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 #define B64LEN(__x) (((__x + 2) / 3) * 12 / 3) 25 #define SHA1_DIGEST_LEN 20 26 27 #define WS_ACCEPT_LEN (B64LEN(SHA1_DIGEST_LEN) + 1) 28 #define WS_CLIENT_KEY_LEN 24 29 #define WS_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11" 30 #define WS_GUID_LEN strlen(WS_GUID) 31 32 #define WS_HANDSHAKE "HTTP/1.1 101 Switching Protocols\r\n\ 33 Upgrade: websocket\r\n\ 34 Connection: Upgrade\r\n\ 35 Sec-WebSocket-Accept: %s\r\n\ 36 Sec-WebSocket-Protocol: binary\r\n\ 37 \r\n" 38 #define WS_HANDSHAKE_DELIM "\r\n" 39 #define WS_HANDSHAKE_END "\r\n\r\n" 40 #define WS_SUPPORTED_VERSION "13" 41 42 #define WS_HEAD_MIN_LEN sizeof(uint16_t) 43 #define WS_HEAD_MAX_LEN (WS_HEAD_MIN_LEN + sizeof(uint64_t) + sizeof(uint32_t)) 44 45 typedef union WsMask { 46 char c[4]; 47 uint32_t u; 48 } WsMask; 49 50 typedef struct QEMU_PACKED WsHeader { 51 unsigned char b0; 52 unsigned char b1; 53 union { 54 struct QEMU_PACKED { 55 uint16_t l16; 56 WsMask m16; 57 } s16; 58 struct QEMU_PACKED { 59 uint64_t l64; 60 WsMask m64; 61 } s64; 62 WsMask m; 63 } u; 64 } WsHeader; 65 66 enum { 67 WS_OPCODE_CONTINUATION = 0x0, 68 WS_OPCODE_TEXT_FRAME = 0x1, 69 WS_OPCODE_BINARY_FRAME = 0x2, 70 WS_OPCODE_CLOSE = 0x8, 71 WS_OPCODE_PING = 0x9, 72 WS_OPCODE_PONG = 0xA 73 }; 74 75 #ifdef CONFIG_VNC_TLS 76 void vncws_tls_handshake_io(void *opaque); 77 #endif /* CONFIG_VNC_TLS */ 78 void vncws_handshake_read(void *opaque); 79 long vnc_client_write_ws(VncState *vs); 80 long vnc_client_read_ws(VncState *vs); 81 void vncws_process_handshake(VncState *vs, uint8_t *line, size_t size); 82 void vncws_encode_frame(Buffer *output, const void *payload, 83 const size_t payload_size); 84 int vncws_decode_frame_header(Buffer *input, 85 size_t *header_size, 86 size_t *payload_remain, 87 WsMask *payload_mask); 88 int vncws_decode_frame_payload(Buffer *input, 89 size_t *payload_remain, WsMask *payload_mask, 90 uint8_t **payload, size_t *payload_size); 91 92 #endif /* __QEMU_UI_VNC_WS_H */ 93