private void OnClientConnect(ISocket clientSocket)
{
if (clientSocket == null)
{
return; // socket closed
}
FleckLog.Debug(String.Format("Client connected from {0}:{1}", clientSocket.RemoteIpAddress, clientSocket.RemotePort.ToString()));
ListenForClients();
WebSocketConnection connection = null;
connection = new WebSocketConnection(
clientSocket,
_config,
bytes => RequestParser.Parse(bytes, _scheme),
r => HandlerFactory.BuildHandler(
r,
s => connection.OnMessage(s),
connection.Close,
b => connection.OnBinary(b),
b => connection.OnPing(b),
b => connection.OnPong(b)
),
s => SubProtocolNegotiator.Negotiate(SupportedSubProtocols, s)
);
if (IsSecure)
{
FleckLog.Debug("Authenticating Secure Connection");
clientSocket
.Authenticate(
Certificate,
EnabledSslProtocols,
connection.StartReceiving,
e => FleckLog.Warn("Failed to Authenticate", e)
);
}
else
{
connection.StartReceiving();
}
}
private void HandleReadError(Exception e)
{
if (e is AggregateException)
{
var agg = e as AggregateException;
HandleReadError(agg.InnerException);
return;
}
if (e is ObjectDisposedException)
{
FleckLog.Debug("Swallowing ObjectDisposedException", e);
return;
}
OnError(e);
if (e is HandshakeException)
{
FleckLog.Debug("Error while reading", e);
}
else if (e is WebSocketException)
{
FleckLog.Debug("Error while reading", e);
Close(((WebSocketException)e).StatusCode);
}
else if (e is SubProtocolNegotiationFailureException)
{
FleckLog.Debug(e.Message);
Close(WebSocketStatusCodes.ProtocolError);
}
else if (e is IOException)
{
FleckLog.Debug("Error while reading", e);
Close(WebSocketStatusCodes.AbnormalClosure);
}
else
{
FleckLog.Error("Application Error", e);
Close(WebSocketStatusCodes.InternalServerError);
}
}
private Task SendBytes(byte[] bytes, Action callback = null)
{
return(Socket.Send(bytes, () =>
{
FleckLog.Trace("Sent " + bytes.Length + " bytes");
callback?.Invoke();
},
e =>
{
if (e is IOException)
{
FleckLog.Error("Failed to send. Disconnecting.", e);
}
else
{
FleckLog.Error("Failed to send. Disconnecting.", e);
}
CloseSocket();
}));
}
private void ListenForClients()
{
ListenerSocket.Accept(OnClientConnect, e => {
FleckLog.Error("Listener socket is closed", e);
if (RestartAfterListenError)
{
try
{
ListenerSocket.Dispose();
var socket = new Socket(_locationIP.AddressFamily, SocketType.Stream, ProtocolType.IP);
ListenerSocket = new SocketWrapper(socket);
Start(_config);
}
catch (Exception ex)
{
FleckLog.Error("Listener could not be restarted", ex);
}
}
});
}
private void ListenForClients()
{
ListenerSocket.Accept(OnClientConnect, e =>
{
FleckLog.Error("Listener socket is closed", e);
FleckLog.Info("Listener socket restarting");
try
{
ListenerSocket.Dispose();
var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
ListenerSocket = new SocketWrapper(socket);
Start(_config);
FleckLog.Info("Listener socket restarted");
}
catch (Exception ex)
{
FleckLog.Error("Listener could not be restarted", ex);
}
});
}
private void SendBytes(MemoryBuffer bytes, Action <WebSocketConnection, bool> callback = null)
{
try
{
// TODO: this allocates for the delegate - could probably avoid that with QueuedStream
Socket.Stream.BeginWrite(bytes.Data, 0, bytes.Length, result =>
{
var instance = (WebSocketConnection)result.AsyncState;
var success = false;
try
{
instance.Socket.Stream.EndWrite(result);
FleckLog.Debug($"Sent {bytes.Length} bytes");
success = true;
}
catch (Exception e)
{
instance.HandleWriteError(e);
}
finally
{
bytes.Dispose();
}
try
{
callback?.Invoke(instance, success);
}
catch (Exception e)
{
instance.OnError(e);
}
}, this);
}
catch (Exception e)
{
HandleWriteError(e);
}
}
private Task Send <T>(T message, Func <T, byte[]> createFrame)
{
if (Handler == null)
{
throw new InvalidOperationException("Cannot send before handshake");
}
if (!IsAvailable)
{
const string errorMessage = "Data sent while closing or after close. Ignoring.";
FleckLog.Warn(errorMessage);
var taskForException = new TaskCompletionSource <object>();
taskForException.SetException(new ConnectionNotAvailableException(errorMessage));
return(taskForException.Task);
}
var bytes = createFrame(message);
return(SendBytes(bytes));
}
private void OnClientConnect(ISocket clientSocket)
{
FleckLog.Debug(String.Format("Policy-Client connected from {0}:{1}", clientSocket.RemoteIpAddress, clientSocket.RemotePort.ToString()));
ListenForClients();
var connection = new SocketConnection(clientSocket);
connection.OnMessage = (message) =>
{
if (_regex.IsMatch(message))
{
connection.Send(_policy, "policy", connection.Close);
}
else
{
FleckLog.Info("Policy-Server invalid request: " + message);
connection.Close();
}
};
connection.StartReceiving();
}
private void ListenForClients()
{
ManualResetEvent acceptDone = new ManualResetEvent(false);
bool running = true;
Task client_task = new Task(() =>
{
while (running)
{
acceptDone.Reset();
var task = ListenerSocket.Accept(
s =>
{
running = (s != null);
acceptDone.Set();
OnClientConnect(s);
},
e =>
{
FleckLog.Error("Error while listening for new clients", e);
if (RestartAfterListenError)
{
TryRestart();
}
running = false; acceptDone.Set();
}
);
task.ContinueWith((t) => FleckLog.Warn("Error during client connect", t.Exception),
TaskContinuationOptions.OnlyOnFaulted);
acceptDone.WaitOne();
}
});
client_task.Start();
}
private void SendBytes(byte[] bytes, Action callback = null)
{
Socket.Send(bytes, () =>
{
FleckLog.Debug("Sent " + bytes.Length + " bytes");
if (callback != null)
{
callback();
}
},
e =>
{
if (e is IOException)
{
FleckLog.Debug("Failed to send. Disconnecting.", e);
}
else
{
FleckLog.Info("Failed to send. Disconnecting.", e);
}
CloseSocket();
});
}
public SocketConnection(ISocket socket)
{
Socket = socket;
OnOpen = () => { };
OnClose = () => { };
OnMessage = (x) => { };
OnError = (x) => { };
// default read handler
OnRead = (data, readBytes) =>
{
OnMessage(Encoding.UTF8.GetString(readBytes.ToArray <byte>()));
};
// default read error handler
OnReadError = (e) =>
{
FleckLog.Error("Error while reading", e);
OnError(e);
Close();
};
}
public void Start(Action <IWebSocketConnection> config)
{
var ipLocal = new IPEndPoint(_locationIP, Port);
ListenerSocket.Bind(ipLocal);
ListenerSocket.Listen(1000);
Port = ((IPEndPoint)ListenerSocket.LocalEndPoint).Port;
if (_scheme == "wss")
{
if (Certificate == null)
{
FleckLog.Error("Scheme cannot be 'wss' without a Certificate");
return;
}
if (EnabledSslProtocols == SslProtocols.None)
{
EnabledSslProtocols = SslProtocols.Tls;
FleckLog.Trace("Using default TLS 1.0 security protocol.");
}
}
ListenForClients();
_config = config;
}
private void ListenForClients()
{
ListenerSocket.Accept(OnClientConnect, e => FleckLog.Error("Listener socket is closed", e));
}
private void OnClientConnect(ISocket clientSocket)
{
if (clientSocket == null)
{
return; // socket closed
}
FleckLog.Trace($"Client connected from {clientSocket.RemoteIpAddress}:{clientSocket.RemotePort}");
ListenForClients();
WebSocketConnection connection = null;
connection = new WebSocketConnection(
clientSocket,
_config,
bytes => RequestParser.Parse(bytes, _scheme),
r => HandlerFactory.BuildHandler(r,
s => connection.OnMessage(s),
connection.Close,
b => connection.OnBinary(b),
b => connection.OnPing(b),
b => connection.OnPong(b)),
s => SubProtocolNegotiator.Negotiate(SupportedSubProtocols, s));
if (IsSecure)
{
FleckLog.Debug("Attempting to secure connection...");
clientSocket.Authenticate(Certificate, EnabledSslProtocols, connection.StartReceiving, e => FleckLog.Error($"Cannot secure the connection: {e.Message}", e));
}
else
{
connection.StartReceiving();
}
}
private void OnClientConnect(ISocket clientSocket)
{
if (clientSocket == null)
{
return; // socket closed
}
// experimental removed by wmp
//FleckLog.Debug(String.Format("Client connected from {0}:{1}", clientSocket.RemoteIpAddress, clientSocket.RemotePort.ToString()));
//Console.WriteLine(String.Format("Client connected from {0}:{1}", clientSocket.RemoteIpAddress, clientSocket.RemotePort.ToString()));
string rep = string.Empty;
bool failed = false;
try {
rep = clientSocket.RemoteIpAddress;
Console.WriteLine("Connecting: " + rep);
}
catch {
Console.WriteLine("Started but IP not available.");
failed = true;
}
//ListenForClients();
if (failed)
{
try{ clientSocket.Close(); }catch {}
try{ clientSocket.Stream.Close(); }catch {}
try{ clientSocket.Dispose(); }catch {}
return;
}
WebSocketConnection connection = null;
connection = new WebSocketConnection(
clientSocket,
_config,
bytes => RequestParser.Parse(bytes, _scheme),
r => HandlerFactory.BuildHandler(r,
s => connection.OnMessage(s),
connection.Close,
b => connection.OnBinary(b),
b => connection.OnPing(b),
b => connection.OnPong(b)),
s => SubProtocolNegotiator.Negotiate(SupportedSubProtocols, s));
if (IsSecure)
{
FleckLog.Debug("Authenticating Secure Connection");
clientSocket
.Authenticate(Certificate,
EnabledSslProtocols,
() =>
{
Console.WriteLine("Authenticated {0}", rep);
Server.Firewall.Update(rep, Server.Firewall.UpdateEntry.AuthSuccess);
connection.StartReceiving();
}
, e =>
{
FleckLog.Warn("Failed to Authenticate " + rep, e);
// here we could add connection.Close() ! wmp
Server.Firewall.Update(rep, Server.Firewall.UpdateEntry.AuthFailure);
connection.Close();
});
}
else
{
Server.Firewall.Update(rep, Server.Firewall.UpdateEntry.AuthSuccess);
connection.StartReceiving();
}
}
private void OnClientConnect(ISocket clientSocket)
{
FleckLog.Debug(String.Format("Client connected from {0}:{1}", clientSocket.RemoteIpAddress, clientSocket.RemotePort.ToString()));
ListenForClients();
WebSocketConnection connection = null;
connection = new WebSocketConnection(
clientSocket,
_config,
bytes => RequestParser.Parse(bytes, _scheme),
r => HandlerFactory.BuildHandler(r,
s => connection.OnMessage(s),
connection.Close,
b => connection.OnBinary(b),
b => connection.OnPing(b),
b => connection.OnPong(b)),
s => SubProtocolNegotiator.Negotiate(SupportedSubProtocols, s));
// Determine whether this is a ws or wss connection
try
{
// Wait up to 5 seconds for the first handshake byte
// (Only peek, so it's still in the buffer for the actual handshake handler)
byte[] buffer = new byte[1];
clientSocket.Socket.ReceiveTimeout = 5000;
int BytesRead = clientSocket.Socket.Receive(buffer, 1, SocketFlags.Peek);
clientSocket.Socket.ReceiveTimeout = 0;
if (BytesRead == 1)
{
if ((buffer[0] == 0x16) || (buffer[0] == 0x80))
{
// wss connection, ensure we have a certificate
if (IsSecure)
{
FleckLog.Info("Accepting wss:// Connection");
clientSocket
.Authenticate(Certificate,
connection.StartReceiving,
e =>
{
FleckLog.Warn("Failed to Authenticate", e);
connection.Close();
});
}
else
{
FleckLog.Warn("Rejecting wss:// connection (no certificate)");
connection.Close();
}
}
else
{
// ws connection
FleckLog.Info("Accepting ws:// Connection");
connection.StartReceiving();
}
}
else
{
connection.Close();
}
}
catch (Exception ex)
{
FleckLog.Error("Unable to read handshake byte from client", ex);
connection.Close();
}
}