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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 | Filename filename_from_str(const char *str) |
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20 | { |
21 | Filename ret; |
22 | strncpy(ret.path, str, sizeof(ret.path)); |
23 | ret.path[sizeof(ret.path)-1] = '\0'; |
24 | return ret; |
25 | } |
26 | |
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27 | const char *filename_to_str(const Filename *fn) |
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28 | { |
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29 | return fn->path; |
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30 | } |
31 | |
32 | int filename_equal(Filename f1, Filename f2) |
33 | { |
34 | return !strcmp(f1.path, f2.path); |
35 | } |
36 | |
37 | int filename_is_null(Filename fn) |
38 | { |
39 | return !*fn.path; |
40 | } |
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41 | |
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42 | char *get_username(void) |
43 | { |
44 | DWORD namelen; |
45 | char *user; |
46 | |
47 | namelen = 0; |
48 | if (GetUserName(NULL, &namelen) == FALSE) |
49 | return NULL; |
50 | |
51 | user = snewn(namelen, char); |
52 | GetUserName(user, &namelen); |
53 | |
54 | return user; |
55 | } |
56 | |
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57 | int SaneDialogBox(HINSTANCE hinst, |
58 | LPCTSTR tmpl, |
59 | HWND hwndparent, |
60 | DLGPROC lpDialogFunc) |
61 | { |
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62 | WNDCLASS wc; |
63 | HWND hwnd; |
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64 | MSG msg; |
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65 | int flags; |
66 | int ret; |
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67 | int gm; |
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68 | |
69 | wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW; |
70 | wc.lpfnWndProc = DefDlgProc; |
71 | wc.cbClsExtra = 0; |
72 | wc.cbWndExtra = DLGWINDOWEXTRA + 8; |
73 | wc.hInstance = hinst; |
74 | wc.hIcon = NULL; |
75 | wc.hCursor = LoadCursor(NULL, IDC_ARROW); |
76 | wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1); |
77 | wc.lpszMenuName = NULL; |
78 | wc.lpszClassName = "PuTTYConfigBox"; |
79 | RegisterClass(&wc); |
80 | |
81 | hwnd = CreateDialog(hinst, tmpl, hwndparent, lpDialogFunc); |
82 | |
83 | SetWindowLong(hwnd, BOXFLAGS, 0); /* flags */ |
84 | SetWindowLong(hwnd, BOXRESULT, 0); /* result from SaneEndDialog */ |
85 | |
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86 | while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) { |
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87 | flags=GetWindowLong(hwnd, BOXFLAGS); |
88 | if (!(flags & DF_END) && !IsDialogMessage(hwnd, &msg)) |
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89 | DispatchMessage(&msg); |
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90 | if (flags & DF_END) |
91 | break; |
8ee3ff16 |
92 | } |
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93 | |
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94 | if (gm == 0) |
95 | PostQuitMessage(msg.wParam); /* We got a WM_QUIT, pass it on */ |
96 | |
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97 | ret=GetWindowLong(hwnd, BOXRESULT); |
98 | DestroyWindow(hwnd); |
99 | return ret; |
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100 | } |
101 | |
102 | void SaneEndDialog(HWND hwnd, int ret) |
103 | { |
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104 | SetWindowLong(hwnd, BOXRESULT, ret); |
105 | SetWindowLong(hwnd, BOXFLAGS, DF_END); |
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106 | } |
107 | |
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108 | BOOL init_winver(void) |
109 | { |
110 | ZeroMemory(&osVersion, sizeof(osVersion)); |
111 | osVersion.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); |
112 | return GetVersionEx ( (OSVERSIONINFO *) &osVersion); |
113 | } |
114 | |
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115 | #ifdef DEBUG |
116 | static FILE *debug_fp = NULL; |
117 | static HANDLE debug_hdl = INVALID_HANDLE_VALUE; |
118 | static int debug_got_console = 0; |
119 | |
120 | void dputs(char *buf) |
121 | { |
122 | DWORD dw; |
123 | |
124 | if (!debug_got_console) { |
125 | if (AllocConsole()) { |
126 | debug_got_console = 1; |
127 | debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE); |
128 | } |
129 | } |
130 | if (!debug_fp) { |
131 | debug_fp = fopen("debug.log", "w"); |
132 | } |
133 | |
134 | if (debug_hdl != INVALID_HANDLE_VALUE) { |
135 | WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL); |
136 | } |
137 | fputs(buf, debug_fp); |
138 | fflush(debug_fp); |
139 | } |
140 | #endif |
141 | |
142 | #ifdef MINEFIELD |
143 | /* |
144 | * Minefield - a Windows equivalent for Electric Fence |
145 | */ |
146 | |
147 | #define PAGESIZE 4096 |
148 | |
149 | /* |
150 | * Design: |
151 | * |
152 | * We start by reserving as much virtual address space as Windows |
153 | * will sensibly (or not sensibly) let us have. We flag it all as |
154 | * invalid memory. |
155 | * |
156 | * Any allocation attempt is satisfied by committing one or more |
157 | * pages, with an uncommitted page on either side. The returned |
158 | * memory region is jammed up against the _end_ of the pages. |
159 | * |
160 | * Freeing anything causes instantaneous decommitment of the pages |
161 | * involved, so stale pointers are caught as soon as possible. |
162 | */ |
163 | |
164 | static int minefield_initialised = 0; |
165 | static void *minefield_region = NULL; |
166 | static long minefield_size = 0; |
167 | static long minefield_npages = 0; |
168 | static long minefield_curpos = 0; |
169 | static unsigned short *minefield_admin = NULL; |
170 | static void *minefield_pages = NULL; |
171 | |
172 | static void minefield_admin_hide(int hide) |
173 | { |
174 | int access = hide ? PAGE_NOACCESS : PAGE_READWRITE; |
175 | VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL); |
176 | } |
177 | |
178 | static void minefield_init(void) |
179 | { |
180 | int size; |
181 | int admin_size; |
182 | int i; |
183 | |
184 | for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) { |
185 | minefield_region = VirtualAlloc(NULL, size, |
186 | MEM_RESERVE, PAGE_NOACCESS); |
187 | if (minefield_region) |
188 | break; |
189 | } |
190 | minefield_size = size; |
191 | |
192 | /* |
193 | * Firstly, allocate a section of that to be the admin block. |
194 | * We'll need a two-byte field for each page. |
195 | */ |
196 | minefield_admin = minefield_region; |
197 | minefield_npages = minefield_size / PAGESIZE; |
198 | admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1); |
199 | minefield_npages = (minefield_size - admin_size) / PAGESIZE; |
200 | minefield_pages = (char *) minefield_region + admin_size; |
201 | |
202 | /* |
203 | * Commit the admin region. |
204 | */ |
205 | VirtualAlloc(minefield_admin, minefield_npages * 2, |
206 | MEM_COMMIT, PAGE_READWRITE); |
207 | |
208 | /* |
209 | * Mark all pages as unused (0xFFFF). |
210 | */ |
211 | for (i = 0; i < minefield_npages; i++) |
212 | minefield_admin[i] = 0xFFFF; |
213 | |
214 | /* |
215 | * Hide the admin region. |
216 | */ |
217 | minefield_admin_hide(1); |
218 | |
219 | minefield_initialised = 1; |
220 | } |
221 | |
222 | static void minefield_bomb(void) |
223 | { |
224 | div(1, *(int *) minefield_pages); |
225 | } |
226 | |
227 | static void *minefield_alloc(int size) |
228 | { |
229 | int npages; |
230 | int pos, lim, region_end, region_start; |
231 | int start; |
232 | int i; |
233 | |
234 | npages = (size + PAGESIZE - 1) / PAGESIZE; |
235 | |
236 | minefield_admin_hide(0); |
237 | |
238 | /* |
239 | * Search from current position until we find a contiguous |
240 | * bunch of npages+2 unused pages. |
241 | */ |
242 | pos = minefield_curpos; |
243 | lim = minefield_npages; |
244 | while (1) { |
245 | /* Skip over used pages. */ |
246 | while (pos < lim && minefield_admin[pos] != 0xFFFF) |
247 | pos++; |
248 | /* Count unused pages. */ |
249 | start = pos; |
250 | while (pos < lim && pos - start < npages + 2 && |
251 | minefield_admin[pos] == 0xFFFF) |
252 | pos++; |
253 | if (pos - start == npages + 2) |
254 | break; |
255 | /* If we've reached the limit, reset the limit or stop. */ |
256 | if (pos >= lim) { |
257 | if (lim == minefield_npages) { |
258 | /* go round and start again at zero */ |
259 | lim = minefield_curpos; |
260 | pos = 0; |
261 | } else { |
262 | minefield_admin_hide(1); |
263 | return NULL; |
264 | } |
265 | } |
266 | } |
267 | |
268 | minefield_curpos = pos - 1; |
269 | |
270 | /* |
271 | * We have npages+2 unused pages starting at start. We leave |
272 | * the first and last of these alone and use the rest. |
273 | */ |
274 | region_end = (start + npages + 1) * PAGESIZE; |
275 | region_start = region_end - size; |
276 | /* FIXME: could align here if we wanted */ |
277 | |
278 | /* |
279 | * Update the admin region. |
280 | */ |
281 | for (i = start + 2; i < start + npages + 1; i++) |
282 | minefield_admin[i] = 0xFFFE; /* used but no region starts here */ |
283 | minefield_admin[start + 1] = region_start % PAGESIZE; |
284 | |
285 | minefield_admin_hide(1); |
286 | |
287 | VirtualAlloc((char *) minefield_pages + region_start, size, |
288 | MEM_COMMIT, PAGE_READWRITE); |
289 | return (char *) minefield_pages + region_start; |
290 | } |
291 | |
292 | static void minefield_free(void *ptr) |
293 | { |
294 | int region_start, i, j; |
295 | |
296 | minefield_admin_hide(0); |
297 | |
298 | region_start = (char *) ptr - (char *) minefield_pages; |
299 | i = region_start / PAGESIZE; |
300 | if (i < 0 || i >= minefield_npages || |
301 | minefield_admin[i] != region_start % PAGESIZE) |
302 | minefield_bomb(); |
303 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) { |
304 | minefield_admin[j] = 0xFFFF; |
305 | } |
306 | |
307 | VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT); |
308 | |
309 | minefield_admin_hide(1); |
310 | } |
311 | |
312 | static int minefield_get_size(void *ptr) |
313 | { |
314 | int region_start, i, j; |
315 | |
316 | minefield_admin_hide(0); |
317 | |
318 | region_start = (char *) ptr - (char *) minefield_pages; |
319 | i = region_start / PAGESIZE; |
320 | if (i < 0 || i >= minefield_npages || |
321 | minefield_admin[i] != region_start % PAGESIZE) |
322 | minefield_bomb(); |
323 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++); |
324 | |
325 | minefield_admin_hide(1); |
326 | |
327 | return j * PAGESIZE - region_start; |
328 | } |
329 | |
330 | void *minefield_c_malloc(size_t size) |
331 | { |
332 | if (!minefield_initialised) |
333 | minefield_init(); |
334 | return minefield_alloc(size); |
335 | } |
336 | |
337 | void minefield_c_free(void *p) |
338 | { |
339 | if (!minefield_initialised) |
340 | minefield_init(); |
341 | minefield_free(p); |
342 | } |
343 | |
344 | /* |
345 | * realloc _always_ moves the chunk, for rapid detection of code |
346 | * that assumes it won't. |
347 | */ |
348 | void *minefield_c_realloc(void *p, size_t size) |
349 | { |
350 | size_t oldsize; |
351 | void *q; |
352 | if (!minefield_initialised) |
353 | minefield_init(); |
354 | q = minefield_alloc(size); |
355 | oldsize = minefield_get_size(p); |
356 | memcpy(q, p, (oldsize < size ? oldsize : size)); |
357 | minefield_free(p); |
358 | return q; |
359 | } |
360 | |
361 | #endif /* MINEFIELD */ |