e0e7dff8 |
1 | /* |
2 | * winmisc.c: miscellaneous Windows-specific things. |
3 | */ |
4 | |
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5 | #include <stdio.h> |
6 | #include <stdlib.h> |
7 | #include "putty.h" |
8 | |
4c48c989 |
9 | OSVERSIONINFO osVersion; |
10 | |
e0e7dff8 |
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 | } |
9a30e26b |
16 | |
9fab77dc |
17 | Filename filename_from_str(const char *str) |
9a30e26b |
18 | { |
19 | Filename ret; |
20 | strncpy(ret.path, str, sizeof(ret.path)); |
21 | ret.path[sizeof(ret.path)-1] = '\0'; |
22 | return ret; |
23 | } |
24 | |
9fab77dc |
25 | const char *filename_to_str(const Filename *fn) |
9a30e26b |
26 | { |
9fab77dc |
27 | return fn->path; |
9a30e26b |
28 | } |
29 | |
30 | int filename_equal(Filename f1, Filename f2) |
31 | { |
32 | return !strcmp(f1.path, f2.path); |
33 | } |
34 | |
35 | int filename_is_null(Filename fn) |
36 | { |
37 | return !*fn.path; |
38 | } |
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39 | |
799dfcfa |
40 | char *get_username(void) |
41 | { |
42 | DWORD namelen; |
43 | char *user; |
44 | |
45 | namelen = 0; |
46 | if (GetUserName(NULL, &namelen) == FALSE) |
47 | return NULL; |
48 | |
49 | user = snewn(namelen, char); |
50 | GetUserName(user, &namelen); |
51 | |
52 | return user; |
53 | } |
54 | |
8ee3ff16 |
55 | int SaneDialogBox(HINSTANCE hinst, |
56 | LPCTSTR tmpl, |
57 | HWND hwndparent, |
58 | DLGPROC lpDialogFunc) |
59 | { |
2979718a |
60 | WNDCLASS wc; |
61 | HWND hwnd; |
8ee3ff16 |
62 | MSG msg; |
2979718a |
63 | int flags; |
64 | int ret; |
5e9e124a |
65 | int gm; |
2979718a |
66 | |
67 | wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW; |
68 | wc.lpfnWndProc = DefDlgProc; |
69 | wc.cbClsExtra = 0; |
70 | wc.cbWndExtra = DLGWINDOWEXTRA + 8; |
71 | wc.hInstance = hinst; |
72 | wc.hIcon = NULL; |
73 | wc.hCursor = LoadCursor(NULL, IDC_ARROW); |
74 | wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1); |
75 | wc.lpszMenuName = NULL; |
76 | wc.lpszClassName = "PuTTYConfigBox"; |
77 | RegisterClass(&wc); |
78 | |
79 | hwnd = CreateDialog(hinst, tmpl, hwndparent, lpDialogFunc); |
80 | |
81 | SetWindowLong(hwnd, BOXFLAGS, 0); /* flags */ |
82 | SetWindowLong(hwnd, BOXRESULT, 0); /* result from SaneEndDialog */ |
83 | |
5e9e124a |
84 | while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) { |
2979718a |
85 | flags=GetWindowLong(hwnd, BOXFLAGS); |
86 | if (!(flags & DF_END) && !IsDialogMessage(hwnd, &msg)) |
8ee3ff16 |
87 | DispatchMessage(&msg); |
2979718a |
88 | if (flags & DF_END) |
89 | break; |
8ee3ff16 |
90 | } |
2979718a |
91 | |
5e9e124a |
92 | if (gm == 0) |
93 | PostQuitMessage(msg.wParam); /* We got a WM_QUIT, pass it on */ |
94 | |
2979718a |
95 | ret=GetWindowLong(hwnd, BOXRESULT); |
96 | DestroyWindow(hwnd); |
97 | return ret; |
8ee3ff16 |
98 | } |
99 | |
100 | void SaneEndDialog(HWND hwnd, int ret) |
101 | { |
2979718a |
102 | SetWindowLong(hwnd, BOXRESULT, ret); |
103 | SetWindowLong(hwnd, BOXFLAGS, DF_END); |
8ee3ff16 |
104 | } |
105 | |
4c48c989 |
106 | BOOL init_winver(void) |
107 | { |
108 | ZeroMemory(&osVersion, sizeof(osVersion)); |
109 | osVersion.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); |
110 | return GetVersionEx ( (OSVERSIONINFO *) &osVersion); |
111 | } |
112 | |
d0912d1f |
113 | #ifdef DEBUG |
114 | static FILE *debug_fp = NULL; |
115 | static HANDLE debug_hdl = INVALID_HANDLE_VALUE; |
116 | static int debug_got_console = 0; |
117 | |
118 | void dputs(char *buf) |
119 | { |
120 | DWORD dw; |
121 | |
122 | if (!debug_got_console) { |
123 | if (AllocConsole()) { |
124 | debug_got_console = 1; |
125 | debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE); |
126 | } |
127 | } |
128 | if (!debug_fp) { |
129 | debug_fp = fopen("debug.log", "w"); |
130 | } |
131 | |
132 | if (debug_hdl != INVALID_HANDLE_VALUE) { |
133 | WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL); |
134 | } |
135 | fputs(buf, debug_fp); |
136 | fflush(debug_fp); |
137 | } |
138 | #endif |
139 | |
140 | #ifdef MINEFIELD |
141 | /* |
142 | * Minefield - a Windows equivalent for Electric Fence |
143 | */ |
144 | |
145 | #define PAGESIZE 4096 |
146 | |
147 | /* |
148 | * Design: |
149 | * |
150 | * We start by reserving as much virtual address space as Windows |
151 | * will sensibly (or not sensibly) let us have. We flag it all as |
152 | * invalid memory. |
153 | * |
154 | * Any allocation attempt is satisfied by committing one or more |
155 | * pages, with an uncommitted page on either side. The returned |
156 | * memory region is jammed up against the _end_ of the pages. |
157 | * |
158 | * Freeing anything causes instantaneous decommitment of the pages |
159 | * involved, so stale pointers are caught as soon as possible. |
160 | */ |
161 | |
162 | static int minefield_initialised = 0; |
163 | static void *minefield_region = NULL; |
164 | static long minefield_size = 0; |
165 | static long minefield_npages = 0; |
166 | static long minefield_curpos = 0; |
167 | static unsigned short *minefield_admin = NULL; |
168 | static void *minefield_pages = NULL; |
169 | |
170 | static void minefield_admin_hide(int hide) |
171 | { |
172 | int access = hide ? PAGE_NOACCESS : PAGE_READWRITE; |
173 | VirtualProtect(minefield_admin, minefield_npages * 2, access, NULL); |
174 | } |
175 | |
176 | static void minefield_init(void) |
177 | { |
178 | int size; |
179 | int admin_size; |
180 | int i; |
181 | |
182 | for (size = 0x40000000; size > 0; size = ((size >> 3) * 7) & ~0xFFF) { |
183 | minefield_region = VirtualAlloc(NULL, size, |
184 | MEM_RESERVE, PAGE_NOACCESS); |
185 | if (minefield_region) |
186 | break; |
187 | } |
188 | minefield_size = size; |
189 | |
190 | /* |
191 | * Firstly, allocate a section of that to be the admin block. |
192 | * We'll need a two-byte field for each page. |
193 | */ |
194 | minefield_admin = minefield_region; |
195 | minefield_npages = minefield_size / PAGESIZE; |
196 | admin_size = (minefield_npages * 2 + PAGESIZE - 1) & ~(PAGESIZE - 1); |
197 | minefield_npages = (minefield_size - admin_size) / PAGESIZE; |
198 | minefield_pages = (char *) minefield_region + admin_size; |
199 | |
200 | /* |
201 | * Commit the admin region. |
202 | */ |
203 | VirtualAlloc(minefield_admin, minefield_npages * 2, |
204 | MEM_COMMIT, PAGE_READWRITE); |
205 | |
206 | /* |
207 | * Mark all pages as unused (0xFFFF). |
208 | */ |
209 | for (i = 0; i < minefield_npages; i++) |
210 | minefield_admin[i] = 0xFFFF; |
211 | |
212 | /* |
213 | * Hide the admin region. |
214 | */ |
215 | minefield_admin_hide(1); |
216 | |
217 | minefield_initialised = 1; |
218 | } |
219 | |
220 | static void minefield_bomb(void) |
221 | { |
222 | div(1, *(int *) minefield_pages); |
223 | } |
224 | |
225 | static void *minefield_alloc(int size) |
226 | { |
227 | int npages; |
228 | int pos, lim, region_end, region_start; |
229 | int start; |
230 | int i; |
231 | |
232 | npages = (size + PAGESIZE - 1) / PAGESIZE; |
233 | |
234 | minefield_admin_hide(0); |
235 | |
236 | /* |
237 | * Search from current position until we find a contiguous |
238 | * bunch of npages+2 unused pages. |
239 | */ |
240 | pos = minefield_curpos; |
241 | lim = minefield_npages; |
242 | while (1) { |
243 | /* Skip over used pages. */ |
244 | while (pos < lim && minefield_admin[pos] != 0xFFFF) |
245 | pos++; |
246 | /* Count unused pages. */ |
247 | start = pos; |
248 | while (pos < lim && pos - start < npages + 2 && |
249 | minefield_admin[pos] == 0xFFFF) |
250 | pos++; |
251 | if (pos - start == npages + 2) |
252 | break; |
253 | /* If we've reached the limit, reset the limit or stop. */ |
254 | if (pos >= lim) { |
255 | if (lim == minefield_npages) { |
256 | /* go round and start again at zero */ |
257 | lim = minefield_curpos; |
258 | pos = 0; |
259 | } else { |
260 | minefield_admin_hide(1); |
261 | return NULL; |
262 | } |
263 | } |
264 | } |
265 | |
266 | minefield_curpos = pos - 1; |
267 | |
268 | /* |
269 | * We have npages+2 unused pages starting at start. We leave |
270 | * the first and last of these alone and use the rest. |
271 | */ |
272 | region_end = (start + npages + 1) * PAGESIZE; |
273 | region_start = region_end - size; |
274 | /* FIXME: could align here if we wanted */ |
275 | |
276 | /* |
277 | * Update the admin region. |
278 | */ |
279 | for (i = start + 2; i < start + npages + 1; i++) |
280 | minefield_admin[i] = 0xFFFE; /* used but no region starts here */ |
281 | minefield_admin[start + 1] = region_start % PAGESIZE; |
282 | |
283 | minefield_admin_hide(1); |
284 | |
285 | VirtualAlloc((char *) minefield_pages + region_start, size, |
286 | MEM_COMMIT, PAGE_READWRITE); |
287 | return (char *) minefield_pages + region_start; |
288 | } |
289 | |
290 | static void minefield_free(void *ptr) |
291 | { |
292 | int region_start, i, j; |
293 | |
294 | minefield_admin_hide(0); |
295 | |
296 | region_start = (char *) ptr - (char *) minefield_pages; |
297 | i = region_start / PAGESIZE; |
298 | if (i < 0 || i >= minefield_npages || |
299 | minefield_admin[i] != region_start % PAGESIZE) |
300 | minefield_bomb(); |
301 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++) { |
302 | minefield_admin[j] = 0xFFFF; |
303 | } |
304 | |
305 | VirtualFree(ptr, j * PAGESIZE - region_start, MEM_DECOMMIT); |
306 | |
307 | minefield_admin_hide(1); |
308 | } |
309 | |
310 | static int minefield_get_size(void *ptr) |
311 | { |
312 | int region_start, i, j; |
313 | |
314 | minefield_admin_hide(0); |
315 | |
316 | region_start = (char *) ptr - (char *) minefield_pages; |
317 | i = region_start / PAGESIZE; |
318 | if (i < 0 || i >= minefield_npages || |
319 | minefield_admin[i] != region_start % PAGESIZE) |
320 | minefield_bomb(); |
321 | for (j = i; j < minefield_npages && minefield_admin[j] != 0xFFFF; j++); |
322 | |
323 | minefield_admin_hide(1); |
324 | |
325 | return j * PAGESIZE - region_start; |
326 | } |
327 | |
328 | void *minefield_c_malloc(size_t size) |
329 | { |
330 | if (!minefield_initialised) |
331 | minefield_init(); |
332 | return minefield_alloc(size); |
333 | } |
334 | |
335 | void minefield_c_free(void *p) |
336 | { |
337 | if (!minefield_initialised) |
338 | minefield_init(); |
339 | minefield_free(p); |
340 | } |
341 | |
342 | /* |
343 | * realloc _always_ moves the chunk, for rapid detection of code |
344 | * that assumes it won't. |
345 | */ |
346 | void *minefield_c_realloc(void *p, size_t size) |
347 | { |
348 | size_t oldsize; |
349 | void *q; |
350 | if (!minefield_initialised) |
351 | minefield_init(); |
352 | q = minefield_alloc(size); |
353 | oldsize = minefield_get_size(p); |
354 | memcpy(q, p, (oldsize < size ? oldsize : size)); |
355 | minefield_free(p); |
356 | return q; |
357 | } |
358 | |
359 | #endif /* MINEFIELD */ |