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1 | /* |
2 | * winmisc.c: miscellaneous Windows-specific things. |
3 | */ |
4 | |
5 | #include <windows.h> |
6 | #include <stdio.h> |
7 | #include <stdlib.h> |
8 | #include "putty.h" |
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9 | #include "winstuff.h" |
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10 | |
4c48c989 |
11 | OSVERSIONINFO osVersion; |
12 | |
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13 | void platform_get_x11_auth(char *display, int *proto, |
14 | unsigned char *data, int *datalen) |
15 | { |
16 | /* We don't support this at all under Windows. */ |
17 | } |
9a30e26b |
18 | |
9fab77dc |
19 | Filename filename_from_str(const char *str) |
9a30e26b |
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 | |
9fab77dc |
27 | const char *filename_to_str(const Filename *fn) |
9a30e26b |
28 | { |
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29 | return fn->path; |
9a30e26b |
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 | int SaneDialogBox(HINSTANCE hinst, |
43 | LPCTSTR tmpl, |
44 | HWND hwndparent, |
45 | DLGPROC lpDialogFunc) |
46 | { |
2979718a |
47 | WNDCLASS wc; |
48 | HWND hwnd; |
8ee3ff16 |
49 | MSG msg; |
2979718a |
50 | int flags; |
51 | int ret; |
5e9e124a |
52 | int gm; |
2979718a |
53 | |
54 | wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW; |
55 | wc.lpfnWndProc = DefDlgProc; |
56 | wc.cbClsExtra = 0; |
57 | wc.cbWndExtra = DLGWINDOWEXTRA + 8; |
58 | wc.hInstance = hinst; |
59 | wc.hIcon = NULL; |
60 | wc.hCursor = LoadCursor(NULL, IDC_ARROW); |
61 | wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1); |
62 | wc.lpszMenuName = NULL; |
63 | wc.lpszClassName = "PuTTYConfigBox"; |
64 | RegisterClass(&wc); |
65 | |
66 | hwnd = CreateDialog(hinst, tmpl, hwndparent, lpDialogFunc); |
67 | |
68 | SetWindowLong(hwnd, BOXFLAGS, 0); /* flags */ |
69 | SetWindowLong(hwnd, BOXRESULT, 0); /* result from SaneEndDialog */ |
70 | |
5e9e124a |
71 | while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) { |
2979718a |
72 | flags=GetWindowLong(hwnd, BOXFLAGS); |
73 | if (!(flags & DF_END) && !IsDialogMessage(hwnd, &msg)) |
8ee3ff16 |
74 | DispatchMessage(&msg); |
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75 | if (flags & DF_END) |
76 | break; |
8ee3ff16 |
77 | } |
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78 | |
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79 | if (gm == 0) |
80 | PostQuitMessage(msg.wParam); /* We got a WM_QUIT, pass it on */ |
81 | |
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82 | ret=GetWindowLong(hwnd, BOXRESULT); |
83 | DestroyWindow(hwnd); |
84 | return ret; |
8ee3ff16 |
85 | } |
86 | |
87 | void SaneEndDialog(HWND hwnd, int ret) |
88 | { |
2979718a |
89 | SetWindowLong(hwnd, BOXRESULT, ret); |
90 | SetWindowLong(hwnd, BOXFLAGS, DF_END); |
8ee3ff16 |
91 | } |
92 | |
4c48c989 |
93 | BOOL init_winver(void) |
94 | { |
95 | ZeroMemory(&osVersion, sizeof(osVersion)); |
96 | osVersion.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); |
97 | return GetVersionEx ( (OSVERSIONINFO *) &osVersion); |
98 | } |
99 | |
d0912d1f |
100 | #ifdef DEBUG |
101 | static FILE *debug_fp = NULL; |
102 | static HANDLE debug_hdl = INVALID_HANDLE_VALUE; |
103 | static int debug_got_console = 0; |
104 | |
105 | void dputs(char *buf) |
106 | { |
107 | DWORD dw; |
108 | |
109 | if (!debug_got_console) { |
110 | if (AllocConsole()) { |
111 | debug_got_console = 1; |
112 | debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE); |
113 | } |
114 | } |
115 | if (!debug_fp) { |
116 | debug_fp = fopen("debug.log", "w"); |
117 | } |
118 | |
119 | if (debug_hdl != INVALID_HANDLE_VALUE) { |
120 | WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL); |
121 | } |
122 | fputs(buf, debug_fp); |
123 | fflush(debug_fp); |
124 | } |
125 | #endif |
126 | |
127 | #ifdef MINEFIELD |
128 | /* |
129 | * Minefield - a Windows equivalent for Electric Fence |
130 | */ |
131 | |
132 | #define PAGESIZE 4096 |
133 | |
134 | /* |
135 | * Design: |
136 | * |
137 | * We start by reserving as much virtual address space as Windows |
138 | * will sensibly (or not sensibly) let us have. We flag it all as |
139 | * invalid memory. |
140 | * |
141 | * Any allocation attempt is satisfied by committing one or more |
142 | * pages, with an uncommitted page on either side. The returned |
143 | * memory region is jammed up against the _end_ of the pages. |
144 | * |
145 | * Freeing anything causes instantaneous decommitment of the pages |
146 | * involved, so stale pointers are caught as soon as possible. |
147 | */ |
148 | |
149 | static int minefield_initialised = 0; |
150 | static void *minefield_region = NULL; |
151 | static long minefield_size = 0; |
152 | static long minefield_npages = 0; |
153 | static long minefield_curpos = 0; |
154 | static unsigned short *minefield_admin = NULL; |
155 | static void *minefield_pages = NULL; |
156 | |
157 | static void minefield_admin_hide(int hide) |
158 | { |
159 | int access = hide ? PAGE_NOACCESS : PAGE_READWRITE; |
160 | VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL); |
161 | } |
162 | |
163 | static void minefield_init(void) |
164 | { |
165 | int size; |
166 | int admin_size; |
167 | int i; |
168 | |
169 | for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) { |
170 | minefield_region = VirtualAlloc(NULL, size, |
171 | MEM_RESERVE, PAGE_NOACCESS); |
172 | if (minefield_region) |
173 | break; |
174 | } |
175 | minefield_size = size; |
176 | |
177 | /* |
178 | * Firstly, allocate a section of that to be the admin block. |
179 | * We'll need a two-byte field for each page. |
180 | */ |
181 | minefield_admin = minefield_region; |
182 | minefield_npages = minefield_size / PAGESIZE; |
183 | admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1); |
184 | minefield_npages = (minefield_size - admin_size) / PAGESIZE; |
185 | minefield_pages = (char *) minefield_region + admin_size; |
186 | |
187 | /* |
188 | * Commit the admin region. |
189 | */ |
190 | VirtualAlloc(minefield_admin, minefield_npages * 2, |
191 | MEM_COMMIT, PAGE_READWRITE); |
192 | |
193 | /* |
194 | * Mark all pages as unused (0xFFFF). |
195 | */ |
196 | for (i = 0; i < minefield_npages; i++) |
197 | minefield_admin[i] = 0xFFFF; |
198 | |
199 | /* |
200 | * Hide the admin region. |
201 | */ |
202 | minefield_admin_hide(1); |
203 | |
204 | minefield_initialised = 1; |
205 | } |
206 | |
207 | static void minefield_bomb(void) |
208 | { |
209 | div(1, *(int *) minefield_pages); |
210 | } |
211 | |
212 | static void *minefield_alloc(int size) |
213 | { |
214 | int npages; |
215 | int pos, lim, region_end, region_start; |
216 | int start; |
217 | int i; |
218 | |
219 | npages = (size + PAGESIZE - 1) / PAGESIZE; |
220 | |
221 | minefield_admin_hide(0); |
222 | |
223 | /* |
224 | * Search from current position until we find a contiguous |
225 | * bunch of npages+2 unused pages. |
226 | */ |
227 | pos = minefield_curpos; |
228 | lim = minefield_npages; |
229 | while (1) { |
230 | /* Skip over used pages. */ |
231 | while (pos < lim && minefield_admin[pos] != 0xFFFF) |
232 | pos++; |
233 | /* Count unused pages. */ |
234 | start = pos; |
235 | while (pos < lim && pos - start < npages + 2 && |
236 | minefield_admin[pos] == 0xFFFF) |
237 | pos++; |
238 | if (pos - start == npages + 2) |
239 | break; |
240 | /* If we've reached the limit, reset the limit or stop. */ |
241 | if (pos >= lim) { |
242 | if (lim == minefield_npages) { |
243 | /* go round and start again at zero */ |
244 | lim = minefield_curpos; |
245 | pos = 0; |
246 | } else { |
247 | minefield_admin_hide(1); |
248 | return NULL; |
249 | } |
250 | } |
251 | } |
252 | |
253 | minefield_curpos = pos - 1; |
254 | |
255 | /* |
256 | * We have npages+2 unused pages starting at start. We leave |
257 | * the first and last of these alone and use the rest. |
258 | */ |
259 | region_end = (start + npages + 1) * PAGESIZE; |
260 | region_start = region_end - size; |
261 | /* FIXME: could align here if we wanted */ |
262 | |
263 | /* |
264 | * Update the admin region. |
265 | */ |
266 | for (i = start + 2; i < start + npages + 1; i++) |
267 | minefield_admin[i] = 0xFFFE; /* used but no region starts here */ |
268 | minefield_admin[start + 1] = region_start % PAGESIZE; |
269 | |
270 | minefield_admin_hide(1); |
271 | |
272 | VirtualAlloc((char *) minefield_pages + region_start, size, |
273 | MEM_COMMIT, PAGE_READWRITE); |
274 | return (char *) minefield_pages + region_start; |
275 | } |
276 | |
277 | static void minefield_free(void *ptr) |
278 | { |
279 | int region_start, i, j; |
280 | |
281 | minefield_admin_hide(0); |
282 | |
283 | region_start = (char *) ptr - (char *) minefield_pages; |
284 | i = region_start / PAGESIZE; |
285 | if (i < 0 || i >= minefield_npages || |
286 | minefield_admin[i] != region_start % PAGESIZE) |
287 | minefield_bomb(); |
288 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) { |
289 | minefield_admin[j] = 0xFFFF; |
290 | } |
291 | |
292 | VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT); |
293 | |
294 | minefield_admin_hide(1); |
295 | } |
296 | |
297 | static int minefield_get_size(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 | |
310 | minefield_admin_hide(1); |
311 | |
312 | return j * PAGESIZE - region_start; |
313 | } |
314 | |
315 | void *minefield_c_malloc(size_t size) |
316 | { |
317 | if (!minefield_initialised) |
318 | minefield_init(); |
319 | return minefield_alloc(size); |
320 | } |
321 | |
322 | void minefield_c_free(void *p) |
323 | { |
324 | if (!minefield_initialised) |
325 | minefield_init(); |
326 | minefield_free(p); |
327 | } |
328 | |
329 | /* |
330 | * realloc _always_ moves the chunk, for rapid detection of code |
331 | * that assumes it won't. |
332 | */ |
333 | void *minefield_c_realloc(void *p, size_t size) |
334 | { |
335 | size_t oldsize; |
336 | void *q; |
337 | if (!minefield_initialised) |
338 | minefield_init(); |
339 | q = minefield_alloc(size); |
340 | oldsize = minefield_get_size(p); |
341 | memcpy(q, p, (oldsize < size ? oldsize : size)); |
342 | minefield_free(p); |
343 | return q; |
344 | } |
345 | |
346 | #endif /* MINEFIELD */ |