private static async Task QueryJavaServerAsync(string hostname, ushort port, PingServerDelegate pingCallback, ServerStatusDelegate statusCallBack)
{
IPEndPoint endPoint = null;
var sw = Stopwatch.StartNew();
string jsonResponse = null;
try
{
var result = await ResolveHostnameAsync(hostname);
if (!result.Success)
{
statusCallBack?.Invoke(new ServerQueryResponse(false, "multiplayer.status.cannot_resolve", new ServerQueryStatus()
{
Delay = sw.ElapsedMilliseconds,
Success = false,
EndPoint = null,
Address = hostname,
Port = port
}));
return;
}
bool waitingOnPing = true;
using (TcpClient client = new TcpClient())
{
await client.ConnectAsync(result.Result, port);
endPoint = client.Client.RemoteEndPoint as IPEndPoint;
if (client.Connected)
{
//conn = new NetConnection(Direction.ClientBound, client.Client);
//conn.LogExceptions = false;
using (var conn = new NetConnection(Direction.ClientBound, client.Client)
{
LogExceptions = true
})
{
long pingId = Rnd.NextUInt();
EventWaitHandle ar = new EventWaitHandle(false, EventResetMode.AutoReset);
conn.OnPacketReceived += (sender, args) =>
{
if (args.Packet is ResponsePacket responsePacket)
{
jsonResponse = responsePacket.ResponseMsg;
ar.Set();
}
else if (args.Packet is PingPacket pong)
{
if (pong.Payload == pingId)
{
waitingOnPing = false;
pingCallback?.Invoke(new ServerPingResponse(true, sw.ElapsedMilliseconds));
}
else
{
waitingOnPing = false;
pingCallback?.Invoke(new ServerPingResponse(true, sw.ElapsedMilliseconds));
}
}
};
bool connectionClosed = false;
conn.OnConnectionClosed += (sender, args) =>
{
connectionClosed = true;
ar.Set();
};
conn.Initialize();
conn.SendPacket(new HandshakePacket()
{
NextState = ConnectionState.Status,
ServerAddress = hostname,
ServerPort = port,
ProtocolVersion = JavaProtocol.ProtocolVersion
});
conn.ConnectionState = ConnectionState.Status;
conn.SendPacket(new RequestPacket());
if (await WaitHandleHelpers.FromWaitHandle(ar, TimeSpan.FromMilliseconds(10000)) &&
!connectionClosed && jsonResponse != null)
{
long timeElapsed = sw.ElapsedMilliseconds;
// Log.Debug($"Server json: " + jsonResponse);
var query = ServerQuery.FromJson(jsonResponse);
if (pingCallback != null)
{
conn.SendPacket(new PingPacket()
{
Payload = pingId,
});
sw.Restart();
}
var r = new ServerQueryStatus()
{
Delay = timeElapsed,
Success = true,
WaitingOnPing = pingCallback != null && !waitingOnPing,
EndPoint = endPoint,
Address = hostname,
Port = port,
Query = query
};
statusCallBack?.Invoke(new ServerQueryResponse(true, r));
}
else
{
statusCallBack?.Invoke(new ServerQueryResponse(false, "multiplayer.status.cannot_connect",
new ServerQueryStatus()
{
EndPoint = endPoint,
Delay = sw.ElapsedMilliseconds,
Success = false,
/* Motd = motd.MOTD,
* ProtocolVersion = motd.ProtocolVersion,
* MaxNumberOfPlayers = motd.MaxPlayers,
* Version = motd.ClientVersion,
* NumberOfPlayers = motd.Players,*/
Address = hostname,
Port = port,
WaitingOnPing = false
}));
}
}
}
}
}
catch (Exception ex)
{
if (sw.IsRunning)
{
sw.Stop();
}
Log.Error($"Could not get server query result! Exception: {ex.ToString()}");
string msg = ex.Message;
if (ex is SocketException)
{
msg = $"multiplayer.status.cannot_connect";
}
statusCallBack?.Invoke(new ServerQueryResponse(false, msg, new ServerQueryStatus()
{
Delay = sw.ElapsedMilliseconds,
Success = false,
EndPoint = endPoint,
Address = hostname,
Port = port
}));
}
finally
{
//conn?.Stop();
//conn?.Dispose();
//conn?.Dispose();
// client?.Close();
}
}
private static async Task QueryJavaServerAsync(ServerConnectionDetails connectionDetails, PingServerDelegate pingCallback, ServerStatusDelegate statusCallBack)
{
CancellationTokenSource cts = new CancellationTokenSource(10000);
using TcpClient client = new TcpClient();
IPEndPoint endPoint = null;
var sw = Stopwatch.StartNew();
string jsonResponse = null;
try
{
bool waitingOnPing = true;
await client.ConnectAsync(connectionDetails.EndPoint.Address, connectionDetails.EndPoint.Port);
endPoint = client.Client.RemoteEndPoint as IPEndPoint;
if (client.Connected)
{
//conn = new NetConnection(Direction.ClientBound, client.Client);
//conn.LogExceptions = false;
using (var conn = new NetConnection(PacketDirection.ClientBound, client.Client)
{
LogExceptions = true
})
{
long pingId = Rnd.NextUInt();
long pingResult = 0;
EventWaitHandle ar = new EventWaitHandle(false, EventResetMode.AutoReset);
conn.OnPacketReceived += (sender, args) =>
{
if (args.Packet is ResponsePacket responsePacket)
{
jsonResponse = responsePacket.ResponseMsg;
if (pingCallback != null)
{
conn.SendPacket(new PingPacket()
{
Payload = pingId,
});
sw.Restart();
}
ar.Set();
}
else if (args.Packet is PingPacket pong)
{
pingResult = sw.ElapsedMilliseconds;
if (pong.Payload == pingId)
{
waitingOnPing = false;
pingCallback?.Invoke(new ServerPingResponse(true, sw.ElapsedMilliseconds));
}
else
{
waitingOnPing = false;
pingCallback?.Invoke(new ServerPingResponse(true, sw.ElapsedMilliseconds));
}
ar.Set();
}
};
bool connectionClosed = false;
conn.OnConnectionClosed += (sender, args) =>
{
if (!cts.IsCancellationRequested)
{
cts.Cancel();
}
connectionClosed = true;
ar.Set();
};
conn.Initialize();
conn.SendPacket(new HandshakePacket()
{
NextState = ConnectionState.Status,
ServerAddress = connectionDetails.Hostname,
ServerPort = (ushort)connectionDetails.EndPoint.Port,
ProtocolVersion = JavaProtocol.ProtocolVersion
});
conn.ConnectionState = ConnectionState.Status;
conn.SendPacket(new RequestPacket());
if (await WaitHandleHelpers.FromWaitHandle(ar, TimeSpan.FromMilliseconds(10000), cts.Token) &&
!connectionClosed && jsonResponse != null)
{
long timeElapsed = sw.ElapsedMilliseconds;
// Log.Debug($"Server json: " + jsonResponse);
var query = ServerQuery.FromJson(jsonResponse);
if (query.Version.Protocol == JavaProtocol.ProtocolVersion)
{
query.Version.Compatibility = CompatibilityResult.Compatible;
}
else if (query.Version.Protocol < JavaProtocol.ProtocolVersion)
{
query.Version.Compatibility = CompatibilityResult.OutdatedServer;
}
else if (query.Version.Protocol > JavaProtocol.ProtocolVersion)
{
query.Version.Compatibility = CompatibilityResult.OutdatedClient;
}
var r = new ServerQueryStatus()
{
Delay = timeElapsed,
Success = true,
WaitingOnPing = pingCallback != null && waitingOnPing,
EndPoint = endPoint,
Address = connectionDetails.Hostname,
Port = (ushort)connectionDetails.EndPoint.Port,
Query = query
};
statusCallBack?.Invoke(new ServerQueryResponse(true, r));
if (waitingOnPing && pingCallback != null)
{
await WaitHandleHelpers.FromWaitHandle(ar, TimeSpan.FromSeconds(1000));
}
}
else
{
statusCallBack?.Invoke(new ServerQueryResponse(false, "multiplayer.status.cannot_connect",
new ServerQueryStatus()
{
EndPoint = endPoint,
Delay = sw.ElapsedMilliseconds,
Success = false,
/* Motd = motd.MOTD,
* ProtocolVersion = motd.ProtocolVersion,
* MaxNumberOfPlayers = motd.MaxPlayers,
* Version = motd.ClientVersion,
* NumberOfPlayers = motd.Players,*/
Address = connectionDetails.Hostname,
Port = (ushort)connectionDetails.EndPoint.Port,
WaitingOnPing = false
}));
}
}
}
}
catch (Exception ex)
{
cts.Cancel();
if (sw.IsRunning)
{
sw.Stop();
}
// client?.Dispose();
string msg = ex.Message;
if (ex is SocketException)
{
msg = $"multiplayer.status.cannot_connect";
}
else
{
Log.Error(ex, $"Could not get server query result!");
}
statusCallBack?.Invoke(new ServerQueryResponse(false, msg, new ServerQueryStatus()
{
Delay = sw.ElapsedMilliseconds,
Success = false,
EndPoint = endPoint,
Address = connectionDetails.Hostname,
Port = (ushort)connectionDetails.EndPoint.Port
}));
}
finally
{
//conn?.Stop();
//conn?.Dispose();
//conn?.Dispose();
// client?.Close();
}
}