1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2016 - 2021, Steve Holme, <steve_holme@hotmail.com>.
*
* 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.
*
***************************************************************************/
#include "curl_setup.h"
#if defined(WIN32)
#include <curl/curl.h>
#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;
/* Handle of iphlpapp.dll */
static HMODULE s_hIpHlpApiDll = NULL;
/* Pointer to the if_nametoindex function */
IF_NAMETOINDEX_FN Curl_if_nametoindex = NULL;
/* Curl_win32_init() performs win32 global initialization */
CURLcode Curl_win32_init(long flags)
{
/* 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;
}
/* 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;
QueryPerformanceFrequency(&Curl_freq);
return CURLE_OK;
}
/* Curl_win32_cleanup() is the opposite of Curl_win32_init() */
void Curl_win32_cleanup(long init_flags)
{
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 */
|
