/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) Steve Holme, . * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at https://curl.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * * SPDX-License-Identifier: curl * ***************************************************************************/ #include "curl_setup.h" #if defined(_WIN32) #include #include "system_win32.h" #include "version_win32.h" #include "curl_sspi.h" #include "warnless.h" /* The last #include files should be: */ #include "curl_memory.h" #include "memdebug.h" LARGE_INTEGER Curl_freq; bool Curl_isVistaOrGreater; bool Curl_isWindows8OrGreater; /* Handle of iphlpapp.dll */ static HMODULE s_hIpHlpApiDll = NULL; /* Function pointers */ IF_NAMETOINDEX_FN Curl_if_nametoindex = NULL; FREEADDRINFOEXW_FN Curl_FreeAddrInfoExW = NULL; GETADDRINFOEXCANCEL_FN Curl_GetAddrInfoExCancel = NULL; GETADDRINFOEXW_FN Curl_GetAddrInfoExW = NULL; /* Curl_win32_init() performs win32 global initialization */ CURLcode Curl_win32_init(long flags) { #ifdef USE_WINSOCK HMODULE ws2_32Dll; #endif /* CURL_GLOBAL_WIN32 controls the *optional* part of the initialization which is just for Winsock at the moment. Any required win32 initialization should take place after this block. */ if(flags & CURL_GLOBAL_WIN32) { #ifdef USE_WINSOCK WORD wVersionRequested; WSADATA wsaData; int res; wVersionRequested = MAKEWORD(2, 2); res = WSAStartup(wVersionRequested, &wsaData); if(res) /* Tell the user that we couldn't find a usable */ /* winsock.dll. */ return CURLE_FAILED_INIT; /* Confirm that the Windows Sockets DLL supports what we need.*/ /* Note that if the DLL supports versions greater */ /* than wVersionRequested, it will still return */ /* wVersionRequested in wVersion. wHighVersion contains the */ /* highest supported version. */ if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) || HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested) ) { /* Tell the user that we couldn't find a usable */ /* winsock.dll. */ WSACleanup(); return CURLE_FAILED_INIT; } /* The Windows Sockets DLL is acceptable. Proceed. */ #elif defined(USE_LWIPSOCK) lwip_init(); #endif } /* CURL_GLOBAL_WIN32 */ #ifdef USE_WINDOWS_SSPI { CURLcode result = Curl_sspi_global_init(); if(result) return result; } #endif s_hIpHlpApiDll = Curl_load_library(TEXT("iphlpapi.dll")); if(s_hIpHlpApiDll) { /* Get the address of the if_nametoindex function */ IF_NAMETOINDEX_FN pIfNameToIndex = CURLX_FUNCTION_CAST(IF_NAMETOINDEX_FN, (GetProcAddress(s_hIpHlpApiDll, "if_nametoindex"))); if(pIfNameToIndex) Curl_if_nametoindex = pIfNameToIndex; } #ifdef USE_WINSOCK ws2_32Dll = GetModuleHandleA("ws2_32"); if(ws2_32Dll) { Curl_FreeAddrInfoExW = CURLX_FUNCTION_CAST(FREEADDRINFOEXW_FN, GetProcAddress(ws2_32Dll, "FreeAddrInfoExW")); Curl_GetAddrInfoExCancel = CURLX_FUNCTION_CAST(GETADDRINFOEXCANCEL_FN, GetProcAddress(ws2_32Dll, "GetAddrInfoExCancel")); Curl_GetAddrInfoExW = CURLX_FUNCTION_CAST(GETADDRINFOEXW_FN, GetProcAddress(ws2_32Dll, "GetAddrInfoExW")); } #endif /* curlx_verify_windows_version must be called during init at least once because it has its own initialization routine. */ if(curlx_verify_windows_version(6, 0, 0, PLATFORM_WINNT, VERSION_GREATER_THAN_EQUAL)) { Curl_isVistaOrGreater = TRUE; } else Curl_isVistaOrGreater = FALSE; if(curlx_verify_windows_version(6, 2, 0, PLATFORM_WINNT, VERSION_GREATER_THAN_EQUAL)) { Curl_isWindows8OrGreater = TRUE; } else Curl_isWindows8OrGreater = FALSE; QueryPerformanceFrequency(&Curl_freq); return CURLE_OK; } /* Curl_win32_cleanup() is the opposite of Curl_win32_init() */ void Curl_win32_cleanup(long init_flags) { Curl_FreeAddrInfoExW = NULL; Curl_GetAddrInfoExCancel = NULL; Curl_GetAddrInfoExW = NULL; if(s_hIpHlpApiDll) { FreeLibrary(s_hIpHlpApiDll); s_hIpHlpApiDll = NULL; Curl_if_nametoindex = NULL; } #ifdef USE_WINDOWS_SSPI Curl_sspi_global_cleanup(); #endif if(init_flags & CURL_GLOBAL_WIN32) { #ifdef USE_WINSOCK WSACleanup(); #endif } } #if !defined(LOAD_WITH_ALTERED_SEARCH_PATH) #define LOAD_WITH_ALTERED_SEARCH_PATH 0x00000008 #endif #if !defined(LOAD_LIBRARY_SEARCH_SYSTEM32) #define LOAD_LIBRARY_SEARCH_SYSTEM32 0x00000800 #endif /* We use our own typedef here since some headers might lack these */ typedef HMODULE (APIENTRY *LOADLIBRARYEX_FN)(LPCTSTR, HANDLE, DWORD); /* See function definitions in winbase.h */ #ifdef UNICODE # ifdef _WIN32_WCE # define LOADLIBARYEX L"LoadLibraryExW" # else # define LOADLIBARYEX "LoadLibraryExW" # endif #else # define LOADLIBARYEX "LoadLibraryExA" #endif /* * Curl_load_library() * * This is used to dynamically load DLLs using the most secure method available * for the version of Windows that we are running on. * * Parameters: * * filename [in] - The filename or full path of the DLL to load. If only the * filename is passed then the DLL will be loaded from the * Windows system directory. * * Returns the handle of the module on success; otherwise NULL. */ HMODULE Curl_load_library(LPCTSTR filename) { #ifndef CURL_WINDOWS_APP HMODULE hModule = NULL; LOADLIBRARYEX_FN pLoadLibraryEx = NULL; /* Get a handle to kernel32 so we can access it's functions at runtime */ HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32")); if(!hKernel32) return NULL; /* Attempt to find LoadLibraryEx() which is only available on Windows 2000 and above */ pLoadLibraryEx = CURLX_FUNCTION_CAST(LOADLIBRARYEX_FN, (GetProcAddress(hKernel32, LOADLIBARYEX))); /* Detect if there's already a path in the filename and load the library if there is. Note: Both back slashes and forward slashes have been supported since the earlier days of DOS at an API level although they are not supported by command prompt */ if(_tcspbrk(filename, TEXT("\\/"))) { /** !checksrc! disable BANNEDFUNC 1 **/ hModule = pLoadLibraryEx ? pLoadLibraryEx(filename, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) : LoadLibrary(filename); } /* Detect if KB2533623 is installed, as LOAD_LIBRARY_SEARCH_SYSTEM32 is only supported on Windows Vista, Windows Server 2008, Windows 7 and Windows Server 2008 R2 with this patch or natively on Windows 8 and above */ else if(pLoadLibraryEx && GetProcAddress(hKernel32, "AddDllDirectory")) { /* Load the DLL from the Windows system directory */ hModule = pLoadLibraryEx(filename, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32); } else { /* Attempt to get the Windows system path */ UINT systemdirlen = GetSystemDirectory(NULL, 0); if(systemdirlen) { /* Allocate space for the full DLL path (Room for the null terminator is included in systemdirlen) */ size_t filenamelen = _tcslen(filename); TCHAR *path = malloc(sizeof(TCHAR) * (systemdirlen + 1 + filenamelen)); if(path && GetSystemDirectory(path, systemdirlen)) { /* Calculate the full DLL path */ _tcscpy(path + _tcslen(path), TEXT("\\")); _tcscpy(path + _tcslen(path), filename); /* Load the DLL from the Windows system directory */ /** !checksrc! disable BANNEDFUNC 1 **/ hModule = pLoadLibraryEx ? pLoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH) : LoadLibrary(path); } free(path); } } return hModule; #else /* the Universal Windows Platform (UWP) can't do this */ (void)filename; return NULL; #endif } #endif /* _WIN32 */