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