private async Task Read()
{
while (!_tokenSource.IsCancellationRequested)
{
try
{
var client = await _listener.AcceptTcpClientAsync()
.ConfigureAwait(false);
var connection = await MllpHost.Create(
client,
_messageLog,
_middleware,
_parser,
_encoding,
_serverCertificate,
_userCertificateValidationCallback)
.ConfigureAwait(false);
lock (_connections)
{
_connections.Add(connection);
}
}
catch (ObjectDisposedException)
{
// Ignore
}
}
}
public static async Task <MllpHost> Create(
TcpClient tcpClient,
IMessageLog messageLog,
IHl7MessageMiddleware middleware,
PipeParser?parser = null,
Encoding?encoding = null,
X509Certificate?serverCertificate = null,
RemoteCertificateValidationCallback?
userCertificateValidationCallback = null)
{
var host = new MllpHost(
tcpClient,
messageLog,
parser ?? new PipeParser(),
encoding ?? Encoding.ASCII,
middleware);
Stream stream = tcpClient.GetStream();
if (serverCertificate != null)
{
var ssl = new SslStream(
stream,
false,
userCertificateValidationCallback);
await ssl.AuthenticateAsServerAsync(
serverCertificate,
true,
SslProtocols.Tls11 | SslProtocols.Tls12,
false)
.ConfigureAwait(false);
host._stream = ssl;
}
else
{
host._stream = stream;
}
host._readThread = host.ReadStream(host._tokenSource.Token);
return(host);
}
public static async Task <MllpHost> Create(TcpClient tcpClient, IHl7MessageMiddleware middleware, Encoding encoding = null, ServerSecurityDetails securityDetails = null, CancellationToken cancellationToken = default(CancellationToken))
{
Stream stream;
NetworkStream networkStream = tcpClient.GetStream();
if (securityDetails != null)
{
var sslStream = new SslStream(networkStream, true, securityDetails.ClientCertificateValidationCallback, null);
try
{
bool askForClientCertificate = securityDetails.ForceClientAuthentciation;
await sslStream.AuthenticateAsServerAsync(securityDetails.ServerCertificate, askForClientCertificate, securityDetails.SupportedSslProtocols, false);
if (askForClientCertificate && !sslStream.IsMutuallyAuthenticated)
{
throw new AuthenticationException("mutual authentication failed.");
}
}
catch (Exception)
{
sslStream.Dispose();
throw;
}
stream = sslStream;
}
else
{
stream = networkStream;
}
var host = new MllpHost(tcpClient, encoding ?? Encoding.ASCII, middleware, stream, cancellationToken);
host.ReadStream(host._token);
return(host);
}
private async Task HandleClientRequestAsync(TcpClient client)
{
var clientEndpoint = (IPEndPoint)client.Client.RemoteEndPoint;
MllpHost connection;
try
{
connection = await MllpHost.Create(client, _middleware, _connectionDetails.Encoding, _connectionDetails.SecurityDetails, _token);
}
catch (AuthenticationException)
{
// don't bring down server just because a client wasn't table to authenticate.
this.TriggerClientAuthenticationFailedEvent(clientEndpoint);
return;
}
lock (_connections)
{
_connections.Add(connection);
}
this.TriggerClientConnectedEvent(clientEndpoint);
}
