//------------------------------------------------------------------------------------------------------------------------
public void Stop(bool CloseAllChannels = false)
{
try
{
lock (this)
{
//close all channels
if (CloseAllChannels)
{
_Channels.ForEach(c => { try { c.Close("Server stopped"); } catch (Exception ex) { DebugEx.Assert(ex, "Error while closing channel"); } });
_Channels.Clear();
}
//update flag
if (!_IsRunning)
{
return;
}
else
{
_IsRunning = false;
}
//close my socket
try
{
if (sock != null)
{
#if NETFX
try { sock.Close(); } catch { }
#endif
try { sock.Dispose(); } catch { }
}
}
catch (Exception ex)
{
DebugEx.TraceErrorException(ex);
}
sock = null;
//wait for task finish
#if NETFX
PortListener?.Join(1000);
#elif UNIVERSAL
PortListener?.Wait(1000);
#endif
PortListener = null;
}
}
catch (Exception ex)
{
DebugEx.Assert(ex, "YPChannel Server Stop() failed");
}
}
//------------------------------------------------------------------------------------------------------------------------
void HandleNewConnection(Socket newsocket)
{
try
{
#region check reconnection throttle
try
{
//setup socket
newsocket.ReceiveTimeout = -1;
newsocket.SendTimeout = 60 * 1000;
#if NETFX
var re = newsocket.RemoteEndPoint.GetIPAddress().ToStringInvariant();
#elif UNIVERSAL
var re = newsocket.Information.RemoteAddress.ToStringInvariant();
#endif
//filtering
if (OnNewSocketConnectionFilter != null && OnNewSocketConnectionFilter(this, re) == false)
{
#if NETFX
try { newsocket.Close(); } catch { }
#endif
try { newsocket.Dispose(); } catch { }
DebugEx.TraceWarning("Connection from " + re + " closed from filter");
return;
}
if (IsReconnectionThrottleEnabled && re != "127.0.0.1" && re != "localhost") //no reconnection throttle for localhost connections
{
var rbe = reconnectThrottleBookKeeper.TryGetOrDefault(re);
if (rbe == null)
{
rbe = new ReconnectionBookkeepEntry()
{
ConnectionTimestamp = DateTime.Now + TimeSpan.FromMilliseconds(100),
Connections = 1,
};
reconnectThrottleBookKeeper.ForceAdd(re, rbe);
}
else
{
if (++rbe.Connections > ReconnectionThrottleAfterConnectionCount)
{
var elapsed = DateTime.Now - rbe.ConnectionTimestamp;
if (elapsed < ReconnectionThrottleTimeout)
{
#if NETFX
try { newsocket.Close(); } catch { }
#endif
try { newsocket.Dispose(); } catch { }
DebugEx.TraceWarning("Connection from " + re + " closed due to reconnection throttle (" + elapsed.Seconds + " sec)");
return;
}
}
}
}
}
catch (Exception ex) { DebugEx.TraceWarning(ex, "YPServer Reconnection throttle exception"); }
//cleanup old entries
reconnectThrottleBookKeeper.RemoveWhere(e => DateTime.Now - e.Value.ConnectionTimestamp > ReconnectionThrottleTimeout);
#endregion
//start task new connection
Task.Run(() =>
{
ServerChannel channel = null;
string channelKey = null;
Thread.Sleep(MathTools.GetRandomNumber(1, 100));
try
{
//check
#if NETFX
if (!newsocket.Connected)
{
DebugEx.TraceWarning("YPServer newsocket not connected?");
try { newsocket.Close(); } catch { }
return;
}
#endif
//create channel
var con = ChannelConstructor;
channel = con == null ? new ServerChannel(this, Protocols, SupportedChannelSerializationModes, PreferredChannelSerializationModes, newsocket) : con(Protocols, newsocket);
if (channel == null)
{
DebugEx.Assert("Could not create channel");
#if NETFX
try { newsocket.Close(); } catch { }
#endif
try { newsocket.Dispose(); } catch { }
return;
}
//add to set
lock (_Channels)
{
//generate unique key
while (IssuedKeys.ContainsKey(channelKey = MathTools.GenerateRandomAlphaNumericString(64)))
{
;
}
//set on channel
channel._ChannelKey = channelKey;
//add to lookups
_Channels.Add(channel);
IssuedKeys.Add(channelKey, channel);
}
//start task timeout monitor
bool setupFinished = false;
Task.Run(() =>
{
try
{
//wait
Thread.Sleep(30000);
//check
if (!setupFinished)
{
DebugEx.TraceLog($"ServerChannel setup timeout ({channel})");
try { channel.Close("ServerChannel setup timeout"); } catch { }
#if NETFX
try { newsocket?.Close(); } catch { }
#endif
try { newsocket?.Dispose(); } catch { }
//remove from lookups
lock (_Channels)
{
if (channel != null)
{
_Channels.Remove(channel);
}
if (channelKey != null)
{
IssuedKeys.Remove(channelKey);
}
}
return;
}
}
catch (Exception ex)
{
DebugEx.Assert(ex, $"Unhandled exception ({channel})");
#if NETFX
try { newsocket?.Close(); } catch { }
#endif
try { newsocket?.Dispose(); } catch { }
//remove from lookups
lock (_Channels)
{
if (channel != null)
{
_Channels.Remove(channel);
}
if (channelKey != null)
{
IssuedKeys.Remove(channelKey);
}
}
return;
}
});
//set serializer
channel.MsgPack = MsgPackSerializer;
//setup channel socket
if (channel.SetupServerSocket() == false)
{
#if NETFX
try { newsocket?.Close(); } catch { }
#endif
try { newsocket?.Dispose(); } catch { }
//remove from lookups
lock (_Channels)
{
if (channel != null)
{
_Channels.Remove(channel);
}
if (channelKey != null)
{
IssuedKeys.Remove(channelKey);
}
}
return;
}
//mark setup finish
setupFinished = true;
//call event
OnNewChannel?.Invoke(this, channel);
//start heartbeat
channel.Start();
}
catch (Exception ex)
{
DebugEx.Assert(ex, "YPServer: Failed setting up new connection for " + channel);
#if NETFX
try { newsocket.Close(); } catch { }
#endif
try { newsocket.Dispose(); } catch { }
//remove from lookups
lock (_Channels)
{
if (channel != null)
{
_Channels.Remove(channel);
}
if (channelKey != null)
{
IssuedKeys.Remove(channelKey);
}
}
return;
}
});
}
catch (Exception ex)
{
DebugEx.Assert(ex, "YPChannel server setup new connection error");
}
}
//------------------------------------------------------------------------------------------------------------------------
public void Stop(bool CloseAllChannels = false)
{
try
{
lock (this)
{
//close all channels
if (CloseAllChannels)
{
var channelsToClose = _Channels.ToArray();
TaskEx.RunSafe(() =>
{
var po = new ParallelOptions()
{
MaxDegreeOfParallelism = 8
};
Parallel.ForEach(channelsToClose, po, c =>
{
{ try { c.Close("Server stopped"); } catch (Exception ex) { DebugEx.TraceErrorException(ex, "Error while closing channel"); } };
});
});
}
//update flag
if (!_IsRunning)
{
return;
}
else
{
_IsRunning = false;
}
//close my socket
try
{
if (sock != null)
{
#if NETFX
try { sock.Close(); } catch { }
#endif
try { sock.Dispose(); } catch { }
}
}
catch (Exception ex)
{
DebugEx.TraceErrorException(ex);
}
sock = null;
//wait for task finish
#if NETFX
PortListener?.Join(1000);
#elif UNIVERSAL
PortListener?.Wait(1000);
#endif
PortListener = null;
}
}
catch (Exception ex)
{
DebugEx.Assert(ex, "YPChannel Server Stop() failed");
}
}
//------------------------------------------------------------------------------------------------------------------------
protected override void onClose(string Message)
{
try
{
base.onClose(Message);
//close all
try
{
if (streamIn != null)
{
#if NETFX
TaskEx.RunSafe(streamIn.Close, AssertException: false)?.Wait(1000);
#endif
TaskEx.RunSafe(streamIn.Dispose, AssertException: false)?.Wait(1000);
}
}
catch { }
try
{
if (streamOut != null)
{
#if NETFX
TaskEx.RunSafe(streamOut.Close, AssertException: false)?.Wait(1000);
#endif
TaskEx.RunSafe(streamOut.Dispose, AssertException: false)?.Wait(1000);
}
}
catch { }
#if NETFX
try
{
if (netstream != null)
{
TaskEx.RunSafe(netstream.Close, AssertException: false)?.Wait(1000);
TaskEx.RunSafe(netstream.Dispose, AssertException: false)?.Wait(1000);
}
}
catch { }
#endif
try
{
#if NETFX
if (_sock?.Connected == true)
{
TaskEx.RunSafe(() => _sock?.Disconnect(false), AssertException: false)?.Wait(1000);
}
TaskEx.RunSafe(() => _sock?.Close(3), AssertException: false)?.Wait(5000);
#endif
TaskEx.RunSafe(() => _sock?.Dispose(), AssertException: false)?.Wait(1000);
}
catch { }
//null them
streamIn = null;
streamOut = null;
#if NETFX
netstream = null;
#endif
_sock = null;
}
catch (Exception ex) { DebugEx.Assert(ex, "YPC (" + Name + ") Exception while disconnecting"); }
}
