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7fb843f8 FB |
1 | /* |
2 | * TAP-Win32 -- A kernel driver to provide virtual tap device functionality | |
3 | * on Windows. Originally derived from the CIPE-Win32 | |
4 | * project by Damion K. Wilson, with extensive modifications by | |
5 | * James Yonan. | |
6 | * | |
7 | * All source code which derives from the CIPE-Win32 project is | |
8 | * Copyright (C) Damion K. Wilson, 2003, and is released under the | |
9 | * GPL version 2 (see below). | |
10 | * | |
11 | * All other source code is Copyright (C) James Yonan, 2003-2004, | |
12 | * and is released under the GPL version 2 (see below). | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program (see the file COPYING included with this | |
8167ee88 | 26 | * distribution); if not, see <http://www.gnu.org/licenses/>. |
7fb843f8 | 27 | */ |
a8ed73f7 MM |
28 | |
29 | #include "net/tap.h" | |
30 | ||
87ecb68b PB |
31 | #include "qemu-common.h" |
32 | #include "net.h" | |
33 | #include "sysemu.h" | |
7fb843f8 FB |
34 | #include <stdio.h> |
35 | #include <windows.h> | |
f8bfb1dc | 36 | #include <winioctl.h> |
7fb843f8 FB |
37 | |
38 | //============= | |
39 | // TAP IOCTLs | |
40 | //============= | |
41 | ||
42 | #define TAP_CONTROL_CODE(request,method) \ | |
43 | CTL_CODE (FILE_DEVICE_UNKNOWN, request, method, FILE_ANY_ACCESS) | |
44 | ||
45 | #define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE (1, METHOD_BUFFERED) | |
46 | #define TAP_IOCTL_GET_VERSION TAP_CONTROL_CODE (2, METHOD_BUFFERED) | |
47 | #define TAP_IOCTL_GET_MTU TAP_CONTROL_CODE (3, METHOD_BUFFERED) | |
48 | #define TAP_IOCTL_GET_INFO TAP_CONTROL_CODE (4, METHOD_BUFFERED) | |
49 | #define TAP_IOCTL_CONFIG_POINT_TO_POINT TAP_CONTROL_CODE (5, METHOD_BUFFERED) | |
50 | #define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE (6, METHOD_BUFFERED) | |
51 | #define TAP_IOCTL_CONFIG_DHCP_MASQ TAP_CONTROL_CODE (7, METHOD_BUFFERED) | |
52 | #define TAP_IOCTL_GET_LOG_LINE TAP_CONTROL_CODE (8, METHOD_BUFFERED) | |
53 | #define TAP_IOCTL_CONFIG_DHCP_SET_OPT TAP_CONTROL_CODE (9, METHOD_BUFFERED) | |
54 | ||
55 | //================= | |
56 | // Registry keys | |
57 | //================= | |
58 | ||
59 | #define ADAPTER_KEY "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}" | |
60 | ||
61 | #define NETWORK_CONNECTIONS_KEY "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}" | |
62 | ||
63 | //====================== | |
64 | // Filesystem prefixes | |
65 | //====================== | |
66 | ||
67 | #define USERMODEDEVICEDIR "\\\\.\\Global\\" | |
68 | #define TAPSUFFIX ".tap" | |
69 | ||
70 | ||
71 | //====================== | |
72 | // Compile time configuration | |
73 | //====================== | |
74 | ||
978d5d73 | 75 | //#define DEBUG_TAP_WIN32 |
7fb843f8 FB |
76 | |
77 | #define TUN_ASYNCHRONOUS_WRITES 1 | |
78 | ||
79 | #define TUN_BUFFER_SIZE 1560 | |
80 | #define TUN_MAX_BUFFER_COUNT 32 | |
81 | ||
82 | /* | |
83 | * The data member "buffer" must be the first element in the tun_buffer | |
84 | * structure. See the function, tap_win32_free_buffer. | |
85 | */ | |
86 | typedef struct tun_buffer_s { | |
87 | unsigned char buffer [TUN_BUFFER_SIZE]; | |
88 | unsigned long read_size; | |
89 | struct tun_buffer_s* next; | |
c227f099 | 90 | } tun_buffer_t; |
7fb843f8 FB |
91 | |
92 | typedef struct tap_win32_overlapped { | |
93 | HANDLE handle; | |
94 | HANDLE read_event; | |
95 | HANDLE write_event; | |
96 | HANDLE output_queue_semaphore; | |
97 | HANDLE free_list_semaphore; | |
e6cda8e2 | 98 | HANDLE tap_semaphore; |
7fb843f8 FB |
99 | CRITICAL_SECTION output_queue_cs; |
100 | CRITICAL_SECTION free_list_cs; | |
101 | OVERLAPPED read_overlapped; | |
102 | OVERLAPPED write_overlapped; | |
c227f099 AL |
103 | tun_buffer_t buffers[TUN_MAX_BUFFER_COUNT]; |
104 | tun_buffer_t* free_list; | |
105 | tun_buffer_t* output_queue_front; | |
106 | tun_buffer_t* output_queue_back; | |
107 | } tap_win32_overlapped_t; | |
7fb843f8 | 108 | |
c227f099 | 109 | static tap_win32_overlapped_t tap_overlapped; |
7fb843f8 | 110 | |
c227f099 | 111 | static tun_buffer_t* get_buffer_from_free_list(tap_win32_overlapped_t* const overlapped) |
7fb843f8 | 112 | { |
c227f099 | 113 | tun_buffer_t* buffer = NULL; |
7fb843f8 FB |
114 | WaitForSingleObject(overlapped->free_list_semaphore, INFINITE); |
115 | EnterCriticalSection(&overlapped->free_list_cs); | |
116 | buffer = overlapped->free_list; | |
117 | // assert(buffer != NULL); | |
118 | overlapped->free_list = buffer->next; | |
119 | LeaveCriticalSection(&overlapped->free_list_cs); | |
120 | buffer->next = NULL; | |
121 | return buffer; | |
122 | } | |
123 | ||
c227f099 | 124 | static void put_buffer_on_free_list(tap_win32_overlapped_t* const overlapped, tun_buffer_t* const buffer) |
7fb843f8 FB |
125 | { |
126 | EnterCriticalSection(&overlapped->free_list_cs); | |
127 | buffer->next = overlapped->free_list; | |
128 | overlapped->free_list = buffer; | |
129 | LeaveCriticalSection(&overlapped->free_list_cs); | |
130 | ReleaseSemaphore(overlapped->free_list_semaphore, 1, NULL); | |
131 | } | |
132 | ||
c227f099 | 133 | static tun_buffer_t* get_buffer_from_output_queue(tap_win32_overlapped_t* const overlapped, const int block) |
7fb843f8 | 134 | { |
c227f099 | 135 | tun_buffer_t* buffer = NULL; |
7fb843f8 FB |
136 | DWORD result, timeout = block ? INFINITE : 0L; |
137 | ||
138 | // Non-blocking call | |
5fafdf24 | 139 | result = WaitForSingleObject(overlapped->output_queue_semaphore, timeout); |
7fb843f8 | 140 | |
5fafdf24 TS |
141 | switch (result) |
142 | { | |
7fb843f8 | 143 | // The semaphore object was signaled. |
5fafdf24 | 144 | case WAIT_OBJECT_0: |
7fb843f8 FB |
145 | EnterCriticalSection(&overlapped->output_queue_cs); |
146 | ||
147 | buffer = overlapped->output_queue_front; | |
148 | overlapped->output_queue_front = buffer->next; | |
149 | ||
150 | if(overlapped->output_queue_front == NULL) { | |
151 | overlapped->output_queue_back = NULL; | |
152 | } | |
153 | ||
154 | LeaveCriticalSection(&overlapped->output_queue_cs); | |
5fafdf24 | 155 | break; |
7fb843f8 FB |
156 | |
157 | // Semaphore was nonsignaled, so a time-out occurred. | |
5fafdf24 | 158 | case WAIT_TIMEOUT: |
7fb843f8 | 159 | // Cannot open another window. |
5fafdf24 | 160 | break; |
7fb843f8 FB |
161 | } |
162 | ||
163 | return buffer; | |
164 | } | |
165 | ||
c227f099 | 166 | static tun_buffer_t* get_buffer_from_output_queue_immediate (tap_win32_overlapped_t* const overlapped) |
7fb843f8 FB |
167 | { |
168 | return get_buffer_from_output_queue(overlapped, 0); | |
169 | } | |
170 | ||
c227f099 | 171 | static void put_buffer_on_output_queue(tap_win32_overlapped_t* const overlapped, tun_buffer_t* const buffer) |
7fb843f8 FB |
172 | { |
173 | EnterCriticalSection(&overlapped->output_queue_cs); | |
174 | ||
175 | if(overlapped->output_queue_front == NULL && overlapped->output_queue_back == NULL) { | |
176 | overlapped->output_queue_front = overlapped->output_queue_back = buffer; | |
177 | } else { | |
178 | buffer->next = NULL; | |
179 | overlapped->output_queue_back->next = buffer; | |
180 | overlapped->output_queue_back = buffer; | |
181 | } | |
182 | ||
183 | LeaveCriticalSection(&overlapped->output_queue_cs); | |
184 | ||
185 | ReleaseSemaphore(overlapped->output_queue_semaphore, 1, NULL); | |
186 | } | |
187 | ||
188 | ||
189 | static int is_tap_win32_dev(const char *guid) | |
190 | { | |
191 | HKEY netcard_key; | |
192 | LONG status; | |
193 | DWORD len; | |
194 | int i = 0; | |
195 | ||
196 | status = RegOpenKeyEx( | |
197 | HKEY_LOCAL_MACHINE, | |
198 | ADAPTER_KEY, | |
199 | 0, | |
200 | KEY_READ, | |
201 | &netcard_key); | |
202 | ||
203 | if (status != ERROR_SUCCESS) { | |
204 | return FALSE; | |
205 | } | |
206 | ||
207 | for (;;) { | |
208 | char enum_name[256]; | |
209 | char unit_string[256]; | |
210 | HKEY unit_key; | |
211 | char component_id_string[] = "ComponentId"; | |
212 | char component_id[256]; | |
213 | char net_cfg_instance_id_string[] = "NetCfgInstanceId"; | |
214 | char net_cfg_instance_id[256]; | |
215 | DWORD data_type; | |
216 | ||
217 | len = sizeof (enum_name); | |
218 | status = RegEnumKeyEx( | |
219 | netcard_key, | |
220 | i, | |
221 | enum_name, | |
222 | &len, | |
223 | NULL, | |
224 | NULL, | |
225 | NULL, | |
226 | NULL); | |
227 | ||
228 | if (status == ERROR_NO_MORE_ITEMS) | |
229 | break; | |
230 | else if (status != ERROR_SUCCESS) { | |
231 | return FALSE; | |
232 | } | |
233 | ||
234 | snprintf (unit_string, sizeof(unit_string), "%s\\%s", | |
235 | ADAPTER_KEY, enum_name); | |
236 | ||
237 | status = RegOpenKeyEx( | |
238 | HKEY_LOCAL_MACHINE, | |
239 | unit_string, | |
240 | 0, | |
241 | KEY_READ, | |
242 | &unit_key); | |
243 | ||
244 | if (status != ERROR_SUCCESS) { | |
245 | return FALSE; | |
246 | } else { | |
247 | len = sizeof (component_id); | |
248 | status = RegQueryValueEx( | |
249 | unit_key, | |
250 | component_id_string, | |
251 | NULL, | |
252 | &data_type, | |
b9e82a59 | 253 | (LPBYTE)component_id, |
7fb843f8 FB |
254 | &len); |
255 | ||
256 | if (!(status != ERROR_SUCCESS || data_type != REG_SZ)) { | |
257 | len = sizeof (net_cfg_instance_id); | |
258 | status = RegQueryValueEx( | |
259 | unit_key, | |
260 | net_cfg_instance_id_string, | |
261 | NULL, | |
262 | &data_type, | |
b9e82a59 | 263 | (LPBYTE)net_cfg_instance_id, |
7fb843f8 FB |
264 | &len); |
265 | ||
266 | if (status == ERROR_SUCCESS && data_type == REG_SZ) { | |
267 | if (/* !strcmp (component_id, TAP_COMPONENT_ID) &&*/ | |
268 | !strcmp (net_cfg_instance_id, guid)) { | |
269 | RegCloseKey (unit_key); | |
270 | RegCloseKey (netcard_key); | |
271 | return TRUE; | |
272 | } | |
273 | } | |
274 | } | |
275 | RegCloseKey (unit_key); | |
276 | } | |
277 | ++i; | |
278 | } | |
279 | ||
280 | RegCloseKey (netcard_key); | |
281 | return FALSE; | |
282 | } | |
283 | ||
284 | static int get_device_guid( | |
285 | char *name, | |
286 | int name_size, | |
287 | char *actual_name, | |
288 | int actual_name_size) | |
289 | { | |
290 | LONG status; | |
291 | HKEY control_net_key; | |
292 | DWORD len; | |
293 | int i = 0; | |
294 | int stop = 0; | |
295 | ||
296 | status = RegOpenKeyEx( | |
297 | HKEY_LOCAL_MACHINE, | |
298 | NETWORK_CONNECTIONS_KEY, | |
299 | 0, | |
300 | KEY_READ, | |
301 | &control_net_key); | |
302 | ||
303 | if (status != ERROR_SUCCESS) { | |
304 | return -1; | |
305 | } | |
306 | ||
307 | while (!stop) | |
308 | { | |
309 | char enum_name[256]; | |
310 | char connection_string[256]; | |
311 | HKEY connection_key; | |
312 | char name_data[256]; | |
313 | DWORD name_type; | |
314 | const char name_string[] = "Name"; | |
315 | ||
316 | len = sizeof (enum_name); | |
317 | status = RegEnumKeyEx( | |
318 | control_net_key, | |
319 | i, | |
320 | enum_name, | |
321 | &len, | |
322 | NULL, | |
323 | NULL, | |
324 | NULL, | |
325 | NULL); | |
326 | ||
327 | if (status == ERROR_NO_MORE_ITEMS) | |
328 | break; | |
329 | else if (status != ERROR_SUCCESS) { | |
330 | return -1; | |
331 | } | |
332 | ||
5fafdf24 | 333 | snprintf(connection_string, |
7fb843f8 FB |
334 | sizeof(connection_string), |
335 | "%s\\%s\\Connection", | |
336 | NETWORK_CONNECTIONS_KEY, enum_name); | |
337 | ||
338 | status = RegOpenKeyEx( | |
339 | HKEY_LOCAL_MACHINE, | |
340 | connection_string, | |
341 | 0, | |
342 | KEY_READ, | |
343 | &connection_key); | |
3b46e624 | 344 | |
7fb843f8 FB |
345 | if (status == ERROR_SUCCESS) { |
346 | len = sizeof (name_data); | |
347 | status = RegQueryValueEx( | |
348 | connection_key, | |
349 | name_string, | |
350 | NULL, | |
351 | &name_type, | |
b9e82a59 | 352 | (LPBYTE)name_data, |
7fb843f8 FB |
353 | &len); |
354 | ||
355 | if (status != ERROR_SUCCESS || name_type != REG_SZ) { | |
356 | return -1; | |
357 | } | |
358 | else { | |
359 | if (is_tap_win32_dev(enum_name)) { | |
360 | snprintf(name, name_size, "%s", enum_name); | |
361 | if (actual_name) { | |
362 | if (strcmp(actual_name, "") != 0) { | |
363 | if (strcmp(name_data, actual_name) != 0) { | |
364 | RegCloseKey (connection_key); | |
365 | ++i; | |
366 | continue; | |
367 | } | |
368 | } | |
369 | else { | |
370 | snprintf(actual_name, actual_name_size, "%s", name_data); | |
371 | } | |
372 | } | |
373 | stop = 1; | |
374 | } | |
375 | } | |
376 | ||
377 | RegCloseKey (connection_key); | |
378 | } | |
379 | ++i; | |
380 | } | |
381 | ||
382 | RegCloseKey (control_net_key); | |
383 | ||
384 | if (stop == 0) | |
385 | return -1; | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | static int tap_win32_set_status(HANDLE handle, int status) | |
391 | { | |
392 | unsigned long len = 0; | |
393 | ||
394 | return DeviceIoControl(handle, TAP_IOCTL_SET_MEDIA_STATUS, | |
395 | &status, sizeof (status), | |
396 | &status, sizeof (status), &len, NULL); | |
397 | } | |
398 | ||
c227f099 | 399 | static void tap_win32_overlapped_init(tap_win32_overlapped_t* const overlapped, const HANDLE handle) |
7fb843f8 FB |
400 | { |
401 | overlapped->handle = handle; | |
402 | ||
403 | overlapped->read_event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
404 | overlapped->write_event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
405 | ||
406 | overlapped->read_overlapped.Offset = 0; | |
407 | overlapped->read_overlapped.OffsetHigh = 0; | |
408 | overlapped->read_overlapped.hEvent = overlapped->read_event; | |
409 | ||
410 | overlapped->write_overlapped.Offset = 0; | |
411 | overlapped->write_overlapped.OffsetHigh = 0; | |
412 | overlapped->write_overlapped.hEvent = overlapped->write_event; | |
413 | ||
414 | InitializeCriticalSection(&overlapped->output_queue_cs); | |
415 | InitializeCriticalSection(&overlapped->free_list_cs); | |
416 | ||
5fafdf24 | 417 | overlapped->output_queue_semaphore = CreateSemaphore( |
7fb843f8 FB |
418 | NULL, // default security attributes |
419 | 0, // initial count | |
420 | TUN_MAX_BUFFER_COUNT, // maximum count | |
421 | NULL); // unnamed semaphore | |
422 | ||
423 | if(!overlapped->output_queue_semaphore) { | |
424 | fprintf(stderr, "error creating output queue semaphore!\n"); | |
425 | } | |
426 | ||
5fafdf24 | 427 | overlapped->free_list_semaphore = CreateSemaphore( |
7fb843f8 FB |
428 | NULL, // default security attributes |
429 | TUN_MAX_BUFFER_COUNT, // initial count | |
430 | TUN_MAX_BUFFER_COUNT, // maximum count | |
431 | NULL); // unnamed semaphore | |
432 | ||
433 | if(!overlapped->free_list_semaphore) { | |
434 | fprintf(stderr, "error creating free list semaphore!\n"); | |
435 | } | |
436 | ||
437 | overlapped->free_list = overlapped->output_queue_front = overlapped->output_queue_back = NULL; | |
438 | ||
439 | { | |
440 | unsigned index; | |
441 | for(index = 0; index < TUN_MAX_BUFFER_COUNT; index++) { | |
c227f099 | 442 | tun_buffer_t* element = &overlapped->buffers[index]; |
7fb843f8 FB |
443 | element->next = overlapped->free_list; |
444 | overlapped->free_list = element; | |
445 | } | |
446 | } | |
e6cda8e2 FB |
447 | /* To count buffers, initially no-signal. */ |
448 | overlapped->tap_semaphore = CreateSemaphore(NULL, 0, TUN_MAX_BUFFER_COUNT, NULL); | |
449 | if(!overlapped->tap_semaphore) | |
450 | fprintf(stderr, "error creating tap_semaphore.\n"); | |
7fb843f8 FB |
451 | } |
452 | ||
c227f099 | 453 | static int tap_win32_write(tap_win32_overlapped_t *overlapped, |
7fb843f8 FB |
454 | const void *buffer, unsigned long size) |
455 | { | |
456 | unsigned long write_size; | |
457 | BOOL result; | |
458 | DWORD error; | |
459 | ||
460 | result = GetOverlappedResult( overlapped->handle, &overlapped->write_overlapped, | |
461 | &write_size, FALSE); | |
462 | ||
463 | if (!result && GetLastError() == ERROR_IO_INCOMPLETE) | |
464 | WaitForSingleObject(overlapped->write_event, INFINITE); | |
465 | ||
466 | result = WriteFile(overlapped->handle, buffer, size, | |
467 | &write_size, &overlapped->write_overlapped); | |
3b46e624 | 468 | |
5fafdf24 | 469 | if (!result) { |
7fb843f8 | 470 | switch (error = GetLastError()) |
5fafdf24 TS |
471 | { |
472 | case ERROR_IO_PENDING: | |
7fb843f8 FB |
473 | #ifndef TUN_ASYNCHRONOUS_WRITES |
474 | WaitForSingleObject(overlapped->write_event, INFINITE); | |
475 | #endif | |
476 | break; | |
477 | default: | |
478 | return -1; | |
5fafdf24 | 479 | } |
7fb843f8 FB |
480 | } |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | static DWORD WINAPI tap_win32_thread_entry(LPVOID param) | |
486 | { | |
c227f099 | 487 | tap_win32_overlapped_t *overlapped = (tap_win32_overlapped_t*)param; |
7fb843f8 FB |
488 | unsigned long read_size; |
489 | BOOL result; | |
490 | DWORD dwError; | |
c227f099 | 491 | tun_buffer_t* buffer = get_buffer_from_free_list(overlapped); |
7fb843f8 FB |
492 | |
493 | ||
494 | for (;;) { | |
495 | result = ReadFile(overlapped->handle, | |
496 | buffer->buffer, | |
497 | sizeof(buffer->buffer), | |
498 | &read_size, | |
499 | &overlapped->read_overlapped); | |
500 | if (!result) { | |
501 | dwError = GetLastError(); | |
502 | if (dwError == ERROR_IO_PENDING) { | |
503 | WaitForSingleObject(overlapped->read_event, INFINITE); | |
504 | result = GetOverlappedResult( overlapped->handle, &overlapped->read_overlapped, | |
505 | &read_size, FALSE); | |
506 | if (!result) { | |
978d5d73 | 507 | #ifdef DEBUG_TAP_WIN32 |
7fb843f8 FB |
508 | LPVOID lpBuffer; |
509 | dwError = GetLastError(); | |
510 | FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, | |
511 | NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
512 | (LPTSTR) & lpBuffer, 0, NULL ); | |
513 | fprintf(stderr, "Tap-Win32: Error GetOverlappedResult %d - %s\n", dwError, lpBuffer); | |
514 | LocalFree( lpBuffer ); | |
515 | #endif | |
516 | } | |
517 | } else { | |
978d5d73 | 518 | #ifdef DEBUG_TAP_WIN32 |
7fb843f8 FB |
519 | LPVOID lpBuffer; |
520 | FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, | |
521 | NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
522 | (LPTSTR) & lpBuffer, 0, NULL ); | |
523 | fprintf(stderr, "Tap-Win32: Error ReadFile %d - %s\n", dwError, lpBuffer); | |
524 | LocalFree( lpBuffer ); | |
525 | #endif | |
526 | } | |
527 | } | |
528 | ||
529 | if(read_size > 0) { | |
530 | buffer->read_size = read_size; | |
531 | put_buffer_on_output_queue(overlapped, buffer); | |
e6cda8e2 | 532 | ReleaseSemaphore(overlapped->tap_semaphore, 1, NULL); |
7fb843f8 FB |
533 | buffer = get_buffer_from_free_list(overlapped); |
534 | } | |
535 | } | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
c227f099 | 540 | static int tap_win32_read(tap_win32_overlapped_t *overlapped, |
7fb843f8 FB |
541 | uint8_t **pbuf, int max_size) |
542 | { | |
543 | int size = 0; | |
544 | ||
c227f099 | 545 | tun_buffer_t* buffer = get_buffer_from_output_queue_immediate(overlapped); |
7fb843f8 FB |
546 | |
547 | if(buffer != NULL) { | |
548 | *pbuf = buffer->buffer; | |
549 | size = (int)buffer->read_size; | |
550 | if(size > max_size) { | |
551 | size = max_size; | |
552 | } | |
553 | } | |
554 | ||
555 | return size; | |
556 | } | |
557 | ||
c227f099 | 558 | static void tap_win32_free_buffer(tap_win32_overlapped_t *overlapped, |
b9e82a59 | 559 | uint8_t *pbuf) |
7fb843f8 | 560 | { |
c227f099 | 561 | tun_buffer_t* buffer = (tun_buffer_t*)pbuf; |
7fb843f8 FB |
562 | put_buffer_on_free_list(overlapped, buffer); |
563 | } | |
564 | ||
c227f099 | 565 | static int tap_win32_open(tap_win32_overlapped_t **phandle, |
7fb843f8 FB |
566 | const char *prefered_name) |
567 | { | |
568 | char device_path[256]; | |
569 | char device_guid[0x100]; | |
570 | int rc; | |
571 | HANDLE handle; | |
572 | BOOL bret; | |
573 | char name_buffer[0x100] = {0, }; | |
574 | struct { | |
575 | unsigned long major; | |
576 | unsigned long minor; | |
577 | unsigned long debug; | |
578 | } version; | |
b9e82a59 | 579 | DWORD version_len; |
7fb843f8 FB |
580 | DWORD idThread; |
581 | HANDLE hThread; | |
582 | ||
583 | if (prefered_name != NULL) | |
584 | snprintf(name_buffer, sizeof(name_buffer), "%s", prefered_name); | |
585 | ||
586 | rc = get_device_guid(device_guid, sizeof(device_guid), name_buffer, sizeof(name_buffer)); | |
587 | if (rc) | |
588 | return -1; | |
589 | ||
590 | snprintf (device_path, sizeof(device_path), "%s%s%s", | |
591 | USERMODEDEVICEDIR, | |
592 | device_guid, | |
593 | TAPSUFFIX); | |
594 | ||
595 | handle = CreateFile ( | |
596 | device_path, | |
597 | GENERIC_READ | GENERIC_WRITE, | |
598 | 0, | |
599 | 0, | |
600 | OPEN_EXISTING, | |
601 | FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, | |
602 | 0 ); | |
603 | ||
604 | if (handle == INVALID_HANDLE_VALUE) { | |
605 | return -1; | |
606 | } | |
607 | ||
608 | bret = DeviceIoControl(handle, TAP_IOCTL_GET_VERSION, | |
609 | &version, sizeof (version), | |
610 | &version, sizeof (version), &version_len, NULL); | |
611 | ||
612 | if (bret == FALSE) { | |
613 | CloseHandle(handle); | |
614 | return -1; | |
615 | } | |
616 | ||
617 | if (!tap_win32_set_status(handle, TRUE)) { | |
618 | return -1; | |
619 | } | |
620 | ||
621 | tap_win32_overlapped_init(&tap_overlapped, handle); | |
622 | ||
623 | *phandle = &tap_overlapped; | |
624 | ||
625 | hThread = CreateThread(NULL, 0, tap_win32_thread_entry, | |
626 | (LPVOID)&tap_overlapped, 0, &idThread); | |
7fb843f8 FB |
627 | return 0; |
628 | } | |
629 | ||
630 | /********************************************/ | |
631 | ||
632 | typedef struct TAPState { | |
633 | VLANClientState *vc; | |
c227f099 | 634 | tap_win32_overlapped_t *handle; |
7fb843f8 FB |
635 | } TAPState; |
636 | ||
b946a153 AL |
637 | static void tap_cleanup(VLANClientState *vc) |
638 | { | |
639 | TAPState *s = vc->opaque; | |
640 | ||
641 | qemu_del_wait_object(s->handle->tap_semaphore, NULL, NULL); | |
642 | ||
643 | /* FIXME: need to kill thread and close file handle: | |
644 | tap_win32_close(s); | |
645 | */ | |
646 | qemu_free(s); | |
647 | } | |
648 | ||
4f1c942b | 649 | static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size) |
7fb843f8 | 650 | { |
4f1c942b | 651 | TAPState *s = vc->opaque; |
7fb843f8 | 652 | |
4f1c942b | 653 | return tap_win32_write(s->handle, buf, size); |
7fb843f8 FB |
654 | } |
655 | ||
e6cda8e2 | 656 | static void tap_win32_send(void *opaque) |
7fb843f8 | 657 | { |
e6cda8e2 | 658 | TAPState *s = opaque; |
7fb843f8 FB |
659 | uint8_t *buf; |
660 | int max_size = 4096; | |
661 | int size; | |
662 | ||
7fb843f8 FB |
663 | size = tap_win32_read(s->handle, &buf, max_size); |
664 | if (size > 0) { | |
665 | qemu_send_packet(s->vc, buf, size); | |
666 | tap_win32_free_buffer(s->handle, buf); | |
667 | } | |
668 | } | |
669 | ||
a8ed73f7 MM |
670 | static int tap_win32_init(VLANState *vlan, const char *model, |
671 | const char *name, const char *ifname) | |
7fb843f8 FB |
672 | { |
673 | TAPState *s; | |
3b46e624 | 674 | |
7fb843f8 FB |
675 | s = qemu_mallocz(sizeof(TAPState)); |
676 | if (!s) | |
677 | return -1; | |
678 | if (tap_win32_open(&s->handle, ifname) < 0) { | |
679 | printf("tap: Could not open '%s'\n", ifname); | |
680 | return -1; | |
681 | } | |
682 | ||
bb6e6364 MM |
683 | s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_TAP, |
684 | vlan, NULL, model, name, | |
283c7c63 | 685 | NULL, tap_receive, |
70783b9c | 686 | NULL, NULL, tap_cleanup, s); |
3b46e624 | 687 | |
7fb843f8 FB |
688 | snprintf(s->vc->info_str, sizeof(s->vc->info_str), |
689 | "tap: ifname=%s", ifname); | |
a18e524a | 690 | |
e6cda8e2 | 691 | qemu_add_wait_object(s->handle->tap_semaphore, tap_win32_send, s); |
7fb843f8 FB |
692 | return 0; |
693 | } | |
a8ed73f7 MM |
694 | |
695 | int net_init_tap(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan) | |
696 | { | |
697 | const char *ifname; | |
698 | ||
699 | ifname = qemu_opt_get(opts, "ifname"); | |
700 | ||
701 | if (!ifname) { | |
702 | qemu_error("tap: no interface name\n"); | |
703 | return -1; | |
704 | } | |
705 | ||
706 | if (tap_win32_init(vlan, "tap", name, ifname) == -1) { | |
707 | return -1; | |
708 | } | |
709 | ||
710 | if (vlan) { | |
711 | vlan->nb_host_devs++; | |
712 | } | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
717 | int tap_has_ufo(VLANClientState *vc) | |
718 | { | |
719 | return 0; | |
720 | } | |
721 | ||
722 | int tap_has_vnet_hdr(VLANClientState *vc) | |
723 | { | |
724 | return 0; | |
725 | } | |
726 | ||
727 | void tap_using_vnet_hdr(VLANClientState *vc, int using_vnet_hdr) | |
728 | { | |
729 | } | |
730 | ||
731 | void tap_set_offload(VLANClientState *vc, int csum, int tso4, | |
732 | int tso6, int ecn, int ufo) | |
733 | { | |
734 | } |