |_) | |
        !             5:  *                            | (__| |_| |  _ <| |___
        !             6:  *                             \___|\___/|_| \_\_____|
        !             7:  *
        !             8:  * Copyright (C) 2016 - 2020, Steve Holme, <steve_holme@hotmail.com>.
        !             9:  *
        !            10:  * This software is licensed as described in the file COPYING, which
        !            11:  * you should have received as part of this distribution. The terms
        !            12:  * are also available at https://curl.haxx.se/docs/copyright.html.
        !            13:  *
        !            14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
        !            15:  * copies of the Software, and permit persons to whom the Software is
        !            16:  * furnished to do so, under the terms of the COPYING file.
        !            17:  *
        !            18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
        !            19:  * KIND, either express or implied.
        !            20:  *
        !            21:  ***************************************************************************/
        !            22: 
        !            23: #include "curl_setup.h"
        !            24: 
        !            25: #if defined(WIN32)
        !            26: 
        !            27: #include <curl/curl.h>
        !            28: #include "system_win32.h"
        !            29: #include "curl_sspi.h"
        !            30: #include "warnless.h"
        !            31: 
        !            32: /* The last #include files should be: */
        !            33: #include "curl_memory.h"
        !            34: #include "memdebug.h"
        !            35: 
        !            36: LARGE_INTEGER Curl_freq;
        !            37: bool Curl_isVistaOrGreater;
        !            38: 
        !            39: /* Handle of iphlpapp.dll */
        !            40: static HMODULE s_hIpHlpApiDll = NULL;
        !            41: 
        !            42: /* Pointer to the if_nametoindex function */
        !            43: IF_NAMETOINDEX_FN Curl_if_nametoindex = NULL;
        !            44: 
        !            45: /* Curl_win32_init() performs win32 global initialization */
        !            46: CURLcode Curl_win32_init(long flags)
        !            47: {
        !            48:   /* CURL_GLOBAL_WIN32 controls the *optional* part of the initialization which
        !            49:      is just for Winsock at the moment. Any required win32 initialization
        !            50:      should take place after this block. */
        !            51:   if(flags & CURL_GLOBAL_WIN32) {
        !            52: #ifdef USE_WINSOCK
        !            53:     WORD wVersionRequested;
        !            54:     WSADATA wsaData;
        !            55:     int res;
        !            56: 
        !            57: #if defined(ENABLE_IPV6) && (USE_WINSOCK < 2)
        !            58: #error IPV6_requires_winsock2
        !            59: #endif
        !            60: 
        !            61:     wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK);
        !            62: 
        !            63:     res = WSAStartup(wVersionRequested, &wsaData);
        !            64: 
        !            65:     if(res != 0)
        !            66:       /* Tell the user that we couldn't find a usable */
        !            67:       /* winsock.dll.     */
        !            68:       return CURLE_FAILED_INIT;
        !            69: 
        !            70:     /* Confirm that the Windows Sockets DLL supports what we need.*/
        !            71:     /* Note that if the DLL supports versions greater */
        !            72:     /* than wVersionRequested, it will still return */
        !            73:     /* wVersionRequested in wVersion. wHighVersion contains the */
        !            74:     /* highest supported version. */
        !            75: 
        !            76:     if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) ||
        !            77:        HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested) ) {
        !            78:       /* Tell the user that we couldn't find a usable */
        !            79: 
        !            80:       /* winsock.dll. */
        !            81:       WSACleanup();
        !            82:       return CURLE_FAILED_INIT;
        !            83:     }
        !            84:     /* The Windows Sockets DLL is acceptable. Proceed. */
        !            85:   #elif defined(USE_LWIPSOCK)
        !            86:     lwip_init();
        !            87:   #endif
        !            88:   } /* CURL_GLOBAL_WIN32 */
        !            89: 
        !            90: #ifdef USE_WINDOWS_SSPI
        !            91:   {
        !            92:     CURLcode result = Curl_sspi_global_init();
        !            93:     if(result)
        !            94:       return result;
        !            95:   }
        !            96: #endif
        !            97: 
        !            98:   s_hIpHlpApiDll = Curl_load_library(TEXT("iphlpapi.dll"));
        !            99:   if(s_hIpHlpApiDll) {
        !           100:     /* Get the address of the if_nametoindex function */
        !           101:     IF_NAMETOINDEX_FN pIfNameToIndex =
        !           102:       CURLX_FUNCTION_CAST(IF_NAMETOINDEX_FN,
        !           103:                           (GetProcAddress(s_hIpHlpApiDll, "if_nametoindex")));
        !           104: 
        !           105:     if(pIfNameToIndex)
        !           106:       Curl_if_nametoindex = pIfNameToIndex;
        !           107:   }
        !           108: 
        !           109:   if(Curl_verify_windows_version(6, 0, PLATFORM_WINNT,
        !           110:                                  VERSION_GREATER_THAN_EQUAL)) {
        !           111:     Curl_isVistaOrGreater = TRUE;
        !           112:   }
        !           113:   else
        !           114:     Curl_isVistaOrGreater = FALSE;
        !           115: 
        !           116:   QueryPerformanceFrequency(&Curl_freq);
        !           117:   return CURLE_OK;
        !           118: }
        !           119: 
        !           120: /* Curl_win32_cleanup() is the opposite of Curl_win32_init() */
        !           121: void Curl_win32_cleanup(long init_flags)
        !           122: {
        !           123:   if(s_hIpHlpApiDll) {
        !           124:     FreeLibrary(s_hIpHlpApiDll);
        !           125:     s_hIpHlpApiDll = NULL;
        !           126:     Curl_if_nametoindex = NULL;
        !           127:   }
        !           128: 
        !           129: #ifdef USE_WINDOWS_SSPI
        !           130:   Curl_sspi_global_cleanup();
        !           131: #endif
        !           132: 
        !           133:   if(init_flags & CURL_GLOBAL_WIN32) {
        !           134: #ifdef USE_WINSOCK
        !           135:     WSACleanup();
        !           136: #endif
        !           137:   }
        !           138: }
        !           139: 
        !           140: #if !defined(LOAD_WITH_ALTERED_SEARCH_PATH)
        !           141: #define LOAD_WITH_ALTERED_SEARCH_PATH  0x00000008
        !           142: #endif
        !           143: 
        !           144: #if !defined(LOAD_LIBRARY_SEARCH_SYSTEM32)
        !           145: #define LOAD_LIBRARY_SEARCH_SYSTEM32   0x00000800
        !           146: #endif
        !           147: 
        !           148: /* We use our own typedef here since some headers might lack these */
        !           149: typedef HMODULE (APIENTRY *LOADLIBRARYEX_FN)(LPCTSTR, HANDLE, DWORD);
        !           150: 
        !           151: /* See function definitions in winbase.h */
        !           152: #ifdef UNICODE
        !           153: #  ifdef _WIN32_WCE
        !           154: #    define LOADLIBARYEX  L"LoadLibraryExW"
        !           155: #  else
        !           156: #    define LOADLIBARYEX  "LoadLibraryExW"
        !           157: #  endif
        !           158: #else
        !           159: #  define LOADLIBARYEX    "LoadLibraryExA"
        !           160: #endif
        !           161: 
        !           162: /*
        !           163:  * Curl_verify_windows_version()
        !           164:  *
        !           165:  * This is used to verify if we are running on a specific windows version.
        !           166:  *
        !           167:  * Parameters:
        !           168:  *
        !           169:  * majorVersion [in] - The major version number.
        !           170:  * minorVersion [in] - The minor version number.
        !           171:  * platform     [in] - The optional platform identifier.
        !           172:  * condition    [in] - The test condition used to specifier whether we are
        !           173:  *                     checking a version less then, equal to or greater than
        !           174:  *                     what is specified in the major and minor version
        !           175:  *                     numbers.
        !           176:  *
        !           177:  * Returns TRUE if matched; otherwise FALSE.
        !           178:  */
        !           179: bool Curl_verify_windows_version(const unsigned int majorVersion,
        !           180:                                  const unsigned int minorVersion,
        !           181:                                  const PlatformIdentifier platform,
        !           182:                                  const VersionCondition condition)
        !           183: {
        !           184:   bool matched = FALSE;
        !           185: 
        !           186: #if defined(CURL_WINDOWS_APP)
        !           187:   /* We have no way to determine the Windows version from Windows apps,
        !           188:      so let's assume we're running on the target Windows version. */
        !           189:   const WORD fullVersion = MAKEWORD(minorVersion, majorVersion);
        !           190:   const WORD targetVersion = (WORD)_WIN32_WINNT;
        !           191: 
        !           192:   switch(condition) {
        !           193:   case VERSION_LESS_THAN:
        !           194:     matched = targetVersion < fullVersion;
        !           195:     break;
        !           196: 
        !           197:   case VERSION_LESS_THAN_EQUAL:
        !           198:     matched = targetVersion <= fullVersion;
        !           199:     break;
        !           200: 
        !           201:   case VERSION_EQUAL:
        !           202:     matched = targetVersion == fullVersion;
        !           203:     break;
        !           204: 
        !           205:   case VERSION_GREATER_THAN_EQUAL:
        !           206:     matched = targetVersion >= fullVersion;
        !           207:     break;
        !           208: 
        !           209:   case VERSION_GREATER_THAN:
        !           210:     matched = targetVersion > fullVersion;
        !           211:     break;
        !           212:   }
        !           213: 
        !           214:   if(matched && (platform == PLATFORM_WINDOWS)) {
        !           215:     /* we're always running on PLATFORM_WINNT */
        !           216:     matched = FALSE;
        !           217:   }
        !           218: #elif !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_WIN2K) || \
        !           219:     (_WIN32_WINNT < _WIN32_WINNT_WIN2K)
        !           220:   OSVERSIONINFO osver;
        !           221: 
        !           222:   memset(&osver, 0, sizeof(osver));
        !           223:   osver.dwOSVersionInfoSize = sizeof(osver);
        !           224: 
        !           225:   /* Find out Windows version */
        !           226:   if(GetVersionEx(&osver)) {
        !           227:     /* Verify the Operating System version number */
        !           228:     switch(condition) {
        !           229:     case VERSION_LESS_THAN:
        !           230:       if(osver.dwMajorVersion < majorVersion ||
        !           231:         (osver.dwMajorVersion == majorVersion &&
        !           232:          osver.dwMinorVersion < minorVersion))
        !           233:         matched = TRUE;
        !           234:       break;
        !           235: 
        !           236:     case VERSION_LESS_THAN_EQUAL:
        !           237:       if(osver.dwMajorVersion < majorVersion ||
        !           238:         (osver.dwMajorVersion == majorVersion &&
        !           239:          osver.dwMinorVersion <= minorVersion))
        !           240:         matched = TRUE;
        !           241:       break;
        !           242: 
        !           243:     case VERSION_EQUAL:
        !           244:       if(osver.dwMajorVersion == majorVersion &&
        !           245:          osver.dwMinorVersion == minorVersion)
        !           246:         matched = TRUE;
        !           247:       break;
        !           248: 
        !           249:     case VERSION_GREATER_THAN_EQUAL:
        !           250:       if(osver.dwMajorVersion > majorVersion ||
        !           251:         (osver.dwMajorVersion == majorVersion &&
        !           252:          osver.dwMinorVersion >= minorVersion))
        !           253:         matched = TRUE;
        !           254:       break;
        !           255: 
        !           256:     case VERSION_GREATER_THAN:
        !           257:       if(osver.dwMajorVersion > majorVersion ||
        !           258:         (osver.dwMajorVersion == majorVersion &&
        !           259:          osver.dwMinorVersion > minorVersion))
        !           260:         matched = TRUE;
        !           261:       break;
        !           262:     }
        !           263: 
        !           264:     /* Verify the platform identifier (if necessary) */
        !           265:     if(matched) {
        !           266:       switch(platform) {
        !           267:       case PLATFORM_WINDOWS:
        !           268:         if(osver.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS)
        !           269:           matched = FALSE;
        !           270:         break;
        !           271: 
        !           272:       case PLATFORM_WINNT:
        !           273:         if(osver.dwPlatformId != VER_PLATFORM_WIN32_NT)
        !           274:           matched = FALSE;
        !           275: 
        !           276:       default: /* like platform == PLATFORM_DONT_CARE */
        !           277:         break;
        !           278:       }
        !           279:     }
        !           280:   }
        !           281: #else
        !           282:   ULONGLONG cm = 0;
        !           283:   OSVERSIONINFOEX osver;
        !           284:   BYTE majorCondition;
        !           285:   BYTE minorCondition;
        !           286:   BYTE spMajorCondition;
        !           287:   BYTE spMinorCondition;
        !           288: 
        !           289:   switch(condition) {
        !           290:   case VERSION_LESS_THAN:
        !           291:     majorCondition = VER_LESS;
        !           292:     minorCondition = VER_LESS;
        !           293:     spMajorCondition = VER_LESS_EQUAL;
        !           294:     spMinorCondition = VER_LESS_EQUAL;
        !           295:     break;
        !           296: 
        !           297:   case VERSION_LESS_THAN_EQUAL:
        !           298:     majorCondition = VER_LESS_EQUAL;
        !           299:     minorCondition = VER_LESS_EQUAL;
        !           300:     spMajorCondition = VER_LESS_EQUAL;
        !           301:     spMinorCondition = VER_LESS_EQUAL;
        !           302:     break;
        !           303: 
        !           304:   case VERSION_EQUAL:
        !           305:     majorCondition = VER_EQUAL;
        !           306:     minorCondition = VER_EQUAL;
        !           307:     spMajorCondition = VER_GREATER_EQUAL;
        !           308:     spMinorCondition = VER_GREATER_EQUAL;
        !           309:     break;
        !           310: 
        !           311:   case VERSION_GREATER_THAN_EQUAL:
        !           312:     majorCondition = VER_GREATER_EQUAL;
        !           313:     minorCondition = VER_GREATER_EQUAL;
        !           314:     spMajorCondition = VER_GREATER_EQUAL;
        !           315:     spMinorCondition = VER_GREATER_EQUAL;
        !           316:     break;
        !           317: 
        !           318:   case VERSION_GREATER_THAN:
        !           319:     majorCondition = VER_GREATER;
        !           320:     minorCondition = VER_GREATER;
        !           321:     spMajorCondition = VER_GREATER_EQUAL;
        !           322:     spMinorCondition = VER_GREATER_EQUAL;
        !           323:     break;
        !           324: 
        !           325:   default:
        !           326:     return FALSE;
        !           327:   }
        !           328: 
        !           329:   memset(&osver, 0, sizeof(osver));
        !           330:   osver.dwOSVersionInfoSize = sizeof(osver);
        !           331:   osver.dwMajorVersion = majorVersion;
        !           332:   osver.dwMinorVersion = minorVersion;
        !           333:   if(platform == PLATFORM_WINDOWS)
        !           334:     osver.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS;
        !           335:   else if(platform == PLATFORM_WINNT)
        !           336:     osver.dwPlatformId = VER_PLATFORM_WIN32_NT;
        !           337: 
        !           338:   cm = VerSetConditionMask(cm, VER_MAJORVERSION, majorCondition);
        !           339:   cm = VerSetConditionMask(cm, VER_MINORVERSION, minorCondition);
        !           340:   cm = VerSetConditionMask(cm, VER_SERVICEPACKMAJOR, spMajorCondition);
        !           341:   cm = VerSetConditionMask(cm, VER_SERVICEPACKMINOR, spMinorCondition);
        !           342:   if(platform != PLATFORM_DONT_CARE)
        !           343:     cm = VerSetConditionMask(cm, VER_PLATFORMID, VER_EQUAL);
        !           344: 
        !           345:   if(VerifyVersionInfo(&osver, (VER_MAJORVERSION | VER_MINORVERSION |
        !           346:                                 VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR),
        !           347:                        cm))
        !           348:     matched = TRUE;
        !           349: #endif
        !           350: 
        !           351:   return matched;
        !           352: }
        !           353: 
        !           354: /*
        !           355:  * Curl_load_library()
        !           356:  *
        !           357:  * This is used to dynamically load DLLs using the most secure method available
        !           358:  * for the version of Windows that we are running on.
        !           359:  *
        !           360:  * Parameters:
        !           361:  *
        !           362:  * filename  [in] - The filename or full path of the DLL to load. If only the
        !           363:  *                  filename is passed then the DLL will be loaded from the
        !           364:  *                  Windows system directory.
        !           365:  *
        !           366:  * Returns the handle of the module on success; otherwise NULL.
        !           367:  */
        !           368: HMODULE Curl_load_library(LPCTSTR filename)
        !           369: {
        !           370: #ifndef CURL_WINDOWS_APP
        !           371:   HMODULE hModule = NULL;
        !           372:   LOADLIBRARYEX_FN pLoadLibraryEx = NULL;
        !           373: 
        !           374:   /* Get a handle to kernel32 so we can access it's functions at runtime */
        !           375:   HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32"));
        !           376:   if(!hKernel32)
        !           377:     return NULL;
        !           378: 
        !           379:   /* Attempt to find LoadLibraryEx() which is only available on Windows 2000
        !           380:      and above */
        !           381:   pLoadLibraryEx =
        !           382:     CURLX_FUNCTION_CAST(LOADLIBRARYEX_FN,
        !           383:                         (GetProcAddress(hKernel32, LOADLIBARYEX)));
        !           384: 
        !           385:   /* Detect if there's already a path in the filename and load the library if
        !           386:      there is. Note: Both back slashes and forward slashes have been supported
        !           387:      since the earlier days of DOS at an API level although they are not
        !           388:      supported by command prompt */
        !           389:   if(_tcspbrk(filename, TEXT("\\/"))) {
        !           390:     /** !checksrc! disable BANNEDFUNC 1 **/
        !           391:     hModule = pLoadLibraryEx ?
        !           392:       pLoadLibraryEx(filename, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) :
        !           393:       LoadLibrary(filename);
        !           394:   }
        !           395:   /* Detect if KB2533623 is installed, as LOAD_LIBARY_SEARCH_SYSTEM32 is only
        !           396:      supported on Windows Vista, Windows Server 2008, Windows 7 and Windows
        !           397:      Server 2008 R2 with this patch or natively on Windows 8 and above */
        !           398:   else if(pLoadLibraryEx && GetProcAddress(hKernel32, "AddDllDirectory")) {
        !           399:     /* Load the DLL from the Windows system directory */
        !           400:     hModule = pLoadLibraryEx(filename, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
        !           401:   }
        !           402:   else {
        !           403:     /* Attempt to get the Windows system path */
        !           404:     UINT systemdirlen = GetSystemDirectory(NULL, 0);
        !           405:     if(systemdirlen) {
        !           406:       /* Allocate space for the full DLL path (Room for the null terminator
        !           407:          is included in systemdirlen) */
        !           408:       size_t filenamelen = _tcslen(filename);
        !           409:       TCHAR *path = malloc(sizeof(TCHAR) * (systemdirlen + 1 + filenamelen));
        !           410:       if(path && GetSystemDirectory(path, systemdirlen)) {
        !           411:         /* Calculate the full DLL path */
        !           412:         _tcscpy(path + _tcslen(path), TEXT("\\"));
        !           413:         _tcscpy(path + _tcslen(path), filename);
        !           414: 
        !           415:         /* Load the DLL from the Windows system directory */
        !           416:         /** !checksrc! disable BANNEDFUNC 1 **/
        !           417:         hModule = pLoadLibraryEx ?
        !           418:           pLoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) :
        !           419:           LoadLibrary(path);
        !           420: 
        !           421:       }
        !           422:       free(path);
        !           423:     }
        !           424:   }
        !           425:   return hModule;
        !           426: #else
        !           427:   /* the Universal Windows Platform (UWP) can't do this */
        !           428:   (void)filename;
        !           429:   return NULL;
        !           430: #endif
        !           431: }
        !           432: 
        !           433: #endif /* WIN32 */

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