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 "console.h"
  32 #include "monitor.h"
  33 #include "audio/audio.h"
  34 #include <zlib.h>
  35
  36 #include "keymaps.h"
  37
  38 // #define _VNC_DEBUG 1
  39
  40 #ifdef _VNC_DEBUG
  41 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  42 #else
  43 #define VNC_DEBUG(fmt, ...) do { } while (0)
  44 #endif
  45
  46 /*****************************************************************************
  47  *
  48  * Core data structures
  49  *
  50  *****************************************************************************/
  51
  52 typedef struct Buffer
  53 {
  54     size_t capacity;
  55     size_t offset;
  56     uint8_t *buffer;
  57 } Buffer;
  58
  59 typedef struct VncState VncState;
  60
  61 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  62
  63 typedef void VncWritePixels(VncState *vs, void *data, int size);
  64
  65 typedef void VncSendHextileTile(VncState *vs,
  66                                 int x, int y, int w, int h,
  67                                 void *last_bg,
  68                                 void *last_fg,
  69                                 int *has_bg, int *has_fg);
  70
  71 #define VNC_MAX_WIDTH 2048
  72 #define VNC_MAX_HEIGHT 2048
  73 #define VNC_DIRTY_WORDS (VNC_MAX_WIDTH / (16 * 32))
  74
  75 #define VNC_AUTH_CHALLENGE_SIZE 16
  76
  77 typedef struct VncDisplay VncDisplay;
  78
  79 #ifdef CONFIG_VNC_TLS
  80 #include "vnc-tls.h"
  81 #include "vnc-auth-vencrypt.h"
  82 #endif
  83 #ifdef CONFIG_VNC_SASL
  84 #include "vnc-auth-sasl.h"
  85 #endif
  86
  87
  88 struct VncDisplay
  89 {
  90     int lsock;
  91     DisplayState *ds;
  92     VncState *clients;
  93     kbd_layout_t *kbd_layout;
  94
  95     char *display;
  96     char *password;
  97     int auth;
  98 #ifdef CONFIG_VNC_TLS
  99     int subauth; /* Used by VeNCrypt */
 100     VncDisplayTLS tls;
 101 #endif
 102 #ifdef CONFIG_VNC_SASL
 103     VncDisplaySASL sasl;
 104 #endif
 105 };
 106
 107 struct VncSurface
 108 {
 109     uint32_t dirty[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS];
 110     DisplaySurface *ds;
 111 };
 112
 113 struct VncState
 114 {
 115     QEMUTimer *timer;
 116     int csock;
 117
 118     DisplayState *ds;
 119     struct VncSurface guest;   /* guest visible surface (aka ds->surface) */
 120     struct VncSurface server;  /* vnc server surface */
 121
 122     VncDisplay *vd;
 123     int need_update;
 124     int force_update;
 125     uint32_t features;
 126     int absolute;
 127     int last_x;
 128     int last_y;
 129
 130     uint32_t vnc_encoding;
 131     uint8_t tight_quality;
 132     uint8_t tight_compression;
 133
 134     int major;
 135     int minor;
 136
 137     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 138 #ifdef CONFIG_VNC_TLS
 139     VncStateTLS tls;
 140 #endif
 141 #ifdef CONFIG_VNC_SASL
 142     VncStateSASL sasl;
 143 #endif
 144
 145     Buffer output;
 146     Buffer input;
 147     /* current output mode information */
 148     VncWritePixels *write_pixels;
 149     VncSendHextileTile *send_hextile_tile;
 150     DisplaySurface clientds;
 151
 152     CaptureVoiceOut *audio_cap;
 153     struct audsettings as;
 154
 155     VncReadEvent *read_handler;
 156     size_t read_handler_expect;
 157     /* input */
 158     uint8_t modifiers_state[256];
 159
 160     Buffer zlib;
 161     Buffer zlib_tmp;
 162     z_stream zlib_stream[4];
 163
 164     VncState *next;
 165 };
 166
 167
 168 /*****************************************************************************
 169  *
 170  * Authentication modes
 171  *
 172  *****************************************************************************/
 173
 174 enum {
 175     VNC_AUTH_INVALID = 0,
 176     VNC_AUTH_NONE = 1,
 177     VNC_AUTH_VNC = 2,
 178     VNC_AUTH_RA2 = 5,
 179     VNC_AUTH_RA2NE = 6,
 180     VNC_AUTH_TIGHT = 16,
 181     VNC_AUTH_ULTRA = 17,
 182     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 183     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 184     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 185 };
 186
 187 enum {
 188     VNC_AUTH_VENCRYPT_PLAIN = 256,
 189     VNC_AUTH_VENCRYPT_TLSNONE = 257,
 190     VNC_AUTH_VENCRYPT_TLSVNC = 258,
 191     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 192     VNC_AUTH_VENCRYPT_X509NONE = 260,
 193     VNC_AUTH_VENCRYPT_X509VNC = 261,
 194     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 195     VNC_AUTH_VENCRYPT_X509SASL = 263,
 196     VNC_AUTH_VENCRYPT_TLSSASL = 264,
 197 };
 198
 199
 200 /*****************************************************************************
 201  *
 202  * Encoding types
 203  *
 204  *****************************************************************************/
 205
 206 #define VNC_ENCODING_RAW                  0x00000000
 207 #define VNC_ENCODING_COPYRECT             0x00000001
 208 #define VNC_ENCODING_RRE                  0x00000002
 209 #define VNC_ENCODING_CORRE                0x00000004
 210 #define VNC_ENCODING_HEXTILE              0x00000005
 211 #define VNC_ENCODING_ZLIB                 0x00000006
 212 #define VNC_ENCODING_TIGHT                0x00000007
 213 #define VNC_ENCODING_ZLIBHEX              0x00000008
 214 #define VNC_ENCODING_TRLE                 0x0000000f
 215 #define VNC_ENCODING_ZRLE                 0x00000010
 216 #define VNC_ENCODING_ZYWRLE               0x00000011
 217 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 218 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 219 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 220 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 221 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 222 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 223 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 224 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 225 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 226 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 227 #define VNC_ENCODING_WMVi                 0x574D5669
 228
 229 /*****************************************************************************
 230  *
 231  * Other tight constants
 232  *
 233  *****************************************************************************/
 234
 235 /*
 236  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 237  */
 238
 239 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 240 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 241 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 242 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 243 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 244 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 245 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 246
 247 /*****************************************************************************
 248  *
 249  * Features
 250  *
 251  *****************************************************************************/
 252
 253 #define VNC_FEATURE_RESIZE                   0
 254 #define VNC_FEATURE_HEXTILE                  1
 255 #define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 256 #define VNC_FEATURE_WMVI                     3
 257 #define VNC_FEATURE_TIGHT                    4
 258 #define VNC_FEATURE_ZLIB                     5
 259 #define VNC_FEATURE_COPYRECT                 6
 260
 261 #define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 262 #define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 263 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 264 #define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 265 #define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 266 #define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 267 #define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 268
 269
 270 /*****************************************************************************
 271  *
 272  * Internal APIs
 273  *
 274  *****************************************************************************/
 275
 276 /* Event loop functions */
 277 void vnc_client_read(void *opaque);
 278 void vnc_client_write(void *opaque);
 279
 280 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 281 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 282
 283 /* Protocol I/O functions */
 284 void vnc_write(VncState *vs, const void *data, size_t len);
 285 void vnc_write_u32(VncState *vs, uint32_t value);
 286 void vnc_write_s32(VncState *vs, int32_t value);
 287 void vnc_write_u16(VncState *vs, uint16_t value);
 288 void vnc_write_u8(VncState *vs, uint8_t value);
 289 void vnc_flush(VncState *vs);
 290 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 291
 292
 293 /* Buffer I/O functions */
 294 uint8_t read_u8(uint8_t *data, size_t offset);
 295 uint16_t read_u16(uint8_t *data, size_t offset);
 296 int32_t read_s32(uint8_t *data, size_t offset);
 297 uint32_t read_u32(uint8_t *data, size_t offset);
 298
 299 /* Protocol stage functions */
 300 void vnc_client_error(VncState *vs);
 301 int vnc_client_io_error(VncState *vs, int ret, int last_errno);
 302
 303 void start_client_init(VncState *vs);
 304 void start_auth_vnc(VncState *vs);
 305
 306 /* Buffer management */
 307 void buffer_reserve(Buffer *buffer, size_t len);
 308 int buffer_empty(Buffer *buffer);
 309 uint8_t *buffer_end(Buffer *buffer);
 310 void buffer_reset(Buffer *buffer);
 311 void buffer_append(Buffer *buffer, const void *data, size_t len);
 312
 313
 314 /* Misc helpers */
 315
 316 char *vnc_socket_local_addr(const char *format, int fd);
 317 char *vnc_socket_remote_addr(const char *format, int fd);
 318
 319 #endif /* __QEMU_VNC_H */