/// <summary>
/// Read the next packet from the network
/// </summary>
/// <param name="packetID">will contain packet ID</param>
/// <param name="packetData">will contain raw packet Data</param>
private void readNextPacket(ref int packetID, ref byte[] packetData)
{
int size = readNextVarIntRAW(); //Packet size
packetData = readDataRAW(size); //Packet contents
if (compression_treshold > 0) //Handle packet decompression
{
int size_uncompressed = readNextVarInt(ref packetData);
if (size_uncompressed != 0) // != 0 means compressed, let's decompress
{
packetData = ZlibUtils.Decompress(packetData, size_uncompressed);
}
}
packetID = readNextVarInt(ref packetData); //Packet ID
}
private void readNextPacket(TcpClient c, ref int packetID, ref byte[] packetData, ref byte[] packetRawData)
{
int size = readNextVarIntRAW(c);
packetData = readDataRAW(c, size);
packetRawData = concatBytes(getVarInt(size), packetData);
if (compression_treshold > 0)
{
int size_uncompressed = readNextVarInt(ref packetData);
if (size_uncompressed != 0)
{
packetData = ZlibUtils.Decompress(packetData, size_uncompressed);
}
}
packetID = readNextVarInt(ref packetData);
}
/// <summary>
/// Send a packet to the server. Compression and encryption will be handled automatically.
/// </summary>
/// <param name="packetID">packet ID</param>
/// <param name="packetData">packet Data</param>
private void SendPacket(int packetID, IEnumerable <byte> packetData)
{
//The inner packet
byte[] the_packet = dataTypes.ConcatBytes(dataTypes.GetVarInt(packetID), packetData.ToArray());
if (compression_treshold > 0) //Compression enabled?
{
if (the_packet.Length >= compression_treshold) //Packet long enough for compressing?
{
byte[] compressed_packet = ZlibUtils.Compress(the_packet);
the_packet = dataTypes.ConcatBytes(dataTypes.GetVarInt(the_packet.Length), compressed_packet);
}
else
{
byte[] uncompressed_length = dataTypes.GetVarInt(0); //Not compressed (short packet)
the_packet = dataTypes.ConcatBytes(uncompressed_length, the_packet);
}
}
socketWrapper.SendDataRAW(dataTypes.ConcatBytes(dataTypes.GetVarInt(the_packet.Length), the_packet));
}
/// <summary>
/// Read the next packet from the network
/// </summary>
/// <param name="packetID">will contain packet ID</param>
/// <param name="packetData">will contain raw packet Data</param>
internal void ReadNextPacket(ref int packetID, List <byte> packetData)
{
packetData.Clear();
int size = dataTypes.ReadNextVarIntRAW(socketWrapper); //Packet size
packetData.AddRange(socketWrapper.ReadDataRAW(size)); //Packet contents
//Handle packet decompression
if (protocolversion >= MC18Version &&
compression_treshold > 0)
{
int sizeUncompressed = dataTypes.ReadNextVarInt(packetData);
if (sizeUncompressed != 0) // != 0 means compressed, let's decompress
{
byte[] toDecompress = packetData.ToArray();
byte[] uncompressed = ZlibUtils.Decompress(toDecompress, sizeUncompressed);
packetData.Clear();
packetData.AddRange(uncompressed);
}
}
packetID = dataTypes.ReadNextVarInt(packetData); //Packet ID
}
/// <summary>
/// Send a packet to the server, compression and encryption will be handled automatically
/// </summary>
/// <param name="packetID">packet ID</param>
/// <param name="packetData">packet Data</param>
private void SendPacket(int packetID, byte[] packetData)
{
//The inner packet
byte[] the_packet = concatBytes(getVarInt(packetID), packetData);
if (compression_treshold > 0) //Compression enabled?
{
if (the_packet.Length > compression_treshold) //Packet long enough for compressing?
{
byte[] uncompressed_length = getVarInt(the_packet.Length);
byte[] compressed_packet = ZlibUtils.Compress(the_packet);
byte[] compressed_packet_length = getVarInt(compressed_packet.Length);
the_packet = concatBytes(compressed_packet_length, compressed_packet);
}
else
{
byte[] uncompressed_length = getVarInt(0); //Not compressed (short packet)
the_packet = concatBytes(uncompressed_length, the_packet);
}
}
SendRAW(concatBytes(getVarInt(the_packet.Length), the_packet));
}
/// <summary>
/// Handle the given packet
/// </summary>
/// <param name="packetID">Packet ID</param>
/// <param name="packetData">Packet contents</param>
/// <returns>TRUE if the packet was processed, FALSE if ignored or unknown</returns>
internal bool HandlePacket(int packetID, List <byte> packetData)
{
try
{
if (login_phase)
{
switch (packetID) //Packet IDs are different while logging in
{
case 0x03:
if (protocolversion >= MC18Version)
{
compression_treshold = dataTypes.ReadNextVarInt(packetData);
}
break;
default:
return(false); //Ignored packet
}
}
// Regular in-game packets
switch (Protocol18PacketTypes.GetPacketIncomingType(packetID, protocolversion))
{
case PacketIncomingType.KeepAlive:
SendPacket(PacketOutgoingType.KeepAlive, packetData);
break;
case PacketIncomingType.JoinGame:
handler.OnGameJoined();
dataTypes.ReadNextInt(packetData);
dataTypes.ReadNextByte(packetData);
if (protocolversion >= MC191Version)
{
this.currentDimension = dataTypes.ReadNextInt(packetData);
}
else
{
this.currentDimension = (sbyte)dataTypes.ReadNextByte(packetData);
}
if (protocolversion < MC114Version)
{
dataTypes.ReadNextByte(packetData); // Difficulty - 1.13 and below
}
dataTypes.ReadNextByte(packetData);
dataTypes.ReadNextString(packetData);
if (protocolversion >= MC114Version)
{
dataTypes.ReadNextVarInt(packetData); // View distance - 1.14 and above
}
if (protocolversion >= MC18Version)
{
dataTypes.ReadNextBool(packetData); // Reduced debug info - 1.8 and above
}
break;
case PacketIncomingType.ChatMessage:
string message = dataTypes.ReadNextString(packetData);
try
{
//Hide system messages or xp bar messages?
byte messageType = dataTypes.ReadNextByte(packetData);
if ((messageType == 1 && !Settings.DisplaySystemMessages) ||
(messageType == 2 && !Settings.DisplayXPBarMessages))
{
break;
}
}
catch (ArgumentOutOfRangeException) { /* No message type */ }
handler.OnTextReceived(message, true);
break;
case PacketIncomingType.Respawn:
this.currentDimension = dataTypes.ReadNextInt(packetData);
if (protocolversion < MC114Version)
{
dataTypes.ReadNextByte(packetData); // Difficulty - 1.13 and below
}
dataTypes.ReadNextByte(packetData);
dataTypes.ReadNextString(packetData);
handler.OnRespawn();
break;
case PacketIncomingType.PlayerPositionAndLook:
if (handler.GetTerrainEnabled())
{
double x = dataTypes.ReadNextDouble(packetData);
double y = dataTypes.ReadNextDouble(packetData);
double z = dataTypes.ReadNextDouble(packetData);
float yaw = dataTypes.ReadNextFloat(packetData);
float pitch = dataTypes.ReadNextFloat(packetData);
byte locMask = dataTypes.ReadNextByte(packetData);
if (protocolversion >= MC18Version)
{
Location location = handler.GetCurrentLocation();
location.X = (locMask & 1 << 0) != 0 ? location.X + x : x;
location.Y = (locMask & 1 << 1) != 0 ? location.Y + y : y;
location.Z = (locMask & 1 << 2) != 0 ? location.Z + z : z;
handler.UpdateLocation(location, yaw, pitch);
}
else
{
handler.UpdateLocation(new Location(x, y, z), yaw, pitch);
}
}
if (protocolversion >= MC19Version)
{
int teleportID = dataTypes.ReadNextVarInt(packetData);
// Teleport confirm packet
SendPacket(PacketOutgoingType.TeleportConfirm, dataTypes.GetVarInt(teleportID));
}
break;
case PacketIncomingType.ChunkData:
if (handler.GetTerrainEnabled())
{
int chunkX = dataTypes.ReadNextInt(packetData);
int chunkZ = dataTypes.ReadNextInt(packetData);
bool chunksContinuous = dataTypes.ReadNextBool(packetData);
ushort chunkMask = protocolversion >= MC19Version
? (ushort)dataTypes.ReadNextVarInt(packetData)
: dataTypes.ReadNextUShort(packetData);
if (protocolversion < MC18Version)
{
ushort addBitmap = dataTypes.ReadNextUShort(packetData);
int compressedDataSize = dataTypes.ReadNextInt(packetData);
byte[] compressed = dataTypes.ReadData(compressedDataSize, packetData);
byte[] decompressed = ZlibUtils.Decompress(compressed);
pTerrain.ProcessChunkColumnData(chunkX, chunkZ, chunkMask, addBitmap, currentDimension == 0, chunksContinuous, currentDimension, new List <byte>(decompressed));
}
else
{
if (protocolversion >= MC114Version)
{
dataTypes.ReadNextNbt(packetData); // Heightmaps - 1.14 and above
}
int dataSize = dataTypes.ReadNextVarInt(packetData);
pTerrain.ProcessChunkColumnData(chunkX, chunkZ, chunkMask, 0, false, chunksContinuous, currentDimension, packetData);
}
}
break;
case PacketIncomingType.MultiBlockChange:
if (handler.GetTerrainEnabled())
{
int chunkX = dataTypes.ReadNextInt(packetData);
int chunkZ = dataTypes.ReadNextInt(packetData);
int recordCount = protocolversion < MC18Version
? (int)dataTypes.ReadNextShort(packetData)
: dataTypes.ReadNextVarInt(packetData);
for (int i = 0; i < recordCount; i++)
{
byte locationXZ;
ushort blockIdMeta;
int blockY;
if (protocolversion < MC18Version)
{
blockIdMeta = dataTypes.ReadNextUShort(packetData);
blockY = (ushort)dataTypes.ReadNextByte(packetData);
locationXZ = dataTypes.ReadNextByte(packetData);
}
else
{
locationXZ = dataTypes.ReadNextByte(packetData);
blockY = (ushort)dataTypes.ReadNextByte(packetData);
blockIdMeta = (ushort)dataTypes.ReadNextVarInt(packetData);
}
int blockX = locationXZ >> 4;
int blockZ = locationXZ & 0x0F;
Block block = new Block(blockIdMeta);
handler.GetWorld().SetBlock(new Location(chunkX, chunkZ, blockX, blockY, blockZ), block);
}
}
break;
case PacketIncomingType.BlockChange:
if (handler.GetTerrainEnabled())
{
if (protocolversion < MC18Version)
{
int blockX = dataTypes.ReadNextInt(packetData);
int blockY = dataTypes.ReadNextByte(packetData);
int blockZ = dataTypes.ReadNextInt(packetData);
short blockId = (short)dataTypes.ReadNextVarInt(packetData);
byte blockMeta = dataTypes.ReadNextByte(packetData);
handler.GetWorld().SetBlock(new Location(blockX, blockY, blockZ), new Block(blockId, blockMeta));
}
else
{
handler.GetWorld().SetBlock(dataTypes.ReadNextLocation(packetData), new Block((ushort)dataTypes.ReadNextVarInt(packetData)));
}
}
break;
case PacketIncomingType.MapChunkBulk:
if (protocolversion < MC19Version && handler.GetTerrainEnabled())
{
int chunkCount;
bool hasSkyLight;
List <byte> chunkData = packetData;
//Read global fields
if (protocolversion < MC18Version)
{
chunkCount = dataTypes.ReadNextShort(packetData);
int compressedDataSize = dataTypes.ReadNextInt(packetData);
hasSkyLight = dataTypes.ReadNextBool(packetData);
byte[] compressed = dataTypes.ReadData(compressedDataSize, packetData);
byte[] decompressed = ZlibUtils.Decompress(compressed);
chunkData = new List <byte>(decompressed);
}
else
{
hasSkyLight = dataTypes.ReadNextBool(packetData);
chunkCount = dataTypes.ReadNextVarInt(packetData);
}
//Read chunk records
int[] chunkXs = new int[chunkCount];
int[] chunkZs = new int[chunkCount];
ushort[] chunkMasks = new ushort[chunkCount];
ushort[] addBitmaps = new ushort[chunkCount];
for (int chunkColumnNo = 0; chunkColumnNo < chunkCount; chunkColumnNo++)
{
chunkXs[chunkColumnNo] = dataTypes.ReadNextInt(packetData);
chunkZs[chunkColumnNo] = dataTypes.ReadNextInt(packetData);
chunkMasks[chunkColumnNo] = dataTypes.ReadNextUShort(packetData);
addBitmaps[chunkColumnNo] = protocolversion < MC18Version
? dataTypes.ReadNextUShort(packetData)
: (ushort)0;
}
//Process chunk records
for (int chunkColumnNo = 0; chunkColumnNo < chunkCount; chunkColumnNo++)
{
pTerrain.ProcessChunkColumnData(chunkXs[chunkColumnNo], chunkZs[chunkColumnNo], chunkMasks[chunkColumnNo], addBitmaps[chunkColumnNo], hasSkyLight, true, currentDimension, chunkData);
}
}
break;
case PacketIncomingType.UnloadChunk:
if (protocolversion >= MC19Version && handler.GetTerrainEnabled())
{
int chunkX = dataTypes.ReadNextInt(packetData);
int chunkZ = dataTypes.ReadNextInt(packetData);
handler.GetWorld()[chunkX, chunkZ] = null;
}
break;
case PacketIncomingType.PlayerListUpdate:
if (protocolversion >= MC18Version)
{
int action = dataTypes.ReadNextVarInt(packetData);
int numActions = dataTypes.ReadNextVarInt(packetData);
for (int i = 0; i < numActions; i++)
{
Guid uuid = dataTypes.ReadNextUUID(packetData);
switch (action)
{
case 0x00: //Player Join
string name = dataTypes.ReadNextString(packetData);
int propNum = dataTypes.ReadNextVarInt(packetData);
for (int p = 0; p < propNum; p++)
{
string key = dataTypes.ReadNextString(packetData);
string val = dataTypes.ReadNextString(packetData);
if (dataTypes.ReadNextBool(packetData))
{
dataTypes.ReadNextString(packetData);
}
}
dataTypes.ReadNextVarInt(packetData);
dataTypes.ReadNextVarInt(packetData);
if (dataTypes.ReadNextBool(packetData))
{
dataTypes.ReadNextString(packetData);
}
handler.OnPlayerJoin(uuid, name);
break;
case 0x01: //Update gamemode
case 0x02: //Update latency
dataTypes.ReadNextVarInt(packetData);
break;
case 0x03: //Update display name
if (dataTypes.ReadNextBool(packetData))
{
dataTypes.ReadNextString(packetData);
}
break;
case 0x04: //Player Leave
handler.OnPlayerLeave(uuid);
break;
default:
//Unknown player list item type
break;
}
}
}
else //MC 1.7.X does not provide UUID in tab-list updates
{
string name = dataTypes.ReadNextString(packetData);
bool online = dataTypes.ReadNextBool(packetData);
short ping = dataTypes.ReadNextShort(packetData);
Guid FakeUUID = new Guid(MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(name)).Take(16).ToArray());
if (online)
{
handler.OnPlayerJoin(FakeUUID, name);
}
else
{
handler.OnPlayerLeave(FakeUUID);
}
}
break;
case PacketIncomingType.TabCompleteResult:
if (protocolversion >= MC113Version)
{
autocomplete_transaction_id = dataTypes.ReadNextVarInt(packetData);
dataTypes.ReadNextVarInt(packetData); // Start of text to replace
dataTypes.ReadNextVarInt(packetData); // Length of text to replace
}
int autocomplete_count = dataTypes.ReadNextVarInt(packetData);
autocomplete_result.Clear();
for (int i = 0; i < autocomplete_count; i++)
{
autocomplete_result.Add(dataTypes.ReadNextString(packetData));
if (protocolversion >= MC113Version)
{
// Skip optional tooltip for each tab-complete result
if (dataTypes.ReadNextBool(packetData))
{
dataTypes.ReadNextString(packetData);
}
}
}
autocomplete_received = true;
break;
case PacketIncomingType.PluginMessage:
String channel = dataTypes.ReadNextString(packetData);
// Length is unneeded as the whole remaining packetData is the entire payload of the packet.
if (protocolversion < MC18Version)
{
pForge.ReadNextVarShort(packetData);
}
handler.OnPluginChannelMessage(channel, packetData.ToArray());
return(pForge.HandlePluginMessage(channel, packetData, ref currentDimension));
case PacketIncomingType.KickPacket:
handler.OnConnectionLost(ChatBot.DisconnectReason.InGameKick, ChatParser.ParseText(dataTypes.ReadNextString(packetData)));
return(false);
case PacketIncomingType.NetworkCompressionTreshold:
if (protocolversion >= MC18Version && protocolversion < MC19Version)
{
compression_treshold = dataTypes.ReadNextVarInt(packetData);
}
break;
case PacketIncomingType.ResourcePackSend:
string url = dataTypes.ReadNextString(packetData);
string hash = dataTypes.ReadNextString(packetData);
//Send back "accepted" and "successfully loaded" responses for plugins making use of resource pack mandatory
byte[] responseHeader = new byte[0];
if (protocolversion < MC110Version) //MC 1.10 does not include resource pack hash in responses
{
responseHeader = dataTypes.ConcatBytes(dataTypes.GetVarInt(hash.Length), Encoding.UTF8.GetBytes(hash));
}
SendPacket(PacketOutgoingType.ResourcePackStatus, dataTypes.ConcatBytes(responseHeader, dataTypes.GetVarInt(3))); //Accepted pack
SendPacket(PacketOutgoingType.ResourcePackStatus, dataTypes.ConcatBytes(responseHeader, dataTypes.GetVarInt(0))); //Successfully loaded
break;
default:
return(false); //Ignored packet
}
return(true); //Packet processed
}
catch (Exception innerException)
{
throw new System.IO.InvalidDataException(
String.Format("Failed to process incoming packet of type {0}. (PacketID: {1}, Protocol: {2}, LoginPhase: {3}, InnerException: {4}).",
Protocol18PacketTypes.GetPacketIncomingType(packetID, protocolversion),
packetID,
protocolversion,
login_phase,
innerException.GetType()),
innerException);
}
}