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/*
* The Mana Server
* Copyright (C) 2004-2010 The Mana World Development Team
*
* This file is part of The Mana Server.
*
* The Mana Server 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
* any later version.
*
* The Mana Server 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 The Mana Server. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CONNECTIONHANDLER_H
#define CONNECTIONHANDLER_H
#include <list>
#include <string>
#include <enet/enet.h>
class MessageIn;
class MessageOut;
class NetComputer;
/**
* This class represents the connection handler interface. The connection
* handler will respond to connect/reconnect/disconnect events and handle
* incoming messages, passing them on to registered message handlers.
*/
class ConnectionHandler
{
public:
virtual ~ConnectionHandler() {}
/**
* Open the server socket.
*
* @param port the port to listen to
* @param hostname the host IP to listen on, defaults to the default localhost
*/
bool startListen(enet_uint16 port,
const std::string &hostname = std::string());
/**
* Disconnect all the clients and close the server socket.
*/
void stopListen();
/**
* Return the port the handler is listening on, or 0 if not listening.
*/
enet_uint16 getPort() const;
/**
* Return the host the handler was asked to listen on.
*/
const std::string &getHostname() const { return hostname; }
/**
* Process outgoing messages and listen to the server socket for
* incoming messages and new connections.
*
* @timeout an optional timeout in milliseconds to wait for something
* to happen when there is nothing to do
*/
void process(enet_uint32 timeout = 0);
/**
* Process outgoing messages.
*/
void flush();
/**
* Called when a computer sends a packet to the network session.
*/
//void receivePacket(NetComputer *computer, Packet *packet);
/**
* Send packet to every client, used for announcements.
*/
void sendToEveryone(const MessageOut &msg);
/**
* Return the number of connected clients.
*/
unsigned getClientCount() const;
private:
std::string hostname; /**< The unresolved host the handler was asked to listen on. */
ENetHost *host; /**< The ENet host that listen for connections. */
protected:
/**
* Called when a computer connects to the server. Initialize
* an object derived of NetComputer.
*/
virtual NetComputer *computerConnected(ENetPeer *peer) = 0;
/**
* Called when a computer reconnects to the server.
*/
//virtual NetComputer *computerReconnected(ENetPeer *) = 0;
/**
* Called when a computer disconnects from the server.
*
* <b>Note:</b> After returning from this method the NetComputer
* reference is no longer guaranteed to be valid.
*/
virtual void computerDisconnected(NetComputer *) = 0;
/**
* Called when a message is received.
*/
virtual void processMessage(NetComputer *, MessageIn &) = 0;
using NetComputers = std::list<NetComputer *>;
/**
* A list of pointers to the client structures created by
* computerConnected.
*/
NetComputers clients;
};
#endif
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