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ForwardThread.cs
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/*
* Starrybound Server
* Copyright 2013, Avilance Ltd
* Created by Zidonuke ([email protected]) and Crashdoom ([email protected])
*
* This file is a part of Starrybound Server.
* Starrybound Server is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
* Starrybound Server is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along with Starrybound Server. If not, see http://www.gnu.org/licenses/.
*/
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using com.avilance.Starrybound.Util;
using com.avilance.Starrybound.Extensions;
using Ionic.Zlib;
using com.avilance.Starrybound.Packets;
using System.Threading;
namespace com.avilance.Starrybound
{
class ForwardThread
{
BinaryReader incoming;
BinaryWriter outgoing;
Client client;
Direction direction;
private string passwordSalt;
public ForwardThread(Client aClient, BinaryReader aInput, BinaryWriter aOutput, Direction aDirection) {
this.client = aClient;
this.incoming = aInput;
this.outgoing = aOutput;
this.direction = aDirection;
}
public void run()
{
try
{
for (;;)
{
if (!this.client.connectionAlive)
{
this.client.forceDisconnect(direction, "Connection no longer alive");
return;
}
if (this.client.kickTargetTimestamp != 0)
{
if (this.client.kickTargetTimestamp < Utils.getTimestamp())
{
this.client.closeConnection();
return;
}
continue;
}
#region Process Packet
//Packet ID and Vaildity Check.
uint temp = this.incoming.ReadVarUInt32();
if (temp < 1 || temp > 48)
{
this.client.forceDisconnect(direction, "Sent invalid packet ID [" + temp + "].");
return;
}
Packet packetID = (Packet)temp;
//Packet Size and Compression Check.
bool compressed = false;
int packetSize = this.incoming.ReadVarInt32();
if (packetSize < 0)
{
packetSize = -packetSize;
compressed = true;
}
//Create buffer for forwarding
byte[] dataBuffer = this.incoming.ReadFully(packetSize);
//Do decompression
MemoryStream ms = new MemoryStream();
if (compressed)
{
ZlibStream compressedStream = new ZlibStream(new MemoryStream(dataBuffer), CompressionMode.Decompress);
byte[] buffer = new byte[32768];
for (;;)
{
int read = compressedStream.Read(buffer, 0, buffer.Length);
if (read <= 0)
break;
ms.Write(buffer, 0, read);
}
ms.Seek(0, SeekOrigin.Begin);
}
else
{
ms = new MemoryStream(dataBuffer);
}
//Create packet parser
BinaryReader packetData = new BinaryReader(ms);
#endregion
//Return data for packet processor
object returnData = true;
if (packetID != Packet.Heartbeat && packetID != Packet.UniverseTimeUpdate)
{
if (direction == Direction.Client)
#region Handle Client Packets
{
#region Protocol State Security
ClientState curState = this.client.state;
if (curState != ClientState.Connected)
{
if (curState == ClientState.PendingConnect && packetID != Packet.ClientConnect)
{
this.client.rejectPreConnected("Violated PendingConnect protocol state with " + packetID);
return;
}
else if (curState == ClientState.PendingAuthentication && packetID != Packet.HandshakeResponse)
{
this.client.rejectPreConnected("Violated PendingAuthentication protocol state with " + packetID);
return;
}
else if (curState == ClientState.PendingConnectResponse)
{
int startTime = Utils.getTimestamp();
while (true)
{
if (this.client.state == ClientState.Connected) break;
if (Utils.getTimestamp() > startTime + StarryboundServer.config.connectTimeout)
{
this.client.rejectPreConnected("Connection Failed: Server did not respond in time.");
return;
}
}
}
}
#endregion
if (packetID == Packet.ChatSend)
{
returnData = new Packet11ChatSend(this.client, packetData, this.direction).onReceive();
}
else if (packetID == Packet.ClientConnect)
{
this.client.state = ClientState.PendingAuthentication;
returnData = new Packet7ClientConnect(this.client, packetData, this.direction).onReceive();
MemoryStream packet = new MemoryStream();
BinaryWriter packetWrite = new BinaryWriter(packet);
passwordSalt = Utils.GenerateSecureSalt();
packetWrite.WriteStarString("");
packetWrite.WriteStarString(passwordSalt);
packetWrite.WriteBE(StarryboundServer.config.passwordRounds);
this.client.sendClientPacket(Packet.HandshakeChallenge, packet.ToArray());
}
else if (packetID == Packet.HandshakeResponse)
{
string claimResponse = packetData.ReadStarString();
string passwordHash = packetData.ReadStarString();
string verifyHash = Utils.StarHashPassword(StarryboundServer.config.proxyPass, this.client.playerData.account + passwordSalt, StarryboundServer.config.passwordRounds);
if (passwordHash != verifyHash)
{
this.client.rejectPreConnected("Your password was incorrect.");
return;
}
this.client.state = ClientState.PendingConnectResponse;
returnData = false;
}
else if (packetID == Packet.WarpCommand)
{
WarpType cmd = (WarpType)packetData.ReadUInt32BE();
WorldCoordinate coord = packetData.ReadStarWorldCoordinate();
string player = packetData.ReadStarString();
if (cmd == WarpType.WarpToPlayerShip)
{
Client target = StarryboundServer.getClient(player);
if (target != null)
{
if (!this.client.playerData.canAccessShip(target.playerData))
{
this.client.sendChatMessage("^#5dc4f4;You cannot access this player's ship due to their ship access settings.");
StarryboundServer.logDebug("ShipAccess", "Preventing " + this.client.playerData.name + " from accessing " + target.playerData.name + "'s ship.");
MemoryStream packetWarp = new MemoryStream();
BinaryWriter packetWrite = new BinaryWriter(packetWarp);
packetWrite.WriteBE((uint)WarpType.WarpToOwnShip);
packetWrite.Write(new WorldCoordinate());
packetWrite.WriteStarString("");
client.sendServerPacket(Packet.WarpCommand, packetWarp.ToArray());
returnData = false;
}
}
}
StarryboundServer.logDebug("WarpCommand", "[" + this.client.playerData.client + "][" + cmd + "]" + (coord != null ? "[" + coord.ToString() + "]" : "") + "[" + player + "]");
}
else if (packetID == Packet.ModifyTileList || packetID == Packet.DamageTileGroup || packetID == Packet.DamageTile || packetID == Packet.ConnectWire || packetID == Packet.DisconnectAllWires)
{
if(!this.client.playerData.canIBuild()) returnData = false;
}
else if (packetID == Packet.EntityCreate)
{
while(true)
{
EntityType type = (EntityType)packetData.Read();
if(type == EntityType.EOF) break;
byte[] entityData = packetData.ReadStarByteArray();
int entityId = packetData.ReadVarInt32();
if(type == EntityType.Projectile)
{
BinaryReader entity = new BinaryReader(new MemoryStream(entityData));
string projectileKey = entity.ReadStarString();
object projParams = entity.ReadStarVariant();
if (StarryboundServer.config.projectileBlacklist.Contains(projectileKey))
{
MemoryStream packet = new MemoryStream();
BinaryWriter packetWrite = new BinaryWriter(packet);
packetWrite.WriteVarInt32(entityId);
packetWrite.Write(false);
this.client.sendClientPacket(Packet.EntityDestroy, packet.ToArray());
returnData = false;
}
if (StarryboundServer.serverConfig.useDefaultWorldCoordinate && StarryboundServer.config.spawnWorldProtection)
{
if (this.client.playerData.loc != null)
{
if (StarryboundServer.config.projectileBlacklistSpawn.Contains(projectileKey) && StarryboundServer.spawnPlanet.Equals(this.client.playerData.loc) && !this.client.playerData.group.hasPermission("admin.spawnbuild") && !this.client.playerData.inPlayerShip)
{
MemoryStream packet = new MemoryStream();
BinaryWriter packetWrite = new BinaryWriter(packet);
packetWrite.WriteVarInt32(entityId);
packetWrite.Write(false);
this.client.sendClientPacket(Packet.EntityDestroy, packet.ToArray());
returnData = false;
}
}
else
{
MemoryStream packet = new MemoryStream();
BinaryWriter packetWrite = new BinaryWriter(packet);
packetWrite.WriteVarInt32(entityId);
packetWrite.Write(false);
this.client.sendClientPacket(Packet.EntityDestroy, packet.ToArray());
returnData = false;
}
}
}
else if (type == EntityType.Object || type == EntityType.Plant || type == EntityType.PlantDrop || type == EntityType.Monster)
{
if (!this.client.playerData.canIBuild())
{
MemoryStream packet = new MemoryStream();
BinaryWriter packetWrite = new BinaryWriter(packet);
packetWrite.WriteVarInt32(entityId);
packetWrite.Write(false);
this.client.sendClientPacket(Packet.EntityDestroy, packet.ToArray());
returnData = false;
}
}
}
}
else if (packetID == Packet.SpawnEntity)
{
while(true)
{
EntityType type = (EntityType)packetData.Read();
if (type == EntityType.EOF) break;
byte[] entityData = packetData.ReadStarByteArray();
if (type == EntityType.Projectile)
{
BinaryReader entity = new BinaryReader(new MemoryStream(entityData));
string projectileKey = entity.ReadStarString();
object projParams = entity.ReadStarVariant();
if (StarryboundServer.config.projectileBlacklist.Contains(projectileKey))
{
returnData = false;
}
if (StarryboundServer.serverConfig.useDefaultWorldCoordinate && StarryboundServer.config.spawnWorldProtection)
{
if (this.client.playerData.loc != null)
{
if (StarryboundServer.config.projectileBlacklistSpawn.Contains(projectileKey) ^ StarryboundServer.config.projectileSpawnListIsWhitelist)
{
if (StarryboundServer.spawnPlanet.Equals(this.client.playerData.loc) && !this.client.playerData.group.hasPermission("admin.spawnbuild") && !this.client.playerData.inPlayerShip)
{
returnData = false;
}
}
}
else
{
returnData = false;
}
}
}
else if (type == EntityType.Object || type == EntityType.Plant || type == EntityType.PlantDrop || type == EntityType.Monster)
{
if (!this.client.playerData.canIBuild()) returnData = false;
}
}
}
}
#endregion
else
#region Handle Server Packets
{
if (packetID == Packet.ChatReceive)
{
returnData = new Packet5ChatReceive(this.client, packetData, this.direction).onReceive();
}
else if (packetID == Packet.ProtocolVersion)
{
uint protocolVersion = packetData.ReadUInt32BE();
if (protocolVersion != StarryboundServer.ProtocolVersion)
{
MemoryStream packet = new MemoryStream();
BinaryWriter packetWrite = new BinaryWriter(packet);
packetWrite.WriteBE(protocolVersion);
this.client.sendClientPacket(Packet.ProtocolVersion, packet.ToArray());
this.client.rejectPreConnected("Connection Failed: Unable to handle parent server protocol version.");
return;
}
}
else if (packetID == Packet.HandshakeChallenge)
{
string claimMessage = packetData.ReadString();
string passwordSalt = packetData.ReadStarString();
int passwordRounds = packetData.ReadInt32BE();
MemoryStream packet = new MemoryStream();
BinaryWriter packetWrite = new BinaryWriter(packet);
string passwordHash = Utils.StarHashPassword(StarryboundServer.privatePassword, passwordSalt, passwordRounds);
packetWrite.WriteStarString("");
packetWrite.WriteStarString(passwordHash);
this.client.sendServerPacket(Packet.HandshakeResponse, packet.ToArray());
returnData = false;
}
else if (packetID == Packet.ConnectResponse)
{
int startTime = Utils.getTimestamp();
while (true)
{
if (this.client.state == ClientState.PendingConnectResponse) break;
if (Utils.getTimestamp() > startTime + StarryboundServer.config.connectTimeout)
{
this.client.rejectPreConnected("Connection Failed: Client did not respond with handshake.");
return;
}
}
returnData = new Packet2ConnectResponse(this.client, packetData, this.direction).onReceive();
}
else if (packetID == Packet.WorldStart)
{
if (!this.client.playerData.sentMotd)
{
this.client.sendChatMessage(Config.GetMotd());
if (!this.client.playerData.group.hasPermission("world.build"))
this.client.sendChatMessage("^#f75d5d;" + StarryboundServer.config.buildErrorMessage);
this.client.playerData.sentMotd = true;
}
byte[] planet = packetData.ReadStarByteArray();
byte[] worldStructure = packetData.ReadStarByteArray();
byte[] sky = packetData.ReadStarByteArray();
byte[] serverWeather = packetData.ReadStarByteArray();
float spawnX = packetData.ReadSingleBE();
float spawnY = packetData.ReadSingleBE();
uint mapParamsSize = packetData.ReadVarUInt32();
Dictionary<string, object> mapParams = new Dictionary<string, object>();
int isPlayerShip = 0;
for (int i = 0; i < mapParamsSize; i++)
{
string key = packetData.ReadStarString();
var value = packetData.ReadStarVariant();
mapParams.Add(key, value);
if(key == "fuel.level")
{
isPlayerShip++;
}
else if(key == "fuel.max")
{
isPlayerShip++;
}
}
this.client.playerData.inPlayerShip = (isPlayerShip == 2);
uint clientID = packetData.ReadUInt32BE();
bool bool1 = packetData.ReadBoolean();
WorldCoordinate coords = Utils.findGlobalCoords(sky);
if (coords != null)
{
this.client.playerData.loc = coords;
StarryboundServer.logDebug("WorldStart", "[" + this.client.playerData.client + "][" + bool1 + ":" + clientID + "] CurLoc:[" + this.client.playerData.loc.ToString() + "][" + this.client.playerData.inPlayerShip + "]");
}
else
StarryboundServer.logDebug("WorldStart", "[" + this.client.playerData.client + "][" + bool1 + ":" + clientID + "] InPlayerShip:[" + this.client.playerData.inPlayerShip + "]");
}
else if (packetID == Packet.WorldStop)
{
string status = packetData.ReadStarString();
}
else if (packetID == Packet.GiveItem)
{
string name = packetData.ReadStarString();
uint count = packetData.ReadVarUInt32();
var itemDesc = packetData.ReadStarVariant();
}
else if (packetID == Packet.EnvironmentUpdate)
{
byte[] sky = packetData.ReadStarByteArray();
byte[] serverWeather = packetData.ReadStarByteArray();
if (this.client.playerData.loc == null)
{
WorldCoordinate coords = Utils.findGlobalCoords(sky);
if (coords != null)
{
this.client.playerData.loc = coords;
StarryboundServer.logDebug("EnvUpdate", "[" + this.client.playerData.client + "] CurLoc:[" + this.client.playerData.loc.ToString() + "]");
}
}
}
else if (packetID == Packet.ClientContextUpdate)
{
try
{
byte[] clientContextData = packetData.ReadStarByteArray();
if (clientContextData.Length != 0)
{
BinaryReader clientContextReader = new BinaryReader(new MemoryStream(clientContextData));
byte[] data = clientContextReader.ReadStarByteArray();
if (data.Length > 8) //Should at least be more than 8 bytes for it to contain the data we want.
{
BinaryReader dataReader = new BinaryReader(new MemoryStream(data));
byte dataBufferLength = dataReader.ReadByte();
if (dataBufferLength == 2)
{
byte arrayLength = dataReader.ReadByte();
if (arrayLength == 2 || arrayLength == 4) //Only observed these being used so far for what we want.
{
byte dataType = dataReader.ReadByte(); //04 = String, 0E = CelestialLog
if (dataType == 4)
{
string string1 = dataReader.ReadStarString();
if (dataReader.BaseStream.Position != dataReader.BaseStream.Length)
{
if (string1 == "null")
{
byte[] worldHeader = dataReader.ReadStarByteArray(); //0008020A000C
byte[] worldData = dataReader.ReadStarByteArray();
byte typeByte = dataReader.ReadByte(); //0E = CelestialLog
if (typeByte == 14)
{
Dictionary<string, WorldCoordinate> log = dataReader.ReadStarCelestialLog();
log.TryGetValue("loc", out this.client.playerData.loc);
if (!log.TryGetValue("home", out this.client.playerData.home))
this.client.playerData.home = this.client.playerData.loc;
StarryboundServer.logDebug("ClientContext", "[" + this.client.playerData.client + "] CurLoc:[" + this.client.playerData.loc.ToString() + "][" + this.client.playerData.inPlayerShip + "]");
StarryboundServer.logDebug("ClientContext", "[" + this.client.playerData.client + "] CurHome:[" + this.client.playerData.home.ToString() + "]");
}
}
}
}
else if (dataType == 14)
{
Dictionary<string, WorldCoordinate> log = dataReader.ReadStarCelestialLog();
log.TryGetValue("loc", out this.client.playerData.loc);
if (!log.TryGetValue("home", out this.client.playerData.home))
this.client.playerData.home = this.client.playerData.loc;
StarryboundServer.logDebug("ClientContext", "[" + this.client.playerData.client + "] CurLoc:[" + this.client.playerData.loc.ToString() + "][" + this.client.playerData.inPlayerShip + "]");
StarryboundServer.logDebug("ClientContext", "[" + this.client.playerData.client + "] CurHome:[" + this.client.playerData.home.ToString() + "]");
}
}
}
}
}
}
catch (Exception e)
{
StarryboundServer.logDebug("ClientContext", "[" + this.client.playerData.client + "] Failed to parse ClientContextUpdate from Server: " + e.ToString());
}
}
else if (packetID == Packet.EntityCreate)
{
MemoryStream sendStream = new MemoryStream();
BinaryWriter sendWriter = new BinaryWriter(sendStream);
bool test = true;
while (true)
{
EntityType type = (EntityType)packetData.Read();
if (type == EntityType.EOF) break;
byte[] entityData = packetData.ReadStarByteArray();
int entityId = packetData.ReadVarInt32();
if (type == EntityType.Player)
{
byte[] buffer = new byte[16];
Buffer.BlockCopy(entityData, 0, buffer, 0, 16);
buffer = Utils.HashUUID(buffer);
Buffer.BlockCopy(buffer, 0, entityData, 0, 16);
returnData = test = false;
}
sendWriter.Write((byte)type);
sendWriter.WriteVarUInt64((ulong)entityData.Length);
sendWriter.Write(entityData);
sendWriter.WriteVarInt32(entityId);
}
if(test == false)
{
this.outgoing.WriteVarUInt32((uint)packetID);
this.outgoing.WriteVarInt32((int)sendStream.Length);
this.outgoing.Write(sendStream.ToArray());
this.outgoing.Flush();
}
}
}
#endregion
}
//Check return data
if (returnData is Boolean)
{
if ((Boolean)returnData == false) continue;
}
else if (returnData is int)
{
if ((int)returnData == -1)
{
this.client.forceDisconnect(direction, "Command processor requested to drop client");
return;
}
}
#region Forward Packet
//Write data to dest
this.outgoing.WriteVarUInt32((uint)packetID);
if (compressed)
{
this.outgoing.WriteVarInt32(-packetSize);
this.outgoing.Write(dataBuffer, 0, packetSize);
}
else
{
this.outgoing.WriteVarInt32(packetSize);
this.outgoing.Write(dataBuffer, 0, packetSize);
}
this.outgoing.Flush();
#endregion
//If disconnect was forwarded to client, lets disconnect.
if(packetID == Packet.ServerDisconnect && direction == Direction.Server)
{
this.client.closeConnection();
}
}
}
catch (ThreadAbortException) { }
catch (EndOfStreamException)
{
this.client.forceDisconnect(direction, "End of stream");
}
catch (Exception e)
{
if(e.InnerException != null)
{
if(e.InnerException is System.Net.Sockets.SocketException)
{
this.client.forceDisconnect(direction, e.InnerException.Message);
return;
}
}
this.client.forceDisconnect(direction, "ForwardThread Exception: " + e.ToString());
}
}
}
}