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1 | /* |
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2 | * winmisc.c: miscellaneous Windows-specific things |
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3 | */ |
4 | |
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5 | #include <stdio.h> |
6 | #include <stdlib.h> |
7 | #include "putty.h" |
8 | |
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9 | OSVERSIONINFO osVersion; |
10 | |
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11 | void platform_get_x11_auth(char *display, int *proto, |
12 | unsigned char *data, int *datalen) |
13 | { |
14 | /* We don't support this at all under Windows. */ |
15 | } |
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16 | |
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17 | const char platform_x11_best_transport[] = "localhost"; |
18 | |
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19 | char *platform_get_x_display(void) { |
20 | /* We may as well check for DISPLAY in case it's useful. */ |
21 | return dupstr(getenv("DISPLAY")); |
22 | } |
23 | |
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24 | Filename filename_from_str(const char *str) |
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25 | { |
26 | Filename ret; |
27 | strncpy(ret.path, str, sizeof(ret.path)); |
28 | ret.path[sizeof(ret.path)-1] = '\0'; |
29 | return ret; |
30 | } |
31 | |
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32 | const char *filename_to_str(const Filename *fn) |
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33 | { |
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34 | return fn->path; |
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35 | } |
36 | |
37 | int filename_equal(Filename f1, Filename f2) |
38 | { |
39 | return !strcmp(f1.path, f2.path); |
40 | } |
41 | |
42 | int filename_is_null(Filename fn) |
43 | { |
44 | return !*fn.path; |
45 | } |
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46 | |
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47 | char *get_username(void) |
48 | { |
49 | DWORD namelen; |
50 | char *user; |
51 | |
52 | namelen = 0; |
53 | if (GetUserName(NULL, &namelen) == FALSE) |
54 | return NULL; |
55 | |
56 | user = snewn(namelen, char); |
57 | GetUserName(user, &namelen); |
58 | |
59 | return user; |
60 | } |
61 | |
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62 | int SaneDialogBox(HINSTANCE hinst, |
63 | LPCTSTR tmpl, |
64 | HWND hwndparent, |
65 | DLGPROC lpDialogFunc) |
66 | { |
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67 | WNDCLASS wc; |
68 | HWND hwnd; |
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69 | MSG msg; |
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70 | int flags; |
71 | int ret; |
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72 | int gm; |
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73 | |
74 | wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW; |
75 | wc.lpfnWndProc = DefDlgProc; |
76 | wc.cbClsExtra = 0; |
77 | wc.cbWndExtra = DLGWINDOWEXTRA + 8; |
78 | wc.hInstance = hinst; |
79 | wc.hIcon = NULL; |
80 | wc.hCursor = LoadCursor(NULL, IDC_ARROW); |
81 | wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1); |
82 | wc.lpszMenuName = NULL; |
83 | wc.lpszClassName = "PuTTYConfigBox"; |
84 | RegisterClass(&wc); |
85 | |
86 | hwnd = CreateDialog(hinst, tmpl, hwndparent, lpDialogFunc); |
87 | |
88 | SetWindowLong(hwnd, BOXFLAGS, 0); /* flags */ |
89 | SetWindowLong(hwnd, BOXRESULT, 0); /* result from SaneEndDialog */ |
90 | |
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91 | while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) { |
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92 | flags=GetWindowLong(hwnd, BOXFLAGS); |
93 | if (!(flags & DF_END) && !IsDialogMessage(hwnd, &msg)) |
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94 | DispatchMessage(&msg); |
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95 | if (flags & DF_END) |
96 | break; |
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97 | } |
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98 | |
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99 | if (gm == 0) |
100 | PostQuitMessage(msg.wParam); /* We got a WM_QUIT, pass it on */ |
101 | |
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102 | ret=GetWindowLong(hwnd, BOXRESULT); |
103 | DestroyWindow(hwnd); |
104 | return ret; |
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105 | } |
106 | |
107 | void SaneEndDialog(HWND hwnd, int ret) |
108 | { |
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109 | SetWindowLong(hwnd, BOXRESULT, ret); |
110 | SetWindowLong(hwnd, BOXFLAGS, DF_END); |
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111 | } |
112 | |
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113 | BOOL init_winver(void) |
114 | { |
115 | ZeroMemory(&osVersion, sizeof(osVersion)); |
116 | osVersion.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); |
117 | return GetVersionEx ( (OSVERSIONINFO *) &osVersion); |
118 | } |
119 | |
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120 | #ifdef DEBUG |
121 | static FILE *debug_fp = NULL; |
122 | static HANDLE debug_hdl = INVALID_HANDLE_VALUE; |
123 | static int debug_got_console = 0; |
124 | |
125 | void dputs(char *buf) |
126 | { |
127 | DWORD dw; |
128 | |
129 | if (!debug_got_console) { |
130 | if (AllocConsole()) { |
131 | debug_got_console = 1; |
132 | debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE); |
133 | } |
134 | } |
135 | if (!debug_fp) { |
136 | debug_fp = fopen("debug.log", "w"); |
137 | } |
138 | |
139 | if (debug_hdl != INVALID_HANDLE_VALUE) { |
140 | WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL); |
141 | } |
142 | fputs(buf, debug_fp); |
143 | fflush(debug_fp); |
144 | } |
145 | #endif |
146 | |
147 | #ifdef MINEFIELD |
148 | /* |
149 | * Minefield - a Windows equivalent for Electric Fence |
150 | */ |
151 | |
152 | #define PAGESIZE 4096 |
153 | |
154 | /* |
155 | * Design: |
156 | * |
157 | * We start by reserving as much virtual address space as Windows |
158 | * will sensibly (or not sensibly) let us have. We flag it all as |
159 | * invalid memory. |
160 | * |
161 | * Any allocation attempt is satisfied by committing one or more |
162 | * pages, with an uncommitted page on either side. The returned |
163 | * memory region is jammed up against the _end_ of the pages. |
164 | * |
165 | * Freeing anything causes instantaneous decommitment of the pages |
166 | * involved, so stale pointers are caught as soon as possible. |
167 | */ |
168 | |
169 | static int minefield_initialised = 0; |
170 | static void *minefield_region = NULL; |
171 | static long minefield_size = 0; |
172 | static long minefield_npages = 0; |
173 | static long minefield_curpos = 0; |
174 | static unsigned short *minefield_admin = NULL; |
175 | static void *minefield_pages = NULL; |
176 | |
177 | static void minefield_admin_hide(int hide) |
178 | { |
179 | int access = hide ? PAGE_NOACCESS : PAGE_READWRITE; |
180 | VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL); |
181 | } |
182 | |
183 | static void minefield_init(void) |
184 | { |
185 | int size; |
186 | int admin_size; |
187 | int i; |
188 | |
189 | for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) { |
190 | minefield_region = VirtualAlloc(NULL, size, |
191 | MEM_RESERVE, PAGE_NOACCESS); |
192 | if (minefield_region) |
193 | break; |
194 | } |
195 | minefield_size = size; |
196 | |
197 | /* |
198 | * Firstly, allocate a section of that to be the admin block. |
199 | * We'll need a two-byte field for each page. |
200 | */ |
201 | minefield_admin = minefield_region; |
202 | minefield_npages = minefield_size / PAGESIZE; |
203 | admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1); |
204 | minefield_npages = (minefield_size - admin_size) / PAGESIZE; |
205 | minefield_pages = (char *) minefield_region + admin_size; |
206 | |
207 | /* |
208 | * Commit the admin region. |
209 | */ |
210 | VirtualAlloc(minefield_admin, minefield_npages * 2, |
211 | MEM_COMMIT, PAGE_READWRITE); |
212 | |
213 | /* |
214 | * Mark all pages as unused (0xFFFF). |
215 | */ |
216 | for (i = 0; i < minefield_npages; i++) |
217 | minefield_admin[i] = 0xFFFF; |
218 | |
219 | /* |
220 | * Hide the admin region. |
221 | */ |
222 | minefield_admin_hide(1); |
223 | |
224 | minefield_initialised = 1; |
225 | } |
226 | |
227 | static void minefield_bomb(void) |
228 | { |
229 | div(1, *(int *) minefield_pages); |
230 | } |
231 | |
232 | static void *minefield_alloc(int size) |
233 | { |
234 | int npages; |
235 | int pos, lim, region_end, region_start; |
236 | int start; |
237 | int i; |
238 | |
239 | npages = (size + PAGESIZE - 1) / PAGESIZE; |
240 | |
241 | minefield_admin_hide(0); |
242 | |
243 | /* |
244 | * Search from current position until we find a contiguous |
245 | * bunch of npages+2 unused pages. |
246 | */ |
247 | pos = minefield_curpos; |
248 | lim = minefield_npages; |
249 | while (1) { |
250 | /* Skip over used pages. */ |
251 | while (pos < lim && minefield_admin[pos] != 0xFFFF) |
252 | pos++; |
253 | /* Count unused pages. */ |
254 | start = pos; |
255 | while (pos < lim && pos - start < npages + 2 && |
256 | minefield_admin[pos] == 0xFFFF) |
257 | pos++; |
258 | if (pos - start == npages + 2) |
259 | break; |
260 | /* If we've reached the limit, reset the limit or stop. */ |
261 | if (pos >= lim) { |
262 | if (lim == minefield_npages) { |
263 | /* go round and start again at zero */ |
264 | lim = minefield_curpos; |
265 | pos = 0; |
266 | } else { |
267 | minefield_admin_hide(1); |
268 | return NULL; |
269 | } |
270 | } |
271 | } |
272 | |
273 | minefield_curpos = pos - 1; |
274 | |
275 | /* |
276 | * We have npages+2 unused pages starting at start. We leave |
277 | * the first and last of these alone and use the rest. |
278 | */ |
279 | region_end = (start + npages + 1) * PAGESIZE; |
280 | region_start = region_end - size; |
281 | /* FIXME: could align here if we wanted */ |
282 | |
283 | /* |
284 | * Update the admin region. |
285 | */ |
286 | for (i = start + 2; i < start + npages + 1; i++) |
287 | minefield_admin[i] = 0xFFFE; /* used but no region starts here */ |
288 | minefield_admin[start + 1] = region_start % PAGESIZE; |
289 | |
290 | minefield_admin_hide(1); |
291 | |
292 | VirtualAlloc((char *) minefield_pages + region_start, size, |
293 | MEM_COMMIT, PAGE_READWRITE); |
294 | return (char *) minefield_pages + region_start; |
295 | } |
296 | |
297 | static void minefield_free(void *ptr) |
298 | { |
299 | int region_start, i, j; |
300 | |
301 | minefield_admin_hide(0); |
302 | |
303 | region_start = (char *) ptr - (char *) minefield_pages; |
304 | i = region_start / PAGESIZE; |
305 | if (i < 0 || i >= minefield_npages || |
306 | minefield_admin[i] != region_start % PAGESIZE) |
307 | minefield_bomb(); |
308 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) { |
309 | minefield_admin[j] = 0xFFFF; |
310 | } |
311 | |
312 | VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT); |
313 | |
314 | minefield_admin_hide(1); |
315 | } |
316 | |
317 | static int minefield_get_size(void *ptr) |
318 | { |
319 | int region_start, i, j; |
320 | |
321 | minefield_admin_hide(0); |
322 | |
323 | region_start = (char *) ptr - (char *) minefield_pages; |
324 | i = region_start / PAGESIZE; |
325 | if (i < 0 || i >= minefield_npages || |
326 | minefield_admin[i] != region_start % PAGESIZE) |
327 | minefield_bomb(); |
328 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++); |
329 | |
330 | minefield_admin_hide(1); |
331 | |
332 | return j * PAGESIZE - region_start; |
333 | } |
334 | |
335 | void *minefield_c_malloc(size_t size) |
336 | { |
337 | if (!minefield_initialised) |
338 | minefield_init(); |
339 | return minefield_alloc(size); |
340 | } |
341 | |
342 | void minefield_c_free(void *p) |
343 | { |
344 | if (!minefield_initialised) |
345 | minefield_init(); |
346 | minefield_free(p); |
347 | } |
348 | |
349 | /* |
350 | * realloc _always_ moves the chunk, for rapid detection of code |
351 | * that assumes it won't. |
352 | */ |
353 | void *minefield_c_realloc(void *p, size_t size) |
354 | { |
355 | size_t oldsize; |
356 | void *q; |
357 | if (!minefield_initialised) |
358 | minefield_init(); |
359 | q = minefield_alloc(size); |
360 | oldsize = minefield_get_size(p); |
361 | memcpy(q, p, (oldsize < size ? oldsize : size)); |
362 | minefield_free(p); |
363 | return q; |
364 | } |
365 | |
366 | #endif /* MINEFIELD */ |