590 lines
18 KiB
C
590 lines
18 KiB
C
/*
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* QEMU VNC display driver
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*
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* Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
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* Copyright (C) 2006 Fabrice Bellard
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* Copyright (C) 2009 Red Hat, Inc
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef __QEMU_VNC_H
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#define __QEMU_VNC_H
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#include "qemu-common.h"
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#include "qemu/queue.h"
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#include "qemu/thread.h"
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#include "ui/console.h"
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#include "monitor/monitor.h"
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#include "audio/audio.h"
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#include "qemu/bitmap.h"
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#include <zlib.h>
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#include <stdbool.h>
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#include "keymaps.h"
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#include "vnc-palette.h"
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#include "vnc-enc-zrle.h"
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// #define _VNC_DEBUG 1
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#ifdef _VNC_DEBUG
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#define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
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#else
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#define VNC_DEBUG(fmt, ...) do { } while (0)
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#endif
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/*****************************************************************************
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*
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* Core data structures
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*
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*****************************************************************************/
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typedef struct Buffer
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{
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size_t capacity;
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size_t offset;
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uint8_t *buffer;
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} Buffer;
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typedef struct VncState VncState;
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typedef struct VncJob VncJob;
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typedef struct VncRect VncRect;
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typedef struct VncRectEntry VncRectEntry;
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typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
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typedef void VncWritePixels(VncState *vs, void *data, int size);
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typedef void VncSendHextileTile(VncState *vs,
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int x, int y, int w, int h,
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void *last_bg,
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void *last_fg,
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int *has_bg, int *has_fg);
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/* VNC_MAX_WIDTH must be a multiple of 16. */
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#define VNC_MAX_WIDTH 2560
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#define VNC_MAX_HEIGHT 2048
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/* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
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#define VNC_DIRTY_BITS (VNC_MAX_WIDTH / 16)
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#define VNC_STAT_RECT 64
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#define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
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#define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
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#define VNC_AUTH_CHALLENGE_SIZE 16
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typedef struct VncDisplay VncDisplay;
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#ifdef CONFIG_VNC_TLS
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#include "vnc-tls.h"
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#include "vnc-auth-vencrypt.h"
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#endif
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#ifdef CONFIG_VNC_SASL
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#include "vnc-auth-sasl.h"
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#endif
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#ifdef CONFIG_VNC_WS
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#include "vnc-ws.h"
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#endif
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struct VncRectStat
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{
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/* time of last 10 updates, to find update frequency */
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struct timeval times[10];
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int idx;
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double freq; /* Update frequency (in Hz) */
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bool updated; /* Already updated during this refresh */
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};
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typedef struct VncRectStat VncRectStat;
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struct VncSurface
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{
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struct timeval last_freq_check;
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DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_MAX_WIDTH / 16);
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VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
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pixman_image_t *fb;
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pixman_format_code_t format;
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};
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typedef enum VncShareMode {
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VNC_SHARE_MODE_CONNECTING = 1,
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VNC_SHARE_MODE_SHARED,
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VNC_SHARE_MODE_EXCLUSIVE,
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VNC_SHARE_MODE_DISCONNECTED,
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} VncShareMode;
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typedef enum VncSharePolicy {
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VNC_SHARE_POLICY_IGNORE = 1,
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VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
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VNC_SHARE_POLICY_FORCE_SHARED,
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} VncSharePolicy;
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struct VncDisplay
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{
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QTAILQ_HEAD(, VncState) clients;
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int num_exclusive;
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VncSharePolicy share_policy;
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int lsock;
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#ifdef CONFIG_VNC_WS
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int lwebsock;
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bool websocket;
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char *ws_display;
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#endif
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DisplaySurface *ds;
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DisplayChangeListener dcl;
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kbd_layout_t *kbd_layout;
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int lock_key_sync;
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QemuMutex mutex;
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QEMUCursor *cursor;
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int cursor_msize;
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uint8_t *cursor_mask;
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struct VncSurface guest; /* guest visible surface (aka ds->surface) */
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pixman_image_t *server; /* vnc server surface */
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char *display;
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char *password;
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time_t expires;
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int auth;
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bool lossy;
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bool non_adaptive;
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#ifdef CONFIG_VNC_TLS
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int subauth; /* Used by VeNCrypt */
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VncDisplayTLS tls;
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#endif
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#ifdef CONFIG_VNC_SASL
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VncDisplaySASL sasl;
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#endif
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};
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typedef struct VncTight {
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int type;
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uint8_t quality;
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uint8_t compression;
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uint8_t pixel24;
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Buffer tight;
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Buffer tmp;
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Buffer zlib;
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Buffer gradient;
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#ifdef CONFIG_VNC_JPEG
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Buffer jpeg;
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#endif
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#ifdef CONFIG_VNC_PNG
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Buffer png;
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#endif
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int levels[4];
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z_stream stream[4];
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} VncTight;
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typedef struct VncHextile {
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VncSendHextileTile *send_tile;
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} VncHextile;
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typedef struct VncZlib {
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Buffer zlib;
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Buffer tmp;
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z_stream stream;
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int level;
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} VncZlib;
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typedef struct VncZrle {
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int type;
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Buffer fb;
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Buffer zrle;
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Buffer tmp;
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Buffer zlib;
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z_stream stream;
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VncPalette palette;
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} VncZrle;
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typedef struct VncZywrle {
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int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
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} VncZywrle;
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struct VncRect
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{
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int x;
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int y;
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int w;
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int h;
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};
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struct VncRectEntry
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{
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struct VncRect rect;
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QLIST_ENTRY(VncRectEntry) next;
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};
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struct VncJob
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{
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VncState *vs;
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QLIST_HEAD(, VncRectEntry) rectangles;
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QTAILQ_ENTRY(VncJob) next;
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};
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struct VncState
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{
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int csock;
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DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
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uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
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* vnc-jobs-async.c */
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VncDisplay *vd;
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int need_update;
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int force_update;
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uint32_t features;
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int absolute;
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int last_x;
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int last_y;
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uint32_t last_bmask;
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int client_width;
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int client_height;
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VncShareMode share_mode;
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uint32_t vnc_encoding;
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int major;
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int minor;
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int auth;
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char challenge[VNC_AUTH_CHALLENGE_SIZE];
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#ifdef CONFIG_VNC_TLS
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int subauth; /* Used by VeNCrypt */
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VncStateTLS tls;
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#endif
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#ifdef CONFIG_VNC_SASL
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VncStateSASL sasl;
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#endif
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#ifdef CONFIG_VNC_WS
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#ifdef CONFIG_VNC_TLS
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VncStateTLS ws_tls;
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#endif /* CONFIG_VNC_TLS */
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bool encode_ws;
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bool websocket;
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#endif /* CONFIG_VNC_WS */
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QObject *info;
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Buffer output;
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Buffer input;
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#ifdef CONFIG_VNC_WS
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Buffer ws_input;
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Buffer ws_output;
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#endif
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/* current output mode information */
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VncWritePixels *write_pixels;
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PixelFormat client_pf;
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pixman_format_code_t client_format;
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bool client_be;
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CaptureVoiceOut *audio_cap;
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struct audsettings as;
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VncReadEvent *read_handler;
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size_t read_handler_expect;
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/* input */
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uint8_t modifiers_state[256];
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QEMUPutLEDEntry *led;
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bool abort;
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bool initialized;
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QemuMutex output_mutex;
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QEMUBH *bh;
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Buffer jobs_buffer;
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/* Encoding specific, if you add something here, don't forget to
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* update vnc_async_encoding_start()
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*/
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VncTight tight;
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VncZlib zlib;
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VncHextile hextile;
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VncZrle zrle;
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VncZywrle zywrle;
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Notifier mouse_mode_notifier;
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QTAILQ_ENTRY(VncState) next;
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};
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/*****************************************************************************
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*
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* Authentication modes
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*
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*****************************************************************************/
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enum {
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VNC_AUTH_INVALID = 0,
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VNC_AUTH_NONE = 1,
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VNC_AUTH_VNC = 2,
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VNC_AUTH_RA2 = 5,
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VNC_AUTH_RA2NE = 6,
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VNC_AUTH_TIGHT = 16,
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VNC_AUTH_ULTRA = 17,
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VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */
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VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
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VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */
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};
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enum {
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VNC_AUTH_VENCRYPT_PLAIN = 256,
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VNC_AUTH_VENCRYPT_TLSNONE = 257,
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VNC_AUTH_VENCRYPT_TLSVNC = 258,
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VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
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VNC_AUTH_VENCRYPT_X509NONE = 260,
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VNC_AUTH_VENCRYPT_X509VNC = 261,
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VNC_AUTH_VENCRYPT_X509PLAIN = 262,
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VNC_AUTH_VENCRYPT_X509SASL = 263,
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VNC_AUTH_VENCRYPT_TLSSASL = 264,
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};
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/*****************************************************************************
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*
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* Encoding types
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*
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*****************************************************************************/
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#define VNC_ENCODING_RAW 0x00000000
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#define VNC_ENCODING_COPYRECT 0x00000001
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#define VNC_ENCODING_RRE 0x00000002
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#define VNC_ENCODING_CORRE 0x00000004
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#define VNC_ENCODING_HEXTILE 0x00000005
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#define VNC_ENCODING_ZLIB 0x00000006
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#define VNC_ENCODING_TIGHT 0x00000007
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#define VNC_ENCODING_ZLIBHEX 0x00000008
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#define VNC_ENCODING_TRLE 0x0000000f
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#define VNC_ENCODING_ZRLE 0x00000010
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#define VNC_ENCODING_ZYWRLE 0x00000011
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#define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */
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#define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */
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#define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */
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#define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */
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#define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */
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#define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */
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#define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */
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#define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */
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#define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */
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#define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */
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#define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */
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#define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */
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#define VNC_ENCODING_WMVi 0x574D5669
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/*****************************************************************************
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*
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* Other tight constants
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*
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*****************************************************************************/
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/*
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* Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
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*/
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#define VNC_TIGHT_CCB_RESET_MASK (0x0f)
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#define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4)
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#define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4)
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#define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4)
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#define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4)
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#define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4)
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#define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4)
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#define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
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/*****************************************************************************
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*
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* Features
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*
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*****************************************************************************/
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#define VNC_FEATURE_RESIZE 0
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#define VNC_FEATURE_HEXTILE 1
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#define VNC_FEATURE_POINTER_TYPE_CHANGE 2
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#define VNC_FEATURE_WMVI 3
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#define VNC_FEATURE_TIGHT 4
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#define VNC_FEATURE_ZLIB 5
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#define VNC_FEATURE_COPYRECT 6
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#define VNC_FEATURE_RICH_CURSOR 7
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#define VNC_FEATURE_TIGHT_PNG 8
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#define VNC_FEATURE_ZRLE 9
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#define VNC_FEATURE_ZYWRLE 10
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#define VNC_FEATURE_LED_STATE 11
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#define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE)
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#define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE)
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#define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
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#define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI)
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#define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT)
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#define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB)
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#define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT)
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#define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR)
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#define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG)
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#define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE)
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#define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE)
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#define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE)
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/* Client -> Server message IDs */
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#define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0
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#define VNC_MSG_CLIENT_SET_ENCODINGS 2
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#define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
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#define VNC_MSG_CLIENT_KEY_EVENT 4
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#define VNC_MSG_CLIENT_POINTER_EVENT 5
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#define VNC_MSG_CLIENT_CUT_TEXT 6
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#define VNC_MSG_CLIENT_VMWARE_0 127
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#define VNC_MSG_CLIENT_CALL_CONTROL 249
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#define VNC_MSG_CLIENT_XVP 250
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#define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251
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#define VNC_MSG_CLIENT_TIGHT 252
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#define VNC_MSG_CLIENT_GII 253
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#define VNC_MSG_CLIENT_VMWARE_1 254
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#define VNC_MSG_CLIENT_QEMU 255
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/* Server -> Client message IDs */
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#define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0
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#define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1
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#define VNC_MSG_SERVER_BELL 2
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#define VNC_MSG_SERVER_CUT_TEXT 3
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#define VNC_MSG_SERVER_VMWARE_0 127
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#define VNC_MSG_SERVER_CALL_CONTROL 249
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#define VNC_MSG_SERVER_XVP 250
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#define VNC_MSG_SERVER_TIGHT 252
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#define VNC_MSG_SERVER_GII 253
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#define VNC_MSG_SERVER_VMWARE_1 254
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#define VNC_MSG_SERVER_QEMU 255
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/* QEMU client -> server message IDs */
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#define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0
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#define VNC_MSG_CLIENT_QEMU_AUDIO 1
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/* QEMU server -> client message IDs */
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#define VNC_MSG_SERVER_QEMU_AUDIO 1
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/* QEMU client -> server audio message IDs */
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#define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0
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#define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1
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#define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2
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/* QEMU server -> client audio message IDs */
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#define VNC_MSG_SERVER_QEMU_AUDIO_END 0
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#define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1
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#define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2
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/*****************************************************************************
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*
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* Internal APIs
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*
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*****************************************************************************/
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/* Event loop functions */
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void vnc_client_read(void *opaque);
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void vnc_client_write(void *opaque);
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long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
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long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
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/* Protocol I/O functions */
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void vnc_write(VncState *vs, const void *data, size_t len);
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void vnc_write_u32(VncState *vs, uint32_t value);
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void vnc_write_s32(VncState *vs, int32_t value);
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void vnc_write_u16(VncState *vs, uint16_t value);
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void vnc_write_u8(VncState *vs, uint8_t value);
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void vnc_flush(VncState *vs);
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void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
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void vnc_disconnect_finish(VncState *vs);
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void vnc_init_state(VncState *vs);
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/* Buffer I/O functions */
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uint32_t read_u32(uint8_t *data, size_t offset);
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/* Protocol stage functions */
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void vnc_client_error(VncState *vs);
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int vnc_client_io_error(VncState *vs, int ret, int last_errno);
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void start_client_init(VncState *vs);
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void start_auth_vnc(VncState *vs);
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/* Buffer management */
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void buffer_reserve(Buffer *buffer, size_t len);
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void buffer_reset(Buffer *buffer);
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void buffer_free(Buffer *buffer);
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void buffer_append(Buffer *buffer, const void *data, size_t len);
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void buffer_advance(Buffer *buf, size_t len);
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uint8_t *buffer_end(Buffer *buffer);
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/* Misc helpers */
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char *vnc_socket_local_addr(const char *format, int fd);
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char *vnc_socket_remote_addr(const char *format, int fd);
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static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
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return (vs->features & (1 << feature));
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}
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/* Framebuffer */
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void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
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int32_t encoding);
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/* server fb is in PIXMAN_x8r8g8b8 */
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#define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
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#define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
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#define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8)
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void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
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int vnc_server_fb_stride(VncDisplay *vd);
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void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
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double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
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void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
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/* Encodings */
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int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
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int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
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int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
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int y, int w, int h);
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void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
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void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
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void vnc_zlib_zfree(void *x, void *addr);
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int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
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void vnc_zlib_clear(VncState *vs);
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int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
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int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
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int w, int h);
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void vnc_tight_clear(VncState *vs);
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int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
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int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
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void vnc_zrle_clear(VncState *vs);
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#endif /* __QEMU_VNC_H */
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