summaryrefslogtreecommitdiff
path: root/vnc.h
blob: fcc68241275b8d9d6a722a72929f1937d9893440 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
/*
 * 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 */