454 lines
13 KiB
C#
454 lines
13 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.Drawing;
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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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using OpenRA.Server.Traits;
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namespace OpenRA.Server
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{
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static class Server
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{
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public static List<Connection> conns = new List<Connection>();
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static TcpListener listener = null;
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static Dictionary<int, List<Connection>> inFlightFrames
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= new Dictionary<int, List<Connection>>();
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static TypeDictionary ServerTraits = new TypeDictionary();
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public static Session lobbyInfo;
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public static bool GameStarted = false;
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static string Name;
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static int ExternalPort;
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static int randomSeed;
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const int DownloadChunkInterval = 20000;
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const int DownloadChunkSize = 16384;
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const int MasterPingInterval = 60 * 3; // 3 minutes. server has a 5 minute TTL for games, so give ourselves a bit
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// of leeway.
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public static int MaxSpectators = 4; // How many spectators to allow // @todo Expose this as an option
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static int lastPing = 0;
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static bool isInternetServer;
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static string masterServerUrl;
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static bool isInitialPing;
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static ModData ModData;
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public static Map Map;
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public static void StopListening()
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{
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conns.Clear();
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GameStarted = false;
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try { listener.Stop(); }
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catch { }
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}
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public static void ServerMain(ModData modData, Settings settings, string map)
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{
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Log.AddChannel("server", "server.log");
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ServerTraits.Add( new DebugServerTrait() );
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ServerTraits.Add( new PlayerCommands() );
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ServerTraits.Add( new LobbyCommands() );
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isInitialPing = true;
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Server.masterServerUrl = settings.Server.MasterServer;
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isInternetServer = settings.Server.AdvertiseOnline;
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listener = new TcpListener(IPAddress.Any, settings.Server.ListenPort);
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Name = settings.Server.Name;
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ExternalPort = settings.Server.ExternalPort;
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randomSeed = (int)DateTime.Now.ToBinary();
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ModData = modData;
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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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LoadMap(); // populates the Session's slots, too.
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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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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, MasterPingInterval * 10000 );
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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();
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if (Environment.TickCount - lastPing > MasterPingInterval * 1000)
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PingMasterServer();
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else
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lock (masterServerMessages)
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while (masterServerMessages.Count > 0)
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SendChat(null, masterServerMessages.Dequeue());
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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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static Session.Slot MakeSlotFromPlayerReference(PlayerReference pr)
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{
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if (!pr.Playable) return null;
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return new Session.Slot
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{
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MapPlayer = pr.Name,
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Bot = null, /* todo: allow the map to specify a bot class? */
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Closed = false,
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};
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}
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public static void LoadMap()
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{
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Map = new Map(ModData.AvailableMaps[lobbyInfo.GlobalSettings.Map]);
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lobbyInfo.Slots = Map.Players
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.Select(p => MakeSlotFromPlayerReference(p.Value))
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.Where(s => s != null)
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.Select((s, i) => { s.Index = i; return s; })
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.ToList();
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// Generate slots for spectators
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for (int i = 0; i < MaxSpectators; i++)
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lobbyInfo.Slots.Add(new Session.Slot
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{
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Spectator = true,
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Index = lobbyInfo.Slots.Count(),
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MapPlayer = null,
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Bot = null
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});
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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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static 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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static int ChooseFreeSlot()
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{
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return lobbyInfo.Slots.First(s => !s.Closed && s.Bot == null
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&& !lobbyInfo.Clients.Any( c => c.Slot == s.Index )).Index;
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}
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static 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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var defaults = new GameRules.PlayerSettings();
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var client = new Session.Client()
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{
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Index = newConn.PlayerIndex,
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Color1 = defaults.Color1,
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Color2 = defaults.Color2,
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Name = defaults.Name,
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Country = "random",
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State = Session.ClientState.NotReady,
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SpawnPoint = 0,
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Team = 0,
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Slot = ChooseFreeSlot(),
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};
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var slotData = lobbyInfo.Slots.FirstOrDefault( x => x.Index == client.Slot );
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if (slotData != null)
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SyncClientToPlayerReference(client, Map.Players[slotData.MapPlayer]);
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lobbyInfo.Clients.Add(client);
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Log.Write("server", "Client {0}: Accepted connection from {1}",
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newConn.PlayerIndex, newConn.socket.RemoteEndPoint);
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SendChat(newConn, "has joined the game.");
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SyncLobbyInfo();
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}
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catch (Exception e) { DropClient(newConn, e); }
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}
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public static void UpdateInFlightFrames(Connection conn)
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{
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if (conn.Frame != 0)
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{
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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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{
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inFlightFrames.Remove(conn.Frame);
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}
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}
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}
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public static 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, e ); }
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}
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public static 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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static 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 static void SyncClientToPlayerReference(Session.Client c, PlayerReference pr)
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{
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if (pr == null)
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return;
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if (pr.LockColor)
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{
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c.Color1 = pr.Color;
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c.Color2 = pr.Color2;
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}
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if (pr.LockRace)
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c.Country = pr.Race;
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}
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public static 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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static 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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static 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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static 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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if (GameStarted)
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SendChatTo(conn, "Cannot change state when game started. ({0})".F(so.Data));
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else if (GetClient(conn).State == Session.ClientState.Ready && !(so.Data == "ready" || so.Data == "startgame"))
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SendChatTo(conn, "Cannot change state when marked as ready.");
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else
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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(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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}
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break;
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case "Chat":
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case "TeamChat":
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foreach (var c in conns.Except(conn).ToArray())
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DispatchOrdersToClient(c, GetClient(conn).Index, 0, so.Serialize());
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break;
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}
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}
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public static Session.Client GetClient(Connection conn)
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{
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return lobbyInfo.Clients.First(c => c.Index == conn.PlayerIndex);
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}
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public static void DropClient(Connection toDrop, Exception e)
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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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}
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public static 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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PingMasterServer();
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}
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static volatile bool isBusy;
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static Queue<string> masterServerMessages = new Queue<string>();
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public static void PingMasterServer()
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{
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if (isBusy || !isInternetServer) return;
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lastPing = Environment.TickCount;
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isBusy = true;
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Action a = () =>
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{
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try
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{
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var url = "ping.php?port={0}&name={1}&state={2}&players={3}&mods={4}&map={5}";
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if (isInitialPing) url += "&new=1";
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using (var wc = new WebClient())
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{
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wc.DownloadData(
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masterServerUrl + url.F(
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ExternalPort, Uri.EscapeUriString(Name),
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GameStarted ? 2 : 1, // todo: post-game states, etc.
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lobbyInfo.Clients.Count,
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string.Join(",", lobbyInfo.GlobalSettings.Mods),
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lobbyInfo.GlobalSettings.Map));
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if (isInitialPing)
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{
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isInitialPing = false;
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lock (masterServerMessages)
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masterServerMessages.Enqueue("Master server communication established.");
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}
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}
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}
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catch(Exception ex)
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{
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Log.Write("server", ex.ToString());
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lock( masterServerMessages )
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masterServerMessages.Enqueue( "Master server communication failed." );
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}
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isBusy = false;
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};
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a.BeginInvoke(null, null);
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}
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}
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}
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