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71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/**
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* @file tcp_turn.cpp Basic functions to receive and send TURN packets.
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*/
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#include "../../stdafx.h"
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#include "../../date_func.h"
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#include "../../debug.h"
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#include "tcp_turn.h"
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#include "../../safeguards.h"
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/**
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* Handle the given packet, i.e. pass it to the right
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* parser receive command.
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* @param p the packet to handle
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* @return true if we should immediately handle further packets, false otherwise
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*/
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bool NetworkTurnSocketHandler::HandlePacket(Packet &p)
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{
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PacketTurnType type = (PacketTurnType)p.Recv_uint8();
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switch (type) {
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case PACKET_TURN_TURN_ERROR: return this->Receive_TURN_ERROR(p);
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case PACKET_TURN_SERCLI_CONNECT: return this->Receive_SERCLI_CONNECT(p);
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case PACKET_TURN_TURN_CONNECTED: return this->Receive_TURN_CONNECTED(p);
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default:
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DEBUG(net, 0, "[tcp/turn] Received invalid packet type %u", type);
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return false;
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}
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}
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/**
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* Receive a packet at TCP level
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* @return Whether at least one packet was received.
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*/
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bool NetworkTurnSocketHandler::ReceivePackets()
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{
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std::unique_ptr<Packet> p;
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static const int MAX_PACKETS_TO_RECEIVE = 4;
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int i = MAX_PACKETS_TO_RECEIVE;
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while (--i != 0 && (p = this->ReceivePacket()) != nullptr) {
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bool cont = this->HandlePacket(*p);
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if (!cont) return true;
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}
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return i != MAX_PACKETS_TO_RECEIVE - 1;
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}
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/**
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* Helper for logging receiving invalid packets.
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* @param type The received packet type.
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* @return Always false, as it's an error.
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*/
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bool NetworkTurnSocketHandler::ReceiveInvalidPacket(PacketTurnType type)
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{
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DEBUG(net, 0, "[tcp/turn] Received illegal packet type %u", type);
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return false;
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}
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bool NetworkTurnSocketHandler::Receive_TURN_ERROR(Packet &) { return this->ReceiveInvalidPacket(PACKET_TURN_TURN_ERROR); }
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bool NetworkTurnSocketHandler::Receive_SERCLI_CONNECT(Packet &) { return this->ReceiveInvalidPacket(PACKET_TURN_SERCLI_CONNECT); }
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bool NetworkTurnSocketHandler::Receive_TURN_CONNECTED(Packet &) { return this->ReceiveInvalidPacket(PACKET_TURN_TURN_CONNECTED); }
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