260 lines
5.6 KiB
C++
260 lines
5.6 KiB
C++
/* Copyright (C) 2017 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "NetSession.h"
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#include "NetClient.h"
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#include "NetServer.h"
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#include "NetMessage.h"
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#include "NetStats.h"
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#include "lib/external_libraries/enet.h"
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#include "ps/CLogger.h"
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#include "ps/Profile.h"
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#include "scriptinterface/ScriptInterface.h"
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const u32 NETWORK_WARNING_TIMEOUT = 2000;
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const u32 MAXIMUM_HOST_TIMEOUT = std::numeric_limits<u32>::max();
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static const int CHANNEL_COUNT = 1;
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CNetClientSession::CNetClientSession(CNetClient& client) :
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m_Client(client), m_FileTransferer(this), m_Host(NULL), m_Server(NULL), m_Stats(NULL)
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{
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}
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CNetClientSession::~CNetClientSession()
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{
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delete m_Stats;
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if (m_Host && m_Server)
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{
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// Disconnect immediately (we can't wait for acks)
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enet_peer_disconnect_now(m_Server, NDR_SERVER_SHUTDOWN);
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enet_host_destroy(m_Host);
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m_Host = NULL;
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m_Server = NULL;
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}
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}
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bool CNetClientSession::Connect(const CStr& server, const u16 port, const bool isLocalClient)
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{
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ENSURE(!m_Host);
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ENSURE(!m_Server);
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// Create ENet host
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ENetHost* host = enet_host_create(NULL, 1, CHANNEL_COUNT, 0, 0);
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if (!host)
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return false;
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// Bind to specified host
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ENetAddress addr;
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addr.port = port;
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if (enet_address_set_host(&addr, server.c_str()) < 0)
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return false;
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// Initiate connection to server
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ENetPeer* peer = enet_host_connect(host, &addr, CHANNEL_COUNT, 0);
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if (!peer)
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return false;
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m_Host = host;
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m_Server = peer;
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// Prevent the local client of the host from timing out too quickly.
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#if (ENET_VERSION >= ENET_VERSION_CREATE(1, 3, 4))
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if (isLocalClient)
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enet_peer_timeout(peer, 1, MAXIMUM_HOST_TIMEOUT, MAXIMUM_HOST_TIMEOUT);
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#endif
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m_Stats = new CNetStatsTable(m_Server);
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if (CProfileViewer::IsInitialised())
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g_ProfileViewer.AddRootTable(m_Stats);
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return true;
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}
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void CNetClientSession::Disconnect(u32 reason)
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{
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ENSURE(m_Host && m_Server);
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// TODO: ought to do reliable async disconnects, probably
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enet_peer_disconnect_now(m_Server, reason);
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enet_host_destroy(m_Host);
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m_Host = NULL;
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m_Server = NULL;
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SAFE_DELETE(m_Stats);
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}
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void CNetClientSession::Poll()
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{
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PROFILE3("net client poll");
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ENSURE(m_Host && m_Server);
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m_FileTransferer.Poll();
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ENetEvent event;
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while (enet_host_service(m_Host, &event, 0) > 0)
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{
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switch (event.type)
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{
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case ENET_EVENT_TYPE_CONNECT:
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{
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ENSURE(event.peer == m_Server);
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// Report the server address
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char hostname[256] = "(error)";
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enet_address_get_host_ip(&event.peer->address, hostname, ARRAY_SIZE(hostname));
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LOGMESSAGE("Net client: Connected to %s:%u", hostname, (unsigned int)event.peer->address.port);
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m_Client.HandleConnect();
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break;
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}
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case ENET_EVENT_TYPE_DISCONNECT:
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{
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ENSURE(event.peer == m_Server);
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LOGMESSAGE("Net client: Disconnected");
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m_Client.HandleDisconnect(event.data);
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return;
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}
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case ENET_EVENT_TYPE_RECEIVE:
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{
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CNetMessage* msg = CNetMessageFactory::CreateMessage(event.packet->data, event.packet->dataLength, m_Client.GetScriptInterface());
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if (msg)
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{
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LOGMESSAGE("Net client: Received message %s of size %lu from server", msg->ToString().c_str(), (unsigned long)msg->GetSerializedLength());
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m_Client.HandleMessage(msg);
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delete msg;
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}
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enet_packet_destroy(event.packet);
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break;
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}
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case ENET_EVENT_TYPE_NONE:
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break;
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}
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}
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}
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void CNetClientSession::Flush()
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{
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PROFILE3("net client flush");
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ENSURE(m_Host && m_Server);
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enet_host_flush(m_Host);
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}
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bool CNetClientSession::SendMessage(const CNetMessage* message)
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{
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ENSURE(m_Host && m_Server);
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return CNetHost::SendMessage(message, m_Server, "server");
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}
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u32 CNetClientSession::GetLastReceivedTime() const
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{
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if (!m_Server)
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return 0;
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return enet_time_get() - m_Server->lastReceiveTime;
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}
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u32 CNetClientSession::GetMeanRTT() const
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{
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if (!m_Server)
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return 0;
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return m_Server->roundTripTime;
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}
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CNetServerSession::CNetServerSession(CNetServerWorker& server, ENetPeer* peer) :
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m_Server(server), m_FileTransferer(this), m_Peer(peer)
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{
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}
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u32 CNetServerSession::GetIPAddress() const
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{
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return m_Peer->address.host;
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}
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u32 CNetServerSession::GetLastReceivedTime() const
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{
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if (!m_Peer)
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return 0;
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return enet_time_get() - m_Peer->lastReceiveTime;
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}
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u32 CNetServerSession::GetMeanRTT() const
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{
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if (!m_Peer)
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return 0;
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return m_Peer->roundTripTime;
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}
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void CNetServerSession::Disconnect(u32 reason)
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{
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Update((uint)NMT_CONNECTION_LOST, NULL);
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enet_peer_disconnect(m_Peer, reason);
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}
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void CNetServerSession::DisconnectNow(u32 reason)
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{
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enet_peer_disconnect_now(m_Peer, reason);
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}
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bool CNetServerSession::SendMessage(const CNetMessage* message)
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{
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return m_Server.SendMessage(m_Peer, message);
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}
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bool CNetServerSession::IsLocalClient() const
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{
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return m_IsLocalClient;
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}
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void CNetServerSession::SetLocalClient(bool isLocalClient)
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{
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m_IsLocalClient = isLocalClient;
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if (!isLocalClient)
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return;
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// Prevent the local client of the host from timing out too quickly
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#if (ENET_VERSION >= ENET_VERSION_CREATE(1, 3, 4))
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enet_peer_timeout(m_Peer, 0, MAXIMUM_HOST_TIMEOUT, MAXIMUM_HOST_TIMEOUT);
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#endif
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}
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