1 /* 2 * QEMU VNC display driver: Websockets support 3 * 4 * Copyright (C) 2010 Joel Martin 5 * Copyright (C) 2012 Tim Hardeck 6 * 7 * This is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This software is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this software; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #ifndef __QEMU_UI_VNC_WS_H 22 #define __QEMU_UI_VNC_WS_H 23 24 #include <gnutls/gnutls.h> 25 26 #define B64LEN(__x) (((__x + 2) / 3) * 12 / 3) 27 #define SHA1_DIGEST_LEN 20 28 29 #define WS_ACCEPT_LEN (B64LEN(SHA1_DIGEST_LEN) + 1) 30 #define WS_CLIENT_KEY_LEN 24 31 #define WS_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11" 32 #define WS_GUID_LEN strlen(WS_GUID) 33 34 #define WS_HANDSHAKE "HTTP/1.1 101 Switching Protocols\r\n\ 35 Upgrade: websocket\r\n\ 36 Connection: Upgrade\r\n\ 37 Sec-WebSocket-Accept: %s\r\n\ 38 Sec-WebSocket-Protocol: binary\r\n\ 39 \r\n" 40 #define WS_HANDSHAKE_DELIM "\r\n" 41 #define WS_HANDSHAKE_END "\r\n\r\n" 42 #define WS_SUPPORTED_VERSION "13" 43 44 #define WS_HEAD_MIN_LEN sizeof(uint16_t) 45 #define WS_HEAD_MAX_LEN (WS_HEAD_MIN_LEN + sizeof(uint64_t) + sizeof(uint32_t)) 46 47 typedef union WsMask { 48 char c[4]; 49 uint32_t u; 50 } WsMask; 51 52 typedef struct QEMU_PACKED WsHeader { 53 unsigned char b0; 54 unsigned char b1; 55 union { 56 struct QEMU_PACKED { 57 uint16_t l16; 58 WsMask m16; 59 } s16; 60 struct QEMU_PACKED { 61 uint64_t l64; 62 WsMask m64; 63 } s64; 64 WsMask m; 65 } u; 66 } WsHeader; 67 68 enum { 69 WS_OPCODE_CONTINUATION = 0x0, 70 WS_OPCODE_TEXT_FRAME = 0x1, 71 WS_OPCODE_BINARY_FRAME = 0x2, 72 WS_OPCODE_CLOSE = 0x8, 73 WS_OPCODE_PING = 0x9, 74 WS_OPCODE_PONG = 0xA 75 }; 76 77 #ifdef CONFIG_VNC_TLS 78 void vncws_tls_handshake_peek(void *opaque); 79 #endif /* CONFIG_VNC_TLS */ 80 void vncws_handshake_read(void *opaque); 81 long vnc_client_write_ws(VncState *vs); 82 long vnc_client_read_ws(VncState *vs); 83 void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size); 84 void vncws_encode_frame(Buffer *output, const void *payload, 85 const size_t payload_size); 86 int vncws_decode_frame(Buffer *input, uint8_t **payload, 87 size_t *payload_size, size_t *frame_size); 88 89 #endif /* __QEMU_UI_VNC_WS_H */ 90