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/* Copyright (C) 2004 TightVNC Team. All Rights Reserved.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// -=- RFB Protocol
#include <rfb/Exception.h>
#include <rfb/LogWriter.h>
#include <rfbplayer/RfbProto.h>
using namespace rfb;
static LogWriter vlog("RfbProto");
//
// Constructor
//
RfbProto::RfbProto(char *fileName) {
is = NULL;
reader = NULL;
newSession(fileName);
}
//
// Destructor
//
RfbProto::~RfbProto() {
if (is) delete is;
is = 0;
if (reader) delete reader;
reader = 0;
}
void RfbProto::newSession(char *fileName) {
// Close the previous session
if (is) {
delete is;
is = NULL;
delete reader;
reader = NULL;
}
// Begin the new session
if (fileName != NULL) {
is = new FbsInputStream(fileName);
reader = new CMsgReaderV3(this, is);
initialiseProtocol();
}
}
void RfbProto::initialiseProtocol() {
state_ = RFBSTATE_PROTOCOL_VERSION;
}
void RfbProto::processMsg()
{
switch (state_) {
case RFBSTATE_PROTOCOL_VERSION: processVersionMsg(); break;
case RFBSTATE_SECURITY: processSecurityMsg(); break;
case RFBSTATE_INITIALISATION: processInitMsg(); break;
case RFBSTATE_NORMAL: reader->readMsg(); break;
default:
throw rfb::Exception("RfbProto::processMsg: invalid state");
}
}
void RfbProto::processVersionMsg()
{
vlog.debug("reading protocol version");
memset(&cp, 0, sizeof(cp));
bool done;
if (!cp.readVersion(is, &done)) {
state_ = RFBSTATE_INVALID;
throw rfb::Exception("reading version failed: wrong file format?", "RfbPlayer");
}
if (!done) return;
// The only official RFB protocol versions are currently 3.3, 3.7 and 3.8
if (!cp.isVersion(3,3) && !cp.isVersion(3,7) && !cp.isVersion(3,8)) {
char msg[256];
sprintf(msg,"File have unsupported RFB protocol version %d.%d",
cp.majorVersion, cp.minorVersion);
state_ = RFBSTATE_INVALID;
throw rfb::Exception(msg, "RfbPlayer Error");
}
state_ = RFBSTATE_SECURITY;
vlog.info("Using RFB protocol version %d.%d",
cp.majorVersion, cp.minorVersion);
}
void RfbProto::processSecurityMsg()
{
vlog.debug("processing security types message");
int secType = secTypeInvalid;
// legacy 3.3 server may only offer "vnc authentication" or "none"
secType = is->readU32();
if (secType == secTypeInvalid) {
int reasonLen = is->readU32();
char *reason = new char[reasonLen];
is->readBytes(reason, reasonLen);
throw rfb::Exception(reason, "RfbPlayer");
}
if (secType != secTypeNone) {
throw rfb::Exception("Wrong authentication type in the session file",
"RfbPlayer Error");
}
state_ = RFBSTATE_INITIALISATION;
}
void RfbProto::processInitMsg() {
vlog.debug("reading server initialisation");
reader->readServerInit();
}
void RfbProto::serverInit()
{
state_ = RFBSTATE_NORMAL;
vlog.debug("initialisation done");
}
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