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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use neqo_common::qdebug;
use neqo_transport::{Connection, StreamId};
use crate::{
frames::{FrameReader, HFrame, StreamReaderConnectionWrapper},
CloseType, Error, Http3StreamType, ReceiveOutput, RecvStream, Res, Stream,
};
/// The remote control stream is responsible only for reading frames. The frames are handled by
/// `Http3Connection`.
#[derive(Debug)]
pub(crate) struct ControlStreamRemote {
stream_id: StreamId,
frame_reader: FrameReader,
}
impl ::std::fmt::Display for ControlStreamRemote {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, "Http3 remote control stream {:?}", self.stream_id)
}
}
impl ControlStreamRemote {
pub fn new(stream_id: StreamId) -> Self {
Self {
stream_id,
frame_reader: FrameReader::new(),
}
}
/// Check if a stream is the control stream and read received data.
pub fn receive_single(&mut self, conn: &mut Connection) -> Res<Option<HFrame>> {
qdebug!([self], "Receiving data.");
match self
.frame_reader
.receive(&mut StreamReaderConnectionWrapper::new(
conn,
self.stream_id,
))? {
(_, true) => Err(Error::HttpClosedCriticalStream),
(s, false) => {
qdebug!([self], "received {:?}", s);
Ok(s)
}
}
}
}
impl Stream for ControlStreamRemote {
fn stream_type(&self) -> Http3StreamType {
Http3StreamType::Control
}
}
impl RecvStream for ControlStreamRemote {
fn reset(&mut self, _close_type: CloseType) -> Res<()> {
Err(Error::HttpClosedCriticalStream)
}
#[allow(clippy::vec_init_then_push)] // Clippy fail.
fn receive(&mut self, conn: &mut Connection) -> Res<(ReceiveOutput, bool)> {
let mut control_frames = Vec::new();
loop {
if let Some(f) = self.receive_single(conn)? {
control_frames.push(f);
} else {
return Ok((ReceiveOutput::ControlFrames(control_frames), false));
}
}
}
}