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 "console.h"
  34 #include "monitor.h"
  35 #include "audio/audio.h"
  36 #include "bitmap.h"
  37 #include <zlib.h>
  38 #include <stdbool.h>
  39
  40 #include "keymaps.h"
  41 #include "vnc-palette.h"
  42 #include "vnc-enc-zrle.h"
  43
  44 // #define _VNC_DEBUG 1
  45
  46 #ifdef _VNC_DEBUG
  47 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  48 #else
  49 #define VNC_DEBUG(fmt, ...) do { } while (0)
  50 #endif
  51
  52 /*****************************************************************************
  53  *
  54  * Core data structures
  55  *
  56  *****************************************************************************/
  57
  58 typedef struct Buffer
  59 {
  60     size_t capacity;
  61     size_t offset;
  62     uint8_t *buffer;
  63 } Buffer;
  64
  65 typedef struct VncState VncState;
  66 typedef struct VncJob VncJob;
  67 typedef struct VncRect VncRect;
  68 typedef struct VncRectEntry VncRectEntry;
  69
  70 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  71
  72 typedef void VncWritePixels(VncState *vs, struct PixelFormat *pf, void *data, int size);
  73
  74 typedef void VncSendHextileTile(VncState *vs,
  75                                 int x, int y, int w, int h,
  76                                 void *last_bg,
  77                                 void *last_fg,
  78                                 int *has_bg, int *has_fg);
  79
  80 /* VNC_MAX_WIDTH must be a multiple of 16. */
  81 #define VNC_MAX_WIDTH 2560
  82 #define VNC_MAX_HEIGHT 2048
  83
  84 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
  85 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / 16)
  86
  87 #define VNC_STAT_RECT  64
  88 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
  89 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
  90
  91 #define VNC_AUTH_CHALLENGE_SIZE 16
  92
  93 typedef struct VncDisplay VncDisplay;
  94
  95 #ifdef CONFIG_VNC_TLS
  96 #include "vnc-tls.h"
  97 #include "vnc-auth-vencrypt.h"
  98 #endif
  99 #ifdef CONFIG_VNC_SASL
 100 #include "vnc-auth-sasl.h"
 101 #endif
 102
 103 struct VncRectStat
 104 {
 105     /* time of last 10 updates, to find update frequency */
 106     struct timeval times[10];
 107     int idx;
 108
 109     double freq;        /* Update frequency (in Hz) */
 110     bool updated;       /* Already updated during this refresh */
 111 };
 112
 113 typedef struct VncRectStat VncRectStat;
 114
 115 struct VncSurface
 116 {
 117     struct timeval last_freq_check;
 118     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_MAX_WIDTH / 16);
 119     VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
 120     DisplaySurface *ds;
 121 };
 122
 123 typedef enum VncShareMode {
 124     VNC_SHARE_MODE_CONNECTING = 1,
 125     VNC_SHARE_MODE_SHARED,
 126     VNC_SHARE_MODE_EXCLUSIVE,
 127     VNC_SHARE_MODE_DISCONNECTED,
 128 } VncShareMode;
 129
 130 typedef enum VncSharePolicy {
 131     VNC_SHARE_POLICY_IGNORE = 1,
 132     VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 133     VNC_SHARE_POLICY_FORCE_SHARED,
 134 } VncSharePolicy;
 135
 136 struct VncDisplay
 137 {
 138     QTAILQ_HEAD(, VncState) clients;
 139     int num_exclusive;
 140     VncSharePolicy share_policy;
 141     QEMUTimer *timer;
 142     int timer_interval;
 143     int lsock;
 144     DisplayState *ds;
 145     kbd_layout_t *kbd_layout;
 146     int lock_key_sync;
 147     QemuMutex mutex;
 148
 149     QEMUCursor *cursor;
 150     int cursor_msize;
 151     uint8_t *cursor_mask;
 152
 153     struct VncSurface guest;   /* guest visible surface (aka ds->surface) */
 154     DisplaySurface *server;  /* vnc server surface */
 155
 156     char *display;
 157     char *password;
 158     time_t expires;
 159     int auth;
 160     bool lossy;
 161     bool non_adaptive;
 162 #ifdef CONFIG_VNC_TLS
 163     int subauth; /* Used by VeNCrypt */
 164     VncDisplayTLS tls;
 165 #endif
 166 #ifdef CONFIG_VNC_SASL
 167     VncDisplaySASL sasl;
 168 #endif
 169 };
 170
 171 typedef struct VncTight {
 172     int type;
 173     uint8_t quality;
 174     uint8_t compression;
 175     uint8_t pixel24;
 176     Buffer tight;
 177     Buffer tmp;
 178     Buffer zlib;
 179     Buffer gradient;
 180 #ifdef CONFIG_VNC_JPEG
 181     Buffer jpeg;
 182 #endif
 183 #ifdef CONFIG_VNC_PNG
 184     Buffer png;
 185 #endif
 186     int levels[4];
 187     z_stream stream[4];
 188 } VncTight;
 189
 190 typedef struct VncHextile {
 191     VncSendHextileTile *send_tile;
 192 } VncHextile;
 193
 194 typedef struct VncZlib {
 195     Buffer zlib;
 196     Buffer tmp;
 197     z_stream stream;
 198     int level;
 199 } VncZlib;
 200
 201 typedef struct VncZrle {
 202     int type;
 203     Buffer fb;
 204     Buffer zrle;
 205     Buffer tmp;
 206     Buffer zlib;
 207     z_stream stream;
 208     VncPalette palette;
 209 } VncZrle;
 210
 211 typedef struct VncZywrle {
 212     int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 213 } VncZywrle;
 214
 215 struct VncRect
 216 {
 217     int x;
 218     int y;
 219     int w;
 220     int h;
 221 };
 222
 223 struct VncRectEntry
 224 {
 225     struct VncRect rect;
 226     QLIST_ENTRY(VncRectEntry) next;
 227 };
 228
 229 struct VncJob
 230 {
 231     VncState *vs;
 232
 233     QLIST_HEAD(, VncRectEntry) rectangles;
 234     QTAILQ_ENTRY(VncJob) next;
 235 };
 236
 237 struct VncState
 238 {
 239     int csock;
 240
 241     DisplayState *ds;
 242     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 243     uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 244                            * vnc-jobs-async.c */
 245
 246     VncDisplay *vd;
 247     int need_update;
 248     int force_update;
 249     uint32_t features;
 250     int absolute;
 251     int last_x;
 252     int last_y;
 253     int client_width;
 254     int client_height;
 255     VncShareMode share_mode;
 256
 257     uint32_t vnc_encoding;
 258
 259     int major;
 260     int minor;
 261
 262     int auth;
 263     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 264 #ifdef CONFIG_VNC_TLS
 265     int subauth; /* Used by VeNCrypt */
 266     VncStateTLS tls;
 267 #endif
 268 #ifdef CONFIG_VNC_SASL
 269     VncStateSASL sasl;
 270 #endif
 271
 272     QObject *info;
 273
 274     Buffer output;
 275     Buffer input;
 276     /* current output mode information */
 277     VncWritePixels *write_pixels;
 278     DisplaySurface clientds;
 279
 280     CaptureVoiceOut *audio_cap;
 281     struct audsettings as;
 282
 283     VncReadEvent *read_handler;
 284     size_t read_handler_expect;
 285     /* input */
 286     uint8_t modifiers_state[256];
 287     QEMUPutLEDEntry *led;
 288
 289     bool abort;
 290     QemuMutex output_mutex;
 291     QEMUBH *bh;
 292     Buffer jobs_buffer;
 293
 294     /* Encoding specific, if you add something here, don't forget to
 295      *  update vnc_async_encoding_start()
 296      */
 297     VncTight tight;
 298     VncZlib zlib;
 299     VncHextile hextile;
 300     VncZrle zrle;
 301     VncZywrle zywrle;
 302
 303     Notifier mouse_mode_notifier;
 304
 305     QTAILQ_ENTRY(VncState) next;
 306 };
 307
 308
 309 /*****************************************************************************
 310  *
 311  * Authentication modes
 312  *
 313  *****************************************************************************/
 314
 315 enum {
 316     VNC_AUTH_INVALID = 0,
 317     VNC_AUTH_NONE = 1,
 318     VNC_AUTH_VNC = 2,
 319     VNC_AUTH_RA2 = 5,
 320     VNC_AUTH_RA2NE = 6,
 321     VNC_AUTH_TIGHT = 16,
 322     VNC_AUTH_ULTRA = 17,
 323     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 324     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 325     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 326 };
 327
 328 enum {
 329     VNC_AUTH_VENCRYPT_PLAIN = 256,
 330     VNC_AUTH_VENCRYPT_TLSNONE = 257,
 331     VNC_AUTH_VENCRYPT_TLSVNC = 258,
 332     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 333     VNC_AUTH_VENCRYPT_X509NONE = 260,
 334     VNC_AUTH_VENCRYPT_X509VNC = 261,
 335     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 336     VNC_AUTH_VENCRYPT_X509SASL = 263,
 337     VNC_AUTH_VENCRYPT_TLSSASL = 264,
 338 };
 339
 340
 341 /*****************************************************************************
 342  *
 343  * Encoding types
 344  *
 345  *****************************************************************************/
 346
 347 #define VNC_ENCODING_RAW                  0x00000000
 348 #define VNC_ENCODING_COPYRECT             0x00000001
 349 #define VNC_ENCODING_RRE                  0x00000002
 350 #define VNC_ENCODING_CORRE                0x00000004
 351 #define VNC_ENCODING_HEXTILE              0x00000005
 352 #define VNC_ENCODING_ZLIB                 0x00000006
 353 #define VNC_ENCODING_TIGHT                0x00000007
 354 #define VNC_ENCODING_ZLIBHEX              0x00000008
 355 #define VNC_ENCODING_TRLE                 0x0000000f
 356 #define VNC_ENCODING_ZRLE                 0x00000010
 357 #define VNC_ENCODING_ZYWRLE               0x00000011
 358 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 359 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 360 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 361 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 362 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 363 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 364 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 365 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 366 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 367 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 368 #define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 369 #define VNC_ENCODING_WMVi                 0x574D5669
 370
 371 /*****************************************************************************
 372  *
 373  * Other tight constants
 374  *
 375  *****************************************************************************/
 376
 377 /*
 378  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 379  */
 380
 381 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 382 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 383 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 384 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 385 #define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 386 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 387 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 388 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 389
 390 /*****************************************************************************
 391  *
 392  * Features
 393  *
 394  *****************************************************************************/
 395
 396 #define VNC_FEATURE_RESIZE                   0
 397 #define VNC_FEATURE_HEXTILE                  1
 398 #define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 399 #define VNC_FEATURE_WMVI                     3
 400 #define VNC_FEATURE_TIGHT                    4
 401 #define VNC_FEATURE_ZLIB                     5
 402 #define VNC_FEATURE_COPYRECT                 6
 403 #define VNC_FEATURE_RICH_CURSOR              7
 404 #define VNC_FEATURE_TIGHT_PNG                8
 405 #define VNC_FEATURE_ZRLE                     9
 406 #define VNC_FEATURE_ZYWRLE                  10
 407
 408 #define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 409 #define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 410 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 411 #define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 412 #define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 413 #define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 414 #define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 415 #define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 416 #define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 417 #define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 418 #define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 419
 420
 421 /* Client -> Server message IDs */
 422 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 423 #define VNC_MSG_CLIENT_SET_ENCODINGS              2
 424 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 425 #define VNC_MSG_CLIENT_KEY_EVENT                  4
 426 #define VNC_MSG_CLIENT_POINTER_EVENT              5
 427 #define VNC_MSG_CLIENT_CUT_TEXT                   6
 428 #define VNC_MSG_CLIENT_VMWARE_0                   127
 429 #define VNC_MSG_CLIENT_CALL_CONTROL               249
 430 #define VNC_MSG_CLIENT_XVP                        250
 431 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 432 #define VNC_MSG_CLIENT_TIGHT                      252
 433 #define VNC_MSG_CLIENT_GII                        253
 434 #define VNC_MSG_CLIENT_VMWARE_1                   254
 435 #define VNC_MSG_CLIENT_QEMU                       255
 436
 437 /* Server -> Client message IDs */
 438 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 439 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 440 #define VNC_MSG_SERVER_BELL                       2
 441 #define VNC_MSG_SERVER_CUT_TEXT                   3
 442 #define VNC_MSG_SERVER_VMWARE_0                   127
 443 #define VNC_MSG_SERVER_CALL_CONTROL               249
 444 #define VNC_MSG_SERVER_XVP                        250
 445 #define VNC_MSG_SERVER_TIGHT                      252
 446 #define VNC_MSG_SERVER_GII                        253
 447 #define VNC_MSG_SERVER_VMWARE_1                   254
 448 #define VNC_MSG_SERVER_QEMU                       255
 449
 450
 451
 452 /* QEMU client -> server message IDs */
 453 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 454 #define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 455
 456 /* QEMU server -> client message IDs */
 457 #define VNC_MSG_SERVER_QEMU_AUDIO                 1
 458
 459
 460
 461 /* QEMU client -> server audio message IDs */
 462 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 463 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 464 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 465
 466 /* QEMU server -> client audio message IDs */
 467 #define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 468 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 469 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 470
 471
 472 /*****************************************************************************
 473  *
 474  * Internal APIs
 475  *
 476  *****************************************************************************/
 477
 478 /* Event loop functions */
 479 void vnc_client_read(void *opaque);
 480 void vnc_client_write(void *opaque);
 481
 482 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 483 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 484
 485 /* Protocol I/O functions */
 486 void vnc_write(VncState *vs, const void *data, size_t len);
 487 void vnc_write_u32(VncState *vs, uint32_t value);
 488 void vnc_write_s32(VncState *vs, int32_t value);
 489 void vnc_write_u16(VncState *vs, uint16_t value);
 490 void vnc_write_u8(VncState *vs, uint8_t value);
 491 void vnc_flush(VncState *vs);
 492 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 493
 494
 495 /* Buffer I/O functions */
 496 uint8_t read_u8(uint8_t *data, size_t offset);
 497 uint16_t read_u16(uint8_t *data, size_t offset);
 498 int32_t read_s32(uint8_t *data, size_t offset);
 499 uint32_t read_u32(uint8_t *data, size_t offset);
 500
 501 /* Protocol stage functions */
 502 void vnc_client_error(VncState *vs);
 503 int vnc_client_io_error(VncState *vs, int ret, int last_errno);
 504
 505 void start_client_init(VncState *vs);
 506 void start_auth_vnc(VncState *vs);
 507
 508 /* Buffer management */
 509 void buffer_reserve(Buffer *buffer, size_t len);
 510 int buffer_empty(Buffer *buffer);
 511 uint8_t *buffer_end(Buffer *buffer);
 512 void buffer_reset(Buffer *buffer);
 513 void buffer_free(Buffer *buffer);
 514 void buffer_append(Buffer *buffer, const void *data, size_t len);
 515
 516
 517 /* Misc helpers */
 518
 519 char *vnc_socket_local_addr(const char *format, int fd);
 520 char *vnc_socket_remote_addr(const char *format, int fd);
 521
 522 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 523     return (vs->features & (1 << feature));
 524 }
 525
 526 /* Framebuffer */
 527 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 528                             int32_t encoding);
 529
 530 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 531 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 532 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 533
 534 /* Encodings */
 535 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 536
 537 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 538
 539 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 540                                          int y, int w, int h);
 541 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 542
 543 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 544 void vnc_zlib_zfree(void *x, void *addr);
 545 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 546 void vnc_zlib_clear(VncState *vs);
 547
 548 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 549 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 550                                           int w, int h);
 551 void vnc_tight_clear(VncState *vs);
 552
 553 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 554 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 555 void vnc_zrle_clear(VncState *vs);
 556
 557 #endif /* __QEMU_VNC_H */