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 = 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 ProcessMessage(byte[] receiveBytes, IPEndPoint senderEndpoint)
{
byte msgId = receiveBytes[0];
if (msgId == 0xFE)
{
Log.InfoFormat("A query detected from: {0}", senderEndpoint.Address);
HandleQuery(receiveBytes, senderEndpoint);
}
else if (msgId <= (byte)DefaultMessageIdTypes.ID_USER_PACKET_ENUM)
{
HandleRakNetMessage(receiveBytes, senderEndpoint, msgId);
}
else
{
PlayerNetworkSession playerSession;
if (!PlayerSessions.TryGetValue(senderEndpoint, out playerSession))
{
//Log.DebugFormat("Receive MCPE message 0x{1:x2} without session {0}", senderEndpoint.Address, msgId);
//if (!_badPacketBans.ContainsKey(senderEndpoint.Address))
//{
// _badPacketBans.Add(senderEndpoint.Address, true);
//}
return;
}
if (playerSession.MessageHandler == null)
{
Log.ErrorFormat("Receive MCPE message 0x{1:x2} without message handler {0}. Session removed.", senderEndpoint.Address, msgId);
PlayerSessions.TryRemove(senderEndpoint, out playerSession);
//if (!_badPacketBans.ContainsKey(senderEndpoint.Address))
//{
// _badPacketBans.Add(senderEndpoint.Address, true);
//}
return;
}
if (playerSession.Evicted)
{
return;
}
playerSession.LastUpdatedTime = DateTime.UtcNow;
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();
try
{
package.Decode(receiveBytes);
}
catch (Exception e)
{
playerSession.Disconnect("Bad package received from client.");
Log.Warn($"Bad packet {receiveBytes[0]}\n{Package.HexDump(receiveBytes)}", e);
GreylistManager.Blacklist(senderEndpoint.Address);
return;
}
// 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(playerSession, package._datagramSequenceNumber);
//if (Log.IsDebugEnabled) Log.Debug("ACK on #" + package._datagramSequenceNumber.IntValue());
}
HandleConnectedPackage(playerSession, package);
package.PutPool();
}
else if (header.isACK && header.isValid)
{
HandleAck(playerSession, receiveBytes);
}
else if (header.isNAK && header.isValid)
{
HandleNak(playerSession, receiveBytes);
}
else if (!header.isValid)
{
Log.Warn("!!!! ERROR, Invalid header !!!!!");
}
}
}