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/queue.h"
  31 #include "qemu/thread.h"
  32 #include "ui/clipboard.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 "io/net-listener.h"
  41 #include "authz/base.h"
  42 #include <zlib.h>
  43
  44 #include "keymaps.h"
  45 #include "vnc-palette.h"
  46 #include "vnc-enc-zrle.h"
  47 #include "ui/kbd-state.h"
  48
  49 // #define _VNC_DEBUG 1
  50
  51 #ifdef _VNC_DEBUG
  52 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  53 #else
  54 #define VNC_DEBUG(fmt, ...) do { } while (0)
  55 #endif
  56
  57 /*****************************************************************************
  58  *
  59  * Core data structures
  60  *
  61  *****************************************************************************/
  62
  63 typedef struct VncState VncState;
  64 typedef struct VncJob VncJob;
  65 typedef struct VncRect VncRect;
  66 typedef struct VncRectEntry VncRectEntry;
  67
  68 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  69
  70 typedef void VncWritePixels(VncState *vs, void *data, int size);
  71
  72 typedef void VncSendHextileTile(VncState *vs,
  73                                 int x, int y, int w, int h,
  74                                 void *last_bg,
  75                                 void *last_fg,
  76                                 int *has_bg, int *has_fg);
  77
  78 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented
  79  * by one bit in the dirty bitmap, should be a power of 2 */
  80 #define VNC_DIRTY_PIXELS_PER_BIT 16
  81
  82 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */
  83
  84 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT)
  85 #define VNC_MAX_HEIGHT 2048
  86
  87 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
  88 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT)
  89
  90 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than
  91  * VNC_DIRTY_BITS due to alignment */
  92 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE)
  93
  94 #define VNC_STAT_RECT  64
  95 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
  96 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
  97
  98 #define VNC_AUTH_CHALLENGE_SIZE 16
  99
 100 typedef struct VncDisplay VncDisplay;
 101
 102 #include "vnc-auth-vencrypt.h"
 103 #ifdef CONFIG_VNC_SASL
 104 #include "vnc-auth-sasl.h"
 105 #endif
 106 #include "vnc-ws.h"
 107
 108 struct VncRectStat
 109 {
 110     /* time of last 10 updates, to find update frequency */
 111     struct timeval times[10];
 112     int idx;
 113
 114     double freq;        /* Update frequency (in Hz) */
 115     bool updated;       /* Already updated during this refresh */
 116 };
 117
 118 typedef struct VncRectStat VncRectStat;
 119
 120 struct VncSurface
 121 {
 122     struct timeval last_freq_check;
 123     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
 124                    VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT);
 125     VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
 126     pixman_image_t *fb;
 127     pixman_format_code_t format;
 128 };
 129
 130 typedef enum VncShareMode {
 131     VNC_SHARE_MODE_CONNECTING = 1,
 132     VNC_SHARE_MODE_SHARED,
 133     VNC_SHARE_MODE_EXCLUSIVE,
 134     VNC_SHARE_MODE_DISCONNECTED,
 135 } VncShareMode;
 136
 137 typedef enum VncSharePolicy {
 138     VNC_SHARE_POLICY_IGNORE = 1,
 139     VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 140     VNC_SHARE_POLICY_FORCE_SHARED,
 141 } VncSharePolicy;
 142
 143 struct VncDisplay
 144 {
 145     QTAILQ_HEAD(, VncState) clients;
 146     int num_connecting;
 147     int num_shared;
 148     int num_exclusive;
 149     int connections_limit;
 150     VncSharePolicy share_policy;
 151     QIONetListener *listener;
 152     QIONetListener *wslistener;
 153     DisplaySurface *ds;
 154     DisplayChangeListener dcl;
 155     kbd_layout_t *kbd_layout;
 156     int lock_key_sync;
 157     QEMUPutLEDEntry *led;
 158     int ledstate;
 159     QKbdState *kbd;
 160     QemuMutex mutex;
 161
 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     int true_width; /* server surface width before rounding up */
 168
 169     const char *id;
 170     QTAILQ_ENTRY(VncDisplay) next;
 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     int ws_subauth; /* Used by websockets */
 178     bool lossy;
 179     bool non_adaptive;
 180     bool power_control;
 181     QCryptoTLSCreds *tlscreds;
 182     QAuthZ *tlsauthz;
 183     char *tlsauthzid;
 184 #ifdef CONFIG_VNC_SASL
 185     VncDisplaySASL sasl;
 186 #endif
 187
 188     AudioState *audio_state;
 189 };
 190
 191 typedef struct VncTight {
 192     int type;
 193     uint8_t quality;
 194     uint8_t compression;
 195     uint8_t pixel24;
 196     Buffer tight;
 197     Buffer tmp;
 198     Buffer zlib;
 199     Buffer gradient;
 200 #ifdef CONFIG_VNC_JPEG
 201     Buffer jpeg;
 202 #endif
 203 #ifdef CONFIG_PNG
 204     Buffer png;
 205 #endif
 206     int levels[4];
 207     z_stream stream[4];
 208 } VncTight;
 209
 210 typedef struct VncHextile {
 211     VncSendHextileTile *send_tile;
 212 } VncHextile;
 213
 214 typedef struct VncZlib {
 215     Buffer zlib;
 216     Buffer tmp;
 217     z_stream stream;
 218     int level;
 219 } VncZlib;
 220
 221 typedef struct VncZrle {
 222     int type;
 223     Buffer fb;
 224     Buffer zrle;
 225     Buffer tmp;
 226     Buffer zlib;
 227     z_stream stream;
 228     VncPalette palette;
 229 } VncZrle;
 230
 231 typedef struct VncZywrle {
 232     int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 233 } VncZywrle;
 234
 235 struct VncRect
 236 {
 237     int x;
 238     int y;
 239     int w;
 240     int h;
 241 };
 242
 243 struct VncRectEntry
 244 {
 245     struct VncRect rect;
 246     QLIST_ENTRY(VncRectEntry) next;
 247 };
 248
 249 struct VncJob
 250 {
 251     VncState *vs;
 252
 253     QLIST_HEAD(, VncRectEntry) rectangles;
 254     QTAILQ_ENTRY(VncJob) next;
 255 };
 256
 257 typedef enum {
 258     VNC_STATE_UPDATE_NONE,
 259     VNC_STATE_UPDATE_INCREMENTAL,
 260     VNC_STATE_UPDATE_FORCE,
 261 } VncStateUpdate;
 262
 263 #define VNC_MAGIC ((uint64_t)0x05b3f069b3d204bb)
 264
 265 struct VncState
 266 {
 267     uint64_t magic;
 268     QIOChannelSocket *sioc; /* The underlying socket */
 269     QIOChannel *ioc; /* The channel currently used for I/O */
 270     guint ioc_tag;
 271     gboolean disconnecting;
 272
 273     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 274     uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 275                            * vnc-jobs-async.c */
 276
 277     VncDisplay *vd;
 278     VncStateUpdate update; /* Most recent pending request from client */
 279     VncStateUpdate job_update; /* Currently processed by job thread */
 280     int has_dirty;
 281     uint32_t features;
 282     int absolute;
 283     int last_x;
 284     int last_y;
 285     uint32_t last_bmask;
 286     size_t client_width; /* limited to u16 by RFB proto */
 287     size_t client_height; /* limited to u16 by RFB proto */
 288     VncShareMode share_mode;
 289
 290     uint32_t vnc_encoding;
 291
 292     int major;
 293     int minor;
 294
 295     int auth;
 296     int subauth; /* Used by VeNCrypt */
 297     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 298     QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
 299 #ifdef CONFIG_VNC_SASL
 300     VncStateSASL sasl;
 301 #endif
 302     bool encode_ws;
 303     bool websocket;
 304
 305 #ifdef CONFIG_VNC
 306     VncClientInfo *info;
 307 #endif
 308
 309     /* Job thread bottom half has put data for a forced update
 310      * into the output buffer. This offset points to the end of
 311      * the update data in the output buffer. This lets us determine
 312      * when a force update is fully sent to the client, allowing
 313      * us to process further forced updates. */
 314     size_t force_update_offset;
 315     /* We allow multiple incremental updates or audio capture
 316      * samples to be queued in output buffer, provided the
 317      * buffer size doesn't exceed this threshold. The value
 318      * is calculating dynamically based on framebuffer size
 319      * and audio sample settings in vnc_update_throttle_offset() */
 320     size_t throttle_output_offset;
 321     Buffer output;
 322     Buffer input;
 323     /* current output mode information */
 324     VncWritePixels *write_pixels;
 325     PixelFormat client_pf;
 326     pixman_format_code_t client_format;
 327     bool client_be;
 328
 329     CaptureVoiceOut *audio_cap;
 330     struct audsettings as;
 331
 332     VncReadEvent *read_handler;
 333     size_t read_handler_expect;
 334
 335     bool abort;
 336     QemuMutex output_mutex;
 337     QEMUBH *bh;
 338     Buffer jobs_buffer;
 339
 340     /* Encoding specific, if you add something here, don't forget to
 341      *  update vnc_async_encoding_start()
 342      */
 343     VncTight *tight;
 344     VncZlib zlib;
 345     VncHextile hextile;
 346     VncZrle *zrle;
 347     VncZywrle zywrle;
 348
 349     Notifier mouse_mode_notifier;
 350
 351     QemuClipboardPeer cbpeer;
 352     QemuClipboardInfo *cbinfo;
 353     uint32_t cbpending;
 354
 355     QTAILQ_ENTRY(VncState) next;
 356 };
 357
 358
 359 /*****************************************************************************
 360  *
 361  * Authentication modes
 362  *
 363  *****************************************************************************/
 364
 365 enum {
 366     VNC_AUTH_INVALID = 0,
 367     VNC_AUTH_NONE = 1,
 368     VNC_AUTH_VNC = 2,
 369     VNC_AUTH_RA2 = 5,
 370     VNC_AUTH_RA2NE = 6,
 371     VNC_AUTH_TIGHT = 16,
 372     VNC_AUTH_ULTRA = 17,
 373     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 374     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 375     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 376 };
 377
 378 enum {
 379     VNC_AUTH_VENCRYPT_PLAIN = 256,
 380     VNC_AUTH_VENCRYPT_TLSNONE = 257,
 381     VNC_AUTH_VENCRYPT_TLSVNC = 258,
 382     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 383     VNC_AUTH_VENCRYPT_X509NONE = 260,
 384     VNC_AUTH_VENCRYPT_X509VNC = 261,
 385     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 386     VNC_AUTH_VENCRYPT_X509SASL = 263,
 387     VNC_AUTH_VENCRYPT_TLSSASL = 264,
 388 };
 389
 390
 391 /*****************************************************************************
 392  *
 393  * Encoding types
 394  *
 395  *****************************************************************************/
 396
 397 #define VNC_ENCODING_RAW                  0x00000000
 398 #define VNC_ENCODING_COPYRECT             0x00000001
 399 #define VNC_ENCODING_RRE                  0x00000002
 400 #define VNC_ENCODING_CORRE                0x00000004
 401 #define VNC_ENCODING_HEXTILE              0x00000005
 402 #define VNC_ENCODING_ZLIB                 0x00000006
 403 #define VNC_ENCODING_TIGHT                0x00000007
 404 #define VNC_ENCODING_ZLIBHEX              0x00000008
 405 #define VNC_ENCODING_TRLE                 0x0000000f
 406 #define VNC_ENCODING_ZRLE                 0x00000010
 407 #define VNC_ENCODING_ZYWRLE               0x00000011
 408 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 409 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 410 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 411 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 412 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 413 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 414 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 415 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 416 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 417 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 418 #define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 419 #define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 420 #define VNC_ENCODING_DESKTOP_RESIZE_EXT   0XFFFFFECC /* -308 */
 421 #define VNC_ENCODING_XVP                  0XFFFFFECB /* -309 */
 422 #define VNC_ENCODING_ALPHA_CURSOR         0XFFFFFEC6 /* -314 */
 423 #define VNC_ENCODING_WMVi                 0x574D5669
 424 #define VNC_ENCODING_CLIPBOARD_EXT        0xc0a1e5ce
 425
 426 /*****************************************************************************
 427  *
 428  * Other tight constants
 429  *
 430  *****************************************************************************/
 431
 432 /*
 433  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 434  */
 435
 436 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 437 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 438 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 439 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 440 #define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 441 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 442 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 443 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 444
 445 /*****************************************************************************
 446  *
 447  * Features
 448  *
 449  *****************************************************************************/
 450
 451 enum VncFeatures {
 452     VNC_FEATURE_RESIZE,
 453     VNC_FEATURE_RESIZE_EXT,
 454     VNC_FEATURE_HEXTILE,
 455     VNC_FEATURE_POINTER_TYPE_CHANGE,
 456     VNC_FEATURE_WMVI,
 457     VNC_FEATURE_TIGHT,
 458     VNC_FEATURE_ZLIB,
 459     VNC_FEATURE_RICH_CURSOR,
 460     VNC_FEATURE_ALPHA_CURSOR,
 461     VNC_FEATURE_TIGHT_PNG,
 462     VNC_FEATURE_ZRLE,
 463     VNC_FEATURE_ZYWRLE,
 464     VNC_FEATURE_LED_STATE,
 465     VNC_FEATURE_XVP,
 466     VNC_FEATURE_CLIPBOARD_EXT,
 467     VNC_FEATURE_AUDIO,
 468 };
 469
 470
 471 /* Client -> Server message IDs */
 472 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 473 #define VNC_MSG_CLIENT_SET_ENCODINGS              2
 474 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 475 #define VNC_MSG_CLIENT_KEY_EVENT                  4
 476 #define VNC_MSG_CLIENT_POINTER_EVENT              5
 477 #define VNC_MSG_CLIENT_CUT_TEXT                   6
 478 #define VNC_MSG_CLIENT_VMWARE_0                   127
 479 #define VNC_MSG_CLIENT_CALL_CONTROL               249
 480 #define VNC_MSG_CLIENT_XVP                        250
 481 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 482 #define VNC_MSG_CLIENT_TIGHT                      252
 483 #define VNC_MSG_CLIENT_GII                        253
 484 #define VNC_MSG_CLIENT_VMWARE_1                   254
 485 #define VNC_MSG_CLIENT_QEMU                       255
 486
 487 /* Server -> Client message IDs */
 488 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 489 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 490 #define VNC_MSG_SERVER_BELL                       2
 491 #define VNC_MSG_SERVER_CUT_TEXT                   3
 492 #define VNC_MSG_SERVER_VMWARE_0                   127
 493 #define VNC_MSG_SERVER_CALL_CONTROL               249
 494 #define VNC_MSG_SERVER_XVP                        250
 495 #define VNC_MSG_SERVER_TIGHT                      252
 496 #define VNC_MSG_SERVER_GII                        253
 497 #define VNC_MSG_SERVER_VMWARE_1                   254
 498 #define VNC_MSG_SERVER_QEMU                       255
 499
 500
 501
 502 /* QEMU client -> server message IDs */
 503 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 504 #define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 505
 506 /* QEMU server -> client message IDs */
 507 #define VNC_MSG_SERVER_QEMU_AUDIO                 1
 508
 509
 510
 511 /* QEMU client -> server audio message IDs */
 512 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 513 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 514 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 515
 516 /* QEMU server -> client audio message IDs */
 517 #define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 518 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 519 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 520
 521 /* XVP server -> client status code */
 522 #define VNC_XVP_CODE_FAIL 0
 523 #define VNC_XVP_CODE_INIT 1
 524
 525 /* XVP client -> server action request  */
 526 #define VNC_XVP_ACTION_SHUTDOWN 2
 527 #define VNC_XVP_ACTION_REBOOT 3
 528 #define VNC_XVP_ACTION_RESET 4
 529
 530 /* extended clipboard flags  */
 531 #define VNC_CLIPBOARD_TEXT     (1 << 0)
 532 #define VNC_CLIPBOARD_RTF      (1 << 1)
 533 #define VNC_CLIPBOARD_HTML     (1 << 2)
 534 #define VNC_CLIPBOARD_DIB      (1 << 3)
 535 #define VNC_CLIPBOARD_FILES    (1 << 4)
 536 #define VNC_CLIPBOARD_CAPS     (1 << 24)
 537 #define VNC_CLIPBOARD_REQUEST  (1 << 25)
 538 #define VNC_CLIPBOARD_PEEK     (1 << 26)
 539 #define VNC_CLIPBOARD_NOTIFY   (1 << 27)
 540 #define VNC_CLIPBOARD_PROVIDE  (1 << 28)
 541
 542 /*****************************************************************************
 543  *
 544  * Internal APIs
 545  *
 546  *****************************************************************************/
 547
 548 /* Event loop functions */
 549 gboolean vnc_client_io(QIOChannel *ioc,
 550                        GIOCondition condition,
 551                        void *opaque);
 552
 553 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 554 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 555
 556 /* Protocol I/O functions */
 557 void vnc_write(VncState *vs, const void *data, size_t len);
 558 void vnc_write_u32(VncState *vs, uint32_t value);
 559 void vnc_write_s32(VncState *vs, int32_t value);
 560 void vnc_write_u16(VncState *vs, uint16_t value);
 561 void vnc_write_u8(VncState *vs, uint8_t value);
 562 void vnc_flush(VncState *vs);
 563 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 564 void vnc_disconnect_finish(VncState *vs);
 565 void vnc_start_protocol(VncState *vs);
 566
 567
 568 /* Buffer I/O functions */
 569 uint32_t read_u32(uint8_t *data, size_t offset);
 570
 571 /* Protocol stage functions */
 572 void vnc_client_error(VncState *vs);
 573 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error *err);
 574
 575 void start_client_init(VncState *vs);
 576 void start_auth_vnc(VncState *vs);
 577
 578
 579 /* Misc helpers */
 580
 581 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 582     return (vs->features & (1 << feature));
 583 }
 584
 585 static inline void vnc_set_feature(VncState *vs, enum VncFeatures feature)
 586 {
 587     vs->features |= (1 << feature);
 588 }
 589
 590 /* Framebuffer */
 591 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 592                             int32_t encoding);
 593
 594 /* server fb is in PIXMAN_x8r8g8b8 */
 595 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
 596 #define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
 597 #define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
 598
 599 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 600 int vnc_server_fb_stride(VncDisplay *vd);
 601
 602 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 603 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 604 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 605
 606 /* Encodings */
 607 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 608
 609 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 610
 611 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 612                                          int y, int w, int h);
 613 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 614
 615 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 616 void vnc_zlib_zfree(void *x, void *addr);
 617 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 618 void vnc_zlib_clear(VncState *vs);
 619
 620 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 621 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 622                                           int w, int h);
 623 void vnc_tight_clear(VncState *vs);
 624
 625 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 626 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 627 void vnc_zrle_clear(VncState *vs);
 628
 629 /* vnc-clipboard.c */
 630 void vnc_server_cut_text_caps(VncState *vs);
 631 void vnc_client_cut_text(VncState *vs, size_t len, uint8_t *text);
 632 void vnc_client_cut_text_ext(VncState *vs, int32_t len, uint32_t flags, uint8_t *data);
 633
 634 #endif /* QEMU_VNC_H */