327 lines
8.8 KiB
C#
327 lines
8.8 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see LICENSE.
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*/
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Net;
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using System.Net.Sockets;
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using System.Threading;
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using OpenRA.FileFormats;
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using OpenRA.GameRules;
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using OpenRA.Network;
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namespace OpenRA.Server
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{
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public class Server
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{
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public List<Connection> conns = new List<Connection>();
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TcpListener listener = null;
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Dictionary<int, List<Connection>> inFlightFrames
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= new Dictionary<int, List<Connection>>();
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TypeDictionary ServerTraits = new TypeDictionary();
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public Session lobbyInfo;
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public bool GameStarted = false;
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public string Name;
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int randomSeed;
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public ModData ModData;
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public Map Map;
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public void Shutdown()
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{
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conns.Clear();
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GameStarted = false;
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foreach (var t in ServerTraits.WithInterface<INotifyServerShutdown>())
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t.ServerShutdown(this);
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try { listener.Stop(); }
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catch { }
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}
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public Server(ModData modData, Settings settings, string map)
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{
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Log.AddChannel("server", "server.log");
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listener = new TcpListener(IPAddress.Any, settings.Server.ListenPort);
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Name = settings.Server.Name;
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randomSeed = (int)DateTime.Now.ToBinary();
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ModData = modData;
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foreach (var trait in modData.Manifest.ServerTraits)
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ServerTraits.Add( modData.ObjectCreator.CreateObject<ServerTrait>(trait) );
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lobbyInfo = new Session( settings.Game.Mods );
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lobbyInfo.GlobalSettings.RandomSeed = randomSeed;
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lobbyInfo.GlobalSettings.Map = map;
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lobbyInfo.GlobalSettings.AllowCheats = settings.Server.AllowCheats;
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lobbyInfo.GlobalSettings.ServerName = settings.Server.Name;
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foreach (var t in ServerTraits.WithInterface<INotifyServerStart>())
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t.ServerStarted(this);
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Log.Write("server", "Initial mods: ");
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foreach( var m in lobbyInfo.GlobalSettings.Mods )
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Log.Write("server","- {0}", m);
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Log.Write("server", "Initial map: {0}",lobbyInfo.GlobalSettings.Map);
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try
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{
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listener.Start();
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}
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catch (Exception)
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{
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throw new InvalidOperationException( "Unable to start server: port is already in use" );
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}
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new Thread( _ =>
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{
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var timeout = ServerTraits.WithInterface<ITick>().Min(t => t.TickTimeout);
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for( ; ; )
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{
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var checkRead = new ArrayList();
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checkRead.Add( listener.Server );
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foreach( var c in conns ) checkRead.Add( c.socket );
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Socket.Select( checkRead, null, null, timeout );
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foreach( Socket s in checkRead )
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if( s == listener.Server ) AcceptConnection();
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else if (conns.Count > 0) conns.Single( c => c.socket == s ).ReadData( this );
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foreach (var t in ServerTraits.WithInterface<ITick>())
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t.Tick(this);
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if (conns.Count() == 0)
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{
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listener.Stop();
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GameStarted = false;
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break;
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}
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}
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} ) { IsBackground = true }.Start();
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}
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/* lobby rework todo:
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* - "teams together" option for team games -- will eliminate most need
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* for manual spawnpoint choosing.
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* - 256 max players is a dirty hack
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*/
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int ChooseFreePlayerIndex()
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{
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for (var i = 0; i < 256; i++)
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if (conns.All(c => c.PlayerIndex != i))
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return i;
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throw new InvalidOperationException("Already got 256 players");
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}
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void AcceptConnection()
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{
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Socket newSocket = null;
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try
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{
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if (!listener.Server.IsBound) return;
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newSocket = listener.AcceptSocket();
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}catch
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{
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/* could have an exception here when listener 'goes away' when calling AcceptConnection! */
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/* alternative would be to use locking but the listener doesnt go away without a reason */
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return;
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}
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var newConn = new Connection { socket = newSocket };
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try
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{
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if (GameStarted)
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{
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Log.Write("server", "Rejected connection from {0}; game is already started.",
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newConn.socket.RemoteEndPoint);
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newConn.socket.Close();
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return;
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}
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newConn.socket.Blocking = false;
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newConn.socket.NoDelay = true;
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// assign the player number.
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newConn.PlayerIndex = ChooseFreePlayerIndex();
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newConn.socket.Send(BitConverter.GetBytes(ProtocolVersion.Version));
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newConn.socket.Send(BitConverter.GetBytes(newConn.PlayerIndex));
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conns.Add(newConn);
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foreach (var t in ServerTraits.WithInterface<IClientJoined>())
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t.ClientJoined(this, newConn);
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}
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catch (Exception e) { DropClient(newConn); }
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}
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public void UpdateInFlightFrames(Connection conn)
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{
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if (conn.Frame == 0)
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return;
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if (!inFlightFrames.ContainsKey(conn.Frame))
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inFlightFrames[conn.Frame] = new List<Connection> { conn };
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else
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inFlightFrames[conn.Frame].Add(conn);
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if (conns.All(c => inFlightFrames[conn.Frame].Contains(c)))
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inFlightFrames.Remove(conn.Frame);
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}
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void DispatchOrdersToClient(Connection c, int client, int frame, byte[] data)
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{
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try
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{
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var ms = new MemoryStream();
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ms.Write( BitConverter.GetBytes( data.Length + 4 ) );
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ms.Write( BitConverter.GetBytes( client ) );
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ms.Write( BitConverter.GetBytes( frame ) );
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ms.Write( data );
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c.socket.Send( ms.ToArray() );
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}
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catch (Exception e) { DropClient(c); }
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}
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public void DispatchOrders(Connection conn, int frame, byte[] data)
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{
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if (frame == 0 && conn != null)
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InterpretServerOrders(conn, data);
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else
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{
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var from = conn != null ? conn.PlayerIndex : 0;
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foreach (var c in conns.Except(conn).ToArray())
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DispatchOrdersToClient(c, from, frame, data);
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}
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}
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void InterpretServerOrders(Connection conn, byte[] data)
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{
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var ms = new MemoryStream(data);
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var br = new BinaryReader(ms);
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try
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{
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for (; ; )
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{
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var so = ServerOrder.Deserialize(br);
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if (so == null) return;
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InterpretServerOrder(conn, so);
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}
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}
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catch (EndOfStreamException) { }
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catch (NotImplementedException) { }
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}
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public void SendChatTo(Connection conn, string text)
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{
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DispatchOrdersToClient(conn, 0, 0,
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new ServerOrder("Chat", text).Serialize());
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}
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public void SendChat(Connection asConn, string text)
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{
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DispatchOrders(asConn, 0, new ServerOrder("Chat", text).Serialize());
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}
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public void SendDisconnected(Connection asConn)
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{
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DispatchOrders(asConn, 0, new ServerOrder("Disconnected", "").Serialize());
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}
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void InterpretServerOrder(Connection conn, ServerOrder so)
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{
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switch (so.Name)
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{
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case "Command":
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{
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bool handled = false;
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foreach (var t in ServerTraits.WithInterface<IInterpretCommand>())
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if ((handled = t.InterpretCommand(this, conn, GetClient(conn), so.Data)))
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break;
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if (!handled)
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{
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Log.Write("server", "Unknown server command: {0}", so.Data);
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SendChatTo(conn, "Unknown server command: {0}".F(so.Data));
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}
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}
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break;
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case "Chat":
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case "TeamChat":
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var fromClient = GetClient(conn);
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var fromIndex = fromClient != null ? fromClient.Index : 0;
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foreach (var c in conns.Except(conn).ToArray())
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DispatchOrdersToClient(c, fromIndex, 0, so.Serialize());
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break;
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}
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}
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public Session.Client GetClient(Connection conn)
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{
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return lobbyInfo.ClientWithIndex(conn.PlayerIndex);
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}
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public void DropClient(Connection toDrop)
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{
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conns.Remove(toDrop);
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SendChat(toDrop, "Connection Dropped");
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if (GameStarted)
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SendDisconnected(toDrop); /* Report disconnection */
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lobbyInfo.Clients.RemoveAll(c => c.Index == toDrop.PlayerIndex);
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DispatchOrders( toDrop, toDrop.MostRecentFrame, new byte[] { 0xbf } );
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if (conns.Count != 0)
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SyncLobbyInfo();
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try
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{
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toDrop.socket.Disconnect(false);
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}
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catch { }
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}
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public void SyncLobbyInfo()
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{
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if (!GameStarted) /* don't do this while the game is running, it breaks things. */
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DispatchOrders(null, 0,
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new ServerOrder("SyncInfo", lobbyInfo.Serialize()).Serialize());
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foreach (var t in ServerTraits.WithInterface<INotifySyncLobbyInfo>())
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t.LobbyInfoSynced(this);
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}
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public void StartGame()
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{
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GameStarted = true;
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foreach( var c in conns )
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foreach( var d in conns )
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DispatchOrdersToClient( c, d.PlayerIndex, 0x7FFFFFFF, new byte[] { 0xBF } );
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DispatchOrders(null, 0,
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new ServerOrder("StartGame", "").Serialize());
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foreach (var t in ServerTraits.WithInterface<IStartGame>())
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t.GameStarted(this);
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}
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}
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}
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