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|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use crate::connection::{HandleReadableOutput, Http3Connection, Http3State};
use crate::hframe::HFrame;
use crate::recv_message::{MessageType, RecvMessage};
use crate::send_message::SendMessage;
use crate::server_connection_events::{Http3ServerConnEvent, Http3ServerConnEvents};
use crate::{Error, Header, Res};
use neqo_common::{event::Provider, qdebug, qinfo, qtrace};
use neqo_qpack::QpackSettings;
use neqo_transport::{AppError, Connection, ConnectionEvent, StreamType};
use std::time::Instant;
#[derive(Debug)]
pub struct Http3ServerHandler {
base_handler: Http3Connection,
events: Http3ServerConnEvents,
needs_processing: bool,
}
impl ::std::fmt::Display for Http3ServerHandler {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, "Http3 server connection")
}
}
impl Http3ServerHandler {
pub(crate) fn new(qpack_settings: QpackSettings) -> Self {
Self {
base_handler: Http3Connection::new(qpack_settings),
events: Http3ServerConnEvents::default(),
needs_processing: false,
}
}
/// Supply a response for a request.
pub(crate) fn set_response(
&mut self,
stream_id: u64,
headers: &[Header],
data: &[u8],
) -> Res<()> {
self.base_handler
.send_streams
.get_mut(&stream_id)
.ok_or(Error::InvalidStreamId)?
.set_message(headers, Some(data))?;
self.base_handler
.insert_streams_have_data_to_send(stream_id);
Ok(())
}
/// Reset a request.
pub fn stream_reset(
&mut self,
conn: &mut Connection,
stream_id: u64,
app_error: AppError,
) -> Res<()> {
self.base_handler.stream_reset(conn, stream_id, app_error)?;
self.events.remove_events_for_stream_id(stream_id);
self.needs_processing = true;
Ok(())
}
/// Process HTTTP3 layer.
pub fn process_http3(&mut self, conn: &mut Connection, now: Instant) {
qtrace!([self], "Process http3 internal.");
if matches!(self.base_handler.state(), Http3State::Closed(..)) {
return;
}
let res = self.check_connection_events(conn, now);
if !self.check_result(conn, now, &res) && self.base_handler.state().active() {
let res = self.base_handler.process_sending(conn);
self.check_result(conn, now, &res);
}
}
/// Take the next available event.
pub(crate) fn next_event(&mut self) -> Option<Http3ServerConnEvent> {
self.events.next_event()
}
/// Whether this connection has events to process or data to send.
pub(crate) fn should_be_processed(&mut self) -> bool {
if self.needs_processing {
self.needs_processing = false;
return true;
}
self.base_handler.has_data_to_send() | self.events.has_events()
}
// This function takes the provided result and check for an error.
// An error results in closing the connection.
fn check_result<ERR>(&mut self, conn: &mut Connection, now: Instant, res: &Res<ERR>) -> bool {
match &res {
Err(e) => {
self.close(conn, now, e);
true
}
_ => false,
}
}
fn close(&mut self, conn: &mut Connection, now: Instant, err: &Error) {
qinfo!([self], "Connection error: {}.", err);
conn.close(now, err.code(), &format!("{}", err));
self.base_handler.close(err.code());
self.events
.connection_state_change(self.base_handler.state());
}
// If this return an error the connection must be closed.
fn check_connection_events(&mut self, conn: &mut Connection, now: Instant) -> Res<()> {
qtrace!([self], "Check connection events.");
while let Some(e) = conn.next_event() {
qdebug!([self], "check_connection_events - event {:?}.", e);
match e {
ConnectionEvent::NewStream { stream_id } => match stream_id.stream_type() {
StreamType::BiDi => self.base_handler.add_streams(
stream_id.as_u64(),
SendMessage::new(stream_id.as_u64(), Box::new(self.events.clone())),
Box::new(RecvMessage::new(
MessageType::Request,
stream_id.as_u64(),
Box::new(self.events.clone()),
None,
)),
),
StreamType::UniDi => {
if self
.base_handler
.handle_new_unidi_stream(conn, stream_id.as_u64())?
{
return Err(Error::HttpStreamCreation);
}
}
},
ConnectionEvent::RecvStreamReadable { stream_id } => {
self.handle_stream_readable(conn, stream_id)?
}
ConnectionEvent::RecvStreamReset {
stream_id,
app_error,
} => {
self.base_handler
.handle_stream_reset(stream_id, app_error)?;
}
ConnectionEvent::SendStreamStopSending {
stream_id,
app_error,
} => self
.base_handler
.handle_stream_stop_sending(stream_id, app_error)?,
ConnectionEvent::StateChange(state) => {
if self.base_handler.handle_state_change(conn, &state)? {
if self.base_handler.state() == Http3State::Connected {
let settings = self.base_handler.save_settings();
conn.send_ticket(now, &settings)?;
}
self.events
.connection_state_change(self.base_handler.state());
}
}
ConnectionEvent::AuthenticationNeeded
| ConnectionEvent::ZeroRttRejected
| ConnectionEvent::ResumptionToken(..) => return Err(Error::HttpInternal),
ConnectionEvent::SendStreamWritable { .. }
| ConnectionEvent::SendStreamComplete { .. }
| ConnectionEvent::SendStreamCreatable { .. } => {}
}
}
Ok(())
}
fn handle_stream_readable(&mut self, conn: &mut Connection, stream_id: u64) -> Res<()> {
match self.base_handler.handle_stream_readable(conn, stream_id)? {
HandleReadableOutput::PushStream => Err(Error::HttpStreamCreation),
HandleReadableOutput::ControlFrames(control_frames) => {
for f in control_frames {
match f {
HFrame::MaxPushId { .. } => {
// TODO implement push
Ok(())
}
HFrame::Goaway { .. } | HFrame::CancelPush { .. } => {
Err(Error::HttpFrameUnexpected)
}
_ => unreachable!(
"we should only put MaxPushId and Goaway into control_frames."
),
}?;
}
Ok(())
}
_ => Ok(()),
}
}
/// Response data are read directly into a buffer supplied as a parameter of this function to avoid copying
/// data.
/// # Errors
/// It returns an error if a stream does not exist or an error happen while reading a stream, e.g.
/// early close, protocol error, etc.
pub fn read_request_data(
&mut self,
conn: &mut Connection,
now: Instant,
stream_id: u64,
buf: &mut [u8],
) -> Res<(usize, bool)> {
qinfo!([self], "read_data from stream {}.", stream_id);
match self.base_handler.recv_streams.get_mut(&stream_id) {
None => {
self.close(conn, now, &Error::Internal);
Err(Error::Internal)
}
Some(recv_stream) => {
match recv_stream.read_data(conn, &mut self.base_handler.qpack_decoder, buf) {
Ok((amount, fin)) => {
if recv_stream.done() {
self.base_handler.recv_streams.remove(&stream_id);
}
Ok((amount, fin))
}
Err(e) => {
self.close(conn, now, &e);
Err(e)
}
}
}
}
}
}
|
