2 * QEMU VNC display driver
5 * Copyright (C) 2006 Fabrice Bellard
6 * Copyright (C) 2009 Red Hat, Inc
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:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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
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"
43 #include "vnc-palette.h"
44 #include "vnc-enc-zrle.h"
45 #include "qapi-types.h"
47 // #define _VNC_DEBUG 1
50 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
52 #define VNC_DEBUG(fmt, ...) do { } while (0)
55 /*****************************************************************************
57 * Core data structures
59 *****************************************************************************/
61 typedef struct VncState VncState;
62 typedef struct VncJob VncJob;
63 typedef struct VncRect VncRect;
64 typedef struct VncRectEntry VncRectEntry;
66 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
68 typedef void VncWritePixels(VncState *vs, void *data, int size);
70 typedef void VncSendHextileTile(VncState *vs,
71 int x, int y, int w, int h,
74 int *has_bg, int *has_fg);
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
80 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */
82 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT)
83 #define VNC_MAX_HEIGHT 2048
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)
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)
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)
96 #define VNC_AUTH_CHALLENGE_SIZE 16
98 typedef struct VncDisplay VncDisplay;
100 #include "vnc-auth-vencrypt.h"
101 #ifdef CONFIG_VNC_SASL
102 #include "vnc-auth-sasl.h"
108 /* time of last 10 updates, to find update frequency */
109 struct timeval times[10];
112 double freq; /* Update frequency (in Hz) */
113 bool updated; /* Already updated during this refresh */
116 typedef struct VncRectStat VncRectStat;
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];
125 pixman_format_code_t format;
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,
135 typedef enum VncSharePolicy {
136 VNC_SHARE_POLICY_IGNORE = 1,
137 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
138 VNC_SHARE_POLICY_FORCE_SHARED,
143 QTAILQ_HEAD(, VncState) clients;
147 int connections_limit;
148 VncSharePolicy share_policy;
150 QIOChannelSocket **lsock;
153 QIOChannelSocket **lwebsock;
156 DisplayChangeListener dcl;
157 kbd_layout_t *kbd_layout;
159 QEMUPutLEDEntry *led;
166 uint8_t *cursor_mask;
168 struct VncSurface guest; /* guest visible surface (aka ds->surface) */
169 pixman_image_t *server; /* vnc server surface */
172 QTAILQ_ENTRY(VncDisplay) next;
177 int subauth; /* Used by VeNCrypt */
178 int ws_auth; /* Used by websockets */
179 int ws_subauth; /* Used by websockets */
182 QCryptoTLSCreds *tlscreds;
184 #ifdef CONFIG_VNC_SASL
189 typedef struct VncTight {
198 #ifdef CONFIG_VNC_JPEG
201 #ifdef CONFIG_VNC_PNG
208 typedef struct VncHextile {
209 VncSendHextileTile *send_tile;
212 typedef struct VncZlib {
219 typedef struct VncZrle {
229 typedef struct VncZywrle {
230 int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
244 QLIST_ENTRY(VncRectEntry) next;
251 QLIST_HEAD(, VncRectEntry) rectangles;
252 QTAILQ_ENTRY(VncJob) next;
256 VNC_STATE_UPDATE_NONE,
257 VNC_STATE_UPDATE_INCREMENTAL,
258 VNC_STATE_UPDATE_FORCE,
263 QIOChannelSocket *sioc; /* The underlying socket */
264 QIOChannel *ioc; /* The channel currently used for I/O */
266 gboolean disconnecting;
268 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
269 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
270 * vnc-jobs-async.c */
273 VncStateUpdate update; /* Most recent pending request from client */
274 VncStateUpdate job_update; /* Currently processed by job thread */
283 VncShareMode share_mode;
285 uint32_t vnc_encoding;
291 int subauth; /* Used by VeNCrypt */
292 char challenge[VNC_AUTH_CHALLENGE_SIZE];
293 QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
294 #ifdef CONFIG_VNC_SASL
302 /* Job thread bottom half has put data for a forced update
303 * into the output buffer. This offset points to the end of
304 * the update data in the output buffer. This lets us determine
305 * when a force update is fully sent to the client, allowing
306 * us to process further forced updates. */
307 size_t force_update_offset;
308 /* We allow multiple incremental updates or audio capture
309 * samples to be queued in output buffer, provided the
310 * buffer size doesn't exceed this threshold. The value
311 * is calculating dynamically based on framebuffer size
312 * and audio sample settings in vnc_update_throttle_offset() */
313 size_t throttle_output_offset;
316 /* current output mode information */
317 VncWritePixels *write_pixels;
318 PixelFormat client_pf;
319 pixman_format_code_t client_format;
322 CaptureVoiceOut *audio_cap;
323 struct audsettings as;
325 VncReadEvent *read_handler;
326 size_t read_handler_expect;
328 uint8_t modifiers_state[256];
331 QemuMutex output_mutex;
335 /* Encoding specific, if you add something here, don't forget to
336 * update vnc_async_encoding_start()
344 Notifier mouse_mode_notifier;
346 QTAILQ_ENTRY(VncState) next;
350 /*****************************************************************************
352 * Authentication modes
354 *****************************************************************************/
357 VNC_AUTH_INVALID = 0,
364 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */
365 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
366 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */
370 VNC_AUTH_VENCRYPT_PLAIN = 256,
371 VNC_AUTH_VENCRYPT_TLSNONE = 257,
372 VNC_AUTH_VENCRYPT_TLSVNC = 258,
373 VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
374 VNC_AUTH_VENCRYPT_X509NONE = 260,
375 VNC_AUTH_VENCRYPT_X509VNC = 261,
376 VNC_AUTH_VENCRYPT_X509PLAIN = 262,
377 VNC_AUTH_VENCRYPT_X509SASL = 263,
378 VNC_AUTH_VENCRYPT_TLSSASL = 264,
382 /*****************************************************************************
386 *****************************************************************************/
388 #define VNC_ENCODING_RAW 0x00000000
389 #define VNC_ENCODING_COPYRECT 0x00000001
390 #define VNC_ENCODING_RRE 0x00000002
391 #define VNC_ENCODING_CORRE 0x00000004
392 #define VNC_ENCODING_HEXTILE 0x00000005
393 #define VNC_ENCODING_ZLIB 0x00000006
394 #define VNC_ENCODING_TIGHT 0x00000007
395 #define VNC_ENCODING_ZLIBHEX 0x00000008
396 #define VNC_ENCODING_TRLE 0x0000000f
397 #define VNC_ENCODING_ZRLE 0x00000010
398 #define VNC_ENCODING_ZYWRLE 0x00000011
399 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */
400 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */
401 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */
402 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */
403 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */
404 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */
405 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */
406 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */
407 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */
408 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */
409 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */
410 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */
411 #define VNC_ENCODING_WMVi 0x574D5669
413 /*****************************************************************************
415 * Other tight constants
417 *****************************************************************************/
420 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
423 #define VNC_TIGHT_CCB_RESET_MASK (0x0f)
424 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4)
425 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4)
426 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4)
427 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4)
428 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4)
429 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4)
430 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
432 /*****************************************************************************
436 *****************************************************************************/
438 #define VNC_FEATURE_RESIZE 0
439 #define VNC_FEATURE_HEXTILE 1
440 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2
441 #define VNC_FEATURE_WMVI 3
442 #define VNC_FEATURE_TIGHT 4
443 #define VNC_FEATURE_ZLIB 5
444 #define VNC_FEATURE_COPYRECT 6
445 #define VNC_FEATURE_RICH_CURSOR 7
446 #define VNC_FEATURE_TIGHT_PNG 8
447 #define VNC_FEATURE_ZRLE 9
448 #define VNC_FEATURE_ZYWRLE 10
449 #define VNC_FEATURE_LED_STATE 11
451 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE)
452 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE)
453 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
454 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI)
455 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT)
456 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB)
457 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT)
458 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR)
459 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG)
460 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE)
461 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE)
462 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE)
465 /* Client -> Server message IDs */
466 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0
467 #define VNC_MSG_CLIENT_SET_ENCODINGS 2
468 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
469 #define VNC_MSG_CLIENT_KEY_EVENT 4
470 #define VNC_MSG_CLIENT_POINTER_EVENT 5
471 #define VNC_MSG_CLIENT_CUT_TEXT 6
472 #define VNC_MSG_CLIENT_VMWARE_0 127
473 #define VNC_MSG_CLIENT_CALL_CONTROL 249
474 #define VNC_MSG_CLIENT_XVP 250
475 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251
476 #define VNC_MSG_CLIENT_TIGHT 252
477 #define VNC_MSG_CLIENT_GII 253
478 #define VNC_MSG_CLIENT_VMWARE_1 254
479 #define VNC_MSG_CLIENT_QEMU 255
481 /* Server -> Client message IDs */
482 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0
483 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1
484 #define VNC_MSG_SERVER_BELL 2
485 #define VNC_MSG_SERVER_CUT_TEXT 3
486 #define VNC_MSG_SERVER_VMWARE_0 127
487 #define VNC_MSG_SERVER_CALL_CONTROL 249
488 #define VNC_MSG_SERVER_XVP 250
489 #define VNC_MSG_SERVER_TIGHT 252
490 #define VNC_MSG_SERVER_GII 253
491 #define VNC_MSG_SERVER_VMWARE_1 254
492 #define VNC_MSG_SERVER_QEMU 255
496 /* QEMU client -> server message IDs */
497 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0
498 #define VNC_MSG_CLIENT_QEMU_AUDIO 1
500 /* QEMU server -> client message IDs */
501 #define VNC_MSG_SERVER_QEMU_AUDIO 1
505 /* QEMU client -> server audio message IDs */
506 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0
507 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1
508 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2
510 /* QEMU server -> client audio message IDs */
511 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0
512 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1
513 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2
516 /*****************************************************************************
520 *****************************************************************************/
522 /* Event loop functions */
523 gboolean vnc_client_io(QIOChannel *ioc,
524 GIOCondition condition,
527 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
528 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
530 /* Protocol I/O functions */
531 void vnc_write(VncState *vs, const void *data, size_t len);
532 void vnc_write_u32(VncState *vs, uint32_t value);
533 void vnc_write_s32(VncState *vs, int32_t value);
534 void vnc_write_u16(VncState *vs, uint16_t value);
535 void vnc_write_u8(VncState *vs, uint8_t value);
536 void vnc_flush(VncState *vs);
537 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
538 void vnc_disconnect_finish(VncState *vs);
539 void vnc_start_protocol(VncState *vs);
542 /* Buffer I/O functions */
543 uint32_t read_u32(uint8_t *data, size_t offset);
545 /* Protocol stage functions */
546 void vnc_client_error(VncState *vs);
547 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp);
549 void start_client_init(VncState *vs);
550 void start_auth_vnc(VncState *vs);
555 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
556 return (vs->features & (1 << feature));
560 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
563 /* server fb is in PIXMAN_x8r8g8b8 */
564 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
565 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
566 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8)
568 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
569 int vnc_server_fb_stride(VncDisplay *vd);
571 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
572 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
573 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
576 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
578 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
580 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
581 int y, int w, int h);
582 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
584 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
585 void vnc_zlib_zfree(void *x, void *addr);
586 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
587 void vnc_zlib_clear(VncState *vs);
589 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
590 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
592 void vnc_tight_clear(VncState *vs);
594 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
595 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
596 void vnc_zrle_clear(VncState *vs);
598 #endif /* QEMU_VNC_H */