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/*
* The Mana World
* Copyright 2004 The Mana World Development Team
*
* This file is part of The Mana World.
*
* The Mana World 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 World 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 World; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
*/
#include "network.h"
#include <enet/enet.h>
#include <map>
#include "connection.h"
#include "internal.h"
#include "messagehandler.h"
#include "messagein.h"
#include "../log.h"
/**
* The local host which is shared for all outgoing connections.
*/
namespace {
ENetHost *client;
}
typedef std::map<unsigned short, MessageHandler*> MessageHandlers;
typedef MessageHandlers::iterator MessageHandlerIterator;
static MessageHandlers mMessageHandlers;
void Net::initialize()
{
if (enet_initialize())
{
logger->error("Failed to initialize ENet.");
}
client = enet_host_create(NULL, 3, 0, 0);
if (!client)
{
logger->error("Failed to create the local host.");
}
}
void Net::finalize()
{
if (!client)
return; // Wasn't initialized at all
if (Net::connections) {
logger->error("Tried to shutdown the network subsystem while there "
"are network connections left!");
}
clearHandlers();
enet_deinitialize();
}
Net::Connection *Net::getConnection()
{
if (!client)
{
logger->error("Tried to instantiate a network object before "
"initializing the network subsystem!");
}
return new Net::Connection(client);
}
void
Net::registerHandler(MessageHandler *handler)
{
for (const Uint16 *i = handler->handledMessages; *i; i++)
{
mMessageHandlers[*i] = handler;
}
}
void
Net::unregisterHandler(MessageHandler *handler)
{
for (const Uint16 *i = handler->handledMessages; *i; i++)
{
mMessageHandlers.erase(*i);
}
}
void
Net::clearHandlers()
{
mMessageHandlers.clear();
}
/**
* Dispatches a message to the appropriate message handler and
* destroys it afterwards.
*/
namespace
{
void
dispatchMessage(ENetPacket *packet)
{
MessageIn msg((const char *)packet->data, packet->dataLength);
MessageHandlerIterator iter = mMessageHandlers.find(msg.getId());
if (iter != mMessageHandlers.end()) {
logger->log("Received packet %x (%i B)",
msg.getId(), msg.getLength());
iter->second->handleMessage(msg);
}
else {
logger->log("Unhandled packet %x (%i B)",
msg.getId(), msg.getLength());
}
// Clean up the packet now that we're done using it.
enet_packet_destroy(packet);
}
}
void Net::flush()
{
ENetEvent event;
// Wait up to 10 milliseconds for an event.
while (enet_host_service(client, &event, 10) > 0)
{
switch (event.type)
{
case ENET_EVENT_TYPE_CONNECT:
logger->log("Connected.");
// Store any relevant server information here.
event.peer->data = 0;
break;
case ENET_EVENT_TYPE_RECEIVE:
dispatchMessage(event.packet);
break;
case ENET_EVENT_TYPE_DISCONNECT:
logger->log("Disconnected.");
// Reset the server information.
event.peer->data = 0;
break;
case ENET_EVENT_TYPE_NONE:
logger->log("No event during 10 milliseconds.");
break;
default:
logger->log("Unhandled enet event.");
break;
}
}
}
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