ServerMessageHandler.cpp

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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.
//
//    Scorched3D 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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#include <server/ServerMessageHandler.h>
#include <server/ScorchedServer.h>
#include <server/ScorchedServerUtil.h>
#include <server/ServerCommon.h>
#include <server/ServerBanned.h>
#include <server/ServerKeepAliveHandler.h>
#include <server/ServerChannelManager.h>
#include <server/ServerState.h>
#include <tank/TankDeadContainer.h>
#include <tank/TankState.h>
#include <tank/TankContainer.h>
#include <tankai/TankAIStore.h>
#include <coms/ComsRmPlayerMessage.h>
#include <coms/ComsMessageSender.h>
#include <net/NetInterface.h>
#include <common/Logger.h>
#include <common/OptionsScorched.h>
#include <common/StatsLogger.h>

ServerMessageHandler::DestinationInfo::DestinationInfo() :
        adminTries(0), admin(false)
{
}

ServerMessageHandler::DestinationInfo *ServerMessageHandler::getDestinationInfo(unsigned int destinationId)
{
        std::map<unsigned int, DestinationInfo>::iterator itor = 
                destinationInfos_.find(destinationId);
        if (itor == destinationInfos_.end()) return 0;
        return &itor->second;
}

ServerMessageHandler *ServerMessageHandler::instance_ = 0;

ServerMessageHandler *ServerMessageHandler::instance()
{
        if (!instance_)
        {
                instance_ = new ServerMessageHandler;
        }
        return instance_;
}

ServerMessageHandler::ServerMessageHandler()
{
}

ServerMessageHandler::~ServerMessageHandler()
{
}

void ServerMessageHandler::messageRecv(unsigned int destinationId)
{
        ServerKeepAliveHandler::instance()->keepAlive(destinationId);
}

void ServerMessageHandler::messageSent(unsigned int destinationId)
{
}

void ServerMessageHandler::clientConnected(NetMessage &message)
{
        // Check if this destination has been banned
        if (message.getIpAddress() != 0 &&
                ScorchedServerUtil::instance()->bannedPlayers.getBanned(message.getIpAddress()) == 
                ServerBanned::Banned)
        {
                Logger::log(S3D::formatStringBuffer("Banned client connected dest=\"%i\" ip=\"%s\"", 
                        message.getDestinationId(),
                        NetInterface::getIpName(message.getIpAddress())));
                ScorchedServer::instance()->getNetInterface().
                        disconnectClient(message.getDestinationId());
                return;
        }

        // Check if a player from this destination has connected already
        std::map<unsigned int, Tank *> &playingTanks = 
                ScorchedServer::instance()->getTankContainer().getPlayingTanks();
        std::map<unsigned int, Tank *>::iterator playingItor;
        for (playingItor = playingTanks.begin();
                playingItor != playingTanks.end();
                playingItor++)
        {
                Tank *current = (*playingItor).second;
                if (current->getDestinationId() == message.getDestinationId())
                {
                        Logger::log(S3D::formatStringBuffer("Duplicate connection from destination \"%i\"", 
                                message.getDestinationId()));
                        ScorchedServer::instance()->getNetInterface().
                                disconnectClient(message.getDestinationId());
                        return;
                }
                
                if (!ScorchedServer::instance()->getOptionsGame().getAllowSameIP() &&
                        message.getIpAddress() != 0)
                {
                        if (message.getIpAddress() == current->getIpAddress())
                        {
                                Logger::log(S3D::formatStringBuffer("Duplicate ip connection from ip address \"%s\"", 
                                        NetInterface::getIpName(message.getIpAddress())));
                                ScorchedServer::instance()->getNetInterface().
                                        disconnectClient(message.getDestinationId());
                                return;
                        }
                }
        }

        // Add to list of destinations
        destinationInfos_[message.getDestinationId()] = DestinationInfo();

        Logger::log(S3D::formatStringBuffer("Client connected dest=\"%i\" ip=\"%s\"", 
                message.getDestinationId(),
                NetInterface::getIpName(message.getIpAddress())));
}

void ServerMessageHandler::clientDisconnected(NetMessage &message)
{
        const char *reason = "Unknown";
        if (message.getFlags() == NetMessage::UserDisconnect) reason = "User";
        else if (message.getFlags() == NetMessage::KickDisconnect) reason = "Kicked";
        else if (message.getFlags() == NetMessage::TimeoutDisconnect) reason = "Timeout";

        Logger::log(S3D::formatStringBuffer("Client disconnected dest=\"%i\" ip=\"%s\" reason=\"%s\"", 
                message.getDestinationId(),
                NetInterface::getIpName(message.getIpAddress()),
                reason));

        // Build up a list of players at this destination
        std::list<unsigned int> removePlayers;
        unsigned int destinationId = message.getDestinationId();
        std::map<unsigned int, Tank *>::iterator itor;
        std::map<unsigned int, Tank *> &tanks = 
                ScorchedServer::instance()->getTankContainer().getPlayingTanks();
        for (itor = tanks.begin();
                itor != tanks.end();
                itor++)
        {
                Tank *tank = (*itor).second;
                if (tank->getDestinationId() == destinationId)
                {
                        removePlayers.push_back(tank->getPlayerId());
                }
        }

        // Remove all players for this destination
        std::list<unsigned int>::iterator remItor;
        for (remItor = removePlayers.begin();
                 remItor != removePlayers.end();
                 remItor++)
        {
                unsigned int playerId = *remItor;
                destroyPlayer(playerId, reason);
        }

        // Inform the channel manager
        ServerChannelManager::instance()->destinationDisconnected(message.getDestinationId());

        // Remove from list of destinations
        destinationInfos_.erase(message.getDestinationId());
}

void ServerMessageHandler::destroyPlayer(unsigned int tankId, const char *reason)
{
        // Try to remove this player
        Tank *tank = ScorchedServer::instance()->getTankContainer().getTankById(tankId);
        if (!tank)
        {
                Logger::log(S3D::formatStringBuffer("Unknown player disconnected id=\"%i\" (%s)", 
                        tankId, reason));
                return;
        }

        // Log disconnect
        Logger::log( 
                S3D::formatStringBuffer("Player disconnected dest=\"%i\" id=\"%i\" name=\"%s\" reason=\"%s\"", 
                tank->getDestinationId(),
                tankId, 
                tank->getCStrName().c_str(),
                reason));
        ServerChannelManager::instance()->sendText(
                ChannelText("info", 
                        "PLAYER_DISCONNECTED", 
                        "Player disconnected \"{0}\" ({1})",
                        tank->getTargetName(), reason),
                true);

        // Check if we can remove player
        if (tank->getState().getState() == TankState::sNormal &&
                ScorchedServer::instance()->getGameState().getState() == ServerState::ServerStateShot)
        {
                // Store a residual copy, that will be over written when the player is actual deleted
                ScorchedServer::instance()->getTankDeadContainer().addTank(tank);

                // We are in a state where we cannot remove the player straight away
                tank->getState().setDestroy(true);

                // Make this player a computer controlled player
                if (tank->getDestinationId() != 0)
                {
                        TankAI *ai = ScorchedServer::instance()->getTankAIs().getAIByName("Random");
                        tank->setTankAI(ai->createCopy(tank));
                        tank->setDestinationId(0);
                        tank->setKeepAlive(0);
                }
        }
        else
        {
                // Destroy the player straight away
                actualDestroyPlayer(tankId);
        }
}

void ServerMessageHandler::destroyTaggedPlayers()
{
        std::map<unsigned int, Tank *> tanks = 
                ScorchedServer::instance()->getTankContainer().getAllTanks();
        std::map<unsigned int, Tank *>::iterator itor;
        for (itor = tanks.begin();
                itor != tanks.end();
                itor++)
        {
                Tank *tank = itor->second;
                if (tank->getState().getDestroy())
                {
                        actualDestroyPlayer(tank->getPlayerId());
                }
        }
}

void ServerMessageHandler::actualDestroyPlayer(unsigned int tankId)
{
        // Try to remove this player
        Tank *tank = ScorchedServer::instance()->getTankContainer().removeTank(tankId);
        if (!tank) return;

        StatsLogger::instance()->tankDisconnected(tank);

        // Tell all the clients to remove this player
        ComsRmPlayerMessage rmPlayerMessage(
                tankId);
        ComsMessageSender::sendToAllConnectedClients(rmPlayerMessage);

        // Tidy player
        ScorchedServer::instance()->getTankDeadContainer().addTank(tank);
        delete tank;
}

void ServerMessageHandler::clientError(NetMessage &message,
                const char *errorString)
{
        Logger::log(S3D::formatStringBuffer("Client \"%i\", ***Server Error*** \"%s\"", 
                message.getDestinationId(),
                errorString));
        ServerCommon::kickDestination(message.getDestinationId());
}

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