public void Dispose()
{
_socket?.Dispose();
#if NETSTANDARD1_3 || NETSTANDARD2_0 || NET461 || NET472
_tlsCertificate?.Dispose();
#endif
}
public void Dispose()
{
_socket?.Dispose();
#if !NET452
_tlsCertificate?.Dispose();
#endif
}
async Task TryHandleClientConnectionAsync(CrossPlatformSocket clientSocket)
{
Stream stream = null;
string remoteEndPoint = null;
try
{
remoteEndPoint = clientSocket.RemoteEndPoint.ToString();
_logger.Verbose("Client '{0}' accepted by TCP listener '{1}, {2}'.",
remoteEndPoint,
_localEndPoint,
_addressFamily == AddressFamily.InterNetwork ? "ipv4" : "ipv6");
clientSocket.NoDelay = _options.NoDelay;
stream = clientSocket.GetStream();
X509Certificate2 clientCertificate = null;
if (_tlsCertificate != null)
{
var sslStream = new SslStream(stream, false, _tlsOptions.RemoteCertificateValidationCallback);
await sslStream.AuthenticateAsServerAsync(
_tlsCertificate,
_tlsOptions.ClientCertificateRequired,
_tlsOptions.SslProtocol,
_tlsOptions.CheckCertificateRevocation).ConfigureAwait(false);
stream = sslStream;
clientCertificate = sslStream.RemoteCertificate as X509Certificate2;
if (clientCertificate == null && sslStream.RemoteCertificate != null)
{
clientCertificate = new X509Certificate2(sslStream.RemoteCertificate.Export(X509ContentType.Cert));
}
}
var clientHandler = ClientHandler;
if (clientHandler != null)
{
using (var clientAdapter = new MqttChannelAdapter(
new MqttTcpChannel(stream, remoteEndPoint, clientCertificate),
new MqttPacketFormatterAdapter(new MqttPacketWriter()),
null,
_rootLogger))
{
await clientHandler(clientAdapter).ConfigureAwait(false);
}
}
}
catch (Exception exception)
{
if (exception is ObjectDisposedException)
{
// It can happen that the listener socket is accessed after the cancellation token is already set and the listener socket is disposed.
return;
}
if (exception is SocketException socketException &&
socketException.SocketErrorCode == SocketError.OperationAborted)
{
return;
}
_logger.Error(exception, "Error while handling client connection.");
}
finally
{
try
{
stream?.Dispose();
clientSocket?.Dispose();
}
catch (Exception disposeException)
{
_logger.Error(disposeException, "Error while cleaning up client connection");
}
}
_logger.Verbose("Client '{0}' disconnected at TCP listener '{1}, {2}'.",
remoteEndPoint,
_localEndPoint,
_addressFamily == AddressFamily.InterNetwork ? "ipv4" : "ipv6");
}
async Task TryHandleClientConnectionAsync(CrossPlatformSocket clientSocket)
{
Stream stream = null;
string remoteEndPoint = null;
try
{
remoteEndPoint = clientSocket.RemoteEndPoint.ToString();
_logger.Verbose("Client '{0}' accepted by TCP listener '{1}, {2}'.",
remoteEndPoint,
_localEndPoint,
_addressFamily == AddressFamily.InterNetwork ? "ipv4" : "ipv6");
clientSocket.NoDelay = _options.NoDelay;
stream = clientSocket.GetStream();
X509Certificate2 clientCertificate = null;
if (_tlsCertificate != null)
{
var sslStream = new SslStream(stream, false, _tlsOptions.RemoteCertificateValidationCallback);
#if NETCOREAPP3_1 || NET5_0_OR_GREATER
await sslStream.AuthenticateAsServerAsync(
new SslServerAuthenticationOptions()
{
ServerCertificate = _tlsCertificate,
ClientCertificateRequired = _tlsOptions.ClientCertificateRequired,
EnabledSslProtocols = _tlsOptions.SslProtocol,
CertificateRevocationCheckMode = _tlsOptions.CheckCertificateRevocation ? X509RevocationMode.Online : X509RevocationMode.NoCheck,
EncryptionPolicy = EncryptionPolicy.RequireEncryption,
CipherSuitesPolicy = _tlsOptions.CipherSuitesPolicy
}).ConfigureAwait(false);
#else
await sslStream.AuthenticateAsServerAsync(
_tlsCertificate,
_tlsOptions.ClientCertificateRequired,
_tlsOptions.SslProtocol,
_tlsOptions.CheckCertificateRevocation).ConfigureAwait(false);
#endif
stream = sslStream;
clientCertificate = sslStream.RemoteCertificate as X509Certificate2;
if (clientCertificate == null && sslStream.RemoteCertificate != null)
{
clientCertificate = new X509Certificate2(sslStream.RemoteCertificate.Export(X509ContentType.Cert));
}
}
var clientHandler = ClientHandler;
if (clientHandler != null)
{
var tcpChannel = new MqttTcpChannel(stream, remoteEndPoint, clientCertificate);
var bufferWriter = new MqttBufferWriter(_serverOptions.WriterBufferSize, _serverOptions.WriterBufferSizeMax);
var packetFormatterAdapter = new MqttPacketFormatterAdapter(bufferWriter);
using (var clientAdapter = new MqttChannelAdapter(tcpChannel, packetFormatterAdapter, null, _rootLogger))
{
await clientHandler(clientAdapter).ConfigureAwait(false);
}
}
}
catch (Exception exception)
{
if (exception is ObjectDisposedException)
{
// It can happen that the listener socket is accessed after the cancellation token is already set and the listener socket is disposed.
return;
}
if (exception is SocketException socketException &&
socketException.SocketErrorCode == SocketError.OperationAborted)
{
return;
}
_logger.Error(exception, "Error while handling client connection.");
}
finally
{
try
{
stream?.Dispose();
clientSocket?.Dispose();
}
catch (Exception disposeException)
{
_logger.Error(disposeException, "Error while cleaning up client connection");
}
}
_logger.Verbose("Client '{0}' disconnected at TCP listener '{1}, {2}'.",
remoteEndPoint,
_localEndPoint,
_addressFamily == AddressFamily.InterNetwork ? "ipv4" : "ipv6");
}