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
/*
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* QEMU VNC display driver: Websockets support
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*
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* Copyright (C) 2010 Joel Martin
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* Copyright (C) 2012 Tim Hardeck
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __QEMU_UI_VNC_WS_H
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#define __QEMU_UI_VNC_WS_H
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#include <gnutls/gnutls.h>
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#define B64LEN(__x) (((__x + 2) / 3) * 12 / 3)
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#define SHA1_DIGEST_LEN 20
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#define WS_ACCEPT_LEN (B64LEN(SHA1_DIGEST_LEN) + 1)
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#define WS_CLIENT_KEY_LEN 24
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#define WS_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
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#define WS_GUID_LEN strlen(WS_GUID)
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#define WS_HANDSHAKE "HTTP/1.1 101 Switching Protocols\r\n\
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Upgrade: websocket\r\n\
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Connection: Upgrade\r\n\
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Sec-WebSocket-Accept: %s\r\n\
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Sec-WebSocket-Protocol: binary\r\n\
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\r\n"
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#define WS_HANDSHAKE_DELIM "\r\n"
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#define WS_HANDSHAKE_END "\r\n\r\n"
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#define WS_SUPPORTED_VERSION "13"
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#define WS_HEAD_MIN_LEN sizeof(uint16_t)
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#define WS_HEAD_MAX_LEN (WS_HEAD_MIN_LEN + sizeof(uint64_t) + sizeof(uint32_t))
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typedef union WsMask {
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char c[4];
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uint32_t u;
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} WsMask;
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typedef struct QEMU_PACKED WsHeader {
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unsigned char b0;
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unsigned char b1;
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union {
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struct QEMU_PACKED {
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uint16_t l16;
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WsMask m16;
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} s16;
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struct QEMU_PACKED {
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uint64_t l64;
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WsMask m64;
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} s64;
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WsMask m;
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} u;
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} WsHeader;
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enum {
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WS_OPCODE_CONTINUATION = 0x0,
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WS_OPCODE_TEXT_FRAME = 0x1,
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WS_OPCODE_BINARY_FRAME = 0x2,
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WS_OPCODE_CLOSE = 0x8,
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WS_OPCODE_PING = 0x9,
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WS_OPCODE_PONG = 0xA
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};
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void vncws_handshake_read(void *opaque);
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long vnc_client_write_ws(VncState *vs);
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long vnc_client_read_ws(VncState *vs);
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void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size);
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void vncws_encode_frame(Buffer *output, const void *payload,
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const size_t payload_size);
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int vncws_decode_frame(Buffer *input, uint8_t **payload,
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size_t *payload_size, size_t *frame_size);
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#endif /* __QEMU_UI_VNC_WS_H */
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