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qemu/vnc.h

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/*
* QEMU VNC display driver
*
* Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
* Copyright (C) 2006 Fabrice Bellard
* Copyright (C) 2009 Red Hat, Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef __QEMU_VNC_H
#define __QEMU_VNC_H
#include "qemu-common.h"
#include "console.h"
#include "monitor.h"
#include "audio/audio.h"
#include <zlib.h>
#include "keymaps.h"
// #define _VNC_DEBUG 1
#ifdef _VNC_DEBUG
#define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
#else
#define VNC_DEBUG(fmt, ...) do { } while (0)
#endif
/*****************************************************************************
*
* Core data structures
*
*****************************************************************************/
typedef struct Buffer
{
size_t capacity;
size_t offset;
uint8_t *buffer;
} Buffer;
typedef struct VncState VncState;
typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
typedef void VncWritePixels(VncState *vs, void *data, int size);
typedef void VncSendHextileTile(VncState *vs,
int x, int y, int w, int h,
void *last_bg,
void *last_fg,
int *has_bg, int *has_fg);
#define VNC_MAX_WIDTH 2048
#define VNC_MAX_HEIGHT 2048
#define VNC_DIRTY_WORDS (VNC_MAX_WIDTH / (16 * 32))
#define VNC_AUTH_CHALLENGE_SIZE 16
typedef struct VncDisplay VncDisplay;
#ifdef CONFIG_VNC_TLS
#include "vnc-tls.h"
#include "vnc-auth-vencrypt.h"
#endif
#ifdef CONFIG_VNC_SASL
#include "vnc-auth-sasl.h"
#endif
struct VncSurface
{
uint32_t dirty[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS];
DisplaySurface *ds;
};
struct VncDisplay
{
QEMUTimer *timer;
int timer_interval;
int lsock;
DisplayState *ds;
VncState *clients;
kbd_layout_t *kbd_layout;
struct VncSurface guest; /* guest visible surface (aka ds->surface) */
DisplaySurface *server; /* vnc server surface */
char *display;
char *password;
int auth;
#ifdef CONFIG_VNC_TLS
int subauth; /* Used by VeNCrypt */
VncDisplayTLS tls;
#endif
#ifdef CONFIG_VNC_SASL
VncDisplaySASL sasl;
#endif
};
struct VncState
{
int csock;
DisplayState *ds;
uint32_t dirty[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS];
VncDisplay *vd;
int need_update;
int force_update;
uint32_t features;
int absolute;
int last_x;
int last_y;
uint32_t vnc_encoding;
uint8_t tight_quality;
uint8_t tight_compression;
int major;
int minor;
char challenge[VNC_AUTH_CHALLENGE_SIZE];
#ifdef CONFIG_VNC_TLS
VncStateTLS tls;
#endif
#ifdef CONFIG_VNC_SASL
VncStateSASL sasl;
#endif
Buffer output;
Buffer input;
/* current output mode information */
VncWritePixels *write_pixels;
VncSendHextileTile *send_hextile_tile;
DisplaySurface clientds;
CaptureVoiceOut *audio_cap;
struct audsettings as;
VncReadEvent *read_handler;
size_t read_handler_expect;
/* input */
uint8_t modifiers_state[256];
Buffer zlib;
Buffer zlib_tmp;
z_stream zlib_stream[4];
VncState *next;
};
/*****************************************************************************
*
* Authentication modes
*
*****************************************************************************/
enum {
VNC_AUTH_INVALID = 0,
VNC_AUTH_NONE = 1,
VNC_AUTH_VNC = 2,
VNC_AUTH_RA2 = 5,
VNC_AUTH_RA2NE = 6,
VNC_AUTH_TIGHT = 16,
VNC_AUTH_ULTRA = 17,
VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */
VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */
};
enum {
VNC_AUTH_VENCRYPT_PLAIN = 256,
VNC_AUTH_VENCRYPT_TLSNONE = 257,
VNC_AUTH_VENCRYPT_TLSVNC = 258,
VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
VNC_AUTH_VENCRYPT_X509NONE = 260,
VNC_AUTH_VENCRYPT_X509VNC = 261,
VNC_AUTH_VENCRYPT_X509PLAIN = 262,
VNC_AUTH_VENCRYPT_X509SASL = 263,
VNC_AUTH_VENCRYPT_TLSSASL = 264,
};
/*****************************************************************************
*
* Encoding types
*
*****************************************************************************/
#define VNC_ENCODING_RAW 0x00000000
#define VNC_ENCODING_COPYRECT 0x00000001
#define VNC_ENCODING_RRE 0x00000002
#define VNC_ENCODING_CORRE 0x00000004
#define VNC_ENCODING_HEXTILE 0x00000005
#define VNC_ENCODING_ZLIB 0x00000006
#define VNC_ENCODING_TIGHT 0x00000007
#define VNC_ENCODING_ZLIBHEX 0x00000008
#define VNC_ENCODING_TRLE 0x0000000f
#define VNC_ENCODING_ZRLE 0x00000010
#define VNC_ENCODING_ZYWRLE 0x00000011
#define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */
#define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */
#define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */
#define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */
#define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */
#define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */
#define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */
#define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */
#define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */
#define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */
#define VNC_ENCODING_WMVi 0x574D5669
/*****************************************************************************
*
* Other tight constants
*
*****************************************************************************/
/*
* Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
*/
#define VNC_TIGHT_CCB_RESET_MASK (0x0f)
#define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4)
#define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4)
#define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4)
#define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4)
#define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4)
#define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
/*****************************************************************************
*
* Features
*
*****************************************************************************/
#define VNC_FEATURE_RESIZE 0
#define VNC_FEATURE_HEXTILE 1
#define VNC_FEATURE_POINTER_TYPE_CHANGE 2
#define VNC_FEATURE_WMVI 3
#define VNC_FEATURE_TIGHT 4
#define VNC_FEATURE_ZLIB 5
#define VNC_FEATURE_COPYRECT 6
#define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE)
#define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE)
#define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
#define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI)
#define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT)
#define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB)
#define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT)
/*****************************************************************************
*
* Internal APIs
*
*****************************************************************************/
/* Event loop functions */
void vnc_client_read(void *opaque);
void vnc_client_write(void *opaque);
long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
/* Protocol I/O functions */
void vnc_write(VncState *vs, const void *data, size_t len);
void vnc_write_u32(VncState *vs, uint32_t value);
void vnc_write_s32(VncState *vs, int32_t value);
void vnc_write_u16(VncState *vs, uint16_t value);
void vnc_write_u8(VncState *vs, uint8_t value);
void vnc_flush(VncState *vs);
void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
/* Buffer I/O functions */
uint8_t read_u8(uint8_t *data, size_t offset);
uint16_t read_u16(uint8_t *data, size_t offset);
int32_t read_s32(uint8_t *data, size_t offset);
uint32_t read_u32(uint8_t *data, size_t offset);
/* Protocol stage functions */
void vnc_client_error(VncState *vs);
int vnc_client_io_error(VncState *vs, int ret, int last_errno);
void start_client_init(VncState *vs);
void start_auth_vnc(VncState *vs);
/* Buffer management */
void buffer_reserve(Buffer *buffer, size_t len);
int buffer_empty(Buffer *buffer);
uint8_t *buffer_end(Buffer *buffer);
void buffer_reset(Buffer *buffer);
void buffer_append(Buffer *buffer, const void *data, size_t len);
/* Misc helpers */
char *vnc_socket_local_addr(const char *format, int fd);
char *vnc_socket_remote_addr(const char *format, int fd);
#endif /* __QEMU_VNC_H */
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