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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.
// Stream ID and stream index handling.
use std::ops::AddAssign;
use neqo_common::Role;
use crate::connection::{LOCAL_STREAM_LIMIT_BIDI, LOCAL_STREAM_LIMIT_UNI};
use crate::frame::StreamType;
pub struct StreamIndexes {
pub local_max_stream_uni: StreamIndex,
pub local_max_stream_bidi: StreamIndex,
pub local_next_stream_uni: StreamIndex,
pub local_next_stream_bidi: StreamIndex,
pub remote_max_stream_uni: StreamIndex,
pub remote_max_stream_bidi: StreamIndex,
pub remote_next_stream_uni: StreamIndex,
pub remote_next_stream_bidi: StreamIndex,
}
impl StreamIndexes {
pub fn new() -> Self {
Self {
local_max_stream_bidi: StreamIndex::new(LOCAL_STREAM_LIMIT_BIDI),
local_max_stream_uni: StreamIndex::new(LOCAL_STREAM_LIMIT_UNI),
local_next_stream_uni: StreamIndex::new(0),
local_next_stream_bidi: StreamIndex::new(0),
remote_max_stream_bidi: StreamIndex::new(0),
remote_max_stream_uni: StreamIndex::new(0),
remote_next_stream_uni: StreamIndex::new(0),
remote_next_stream_bidi: StreamIndex::new(0),
}
}
}
#[derive(Debug, Eq, PartialEq, Clone, Copy, Ord, PartialOrd, Hash)]
pub struct StreamId(u64);
impl StreamId {
pub const fn new(id: u64) -> Self {
Self(id)
}
pub fn as_u64(self) -> u64 {
self.0
}
pub fn is_bidi(self) -> bool {
self.as_u64() & 0x02 == 0
}
pub fn is_uni(self) -> bool {
!self.is_bidi()
}
pub fn stream_type(self) -> StreamType {
if self.is_bidi() {
StreamType::BiDi
} else {
StreamType::UniDi
}
}
pub fn is_client_initiated(self) -> bool {
self.as_u64() & 0x01 == 0
}
pub fn is_server_initiated(self) -> bool {
!self.is_client_initiated()
}
pub fn role(self) -> Role {
if self.is_client_initiated() {
Role::Client
} else {
Role::Server
}
}
pub fn is_self_initiated(self, my_role: Role) -> bool {
match my_role {
Role::Client if self.is_client_initiated() => true,
Role::Server if self.is_server_initiated() => true,
_ => false,
}
}
pub fn is_remote_initiated(self, my_role: Role) -> bool {
!self.is_self_initiated(my_role)
}
pub fn is_send_only(self, my_role: Role) -> bool {
self.is_uni() && self.is_self_initiated(my_role)
}
pub fn is_recv_only(self, my_role: Role) -> bool {
self.is_uni() && self.is_remote_initiated(my_role)
}
}
impl From<u64> for StreamId {
fn from(val: u64) -> Self {
Self::new(val)
}
}
impl PartialEq<u64> for StreamId {
fn eq(&self, other: &u64) -> bool {
self.as_u64() == *other
}
}
impl ::std::fmt::Display for StreamId {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, "{}", self.as_u64())
}
}
#[derive(Debug, Eq, PartialEq, Clone, Copy, Ord, PartialOrd, Hash)]
pub struct StreamIndex(u64);
impl StreamIndex {
pub fn new(val: u64) -> Self {
Self(val)
}
pub fn to_stream_id(self, stream_type: StreamType, role: Role) -> StreamId {
let type_val = match stream_type {
StreamType::BiDi => 0,
StreamType::UniDi => 2,
};
let role_val = match role {
Role::Server => 1,
Role::Client => 0,
};
StreamId::from((self.0 << 2) + type_val + role_val)
}
pub fn as_u64(self) -> u64 {
self.0
}
}
impl From<StreamId> for StreamIndex {
fn from(val: StreamId) -> Self {
Self(val.as_u64() >> 2)
}
}
impl AddAssign<u64> for StreamIndex {
fn add_assign(&mut self, other: u64) {
*self = Self::new(self.as_u64() + other)
}
}
#[cfg(test)]
mod test {
use super::{StreamIndex, StreamType};
use neqo_common::Role;
#[test]
fn bidi_stream_properties() {
let id1 = StreamIndex::new(4).to_stream_id(StreamType::BiDi, Role::Client);
assert_eq!(id1.is_bidi(), true);
assert_eq!(id1.is_uni(), false);
assert_eq!(id1.is_client_initiated(), true);
assert_eq!(id1.is_server_initiated(), false);
assert_eq!(id1.role(), Role::Client);
assert_eq!(id1.is_self_initiated(Role::Client), true);
assert_eq!(id1.is_self_initiated(Role::Server), false);
assert_eq!(id1.is_remote_initiated(Role::Client), false);
assert_eq!(id1.is_remote_initiated(Role::Server), true);
assert_eq!(id1.is_send_only(Role::Server), false);
assert_eq!(id1.is_send_only(Role::Client), false);
assert_eq!(id1.is_recv_only(Role::Server), false);
assert_eq!(id1.is_recv_only(Role::Client), false);
assert_eq!(id1.as_u64(), 16);
}
#[test]
fn uni_stream_properties() {
let id2 = StreamIndex::new(8).to_stream_id(StreamType::UniDi, Role::Server);
assert_eq!(id2.is_bidi(), false);
assert_eq!(id2.is_uni(), true);
assert_eq!(id2.is_client_initiated(), false);
assert_eq!(id2.is_server_initiated(), true);
assert_eq!(id2.role(), Role::Server);
assert_eq!(id2.is_self_initiated(Role::Client), false);
assert_eq!(id2.is_self_initiated(Role::Server), true);
assert_eq!(id2.is_remote_initiated(Role::Client), true);
assert_eq!(id2.is_remote_initiated(Role::Server), false);
assert_eq!(id2.is_send_only(Role::Server), true);
assert_eq!(id2.is_send_only(Role::Client), false);
assert_eq!(id2.is_recv_only(Role::Server), false);
assert_eq!(id2.is_recv_only(Role::Client), true);
assert_eq!(id2.as_u64(), 35);
}
}
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