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/*
* The Mana Server
* Copyright (C) 2006-2010 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/>.
*/
#include "net/connection.h"
#include "net/bandwidth.h"
#include "net/messagein.h"
#include "net/messageout.h"
#include "utils/logger.h"
#ifdef ENET_VERSION_CREATE
#define ENET_CUTOFF ENET_VERSION_CREATE(1,3,0)
#else
#define ENET_CUTOFF 0xFFFFFFFF
#endif
Connection::Connection():
mRemote(0),
mLocal(0)
{
}
bool Connection::start(const std::string &address, int port)
{
ENetAddress enetAddress;
enet_address_set_host(&enetAddress, address.c_str());
enetAddress.port = port;
#if defined(ENET_VERSION) && ENET_VERSION >= ENET_CUTOFF
mLocal = enet_host_create(nullptr /* create a client host */,
1 /* allow one outgoing connection */,
0 /* unlimited channel count */,
0 /* assume any amount of incoming bandwidth */,
0 /* assume any amount of outgoing bandwidth */);
#else
mLocal = enet_host_create(nullptr /* create a client host */,
1 /* allow one outgoing connection */,
0 /* assume any amount of incoming bandwidth */,
0 /* assume any amount of outgoing bandwidth */);
#endif
if (!mLocal)
return false;
// Initiate the connection, allocating channel 0.
#if defined(ENET_VERSION) && ENET_VERSION >= ENET_CUTOFF
mRemote = enet_host_connect(mLocal, &enetAddress, 1, 0);
#else
mRemote = enet_host_connect(mLocal, &enetAddress, 1);
#endif
ENetEvent event;
if (enet_host_service(mLocal, &event, 10000) <= 0 ||
event.type != ENET_EVENT_TYPE_CONNECT)
{
stop();
return false;
}
return mRemote;
}
void Connection::stop()
{
if (mRemote)
enet_peer_disconnect(mRemote, 0);
if (mLocal)
enet_host_flush(mLocal);
if (mRemote)
enet_peer_reset(mRemote);
if (mLocal)
enet_host_destroy(mLocal);
mRemote = 0;
mLocal = 0;
}
bool Connection::isConnected() const
{
return mRemote && mRemote->state == ENET_PEER_STATE_CONNECTED;
}
void Connection::send(const MessageOut &msg, bool reliable, unsigned channel)
{
if (!mRemote) {
LOG_WARN("Can't send message to unconnected host! (" << msg << ")");
return;
}
gBandwidth->increaseInterServerOutput(msg.getLength());
ENetPacket *packet;
packet = enet_packet_create(msg.getData(),
msg.getLength(),
reliable ? ENET_PACKET_FLAG_RELIABLE : 0);
if (packet)
enet_peer_send(mRemote, channel, packet);
else
LOG_ERROR("Failure to create packet!");
}
void Connection::process()
{
ENetEvent event;
// Process Enet events and do not block.
while (enet_host_service(mLocal, &event, 0) > 0)
{
switch (event.type)
{
case ENET_EVENT_TYPE_RECEIVE:
if (event.packet->dataLength >= 2)
{
MessageIn msg((char *)event.packet->data,
event.packet->dataLength);
gBandwidth->increaseInterServerInput(event.packet->dataLength);
processMessage(msg);
}
else
{
LOG_WARN("Message too short.");
}
// Clean up the packet now that we are done using it.
enet_packet_destroy(event.packet);
break;
default:
break;
}
}
}
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