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/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file tcp_turn.h Basic functions to receive and send TCP packets to/from the TURN server.
*/
#ifndef NETWORK_CORE_TCP_TURN_H
#define NETWORK_CORE_TCP_TURN_H
#include "os_abstraction.h"
#include "tcp.h"
#include "packet.h"
#include "game_info.h"
/** Enum with all types of TCP TURN packets. The order MUST not be changed. **/
enum PacketTurnType {
PACKET_TURN_TURN_ERROR, ///< TURN server is unable to relay.
PACKET_TURN_SERCLI_CONNECT, ///< Client or server is connecting to the TURN server.
PACKET_TURN_TURN_CONNECTED, ///< TURN server indicates the socket is now being relayed.
PACKET_TURN_END, ///< Must ALWAYS be on the end of this list!! (period)
};
/** Base socket handler for all TURN TCP sockets. */
class NetworkTurnSocketHandler : public NetworkTCPSocketHandler {
protected:
bool ReceiveInvalidPacket(PacketTurnType type);
/**
* TURN server was unable to connect the client or server based on the
* token. Most likely cause is an invalid token or the other side that
* hasn't connected in a reasonable amount of time.
*
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_TURN_ERROR(Packet *p);
/**
* Client or servers wants to connect to the TURN server (on request by
* the Game Coordinator).
*
* uint8 Game Coordinator protocol version.
* string Token to track the current TURN request.
*
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_SERCLI_CONNECT(Packet *p);
/**
* TURN server has connected client and server together and will now relay
* all packets to each other. No further TURN packets should be send over
* this socket, and the socket should be handed over to the game protocol.
*
* string Hostname of the peer. This can be used to check if a client is not banned etc.
*
* @param p The packet that was just received.
* @return True upon success, otherwise false.
*/
virtual bool Receive_TURN_CONNECTED(Packet *p);
bool HandlePacket(Packet *p);
public:
/**
* Create a new cs socket handler for a given cs.
* @param s the socket we are connected with.
* @param address IP etc. of the client.
*/
NetworkTurnSocketHandler(SOCKET s = INVALID_SOCKET) : NetworkTCPSocketHandler(s) {}
bool ReceivePackets();
};
#endif /* NETWORK_CORE_TCP_TURN_H */
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