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/*
Minetest
Copyright (C) 2013-2017 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2017 celeron55, Loic Blot <loic.blot@unix-experience.fr>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <cassert>
#include "threading/thread.h"
#include "connection.h"
namespace con
{
class Connection;
class ConnectionSendThread : public Thread
{
public:
friend class UDPPeer;
ConnectionSendThread(unsigned int max_packet_size, float timeout);
void *run();
void Trigger();
void setParent(Connection *parent)
{
assert(parent != NULL); // Pre-condition
m_connection = parent;
}
void setPeerTimeout(float peer_timeout) { m_timeout = peer_timeout; }
private:
void runTimeouts(float dtime);
void rawSend(const BufferedPacket &packet);
bool rawSendAsPacket(session_t peer_id, u8 channelnum,
const SharedBuffer<u8> &data, bool reliable);
void processReliableCommand(ConnectionCommand &c);
void processNonReliableCommand(ConnectionCommand &c);
void serve(Address bind_address);
void connect(Address address);
void disconnect();
void disconnect_peer(session_t peer_id);
void send(session_t peer_id, u8 channelnum, const SharedBuffer<u8> &data);
void sendReliable(ConnectionCommand &c);
void sendToAll(u8 channelnum, const SharedBuffer<u8> &data);
void sendToAllReliable(ConnectionCommand &c);
void sendPackets(float dtime);
void sendAsPacket(session_t peer_id, u8 channelnum, const SharedBuffer<u8> &data,
bool ack = false);
void sendAsPacketReliable(BufferedPacket &p, Channel *channel);
bool packetsQueued();
Connection *m_connection = nullptr;
unsigned int m_max_packet_size;
float m_timeout;
std::queue<OutgoingPacket> m_outgoing_queue;
Semaphore m_send_sleep_semaphore;
unsigned int m_iteration_packets_avaialble;
unsigned int m_max_commands_per_iteration = 1;
unsigned int m_max_data_packets_per_iteration;
unsigned int m_max_packets_requeued = 256;
};
class ConnectionReceiveThread : public Thread
{
public:
ConnectionReceiveThread(unsigned int max_packet_size);
void *run();
void setParent(Connection *parent)
{
assert(parent); // Pre-condition
m_connection = parent;
}
private:
void receive(SharedBuffer<u8> &packetdata, bool &packet_queued);
// Returns next data from a buffer if possible
// If found, returns true; if not, false.
// If found, sets peer_id and dst
bool getFromBuffers(session_t &peer_id, SharedBuffer<u8> &dst);
bool checkIncomingBuffers(
Channel *channel, session_t &peer_id, SharedBuffer<u8> &dst);
/*
Processes a packet with the basic header stripped out.
Parameters:
packetdata: Data in packet (with no base headers)
peer_id: peer id of the sender of the packet in question
channelnum: channel on which the packet was sent
reliable: true if recursing into a reliable packet
*/
SharedBuffer<u8> processPacket(Channel *channel,
const SharedBuffer<u8> &packetdata, session_t peer_id,
u8 channelnum, bool reliable);
SharedBuffer<u8> handlePacketType_Control(Channel *channel,
const SharedBuffer<u8> &packetdata, Peer *peer, u8 channelnum,
bool reliable);
SharedBuffer<u8> handlePacketType_Original(Channel *channel,
const SharedBuffer<u8> &packetdata, Peer *peer, u8 channelnum,
bool reliable);
SharedBuffer<u8> handlePacketType_Split(Channel *channel,
const SharedBuffer<u8> &packetdata, Peer *peer, u8 channelnum,
bool reliable);
SharedBuffer<u8> handlePacketType_Reliable(Channel *channel,
const SharedBuffer<u8> &packetdata, Peer *peer, u8 channelnum,
bool reliable);
struct PacketTypeHandler
{
SharedBuffer<u8> (ConnectionReceiveThread::*handler)(Channel *channel,
const SharedBuffer<u8> &packet, Peer *peer, u8 channelnum,
bool reliable);
};
static const PacketTypeHandler packetTypeRouter[PACKET_TYPE_MAX];
Connection *m_connection = nullptr;
};
}
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