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OpenSSL: update to 1.0.2a
[tomato.git] / release / src-rt-6.x.4708 / router / openssl / crypto / dso / dso_win32.c
blobc65234e9c44bb577719cabc14bbb25feb73de049
1 /* dso_win32.c -*- mode:C; c-file-style: "eay" -*- */
2 /*
3 * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
4 * 2000.
5 */
6 /* ====================================================================
7 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60 #include <stdio.h>
61 #include <string.h>
62 #include "cryptlib.h"
63 #include <openssl/dso.h>
64
65 #if !defined(DSO_WIN32)
66 DSO_METHOD *DSO_METHOD_win32(void)
67 {
68 return NULL;
69 }
70 #else
71
72 # ifdef _WIN32_WCE
73 # if _WIN32_WCE < 300
74 static FARPROC GetProcAddressA(HMODULE hModule, LPCSTR lpProcName)
75 {
76 WCHAR lpProcNameW[64];
77 int i;
78
79 for (i = 0; lpProcName[i] && i < 64; i++)
80 lpProcNameW[i] = (WCHAR)lpProcName[i];
81 if (i == 64)
82 return NULL;
83 lpProcNameW[i] = 0;
84
85 return GetProcAddressW(hModule, lpProcNameW);
86 }
87 # endif
88 # undef GetProcAddress
89 # define GetProcAddress GetProcAddressA
90
91 static HINSTANCE LoadLibraryA(LPCSTR lpLibFileName)
92 {
93 WCHAR *fnamw;
94 size_t len_0 = strlen(lpLibFileName) + 1, i;
95
96 # ifdef _MSC_VER
97 fnamw = (WCHAR *)_alloca(len_0 * sizeof(WCHAR));
98 # else
99 fnamw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
100 # endif
101 if (fnamw == NULL) {
102 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
103 return NULL;
104 }
105 # if defined(_WIN32_WCE) && _WIN32_WCE>=101
106 if (!MultiByteToWideChar(CP_ACP, 0, lpLibFileName, len_0, fnamw, len_0))
107 # endif
108 for (i = 0; i < len_0; i++)
109 fnamw[i] = (WCHAR)lpLibFileName[i];
110
111 return LoadLibraryW(fnamw);
112 }
113 # endif
114
115 /* Part of the hack in "win32_load" ... */
116 # define DSO_MAX_TRANSLATED_SIZE 256
117
118 static int win32_load(DSO *dso);
119 static int win32_unload(DSO *dso);
120 static void *win32_bind_var(DSO *dso, const char *symname);
121 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname);
122 # if 0
123 static int win32_unbind_var(DSO *dso, char *symname, void *symptr);
124 static int win32_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
125 static int win32_init(DSO *dso);
126 static int win32_finish(DSO *dso);
127 static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg);
128 # endif
129 static char *win32_name_converter(DSO *dso, const char *filename);
130 static char *win32_merger(DSO *dso, const char *filespec1,
131 const char *filespec2);
132 static int win32_pathbyaddr(void *addr, char *path, int sz);
133 static void *win32_globallookup(const char *name);
134
135 static const char *openssl_strnchr(const char *string, int c, size_t len);
136
137 static DSO_METHOD dso_meth_win32 = {
138 "OpenSSL 'win32' shared library method",
139 win32_load,
140 win32_unload,
141 win32_bind_var,
142 win32_bind_func,
143 /* For now, "unbind" doesn't exist */
144 # if 0
145 NULL, /* unbind_var */
146 NULL, /* unbind_func */
147 # endif
148 NULL, /* ctrl */
149 win32_name_converter,
150 win32_merger,
151 NULL, /* init */
152 NULL, /* finish */
153 win32_pathbyaddr,
154 win32_globallookup
155 };
156
157 DSO_METHOD *DSO_METHOD_win32(void)
158 {
159 return (&dso_meth_win32);
160 }
161
162 /*
163 * For this DSO_METHOD, our meth_data STACK will contain; (i) a pointer to
164 * the handle (HINSTANCE) returned from LoadLibrary(), and copied.
165 */
166
167 static int win32_load(DSO *dso)
168 {
169 HINSTANCE h = NULL, *p = NULL;
170 /* See applicable comments from dso_dl.c */
171 char *filename = DSO_convert_filename(dso, NULL);
172
173 if (filename == NULL) {
174 DSOerr(DSO_F_WIN32_LOAD, DSO_R_NO_FILENAME);
175 goto err;
176 }
177 h = LoadLibraryA(filename);
178 if (h == NULL) {
179 DSOerr(DSO_F_WIN32_LOAD, DSO_R_LOAD_FAILED);
180 ERR_add_error_data(3, "filename(", filename, ")");
181 goto err;
182 }
183 p = (HINSTANCE *) OPENSSL_malloc(sizeof(HINSTANCE));
184 if (p == NULL) {
185 DSOerr(DSO_F_WIN32_LOAD, ERR_R_MALLOC_FAILURE);
186 goto err;
187 }
188 *p = h;
189 if (!sk_void_push(dso->meth_data, p)) {
190 DSOerr(DSO_F_WIN32_LOAD, DSO_R_STACK_ERROR);
191 goto err;
192 }
193 /* Success */
194 dso->loaded_filename = filename;
195 return (1);
196 err:
197 /* Cleanup ! */
198 if (filename != NULL)
199 OPENSSL_free(filename);
200 if (p != NULL)
201 OPENSSL_free(p);
202 if (h != NULL)
203 FreeLibrary(h);
204 return (0);
205 }
206
207 static int win32_unload(DSO *dso)
208 {
209 HINSTANCE *p;
210 if (dso == NULL) {
211 DSOerr(DSO_F_WIN32_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
212 return (0);
213 }
214 if (sk_void_num(dso->meth_data) < 1)
215 return (1);
216 p = sk_void_pop(dso->meth_data);
217 if (p == NULL) {
218 DSOerr(DSO_F_WIN32_UNLOAD, DSO_R_NULL_HANDLE);
219 return (0);
220 }
221 if (!FreeLibrary(*p)) {
222 DSOerr(DSO_F_WIN32_UNLOAD, DSO_R_UNLOAD_FAILED);
223 /*
224 * We should push the value back onto the stack in case of a retry.
225 */
226 sk_void_push(dso->meth_data, p);
227 return (0);
228 }
229 /* Cleanup */
230 OPENSSL_free(p);
231 return (1);
232 }
233
234 /*
235 * Using GetProcAddress for variables? TODO: Check this out in the Win32 API
236 * docs, there's probably a variant for variables.
237 */
238 static void *win32_bind_var(DSO *dso, const char *symname)
239 {
240 HINSTANCE *ptr;
241 void *sym;
242
243 if ((dso == NULL) || (symname == NULL)) {
244 DSOerr(DSO_F_WIN32_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
245 return (NULL);
246 }
247 if (sk_void_num(dso->meth_data) < 1) {
248 DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_STACK_ERROR);
249 return (NULL);
250 }
251 ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
252 if (ptr == NULL) {
253 DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_NULL_HANDLE);
254 return (NULL);
255 }
256 sym = GetProcAddress(*ptr, symname);
257 if (sym == NULL) {
258 DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_SYM_FAILURE);
259 ERR_add_error_data(3, "symname(", symname, ")");
260 return (NULL);
261 }
262 return (sym);
263 }
264
265 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
266 {
267 HINSTANCE *ptr;
268 void *sym;
269
270 if ((dso == NULL) || (symname == NULL)) {
271 DSOerr(DSO_F_WIN32_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
272 return (NULL);
273 }
274 if (sk_void_num(dso->meth_data) < 1) {
275 DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_STACK_ERROR);
276 return (NULL);
277 }
278 ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
279 if (ptr == NULL) {
280 DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_NULL_HANDLE);
281 return (NULL);
282 }
283 sym = GetProcAddress(*ptr, symname);
284 if (sym == NULL) {
285 DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_SYM_FAILURE);
286 ERR_add_error_data(3, "symname(", symname, ")");
287 return (NULL);
288 }
289 return ((DSO_FUNC_TYPE)sym);
290 }
291
292 struct file_st {
293 const char *node;
294 int nodelen;
295 const char *device;
296 int devicelen;
297 const char *predir;
298 int predirlen;
299 const char *dir;
300 int dirlen;
301 const char *file;
302 int filelen;
303 };
304
305 static struct file_st *win32_splitter(DSO *dso, const char *filename,
306 int assume_last_is_dir)
307 {
308 struct file_st *result = NULL;
309 enum { IN_NODE, IN_DEVICE, IN_FILE } position;
310 const char *start = filename;
311 char last;
312
313 if (!filename) {
314 DSOerr(DSO_F_WIN32_SPLITTER, DSO_R_NO_FILENAME);
315 /*
316 * goto err;
317 */
318 return (NULL);
319 }
320
321 result = OPENSSL_malloc(sizeof(struct file_st));
322 if (result == NULL) {
323 DSOerr(DSO_F_WIN32_SPLITTER, ERR_R_MALLOC_FAILURE);
324 return (NULL);
325 }
326
327 memset(result, 0, sizeof(struct file_st));
328 position = IN_DEVICE;
329
330 if ((filename[0] == '\\' && filename[1] == '\\')
331 || (filename[0] == '/' && filename[1] == '/')) {
332 position = IN_NODE;
333 filename += 2;
334 start = filename;
335 result->node = start;
336 }
337
338 do {
339 last = filename[0];
340 switch (last) {
341 case ':':
342 if (position != IN_DEVICE) {
343 DSOerr(DSO_F_WIN32_SPLITTER, DSO_R_INCORRECT_FILE_SYNTAX);
344 /*
345 * goto err;
346 */
347 OPENSSL_free(result);
348 return (NULL);
349 }
350 result->device = start;
351 result->devicelen = (int)(filename - start);
352 position = IN_FILE;
353 start = ++filename;
354 result->dir = start;
355 break;
356 case '\\':
357 case '/':
358 if (position == IN_NODE) {
359 result->nodelen = (int)(filename - start);
360 position = IN_FILE;
361 start = ++filename;
362 result->dir = start;
363 } else if (position == IN_DEVICE) {
364 position = IN_FILE;
365 filename++;
366 result->dir = start;
367 result->dirlen = (int)(filename - start);
368 start = filename;
369 } else {
370 filename++;
371 result->dirlen += (int)(filename - start);
372 start = filename;
373 }
374 break;
375 case '\0':
376 if (position == IN_NODE) {
377 result->nodelen = (int)(filename - start);
378 } else {
379 if (filename - start > 0) {
380 if (assume_last_is_dir) {
381 if (position == IN_DEVICE) {
382 result->dir = start;
383 result->dirlen = 0;
384 }
385 result->dirlen += (int)(filename - start);
386 } else {
387 result->file = start;
388 result->filelen = (int)(filename - start);
389 }
390 }
391 }
392 break;
393 default:
394 filename++;
395 break;
396 }
397 }
398 while (last);
399
400 if (!result->nodelen)
401 result->node = NULL;
402 if (!result->devicelen)
403 result->device = NULL;
404 if (!result->dirlen)
405 result->dir = NULL;
406 if (!result->filelen)
407 result->file = NULL;
408
409 return (result);
410 }
411
412 static char *win32_joiner(DSO *dso, const struct file_st *file_split)
413 {
414 int len = 0, offset = 0;
415 char *result = NULL;
416 const char *start;
417
418 if (!file_split) {
419 DSOerr(DSO_F_WIN32_JOINER, ERR_R_PASSED_NULL_PARAMETER);
420 return (NULL);
421 }
422 if (file_split->node) {
423 len += 2 + file_split->nodelen; /* 2 for starting \\ */
424 if (file_split->predir || file_split->dir || file_split->file)
425 len++; /* 1 for ending \ */
426 } else if (file_split->device) {
427 len += file_split->devicelen + 1; /* 1 for ending : */
428 }
429 len += file_split->predirlen;
430 if (file_split->predir && (file_split->dir || file_split->file)) {
431 len++; /* 1 for ending \ */
432 }
433 len += file_split->dirlen;
434 if (file_split->dir && file_split->file) {
435 len++; /* 1 for ending \ */
436 }
437 len += file_split->filelen;
438
439 if (!len) {
440 DSOerr(DSO_F_WIN32_JOINER, DSO_R_EMPTY_FILE_STRUCTURE);
441 return (NULL);
442 }
443
444 result = OPENSSL_malloc(len + 1);
445 if (!result) {
446 DSOerr(DSO_F_WIN32_JOINER, ERR_R_MALLOC_FAILURE);
447 return (NULL);
448 }
449
450 if (file_split->node) {
451 strcpy(&result[offset], "\\\\");
452 offset += 2;
453 strncpy(&result[offset], file_split->node, file_split->nodelen);
454 offset += file_split->nodelen;
455 if (file_split->predir || file_split->dir || file_split->file) {
456 result[offset] = '\\';
457 offset++;
458 }
459 } else if (file_split->device) {
460 strncpy(&result[offset], file_split->device, file_split->devicelen);
461 offset += file_split->devicelen;
462 result[offset] = ':';
463 offset++;
464 }
465 start = file_split->predir;
466 while (file_split->predirlen > (start - file_split->predir)) {
467 const char *end = openssl_strnchr(start, '/',
468 file_split->predirlen - (start -
469 file_split->predir));
470 if (!end)
471 end = start
472 + file_split->predirlen - (start - file_split->predir);
473 strncpy(&result[offset], start, end - start);
474 offset += (int)(end - start);
475 result[offset] = '\\';
476 offset++;
477 start = end + 1;
478 }
479 # if 0 /* Not needed, since the directory converter
480 * above already appeneded a backslash */
481 if (file_split->predir && (file_split->dir || file_split->file)) {
482 result[offset] = '\\';
483 offset++;
484 }
485 # endif
486 start = file_split->dir;
487 while (file_split->dirlen > (start - file_split->dir)) {
488 const char *end = openssl_strnchr(start, '/',
489 file_split->dirlen - (start -
490 file_split->dir));
491 if (!end)
492 end = start + file_split->dirlen - (start - file_split->dir);
493 strncpy(&result[offset], start, end - start);
494 offset += (int)(end - start);
495 result[offset] = '\\';
496 offset++;
497 start = end + 1;
498 }
499 # if 0 /* Not needed, since the directory converter
500 * above already appeneded a backslash */
501 if (file_split->dir && file_split->file) {
502 result[offset] = '\\';
503 offset++;
504 }
505 # endif
506 strncpy(&result[offset], file_split->file, file_split->filelen);
507 offset += file_split->filelen;
508 result[offset] = '\0';
509 return (result);
510 }
511
512 static char *win32_merger(DSO *dso, const char *filespec1,
513 const char *filespec2)
514 {
515 char *merged = NULL;
516 struct file_st *filespec1_split = NULL;
517 struct file_st *filespec2_split = NULL;
518
519 if (!filespec1 && !filespec2) {
520 DSOerr(DSO_F_WIN32_MERGER, ERR_R_PASSED_NULL_PARAMETER);
521 return (NULL);
522 }
523 if (!filespec2) {
524 merged = OPENSSL_malloc(strlen(filespec1) + 1);
525 if (!merged) {
526 DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
527 return (NULL);
528 }
529 strcpy(merged, filespec1);
530 } else if (!filespec1) {
531 merged = OPENSSL_malloc(strlen(filespec2) + 1);
532 if (!merged) {
533 DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
534 return (NULL);
535 }
536 strcpy(merged, filespec2);
537 } else {
538 filespec1_split = win32_splitter(dso, filespec1, 0);
539 if (!filespec1_split) {
540 DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
541 return (NULL);
542 }
543 filespec2_split = win32_splitter(dso, filespec2, 1);
544 if (!filespec2_split) {
545 DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
546 OPENSSL_free(filespec1_split);
547 return (NULL);
548 }
549
550 /* Fill in into filespec1_split */
551 if (!filespec1_split->node && !filespec1_split->device) {
552 filespec1_split->node = filespec2_split->node;
553 filespec1_split->nodelen = filespec2_split->nodelen;
554 filespec1_split->device = filespec2_split->device;
555 filespec1_split->devicelen = filespec2_split->devicelen;
556 }
557 if (!filespec1_split->dir) {
558 filespec1_split->dir = filespec2_split->dir;
559 filespec1_split->dirlen = filespec2_split->dirlen;
560 } else if (filespec1_split->dir[0] != '\\'
561 && filespec1_split->dir[0] != '/') {
562 filespec1_split->predir = filespec2_split->dir;
563 filespec1_split->predirlen = filespec2_split->dirlen;
564 }
565 if (!filespec1_split->file) {
566 filespec1_split->file = filespec2_split->file;
567 filespec1_split->filelen = filespec2_split->filelen;
568 }
569
570 merged = win32_joiner(dso, filespec1_split);
571 }
572 OPENSSL_free(filespec1_split);
573 OPENSSL_free(filespec2_split);
574 return (merged);
575 }
576
577 static char *win32_name_converter(DSO *dso, const char *filename)
578 {
579 char *translated;
580 int len, transform;
581
582 len = strlen(filename);
583 transform = ((strstr(filename, "/") == NULL) &&
584 (strstr(filename, "\\") == NULL) &&
585 (strstr(filename, ":") == NULL));
586 if (transform)
587 /* We will convert this to "%s.dll" */
588 translated = OPENSSL_malloc(len + 5);
589 else
590 /* We will simply duplicate filename */
591 translated = OPENSSL_malloc(len + 1);
592 if (translated == NULL) {
593 DSOerr(DSO_F_WIN32_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
594 return (NULL);
595 }
596 if (transform)
597 sprintf(translated, "%s.dll", filename);
598 else
599 sprintf(translated, "%s", filename);
600 return (translated);
601 }
602
603 static const char *openssl_strnchr(const char *string, int c, size_t len)
604 {
605 size_t i;
606 const char *p;
607 for (i = 0, p = string; i < len && *p; i++, p++) {
608 if (*p == c)
609 return p;
610 }
611 return NULL;
612 }
613
614 # include <tlhelp32.h>
615 # ifdef _WIN32_WCE
616 # define DLLNAME "TOOLHELP.DLL"
617 # else
618 # ifdef MODULEENTRY32
619 # undef MODULEENTRY32 /* unmask the ASCII version! */
620 # endif
621 # define DLLNAME "KERNEL32.DLL"
622 # endif
623
624 typedef HANDLE(WINAPI *CREATETOOLHELP32SNAPSHOT) (DWORD, DWORD);
625 typedef BOOL(WINAPI *CLOSETOOLHELP32SNAPSHOT) (HANDLE);
626 typedef BOOL(WINAPI *MODULE32) (HANDLE, MODULEENTRY32 *);
627
628 static int win32_pathbyaddr(void *addr, char *path, int sz)
629 {
630 HMODULE dll;
631 HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
632 MODULEENTRY32 me32;
633 CREATETOOLHELP32SNAPSHOT create_snap;
634 CLOSETOOLHELP32SNAPSHOT close_snap;
635 MODULE32 module_first, module_next;
636
637 if (addr == NULL) {
638 union {
639 int (*f) (void *, char *, int);
640 void *p;
641 } t = {
642 win32_pathbyaddr
643 };
644 addr = t.p;
645 }
646
647 dll = LoadLibrary(TEXT(DLLNAME));
648 if (dll == NULL) {
649 DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
650 return -1;
651 }
652
653 create_snap = (CREATETOOLHELP32SNAPSHOT)
654 GetProcAddress(dll, "CreateToolhelp32Snapshot");
655 if (create_snap == NULL) {
656 FreeLibrary(dll);
657 DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
658 return -1;
659 }
660 /* We take the rest for granted... */
661 # ifdef _WIN32_WCE
662 close_snap = (CLOSETOOLHELP32SNAPSHOT)
663 GetProcAddress(dll, "CloseToolhelp32Snapshot");
664 # else
665 close_snap = (CLOSETOOLHELP32SNAPSHOT) CloseHandle;
666 # endif
667 module_first = (MODULE32) GetProcAddress(dll, "Module32First");
668 module_next = (MODULE32) GetProcAddress(dll, "Module32Next");
669
670 hModuleSnap = (*create_snap) (TH32CS_SNAPMODULE, 0);
671 if (hModuleSnap == INVALID_HANDLE_VALUE) {
672 FreeLibrary(dll);
673 DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
674 return -1;
675 }
676
677 me32.dwSize = sizeof(me32);
678
679 if (!(*module_first) (hModuleSnap, &me32)) {
680 (*close_snap) (hModuleSnap);
681 FreeLibrary(dll);
682 DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_FAILURE);
683 return -1;
684 }
685
686 do {
687 if ((BYTE *) addr >= me32.modBaseAddr &&
688 (BYTE *) addr < me32.modBaseAddr + me32.modBaseSize) {
689 (*close_snap) (hModuleSnap);
690 FreeLibrary(dll);
691 # ifdef _WIN32_WCE
692 # if _WIN32_WCE >= 101
693 return WideCharToMultiByte(CP_ACP, 0, me32.szExePath, -1,
694 path, sz, NULL, NULL);
695 # else
696 {
697 int i, len = (int)wcslen(me32.szExePath);
698 if (sz <= 0)
699 return len + 1;
700 if (len >= sz)
701 len = sz - 1;
702 for (i = 0; i < len; i++)
703 path[i] = (char)me32.szExePath[i];
704 path[len++] = 0;
705 return len;
706 }
707 # endif
708 # else
709 {
710 int len = (int)strlen(me32.szExePath);
711 if (sz <= 0)
712 return len + 1;
713 if (len >= sz)
714 len = sz - 1;
715 memcpy(path, me32.szExePath, len);
716 path[len++] = 0;
717 return len;
718 }
719 # endif
720 }
721 } while ((*module_next) (hModuleSnap, &me32));
722
723 (*close_snap) (hModuleSnap);
724 FreeLibrary(dll);
725 return 0;
726 }
727
728 static void *win32_globallookup(const char *name)
729 {
730 HMODULE dll;
731 HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
732 MODULEENTRY32 me32;
733 CREATETOOLHELP32SNAPSHOT create_snap;
734 CLOSETOOLHELP32SNAPSHOT close_snap;
735 MODULE32 module_first, module_next;
736 FARPROC ret = NULL;
737
738 dll = LoadLibrary(TEXT(DLLNAME));
739 if (dll == NULL) {
740 DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
741 return NULL;
742 }
743
744 create_snap = (CREATETOOLHELP32SNAPSHOT)
745 GetProcAddress(dll, "CreateToolhelp32Snapshot");
746 if (create_snap == NULL) {
747 FreeLibrary(dll);
748 DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
749 return NULL;
750 }
751 /* We take the rest for granted... */
752 # ifdef _WIN32_WCE
753 close_snap = (CLOSETOOLHELP32SNAPSHOT)
754 GetProcAddress(dll, "CloseToolhelp32Snapshot");
755 # else
756 close_snap = (CLOSETOOLHELP32SNAPSHOT) CloseHandle;
757 # endif
758 module_first = (MODULE32) GetProcAddress(dll, "Module32First");
759 module_next = (MODULE32) GetProcAddress(dll, "Module32Next");
760
761 hModuleSnap = (*create_snap) (TH32CS_SNAPMODULE, 0);
762 if (hModuleSnap == INVALID_HANDLE_VALUE) {
763 FreeLibrary(dll);
764 DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
765 return NULL;
766 }
767
768 me32.dwSize = sizeof(me32);
769
770 if (!(*module_first) (hModuleSnap, &me32)) {
771 (*close_snap) (hModuleSnap);
772 FreeLibrary(dll);
773 return NULL;
774 }
775
776 do {
777 if ((ret = GetProcAddress(me32.hModule, name))) {
778 (*close_snap) (hModuleSnap);
779 FreeLibrary(dll);
780 return ret;
781 }
782 } while ((*module_next) (hModuleSnap, &me32));
783
784 (*close_snap) (hModuleSnap);
785 FreeLibrary(dll);
786 return NULL;
787 }
788 #endif /* DSO_WIN32 */
Tomato firmware and modifications.