scsi: esp: check buffer length before reading scsi command
[qemu.git] / ui / vnc.h
1 /*
2 * QEMU VNC display driver
3 *
4 * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
5 * Copyright (C) 2006 Fabrice Bellard
6 * Copyright (C) 2009 Red Hat, Inc
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
27 #ifndef __QEMU_VNC_H
28 #define __QEMU_VNC_H
29
30 #include "qemu-common.h"
31 #include "qemu/queue.h"
32 #include "qemu/thread.h"
33 #include "ui/console.h"
34 #include "audio/audio.h"
35 #include "qemu/bitmap.h"
36 #include "crypto/tlssession.h"
37 #include "qemu/buffer.h"
38 #include "io/channel-socket.h"
39 #include "io/channel-tls.h"
40 #include <zlib.h>
41
42 #include "keymaps.h"
43 #include "vnc-palette.h"
44 #include "vnc-enc-zrle.h"
45 #include "qapi-types.h"
46
47 // #define _VNC_DEBUG 1
48
49 #ifdef _VNC_DEBUG
50 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
51 #else
52 #define VNC_DEBUG(fmt, ...) do { } while (0)
53 #endif
54
55 /*****************************************************************************
56 *
57 * Core data structures
58 *
59 *****************************************************************************/
60
61 typedef struct VncState VncState;
62 typedef struct VncJob VncJob;
63 typedef struct VncRect VncRect;
64 typedef struct VncRectEntry VncRectEntry;
65
66 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
67
68 typedef void VncWritePixels(VncState *vs, void *data, int size);
69
70 typedef void VncSendHextileTile(VncState *vs,
71 int x, int y, int w, int h,
72 void *last_bg,
73 void *last_fg,
74 int *has_bg, int *has_fg);
75
76 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented
77 * by one bit in the dirty bitmap, should be a power of 2 */
78 #define VNC_DIRTY_PIXELS_PER_BIT 16
79
80 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */
81
82 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT)
83 #define VNC_MAX_HEIGHT 2048
84
85 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
86 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT)
87
88 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than
89 * VNC_DIRTY_BITS due to alignment */
90 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE)
91
92 #define VNC_STAT_RECT 64
93 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
94 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
95
96 #define VNC_AUTH_CHALLENGE_SIZE 16
97
98 typedef struct VncDisplay VncDisplay;
99
100 #include "vnc-auth-vencrypt.h"
101 #ifdef CONFIG_VNC_SASL
102 #include "vnc-auth-sasl.h"
103 #endif
104 #include "vnc-ws.h"
105
106 struct VncRectStat
107 {
108 /* time of last 10 updates, to find update frequency */
109 struct timeval times[10];
110 int idx;
111
112 double freq; /* Update frequency (in Hz) */
113 bool updated; /* Already updated during this refresh */
114 };
115
116 typedef struct VncRectStat VncRectStat;
117
118 struct VncSurface
119 {
120 struct timeval last_freq_check;
121 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
122 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT);
123 VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
124 pixman_image_t *fb;
125 pixman_format_code_t format;
126 };
127
128 typedef enum VncShareMode {
129 VNC_SHARE_MODE_CONNECTING = 1,
130 VNC_SHARE_MODE_SHARED,
131 VNC_SHARE_MODE_EXCLUSIVE,
132 VNC_SHARE_MODE_DISCONNECTED,
133 } VncShareMode;
134
135 typedef enum VncSharePolicy {
136 VNC_SHARE_POLICY_IGNORE = 1,
137 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
138 VNC_SHARE_POLICY_FORCE_SHARED,
139 } VncSharePolicy;
140
141 struct VncDisplay
142 {
143 QTAILQ_HEAD(, VncState) clients;
144 int num_connecting;
145 int num_shared;
146 int num_exclusive;
147 int connections_limit;
148 VncSharePolicy share_policy;
149 QIOChannelSocket *lsock;
150 guint lsock_tag;
151 QIOChannelSocket *lwebsock;
152 guint lwebsock_tag;
153 bool ws_enabled;
154 DisplaySurface *ds;
155 DisplayChangeListener dcl;
156 kbd_layout_t *kbd_layout;
157 int lock_key_sync;
158 int key_delay_ms;
159 QemuMutex mutex;
160
161 QEMUCursor *cursor;
162 int cursor_msize;
163 uint8_t *cursor_mask;
164
165 struct VncSurface guest; /* guest visible surface (aka ds->surface) */
166 pixman_image_t *server; /* vnc server surface */
167
168 const char *id;
169 QTAILQ_ENTRY(VncDisplay) next;
170 bool enabled;
171 bool is_unix;
172 char *password;
173 time_t expires;
174 int auth;
175 int subauth; /* Used by VeNCrypt */
176 int ws_auth; /* Used by websockets */
177 bool ws_tls; /* Used by websockets */
178 bool lossy;
179 bool non_adaptive;
180 QCryptoTLSCreds *tlscreds;
181 char *tlsaclname;
182 #ifdef CONFIG_VNC_SASL
183 VncDisplaySASL sasl;
184 #endif
185 };
186
187 typedef struct VncTight {
188 int type;
189 uint8_t quality;
190 uint8_t compression;
191 uint8_t pixel24;
192 Buffer tight;
193 Buffer tmp;
194 Buffer zlib;
195 Buffer gradient;
196 #ifdef CONFIG_VNC_JPEG
197 Buffer jpeg;
198 #endif
199 #ifdef CONFIG_VNC_PNG
200 Buffer png;
201 #endif
202 int levels[4];
203 z_stream stream[4];
204 } VncTight;
205
206 typedef struct VncHextile {
207 VncSendHextileTile *send_tile;
208 } VncHextile;
209
210 typedef struct VncZlib {
211 Buffer zlib;
212 Buffer tmp;
213 z_stream stream;
214 int level;
215 } VncZlib;
216
217 typedef struct VncZrle {
218 int type;
219 Buffer fb;
220 Buffer zrle;
221 Buffer tmp;
222 Buffer zlib;
223 z_stream stream;
224 VncPalette palette;
225 } VncZrle;
226
227 typedef struct VncZywrle {
228 int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
229 } VncZywrle;
230
231 struct VncRect
232 {
233 int x;
234 int y;
235 int w;
236 int h;
237 };
238
239 struct VncRectEntry
240 {
241 struct VncRect rect;
242 QLIST_ENTRY(VncRectEntry) next;
243 };
244
245 struct VncJob
246 {
247 VncState *vs;
248
249 QLIST_HEAD(, VncRectEntry) rectangles;
250 QTAILQ_ENTRY(VncJob) next;
251 };
252
253 struct VncState
254 {
255 QIOChannelSocket *sioc; /* The underlying socket */
256 QIOChannel *ioc; /* The channel currently used for I/O */
257 guint ioc_tag;
258 gboolean disconnecting;
259
260 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
261 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
262 * vnc-jobs-async.c */
263
264 VncDisplay *vd;
265 int need_update;
266 int force_update;
267 int has_dirty;
268 uint32_t features;
269 int absolute;
270 int last_x;
271 int last_y;
272 uint32_t last_bmask;
273 int client_width;
274 int client_height;
275 VncShareMode share_mode;
276
277 uint32_t vnc_encoding;
278
279 int major;
280 int minor;
281
282 int auth;
283 int subauth; /* Used by VeNCrypt */
284 char challenge[VNC_AUTH_CHALLENGE_SIZE];
285 QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
286 #ifdef CONFIG_VNC_SASL
287 VncStateSASL sasl;
288 #endif
289 bool encode_ws;
290 bool websocket;
291
292 VncClientInfo *info;
293
294 Buffer output;
295 Buffer input;
296 /* current output mode information */
297 VncWritePixels *write_pixels;
298 PixelFormat client_pf;
299 pixman_format_code_t client_format;
300 bool client_be;
301
302 CaptureVoiceOut *audio_cap;
303 struct audsettings as;
304
305 VncReadEvent *read_handler;
306 size_t read_handler_expect;
307 /* input */
308 uint8_t modifiers_state[256];
309 QEMUPutLEDEntry *led;
310
311 bool abort;
312 bool initialized;
313 QemuMutex output_mutex;
314 QEMUBH *bh;
315 Buffer jobs_buffer;
316
317 /* Encoding specific, if you add something here, don't forget to
318 * update vnc_async_encoding_start()
319 */
320 VncTight tight;
321 VncZlib zlib;
322 VncHextile hextile;
323 VncZrle zrle;
324 VncZywrle zywrle;
325
326 Notifier mouse_mode_notifier;
327
328 QTAILQ_ENTRY(VncState) next;
329 };
330
331
332 /*****************************************************************************
333 *
334 * Authentication modes
335 *
336 *****************************************************************************/
337
338 enum {
339 VNC_AUTH_INVALID = 0,
340 VNC_AUTH_NONE = 1,
341 VNC_AUTH_VNC = 2,
342 VNC_AUTH_RA2 = 5,
343 VNC_AUTH_RA2NE = 6,
344 VNC_AUTH_TIGHT = 16,
345 VNC_AUTH_ULTRA = 17,
346 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */
347 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
348 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */
349 };
350
351 enum {
352 VNC_AUTH_VENCRYPT_PLAIN = 256,
353 VNC_AUTH_VENCRYPT_TLSNONE = 257,
354 VNC_AUTH_VENCRYPT_TLSVNC = 258,
355 VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
356 VNC_AUTH_VENCRYPT_X509NONE = 260,
357 VNC_AUTH_VENCRYPT_X509VNC = 261,
358 VNC_AUTH_VENCRYPT_X509PLAIN = 262,
359 VNC_AUTH_VENCRYPT_X509SASL = 263,
360 VNC_AUTH_VENCRYPT_TLSSASL = 264,
361 };
362
363
364 /*****************************************************************************
365 *
366 * Encoding types
367 *
368 *****************************************************************************/
369
370 #define VNC_ENCODING_RAW 0x00000000
371 #define VNC_ENCODING_COPYRECT 0x00000001
372 #define VNC_ENCODING_RRE 0x00000002
373 #define VNC_ENCODING_CORRE 0x00000004
374 #define VNC_ENCODING_HEXTILE 0x00000005
375 #define VNC_ENCODING_ZLIB 0x00000006
376 #define VNC_ENCODING_TIGHT 0x00000007
377 #define VNC_ENCODING_ZLIBHEX 0x00000008
378 #define VNC_ENCODING_TRLE 0x0000000f
379 #define VNC_ENCODING_ZRLE 0x00000010
380 #define VNC_ENCODING_ZYWRLE 0x00000011
381 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */
382 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */
383 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */
384 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */
385 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */
386 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */
387 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */
388 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */
389 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */
390 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */
391 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */
392 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */
393 #define VNC_ENCODING_WMVi 0x574D5669
394
395 /*****************************************************************************
396 *
397 * Other tight constants
398 *
399 *****************************************************************************/
400
401 /*
402 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
403 */
404
405 #define VNC_TIGHT_CCB_RESET_MASK (0x0f)
406 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4)
407 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4)
408 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4)
409 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4)
410 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4)
411 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4)
412 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
413
414 /*****************************************************************************
415 *
416 * Features
417 *
418 *****************************************************************************/
419
420 #define VNC_FEATURE_RESIZE 0
421 #define VNC_FEATURE_HEXTILE 1
422 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2
423 #define VNC_FEATURE_WMVI 3
424 #define VNC_FEATURE_TIGHT 4
425 #define VNC_FEATURE_ZLIB 5
426 #define VNC_FEATURE_COPYRECT 6
427 #define VNC_FEATURE_RICH_CURSOR 7
428 #define VNC_FEATURE_TIGHT_PNG 8
429 #define VNC_FEATURE_ZRLE 9
430 #define VNC_FEATURE_ZYWRLE 10
431 #define VNC_FEATURE_LED_STATE 11
432
433 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE)
434 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE)
435 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
436 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI)
437 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT)
438 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB)
439 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT)
440 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR)
441 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG)
442 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE)
443 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE)
444 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE)
445
446
447 /* Client -> Server message IDs */
448 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0
449 #define VNC_MSG_CLIENT_SET_ENCODINGS 2
450 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
451 #define VNC_MSG_CLIENT_KEY_EVENT 4
452 #define VNC_MSG_CLIENT_POINTER_EVENT 5
453 #define VNC_MSG_CLIENT_CUT_TEXT 6
454 #define VNC_MSG_CLIENT_VMWARE_0 127
455 #define VNC_MSG_CLIENT_CALL_CONTROL 249
456 #define VNC_MSG_CLIENT_XVP 250
457 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251
458 #define VNC_MSG_CLIENT_TIGHT 252
459 #define VNC_MSG_CLIENT_GII 253
460 #define VNC_MSG_CLIENT_VMWARE_1 254
461 #define VNC_MSG_CLIENT_QEMU 255
462
463 /* Server -> Client message IDs */
464 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0
465 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1
466 #define VNC_MSG_SERVER_BELL 2
467 #define VNC_MSG_SERVER_CUT_TEXT 3
468 #define VNC_MSG_SERVER_VMWARE_0 127
469 #define VNC_MSG_SERVER_CALL_CONTROL 249
470 #define VNC_MSG_SERVER_XVP 250
471 #define VNC_MSG_SERVER_TIGHT 252
472 #define VNC_MSG_SERVER_GII 253
473 #define VNC_MSG_SERVER_VMWARE_1 254
474 #define VNC_MSG_SERVER_QEMU 255
475
476
477
478 /* QEMU client -> server message IDs */
479 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0
480 #define VNC_MSG_CLIENT_QEMU_AUDIO 1
481
482 /* QEMU server -> client message IDs */
483 #define VNC_MSG_SERVER_QEMU_AUDIO 1
484
485
486
487 /* QEMU client -> server audio message IDs */
488 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0
489 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1
490 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2
491
492 /* QEMU server -> client audio message IDs */
493 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0
494 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1
495 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2
496
497
498 /*****************************************************************************
499 *
500 * Internal APIs
501 *
502 *****************************************************************************/
503
504 /* Event loop functions */
505 gboolean vnc_client_io(QIOChannel *ioc,
506 GIOCondition condition,
507 void *opaque);
508
509 ssize_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
510 ssize_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
511
512 /* Protocol I/O functions */
513 void vnc_write(VncState *vs, const void *data, size_t len);
514 void vnc_write_u32(VncState *vs, uint32_t value);
515 void vnc_write_s32(VncState *vs, int32_t value);
516 void vnc_write_u16(VncState *vs, uint16_t value);
517 void vnc_write_u8(VncState *vs, uint8_t value);
518 void vnc_flush(VncState *vs);
519 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
520 void vnc_disconnect_finish(VncState *vs);
521 void vnc_init_state(VncState *vs);
522
523
524 /* Buffer I/O functions */
525 uint32_t read_u32(uint8_t *data, size_t offset);
526
527 /* Protocol stage functions */
528 void vnc_client_error(VncState *vs);
529 ssize_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp);
530
531 void start_client_init(VncState *vs);
532 void start_auth_vnc(VncState *vs);
533
534
535 /* Misc helpers */
536
537 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
538 return (vs->features & (1 << feature));
539 }
540
541 /* Framebuffer */
542 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
543 int32_t encoding);
544
545 /* server fb is in PIXMAN_x8r8g8b8 */
546 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
547 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
548 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8)
549
550 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
551 int vnc_server_fb_stride(VncDisplay *vd);
552
553 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
554 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
555 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
556
557 /* Encodings */
558 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
559
560 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
561
562 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
563 int y, int w, int h);
564 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
565
566 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
567 void vnc_zlib_zfree(void *x, void *addr);
568 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
569 void vnc_zlib_clear(VncState *vs);
570
571 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
572 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
573 int w, int h);
574 void vnc_tight_clear(VncState *vs);
575
576 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
577 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
578 void vnc_zrle_clear(VncState *vs);
579
580 #endif /* __QEMU_VNC_H */