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 "console.h"
  33 #include "monitor.h"
  34 #include "audio/audio.h"
  35 #include <zlib.h>
  36
  37 #include "keymaps.h"
  38
  39 // #define _VNC_DEBUG 1
  40
  41 #ifdef _VNC_DEBUG
  42 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  43 #else
  44 #define VNC_DEBUG(fmt, ...) do { } while (0)
  45 #endif
  46
  47 /*****************************************************************************
  48  *
  49  * Core data structures
  50  *
  51  *****************************************************************************/
  52
  53 typedef struct Buffer
  54 {
  55     size_t capacity;
  56     size_t offset;
  57     uint8_t *buffer;
  58 } Buffer;
  59
  60 typedef struct VncState VncState;
  61
  62 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  63
  64 typedef void VncWritePixels(VncState *vs, void *data, int size);
  65
  66 typedef void VncSendHextileTile(VncState *vs,
  67                                 int x, int y, int w, int h,
  68                                 void *last_bg,
  69                                 void *last_fg,
  70                                 int *has_bg, int *has_fg);
  71
  72 #define VNC_MAX_WIDTH 2560
  73 #define VNC_MAX_HEIGHT 2048
  74 #define VNC_DIRTY_WORDS (VNC_MAX_WIDTH / (16 * 32))
  75
  76 #define VNC_AUTH_CHALLENGE_SIZE 16
  77
  78 typedef struct VncDisplay VncDisplay;
  79
  80 #ifdef CONFIG_VNC_TLS
  81 #include "vnc-tls.h"
  82 #include "vnc-auth-vencrypt.h"
  83 #endif
  84 #ifdef CONFIG_VNC_SASL
  85 #include "vnc-auth-sasl.h"
  86 #endif
  87
  88 struct VncSurface
  89 {
  90     uint32_t dirty[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS];
  91     DisplaySurface *ds;
  92 };
  93
  94 struct VncDisplay
  95 {
  96     QTAILQ_HEAD(, VncState) clients;
  97     QEMUTimer *timer;
  98     int timer_interval;
  99     int lsock;
 100     DisplayState *ds;
 101     kbd_layout_t *kbd_layout;
 102
 103     struct VncSurface guest;   /* guest visible surface (aka ds->surface) */
 104     DisplaySurface *server;  /* vnc server surface */
 105
 106     char *display;
 107     char *password;
 108     int auth;
 109 #ifdef CONFIG_VNC_TLS
 110     int subauth; /* Used by VeNCrypt */
 111     VncDisplayTLS tls;
 112 #endif
 113 #ifdef CONFIG_VNC_SASL
 114     VncDisplaySASL sasl;
 115 #endif
 116 };
 117
 118 struct VncState
 119 {
 120     int csock;
 121
 122     DisplayState *ds;
 123     uint32_t dirty[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS];
 124
 125     VncDisplay *vd;
 126     int need_update;
 127     int force_update;
 128     uint32_t features;
 129     int absolute;
 130     int last_x;
 131     int last_y;
 132
 133     uint32_t vnc_encoding;
 134     uint8_t tight_quality;
 135     uint8_t tight_compression;
 136
 137     int major;
 138     int minor;
 139
 140     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 141 #ifdef CONFIG_VNC_TLS
 142     VncStateTLS tls;
 143 #endif
 144 #ifdef CONFIG_VNC_SASL
 145     VncStateSASL sasl;
 146 #endif
 147
 148     QObject *info;
 149
 150     Buffer output;
 151     Buffer input;
 152     /* current output mode information */
 153     VncWritePixels *write_pixels;
 154     VncSendHextileTile *send_hextile_tile;
 155     DisplaySurface clientds;
 156
 157     CaptureVoiceOut *audio_cap;
 158     struct audsettings as;
 159
 160     VncReadEvent *read_handler;
 161     size_t read_handler_expect;
 162     /* input */
 163     uint8_t modifiers_state[256];
 164
 165     Buffer zlib;
 166     Buffer zlib_tmp;
 167     z_stream zlib_stream[4];
 168
 169     QTAILQ_ENTRY(VncState) next;
 170 };
 171
 172
 173 /*****************************************************************************
 174  *
 175  * Authentication modes
 176  *
 177  *****************************************************************************/
 178
 179 enum {
 180     VNC_AUTH_INVALID = 0,
 181     VNC_AUTH_NONE = 1,
 182     VNC_AUTH_VNC = 2,
 183     VNC_AUTH_RA2 = 5,
 184     VNC_AUTH_RA2NE = 6,
 185     VNC_AUTH_TIGHT = 16,
 186     VNC_AUTH_ULTRA = 17,
 187     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 188     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 189     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 190 };
 191
 192 enum {
 193     VNC_AUTH_VENCRYPT_PLAIN = 256,
 194     VNC_AUTH_VENCRYPT_TLSNONE = 257,
 195     VNC_AUTH_VENCRYPT_TLSVNC = 258,
 196     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 197     VNC_AUTH_VENCRYPT_X509NONE = 260,
 198     VNC_AUTH_VENCRYPT_X509VNC = 261,
 199     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 200     VNC_AUTH_VENCRYPT_X509SASL = 263,
 201     VNC_AUTH_VENCRYPT_TLSSASL = 264,
 202 };
 203
 204
 205 /*****************************************************************************
 206  *
 207  * Encoding types
 208  *
 209  *****************************************************************************/
 210
 211 #define VNC_ENCODING_RAW                  0x00000000
 212 #define VNC_ENCODING_COPYRECT             0x00000001
 213 #define VNC_ENCODING_RRE                  0x00000002
 214 #define VNC_ENCODING_CORRE                0x00000004
 215 #define VNC_ENCODING_HEXTILE              0x00000005
 216 #define VNC_ENCODING_ZLIB                 0x00000006
 217 #define VNC_ENCODING_TIGHT                0x00000007
 218 #define VNC_ENCODING_ZLIBHEX              0x00000008
 219 #define VNC_ENCODING_TRLE                 0x0000000f
 220 #define VNC_ENCODING_ZRLE                 0x00000010
 221 #define VNC_ENCODING_ZYWRLE               0x00000011
 222 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 223 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 224 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 225 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 226 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 227 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 228 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 229 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 230 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 231 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 232 #define VNC_ENCODING_WMVi                 0x574D5669
 233
 234 /*****************************************************************************
 235  *
 236  * Other tight constants
 237  *
 238  *****************************************************************************/
 239
 240 /*
 241  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 242  */
 243
 244 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 245 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 246 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 247 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 248 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 249 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 250 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 251
 252 /*****************************************************************************
 253  *
 254  * Features
 255  *
 256  *****************************************************************************/
 257
 258 #define VNC_FEATURE_RESIZE                   0
 259 #define VNC_FEATURE_HEXTILE                  1
 260 #define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 261 #define VNC_FEATURE_WMVI                     3
 262 #define VNC_FEATURE_TIGHT                    4
 263 #define VNC_FEATURE_ZLIB                     5
 264 #define VNC_FEATURE_COPYRECT                 6
 265
 266 #define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 267 #define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 268 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 269 #define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 270 #define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 271 #define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 272 #define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 273
 274
 275 /*****************************************************************************
 276  *
 277  * Internal APIs
 278  *
 279  *****************************************************************************/
 280
 281 /* Event loop functions */
 282 void vnc_client_read(void *opaque);
 283 void vnc_client_write(void *opaque);
 284
 285 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 286 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 287
 288 /* Protocol I/O functions */
 289 void vnc_write(VncState *vs, const void *data, size_t len);
 290 void vnc_write_u32(VncState *vs, uint32_t value);
 291 void vnc_write_s32(VncState *vs, int32_t value);
 292 void vnc_write_u16(VncState *vs, uint16_t value);
 293 void vnc_write_u8(VncState *vs, uint8_t value);
 294 void vnc_flush(VncState *vs);
 295 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 296
 297
 298 /* Buffer I/O functions */
 299 uint8_t read_u8(uint8_t *data, size_t offset);
 300 uint16_t read_u16(uint8_t *data, size_t offset);
 301 int32_t read_s32(uint8_t *data, size_t offset);
 302 uint32_t read_u32(uint8_t *data, size_t offset);
 303
 304 /* Protocol stage functions */
 305 void vnc_client_error(VncState *vs);
 306 int vnc_client_io_error(VncState *vs, int ret, int last_errno);
 307
 308 void start_client_init(VncState *vs);
 309 void start_auth_vnc(VncState *vs);
 310
 311 /* Buffer management */
 312 void buffer_reserve(Buffer *buffer, size_t len);
 313 int buffer_empty(Buffer *buffer);
 314 uint8_t *buffer_end(Buffer *buffer);
 315 void buffer_reset(Buffer *buffer);
 316 void buffer_append(Buffer *buffer, const void *data, size_t len);
 317
 318
 319 /* Misc helpers */
 320
 321 char *vnc_socket_local_addr(const char *format, int fd);
 322 char *vnc_socket_remote_addr(const char *format, int fd);
 323
 324 #endif /* __QEMU_VNC_H */