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Diffstat (limited to 'vnc.h')
| -rw-r--r-- | vnc.h | 319 |
1 files changed, 319 insertions, 0 deletions
@@ -0,0 +1,319 @@ +/* + * 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 VncDisplay +{ + int lsock; + DisplayState *ds; + VncState *clients; + kbd_layout_t *kbd_layout; + + 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 VncSurface +{ + uint32_t dirty[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS]; + DisplaySurface *ds; +}; + +struct VncState +{ + QEMUTimer *timer; + int csock; + + DisplayState *ds; + struct VncSurface guest; /* guest visible surface (aka ds->surface) */ + struct VncSurface server; /* vnc server surface */ + + 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 */ |