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 int auth; 260 char challenge[VNC_AUTH_CHALLENGE_SIZE]; 261 #ifdef CONFIG_VNC_TLS 262 int subauth; /* Used by VeNCrypt */ 263 VncStateTLS tls; 264 #endif 265 #ifdef CONFIG_VNC_SASL 266 VncStateSASL sasl; 267 #endif 268 269 QObject *info; 270 271 Buffer output; 272 Buffer input; 273 /* current output mode information */ 274 VncWritePixels *write_pixels; 275 DisplaySurface clientds; 276 277 CaptureVoiceOut *audio_cap; 278 struct audsettings as; 279 280 VncReadEvent *read_handler; 281 size_t read_handler_expect; 282 /* input */ 283 uint8_t modifiers_state[256]; 284 QEMUPutLEDEntry *led; 285 286 bool abort; 287 #ifndef CONFIG_VNC_THREAD 288 VncJob job; 289 #else 290 QemuMutex output_mutex; 291 #endif 292 293 /* Encoding specific, if you add something here, don't forget to 294 * update vnc_async_encoding_start() 295 */ 296 VncTight tight; 297 VncZlib zlib; 298 VncHextile hextile; 299 VncZrle zrle; 300 VncZywrle zywrle; 301 302 Notifier mouse_mode_notifier; 303 304 QTAILQ_ENTRY(VncState) next; 305 }; 306 307 308 /***************************************************************************** 309 * 310 * Authentication modes 311 * 312 *****************************************************************************/ 313 314 enum { 315 VNC_AUTH_INVALID = 0, 316 VNC_AUTH_NONE = 1, 317 VNC_AUTH_VNC = 2, 318 VNC_AUTH_RA2 = 5, 319 VNC_AUTH_RA2NE = 6, 320 VNC_AUTH_TIGHT = 16, 321 VNC_AUTH_ULTRA = 17, 322 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */ 323 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */ 324 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */ 325 }; 326 327 enum { 328 VNC_AUTH_VENCRYPT_PLAIN = 256, 329 VNC_AUTH_VENCRYPT_TLSNONE = 257, 330 VNC_AUTH_VENCRYPT_TLSVNC = 258, 331 VNC_AUTH_VENCRYPT_TLSPLAIN = 259, 332 VNC_AUTH_VENCRYPT_X509NONE = 260, 333 VNC_AUTH_VENCRYPT_X509VNC = 261, 334 VNC_AUTH_VENCRYPT_X509PLAIN = 262, 335 VNC_AUTH_VENCRYPT_X509SASL = 263, 336 VNC_AUTH_VENCRYPT_TLSSASL = 264, 337 }; 338 339 340 /***************************************************************************** 341 * 342 * Encoding types 343 * 344 *****************************************************************************/ 345 346 #define VNC_ENCODING_RAW 0x00000000 347 #define VNC_ENCODING_COPYRECT 0x00000001 348 #define VNC_ENCODING_RRE 0x00000002 349 #define VNC_ENCODING_CORRE 0x00000004 350 #define VNC_ENCODING_HEXTILE 0x00000005 351 #define VNC_ENCODING_ZLIB 0x00000006 352 #define VNC_ENCODING_TIGHT 0x00000007 353 #define VNC_ENCODING_ZLIBHEX 0x00000008 354 #define VNC_ENCODING_TRLE 0x0000000f 355 #define VNC_ENCODING_ZRLE 0x00000010 356 #define VNC_ENCODING_ZYWRLE 0x00000011 357 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ 358 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ 359 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ 360 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */ 361 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */ 362 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */ 363 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */ 364 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */ 365 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */ 366 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */ 367 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */ 368 #define VNC_ENCODING_WMVi 0x574D5669 369 370 /***************************************************************************** 371 * 372 * Other tight constants 373 * 374 *****************************************************************************/ 375 376 /* 377 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC. 378 */ 379 380 #define VNC_TIGHT_CCB_RESET_MASK (0x0f) 381 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4) 382 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4) 383 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4) 384 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4) 385 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4) 386 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4) 387 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4) 388 389 /***************************************************************************** 390 * 391 * Features 392 * 393 *****************************************************************************/ 394 395 #define VNC_FEATURE_RESIZE 0 396 #define VNC_FEATURE_HEXTILE 1 397 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2 398 #define VNC_FEATURE_WMVI 3 399 #define VNC_FEATURE_TIGHT 4 400 #define VNC_FEATURE_ZLIB 5 401 #define VNC_FEATURE_COPYRECT 6 402 #define VNC_FEATURE_RICH_CURSOR 7 403 #define VNC_FEATURE_TIGHT_PNG 8 404 #define VNC_FEATURE_ZRLE 9 405 #define VNC_FEATURE_ZYWRLE 10 406 407 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE) 408 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE) 409 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE) 410 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI) 411 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT) 412 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB) 413 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT) 414 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR) 415 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG) 416 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE) 417 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE) 418 419 420 /* Client -> Server message IDs */ 421 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0 422 #define VNC_MSG_CLIENT_SET_ENCODINGS 2 423 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3 424 #define VNC_MSG_CLIENT_KEY_EVENT 4 425 #define VNC_MSG_CLIENT_POINTER_EVENT 5 426 #define VNC_MSG_CLIENT_CUT_TEXT 6 427 #define VNC_MSG_CLIENT_VMWARE_0 127 428 #define VNC_MSG_CLIENT_CALL_CONTROL 249 429 #define VNC_MSG_CLIENT_XVP 250 430 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251 431 #define VNC_MSG_CLIENT_TIGHT 252 432 #define VNC_MSG_CLIENT_GII 253 433 #define VNC_MSG_CLIENT_VMWARE_1 254 434 #define VNC_MSG_CLIENT_QEMU 255 435 436 /* Server -> Client message IDs */ 437 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0 438 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1 439 #define VNC_MSG_SERVER_BELL 2 440 #define VNC_MSG_SERVER_CUT_TEXT 3 441 #define VNC_MSG_SERVER_VMWARE_0 127 442 #define VNC_MSG_SERVER_CALL_CONTROL 249 443 #define VNC_MSG_SERVER_XVP 250 444 #define VNC_MSG_SERVER_TIGHT 252 445 #define VNC_MSG_SERVER_GII 253 446 #define VNC_MSG_SERVER_VMWARE_1 254 447 #define VNC_MSG_SERVER_QEMU 255 448 449 450 451 /* QEMU client -> server message IDs */ 452 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0 453 #define VNC_MSG_CLIENT_QEMU_AUDIO 1 454 455 /* QEMU server -> client message IDs */ 456 #define VNC_MSG_SERVER_QEMU_AUDIO 1 457 458 459 460 /* QEMU client -> server audio message IDs */ 461 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0 462 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1 463 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2 464 465 /* QEMU server -> client audio message IDs */ 466 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0 467 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1 468 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2 469 470 471 /***************************************************************************** 472 * 473 * Internal APIs 474 * 475 *****************************************************************************/ 476 477 /* Event loop functions */ 478 void vnc_client_read(void *opaque); 479 void vnc_client_write(void *opaque); 480 481 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen); 482 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen); 483 484 /* Protocol I/O functions */ 485 void vnc_write(VncState *vs, const void *data, size_t len); 486 void vnc_write_u32(VncState *vs, uint32_t value); 487 void vnc_write_s32(VncState *vs, int32_t value); 488 void vnc_write_u16(VncState *vs, uint16_t value); 489 void vnc_write_u8(VncState *vs, uint8_t value); 490 void vnc_flush(VncState *vs); 491 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting); 492 493 494 /* Buffer I/O functions */ 495 uint8_t read_u8(uint8_t *data, size_t offset); 496 uint16_t read_u16(uint8_t *data, size_t offset); 497 int32_t read_s32(uint8_t *data, size_t offset); 498 uint32_t read_u32(uint8_t *data, size_t offset); 499 500 /* Protocol stage functions */ 501 void vnc_client_error(VncState *vs); 502 int vnc_client_io_error(VncState *vs, int ret, int last_errno); 503 504 void start_client_init(VncState *vs); 505 void start_auth_vnc(VncState *vs); 506 507 /* Buffer management */ 508 void buffer_reserve(Buffer *buffer, size_t len); 509 int buffer_empty(Buffer *buffer); 510 uint8_t *buffer_end(Buffer *buffer); 511 void buffer_reset(Buffer *buffer); 512 void buffer_free(Buffer *buffer); 513 void buffer_append(Buffer *buffer, const void *data, size_t len); 514 515 516 /* Misc helpers */ 517 518 char *vnc_socket_local_addr(const char *format, int fd); 519 char *vnc_socket_remote_addr(const char *format, int fd); 520 521 static inline uint32_t vnc_has_feature(VncState *vs, int feature) { 522 return (vs->features & (1 << feature)); 523 } 524 525 /* Framebuffer */ 526 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 527 int32_t encoding); 528 529 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v); 530 double vnc_update_freq(VncState *vs, int x, int y, int w, int h); 531 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h); 532 533 /* Encodings */ 534 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 535 536 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 537 538 int vnc_hextile_send_framebuffer_update(VncState *vs, int x, 539 int y, int w, int h); 540 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic); 541 542 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size); 543 void vnc_zlib_zfree(void *x, void *addr); 544 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 545 void vnc_zlib_clear(VncState *vs); 546 547 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 548 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, 549 int w, int h); 550 void vnc_tight_clear(VncState *vs); 551 552 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 553 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 554 void vnc_zrle_clear(VncState *vs); 555 556 #endif /* __QEMU_VNC_H */ 557