override protected bool HandleIncoming(MemBlock data, out MemBlock app_data)
{
app_data = null;
int count = 0;
lock (_buffer_sync) {
if (data != null)
{
data.CopyTo(_buffer, 0);
_read.Write(_buffer, data.Length);
}
count = _ssl.Read(_buffer, _buffer.Length);
if (count > 0)
{
app_data = MemBlock.Copy(_buffer, 0, count);
}
}
if (app_data != null)
{
// If the read was successful, Dtls has received an incoming data
// message and decrypted it
return(true);
}
else
{
SslError error = _ssl.GetError(count);
if (error == SslError.SSL_ERROR_WANT_READ)
{
if (SslState == SslState.OK)
{
UpdateState(States.Active);
// In the SslCtx verify, there's no way to get the underlying Sender
_ch.Verify(RemoteCertificate, Sender);
}
HandleWouldBlock();
}
else if (error == SslError.SSL_ERROR_SSL)
{
var ose = new OpenSslException();
Close("Received unrecoverable error: " + ose.ToString());
throw ose;
}
else if (error == SslError.SSL_ERROR_ZERO_RETURN)
{
Close("Received clean close notification");
}
else
{
ProtocolLog.WriteIf(ProtocolLog.SecurityExceptions,
"Receive other: " + error);
}
}
return(false);
}