618 lines
23 KiB
C++
Executable file
618 lines
23 KiB
C++
Executable file
/******************************************************************************\
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* Copyright (c) 2004-2020
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*
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* Author(s):
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* Volker Fischer
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*
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******************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*
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\******************************************************************************/
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#include "serverlist.h"
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/* Implementation *************************************************************/
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CServerListManager::CServerListManager ( const quint16 iNPortNum,
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const QString& sNCentServAddr,
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const QString& strServerInfo,
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const int iNumChannels,
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const bool bNCentServPingServerInList,
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CProtocol* pNConLProt )
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: tsConsoleStream ( *( ( new ConsoleWriterFactory() )->get() ) ),
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iNumPredefinedServers ( 0 ),
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eCentralServerAddressType ( AT_CUSTOM ), // must be AT_CUSTOM for the "no GUI" case
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bCentServPingServerInList ( bNCentServPingServerInList ),
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pConnLessProtocol ( pNConLProt ),
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eSvrRegStatus ( SRS_UNREGISTERED ),
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iSvrRegRetries ( 0 )
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{
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// set the central server address
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SetCentralServerAddress ( sNCentServAddr );
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// set the server internal address, including internal port number
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SlaveCurLocalHostAddress = CHostAddress( NetworkUtil::GetLocalAddress().InetAddr, iNPortNum );
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// prepare the server info information
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QStringList slServInfoSeparateParams;
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int iServInfoNumSplitItems = 0;
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if ( !strServerInfo.isEmpty() )
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{
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// split the different parameter strings
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slServInfoSeparateParams = strServerInfo.split ( ";" );
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// get the number of items in the split list
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iServInfoNumSplitItems = slServInfoSeparateParams.count();
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}
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// per definition, the very first entry is this server and this entry will
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// never be deleted
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ServerList.clear();
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// Init server list entry (server info for this server) with defaults. Per
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// definition the client substitutes the IP address of the central server
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// itself for his server list. If we are the central server, we assume that
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// we have a permanent server.
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CServerListEntry ThisServerListEntry ( CHostAddress(),
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SlaveCurLocalHostAddress,
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"",
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QLocale::system().country(),
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"",
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iNumChannels,
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GetIsCentralServer() );
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// parse the server info string according to definition:
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// [this server name];[this server city]; ...
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// [this server country as QLocale ID]; ...
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// per definition, we expect at least three parameters
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if ( iServInfoNumSplitItems >= 3 )
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{
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// [this server name]
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ThisServerListEntry.strName = slServInfoSeparateParams[0].left ( MAX_LEN_SERVER_NAME );
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// [this server city]
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ThisServerListEntry.strCity = slServInfoSeparateParams[1].left ( MAX_LEN_SERVER_CITY );
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// [this server country as QLocale ID]
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const int iCountry = slServInfoSeparateParams[2].toInt();
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if ( !slServInfoSeparateParams[2].isEmpty() && ( iCountry >= 0 ) && ( iCountry <= QLocale::LastCountry ) )
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{
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ThisServerListEntry.eCountry = static_cast<QLocale::Country> (
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iCountry );
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}
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}
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// per definition, the first entry in the server list is the own server
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ServerList.append ( ThisServerListEntry );
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// parse the predefined server infos (if any) according to definition:
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// [server1 address];[server1 name];[server1 city]; ...
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// [server1 country as QLocale ID]; ...
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// [server2 address];[server2 name];[server2 city]; ...
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// [server2 country as QLocale ID]; ...
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// ...
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int iCurUsedServInfoSplitItems = 3; // three items are used for this server
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// we always expect four items per new server, also check for maximum
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// allowed number of servers in the server list
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while ( ( iServInfoNumSplitItems - iCurUsedServInfoSplitItems >= 4 ) &&
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( iNumPredefinedServers <= MAX_NUM_SERVERS_IN_SERVER_LIST ) )
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{
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// create a new server list entry, we assume that servers which are
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// registered via the command line are permanent servers
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CServerListEntry NewServerListEntry ( CHostAddress(),
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CHostAddress(),
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"",
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QLocale::AnyCountry,
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"",
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iNumChannels,
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true );
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// [server n address]
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NetworkUtil().ParseNetworkAddress (
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slServInfoSeparateParams[iCurUsedServInfoSplitItems],
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NewServerListEntry.HostAddr );
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// [server n server internal address]
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// Not included in the static server info, so use external address
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NewServerListEntry.LHostAddr = NewServerListEntry.HostAddr;
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// [server n name]
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NewServerListEntry.strName =
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slServInfoSeparateParams[iCurUsedServInfoSplitItems + 1].left ( MAX_LEN_SERVER_NAME );
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// [server n city]
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NewServerListEntry.strCity =
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slServInfoSeparateParams[iCurUsedServInfoSplitItems + 2].left ( MAX_LEN_SERVER_CITY );
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// [server n country as QLocale ID]
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const int iCountry =
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slServInfoSeparateParams[iCurUsedServInfoSplitItems + 3].toInt();
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if ( ( iCountry >= 0 ) && ( iCountry <= QLocale::LastCountry ) )
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{
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NewServerListEntry.eCountry = static_cast<QLocale::Country> (
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iCountry );
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}
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// add the new server to the server list
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ServerList.append ( NewServerListEntry );
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// we have used four items and have created one predefined server
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// (adjust counters)
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iCurUsedServInfoSplitItems += 4;
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iNumPredefinedServers++;
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}
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// for slave servers start the one shot timer for determining if it is a
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// permanent server
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if ( !GetIsCentralServer() )
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{
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// 1 minute = 60 * 1000 ms
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QTimer::singleShot ( SERVLIST_TIME_PERMSERV_MINUTES * 60000,
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this, SLOT ( OnTimerIsPermanent() ) );
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}
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// prepare the register server response timer (single shot timer)
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TimerCLRegisterServerResp.setSingleShot ( true );
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TimerCLRegisterServerResp.setInterval ( REGISTER_SERVER_TIME_OUT_MS );
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// Connections -------------------------------------------------------------
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QObject::connect ( &TimerPollList, &QTimer::timeout,
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this, &CServerListManager::OnTimerPollList );
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QObject::connect ( &TimerPingServerInList, &QTimer::timeout,
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this, &CServerListManager::OnTimerPingServerInList );
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QObject::connect ( &TimerPingCentralServer, &QTimer::timeout,
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this, &CServerListManager::OnTimerPingCentralServer );
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QObject::connect ( &TimerRegistering, &QTimer::timeout,
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this, &CServerListManager::OnTimerRegistering );
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QObject::connect ( &TimerCLRegisterServerResp, &QTimer::timeout,
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this, &CServerListManager::OnTimerCLRegisterServerResp );
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}
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void CServerListManager::SetCentralServerAddress ( const QString sNCentServAddr )
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{
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QMutexLocker locker ( &Mutex );
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strCentralServerAddress = sNCentServAddr;
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// per definition: If the central server address is empty, the server list
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// is disabled.
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// per definition: If we are in server mode and the central server address
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// is the localhost address, we are in central server mode. For the central
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// server, the server list is always enabled.
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if ( !strCentralServerAddress.isEmpty() )
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{
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bIsCentralServer =
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(
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( !strCentralServerAddress.toLower().compare ( "localhost" ) ||
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!strCentralServerAddress.compare ( "127.0.0.1" ) ) &&
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( eCentralServerAddressType == AT_CUSTOM )
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);
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bEnabled = true;
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}
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else
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{
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bIsCentralServer = false;
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bEnabled = false;
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}
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}
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void CServerListManager::Update()
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{
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QMutexLocker locker ( &Mutex );
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if ( bEnabled )
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{
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if ( bIsCentralServer )
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{
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// start timer for polling the server list if enabled
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// 1 minute = 60 * 1000 ms
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TimerPollList.start ( SERVLIST_POLL_TIME_MINUTES * 60000 );
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if ( bCentServPingServerInList )
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{
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// start timer for sending ping messages to servers in the list
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TimerPingServerInList.start ( SERVLIST_UPDATE_PING_SERVERS_MS );
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}
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}
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else
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{
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// initiate registration right away so that we do not have to wait
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// for the first time out of the timer until the slave server gets
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// registered at the central server, note that we have to unlock
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// the mutex before calling the function since inside this function
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// the mutex is locked, too
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locker.unlock();
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{
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OnTimerRegistering();
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}
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locker.relock();
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// reset the retry counter to zero because update was called
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iSvrRegRetries = 0;
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// start timer for registration timeout
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TimerCLRegisterServerResp.start();
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// start timer for registering this server at the central server
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// 1 minute = 60 * 1000 ms
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TimerRegistering.start ( SERVLIST_REGIST_INTERV_MINUTES * 60000 );
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// Start timer for ping the central server in short intervals to
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// keep the port open at the NAT router.
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// If no NAT is used, we send the messages anyway since they do
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// not hurt (very low traffic). We also reuse the same update
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// time as used in the central server for pinging the slave
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// servers.
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TimerPingCentralServer.start ( SERVLIST_UPDATE_PING_SERVERS_MS );
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}
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}
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else
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{
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// disable service -> stop timer
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if ( bIsCentralServer )
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{
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TimerPollList.stop();
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if ( bCentServPingServerInList )
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{
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TimerPingServerInList.stop();
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}
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}
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else
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{
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TimerCLRegisterServerResp.stop();
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TimerRegistering.stop();
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TimerPingCentralServer.stop();
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}
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}
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}
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/* Central server functionality ***********************************************/
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void CServerListManager::OnTimerPingServerInList()
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{
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QMutexLocker locker ( &Mutex );
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const int iCurServerListSize = ServerList.size();
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// send ping to list entries except of the very first one (which is the central
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// server entry) and the predefined servers
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for ( int iIdx = 1 + iNumPredefinedServers; iIdx < iCurServerListSize; iIdx++ )
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{
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// send empty message to keep NAT port open at slave server
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pConnLessProtocol->CreateCLEmptyMes ( ServerList[iIdx].HostAddr );
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}
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}
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void CServerListManager::OnTimerPollList()
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{
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CVector<CHostAddress> vecRemovedHostAddr;
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QMutexLocker locker ( &Mutex );
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// Check all list entries except of the very first one (which is the central
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// server entry) and the predefined servers if they are still valid.
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// Note that we have to use "ServerList.size()" function in the for loop
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// since we may remove elements from the server list inside the for loop.
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for ( int iIdx = 1 + iNumPredefinedServers; iIdx < ServerList.size(); )
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{
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// 1 minute = 60 * 1000 ms
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if ( ServerList[iIdx].RegisterTime.elapsed() > ( SERVLIST_TIME_OUT_MINUTES * 60000 ) )
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{
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// remove this list entry
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vecRemovedHostAddr.Add ( ServerList[iIdx].HostAddr );
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ServerList.removeAt ( iIdx );
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}
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else
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{
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// move to the next entry (only on else)
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iIdx++;
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}
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}
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locker.unlock();
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foreach ( const CHostAddress HostAddr, vecRemovedHostAddr )
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{
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tsConsoleStream << "Expired entry for " << HostAddr.toString() << endl;
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}
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}
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void CServerListManager::CentralServerRegisterServer ( const CHostAddress& InetAddr,
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const CHostAddress& LInetAddr,
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const CServerCoreInfo& ServerInfo )
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{
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if ( bIsCentralServer && bEnabled )
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{
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tsConsoleStream << "Requested to register entry for "
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<< InetAddr.toString() << " (" << LInetAddr.toString() << ")"
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<< ": " << ServerInfo.strName << endl;
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QMutexLocker locker ( &Mutex );
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const int iCurServerListSize = ServerList.size();
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// Check if server is already registered.
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// The very first list entry must not be checked since
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// this is per definition the central server (i.e., this server)
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int iSelIdx = INVALID_INDEX; // initialize with an illegal value
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for ( int iIdx = 1; iIdx < iCurServerListSize; iIdx++ )
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{
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if ( ServerList[iIdx].HostAddr == InetAddr )
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{
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// store entry index
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iSelIdx = iIdx;
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// entry found, leave for-loop
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continue;
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}
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}
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// if server is not yet registered, we have to create a new entry
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if ( iSelIdx == INVALID_INDEX )
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{
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// check for maximum allowed number of servers in the server list
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if ( iCurServerListSize < MAX_NUM_SERVERS_IN_SERVER_LIST )
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{
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// create a new server list entry and init with received data
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ServerList.append ( CServerListEntry ( InetAddr, LInetAddr, ServerInfo ) );
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iSelIdx = iCurServerListSize;
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}
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}
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else
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{
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// do not update the information in the predefined servers
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if ( iSelIdx > iNumPredefinedServers )
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{
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// update all data and call update registration function
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ServerList[iSelIdx].LHostAddr = LInetAddr;
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ServerList[iSelIdx].strName = ServerInfo.strName;
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ServerList[iSelIdx].eCountry = ServerInfo.eCountry;
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ServerList[iSelIdx].strCity = ServerInfo.strCity;
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ServerList[iSelIdx].iMaxNumClients = ServerInfo.iMaxNumClients;
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ServerList[iSelIdx].bPermanentOnline = ServerInfo.bPermanentOnline;
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ServerList[iSelIdx].UpdateRegistration();
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}
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}
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pConnLessProtocol->CreateCLRegisterServerResp ( InetAddr, iSelIdx == INVALID_INDEX
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? ESvrRegResult::SRR_CENTRAL_SVR_FULL
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: ESvrRegResult::SRR_REGISTERED );
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}
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}
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void CServerListManager::CentralServerUnregisterServer ( const CHostAddress& InetAddr )
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{
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if ( bIsCentralServer && bEnabled )
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{
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tsConsoleStream << "Requested to unregister entry for "
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<< InetAddr.toString() << endl;
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QMutexLocker locker ( &Mutex );
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const int iCurServerListSize = ServerList.size();
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// Find the server to unregister in the list. The very first list entry
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// must not be checked since this is per definition the central server
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// (i.e., this server), also the predefined servers must not be checked.
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for ( int iIdx = 1 + iNumPredefinedServers; iIdx < iCurServerListSize; iIdx++ )
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{
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if ( ServerList[iIdx].HostAddr == InetAddr )
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{
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// remove this list entry
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ServerList.removeAt ( iIdx );
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// entry found, leave for-loop (it is important to exit the
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// for loop since when we remove an item from the server list,
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// "iCurServerListSize" is not correct anymore and we could get
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// a segmentation fault)
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break;
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}
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}
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}
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}
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void CServerListManager::CentralServerQueryServerList ( const CHostAddress& InetAddr )
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{
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QMutexLocker locker ( &Mutex );
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if ( bIsCentralServer && bEnabled )
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{
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const int iCurServerListSize = ServerList.size();
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// allocate memory for the entire list
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CVector<CServerInfo> vecServerInfo ( iCurServerListSize );
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// copy the list (we have to copy it since the message requires
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// a vector but the list is actually stored in a QList object and
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// not in a vector object
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for ( int iIdx = 0; iIdx < iCurServerListSize; iIdx++ )
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{
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// copy list item
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vecServerInfo[iIdx] = ServerList[iIdx];
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if ( iIdx > 0 )
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{
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// check if the address of the client which is requesting the
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// list is the same address as one server in the list -> in this
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// case he has to connect to the local host address and port
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// to allow for NAT.
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if ( vecServerInfo[iIdx].HostAddr.InetAddr == InetAddr.InetAddr )
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{
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// for a predefined server:
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// - LHostAddr and HostAddr are the same
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// - no local port number is supplied
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// otherwise, use the supplied details
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if ( iIdx > iNumPredefinedServers )
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{
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vecServerInfo[iIdx].HostAddr = ServerList[iIdx].LHostAddr;
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}
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}
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else
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{
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// create "send empty message" for all registered servers
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// (except of the very first list entry since this is this
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// server (central server) per definition) and also it is
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// not required to send this message, if the server is on
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// the same computer
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pConnLessProtocol->CreateCLSendEmptyMesMes (
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vecServerInfo[iIdx].HostAddr,
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InetAddr );
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}
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}
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}
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// send the server list to the client
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pConnLessProtocol->CreateCLServerListMes ( InetAddr, vecServerInfo );
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}
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}
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/* Slave server functionality *************************************************/
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void CServerListManager::StoreRegistrationResult ( ESvrRegResult eResult )
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{
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// we need the lock since the user might change the server properties at
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// any time so another response could arrive
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QMutexLocker locker ( &Mutex );
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// we got some response, so stop the retry timer
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TimerCLRegisterServerResp.stop();
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switch ( eResult )
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{
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case ESvrRegResult::SRR_REGISTERED:
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SetSvrRegStatus ( ESvrRegStatus::SRS_REGISTERED );
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break;
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case ESvrRegResult::SRR_CENTRAL_SVR_FULL:
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SetSvrRegStatus ( ESvrRegStatus::SRS_CENTRAL_SVR_FULL );
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break;
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case ESvrRegResult::SRR_VERSION_TOO_OLD:
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SetSvrRegStatus ( ESvrRegStatus::SRS_VERSION_TOO_OLD );
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break;
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case ESvrRegResult::SRR_NOT_FULFILL_REQIREMENTS:
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SetSvrRegStatus ( ESvrRegStatus::SRS_NOT_FULFILL_REQUIREMENTS );
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break;
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default:
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SetSvrRegStatus ( ESvrRegStatus::SRS_UNKNOWN_RESP );
|
|
break;
|
|
}
|
|
}
|
|
|
|
void CServerListManager::OnTimerPingCentralServer()
|
|
{
|
|
QMutexLocker locker ( &Mutex );
|
|
|
|
// first check if central server address is valid
|
|
if ( !( SlaveCurCentServerHostAddress == CHostAddress() ) )
|
|
{
|
|
// send empty message to central server to keep NAT port open -> we do
|
|
// not require any answer from the central server
|
|
pConnLessProtocol->CreateCLEmptyMes ( SlaveCurCentServerHostAddress );
|
|
}
|
|
}
|
|
|
|
void CServerListManager::OnTimerCLRegisterServerResp()
|
|
{
|
|
QMutexLocker locker ( &Mutex );
|
|
|
|
if ( eSvrRegStatus == SRS_REQUESTED )
|
|
{
|
|
iSvrRegRetries++;
|
|
|
|
if ( iSvrRegRetries >= REGISTER_SERVER_RETRY_LIMIT )
|
|
{
|
|
SetSvrRegStatus ( SRS_TIME_OUT );
|
|
}
|
|
else
|
|
{
|
|
locker.unlock();
|
|
{
|
|
OnTimerRegistering();
|
|
}
|
|
locker.relock();
|
|
|
|
// re-start timer for registration timeout
|
|
TimerCLRegisterServerResp.start();
|
|
}
|
|
}
|
|
}
|
|
|
|
void CServerListManager::SlaveServerRegisterServer ( const bool bIsRegister )
|
|
{
|
|
// we need the lock since the user might change the server properties at
|
|
// any time
|
|
QMutexLocker locker ( &Mutex );
|
|
|
|
// get the correct central server address
|
|
const QString strCurCentrServAddr =
|
|
NetworkUtil::GetCentralServerAddress ( eCentralServerAddressType,
|
|
strCentralServerAddress );
|
|
|
|
// For the slave server, the slave server properties are stored in the
|
|
// very first item in the server list (which is actually no server list
|
|
// but just one item long for the slave server).
|
|
// Note that we always have to parse the server address again since if
|
|
// it is an URL of a dynamic IP address, the IP address might have
|
|
// changed in the meanwhile.
|
|
if ( NetworkUtil().ParseNetworkAddress ( strCurCentrServAddr,
|
|
SlaveCurCentServerHostAddress ) )
|
|
{
|
|
if ( bIsRegister )
|
|
{
|
|
// register server
|
|
SetSvrRegStatus ( SRS_REQUESTED );
|
|
|
|
pConnLessProtocol->CreateCLRegisterServerMes ( SlaveCurCentServerHostAddress,
|
|
SlaveCurLocalHostAddress,
|
|
ServerList[0] );
|
|
}
|
|
else
|
|
{
|
|
// unregister server
|
|
SetSvrRegStatus ( SRS_UNREGISTERED );
|
|
|
|
pConnLessProtocol->CreateCLUnregisterServerMes ( SlaveCurCentServerHostAddress );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
SetSvrRegStatus ( SRS_BAD_ADDRESS );
|
|
}
|
|
}
|
|
|
|
void CServerListManager::SetSvrRegStatus ( ESvrRegStatus eNSvrRegStatus )
|
|
{
|
|
// output regirstation result/update on the console
|
|
tsConsoleStream << "Server Registration Status update: " << svrRegStatusToString ( eNSvrRegStatus ) << endl;
|
|
|
|
// store the state and inform the GUI about the new status
|
|
eSvrRegStatus = eNSvrRegStatus;
|
|
emit SvrRegStatusChanged();
|
|
}
|