diff options
Diffstat (limited to 'debian/transcode/transcode-1.1.7/import/probe_vnc.c')
| -rw-r--r-- | debian/transcode/transcode-1.1.7/import/probe_vnc.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/debian/transcode/transcode-1.1.7/import/probe_vnc.c b/debian/transcode/transcode-1.1.7/import/probe_vnc.c new file mode 100644 index 00000000..efee9cda --- /dev/null +++ b/debian/transcode/transcode-1.1.7/import/probe_vnc.c @@ -0,0 +1,146 @@ +/* + * probe_vnc.c + * + * Copyright (C) Brian de Alwis 2004 + * + * This file is part of transcode, a video stream processing tool + * + * transcode 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, or (at your option) + * any later version. + * + * transcode 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 GNU Make; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include "transcode.h" +#include "tcinfo.h" +#include "ioaux.h" +#include "tc.h" +#include "libtc/libtc.h" + + +/* Some VNC constants */ +#define VNCREC_MAGIC_STRING "vncLog0.0" +#define VNCREC_MAGIC_SIZE (9) +#define VNC_RFB_PROTOCOL_SCANF_FORMAT "RFB %03d.%03d\n" +#define VNC_RFB_PROTO_VERSION_SIZE (12) + +#define VNC33_CHALLENGESIZE (16) + +#define VNC33_rfbConnFailed (0) +#define VNC33_rfbNoAuth (1) +#define VNC33_rfbVncAuth (2) + +#define VNC33_rfbVncAuthOK (0) +#define VNC33_rfbVncAuthFailed (1) +#define VNC33_rfbVncAuthTooMany (2) + +/* + RFB 3.X protocol is as follows (from vncrec source code): + * server send 12-byte (SIZE_SIZE_RFB_PROTO_VERSION) header + encoding the RFB version as an ASCII string + * server sends 4-byte number (big-endian) to alert auth + requirements + * if requiring auth, server then sends 16-byte (VNC33_CHALLENGESIZE) + packet, which is to be encrypted and sent back (same size). + The server then sends 32-bit word result on pass-fail. Entire + thing aborted if not passed. + * client sends 1-byte message + * server then sends a display-paramters message, containing + (in order) the width (2-byte), height (2-byte), preferred pixel + format (1-byte), and desktop name (1-byte with length, n bytes). + */ + +void probe_vnc(info_t *ipipe) +{ + unsigned char buf[100]; + unsigned char matchingBuffer[100]; + int index = 0, major, minor, authReqs; + int width, height; + + if(tc_pread(ipipe->fd_in, buf, sizeof(buf)) != sizeof(buf)) { + tc_log_error(__FILE__, "end of stream"); + ipipe->error=1; + return; + } + + /* Check VNCREC magic */ + ac_memcpy(matchingBuffer, &buf[index], VNCREC_MAGIC_SIZE); + matchingBuffer[VNCREC_MAGIC_SIZE] = 0; + if(strcmp(matchingBuffer, VNCREC_MAGIC_STRING)) { /* NOT EQUAL */ + tc_log_error(__FILE__, "unsupported version of vncrec (\"%s\")", + matchingBuffer); + ipipe->error=1; + return; + } + index += VNCREC_MAGIC_SIZE; + + + /* Ensure RFB protocol is valid */ + ac_memcpy(matchingBuffer, &buf[index], VNC_RFB_PROTO_VERSION_SIZE); + matchingBuffer[VNC_RFB_PROTO_VERSION_SIZE] = 0; + if(sscanf(matchingBuffer, VNC_RFB_PROTOCOL_SCANF_FORMAT, &major, &minor) != 2) { + tc_log_error(__FILE__, "unknown RFB protocol (\"%s\")", + matchingBuffer); + ipipe->error=1; + return; + } + if (ipipe->verbose & TC_DEBUG) { + tc_log_msg(__FILE__, "File recorded as RFB Protocol v%d.%d", + major, minor); + } + if(major != 3) { + tc_log_error(__FILE__, "unsupported RFB protocol (only support v3)"); + ipipe->error=1; + return; + } + index += VNC_RFB_PROTO_VERSION_SIZE; + + /* Check authentication requirements */ + authReqs = (buf[index] << 24) | (buf[index+1] << 16) + | (buf[index+2] << 8) | buf[index+3]; + index += 4; + switch(authReqs) { + case VNC33_rfbNoAuth: + if (ipipe->verbose & TC_DEBUG) + tc_log_msg(__FILE__, "No authorization required."); + break; + + case VNC33_rfbVncAuth: { + int authResp = + index += VNC33_CHALLENGESIZE; + authResp = (buf[index] << 24) | (buf[index+1] << 16) + | (buf[index+2] << 8) | buf[index+3]; + /* switch(authResp) { ... } */ + index += 4; + break; + } + + case VNC33_rfbConnFailed: + default: + tc_log_error(__FILE__, "apparently connection failed?"); + ipipe->error=1; + return; + } + + /* Receive display parameters */ + width = (buf[index] << 8) | buf[index+1]; + height = (buf[index+2] << 8) | buf[index+3]; + + ipipe->probe_info->width = width; + ipipe->probe_info->height = height; + ipipe->probe_info->fps = 25.; + ipipe->probe_info->frc = 3; + ipipe->probe_info->codec = TC_CODEC_RGB; + ipipe->probe_info->magic = ipipe->magic; + +} |