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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; |
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53 | if (GetUserName(NULL, &namelen) == FALSE) { |
54 | /* |
55 | * Apparently this doesn't work at least on Windows XP SP2. |
56 | * Thus assume a maximum of 256. It will fail again if it |
57 | * doesn't fit. |
58 | */ |
59 | namelen = 256; |
60 | } |
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61 | |
62 | user = snewn(namelen, char); |
63 | GetUserName(user, &namelen); |
64 | |
65 | return user; |
66 | } |
67 | |
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68 | int SaneDialogBox(HINSTANCE hinst, |
69 | LPCTSTR tmpl, |
70 | HWND hwndparent, |
71 | DLGPROC lpDialogFunc) |
72 | { |
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73 | WNDCLASS wc; |
74 | HWND hwnd; |
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75 | MSG msg; |
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76 | int flags; |
77 | int ret; |
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78 | int gm; |
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79 | |
80 | wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW; |
81 | wc.lpfnWndProc = DefDlgProc; |
82 | wc.cbClsExtra = 0; |
83 | wc.cbWndExtra = DLGWINDOWEXTRA + 8; |
84 | wc.hInstance = hinst; |
85 | wc.hIcon = NULL; |
86 | wc.hCursor = LoadCursor(NULL, IDC_ARROW); |
87 | wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1); |
88 | wc.lpszMenuName = NULL; |
89 | wc.lpszClassName = "PuTTYConfigBox"; |
90 | RegisterClass(&wc); |
91 | |
92 | hwnd = CreateDialog(hinst, tmpl, hwndparent, lpDialogFunc); |
93 | |
94 | SetWindowLong(hwnd, BOXFLAGS, 0); /* flags */ |
95 | SetWindowLong(hwnd, BOXRESULT, 0); /* result from SaneEndDialog */ |
96 | |
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97 | while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) { |
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98 | flags=GetWindowLong(hwnd, BOXFLAGS); |
99 | if (!(flags & DF_END) && !IsDialogMessage(hwnd, &msg)) |
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100 | DispatchMessage(&msg); |
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101 | if (flags & DF_END) |
102 | break; |
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103 | } |
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104 | |
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105 | if (gm == 0) |
106 | PostQuitMessage(msg.wParam); /* We got a WM_QUIT, pass it on */ |
107 | |
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108 | ret=GetWindowLong(hwnd, BOXRESULT); |
109 | DestroyWindow(hwnd); |
110 | return ret; |
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111 | } |
112 | |
113 | void SaneEndDialog(HWND hwnd, int ret) |
114 | { |
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115 | SetWindowLong(hwnd, BOXRESULT, ret); |
116 | SetWindowLong(hwnd, BOXFLAGS, DF_END); |
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117 | } |
118 | |
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119 | BOOL init_winver(void) |
120 | { |
121 | ZeroMemory(&osVersion, sizeof(osVersion)); |
122 | osVersion.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); |
123 | return GetVersionEx ( (OSVERSIONINFO *) &osVersion); |
124 | } |
125 | |
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126 | #ifdef DEBUG |
127 | static FILE *debug_fp = NULL; |
128 | static HANDLE debug_hdl = INVALID_HANDLE_VALUE; |
129 | static int debug_got_console = 0; |
130 | |
131 | void dputs(char *buf) |
132 | { |
133 | DWORD dw; |
134 | |
135 | if (!debug_got_console) { |
136 | if (AllocConsole()) { |
137 | debug_got_console = 1; |
138 | debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE); |
139 | } |
140 | } |
141 | if (!debug_fp) { |
142 | debug_fp = fopen("debug.log", "w"); |
143 | } |
144 | |
145 | if (debug_hdl != INVALID_HANDLE_VALUE) { |
146 | WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL); |
147 | } |
148 | fputs(buf, debug_fp); |
149 | fflush(debug_fp); |
150 | } |
151 | #endif |
152 | |
153 | #ifdef MINEFIELD |
154 | /* |
155 | * Minefield - a Windows equivalent for Electric Fence |
156 | */ |
157 | |
158 | #define PAGESIZE 4096 |
159 | |
160 | /* |
161 | * Design: |
162 | * |
163 | * We start by reserving as much virtual address space as Windows |
164 | * will sensibly (or not sensibly) let us have. We flag it all as |
165 | * invalid memory. |
166 | * |
167 | * Any allocation attempt is satisfied by committing one or more |
168 | * pages, with an uncommitted page on either side. The returned |
169 | * memory region is jammed up against the _end_ of the pages. |
170 | * |
171 | * Freeing anything causes instantaneous decommitment of the pages |
172 | * involved, so stale pointers are caught as soon as possible. |
173 | */ |
174 | |
175 | static int minefield_initialised = 0; |
176 | static void *minefield_region = NULL; |
177 | static long minefield_size = 0; |
178 | static long minefield_npages = 0; |
179 | static long minefield_curpos = 0; |
180 | static unsigned short *minefield_admin = NULL; |
181 | static void *minefield_pages = NULL; |
182 | |
183 | static void minefield_admin_hide(int hide) |
184 | { |
185 | int access = hide ? PAGE_NOACCESS : PAGE_READWRITE; |
186 | VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL); |
187 | } |
188 | |
189 | static void minefield_init(void) |
190 | { |
191 | int size; |
192 | int admin_size; |
193 | int i; |
194 | |
195 | for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) { |
196 | minefield_region = VirtualAlloc(NULL, size, |
197 | MEM_RESERVE, PAGE_NOACCESS); |
198 | if (minefield_region) |
199 | break; |
200 | } |
201 | minefield_size = size; |
202 | |
203 | /* |
204 | * Firstly, allocate a section of that to be the admin block. |
205 | * We'll need a two-byte field for each page. |
206 | */ |
207 | minefield_admin = minefield_region; |
208 | minefield_npages = minefield_size / PAGESIZE; |
209 | admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1); |
210 | minefield_npages = (minefield_size - admin_size) / PAGESIZE; |
211 | minefield_pages = (char *) minefield_region + admin_size; |
212 | |
213 | /* |
214 | * Commit the admin region. |
215 | */ |
216 | VirtualAlloc(minefield_admin, minefield_npages * 2, |
217 | MEM_COMMIT, PAGE_READWRITE); |
218 | |
219 | /* |
220 | * Mark all pages as unused (0xFFFF). |
221 | */ |
222 | for (i = 0; i < minefield_npages; i++) |
223 | minefield_admin[i] = 0xFFFF; |
224 | |
225 | /* |
226 | * Hide the admin region. |
227 | */ |
228 | minefield_admin_hide(1); |
229 | |
230 | minefield_initialised = 1; |
231 | } |
232 | |
233 | static void minefield_bomb(void) |
234 | { |
235 | div(1, *(int *) minefield_pages); |
236 | } |
237 | |
238 | static void *minefield_alloc(int size) |
239 | { |
240 | int npages; |
241 | int pos, lim, region_end, region_start; |
242 | int start; |
243 | int i; |
244 | |
245 | npages = (size + PAGESIZE - 1) / PAGESIZE; |
246 | |
247 | minefield_admin_hide(0); |
248 | |
249 | /* |
250 | * Search from current position until we find a contiguous |
251 | * bunch of npages+2 unused pages. |
252 | */ |
253 | pos = minefield_curpos; |
254 | lim = minefield_npages; |
255 | while (1) { |
256 | /* Skip over used pages. */ |
257 | while (pos < lim && minefield_admin[pos] != 0xFFFF) |
258 | pos++; |
259 | /* Count unused pages. */ |
260 | start = pos; |
261 | while (pos < lim && pos - start < npages + 2 && |
262 | minefield_admin[pos] == 0xFFFF) |
263 | pos++; |
264 | if (pos - start == npages + 2) |
265 | break; |
266 | /* If we've reached the limit, reset the limit or stop. */ |
267 | if (pos >= lim) { |
268 | if (lim == minefield_npages) { |
269 | /* go round and start again at zero */ |
270 | lim = minefield_curpos; |
271 | pos = 0; |
272 | } else { |
273 | minefield_admin_hide(1); |
274 | return NULL; |
275 | } |
276 | } |
277 | } |
278 | |
279 | minefield_curpos = pos - 1; |
280 | |
281 | /* |
282 | * We have npages+2 unused pages starting at start. We leave |
283 | * the first and last of these alone and use the rest. |
284 | */ |
285 | region_end = (start + npages + 1) * PAGESIZE; |
286 | region_start = region_end - size; |
287 | /* FIXME: could align here if we wanted */ |
288 | |
289 | /* |
290 | * Update the admin region. |
291 | */ |
292 | for (i = start + 2; i < start + npages + 1; i++) |
293 | minefield_admin[i] = 0xFFFE; /* used but no region starts here */ |
294 | minefield_admin[start + 1] = region_start % PAGESIZE; |
295 | |
296 | minefield_admin_hide(1); |
297 | |
298 | VirtualAlloc((char *) minefield_pages + region_start, size, |
299 | MEM_COMMIT, PAGE_READWRITE); |
300 | return (char *) minefield_pages + region_start; |
301 | } |
302 | |
303 | static void minefield_free(void *ptr) |
304 | { |
305 | int region_start, i, j; |
306 | |
307 | minefield_admin_hide(0); |
308 | |
309 | region_start = (char *) ptr - (char *) minefield_pages; |
310 | i = region_start / PAGESIZE; |
311 | if (i < 0 || i >= minefield_npages || |
312 | minefield_admin[i] != region_start % PAGESIZE) |
313 | minefield_bomb(); |
314 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) { |
315 | minefield_admin[j] = 0xFFFF; |
316 | } |
317 | |
318 | VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT); |
319 | |
320 | minefield_admin_hide(1); |
321 | } |
322 | |
323 | static int minefield_get_size(void *ptr) |
324 | { |
325 | int region_start, i, j; |
326 | |
327 | minefield_admin_hide(0); |
328 | |
329 | region_start = (char *) ptr - (char *) minefield_pages; |
330 | i = region_start / PAGESIZE; |
331 | if (i < 0 || i >= minefield_npages || |
332 | minefield_admin[i] != region_start % PAGESIZE) |
333 | minefield_bomb(); |
334 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++); |
335 | |
336 | minefield_admin_hide(1); |
337 | |
338 | return j * PAGESIZE - region_start; |
339 | } |
340 | |
341 | void *minefield_c_malloc(size_t size) |
342 | { |
343 | if (!minefield_initialised) |
344 | minefield_init(); |
345 | return minefield_alloc(size); |
346 | } |
347 | |
348 | void minefield_c_free(void *p) |
349 | { |
350 | if (!minefield_initialised) |
351 | minefield_init(); |
352 | minefield_free(p); |
353 | } |
354 | |
355 | /* |
356 | * realloc _always_ moves the chunk, for rapid detection of code |
357 | * that assumes it won't. |
358 | */ |
359 | void *minefield_c_realloc(void *p, size_t size) |
360 | { |
361 | size_t oldsize; |
362 | void *q; |
363 | if (!minefield_initialised) |
364 | minefield_init(); |
365 | q = minefield_alloc(size); |
366 | oldsize = minefield_get_size(p); |
367 | memcpy(q, p, (oldsize < size ? oldsize : size)); |
368 | minefield_free(p); |
369 | return q; |
370 | } |
371 | |
372 | #endif /* MINEFIELD */ |