tcp_coordinator.cpp

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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/>.
 */
 
#include "../../stdafx.h"
#include "../../timer/timer_game_calendar.h"
#include "../../debug.h"
#include "tcp_coordinator.h"
 
#include "../../safeguards.h"
 
bool NetworkCoordinatorSocketHandler::HandlePacket(Packet &p)
{
  PacketCoordinatorType type = (PacketCoordinatorType)p.Recv_uint8();
 
  switch (type) {
    case PACKET_COORDINATOR_GC_ERROR:              return this->Receive_GC_ERROR(p);
    case PACKET_COORDINATOR_SERVER_REGISTER:       return this->Receive_SERVER_REGISTER(p);
    case PACKET_COORDINATOR_GC_REGISTER_ACK:       return this->Receive_GC_REGISTER_ACK(p);
    case PACKET_COORDINATOR_SERVER_UPDATE:         return this->Receive_SERVER_UPDATE(p);
    case PACKET_COORDINATOR_CLIENT_LISTING:        return this->Receive_CLIENT_LISTING(p);
    case PACKET_COORDINATOR_GC_LISTING:            return this->Receive_GC_LISTING(p);
    case PACKET_COORDINATOR_CLIENT_CONNECT:        return this->Receive_CLIENT_CONNECT(p);
    case PACKET_COORDINATOR_GC_CONNECTING:         return this->Receive_GC_CONNECTING(p);
    case PACKET_COORDINATOR_SERCLI_CONNECT_FAILED: return this->Receive_SERCLI_CONNECT_FAILED(p);
    case PACKET_COORDINATOR_GC_CONNECT_FAILED:     return this->Receive_GC_CONNECT_FAILED(p);
    case PACKET_COORDINATOR_CLIENT_CONNECTED:      return this->Receive_CLIENT_CONNECTED(p);
    case PACKET_COORDINATOR_GC_DIRECT_CONNECT:     return this->Receive_GC_DIRECT_CONNECT(p);
    case PACKET_COORDINATOR_GC_STUN_REQUEST:       return this->Receive_GC_STUN_REQUEST(p);
    case PACKET_COORDINATOR_SERCLI_STUN_RESULT:    return this->Receive_SERCLI_STUN_RESULT(p);
    case PACKET_COORDINATOR_GC_STUN_CONNECT:       return this->Receive_GC_STUN_CONNECT(p);
    case PACKET_COORDINATOR_GC_NEWGRF_LOOKUP:      return this->Receive_GC_NEWGRF_LOOKUP(p);
    case PACKET_COORDINATOR_GC_TURN_CONNECT:       return this->Receive_GC_TURN_CONNECT(p);
 
    default:
      Debug(net, 0, "[tcp/coordinator] Received invalid packet type {}", type);
      return false;
  }
}
 
bool NetworkCoordinatorSocketHandler::ReceivePackets()
{
  /*
   * We read only a few of the packets. This allows the GUI to update when
   * a large set of servers is being received. Otherwise the interface
   * "hangs" while the game is updating the server-list.
   *
   * What arbitrary number to choose is the ultimate question though.
   */
  std::unique_ptr<Packet> p;
  static const int MAX_PACKETS_TO_RECEIVE = 42;
  int i = MAX_PACKETS_TO_RECEIVE;
  while (--i != 0 && (p = this->ReceivePacket()) != nullptr) {
    bool cont = this->HandlePacket(*p);
    if (!cont) return true;
  }
 
  return i != MAX_PACKETS_TO_RECEIVE - 1;
}
 
bool NetworkCoordinatorSocketHandler::ReceiveInvalidPacket(PacketCoordinatorType type)
{
  Debug(net, 0, "[tcp/coordinator] Received illegal packet type {}", type);
  return false;
}
 
bool NetworkCoordinatorSocketHandler::Receive_GC_ERROR(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_ERROR); }
bool NetworkCoordinatorSocketHandler::Receive_SERVER_REGISTER(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERVER_REGISTER); }
bool NetworkCoordinatorSocketHandler::Receive_GC_REGISTER_ACK(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_REGISTER_ACK); }
bool NetworkCoordinatorSocketHandler::Receive_SERVER_UPDATE(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERVER_UPDATE); }
bool NetworkCoordinatorSocketHandler::Receive_CLIENT_LISTING(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_LISTING); }
bool NetworkCoordinatorSocketHandler::Receive_GC_LISTING(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_LISTING); }
bool NetworkCoordinatorSocketHandler::Receive_CLIENT_CONNECT(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_CONNECT); }
bool NetworkCoordinatorSocketHandler::Receive_GC_CONNECTING(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_CONNECTING); }
bool NetworkCoordinatorSocketHandler::Receive_SERCLI_CONNECT_FAILED(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERCLI_CONNECT_FAILED); }
bool NetworkCoordinatorSocketHandler::Receive_GC_CONNECT_FAILED(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_CONNECT_FAILED); }
bool NetworkCoordinatorSocketHandler::Receive_CLIENT_CONNECTED(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_CONNECTED); }
bool NetworkCoordinatorSocketHandler::Receive_GC_DIRECT_CONNECT(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_DIRECT_CONNECT); }
bool NetworkCoordinatorSocketHandler::Receive_GC_STUN_REQUEST(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_STUN_REQUEST); }
bool NetworkCoordinatorSocketHandler::Receive_SERCLI_STUN_RESULT(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERCLI_STUN_RESULT); }
bool NetworkCoordinatorSocketHandler::Receive_GC_STUN_CONNECT(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_STUN_CONNECT); }
bool NetworkCoordinatorSocketHandler::Receive_GC_NEWGRF_LOOKUP(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_NEWGRF_LOOKUP); }
bool NetworkCoordinatorSocketHandler::Receive_GC_TURN_CONNECT(Packet &) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_TURN_CONNECT); }