private void HandleSplitMessage(PlayerNetworkSession playerSession, ConnectedPackage package, SplitPartPackage splitMessage, Player player)
{
int spId = package._splitPacketId;
int spIdx = package._splitPacketIndex;
int spCount = package._splitPacketCount;
if (!playerSession.Splits.ContainsKey(spId))
{
playerSession.Splits.TryAdd(spId, new SplitPartPackage[spCount]);
}
SplitPartPackage[] spPackets = playerSession.Splits[spId];
spPackets[spIdx] = splitMessage;
bool haveEmpty = false;
for (int i = 0; i < spPackets.Length; i++)
{
haveEmpty = haveEmpty || spPackets[i] == null;
}
if (!haveEmpty)
{
Log.DebugFormat("Got all {0} split packages for split ID: {1}", spCount, spId);
SplitPartPackage[] waste;
playerSession.Splits.TryRemove(spId, out waste);
MemoryStream stream = new MemoryStream();
for (int i = 0; i < spPackets.Length; i++)
{
SplitPartPackage splitPartPackage = spPackets[i];
byte[] buf = splitPartPackage.Message;
if (buf == null)
{
Log.Error("Expected bytes in splitpart, but got none");
continue;
}
stream.Write(buf, 0, buf.Length);
splitPartPackage.PutPool();
}
byte[] buffer = stream.ToArray();
try
{
Package fullMessage = PackageFactory.CreatePackage(buffer[0], buffer) ?? new UnknownPackage(buffer[0], buffer);
fullMessage.DatagramSequenceNumber = package._datagramSequenceNumber;
fullMessage.ReliableMessageNumber = package._reliableMessageNumber;
fullMessage.OrderingChannel = package._orderingChannel;
fullMessage.OrderingIndex = package._orderingIndex;
HandlePackage(fullMessage, playerSession);
fullMessage.PutPool();
}
catch (Exception e)
{
player.Disconnect("Bad package received from client.");
}
}
}
private void HandleRakNetMessage(IPEndPoint senderEndpoint, OpenConnectionRequest2 incoming)
{
PlayerNetworkSession session;
lock (_playerSessions)
{
DateTime trash;
if (!_connectionAttemps.TryRemove(senderEndpoint, out trash))
{
Log.WarnFormat("Unexpected connection request packet from {0}. Probably a resend.", senderEndpoint.Address);
return;
}
if (_playerSessions.TryGetValue(senderEndpoint, out session))
{
// Already connecting, then this is just a duplicate
if (session.State == ConnectionState.Connecting /* && DateTime.UtcNow < session.LastUpdatedTime + TimeSpan.FromSeconds(2)*/)
{
return;
}
Log.InfoFormat("Unexpected session from {0}. Removing old session and disconnecting old player.", senderEndpoint.Address);
session.Disconnect("Reconnecting.", false);
_playerSessions.TryRemove(senderEndpoint, out session);
}
session = new PlayerNetworkSession(this, null, senderEndpoint, incoming.mtuSize)
{
State = ConnectionState.Connecting,
LastUpdatedTime = DateTime.UtcNow,
MtuSize = incoming.mtuSize,
NetworkIdentifier = incoming.clientGuid
};
_playerSessions.TryAdd(senderEndpoint, session);
}
//Player player = PlayerFactory.CreatePlayer(this, senderEndpoint);
//player.ClientGuid = incoming.clientGuid;
//player.NetworkHandler = session;
//session.Player = player;
session.MessageHandler = new LoginMessageHandler(session);
var reply = OpenConnectionReply2.CreateObject();
reply.serverGuid = MotdProvider.ServerId;
reply.clientEndpoint = senderEndpoint;
reply.mtuSize = incoming.mtuSize;
reply.doSecurityAndHandshake = new byte[1];
var data = reply.Encode();
TraceSend(reply);
reply.PutPool();
SendData(data, senderEndpoint);
}
private void SendAckQueue(object state)
{
var sessions = _playerSessions.Values.ToArray();
foreach (var s in sessions)
{
ThreadPool.QueueUserWorkItem(delegate(object o)
{
PlayerNetworkSession session = (PlayerNetworkSession) o;
var queue = session.PlayerAckQueue;
int lenght = queue.Count;
if (lenght == 0) return;
Acks acks = Acks.CreateObject();
for (int i = 0; i < lenght; i++)
{
int ack;
if (!session.PlayerAckQueue.TryDequeue(out ack)) break;
acks.acks.Add(ack);
}
if (acks.acks.Count > 0)
{
byte[] data = acks.Encode();
SendData(data, session.EndPoint);
}
acks.PutPool();
}, s);
}
}
private void SendAckQueue()
{
PlayerNetworkSession session = this;
var queue = session.PlayerAckQueue;
int lenght = queue.Count;
if (lenght == 0)
{
return;
}
Acks acks = Acks.CreateObject();
//Acks acks = new Acks();
for (int i = 0; i < lenght; i++)
{
int ack;
if (!session.PlayerAckQueue.TryDequeue(out ack))
{
break;
}
Interlocked.Increment(ref Server.ServerInfo.NumberOfAckSent);
acks.acks.Add(ack);
}
if (acks.acks.Count > 0)
{
byte[] data = acks.Encode();
Server.SendData(data, session.EndPoint);
}
acks.PutPool();
}
internal void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
Player player = playerSession.Player;
if (message == null)
{
return;
}
TraceReceive(message, message.DatagramSequenceNumber);
if (message.Reliability == Reliability.ReliableOrdered)
{
playerSession.AddToProcessing(message);
return;
}
if (typeof(UnknownPackage) == message.GetType())
{
UnknownPackage packet = (UnknownPackage)message;
Log.Warn($"Received unknown package 0x{message.Id:X2}\n{Package.HexDump(packet.Message)}");
message.PutPool();
return;
}
player?.HandlePackage(message);
message.PutPool();
}
private void SendDatagram(PlayerNetworkSession session, Datagram datagram)
{
if (datagram.MessageParts.Count == 0)
{
datagram.PutPool();
Log.WarnFormat("Failed to resend #{0}", datagram.Header.datagramSequenceNumber.IntValue());
return;
}
datagram.Header.datagramSequenceNumber = Interlocked.Increment(ref session.DatagramSequenceNumber);
datagram.TransmissionCount++;
byte[] data = datagram.Encode();
datagram.Timer.Restart();
if (!session.WaitingForAcksQueue.TryAdd(datagram.Header.datagramSequenceNumber.IntValue(), datagram))
{
Log.Warn(string.Format("Datagram sequence unexpectedly existed in the ACK/NAK queue already {0}", datagram.Header.datagramSequenceNumber.IntValue()));
}
//datagram.PutPool();
lock (session.SyncRoot)
{
SendData(data, session.EndPoint);
}
}
private void DelayedProcessing(PlayerNetworkSession playerSession, ConnectedPackage package)
{
Player player = playerSession.Player;
if (ForwardAllPlayers)
{
var transfer = McpeTransfer.CreateObject();
transfer.endpoint = ForwardTarget;
player.SendPackage(transfer, true);
return;
}
List <Package> messages = package.Messages;
foreach (var message in messages)
{
//message.DatagramSequenceNumber = package._datagramSequenceNumber;
//message.ReliableMessageNumber = package._reliableMessageNumber;
//message.OrderingChannel = package._orderingChannel;
//message.OrderingIndex = package._orderingIndex;
if (message is SplitPartPackage)
{
HandleSplitMessage(playerSession, package, (SplitPartPackage)message, player);
continue;
}
message.Timer.Restart();
HandlePackage(message, playerSession);
message.PutPool(); // Handled in HandlePacket now()
}
}
internal void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
if (message == null)
{
return;
}
TraceReceive(message);
if (typeof(UnknownPackage) == message.GetType())
{
return;
}
if (typeof(McpeBatch) == message.GetType())
{
McpeBatch batch = (McpeBatch)message;
var messages = new List <Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = new MemoryStream();
defStream2.CopyTo(destination);
byte[] internalBuffer = destination.ToArray();
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer) ?? new UnknownPackage(internalBuffer[0], internalBuffer));
}
foreach (var msg in messages)
{
msg.DatagramSequenceNumber = batch.DatagramSequenceNumber;
msg.OrderingChannel = batch.OrderingChannel;
msg.OrderingIndex = batch.OrderingIndex;
HandlePackage(msg, playerSession);
msg.PutPool();
}
return;
}
message.Source = "HandlePackage";
Player player = playerSession.Player;
if (player != null)
{
player.HandlePackage(message);
}
}
public void SendPackage(PlayerNetworkSession session, Package message)
{
foreach (var datagram in Datagram.CreateDatagrams(message, session.MtuSize, session))
{
SendDatagram(session, datagram);
}
message.PutPool();
}
private void HandleAck(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null)
{
return;
}
//Ack ack = Ack.CreateObject();
Ack ack = new Ack();
//ack.Reset();
ack.Decode(receiveBytes);
var queue = session.WaitingForAcksQueue;
foreach (Tuple <int, int> range in ack.ranges)
{
Interlocked.Increment(ref ServerInfo.NumberOfAckReceive);
int start = range.Item1;
int end = range.Item2;
for (int i = start; i <= end; i++)
{
Datagram datagram;
if (queue.TryRemove(i, out datagram))
{
//if (Log.IsDebugEnabled)
// Log.DebugFormat("ACK, on datagram #{0} for {2}. Queue size={1}", i, queue.Count, player.Username);
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = session.Rtt;
long RTTVar = session.RttVar;
session.Rtt = (long)(RTT * 0.875 + rtt * 0.125);
session.RttVar = (long)(RTTVar * 0.875 + Math.Abs(RTT - rtt) * 0.125);
session.Rto = session.Rtt + 4 * session.RttVar + 100; // SYNC time in the end
datagram.PutPool();
}
else
{
if (Log.IsDebugEnabled)
{
Log.WarnFormat("ACK, Failed to remove datagram #{0} for {2}. Queue size={1}", i, queue.Count, session.Username);
}
}
}
}
//ack.PutPool();
session.ResendCount = 0;
session.WaitForAck = false;
}
private void HandleNak(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null)
{
return;
}
Player player = session.Player;
if (player == null)
{
return;
}
Nak nak = Nak.CreateObject();
nak.Decode(receiveBytes);
int ackSeqNo = nak.sequenceNumber.IntValue();
int toAckSeqNo = nak.toSequenceNumber.IntValue();
if (nak.onlyOneSequence == 1)
{
toAckSeqNo = ackSeqNo;
}
nak.PutPool();
var queue = session.WaitingForAcksQueue;
Log.DebugFormat("NAK from Player {0} ({5}) #{1}-{2} IsOnlyOne {3} Count={4}", player.Username, ackSeqNo, toAckSeqNo, nak.onlyOneSequence, nak.count, player.Rtt);
for (int i = ackSeqNo; i <= toAckSeqNo; i++)
{
session.ErrorCount++;
Datagram datagram;
if (queue.TryRemove(i, out datagram))
{
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = player.Rtt;
long RTTVar = player.RttVar;
player.Rtt = (long)(RTT * 0.875 + rtt * 0.125);
player.RttVar = (long)(RTTVar * 0.875 + Math.Abs(RTT - rtt) * 0.125);
player.Rto = player.Rtt + 4 * player.RttVar + 10; // SYNC time in the end
SendDatagram(session, datagram);
}
else
{
Log.DebugFormat("NAK, no datagram #{0} to resend for {1}", i, player.Username);
}
}
}
private void HandleNak(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null) return;
Player player = session.Player;
if (player == null) return;
Nak nak = Nak.CreateObject();
nak.Reset();
nak.Decode(receiveBytes);
var queue = session.WaitingForAcksQueue;
foreach (Tuple<int, int> range in nak.ranges)
{
ServerInfo.NumberOfNakReceive++;
int start = range.Item1;
int end = range.Item2;
for (int i = start; i <= end; i++)
{
session.ErrorCount++;
// HACK: Just to make sure we aren't getting unessecary load on the queue during heavy buffering.
if (ServerInfo.AvailableBytes > 1000) continue;
Datagram datagram;
if (queue.TryGetValue(i, out datagram))
{
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = player.Rtt;
long RTTVar = player.RttVar;
player.Rtt = (long) (RTT*0.875 + rtt*0.125);
player.RttVar = (long) (RTTVar*0.875 + Math.Abs(RTT - rtt)*0.125);
player.Rto = player.Rtt + 4*player.RttVar + 100; // SYNC time in the end
//if (Log.IsDebugEnabled)
// Log.ErrorFormat("NAK, resending datagram #{0} for {1}, MTU: {2}", i, player.Username, session.Mtuize);
//SendDatagram(session, datagram, false);
}
else
{
if (Log.IsDebugEnabled)
//Log.WarnFormat("NAK, no datagram #{0} to resend for {1}", i, player.Username);
}
}
}
nak.PutPool();
}
private static void CalculateRto(PlayerNetworkSession session, Datagram datagram)
{
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = session.Rtt;
long RTTVar = session.RttVar;
session.Rtt = (long)(RTT * 0.875 + rtt * 0.125);
session.RttVar = (long)(RTTVar * 0.875 + Math.Abs(RTT - rtt) * 0.125);
session.Rto = session.Rtt + 4 * session.RttVar + 100; // SYNC time in the end
}
private void HandleConnectedPackage(PlayerNetworkSession playerSession, ConnectedPackage package)
{
foreach (var message in package.Messages)
{
if (message is SplitPartPackage)
{
HandleSplitMessage(playerSession, (SplitPartPackage)message);
continue;
}
message.Timer.Restart();
HandlePackage(message, playerSession);
}
}
/// <summary>
/// Handles the specified package.
/// </summary>
/// <param name="message">The package.</param>
/// <param name="senderEndpoint">The sender's endpoint.</param>
private void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
TraceReceive(message);
if (typeof(UnknownPackage) == message.GetType())
{
return;
}
if (typeof(McpeBatch) == message.GetType())
{
McpeBatch batch = (McpeBatch)message;
var messages = new List <Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = new MemoryStream();
defStream2.CopyTo(destination);
byte[] internalBuffer = destination.ToArray();
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer) ?? new UnknownPackage(internalBuffer[0], internalBuffer));
}
foreach (var msg in messages)
{
HandlePackage(msg, playerSession);
}
}
playerSession.Player.HandlePackage(message);
playerSession.LastUpdatedTime = DateTime.UtcNow;
if (typeof(DisconnectionNotification) == message.GetType())
{
PlayerNetworkSession value;
_playerSessions.TryRemove(playerSession.EndPoint, out value);
}
}
private void HandleAck(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null)
{
return;
}
//Ack ack = Ack.CreateObject();
Ack ack = new Ack();
//ack.Reset();
ack.Decode(receiveBytes);
var queue = session.WaitingForAcksQueue;
foreach (Tuple <int, int> range in ack.ranges)
{
Interlocked.Increment(ref ServerInfo.NumberOfAckReceive);
int start = range.Item1;
int end = range.Item2;
for (int i = start; i <= end; i++)
{
if (queue.TryRemove(i, out var datagram))
{
//if (Log.IsDebugEnabled)
// Log.DebugFormat("ACK, on datagram #{0} for {2}. Queue size={1}", i, queue.Count, player.Username);
CalculateRto(session, datagram);
datagram.PutPool();
}
else
{
if (Log.IsDebugEnabled)
{
Log.WarnFormat("ACK, Failed to remove datagram #{0} for {2}. Queue size={1}", i, queue.Count, session.Username);
}
}
}
}
//ack.PutPool();
session.ResendCount = 0;
session.WaitForAck = false;
}
internal void SendDatagram(PlayerNetworkSession session, Datagram datagram)
{
if (datagram.MessageParts.Count == 0)
{
datagram.PutPool();
Log.WarnFormat("Failed to resend #{0}", datagram.Header.datagramSequenceNumber.IntValue());
return;
}
if (datagram.TransmissionCount > 10)
{
if (Log.IsDebugEnabled)
{
Log.WarnFormat("Retransmission count exceeded. No more resend of #{0} Type: {2} (0x{2:x2}) for {1}",
datagram.Header.datagramSequenceNumber.IntValue(),
session.Username,
datagram.FirstMessageId);
}
datagram.PutPool();
Interlocked.Increment(ref ServerInfo.NumberOfFails);
return;
}
datagram.Header.datagramSequenceNumber = Interlocked.Increment(ref session.DatagramSequenceNumber);
datagram.TransmissionCount++;
datagram.RetransmitImmediate = false;
//byte[] data = datagram.Encode();
byte[] data;
var lenght = (int)datagram.GetEncoded(out data);
datagram.Timer.Restart();
if (!session.WaitingForAcksQueue.TryAdd(datagram.Header.datagramSequenceNumber.IntValue(), datagram))
{
Log.Warn(string.Format("Datagram sequence unexpectedly existed in the ACK/NAK queue already {0}", datagram.Header.datagramSequenceNumber.IntValue()));
}
lock (session.SyncRoot)
{
SendData(data, lenght, session.EndPoint);
}
}
private void HandleConnectedPackage(PlayerNetworkSession playerSession, ConnectedPackage package)
{
Player player = playerSession.Player;
List <Package> messages = package.Messages;
foreach (var message in messages)
{
if (message is SplitPartPackage)
{
HandleSplitMessage(playerSession, package, (SplitPartPackage)message, player);
continue;
}
message.Timer.Restart();
HandlePackage(message, playerSession);
}
}
internal void SendDatagram(PlayerNetworkSession session, Datagram datagram)
{
if (datagram.MessageParts.Count == 0)
{
datagram.PutPool();
Log.WarnFormat("Failed to resend #{0}", datagram.Header.datagramSequenceNumber.IntValue());
return;
}
if (datagram.TransmissionCount > 10)
{
if (Log.IsDebugEnabled)
{
Log.WarnFormat("TIMEOUT, Retransmission count remove from ACK queue #{0} Type: {2} (0x{2:x2}) for {1}",
datagram.Header.datagramSequenceNumber.IntValue(),
session.Username,
datagram.FirstMessageId);
}
datagram.PutPool();
Interlocked.Increment(ref ServerInfo.NumberOfFails);
return;
}
datagram.Header.datagramSequenceNumber = Interlocked.Increment(ref session.DatagramSequenceNumber);
datagram.TransmissionCount++;
byte[] data = datagram.Encode();
datagram.Timer.Restart();
if (!session.WaitingForAcksQueue.TryAdd(datagram.Header.datagramSequenceNumber.IntValue(), datagram))
{
Log.Warn(string.Format("Datagram sequence unexpectedly existed in the ACK/NAK queue already {0}", datagram.Header.datagramSequenceNumber.IntValue()));
}
lock (session.SyncRoot)
{
SendData(data, session.EndPoint);
Thread.Sleep(12);
}
}
private void HandleNak(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null)
{
return;
}
Nak nak = Nak.CreateObject();
nak.Reset();
nak.Decode(receiveBytes);
var queue = session.WaitingForAcksQueue;
foreach (Tuple <int, int> range in nak.ranges)
{
Interlocked.Increment(ref ServerInfo.NumberOfNakReceive);
int start = range.Item1;
int end = range.Item2;
for (int i = start; i <= end; i++)
{
if (queue.TryGetValue(i, out var datagram))
{
CalculateRto(session, datagram);
datagram.RetransmitImmediate = true;
}
else
{
if (Log.IsDebugEnabled)
{
Log.WarnFormat("NAK, no datagram #{0} for {1}", i, session.Username);
}
}
}
}
nak.PutPool();
}
internal void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
if (message == null)
{
return;
}
if (message.Reliability == Reliability.ReliableOrdered)
{
if (ForceOrderingForAll == false && (playerSession.CryptoContext == null || playerSession.CryptoContext.UseEncryption == false))
{
playerSession.AddToProcessing(message);
}
else
{
FastThreadPool.QueueUserWorkItem(() => playerSession.AddToProcessing(message));
}
return;
}
playerSession.HandlePackage(message, playerSession);
}
private void HandleAck(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null) return;
Player player = session.Player;
if (player == null) return;
Ack ack = Ack.CreateObject();
ack.Reset();
ack.Decode(receiveBytes);
var queue = session.WaitingForAcksQueue;
foreach (Tuple<int, int> range in ack.ranges)
{
ServerInfo.NumberOfAckReceive++;
int start = range.Item1;
int end = range.Item2;
for (int i = start; i <= end; i++)
{
Datagram datagram;
if (queue.TryRemove(i, out datagram))
{
//if (Log.IsDebugEnabled)
// Log.DebugFormat("ACK, on datagram #{0} for {2}. Queue size={1}", i, queue.Count, player.Username);
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = player.Rtt;
long RTTVar = player.RttVar;
player.Rtt = (long) (RTT*0.875 + rtt*0.125);
player.RttVar = (long) (RTTVar*0.875 + Math.Abs(RTT - rtt)*0.125);
player.Rto = player.Rtt + 4*player.RttVar + 100; // SYNC time in the end
datagram.PutPool();
}
else
{
if (Log.IsDebugEnabled)
Log.WarnFormat("ACK, Failed to remove datagram #{0} for {2}. Queue size={1}", i, queue.Count, player.Username);
}
}
}
ack.PutPool();
session.ResendCount = 0;
session.WaitForAck = false;
}
private void HandleNak(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null) return;
Player player = session.Player;
if (player == null) return;
Nak nak = Nak.CreateObject();
nak.Reset();
nak.Decode(receiveBytes);
var queue = session.WaitingForAcksQueue;
foreach (Tuple<int, int> range in nak.ranges)
{
ServerInfo.NumberOfNakReceive++;
int start = range.Item1;
int end = range.Item2;
for (int i = start; i <= end; i++)
{
session.ErrorCount++;
// HACK: Just to make sure we aren't getting unessecary load on the queue during heavy buffering.
if (ServerInfo.AvailableBytes > 1000) continue;
Datagram datagram;
if (queue.TryGetValue(i, out datagram))
{
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = player.Rtt;
long RTTVar = player.RttVar;
player.Rtt = (long) (RTT*0.875 + rtt*0.125);
player.RttVar = (long) (RTTVar*0.875 + Math.Abs(RTT - rtt)*0.125);
player.Rto = player.Rtt + 4*player.RttVar + 100; // SYNC time in the end
//if (Log.IsDebugEnabled)
// Log.ErrorFormat("NAK, resending datagram #{0} for {1}, MTU: {2}", i, player.Username, session.Mtuize);
//SendDatagram(session, datagram, false);
}
else
{
if (Log.IsDebugEnabled)
Log.WarnFormat("NAK, no datagram #{0} to resend for {1}", i, player.Username);
}
}
}
nak.PutPool();
}
private void HandleSplitMessage(PlayerNetworkSession playerSession, ConnectedPackage package, SplitPartPackage splitMessage, Player player)
{
int spId = package._splitPacketId;
int spIdx = package._splitPacketIndex;
int spCount = package._splitPacketCount;
if (!playerSession.Splits.ContainsKey(spId))
{
playerSession.Splits.TryAdd(spId, new SplitPartPackage[spCount]);
}
SplitPartPackage[] spPackets = playerSession.Splits[spId];
spPackets[spIdx] = splitMessage;
bool haveEmpty = false;
for (int i = 0; i < spPackets.Length; i++)
{
haveEmpty = haveEmpty || spPackets[i] == null;
}
if (!haveEmpty)
{
Log.DebugFormat("Got all {0} split packages for split ID: {1}", spCount, spId);
SplitPartPackage[] waste;
playerSession.Splits.TryRemove(spId, out waste);
MemoryStream stream = new MemoryStream();
for (int i = 0; i < spPackets.Length; i++)
{
SplitPartPackage splitPartPackage = spPackets[i];
byte[] buf = splitPartPackage.Message;
if (buf == null)
{
Log.Error("Expected bytes in splitpart, but got none");
continue;
}
stream.Write(buf, 0, buf.Length);
splitPartPackage.PutPool();
}
byte[] buffer = stream.ToArray();
try
{
Package fullMessage = PackageFactory.CreatePackage(buffer[1], buffer) ?? new UnknownPackage(buffer[1], buffer);
Log.Debug($"0x{fullMessage.Id:x2}\n{Package.HexDump(buffer)}");
fullMessage.DatagramSequenceNumber = package._datagramSequenceNumber;
fullMessage.ReliableMessageNumber = package._reliableMessageNumber;
fullMessage.OrderingChannel = package._orderingChannel;
fullMessage.OrderingIndex = package._orderingIndex;
HandlePackage(fullMessage, playerSession);
fullMessage.PutPool();
}
catch (Exception e)
{
player.Disconnect("Bad package received from client.");
}
}
}
private void DelayedProcessing(PlayerNetworkSession playerSession, ConnectedPackage package)
{
Player player = playerSession.Player;
if (ForwardAllPlayers)
{
player.SendPackage(new McpeTransfer
{
endpoint = ForwardTarget
}, true);
return;
}
List<Package> messages = package.Messages;
foreach (var message in messages)
{
//message.DatagramSequenceNumber = package._datagramSequenceNumber;
//message.ReliableMessageNumber = package._reliableMessageNumber;
//message.OrderingChannel = package._orderingChannel;
//message.OrderingIndex = package._orderingIndex;
if (message is SplitPartPackage)
{
HandleSplitMessage(playerSession, package, (SplitPartPackage) message, player);
continue;
}
message.Timer.Restart();
HandlePackage(message, playerSession);
message.PutPool(); // Handled in HandlePacket now()
}
}
private void HandleRakNetMessage(IPEndPoint senderEndpoint, OpenConnectionRequest2 incoming)
{
PlayerNetworkSession session;
lock (_playerSessions)
{
DateTime trash;
if (!_connectionAttemps.TryRemove(senderEndpoint, out trash))
{
Log.WarnFormat("Unexpected connection request packet from {0}. Probably a resend.", senderEndpoint.Address);
return;
}
if (_playerSessions.TryGetValue(senderEndpoint, out session))
{
// Already connecting, then this is just a duplicate
if (session.State == ConnectionState.Connecting /* && DateTime.UtcNow < session.LastUpdatedTime + TimeSpan.FromSeconds(2)*/)
{
return;
}
Log.InfoFormat("Unexpected session from {0}. Removing old session and disconnecting old player.", senderEndpoint.Address);
Player oldPlayer = session.Player;
if (oldPlayer != null)
{
oldPlayer.Disconnect("Reconnecting.", false);
}
_playerSessions.TryRemove(session.EndPoint, out session);
}
session = new PlayerNetworkSession(null, senderEndpoint)
{
State = ConnectionState.Connecting,
LastUpdatedTime = DateTime.UtcNow,
Mtuize = incoming.mtuSize
};
_playerSessions.TryAdd(senderEndpoint, session);
}
Player player = PlayerFactory.CreatePlayer(this, senderEndpoint, incoming.mtuSize);
player.ClientGuid = incoming.clientGuid;
player.NetworkSession = session;
session.Player = player;
var reply = OpenConnectionReply2.CreateObject();
reply.serverGuid = 12345;
reply.clientendpoint = senderEndpoint;
reply.mtuSize = incoming.mtuSize;
reply.doSecurityAndHandshake = new byte[1];
var data = reply.Encode();
reply.PutPool();
TraceSend(reply);
SendData(data, senderEndpoint);
}
private void HandleNak(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null) return;
Player player = session.Player;
if (player == null) return;
Nak nak = Nak.CreateObject();
nak.Decode(receiveBytes);
int ackSeqNo = nak.sequenceNumber.IntValue();
int toAckSeqNo = nak.toSequenceNumber.IntValue();
if (nak.onlyOneSequence == 1) toAckSeqNo = ackSeqNo;
nak.PutPool();
var queue = session.WaitingForAcksQueue;
if (Log.IsDebugEnabled)
Log.DebugFormat("NAK from Player {0} ({5}) #{1}-{2} IsOnlyOne {3} Count={4}", player.Username, ackSeqNo, toAckSeqNo, nak.onlyOneSequence, nak.count, player.Rtt);
for (int i = ackSeqNo; i <= toAckSeqNo; i++)
{
session.ErrorCount++;
Datagram datagram;
if (queue.TryRemove(i, out datagram))
{
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = player.Rtt;
long RTTVar = player.RttVar;
player.Rtt = (long) (RTT*0.875 + rtt*0.125);
player.RttVar = (long) (RTTVar*0.875 + Math.Abs(RTT - rtt)*0.125);
player.Rto = player.Rtt + 4*player.RttVar + 10; // SYNC time in the end
SendDatagram(session, datagram);
}
else
{
if (Log.IsDebugEnabled)
Log.DebugFormat("NAK, no datagram #{0} to resend for {1}", i, player.Username);
}
}
}
internal void HandlePackage(int datagramSequenceNumber, Package message, PlayerNetworkSession playerSession)
{
TraceReceive(message);
message.DatagramSequenceNumber = datagramSequenceNumber;
if (typeof (UnknownPackage) == message.GetType())
{
message.PutPool();
return;
}
if (typeof (McpeBatch) == message.GetType())
{
McpeBatch batch = (McpeBatch) message;
var messages = new List<Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = new MemoryStream();
defStream2.CopyTo(destination);
byte[] internalBuffer = destination.ToArray();
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer) ?? new UnknownPackage(internalBuffer[0], internalBuffer));
}
foreach (var msg in messages)
{
HandlePackage(datagramSequenceNumber, msg, playerSession);
}
batch.PutPool();
return;
}
message.Source = "HandlePackage";
playerSession.Player.HandlePackage(message);
message.PutPool();
}
internal void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
if (message == null) return;
TraceReceive(message);
if (typeof (UnknownPackage) == message.GetType())
{
return;
}
if (typeof (McpeBatch) == message.GetType())
{
McpeBatch batch = (McpeBatch) message;
var messages = new List<Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = new MemoryStream();
defStream2.CopyTo(destination);
destination.Position = 0;
NbtBinaryReader reader = new NbtBinaryReader(destination, true);
int len = reader.ReadInt32();
byte[] internalBuffer = reader.ReadBytes(len);
//byte[] internalBuffer = destination.ToArray();
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer) ?? new UnknownPackage(internalBuffer[0], internalBuffer));
if (destination.Length > destination.Position) throw new Exception("Have more data");
}
foreach (var msg in messages)
{
msg.DatagramSequenceNumber = batch.DatagramSequenceNumber;
msg.OrderingChannel = batch.OrderingChannel;
msg.OrderingIndex = batch.OrderingIndex;
HandlePackage(msg, playerSession);
msg.PutPool();
}
return;
}
Player player = playerSession.Player;
if (player != null) player.HandlePackage(message);
}
private void DelayedProcessing(PlayerNetworkSession playerSession, ConnectedPackage package)
{
int datagramSequenceNumber = 0;
lock (playerSession.ProcessSyncRoot)
{
datagramSequenceNumber = package._datagramSequenceNumber;
if (datagramSequenceNumber > 0 && playerSession.LastDatagramNumber >= datagramSequenceNumber)
{
Log.DebugFormat("Sequence out of order {0}", package._datagramSequenceNumber);
}
else if (datagramSequenceNumber > 0)
{
playerSession.LastDatagramNumber = package._datagramSequenceNumber;
}
}
if (ForwardAllPlayers)
{
playerSession.Player.SendPackage(new McpeTransfer
{
endpoint = ForwardTarget
}, true);
return;
}
List<Package> messages = package.Messages;
foreach (var message in messages)
{
if (message is SplitPartPackage)
{
message.Source = "Receive SplitPartPackage";
SplitPartPackage splitMessage = message as SplitPartPackage;
int spId = package._splitPacketId;
int spIdx = package._splitPacketIndex;
int spCount = package._splitPacketCount;
if (!playerSession.Splits.ContainsKey(spId))
{
playerSession.Splits.Add(spId, new SplitPartPackage[spCount]);
}
SplitPartPackage[] spPackets = playerSession.Splits[spId];
spPackets[spIdx] = splitMessage;
bool haveEmpty = false;
for (int i = 0; i < spPackets.Length; i++)
{
haveEmpty = haveEmpty || spPackets[i] == null;
}
if (!haveEmpty)
{
Log.DebugFormat("Got all {0} split packages for split ID: {1}", spCount, spId);
MemoryStream stream = new MemoryStream();
for (int i = 0; i < spPackets.Length; i++)
{
SplitPartPackage splitPartPackage = spPackets[i];
byte[] buf = splitPartPackage.Message;
stream.Write(buf, 0, buf.Length);
splitPartPackage.PutPool();
}
playerSession.Splits.Remove(spId);
byte[] buffer = stream.ToArray();
var fullMessage = PackageFactory.CreatePackage(buffer[0], buffer) ?? new UnknownPackage(buffer[0], buffer);
HandlePackage(datagramSequenceNumber, fullMessage, playerSession);
}
continue;
}
message.Timer.Restart();
HandlePackage(datagramSequenceNumber, message, playerSession);
//message.PutPool(); // Handled in HandlePacket now()
}
package.PutPool();
}
internal void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
Player player = playerSession.Player;
if (message == null)
{
return;
}
if (typeof (McpeWrapper) == message.GetType())
{
McpeWrapper batch = (McpeWrapper) message;
// Get bytes
byte[] payload = batch.payload;
if (playerSession.CryptoContext != null && Config.GetProperty("UseEncryption", true))
{
payload = CryptoUtils.Decrypt(payload, playerSession.CryptoContext);
}
//if (Log.IsDebugEnabled)
// Log.Debug($"0x{payload[0]:x2}\n{Package.HexDump(payload)}");
var msg = PackageFactory.CreatePackage(payload[0], payload, "mcpe") ?? new UnknownPackage(payload[0], payload);
HandlePackage(msg, playerSession);
msg.PutPool();
return;
}
if (typeof (UnknownPackage) == message.GetType())
{
UnknownPackage packet = (UnknownPackage) message;
Log.Warn($"Received unknown package 0x{message.Id:X2}\n{Package.HexDump(packet.Message)}");
return;
}
if (typeof (McpeBatch) == message.GetType())
{
Log.Debug("Handle MCPE batch message");
McpeBatch batch = (McpeBatch) message;
var messages = new List<Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = MiNetServer.MemoryStreamManager.GetStream();
defStream2.CopyTo(destination);
destination.Position = 0;
NbtBinaryReader reader = new NbtBinaryReader(destination, true);
while (destination.Position < destination.Length)
{
int len = reader.ReadInt32();
byte[] internalBuffer = reader.ReadBytes(len);
//if (Log.IsDebugEnabled)
// Log.Debug($"0x{internalBuffer[0]:x2}\n{Package.HexDump(internalBuffer)}");
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer, "mcpe") ?? new UnknownPackage(internalBuffer[0], internalBuffer));
}
if (destination.Length > destination.Position) throw new Exception("Have more data");
}
foreach (var msg in messages)
{
msg.DatagramSequenceNumber = batch.DatagramSequenceNumber;
msg.OrderingChannel = batch.OrderingChannel;
msg.OrderingIndex = batch.OrderingIndex;
HandlePackage(msg, playerSession);
msg.PutPool();
}
return;
}
if (player != null) player.HandlePackage(message);
}
private void HandleSplitMessage(PlayerNetworkSession playerSession, SplitPartPackage splitMessage)
{
int spId = splitMessage.SplitId;
int spIdx = splitMessage.SplitIdx;
int spCount = splitMessage.SplitCount;
Int24 sequenceNumber = splitMessage.DatagramSequenceNumber;
Reliability reliability = splitMessage.Reliability;
Int24 reliableMessageNumber = splitMessage.ReliableMessageNumber;
Int24 orderingIndex = splitMessage.OrderingIndex;
byte orderingChannel = splitMessage.OrderingChannel;
SplitPartPackage[] spPackets;
bool haveEmpty = false;
// Need sync for this part since they come very fast, and very close in time.
// If no synk, will often detect complete message two times (or more).
lock (playerSession.Splits)
{
if (!playerSession.Splits.ContainsKey(spId))
{
playerSession.Splits.TryAdd(spId, new SplitPartPackage[spCount]);
}
spPackets = playerSession.Splits[spId];
if (spPackets[spIdx] != null)
{
Log.Debug("Already had splitpart (resent). Ignore this part.");
return;
}
spPackets[spIdx] = splitMessage;
for (int i = 0; i < spPackets.Length; i++)
{
haveEmpty = haveEmpty || spPackets[i] == null;
}
}
if (!haveEmpty)
{
Log.DebugFormat("Got all {0} split packages for split ID: {1}", spCount, spId);
SplitPartPackage[] waste;
playerSession.Splits.TryRemove(spId, out waste);
using (MemoryStream stream = MemoryStreamManager.GetStream())
{
for (int i = 0; i < spPackets.Length; i++)
{
SplitPartPackage splitPartPackage = spPackets[i];
byte[] buf = splitPartPackage.Message;
if (buf == null)
{
Log.Error("Expected bytes in splitpart, but got none");
continue;
}
stream.Write(buf, 0, buf.Length);
splitPartPackage.PutPool();
}
byte[] buffer = stream.ToArray();
try
{
ConnectedPackage newPackage = ConnectedPackage.CreateObject();
newPackage._datagramSequenceNumber = sequenceNumber;
newPackage._reliability = reliability;
newPackage._reliableMessageNumber = reliableMessageNumber;
newPackage._orderingIndex = orderingIndex;
newPackage._orderingChannel = (byte)orderingChannel;
newPackage._hasSplit = false;
Package fullMessage = PackageFactory.CreatePackage(buffer[0], buffer, "raknet") ??
new UnknownPackage(buffer[0], buffer);
fullMessage.DatagramSequenceNumber = sequenceNumber;
fullMessage.Reliability = reliability;
fullMessage.ReliableMessageNumber = reliableMessageNumber;
fullMessage.OrderingIndex = orderingIndex;
fullMessage.OrderingChannel = orderingChannel;
newPackage.Messages = new List <Package>();
newPackage.Messages.Add(fullMessage);
Log.Debug(
$"Assembled split package {newPackage._reliability} message #{newPackage._reliableMessageNumber}, Chan: #{newPackage._orderingChannel}, OrdIdx: #{newPackage._orderingIndex}");
HandleConnectedPackage(playerSession, newPackage);
newPackage.PutPool();
}
catch (Exception e)
{
Log.Error("Error during split message parsing", e);
if (Log.IsDebugEnabled)
{
Log.Debug($"0x{buffer[0]:x2}\n{Package.HexDump(buffer)}");
}
playerSession.Disconnect("Bad package received from client.", false);
}
}
}
}
private void SendDatagram(PlayerNetworkSession session, Datagram datagram, bool updateCounter)
{
if (datagram.MessageParts.Count == 0)
{
datagram.PutPool();
Log.WarnFormat("Failed to resend #{0}", datagram.Header.datagramSequenceNumber.IntValue());
return;
}
if (updateCounter)
{
datagram.Header.datagramSequenceNumber = Interlocked.Increment(ref session.DatagramSequenceNumber);
}
datagram.TransmissionCount++;
byte[] data = datagram.Encode();
datagram.Timer.Restart();
if (!session.WaitingForAcksQueue.TryAdd(datagram.Header.datagramSequenceNumber.IntValue(), datagram))
{
Log.Warn(string.Format("Datagram sequence unexpectedly existed in the ACK/NAK queue already {0}", datagram.Header.datagramSequenceNumber.IntValue()));
}
lock (session.SyncRoot)
{
SendData(data, session.EndPoint, session.SyncRoot);
int sndDelay = (int) (50f/4f);
sndDelay = sndDelay + (20*(1/(datagram.Header.datagramSequenceNumber.IntValue() + 1)));
//Thread.Sleep(sndDelay); // Really important to slow down speed a bit
}
}
private void Update(object state)
{
if (!Monitor.TryEnter(_updateGlobalLock))
{
return;
}
_forceQuitTimer.Restart();
try
{
long now = DateTime.UtcNow.Ticks / TimeSpan.TicksPerMillisecond;
Parallel.ForEach(_playerSessions, delegate(KeyValuePair <IPEndPoint, PlayerNetworkSession> pair)
{
PlayerNetworkSession session = pair.Value;
if (session == null)
{
return;
}
if (session.Evicted)
{
return;
}
Player player = session.Player;
long lastUpdate = session.LastUpdatedTime.Ticks / TimeSpan.TicksPerMillisecond;
bool serverHasNoLag = ServerInfo.AvailableBytes < 1000;
if (serverHasNoLag && lastUpdate + InacvitityTimeout + 3000 < now)
{
session.Evicted = true;
// Disconnect user
ThreadPool.QueueUserWorkItem(delegate(object o)
{
PlayerNetworkSession s = o as PlayerNetworkSession;
if (s != null)
{
Player p = s.Player;
if (p != null)
{
p.Disconnect("You've been kicked with reason: Network timeout.");
}
else
{
if (ServerInfo.PlayerSessions.TryRemove(session.EndPoint, out session))
{
session.Player = null;
session.State = ConnectionState.Unconnected;
session.Evicted = true;
session.Clean();
}
}
}
}, session);
return;
}
if (serverHasNoLag && session.State != ConnectionState.Connected && player != null && lastUpdate + 3000 < now)
{
ThreadPool.QueueUserWorkItem(delegate(object o)
{
PlayerNetworkSession s = o as PlayerNetworkSession;
if (s != null)
{
Player p = s.Player;
if (p != null)
{
p.Disconnect("You've been kicked with reason: Lost connection.");
}
}
}, session);
return;
}
if (player == null)
{
return;
}
if (serverHasNoLag && lastUpdate + InacvitityTimeout < now && !session.WaitForAck)
{
player.DetectLostConnection();
session.WaitForAck = true;
}
if (player.Rto == 0)
{
return;
}
long rto = Math.Max(100, player.Rto);
var queue = session.WaitingForAcksQueue;
foreach (KeyValuePair <int, Datagram> datagramPair in queue)
{
// We don't do too much processing in each step, becasue one bad queue will hold the others.
//if (_forceQuitTimer.ElapsedMilliseconds > 100)
//{
// Log.WarnFormat("Update aborted early");
// return;
//}
var datagram = datagramPair.Value;
if (!datagram.Timer.IsRunning)
{
Log.ErrorFormat("Timer not running for #{0}", datagram.Header.datagramSequenceNumber);
datagram.Timer.Restart();
continue;
}
if (player.Rtt == -1)
{
return;
}
//if (session.WaitForAck) return;
long elapsedTime = datagram.Timer.ElapsedMilliseconds;
long datagramTimout = rto * (datagram.TransmissionCount + session.ResendCount + 1);
datagramTimout = Math.Min(datagramTimout, 3000);
//if(elapsedTime > 5000)
//{
// Datagram deleted;
// queue.TryRemove(datagram.Header.datagramSequenceNumber, out deleted);
//}
//else
if (serverHasNoLag && elapsedTime >= datagramTimout)
{
//if (session.WaitForAck) return;
//session.WaitForAck = session.ResendCount++ > 3;
Datagram deleted;
if (queue.TryRemove(datagram.Header.datagramSequenceNumber, out deleted))
{
session.ErrorCount++;
if (deleted.TransmissionCount > 3)
{
if (Log.IsDebugEnabled)
{
Log.WarnFormat("TIMEOUT, Retransmission count remove from ACK queue #{0} Type: {2} (0x{2:x2}) for {1} ({3} > {4}) RTO {5}",
deleted.Header.datagramSequenceNumber.IntValue(),
player.Username,
deleted.FirstMessageId,
elapsedTime,
datagramTimout,
rto);
}
deleted.PutPool();
//session.WaitForAck = true;
Interlocked.Increment(ref ServerInfo.NumberOfFails);
continue;
}
if (!session.Evicted)
{
ThreadPool.QueueUserWorkItem(delegate(object data)
{
if (Log.IsDebugEnabled)
{
Log.WarnFormat("TIMEOUT, Resent #{0} Type: {2} (0x{2:x2}) for {1} ({3} > {4}) RTO {5}",
deleted.Header.datagramSequenceNumber.IntValue(),
player.Username,
deleted.FirstMessageId,
elapsedTime,
datagramTimout,
player.Rto);
}
SendDatagram(session, (Datagram)data);
Interlocked.Increment(ref ServerInfo.NumberOfResends);
}, datagram);
}
}
}
}
});
}
finally
{
if (_forceQuitTimer.ElapsedMilliseconds > 100)
{
Log.WarnFormat("Update took unexpected long time: {0}", _forceQuitTimer.ElapsedMilliseconds);
}
Monitor.Exit(_updateGlobalLock);
_cleanerTimer.Change(10, Timeout.Infinite);
}
}
private void EnqueueAck(PlayerNetworkSession session, int sequenceNumber)
{
ServerInfo.NumberOfAckSent++;
session.PlayerAckQueue.Enqueue(sequenceNumber);
}
/// <summary>
/// Processes a message.
/// </summary>
/// <param name="receiveBytes">The received bytes.</param>
/// <param name="senderEndpoint">The sender's endpoint.</param>
/// <exception cref="System.Exception">Receive ERROR, NAK in wrong place</exception>
private void ProcessMessage(byte[] receiveBytes, IPEndPoint senderEndpoint)
{
byte msgId = receiveBytes[0];
if (msgId == 0xFE)
{
Log.WarnFormat("A query detected from: {0}", senderEndpoint.Address);
HandleQuery(receiveBytes, senderEndpoint);
}
else if (msgId <= (byte)DefaultMessageIdTypes.ID_USER_PACKET_ENUM)
{
DefaultMessageIdTypes msgIdType = (DefaultMessageIdTypes)msgId;
Package message = PackageFactory.CreatePackage(msgId, receiveBytes);
TraceReceive(message);
switch (msgIdType)
{
case DefaultMessageIdTypes.ID_UNCONNECTED_PING:
case DefaultMessageIdTypes.ID_UNCONNECTED_PING_OPEN_CONNECTIONS:
{
UnconnectedPing incoming = (UnconnectedPing)message;
//TODO: This needs to be verified with RakNet first
//response.sendpingtime = msg.sendpingtime;
//response.sendpongtime = DateTimeOffset.UtcNow.Ticks / TimeSpan.TicksPerMillisecond;
var packet = new UnconnectedPong
{
serverId = 22345,
pingId = incoming.pingId /*incoming.pingId*/,
serverName = string.Format(@"MCPE;{0};27;0.11.1;{1};{2}", Motd, _playerSessions.Count, 1000)
};
var data = packet.Encode();
TraceSend(packet);
SendData(data, senderEndpoint, _listener);
break;
}
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_1:
{
OpenConnectionRequest1 incoming = (OpenConnectionRequest1)message;
_isPerformanceTest = _isPerformanceTest || incoming.raknetProtocolVersion == byte.MaxValue;
var packet = new OpenConnectionReply1
{
serverGuid = 12345,
mtuSize = incoming.mtuSize,
serverHasSecurity = 0
};
var data = packet.Encode();
TraceSend(packet);
SendData(data, senderEndpoint, _listener);
break;
}
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_2:
{
OpenConnectionRequest2 incoming = (OpenConnectionRequest2)message;
Log.WarnFormat("New connection from: {0} {1}", senderEndpoint.Address, incoming.clientUdpPort);
var packet = new OpenConnectionReply2
{
serverGuid = 12345,
mtuSize = incoming.mtuSize,
doSecurityAndHandshake = new byte[0]
};
PlayerNetworkSession session = null;
lock (_playerSessions)
{
if (_playerSessions.ContainsKey(senderEndpoint))
{
PlayerNetworkSession value;
_playerSessions.TryRemove(senderEndpoint, out value);
value.Player.HandleDisconnectionNotification();
Log.Info("Removed ghost");
}
session = new PlayerNetworkSession(new Player(this, senderEndpoint, _levels[_random.Next(0, _levels.Count)], _pluginManager, incoming.mtuSize), senderEndpoint);
session.LastUpdatedTime = DateTime.UtcNow;
session.Mtuize = incoming.mtuSize;
_playerSessions.TryAdd(senderEndpoint, session);
}
var data = packet.Encode();
TraceSend(packet);
SendData(data, senderEndpoint, session.SyncRoot);
break;
}
default:
Log.ErrorFormat("Receive unexpected packet with ID: {0} (0x{0:x2}) from {1}", msgId, senderEndpoint.Address);
break;
}
if (message != null)
{
message.PutPool();
}
else
{
Log.ErrorFormat("Receive unexpected packet with ID: {0} (0x{0:x2}) from {1}", msgId, senderEndpoint.Address);
}
}
else
{
DatagramHeader header = new DatagramHeader(receiveBytes[0]);
if (!header.isACK && !header.isNAK && header.isValid)
{
if (receiveBytes[0] == 0xa0)
{
throw new Exception("Receive ERROR, NAK in wrong place");
}
ConnectedPackage package = ConnectedPackage.CreateObject();
package.Decode(receiveBytes);
List <Package> messages = package.Messages;
if (messages.Count == 1)
{
McpeBatch batch = messages.First() as McpeBatch;
if (batch != null)
{
messages = new List <Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = new MemoryStream();
defStream2.CopyTo(destination);
byte[] internalBuffer = destination.ToArray();
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer) ?? new UnknownPackage(internalBuffer[0], internalBuffer));
}
}
}
// IF reliable code below is enabled, useItem start sending doubles
// for some unknown reason.
//Reliability reliability = package._reliability;
//if (reliability == Reliability.Reliable
// || reliability == Reliability.ReliableSequenced
// || reliability == Reliability.ReliableOrdered
// )
{
EnqueueAck(senderEndpoint, package._datagramSequenceNumber);
}
PlayerNetworkSession playerSession;
if (_playerSessions.TryGetValue(senderEndpoint, out playerSession))
{
foreach (var message in messages)
{
if (message is SplitPartPackage)
{
SplitPartPackage splitMessage = message as SplitPartPackage;
int spId = package._splitPacketId;
int spIdx = package._splitPacketIndex;
int spCount = package._splitPacketCount;
if (!playerSession.Splits.ContainsKey(spId))
{
playerSession.Splits.Add(spId, new SplitPartPackage[spCount]);
}
SplitPartPackage[] spPackets = playerSession.Splits[spId];
spPackets[spIdx] = splitMessage;
bool haveEmpty = false;
for (int i = 0; i < spPackets.Length; i++)
{
haveEmpty = haveEmpty || spPackets[i] == null;
}
if (!haveEmpty)
{
Log.DebugFormat("Got all {0} split packages for split ID: {1}", spCount, spId);
MemoryStream stream = new MemoryStream();
for (int i = 0; i < spPackets.Length; i++)
{
byte[] buf = spPackets[i].Message;
stream.Write(buf, 0, buf.Length);
}
byte[] buffer = stream.ToArray();
var fullMessage = PackageFactory.CreatePackage(buffer[0], buffer) ?? new UnknownPackage(buffer[0], buffer);
HandlePackage(fullMessage, playerSession);
}
continue;
}
message.Timer.Restart();
HandlePackage(message, playerSession);
message.PutPool();
}
}
package.PutPool();
}
else if (header.isACK && header.isValid)
{
HandleAck(receiveBytes, senderEndpoint);
}
else if (header.isNAK && header.isValid)
{
HandleNak(receiveBytes, senderEndpoint);
}
else if (!header.isValid)
{
Log.Warn("!!!! ERROR, Invalid header !!!!!");
}
}
}
private void DelayedProcessing(PlayerNetworkSession playerSession, ConnectedPackage package)
{
Player player = playerSession.Player;
if (ForwardAllPlayers)
{
player.SendPackage(new McpeTransfer
{
endpoint = ForwardTarget
}, true);
return;
}
List<Package> messages = package.Messages;
foreach (var message in messages)
{
message.DatagramSequenceNumber = package._datagramSequenceNumber;
message.OrderingChannel = package._orderingChannel;
message.OrderingIndex = package._orderingIndex;
if (message is SplitPartPackage)
{
SplitPartPackage splitMessage = message as SplitPartPackage;
int spId = package._splitPacketId;
int spIdx = package._splitPacketIndex;
int spCount = package._splitPacketCount;
if (!playerSession.Splits.ContainsKey(spId))
{
playerSession.Splits.Add(spId, new SplitPartPackage[spCount]);
}
SplitPartPackage[] spPackets = playerSession.Splits[spId];
spPackets[spIdx] = splitMessage;
bool haveEmpty = false;
for (int i = 0; i < spPackets.Length; i++)
{
haveEmpty = haveEmpty || spPackets[i] == null;
}
if (!haveEmpty)
{
Log.DebugFormat("Got all {0} split packages for split ID: {1}", spCount, spId);
MemoryStream stream = new MemoryStream();
for (int i = 0; i < spPackets.Length; i++)
{
SplitPartPackage splitPartPackage = spPackets[i];
byte[] buf = splitPartPackage.Message;
stream.Write(buf, 0, buf.Length);
splitPartPackage.PutPool();
}
playerSession.Splits.Remove(spId);
byte[] buffer = stream.ToArray();
try
{
Package fullMessage = PackageFactory.CreatePackage(buffer[0], buffer) ?? new UnknownPackage(buffer[0], buffer);
fullMessage.DatagramSequenceNumber = package._datagramSequenceNumber;
fullMessage.OrderingChannel = package._orderingChannel;
fullMessage.OrderingIndex = package._orderingIndex;
HandlePackage(fullMessage, playerSession);
fullMessage.PutPool();
}
catch (Exception e)
{
player.Disconnect("Bad package received from client.");
}
}
continue;
}
message.Timer.Restart();
HandlePackage(message, playerSession);
message.PutPool(); // Handled in HandlePacket now()
}
}
private void SendDatagram(PlayerNetworkSession session, Datagram datagram)
{
if (datagram.MessageParts.Count == 0)
{
datagram.PutPool();
Log.WarnFormat("Failed to resend #{0}", datagram.Header.datagramSequenceNumber.IntValue());
return;
}
datagram.Header.datagramSequenceNumber = Interlocked.Increment(ref session.DatagramSequenceNumber);
datagram.TransmissionCount++;
byte[] data = datagram.Encode();
datagram.Timer.Restart();
if (!session.WaitingForAcksQueue.TryAdd(datagram.Header.datagramSequenceNumber.IntValue(), datagram))
{
Log.Warn(string.Format("Datagram sequence unexpectedly existed in the ACK/NAK queue already {0}", datagram.Header.datagramSequenceNumber.IntValue()));
}
lock (session.SyncRoot)
{
SendData(data, session.EndPoint);
}
}
private void HandleRakNetMessage(byte[] receiveBytes, IPEndPoint senderEndpoint, byte msgId)
{
DefaultMessageIdTypes msgIdType = (DefaultMessageIdTypes) msgId;
Package message = PackageFactory.CreatePackage(msgId, receiveBytes);
if (message == null)
{
if (!_badPacketBans.ContainsKey(senderEndpoint.Address)) _badPacketBans.Add(senderEndpoint.Address, true);
Log.ErrorFormat("Receive bad packet with ID: {0} (0x{0:x2}) {2} from {1}", msgId, senderEndpoint.Address, (DefaultMessageIdTypes) msgId);
return;
}
message.Source = "RakNet";
TraceReceive(message);
switch (msgIdType)
{
case DefaultMessageIdTypes.ID_UNCONNECTED_PING:
case DefaultMessageIdTypes.ID_UNCONNECTED_PING_OPEN_CONNECTIONS:
{
UnconnectedPing incoming = (UnconnectedPing) message;
//TODO: This needs to be verified with RakNet first
//response.sendpingtime = msg.sendpingtime;
//response.sendpongtime = DateTimeOffset.UtcNow.Ticks / TimeSpan.TicksPerMillisecond;
var packet = UnconnectedPong.CreateObject();
packet.serverId = 22345;
packet.pingId = incoming.pingId;
packet.serverName = MotdProvider.GetMotd(ServerInfo);
var data = packet.Encode();
packet.PutPool();
TraceSend(packet);
SendData(data, senderEndpoint, new object());
break;
}
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_1:
{
OpenConnectionRequest1 incoming = (OpenConnectionRequest1) message;
Log.DebugFormat("New connection from: {0} {1}", senderEndpoint.Address, senderEndpoint.Port);
lock (_playerSessions)
{
// Already connecting, then this is just a duplicate
if (_connectionAttemps.ContainsKey(senderEndpoint))
{
DateTime created;
_connectionAttemps.TryGetValue(senderEndpoint, out created);
if (DateTime.UtcNow < created + TimeSpan.FromSeconds(3))
{
return;
}
}
//PlayerNetworkSession session;
//if (_playerSessions.TryGetValue(senderEndpoint, out session))
//{
// Log.DebugFormat("Reconnection detected from {0}. Removing old session and disconnecting old player.", senderEndpoint.Address);
// Player oldPlayer = session.Player;
// if (oldPlayer != null)
// {
// oldPlayer.Disconnect("Reconnecting.");
// }
// else
// {
// _playerSessions.TryRemove(session.EndPoint, out session);
// }
//}
if (!_connectionAttemps.ContainsKey(senderEndpoint)) _connectionAttemps.Add(senderEndpoint, DateTime.UtcNow);
}
var packet = OpenConnectionReply1.CreateObject();
packet.serverGuid = 12345;
packet.mtuSize = incoming.mtuSize;
packet.serverHasSecurity = 0;
var data = packet.Encode();
packet.PutPool();
TraceSend(packet);
SendData(data, senderEndpoint, new object());
break;
}
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_2:
{
OpenConnectionRequest2 incoming = (OpenConnectionRequest2) message;
PlayerNetworkSession session;
lock (_playerSessions)
{
if (_connectionAttemps.ContainsKey(senderEndpoint))
{
_connectionAttemps.Remove(senderEndpoint);
}
else
{
Log.ErrorFormat("Unexpected connection request packet from {0}.", senderEndpoint.Address);
return;
}
//PlayerNetworkSession session;
if (_playerSessions.TryGetValue(senderEndpoint, out session))
{
Log.WarnFormat("Reconnection detected from {0}. Removing old session and disconnecting old player.", senderEndpoint.Address);
Player oldPlayer = session.Player;
if (oldPlayer != null)
{
oldPlayer.Disconnect("Reconnecting.");
}
else
{
_playerSessions.TryRemove(session.EndPoint, out session);
}
}
if (_playerSessions.TryGetValue(senderEndpoint, out session))
{
// Already connecting, then this is just a duplicate
if (session.State == ConnectionState.Connecting /* && DateTime.UtcNow < session.LastUpdatedTime + TimeSpan.FromSeconds(2)*/)
{
return;
}
Log.ErrorFormat("Unexpected session from {0}. Removing old session and disconnecting old player.", senderEndpoint.Address);
Player oldPlayer = session.Player;
if (oldPlayer != null)
{
oldPlayer.Disconnect("Reconnecting.");
}
else
{
_playerSessions.TryRemove(session.EndPoint, out session);
}
}
session = new PlayerNetworkSession(null, senderEndpoint)
{
State = ConnectionState.Connecting,
LastUpdatedTime = DateTime.UtcNow,
Mtuize = incoming.mtuSize
};
_playerSessions.TryAdd(senderEndpoint, session);
}
Player player = PlayerFactory.CreatePlayer(this, senderEndpoint, incoming.mtuSize);
player.ClientGuid = incoming.clientGuid;
player.NetworkSession = session;
session.Player = player;
var reply = OpenConnectionReply2.CreateObject();
reply.serverGuid = 12345;
reply.mtuSize = incoming.mtuSize;
reply.doSecurityAndHandshake = new byte[0];
var data = reply.Encode();
reply.PutPool();
TraceSend(reply);
SendData(data, senderEndpoint, session.SyncRoot);
break;
}
default:
if (!_badPacketBans.ContainsKey(senderEndpoint.Address)) _badPacketBans.Add(senderEndpoint.Address, true);
Log.ErrorFormat("Receive unexpected packet with ID: {0} (0x{0:x2}) {2} from {1}", msgId, senderEndpoint.Address, (DefaultMessageIdTypes) msgId);
break;
}
message.PutPool();
}
private void HandleAck(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null) return;
Player player = session.Player;
if (player == null) return;
Ack ack = Ack.CreateObject();
ack.Decode(receiveBytes);
int ackSeqNo = ack.sequenceNumber.IntValue();
int toAckSeqNo = ack.toSequenceNumber.IntValue();
if (ack.onlyOneSequence == 1) toAckSeqNo = ackSeqNo;
if (ack.onlyOneSequence != 1 && ack.count > 2)
{
if (Log.IsDebugEnabled)
Log.DebugFormat("ACK from Player {0} ({5}) #{1}-{2} IsOnlyOne {3} Count={4}", player.Username, ackSeqNo, toAckSeqNo, ack.onlyOneSequence, ack.count, player.Rtt);
}
ack.PutPool();
var queue = session.WaitingForAcksQueue;
for (int i = ackSeqNo; i <= toAckSeqNo; i++)
{
Datagram datagram;
if (queue.TryRemove(i, out datagram))
{
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = player.Rtt;
long RTTVar = player.RttVar;
player.Rtt = (long) (RTT*0.875 + rtt*0.125);
player.RttVar = (long) (RTTVar*0.875 + Math.Abs(RTT - rtt)*0.125);
player.Rto = player.Rtt + 4*player.RttVar + 100; // SYNC time in the end
foreach (MessagePart part in datagram.MessageParts)
{
part.PutPool();
}
datagram.PutPool();
}
else
{
if (Log.IsDebugEnabled)
Log.DebugFormat("Failed to remove ACK #{0} for {2}. Queue size={1}", i, queue.Count, player.Username);
}
}
}
private void EnqueueAck(PlayerNetworkSession session, int sequenceNumber)
{
session.PlayerAckQueue.Enqueue(sequenceNumber);
}
internal void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
if (message == null)
{
return;
}
TraceReceive(message);
if (typeof(UnknownPackage) == message.GetType())
{
UnknownPackage packet = (UnknownPackage)message;
Log.Warn($"Received unknown package 0x{message.Id:X2}\n{Package.HexDump(packet.Message)}");
return;
}
if (typeof(McpeBatch) == message.GetType())
{
McpeBatch batch = (McpeBatch)message;
var messages = new List <Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = MiNetServer.MemoryStreamManager.GetStream();
defStream2.CopyTo(destination);
destination.Position = 0;
NbtBinaryReader reader = new NbtBinaryReader(destination, true);
int len = reader.ReadInt32();
byte[] internalBuffer = reader.ReadBytes(len);
//byte[] internalBuffer = destination.ToArray();
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer) ?? new UnknownPackage(internalBuffer[0], internalBuffer));
if (destination.Length > destination.Position)
{
throw new Exception("Have more data");
}
}
foreach (var msg in messages)
{
msg.DatagramSequenceNumber = batch.DatagramSequenceNumber;
msg.OrderingChannel = batch.OrderingChannel;
msg.OrderingIndex = batch.OrderingIndex;
HandlePackage(msg, playerSession);
msg.PutPool();
}
return;
}
Player player = playerSession.Player;
if (player != null)
{
player.HandlePackage(message);
}
}
private void SendDatagram(PlayerNetworkSession session, Datagram datagram)
{
SendDatagram(session, datagram, true);
}
/// <summary>
/// Handles the specified package.
/// </summary>
/// <param name="message">The package.</param>
/// <param name="senderEndpoint">The sender's endpoint.</param>
private void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
TraceReceive(message);
if (typeof (UnknownPackage) == message.GetType())
{
return;
}
if (typeof (McpeBatch) == message.GetType())
{
McpeBatch batch = (McpeBatch) message;
var messages = new List<Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = new MemoryStream();
defStream2.CopyTo(destination);
byte[] internalBuffer = destination.ToArray();
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer) ?? new UnknownPackage(internalBuffer[0], internalBuffer));
}
foreach (var msg in messages)
{
HandlePackage(msg, playerSession);
}
}
playerSession.Player.HandlePackage(message);
playerSession.LastUpdatedTime = DateTime.UtcNow;
if (typeof (DisconnectionNotification) == message.GetType())
{
PlayerNetworkSession value;
_playerSessions.TryRemove(playerSession.EndPoint, out value);
}
}
private void HandleNak(PlayerNetworkSession session, byte[] receiveBytes)
{
if (session == null)
{
return;
}
Nak nak = Nak.CreateObject();
nak.Reset();
nak.Decode(receiveBytes);
var queue = session.WaitingForAcksQueue;
foreach (Tuple <int, int> range in nak.ranges)
{
Interlocked.Increment(ref ServerInfo.NumberOfNakReceive);
int start = range.Item1;
int end = range.Item2;
for (int i = start; i <= end; i++)
{
session.ErrorCount++;
// HACK: Just to make sure we aren't getting unessecary load on the queue during heavy buffering.
//if (ServerInfo.AvailableBytes > 1000) continue;
Datagram datagram;
//if (queue.TryRemove(i, out datagram))
if (!session.Evicted && queue.TryRemove(i, out datagram))
{
// RTT = RTT * 0.875 + rtt * 0.125
// RTTVar = RTTVar * 0.875 + abs(RTT - rtt)) * 0.125
// RTO = RTT + 4 * RTTVar
long rtt = datagram.Timer.ElapsedMilliseconds;
long RTT = session.Rtt;
long RTTVar = session.RttVar;
session.Rtt = (long)(RTT * 0.875 + rtt * 0.125);
session.RttVar = (long)(RTTVar * 0.875 + Math.Abs(RTT - rtt) * 0.125);
session.Rto = session.Rtt + 4 * session.RttVar + 100; // SYNC time in the end
FastThreadPool.QueueUserWorkItem(delegate
{
var dgram = (Datagram)datagram;
if (Log.IsDebugEnabled)
{
Log.WarnFormat("NAK, resent datagram #{0} for {1}", dgram.Header.datagramSequenceNumber, session.Username);
}
SendDatagram(session, dgram);
Interlocked.Increment(ref ServerInfo.NumberOfResends);
});
}
else
{
if (Log.IsDebugEnabled)
{
Log.WarnFormat("NAK, no datagram #{0} for {1}", i, session.Username);
}
}
}
}
nak.PutPool();
}
/// <summary>
/// Processes a message.
/// </summary>
/// <param name="receiveBytes">The received bytes.</param>
/// <param name="senderEndpoint">The sender's endpoint.</param>
/// <exception cref="System.Exception">Receive ERROR, NAK in wrong place</exception>
private void ProcessMessage(byte[] receiveBytes, IPEndPoint senderEndpoint)
{
byte msgId = receiveBytes[0];
if (msgId == 0xFE)
{
Log.WarnFormat("A query detected from: {0}", senderEndpoint.Address);
HandleQuery(receiveBytes, senderEndpoint);
}
else if (msgId <= (byte) DefaultMessageIdTypes.ID_USER_PACKET_ENUM)
{
DefaultMessageIdTypes msgIdType = (DefaultMessageIdTypes) msgId;
Package message = PackageFactory.CreatePackage(msgId, receiveBytes);
TraceReceive(message);
switch (msgIdType)
{
case DefaultMessageIdTypes.ID_UNCONNECTED_PING:
case DefaultMessageIdTypes.ID_UNCONNECTED_PING_OPEN_CONNECTIONS:
{
UnconnectedPing incoming = (UnconnectedPing) message;
//TODO: This needs to be verified with RakNet first
//response.sendpingtime = msg.sendpingtime;
//response.sendpongtime = DateTimeOffset.UtcNow.Ticks / TimeSpan.TicksPerMillisecond;
var packet = new UnconnectedPong
{
serverId = 22345,
pingId = incoming.pingId /*incoming.pingId*/,
serverName = string.Format(@"MCPE;{0};27;0.11.1;{1};{2}", Motd, _playerSessions.Count, 1000)
};
var data = packet.Encode();
TraceSend(packet);
SendData(data, senderEndpoint, new object());
break;
}
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_1:
{
OpenConnectionRequest1 incoming = (OpenConnectionRequest1) message;
_isPerformanceTest = _isPerformanceTest || incoming.raknetProtocolVersion == byte.MaxValue;
var packet = new OpenConnectionReply1
{
serverGuid = 12345,
mtuSize = incoming.mtuSize,
serverHasSecurity = 0
};
var data = packet.Encode();
TraceSend(packet);
SendData(data, senderEndpoint, new object());
break;
}
case DefaultMessageIdTypes.ID_OPEN_CONNECTION_REQUEST_2:
{
OpenConnectionRequest2 incoming = (OpenConnectionRequest2) message;
Log.WarnFormat("New connection from: {0} {1}", senderEndpoint.Address, incoming.clientUdpPort);
var packet = new OpenConnectionReply2
{
serverGuid = 12345,
mtuSize = incoming.mtuSize,
doSecurityAndHandshake = new byte[0]
};
PlayerNetworkSession session = null;
lock (_playerSessions)
{
if (_playerSessions.ContainsKey(senderEndpoint))
{
PlayerNetworkSession value;
_playerSessions.TryRemove(senderEndpoint, out value);
value.Player.HandleDisconnectionNotification();
Log.Info("Removed ghost");
}
Player player = PlayerFactory.CreatePlayer(this, senderEndpoint, _levels[_random.Next(0, _levels.Count)], incoming.mtuSize);
session = new PlayerNetworkSession(player, senderEndpoint);
session.LastUpdatedTime = DateTime.UtcNow;
session.Mtuize = incoming.mtuSize;
_playerSessions.TryAdd(senderEndpoint, session);
}
var data = packet.Encode();
TraceSend(packet);
SendData(data, senderEndpoint, session.SyncRoot);
break;
}
default:
Log.ErrorFormat("Receive unexpected packet with ID: {0} (0x{0:x2}) from {1}", msgId, senderEndpoint.Address);
break;
}
if (message != null)
{
message.PutPool();
}
else
{
Log.ErrorFormat("Receive unexpected packet with ID: {0} (0x{0:x2}) from {1}", msgId, senderEndpoint.Address);
}
}
else
{
DatagramHeader header = new DatagramHeader(receiveBytes[0]);
if (!header.isACK && !header.isNAK && header.isValid)
{
if (receiveBytes[0] == 0xa0)
{
throw new Exception("Receive ERROR, NAK in wrong place");
}
ConnectedPackage package = ConnectedPackage.CreateObject();
package.Decode(receiveBytes);
List<Package> messages = package.Messages;
if (messages.Count == 1)
{
McpeBatch batch = messages.First() as McpeBatch;
if (batch != null)
{
messages = new List<Package>();
// Get bytes
byte[] payload = batch.payload;
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
MemoryStream destination = new MemoryStream();
defStream2.CopyTo(destination);
byte[] internalBuffer = destination.ToArray();
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer) ?? new UnknownPackage(internalBuffer[0], internalBuffer));
}
}
}
// IF reliable code below is enabled, useItem start sending doubles
// for some unknown reason.
//Reliability reliability = package._reliability;
//if (reliability == Reliability.Reliable
// || reliability == Reliability.ReliableSequenced
// || reliability == Reliability.ReliableOrdered
// )
{
EnqueueAck(senderEndpoint, package._datagramSequenceNumber);
}
PlayerNetworkSession playerSession;
if (_playerSessions.TryGetValue(senderEndpoint, out playerSession))
{
foreach (var message in messages)
{
if (message is SplitPartPackage)
{
SplitPartPackage splitMessage = message as SplitPartPackage;
int spId = package._splitPacketId;
int spIdx = package._splitPacketIndex;
int spCount = package._splitPacketCount;
if (!playerSession.Splits.ContainsKey(spId))
{
playerSession.Splits.Add(spId, new SplitPartPackage[spCount]);
}
SplitPartPackage[] spPackets = playerSession.Splits[spId];
spPackets[spIdx] = splitMessage;
bool haveEmpty = false;
for (int i = 0; i < spPackets.Length; i++)
{
haveEmpty = haveEmpty || spPackets[i] == null;
}
if (!haveEmpty)
{
Log.DebugFormat("Got all {0} split packages for split ID: {1}", spCount, spId);
MemoryStream stream = new MemoryStream();
for (int i = 0; i < spPackets.Length; i++)
{
byte[] buf = spPackets[i].Message;
stream.Write(buf, 0, buf.Length);
}
byte[] buffer = stream.ToArray();
var fullMessage = PackageFactory.CreatePackage(buffer[0], buffer) ?? new UnknownPackage(buffer[0], buffer);
HandlePackage(fullMessage, playerSession);
}
continue;
}
message.Timer.Restart();
HandlePackage(message, playerSession);
message.PutPool();
}
}
package.PutPool();
}
else if (header.isACK && header.isValid)
{
HandleAck(receiveBytes, senderEndpoint);
}
else if (header.isNAK && header.isValid)
{
HandleNak(receiveBytes, senderEndpoint);
}
else if (!header.isValid)
{
Log.Warn("!!!! ERROR, Invalid header !!!!!");
}
}
}
internal void HandlePackage(Package message, PlayerNetworkSession playerSession)
{
//SignalTick();
try
{
if (message == null)
{
return;
}
if (typeof(UnknownPackage) == message.GetType())
{
UnknownPackage packet = (UnknownPackage)message;
if (Log.IsDebugEnabled)
{
Log.Warn($"Received unknown package 0x{message.Id:X2}\n{Package.HexDump(packet.Message)}");
}
message.PutPool();
return;
}
if (typeof(McpeWrapper) == message.GetType())
{
McpeWrapper batch = (McpeWrapper)message;
var messages = new List <Package>();
// Get bytes
byte[] payload = batch.payload;
if (playerSession.CryptoContext != null && playerSession.CryptoContext.UseEncryption)
{
throw new Exception("No crypto enabled");
}
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var defStream2 = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual package out of bytes
using (MemoryStream destination = MiNetServer.MemoryStreamManager.GetStream())
{
defStream2.CopyTo(destination);
destination.Position = 0;
NbtBinaryReader reader = new NbtBinaryReader(destination, true);
while (destination.Position < destination.Length)
{
//int len = reader.ReadInt32();
int len = BatchUtils.ReadLength(destination);
byte[] internalBuffer = reader.ReadBytes(len);
//if (Log.IsDebugEnabled)
// Log.Debug($"0x{internalBuffer[0]:x2}\n{Package.HexDump(internalBuffer)}");
messages.Add(PackageFactory.CreatePackage(internalBuffer[0], internalBuffer, "mcpe") ??
new UnknownPackage(internalBuffer[0], internalBuffer));
}
if (destination.Length > destination.Position)
{
throw new Exception("Have more data");
}
}
}
foreach (var msg in messages)
{
// Temp fix for performance, take 1.
var interact = msg as McpeInteract;
if (interact?.actionId == 4 && interact.targetRuntimeEntityId == 0)
{
continue;
}
msg.DatagramSequenceNumber = batch.DatagramSequenceNumber;
msg.Reliability = batch.Reliability;
msg.ReliableMessageNumber = batch.ReliableMessageNumber;
msg.OrderingChannel = batch.OrderingChannel;
msg.OrderingIndex = batch.OrderingIndex;
HandlePackage(msg, playerSession);
}
message.PutPool();
return;
}
MiNetServer.TraceReceive(message);
if (CryptoContext != null && CryptoContext.UseEncryption)
{
MiNetServer.FastThreadPool.QueueUserWorkItem(delegate()
{
HandlePackage(MessageHandler, message as Package);
message.PutPool();
});
}
else
{
HandlePackage(MessageHandler, message);
message.PutPool();
}
}
catch (Exception e)
{
Log.Error("Package handling", e);
throw;
}
}
internal void HandlePacket(Packet message, PlayerNetworkSession playerSession)
{
//SignalTick();
try
{
if (message == null)
{
return;
}
if (typeof(UnknownPacket) == message.GetType())
{
UnknownPacket packet = (UnknownPacket)message;
if (Log.IsDebugEnabled)
{
Log.Warn($"Received unknown packet 0x{message.Id:X2}\n{Packet.HexDump(packet.Message)}");
}
message.PutPool();
return;
}
if (typeof(McpeWrapper) == message.GetType())
{
McpeWrapper batch = (McpeWrapper)message;
var messages = new List <Packet>();
// Get bytes
byte[] payload = batch.payload;
if (playerSession.CryptoContext != null && playerSession.CryptoContext.UseEncryption)
{
payload = CryptoUtils.Decrypt(payload, playerSession.CryptoContext);
}
// Decompress bytes
MemoryStream stream = new MemoryStream(payload);
if (stream.ReadByte() != 0x78)
{
if (Log.IsDebugEnabled)
{
Log.Error($"Incorrect ZLib header. Expected 0x78 0x9C 0x{message.Id:X2}\n{Packet.HexDump(batch.payload)}");
}
if (Log.IsDebugEnabled)
{
Log.Error($"Incorrect ZLib header. Decrypted 0x{message.Id:X2}\n{Packet.HexDump(payload)}");
}
throw new InvalidDataException("Incorrect ZLib header. Expected 0x78 0x9C");
}
stream.ReadByte();
using (var deflateStream = new DeflateStream(stream, CompressionMode.Decompress, false))
{
// Get actual packet out of bytes
using (MemoryStream destination = MiNetServer.MemoryStreamManager.GetStream())
{
deflateStream.CopyTo(destination);
destination.Position = 0;
while (destination.Position < destination.Length)
{
int len = (int)VarInt.ReadUInt32(destination);
long pos = destination.Position;
int id = (int)VarInt.ReadUInt32(destination);
len = (int)(len - (destination.Position - pos)); // calculate len of buffer after varint
byte[] internalBuffer = new byte[len];
destination.Read(internalBuffer, 0, len);
//if (Log.IsDebugEnabled)
// Log.Debug($"0x{internalBuffer[0]:x2}\n{Packet.HexDump(internalBuffer)}");
try
{
messages.Add(PacketFactory.Create((byte)id, internalBuffer, "mcpe") ??
new UnknownPacket((byte)id, internalBuffer));
}
catch (Exception e)
{
if (Log.IsDebugEnabled)
{
Log.Warn($"Error parsing packet 0x{message.Id:X2}\n{Packet.HexDump(internalBuffer)}");
}
throw;
}
}
if (destination.Length > destination.Position)
{
throw new Exception("Have more data");
}
}
}
foreach (var msg in messages)
{
// Temp fix for performance, take 1.
var interact = msg as McpeInteract;
if (interact?.actionId == 4 && interact.targetRuntimeEntityId == 0)
{
continue;
}
msg.DatagramSequenceNumber = batch.DatagramSequenceNumber;
msg.Reliability = batch.Reliability;
msg.ReliableMessageNumber = batch.ReliableMessageNumber;
msg.OrderingChannel = batch.OrderingChannel;
msg.OrderingIndex = batch.OrderingIndex;
HandlePacket(msg, playerSession);
}
message.PutPool();
return;
}
MiNetServer.TraceReceive(message);
if (CryptoContext != null && CryptoContext.UseEncryption)
{
MiNetServer.FastThreadPool.QueueUserWorkItem(() =>
{
HandlePacket(MessageHandler, message as Packet);
message.PutPool();
});
}
else
{
HandlePacket(MessageHandler, message);
message.PutPool();
}
}
catch (Exception e)
{
Log.Error("Packet handling", e);
throw;
}
}
public LoginMessageHandler(PlayerNetworkSession session)
{
_session = session;
}
public LoginMessageHandler(PlayerNetworkSession session)
{
_session = session;
}
