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#include "listenclienthandler.h"
void ListenClientHandler::onListenClientRead()
{
// clear buffer from previous intereactions
if ( _rxBuffer.contains("\\final\\") )
{
// if the keyword "\\final\\" is already found, a previous interaction was completed
// it is now safe to clear the buffer
_rxBuffer = "";
}
// read incoming data
QByteArray receiveBuffer = _tcpSocket->readAll();
_coreObject->Log.logEvent("tcp", QStringLiteral("%1 sent '%2'")
.arg(_clientLabel, receiveBuffer.data()) );
// reset timeout when data is received
_timeOut.start();
// add data to buffer and wait for the interaction to be complete
_rxBuffer += receiveBuffer;
if ( ! receiveBuffer.contains("\\final\\") )
{
// wait for data to be complete
return;
}
// process data according to \key\value formatting
QMultiHash<QString, QString> receiveData = parseGameSpy0Buffer(_rxBuffer.toLatin1());
// part 1: validation challenge.
if ( receiveData.contains("validate") )
{
// combined queries provide two gamenames: one for authentication and one for list request.
QString gamename = ( receiveData.values("gamename").size() >= 2
? receiveData.values("gamename").takeLast() // removes duplicate gamename
: receiveData.value("gamename","") );
// enctype2 list requested?
_requestEnctype2 = ( receiveData.value("enctype","0").compare("2") == 0 );
_coreObject->Log.logEvent("debug", QStringLiteral("%1 uses enctype2 = (%2)").arg(_clientLabel, QString::number(_requestEnctype2)));
// sanity check
if ( _coreObject->SupportedGames.contains(gamename) )
{
// get response
AuthResult authResult = validateGamename(false, // tcp client, not a beacon
gamename,
receiveData.value("validate",""),
_coreObject->SupportedGames.value(gamename).cipher,
_secure,
receiveData.value("enctype", "0").toInt() );
// authenticate
if ( authResult.auth )
{
_hasValidated = true;
_coreObject->Log.logEvent("secure", QStringLiteral("%1 passed validation for %2").arg(_clientLabel, gamename));
}
else
{
_coreObject->Log.logEvent("secure", QStringLiteral("%1 failed validation for %2").arg(_clientLabel, gamename));
// log detailed information on failure
_coreObject->Log.logEvent("secure", QStringLiteral("secure: '%1', gamename: '%2', validate: '%3', expected: '%4'")
.arg(_secure, gamename, receiveData.value("validate", "null"), authResult.validate ));
// kick client after unsuccessful validation
this->disconnect();
}
}
else
{
_coreObject->Log.logEvent("secure", QStringLiteral("%1 tried to validate for unknown game %2").arg(_clientLabel, gamename));
// log detailed information on failure
_coreObject->Log.logEvent("secure", QStringLiteral("secure: '%1', gamename: '%2', validate: '%3'")
.arg(_secure, gamename, receiveData.value("validate", "NULL") ));
// kick client after unsuccessful validation
this->disconnect();
}
} // hasValidated ?
// part 2: after validation, send serverlist
if ( receiveData.contains("list") )
{
// list request is only granted after validation
if ( ! _hasValidated )
{
// kick client after unsuccessful validation
_coreObject->Log.logEvent("secure", QStringLiteral("%1 requested a list for %2 without validating").arg(_clientLabel, receiveData.value("gamename", "")) );
this->disconnect();
return;
}
// get list from db
QByteArray writeBuffer = compileServerlist(
receiveData.value("gamename", ""),
_coreObject->Settings.ListenServerSettings.serverttl_s,
(receiveData.value("list","").compare("cmp", Qt::CaseInsensitive) == 0 ));
// encrypt with enctype2 if requested
if ( _requestEnctype2 )
{
// more debug
_coreObject->Log.logEvent("debug", QStringLiteral("%1 requests enctype2 (%2)").arg(_clientLabel, QString::number(_requestEnctype2)));
// combined queries provide two gamenames: one for authentication and one for list request.
QString gamename = ( receiveData.values("gamename").size() >= 2
? receiveData.values("gamename").takeLast() // removes duplicate gamename
: receiveData.value("gamename","") );
// datatype conversions
int newLen = writeBuffer.length() + 15;
unsigned char* encBuf = new unsigned char[ newLen ];
unsigned char* secKey = new unsigned char[ 7 ]; // 6 bytes long, no string terminator
memcpy(encBuf, writeBuffer.constData(), writeBuffer.length()); // original len, 15 byte uninitialised
if ( _coreObject->SupportedGames.contains( gamename ) )
{
QByteArray baSecKey = _coreObject->SupportedGames.value(gamename).cipher.toLatin1();
baSecKey.append('\0');
memcpy(secKey, baSecKey, 6); // what if baSecKey < 6? :skull:
}
// encrypt the buffer
enctype2_encoder(secKey, encBuf, writeBuffer.length() );
// convert back to byte array
QByteArray writeBuf = QByteArray((const char*)encBuf, newLen);
_tcpSocket->write(writeBuf);
_coreObject->Log.logEvent("list", QStringLiteral("%1 received the enctype2 list for %2").arg(_clientLabel, receiveData.value("gamename", "")));
}
else
{
_tcpSocket->write(writeBuffer);
_coreObject->Log.logEvent("list", QStringLiteral("%1 received the list for %2").arg(_clientLabel, receiveData.value("gamename", "")));
}
// all done
this->disconnect();
} // list
// part 2b: 333networks synchronisation
if ( receiveData.contains("sync") )
{
// list request is only granted after validation
if ( ! _hasValidated )
{
// kick client after unsuccessful validation
_coreObject->Log.logEvent("secure", QStringLiteral("%1 requested to sync for %2 without validating").arg(_clientLabel, receiveData.value("gamename", "")) );
this->disconnect();
return;
}
// do not sync with ourself
QString remoteIdentity = receiveData.value("msid", "");
if ( _coreObject->masterserverIdentity == remoteIdentity )
{
// msid match -- skip syncing
_tcpSocket->write("\\final\\");
_coreObject->Log.logEvent("list", QStringLiteral("skipping sync for self at %1").arg(_clientLabel) );
this->disconnect();
return;
}
// sync request has options "all" or "gamename_1 gamename_2 gamename_n"
QStringList gamenameList;
if ( receiveData.value("sync","").toLower().compare("all") == 0 )
{
// get list of gamenames from database
gamenameList = getGamenames(_coreObject->Settings.ListenServerSettings.serverttl_s);
}
else
{
// only load gamenames that are in our list of available games
QStringListIterator rawListNames( receiveData.value("sync","").toLower().split(" ") );
while ( rawListNames.hasNext() )
{
QString rawGamename = overrideGamename( rawListNames.next() );
if ( _coreObject->SupportedGames.contains(rawGamename) )
{
gamenameList.append(rawGamename);
}
}
}
// get compiled sync list for all requested gamenames
QByteArray writeBuffer = compileSyncList(
gamenameList,
_coreObject->Settings.ListenServerSettings.serverttl_s);
_tcpSocket->write(writeBuffer);
// log (displays all the gamenames that were synced or empty when no gamenames/servers were available)
_coreObject->Log.logEvent("list", QStringLiteral("%1 received the sync list for %2").arg(_clientLabel, gamenameList.join(",")) );
// all done
this->disconnect();
} // sync
// optional: echo
if ( receiveData.contains("echo") )
{
_coreObject->Log.logEvent("echo", QStringLiteral("%1 echoed %2").arg(_clientLabel, receiveData.value("echo", "")) );
_tcpSocket->write("\\echo_reply\\" + receiveData.value("echo", "").toLatin1() );
}
// else
// unknown, log as error
if ( ! receiveData.contains("validate") and
! receiveData.contains("list") and
! receiveData.contains("sync") and
! receiveData.contains("echo") )
{
_coreObject->Log.logEvent("unknown", QStringLiteral("%1 with unknown request %2").arg(_clientLabel, _rxBuffer ) );
this->disconnect();
}
}
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