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240 строки
7.4 KiB
C
240 строки
7.4 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 2016 - 2021, Steve Holme, <steve_holme@hotmail.com>.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#if defined(WIN32)
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#include <curl/curl.h>
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#include "system_win32.h"
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#include "version_win32.h"
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#include "curl_sspi.h"
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#include "warnless.h"
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/* The last #include files should be: */
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#include "curl_memory.h"
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#include "memdebug.h"
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LARGE_INTEGER Curl_freq;
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bool Curl_isVistaOrGreater;
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/* Handle of iphlpapp.dll */
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static HMODULE s_hIpHlpApiDll = NULL;
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/* Pointer to the if_nametoindex function */
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IF_NAMETOINDEX_FN Curl_if_nametoindex = NULL;
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/* Curl_win32_init() performs win32 global initialization */
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CURLcode Curl_win32_init(long flags)
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{
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/* CURL_GLOBAL_WIN32 controls the *optional* part of the initialization which
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is just for Winsock at the moment. Any required win32 initialization
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should take place after this block. */
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if(flags & CURL_GLOBAL_WIN32) {
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#ifdef USE_WINSOCK
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WORD wVersionRequested;
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WSADATA wsaData;
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int res;
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wVersionRequested = MAKEWORD(2, 2);
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res = WSAStartup(wVersionRequested, &wsaData);
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if(res)
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/* Tell the user that we couldn't find a usable */
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/* winsock.dll. */
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return CURLE_FAILED_INIT;
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/* Confirm that the Windows Sockets DLL supports what we need.*/
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/* Note that if the DLL supports versions greater */
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/* than wVersionRequested, it will still return */
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/* wVersionRequested in wVersion. wHighVersion contains the */
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/* highest supported version. */
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if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) ||
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HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested) ) {
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/* Tell the user that we couldn't find a usable */
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/* winsock.dll. */
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WSACleanup();
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return CURLE_FAILED_INIT;
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}
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/* The Windows Sockets DLL is acceptable. Proceed. */
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#elif defined(USE_LWIPSOCK)
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lwip_init();
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#endif
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} /* CURL_GLOBAL_WIN32 */
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#ifdef USE_WINDOWS_SSPI
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{
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CURLcode result = Curl_sspi_global_init();
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if(result)
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return result;
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}
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#endif
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s_hIpHlpApiDll = Curl_load_library(TEXT("iphlpapi.dll"));
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if(s_hIpHlpApiDll) {
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/* Get the address of the if_nametoindex function */
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IF_NAMETOINDEX_FN pIfNameToIndex =
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CURLX_FUNCTION_CAST(IF_NAMETOINDEX_FN,
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(GetProcAddress(s_hIpHlpApiDll, "if_nametoindex")));
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if(pIfNameToIndex)
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Curl_if_nametoindex = pIfNameToIndex;
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}
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/* curlx_verify_windows_version must be called during init at least once
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because it has its own initialization routine. */
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if(curlx_verify_windows_version(6, 0, 0, PLATFORM_WINNT,
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VERSION_GREATER_THAN_EQUAL)) {
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Curl_isVistaOrGreater = TRUE;
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}
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else
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Curl_isVistaOrGreater = FALSE;
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QueryPerformanceFrequency(&Curl_freq);
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return CURLE_OK;
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}
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/* Curl_win32_cleanup() is the opposite of Curl_win32_init() */
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void Curl_win32_cleanup(long init_flags)
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{
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if(s_hIpHlpApiDll) {
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FreeLibrary(s_hIpHlpApiDll);
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s_hIpHlpApiDll = NULL;
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Curl_if_nametoindex = NULL;
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}
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#ifdef USE_WINDOWS_SSPI
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Curl_sspi_global_cleanup();
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#endif
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if(init_flags & CURL_GLOBAL_WIN32) {
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#ifdef USE_WINSOCK
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WSACleanup();
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#endif
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}
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}
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#if !defined(LOAD_WITH_ALTERED_SEARCH_PATH)
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#define LOAD_WITH_ALTERED_SEARCH_PATH 0x00000008
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#endif
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#if !defined(LOAD_LIBRARY_SEARCH_SYSTEM32)
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#define LOAD_LIBRARY_SEARCH_SYSTEM32 0x00000800
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#endif
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/* We use our own typedef here since some headers might lack these */
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typedef HMODULE (APIENTRY *LOADLIBRARYEX_FN)(LPCTSTR, HANDLE, DWORD);
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/* See function definitions in winbase.h */
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#ifdef UNICODE
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# ifdef _WIN32_WCE
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# define LOADLIBARYEX L"LoadLibraryExW"
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# else
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# define LOADLIBARYEX "LoadLibraryExW"
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# endif
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#else
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# define LOADLIBARYEX "LoadLibraryExA"
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#endif
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/*
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* Curl_load_library()
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*
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* This is used to dynamically load DLLs using the most secure method available
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* for the version of Windows that we are running on.
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*
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* Parameters:
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*
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* filename [in] - The filename or full path of the DLL to load. If only the
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* filename is passed then the DLL will be loaded from the
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* Windows system directory.
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*
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* Returns the handle of the module on success; otherwise NULL.
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*/
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HMODULE Curl_load_library(LPCTSTR filename)
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{
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#ifndef CURL_WINDOWS_APP
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HMODULE hModule = NULL;
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LOADLIBRARYEX_FN pLoadLibraryEx = NULL;
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/* Get a handle to kernel32 so we can access it's functions at runtime */
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HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32"));
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if(!hKernel32)
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return NULL;
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/* Attempt to find LoadLibraryEx() which is only available on Windows 2000
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and above */
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pLoadLibraryEx =
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CURLX_FUNCTION_CAST(LOADLIBRARYEX_FN,
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(GetProcAddress(hKernel32, LOADLIBARYEX)));
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/* Detect if there's already a path in the filename and load the library if
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there is. Note: Both back slashes and forward slashes have been supported
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since the earlier days of DOS at an API level although they are not
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supported by command prompt */
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if(_tcspbrk(filename, TEXT("\\/"))) {
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/** !checksrc! disable BANNEDFUNC 1 **/
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hModule = pLoadLibraryEx ?
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pLoadLibraryEx(filename, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) :
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LoadLibrary(filename);
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}
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/* Detect if KB2533623 is installed, as LOAD_LIBRARY_SEARCH_SYSTEM32 is only
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supported on Windows Vista, Windows Server 2008, Windows 7 and Windows
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Server 2008 R2 with this patch or natively on Windows 8 and above */
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else if(pLoadLibraryEx && GetProcAddress(hKernel32, "AddDllDirectory")) {
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/* Load the DLL from the Windows system directory */
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hModule = pLoadLibraryEx(filename, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
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}
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else {
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/* Attempt to get the Windows system path */
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UINT systemdirlen = GetSystemDirectory(NULL, 0);
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if(systemdirlen) {
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/* Allocate space for the full DLL path (Room for the null terminator
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is included in systemdirlen) */
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size_t filenamelen = _tcslen(filename);
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TCHAR *path = malloc(sizeof(TCHAR) * (systemdirlen + 1 + filenamelen));
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if(path && GetSystemDirectory(path, systemdirlen)) {
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/* Calculate the full DLL path */
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_tcscpy(path + _tcslen(path), TEXT("\\"));
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_tcscpy(path + _tcslen(path), filename);
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/* Load the DLL from the Windows system directory */
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/** !checksrc! disable BANNEDFUNC 1 **/
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hModule = pLoadLibraryEx ?
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pLoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) :
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LoadLibrary(path);
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}
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free(path);
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}
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}
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return hModule;
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#else
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/* the Universal Windows Platform (UWP) can't do this */
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(void)filename;
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return NULL;
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#endif
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}
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#endif /* WIN32 */
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