Thanks to all previous changes, it is now possible to move the
stream-interface into the conn-stream. To do so, some SI functions are
removed and their conn-stream counterparts are added. In addition, the
conn-stream is now responsible to create and release the
stream-interface. While the stream-interfaces were inlined in the stream
structure, there is now a pointer in the conn-stream. stream-interfaces are
now dynamically allocated. Thus a dedicated pool is added. It is a temporary
change because, at the end, the stream-interface structure will most
probably disappear.
This is required if we do not want to make haproxy crash during zerortt
interop runner test which makes a client open multiple streams with
long request paths.
Set the HTX EOM flag on RX the app layer. This is required to notify
about the end of the request for the stream analyzers, else the request
channel never goes to MSG_DONE state.
On h09 app layer, if there is not enought size in the tx buffer, the
transfer is interrupted and the flag QC_SF_BLK_MROOM is positionned.
The transfer is woken up by the mux when new buffer size becomes
available.
This ensure that no data is silently discarded during transfer. Without
this, once the buffer is full the data were removed and thus not send to
the client resulting in a truncating payload.
Handle the case when the app layer sending buffer is full. A new flag
QC_SF_BLK_MROOM is set in this case and the transfer is interrupted. It
is expected that then the conn-stream layer will subscribe to SEND.
The MROOM flag is reset each time the muxer transfer data from the app
layer to its own buffer. If the app layer has been subscribed on SEND it
is woken up.
Set the QC_SF_FIN_STREAM on the app layers (h3 / hq-interop) when
reaching the HTX EOM. This is used to warn the mux layer to set the FIN
on the QUIC stream.
Re-implement the QUIC mux. It will reuse the mechanics from the previous
mux without all untested/unsupported features. This should ease the
maintenance.
Note that a lot of features are broken for the moment. They will be
re-implemented on the following commits to have a clean commit history.
Implement a new app_ops layer for quic interop. This layer uses HTTP/0.9
on top of QUIC. Implementation is minimal, with the intent to be able to
pass interoperability test suite from
https://github.com/marten-seemann/quic-interop-runner.
It is instantiated if the negotiated ALPN is "hq-interop".
