When local SendProtocol is opening a Stream, it will send a empty message to QuicDrain which will then know that its time to open a quic stream.
It will open a QuicStream and send its SID over to remote.
The RecvStream will be send to local QuicSink
RemoteRecv will notice a new BiStream was opened and read its Sid. It will now start listening on it. while remote main will get the information that a stream was opened and will notice the frontend.
in participant remote Recv is synced with remote send (without triggering a empty message!).
RemoteRecv Sink will send the sendstream to RemoteSend Drain and it will be used when a first message is send on this stream.
- locally we open a stream, our local Drain is sending OpenStream
- remote Sink will know this and notify remote Drain
- remote side sends a message
- local sink does not know about the Stream. as there is (and CANT) be a wat to notify local Sink from local Drain (it could introduce race conditions).
One of the possible solutions was, that the remote drain will copy the OpenStream Msg ON the Quic::stream before first data is send. This would work but is complicated.
Instead we now just mark such streams as "potentially open" and we listen for the first DataHeader to get it's SID.
add support for unreliable messages in quic protocol, benchmarks
