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 #ifdef CONFIG_VNC_THREAD
  33 #include "qemu-thread.h"
  34 #endif
  35 #include "console.h"
  36 #include "monitor.h"
  37 #include "audio/audio.h"
  38 #include "bitmap.h"
  39 #include <zlib.h>
  40 #include <stdbool.h>
  41
  42 #include "keymaps.h"
  43 #include "vnc-palette.h"
  44 #include "vnc-enc-zrle.h"
  45
  46 // #define _VNC_DEBUG 1
  47
  48 #ifdef _VNC_DEBUG
  49 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  50 #else
  51 #define VNC_DEBUG(fmt, ...) do { } while (0)
  52 #endif
  53
  54 /*****************************************************************************
  55  *
  56  * Core data structures
  57  *
  58  *****************************************************************************/
  59
  60 typedef struct Buffer
  61 {
  62     size_t capacity;
  63     size_t offset;
  64     uint8_t *buffer;
  65 } Buffer;
  66
  67 typedef struct VncState VncState;
  68 typedef struct VncJob VncJob;
  69 typedef struct VncRect VncRect;
  70 typedef struct VncRectEntry VncRectEntry;
  71
  72 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  73
  74 typedef void VncWritePixels(VncState *vs, struct PixelFormat *pf, void *data, int size);
  75
  76 typedef void VncSendHextileTile(VncState *vs,
  77                                 int x, int y, int w, int h,
  78                                 void *last_bg,
  79                                 void *last_fg,
  80                                 int *has_bg, int *has_fg);
  81
  82 /* VNC_MAX_WIDTH must be a multiple of 16. */
  83 #define VNC_MAX_WIDTH 2560
  84 #define VNC_MAX_HEIGHT 2048
  85
  86 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
  87 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / 16)
  88
  89 #define VNC_STAT_RECT  64
  90 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
  91 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
  92
  93 #define VNC_AUTH_CHALLENGE_SIZE 16
  94
  95 typedef struct VncDisplay VncDisplay;
  96
  97 #ifdef CONFIG_VNC_TLS
  98 #include "vnc-tls.h"
  99 #include "vnc-auth-vencrypt.h"
 100 #endif
 101 #ifdef CONFIG_VNC_SASL
 102 #include "vnc-auth-sasl.h"
 103 #endif
 104
 105 struct VncRectStat
 106 {
 107     /* time of last 10 updates, to find update frequency */
 108     struct timeval times[10];
 109     int idx;
 110
 111     double freq;        /* Update frequency (in Hz) */
 112     bool updated;       /* Already updated during this refresh */
 113 };
 114
 115 typedef struct VncRectStat VncRectStat;
 116
 117 struct VncSurface
 118 {
 119     struct timeval last_freq_check;
 120     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_MAX_WIDTH / 16);
 121     VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
 122     DisplaySurface *ds;
 123 };
 124
 125 struct VncDisplay
 126 {
 127     QTAILQ_HEAD(, VncState) clients;
 128     QEMUTimer *timer;
 129     int timer_interval;
 130     int lsock;
 131     DisplayState *ds;
 132     kbd_layout_t *kbd_layout;
 133     int lock_key_sync;
 134 #ifdef CONFIG_VNC_THREAD
 135     QemuMutex mutex;
 136 #endif
 137
 138     QEMUCursor *cursor;
 139     int cursor_msize;
 140     uint8_t *cursor_mask;
 141
 142     struct VncSurface guest;   /* guest visible surface (aka ds->surface) */
 143     DisplaySurface *server;  /* vnc server surface */
 144
 145     char *display;
 146     char *password;
 147     time_t expires;
 148     int auth;
 149     bool lossy;
 150     bool non_adaptive;
 151 #ifdef CONFIG_VNC_TLS
 152     int subauth; /* Used by VeNCrypt */
 153     VncDisplayTLS tls;
 154 #endif
 155 #ifdef CONFIG_VNC_SASL
 156     VncDisplaySASL sasl;
 157 #endif
 158 };
 159
 160 typedef struct VncTight {
 161     int type;
 162     uint8_t quality;
 163     uint8_t compression;
 164     uint8_t pixel24;
 165     Buffer tight;
 166     Buffer tmp;
 167     Buffer zlib;
 168     Buffer gradient;
 169 #ifdef CONFIG_VNC_JPEG
 170     Buffer jpeg;
 171 #endif
 172 #ifdef CONFIG_VNC_PNG
 173     Buffer png;
 174 #endif
 175     int levels[4];
 176     z_stream stream[4];
 177 } VncTight;
 178
 179 typedef struct VncHextile {
 180     VncSendHextileTile *send_tile;
 181 } VncHextile;
 182
 183 typedef struct VncZlib {
 184     Buffer zlib;
 185     Buffer tmp;
 186     z_stream stream;
 187     int level;
 188 } VncZlib;
 189
 190 typedef struct VncZrle {
 191     int type;
 192     Buffer fb;
 193     Buffer zrle;
 194     Buffer tmp;
 195     Buffer zlib;
 196     z_stream stream;
 197     VncPalette palette;
 198 } VncZrle;
 199
 200 typedef struct VncZywrle {
 201     int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 202 } VncZywrle;
 203
 204 #ifdef CONFIG_VNC_THREAD
 205 struct VncRect
 206 {
 207     int x;
 208     int y;
 209     int w;
 210     int h;
 211 };
 212
 213 struct VncRectEntry
 214 {
 215     struct VncRect rect;
 216     QLIST_ENTRY(VncRectEntry) next;
 217 };
 218
 219 struct VncJob
 220 {
 221     VncState *vs;
 222
 223     QLIST_HEAD(, VncRectEntry) rectangles;
 224     QTAILQ_ENTRY(VncJob) next;
 225 };
 226 #else
 227 struct VncJob
 228 {
 229     VncState *vs;
 230     int rectangles;
 231     size_t saved_offset;
 232 };
 233 #endif
 234
 235 struct VncState
 236 {
 237     int csock;
 238
 239     DisplayState *ds;
 240     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 241     uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 242                            * vnc-jobs-async.c */
 243
 244     VncDisplay *vd;
 245     int need_update;
 246     int force_update;
 247     uint32_t features;
 248     int absolute;
 249     int last_x;
 250     int last_y;
 251     int client_width;
 252     int client_height;
 253
 254     uint32_t vnc_encoding;
 255
 256     int major;
 257     int minor;
 258
 259     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 260 #ifdef CONFIG_VNC_TLS
 261     VncStateTLS tls;
 262 #endif
 263 #ifdef CONFIG_VNC_SASL
 264     VncStateSASL sasl;
 265 #endif
 266
 267     QObject *info;
 268
 269     Buffer output;
 270     Buffer input;
 271     /* current output mode information */
 272     VncWritePixels *write_pixels;
 273     DisplaySurface clientds;
 274
 275     CaptureVoiceOut *audio_cap;
 276     struct audsettings as;
 277
 278     VncReadEvent *read_handler;
 279     size_t read_handler_expect;
 280     /* input */
 281     uint8_t modifiers_state[256];
 282     QEMUPutLEDEntry *led;
 283
 284     bool abort;
 285 #ifndef CONFIG_VNC_THREAD
 286     VncJob job;
 287 #else
 288     QemuMutex output_mutex;
 289 #endif
 290
 291     /* Encoding specific, if you add something here, don't forget to
 292      *  update vnc_async_encoding_start()
 293      */
 294     VncTight tight;
 295     VncZlib zlib;
 296     VncHextile hextile;
 297     VncZrle zrle;
 298     VncZywrle zywrle;
 299
 300     Notifier mouse_mode_notifier;
 301
 302     QTAILQ_ENTRY(VncState) next;
 303 };
 304
 305
 306 /*****************************************************************************
 307  *
 308  * Authentication modes
 309  *
 310  *****************************************************************************/
 311
 312 enum {
 313     VNC_AUTH_INVALID = 0,
 314     VNC_AUTH_NONE = 1,
 315     VNC_AUTH_VNC = 2,
 316     VNC_AUTH_RA2 = 5,
 317     VNC_AUTH_RA2NE = 6,
 318     VNC_AUTH_TIGHT = 16,
 319     VNC_AUTH_ULTRA = 17,
 320     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 321     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 322     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 323 };
 324
 325 enum {
 326     VNC_AUTH_VENCRYPT_PLAIN = 256,
 327     VNC_AUTH_VENCRYPT_TLSNONE = 257,
 328     VNC_AUTH_VENCRYPT_TLSVNC = 258,
 329     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 330     VNC_AUTH_VENCRYPT_X509NONE = 260,
 331     VNC_AUTH_VENCRYPT_X509VNC = 261,
 332     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 333     VNC_AUTH_VENCRYPT_X509SASL = 263,
 334     VNC_AUTH_VENCRYPT_TLSSASL = 264,
 335 };
 336
 337
 338 /*****************************************************************************
 339  *
 340  * Encoding types
 341  *
 342  *****************************************************************************/
 343
 344 #define VNC_ENCODING_RAW                  0x00000000
 345 #define VNC_ENCODING_COPYRECT             0x00000001
 346 #define VNC_ENCODING_RRE                  0x00000002
 347 #define VNC_ENCODING_CORRE                0x00000004
 348 #define VNC_ENCODING_HEXTILE              0x00000005
 349 #define VNC_ENCODING_ZLIB                 0x00000006
 350 #define VNC_ENCODING_TIGHT                0x00000007
 351 #define VNC_ENCODING_ZLIBHEX              0x00000008
 352 #define VNC_ENCODING_TRLE                 0x0000000f
 353 #define VNC_ENCODING_ZRLE                 0x00000010
 354 #define VNC_ENCODING_ZYWRLE               0x00000011
 355 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 356 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 357 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 358 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 359 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 360 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 361 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 362 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 363 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 364 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 365 #define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 366 #define VNC_ENCODING_WMVi                 0x574D5669
 367
 368 /*****************************************************************************
 369  *
 370  * Other tight constants
 371  *
 372  *****************************************************************************/
 373
 374 /*
 375  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 376  */
 377
 378 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 379 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 380 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 381 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 382 #define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 383 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 384 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 385 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 386
 387 /*****************************************************************************
 388  *
 389  * Features
 390  *
 391  *****************************************************************************/
 392
 393 #define VNC_FEATURE_RESIZE                   0
 394 #define VNC_FEATURE_HEXTILE                  1
 395 #define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 396 #define VNC_FEATURE_WMVI                     3
 397 #define VNC_FEATURE_TIGHT                    4
 398 #define VNC_FEATURE_ZLIB                     5
 399 #define VNC_FEATURE_COPYRECT                 6
 400 #define VNC_FEATURE_RICH_CURSOR              7
 401 #define VNC_FEATURE_TIGHT_PNG                8
 402 #define VNC_FEATURE_ZRLE                     9
 403 #define VNC_FEATURE_ZYWRLE                  10
 404
 405 #define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 406 #define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 407 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 408 #define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 409 #define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 410 #define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 411 #define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 412 #define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 413 #define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 414 #define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 415 #define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 416
 417
 418 /* Client -> Server message IDs */
 419 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 420 #define VNC_MSG_CLIENT_SET_ENCODINGS              2
 421 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 422 #define VNC_MSG_CLIENT_KEY_EVENT                  4
 423 #define VNC_MSG_CLIENT_POINTER_EVENT              5
 424 #define VNC_MSG_CLIENT_CUT_TEXT                   6
 425 #define VNC_MSG_CLIENT_VMWARE_0                   127
 426 #define VNC_MSG_CLIENT_CALL_CONTROL               249
 427 #define VNC_MSG_CLIENT_XVP                        250
 428 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 429 #define VNC_MSG_CLIENT_TIGHT                      252
 430 #define VNC_MSG_CLIENT_GII                        253
 431 #define VNC_MSG_CLIENT_VMWARE_1                   254
 432 #define VNC_MSG_CLIENT_QEMU                       255
 433
 434 /* Server -> Client message IDs */
 435 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 436 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 437 #define VNC_MSG_SERVER_BELL                       2
 438 #define VNC_MSG_SERVER_CUT_TEXT                   3
 439 #define VNC_MSG_SERVER_VMWARE_0                   127
 440 #define VNC_MSG_SERVER_CALL_CONTROL               249
 441 #define VNC_MSG_SERVER_XVP                        250
 442 #define VNC_MSG_SERVER_TIGHT                      252
 443 #define VNC_MSG_SERVER_GII                        253
 444 #define VNC_MSG_SERVER_VMWARE_1                   254
 445 #define VNC_MSG_SERVER_QEMU                       255
 446
 447
 448
 449 /* QEMU client -> server message IDs */
 450 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 451 #define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 452
 453 /* QEMU server -> client message IDs */
 454 #define VNC_MSG_SERVER_QEMU_AUDIO                 1
 455
 456
 457
 458 /* QEMU client -> server audio message IDs */
 459 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 460 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 461 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 462
 463 /* QEMU server -> client audio message IDs */
 464 #define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 465 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 466 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 467
 468
 469 /*****************************************************************************
 470  *
 471  * Internal APIs
 472  *
 473  *****************************************************************************/
 474
 475 /* Event loop functions */
 476 void vnc_client_read(void *opaque);
 477 void vnc_client_write(void *opaque);
 478
 479 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 480 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 481
 482 /* Protocol I/O functions */
 483 void vnc_write(VncState *vs, const void *data, size_t len);
 484 void vnc_write_u32(VncState *vs, uint32_t value);
 485 void vnc_write_s32(VncState *vs, int32_t value);
 486 void vnc_write_u16(VncState *vs, uint16_t value);
 487 void vnc_write_u8(VncState *vs, uint8_t value);
 488 void vnc_flush(VncState *vs);
 489 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 490
 491
 492 /* Buffer I/O functions */
 493 uint8_t read_u8(uint8_t *data, size_t offset);
 494 uint16_t read_u16(uint8_t *data, size_t offset);
 495 int32_t read_s32(uint8_t *data, size_t offset);
 496 uint32_t read_u32(uint8_t *data, size_t offset);
 497
 498 /* Protocol stage functions */
 499 void vnc_client_error(VncState *vs);
 500 int vnc_client_io_error(VncState *vs, int ret, int last_errno);
 501
 502 void start_client_init(VncState *vs);
 503 void start_auth_vnc(VncState *vs);
 504
 505 /* Buffer management */
 506 void buffer_reserve(Buffer *buffer, size_t len);
 507 int buffer_empty(Buffer *buffer);
 508 uint8_t *buffer_end(Buffer *buffer);
 509 void buffer_reset(Buffer *buffer);
 510 void buffer_free(Buffer *buffer);
 511 void buffer_append(Buffer *buffer, const void *data, size_t len);
 512
 513
 514 /* Misc helpers */
 515
 516 char *vnc_socket_local_addr(const char *format, int fd);
 517 char *vnc_socket_remote_addr(const char *format, int fd);
 518
 519 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 520     return (vs->features & (1 << feature));
 521 }
 522
 523 /* Framebuffer */
 524 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 525                             int32_t encoding);
 526
 527 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 528 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 529 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 530
 531 /* Encodings */
 532 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 533
 534 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 535
 536 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 537                                          int y, int w, int h);
 538 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 539
 540 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 541 void vnc_zlib_zfree(void *x, void *addr);
 542 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 543 void vnc_zlib_clear(VncState *vs);
 544
 545 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 546 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 547                                           int w, int h);
 548 void vnc_tight_clear(VncState *vs);
 549
 550 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 551 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 552 void vnc_zrle_clear(VncState *vs);
 553
 554 #endif /* __QEMU_VNC_H */