mirror of
https://git.proxmox.com/git/qemu
synced 2025-10-31 20:36:04 +00:00
7536ee4bc3
This patch adds basic Websocket Protocol version 13 - RFC 6455 - support to QEMU VNC. Binary encoding support on the client side is mandatory. Because of the GnuTLS requirement the Websockets implementation is optional (--enable-vnc-ws). To activate Websocket support the VNC option "websocket"is used, for example "-vnc :0,websocket". The listen port for Websocket connections is (5700 + display) so if QEMU VNC is started with :0 the Websocket port would be 5700. As an alternative the Websocket port could be manually specified by using ",websocket=<port>" instead. Parts of the implementation base on Anthony Liguori's QEMU Websocket patch from 2010 and on Joel Martin's LibVNC Websocket implementation. Signed-off-by: Tim Hardeck <thardeck@suse.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/*
|
|
* QEMU VNC display driver: Websockets support
|
|
*
|
|
* Copyright (C) 2010 Joel Martin
|
|
* Copyright (C) 2012 Tim Hardeck
|
|
*
|
|
* This is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This software is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this software; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __QEMU_UI_VNC_WS_H
|
|
#define __QEMU_UI_VNC_WS_H
|
|
|
|
#include <gnutls/gnutls.h>
|
|
|
|
#define B64LEN(__x) (((__x + 2) / 3) * 12 / 3)
|
|
#define SHA1_DIGEST_LEN 20
|
|
|
|
#define WS_ACCEPT_LEN (B64LEN(SHA1_DIGEST_LEN) + 1)
|
|
#define WS_CLIENT_KEY_LEN 24
|
|
#define WS_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
|
|
#define WS_GUID_LEN strlen(WS_GUID)
|
|
|
|
#define WS_HANDSHAKE "HTTP/1.1 101 Switching Protocols\r\n\
|
|
Upgrade: websocket\r\n\
|
|
Connection: Upgrade\r\n\
|
|
Sec-WebSocket-Accept: %s\r\n\
|
|
Sec-WebSocket-Protocol: binary\r\n\
|
|
\r\n"
|
|
#define WS_HANDSHAKE_DELIM "\r\n"
|
|
#define WS_HANDSHAKE_END "\r\n\r\n"
|
|
#define WS_SUPPORTED_VERSION "13"
|
|
|
|
#define WS_HEAD_MIN_LEN sizeof(uint16_t)
|
|
#define WS_HEAD_MAX_LEN (WS_HEAD_MIN_LEN + sizeof(uint64_t) + sizeof(uint32_t))
|
|
|
|
typedef union WsMask {
|
|
char c[4];
|
|
uint32_t u;
|
|
} WsMask;
|
|
|
|
typedef struct QEMU_PACKED WsHeader {
|
|
unsigned char b0;
|
|
unsigned char b1;
|
|
union {
|
|
struct QEMU_PACKED {
|
|
uint16_t l16;
|
|
WsMask m16;
|
|
} s16;
|
|
struct QEMU_PACKED {
|
|
uint64_t l64;
|
|
WsMask m64;
|
|
} s64;
|
|
WsMask m;
|
|
} u;
|
|
} WsHeader;
|
|
|
|
enum {
|
|
WS_OPCODE_CONTINUATION = 0x0,
|
|
WS_OPCODE_TEXT_FRAME = 0x1,
|
|
WS_OPCODE_BINARY_FRAME = 0x2,
|
|
WS_OPCODE_CLOSE = 0x8,
|
|
WS_OPCODE_PING = 0x9,
|
|
WS_OPCODE_PONG = 0xA
|
|
};
|
|
|
|
void vncws_handshake_read(void *opaque);
|
|
long vnc_client_write_ws(VncState *vs);
|
|
long vnc_client_read_ws(VncState *vs);
|
|
void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size);
|
|
void vncws_encode_frame(Buffer *output, const void *payload,
|
|
const size_t payload_size);
|
|
int vncws_decode_frame(Buffer *input, uint8_t **payload,
|
|
size_t *payload_size, size_t *frame_size);
|
|
|
|
#endif /* __QEMU_UI_VNC_WS_H */
|