// 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 std::cmp::min;
use neqo_common::qdebug;
use neqo_qpack
as qpack;
use neqo_transport::ConnectionParameters;
const QPACK_MAX_TABLE_SIZE_DEFAULT: u64 =
65536;
const QPACK_TABLE_SIZE_LIMIT: u64 = (
1 <<
30) -
1;
const QPACK_MAX_BLOCKED_STREAMS_DEFAULT: u16 =
20;
const MAX_PUSH_STREAM_DEFAULT: u64 =
0;
const WEBTRANSPORT_DEFAULT: bool =
false;
/// Do not support HTTP Extended CONNECT by default.
const CONNECT_DEFAULT: bool =
false;
const HTTP3_DATAGRAM_DEFAULT: bool =
true;
#[derive(Debug, Clone)]
pub struct Http3Parameters {
conn_params: ConnectionParameters,
qpack_settings: qpack::Settings,
max_concurrent_push_streams: u64,
webtransport: bool,
/// HTTP Extended CONNECT
connect: bool,
http3_datagram: bool,
}
impl Default
for Http3Parameters {
fn default() ->
Self {
Self {
conn_params: ConnectionParameters::default(),
qpack_settings: qpack::Settings {
max_table_size_encoder: QPACK_MAX_TABLE_SIZE_DEFAULT,
max_table_size_decoder: QPACK_MAX_TABLE_SIZE_DEFAULT,
max_blocked_streams: QPACK_MAX_BLOCKED_STREAMS_DEFAULT,
},
max_concurrent_push_streams: MAX_PUSH_STREAM_DEFAULT,
webtransport: WEBTRANSPORT_DEFAULT,
connect: CONNECT_DEFAULT,
http3_datagram: HTTP3_DATAGRAM_DEFAULT,
}
}
}
impl Http3Parameters {
#[must_use]
pub const fn get_connection_parameters(&
self) -> &ConnectionParameters {
&
self.conn_params
}
#[must_use]
pub fn connection_parameters(
mut self, conn_params: ConnectionParameters) ->
Self {
self.conn_params = conn_params;
self
}
/// # Panics
///
/// The table size must be smaller than 1 << 30 by the spec.
#[must_use]
pub fn max_table_size_encoder(
mut self,
mut max_table: u64) ->
Self {
assert!(max_table <= QPACK_TABLE_SIZE_LIMIT);
max_table = min(max_table, QPACK_TABLE_SIZE_LIMIT);
self.qpack_settings.max_table_size_encoder = max_table;
self
}
/// # Panics
///
/// The table size must be smaller than 1 << 30 by the spec.
#[must_use]
pub fn max_table_size_decoder(
mut self,
mut max_table: u64) ->
Self {
assert!(max_table <= QPACK_TABLE_SIZE_LIMIT);
max_table = min(max_table, QPACK_TABLE_SIZE_LIMIT);
self.qpack_settings.max_table_size_decoder = max_table;
self
}
#[must_use]
pub const fn get_max_table_size_decoder(&
self) -> u64 {
self.qpack_settings.max_table_size_decoder
}
#[must_use]
pub const fn max_blocked_streams(
mut self, max_blocked: u16) ->
Self {
self.qpack_settings.max_blocked_streams = max_blocked;
self
}
#[must_use]
pub const fn get_max_blocked_streams(&
self) -> u16 {
self.qpack_settings.max_blocked_streams
}
#[must_use]
pub const fn get_qpack_settings(&
self) -> &qpack::Settings {
&
self.qpack_settings
}
#[must_use]
pub const fn max_concurrent_push_streams(
mut self, max_push_streams: u64) ->
Self {
self.max_concurrent_push_streams = max_push_streams;
self
}
#[must_use]
pub const fn get_max_concurrent_push_streams(&
self) -> u64 {
self.max_concurrent_push_streams
}
#[must_use]
pub const fn webtransport(
mut self, webtransport: bool) ->
Self {
self.webtransport = webtransport;
self
}
#[must_use]
pub const fn get_webtransport(&
self) -> bool {
self.webtransport
}
/// Setter for HTTP Extended CONNECT support.
#[must_use]
pub const fn connect(
mut self, connect: bool) ->
Self {
self.connect = connect;
self
}
/// Getter for HTTP Extended CONNECT support.
#[must_use]
pub const fn get_connect(&
self) -> bool {
self.connect
}
#[must_use]
pub const fn http3_datagram(
mut self, http3_datagram: bool) ->
Self {
self.http3_datagram = http3_datagram;
self
}
#[must_use]
pub fn get_http3_datagram(&
self) -> bool {
if self.http3_datagram &&
self.conn_params.get_datagram_size() ==
0 {
qdebug!(
"HTTP/3 setting SETTINGS_H3_DATAGRAM is enabled but QUIC transport parameter max_datagram_frame_size is 0. Datagrams will be sent via HTTP DATAGRAM Capsules."
);
}
self.http3_datagram
}
}
#[cfg(test)]
#[cfg_attr(coverage_nightly, coverage(off))]
mod tests {
use neqo_transport::ConnectionParameters;
use crate::Http3Parameters;
#[test]
fn http3_datagram_with_capsules_only() {
let params = Http3Parameters::default()
.connection_parameters(ConnectionParameters::default().datagram_size(
0))
.http3_datagram(
true);
assert!(params.get_http3_datagram());
}
#[test]
fn max_table_size_accepts_limit() {
// QPACK spec limits table size to (1 << 30) - 1.
let limit = (
1 <<
30) -
1;
let params = Http3Parameters::default()
.max_table_size_encoder(limit)
.max_table_size_decoder(limit);
assert_eq!(params.get_qpack_settings().max_table_size_encoder, limit);
assert_eq!(params.get_qpack_settings().max_table_size_decoder, limit);
}
#[test]
#[should_panic(expected =
"assertion")]
fn max_table_size_encoder_rejects_above_limit() {
_ = Http3Parameters::default().max_table_size_encoder(
1 <<
30);
}
#[test]
#[should_panic(expected =
"assertion")]
fn max_table_size_decoder_rejects_above_limit() {
_ = Http3Parameters::default().max_table_size_decoder(
1 <<
30);
}
#[test]
fn http3_datagram_setting() {
let params = Http3Parameters::default()
.connection_parameters(ConnectionParameters::default().datagram_size(
1200))
.http3_datagram(
true);
assert!(params.get_http3_datagram());
}
}