574 lines
16 KiB
C#
574 lines
16 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
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* This file is part of OpenRA.
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*
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* OpenRA 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 3 of the License, or
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* (at your option) any later version.
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*
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* OpenRA 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 OpenRA. If not, see <http://www.gnu.org/licenses/>.
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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.Security.Cryptography;
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using System.Threading;
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using OpenRA.FileFormats;
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using System.Text;
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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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static List<Connection> conns = new List<Connection>();
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static TcpListener listener;
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static Dictionary<int, List<Connection>> inFlightFrames
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= new Dictionary<int, List<Connection>>();
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static Session lobbyInfo;
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static bool GameStarted = false;
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static string[] initialMods;
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static string Name;
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static WebClient wc = new WebClient();
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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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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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public static void ServerMain(bool internetServer, string masterServerUrl, string name, int port, int extport, string[] mods, string map)
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{
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isInitialPing = true;
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Server.masterServerUrl = masterServerUrl;
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isInternetServer = internetServer;
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listener = new TcpListener(IPAddress.Any, port);
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initialMods = mods;
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Name = name;
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ExternalPort = extport;
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randomSeed = (int)DateTime.Now.ToBinary();
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lobbyInfo = new Session();
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lobbyInfo.GlobalSettings.Mods = mods;
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lobbyInfo.GlobalSettings.RandomSeed = randomSeed;
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lobbyInfo.GlobalSettings.Map = map;
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Console.WriteLine("Initial mods: ");
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foreach( var m in lobbyInfo.GlobalSettings.Mods )
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Console.WriteLine("- {0}", m);
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Console.WriteLine("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 * 1000000 );
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foreach( Socket s in checkRead )
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if( s == listener.Server ) AcceptConnection();
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else 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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}
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} ) { IsBackground = true }.Start();
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}
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static int ChooseFreePlayerIndex()
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{
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for (var i = 0; i < 8; 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 8 players");
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}
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static int ChooseFreePalette()
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{
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// TODO: Query the list of palettes from somewhere, and pick one
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return 0;
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}
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static void AcceptConnection()
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{
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var newConn = new Connection { socket = listener.AcceptSocket() };
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try
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{
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if (GameStarted)
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{
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Console.WriteLine("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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lobbyInfo.Clients.Add(
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new Session.Client()
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{
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Index = newConn.PlayerIndex,
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PaletteIndex = ChooseFreePalette(),
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Name = "Player {0}".F(1 + newConn.PlayerIndex),
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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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});
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Console.WriteLine("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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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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}
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static bool InterpretCommand(Connection conn, string cmd)
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{
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var dict = new Dictionary<string, Func<string, bool>>
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{
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{ "ready",
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s =>
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{
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// if we're downloading, we can't ready up.
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var client = GetClient(conn);
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if (client.State == Session.ClientState.NotReady)
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client.State = Session.ClientState.Ready;
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else if (client.State == Session.ClientState.Ready)
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client.State = Session.ClientState.NotReady;
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Console.WriteLine("Player @{0} is {1}",
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conn.socket.RemoteEndPoint, client.State);
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SyncLobbyInfo();
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// start the game if everyone is ready.
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if (conns.Count > 0 && conns.All(c => GetClient(c).State == Session.ClientState.Ready))
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{
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Console.WriteLine("All players are ready. Starting the game!");
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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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PingMasterServer();
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}
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return true;
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}},
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{ "name",
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s =>
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{
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if (GameStarted)
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{
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SendChatTo( conn, "You can't change your name after the game has started" );
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return true;
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}
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if (s.Trim() == "")
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{
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SendChatTo( conn, "Blank names are not permitted." );
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return true;
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}
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Console.WriteLine("Player@{0} is now known as {1}", conn.socket.RemoteEndPoint, s);
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GetClient(conn).Name = s;
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SyncLobbyInfo();
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return true;
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}},
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{ "lag",
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s =>
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{
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int lag;
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if (!int.TryParse(s, out lag)) { Console.WriteLine("Invalid order lag: {0}", s); return false; }
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Console.WriteLine("Order lag is now {0} frames.", lag);
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lobbyInfo.GlobalSettings.OrderLatency = lag;
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SyncLobbyInfo();
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return true;
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}},
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{ "race",
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s =>
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{
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if (GameStarted)
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{
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SendChatTo( conn, "You can't change your race after the game has started" );
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return true;
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}
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GetClient(conn).Country = s;
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SyncLobbyInfo();
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return true;
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}},
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{ "team",
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s =>
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{
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if (GameStarted)
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{
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SendChatTo( conn, "You can't change your team after the game has started" );
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return true;
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}
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int team;
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if (!int.TryParse(s, out team)) { Console.WriteLine("Invalid team: {0}", s ); return false; }
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GetClient(conn).Team = team;
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SyncLobbyInfo();
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return true;
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}},
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{ "spawn",
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s =>
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{
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if (GameStarted)
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{
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SendChatTo( conn, "You can't change your spawn point after the game has started" );
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return true;
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}
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int spawnPoint;
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if (!int.TryParse(s, out spawnPoint) || spawnPoint < 0 || spawnPoint > 8) //TODO: SET properly!
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{
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Console.WriteLine("Invalid spawn point: {0}", s);
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return false;
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}
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if (lobbyInfo.Clients.Where( c => c != GetClient(conn) ).Any( c => (c.SpawnPoint == spawnPoint) && (c.SpawnPoint != 0) ))
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{
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SendChatTo( conn, "You can't be at the same spawn point as another player" );
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return true;
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}
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GetClient(conn).SpawnPoint = spawnPoint;
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SyncLobbyInfo();
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return true;
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}},
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{ "pal",
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s =>
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{
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if (GameStarted)
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{
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SendChatTo( conn, "You can't change your color after the game has started" );
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return true;
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}
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int pali;
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if (!int.TryParse(s, out pali))
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{
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Console.WriteLine("Invalid palette: {0}", s);
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return false;
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}
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if (lobbyInfo.Clients.Where( c => c != GetClient(conn) ).Any( c => c.PaletteIndex == pali ))
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{
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SendChatTo( conn, "You can't be the same color as another player" );
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return true;
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}
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GetClient(conn).PaletteIndex = pali;
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SyncLobbyInfo();
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return true;
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}},
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{ "map",
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s =>
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{
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if (conn.PlayerIndex != 0)
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{
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SendChatTo( conn, "Only the host can change the map" );
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return true;
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}
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if (GameStarted)
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{
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SendChatTo( conn, "You can't change the map after the game has started" );
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return true;
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}
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lobbyInfo.GlobalSettings.Map = s;
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foreach(var client in lobbyInfo.Clients)
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client.SpawnPoint = 0;
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SyncLobbyInfo();
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return true;
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}},
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{ "addpkg",
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s =>
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{
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if (GameStarted)
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{
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SendChatTo( conn, "You can't change packages after the game has started" );
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return true;
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}
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Console.WriteLine("** Added package: `{0}`", s);
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try
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{
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lobbyInfo.GlobalSettings.Packages =
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lobbyInfo.GlobalSettings.Packages.Concat( new string[] {
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MakePackageString(s)}).ToArray();
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SyncLobbyInfo();
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return true;
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}
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catch
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{
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Console.WriteLine("Adding the package failed.");
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SendChatTo( conn, "Adding the package failed." );
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return true;
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}
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}},
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{ "mods",
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s =>
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{
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if (GameStarted)
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{
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SendChatTo( conn, "You can't change mods after the game has started" );
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return true;
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}
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var args = s.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).ToList();
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lobbyInfo.GlobalSettings.Mods = args.GetRange(0,args.Count - 1).ToArray();
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lobbyInfo.GlobalSettings.Map = args.Last();
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SyncLobbyInfo();
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return true;
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}},
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};
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var cmdName = cmd.Split(' ').First();
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var cmdValue = string.Join(" ", cmd.Split(' ').Skip(1).ToArray());
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Func<string,bool> a;
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if (!dict.TryGetValue(cmdName, out a))
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return false;
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Console.WriteLine( "Client {0} sent server command: {1}", conn.PlayerIndex, cmd );
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return a(cmdValue);
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}
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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 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 "Chat":
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if (so.Data.StartsWith("/"))
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{
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if (!InterpretCommand(conn, so.Data.Substring(1)))
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{
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Console.WriteLine("Bad server command: {0}", so.Data.Substring(1));
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SendChatTo(conn, "Bad server command.");
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}
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}
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else
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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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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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Console.WriteLine("Client dropped: {0}.", toDrop.socket.RemoteEndPoint);
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conns.Remove(toDrop);
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SendChat(toDrop, "Connection Dropped");
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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) OnServerEmpty();
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else SyncLobbyInfo();
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}
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static void OnServerEmpty()
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{
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Console.WriteLine("Server emptied out; doing a bit of housekeeping to prepare for next game..");
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inFlightFrames.Clear();
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lobbyInfo = new Session();
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lobbyInfo.GlobalSettings.Mods = initialMods;
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lobbyInfo.GlobalSettings.RandomSeed = randomSeed;
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GameStarted = false;
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}
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static string MakePackageString(string a)
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{
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return "{0}:{1}".F(a, CalculateSHA1(a));
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}
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static string CalculateSHA1(string filename)
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{
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using (var csp = SHA1.Create())
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return new string(csp.ComputeHash(File.ReadAllBytes(filename))
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.SelectMany(a => a.ToString("x2")).ToArray());
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}
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static void SyncLobbyInfo()
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{
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var clientData = lobbyInfo.Clients.ToDictionary(
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a => a.Index.ToString(),
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a => FieldSaver.Save(a));
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clientData["GlobalSettings"] = FieldSaver.Save(lobbyInfo.GlobalSettings);
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DispatchOrders(null, 0,
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new ServerOrder("SyncInfo", clientData.WriteToString()).Serialize());
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PingMasterServer();
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}
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static void PingMasterServer()
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{
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if (wc.IsBusy || !isInternetServer) return;
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var url = "ping.php?port={0}&name={1}&state={2}&players={3}&mods={4}&map={5}";
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wc.DownloadDataCompleted += PingMasterServerResponse;
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if (isInitialPing)
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{
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url += "&new=1";
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isInitialPing = false;
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}
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else
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wc.DownloadDataCompleted -= PingMasterServerResponse;
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wc.DownloadDataAsync(new Uri(
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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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lastPing = Environment.TickCount;
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}
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static void PingMasterServerResponse(object sender, DownloadDataCompletedEventArgs e)
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{
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string s = Encoding.UTF8.GetString(e.Result);
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int gameId;
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if (int.TryParse(s.Trim(), out gameId))
|
|
Game.SetGameId(gameId);
|
|
Log.Write("debug", "Game ID: {0}", gameId);
|
|
}
|
|
}
|
|
}
|