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UDPSocket.cpp
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UDPSocket.cpp
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//
// Created by Neirokan on 30.04.2020
//
#include "UDPSocket.h"
#include "Time.h"
#include "settings.h"
#include <algorithm>
UDPSocket::UDPSocket() : _ownId(0), _nextRelyMsgId(0)
{
_socket.setBlocking(false);
}
void UDPSocket::addConnection(sf::Uint16 id, sf::IpAddress ip, sf::Uint16 port)
{
_connections.insert({ id, UDPConnection(id, ip, port) });
}
void UDPSocket::removeConnection(sf::Uint16 id)
{
_connections.erase(id);
}
bool UDPSocket::bind(sf::Uint16 port)
{
bool result = _socket.bind(port) == sf::Socket::Status::Done;
return result;
}
void UDPSocket::unbind()
{
sf::Packet packet;
packet << MsgType::Disconnect << _ownId;
for (auto it = _connections.begin(); it != _connections.end();)
{
send(packet, it->first);
_connections.erase(it++);
}
_relyPackets.clear();
_confirmTimes.clear();
_socket.unbind();
setId(0);
}
void UDPSocket::setTimeoutCallback(std::function<bool(sf::Uint16)> callback)
{
_timeoutCallback = std::move(callback);
}
void UDPSocket::clearTimeoutCallback()
{
_timeoutCallback = nullptr;
}
void UDPSocket::setId(sf::Uint16 id)
{
_ownId = id;
}
sf::Uint16 UDPSocket::ownId() const
{
return _ownId;
}
sf::Uint16 UDPSocket::serverId() const
{
return _serverId;
}
void UDPSocket::sendRely(sf::Packet& packet, sf::IpAddress& ip, sf::Uint16 port)
{
sf::Packet finalPacket;
finalPacket << _ownId << true << _nextRelyMsgId;
finalPacket.append(packet.getData(), packet.getDataSize());
_relyPackets.insert({ _nextRelyMsgId++, ReliableMsg(finalPacket, ip, port) });
}
void UDPSocket::sendRely(sf::Packet& packet, sf::Uint16 id)
{
if (!_connections.count(id))
return;
sf::Packet finalPacket;
finalPacket << _ownId << true << _nextRelyMsgId;
finalPacket.append(packet.getData(), packet.getDataSize());
_relyPackets.insert({ _nextRelyMsgId++, ReliableMsg(finalPacket, _connections.at(id).ip(), _connections.at(id).port()) });
}
void UDPSocket::update()
{
for (auto it = _connections.begin(); it != _connections.end();)
{
if (!it->second.timeout())
++it;
else
{
if (_timeoutCallback && !_timeoutCallback(it->first))
return;
_connections.erase(it++);
}
}
for (auto it = _relyPackets.begin(); it != _relyPackets.end();)
{
if (!it->second.trySend(_socket))
_relyPackets.erase(it++);
else
++it;
}
for (auto it = _confirmTimes.begin(); it != _confirmTimes.end();)
{
if (Time::time() - it->second > TIMEOUT_SECONDS)
_confirmTimes.erase(it++);
else
++it;
}
}
void UDPSocket::send(sf::Packet& packet, sf::IpAddress& ip, sf::Uint16 port)
{
sf::Packet finalPacket;
finalPacket << _ownId << false << _serverId;
finalPacket.append(packet.getData(), packet.getDataSize());
_socket.send(finalPacket, ip, port);
}
void UDPSocket::send(sf::Packet& packet, sf::Uint16 id)
{
if (!_connections.count(id))
return;
sf::Packet finalPacket;
finalPacket << _ownId << false << _serverId;
finalPacket.append(packet.getData(), packet.getDataSize());
_connections.at(id).send(_socket, finalPacket);
}
MsgType UDPSocket::receive(sf::Packet& packet, sf::Uint16& senderId)
{
// Receive message
sf::IpAddress ip;
sf::Uint16 port;
packet.clear();
if (_socket.receive(packet, ip, port) != sf::Socket::Status::Done)
return MsgType::None;
// Read header
bool reply = false;
sf::Uint16 msgId = 0;
MsgType type;
senderId = 0;
if (!(packet >> senderId >> reply >> msgId >> type))
{
return MsgType::Fake;
}
if (_connections.count(senderId))
_connections.at(senderId).update();
if (type == MsgType::Confirm)
{
_relyPackets.erase(msgId);
return MsgType::Confirm;
}
if (type == MsgType::Connect)
{
sf::Uint32 version = 0;
if (!(packet >> version) || version != NETWORK_VERSION)
return MsgType::Fake;
sf::Uint16 tmp;
for (tmp = 64; tmp >= 1; tmp--)
{
if (!_connections.count(tmp))
senderId = tmp;
else
if (_connections.at(tmp).same(ip, port))
break;
}
if (tmp == 0)
_connections.insert({ senderId, UDPConnection(senderId, ip, port) });
else
return MsgType::Fake;
}
if (!_connections.count(senderId) || !_connections.at(senderId).same(ip, port) || reply && confirmed(msgId, senderId))
return MsgType::Fake;
return type;
}
bool UDPSocket::confirmed(sf::Uint16 msgId, sf::Uint16 senderId)
{
sf::Packet confirmPacket;
confirmPacket << _ownId << false << msgId << MsgType::Confirm;
_connections.at(senderId).send(_socket, confirmPacket);
sf::Uint32 confirmId;
confirmId = (senderId << 16) | msgId;
bool repeat = _confirmTimes.count(confirmId);
_confirmTimes[confirmId] = Time::time();
return repeat;
}