private async void Listen()
{
_socket.Listen(backlog: 2);
while (!_disposed)
{
Http2ServerSession session = null;
Socket clientSocket = null;
Stream stream = null;
try
{
clientSocket = await Task.Factory.FromAsync(_socket.BeginAccept, (Func<IAsyncResult, Socket>)_socket.EndAccept, null);
stream = new NetworkStream(clientSocket, ownsSocket: true);
X509Certificate clientCert = null;
if (_enableSsl)
{
SslStream sslStream = new SslStream(stream);
await sslStream.AuthenticateAsServerAsync(_serverCert, clientCertificateRequired: false, enabledSslProtocols: _sslProtocols, checkCertificateRevocation: false);
clientCert = sslStream.RemoteCertificate;
stream = sslStream;
}
// TODO: At this point we could read the first bit of the first byte received on this connection to determine if it is a HTTP/1.1 or 2.0 request.
IPEndPoint localEndPoint = (IPEndPoint)clientSocket.LocalEndPoint;
IPEndPoint remoteEndPoint = (IPEndPoint)clientSocket.RemoteEndPoint;
TransportInformation transportInfo = new TransportInformation()
{
ClientCertificate = clientCert,
LocalPort = localEndPoint.Port.ToString(CultureInfo.InvariantCulture),
RemotePort = remoteEndPoint.Port.ToString(CultureInfo.InvariantCulture),
};
// Side effect of using dual mode sockets, the IPv4 addresses look like 0::ffff:127.0.0.1.
if (localEndPoint.Address.IsIPv4MappedToIPv6)
{
transportInfo.LocalIpAddress = localEndPoint.Address.MapToIPv4().ToString();
}
else
{
transportInfo.LocalIpAddress = localEndPoint.Address.ToString();
}
if (remoteEndPoint.Address.IsIPv4MappedToIPv6)
{
transportInfo.RemoteIpAddress = remoteEndPoint.Address.MapToIPv4().ToString();
}
else
{
transportInfo.RemoteIpAddress = remoteEndPoint.Address.ToString();
}
session = new Http2ServerSession(_next, transportInfo);
// TODO: awaiting here will only let us accept the next connection/session after the current one finishes.
await session.Start(stream, CancellationToken.None);
}
catch (ProtocolViolationException)
{
// Handshake failure, most likely do to receiving a HTTP/1.1 text request.
}
catch (SocketException)
{
// Disconnect?
}
catch (ObjectDisposedException)
{
Dispose();
}
catch (Exception)
{
Dispose();
throw;
}
finally
{
if (session != null)
{
session.Dispose();
}
if (stream != null)
{
stream.Dispose();
}
if (clientSocket != null)
{
clientSocket.Dispose();
}
}
}
}
