fn classify_control(kind: ActionKind) -> SupportExpand description
The control site, which is honoured on every draft.
The site is shown every message the session’s control plane carries,
whichever shape that plane has. On drafts 07-16 the plane is the one
client-initiated bidirectional stream. On 17-20 it is a pair of
unidirectional streams — each peer opens one and begins it with SETUP —
and bidirectional streams carry requests; session.rs identifies the
pair by its stream type and pipes both it and the request streams through
the control path, so SETUP reaches the hook there too.
Draft-16 is both at once and is the only draft that is: a bidirectional control stream, and SUBSCRIBE_NAMESPACE on a bidirectional stream of its own beside it. Its request streams take the same control path, so this column reads the same for it as for every other draft.
tests/control_plane_uni.rs is the end-to-end reading behind this
column, and tests/draft16_request_streams.rs is the one for the draft
that needs both answers.