| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/h2-0.3.19/src/proto/streams/streams.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>streams.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../../normalize.css"><link rel="stylesheet" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../../ayu.css" disabled><link rel="stylesheet" href="../../../../dark.css" disabled><link rel="stylesheet" href="../../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../../storage.js"></script><script defer src="../../../../source-script.js"></script><script defer src="../../../../source-files.js"></script><script defer src="../../../../main.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../../h2/index.html"><div class="logo-container"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../../h2/index.html"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| <span id="1585">1585</span> |
| <span id="1586">1586</span> |
| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">super</span>::recv::RecvHeaderBlockError; |
| <span class="kw">use </span><span class="kw">super</span>::store::{<span class="self">self</span>, Entry, Resolve, Store}; |
| <span class="kw">use super</span>::{Buffer, Config, Counts, Prioritized, Recv, Send, Stream, StreamId}; |
| <span class="kw">use </span><span class="kw">crate</span>::codec::{Codec, SendError, UserError}; |
| <span class="kw">use </span><span class="kw">crate</span>::ext::Protocol; |
| <span class="kw">use </span><span class="kw">crate</span>::frame::{<span class="self">self</span>, Frame, Reason}; |
| <span class="kw">use </span><span class="kw">crate</span>::proto::{peer, Error, Initiator, Open, Peer, WindowSize}; |
| <span class="kw">use crate</span>::{client, proto, server}; |
| |
| <span class="kw">use </span>bytes::{Buf, Bytes}; |
| <span class="kw">use </span>http::{HeaderMap, Request, Response}; |
| <span class="kw">use </span>std::task::{Context, Poll, Waker}; |
| <span class="kw">use </span>tokio::io::AsyncWrite; |
| |
| <span class="kw">use </span>std::sync::{Arc, Mutex}; |
| <span class="kw">use </span>std::{fmt, io}; |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>Streams<B, P> |
| <span class="kw">where |
| </span>P: Peer, |
| { |
| <span class="doccomment">/// Holds most of the connection and stream related state for processing |
| /// HTTP/2 frames associated with streams. |
| </span>inner: Arc<Mutex<Inner>>, |
| |
| <span class="doccomment">/// This is the queue of frames to be written to the wire. This is split out |
| /// to avoid requiring a `B` generic on all public API types even if `B` is |
| /// not technically required. |
| /// |
| /// Currently, splitting this out requires a second `Arc` + `Mutex`. |
| /// However, it should be possible to avoid this duplication with a little |
| /// bit of unsafe code. This optimization has been postponed until it has |
| /// been shown to be necessary. |
| </span>send_buffer: Arc<SendBuffer<B>>, |
| |
| _p: ::std::marker::PhantomData<P>, |
| } |
| |
| <span class="comment">// Like `Streams` but with a `peer::Dyn` field instead of a static `P: Peer` type parameter. |
| // Ensures that the methods only get one instantiation, instead of two (client and server) |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>DynStreams<<span class="lifetime">'a</span>, B> { |
| inner: <span class="kw-2">&</span><span class="lifetime">'a </span>Mutex<Inner>, |
| |
| send_buffer: <span class="kw-2">&</span><span class="lifetime">'a </span>SendBuffer<B>, |
| |
| peer: peer::Dyn, |
| } |
| |
| <span class="doccomment">/// Reference to the stream state |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>StreamRef<B> { |
| opaque: OpaqueStreamRef, |
| send_buffer: Arc<SendBuffer<B>>, |
| } |
| |
| <span class="doccomment">/// Reference to the stream state that hides the send data chunk generic |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>OpaqueStreamRef { |
| inner: Arc<Mutex<Inner>>, |
| key: store::Key, |
| } |
| |
| <span class="doccomment">/// Fields needed to manage state related to managing the set of streams. This |
| /// is mostly split out to make ownership happy. |
| /// |
| /// TODO: better name |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">struct </span>Inner { |
| <span class="doccomment">/// Tracks send & recv stream concurrency. |
| </span>counts: Counts, |
| |
| <span class="doccomment">/// Connection level state and performs actions on streams |
| </span>actions: Actions, |
| |
| <span class="doccomment">/// Stores stream state |
| </span>store: Store, |
| |
| <span class="doccomment">/// The number of stream refs to this shared state. |
| </span>refs: usize, |
| } |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">struct </span>Actions { |
| <span class="doccomment">/// Manages state transitions initiated by receiving frames |
| </span>recv: Recv, |
| |
| <span class="doccomment">/// Manages state transitions initiated by sending frames |
| </span>send: Send, |
| |
| <span class="doccomment">/// Task that calls `poll_complete`. |
| </span>task: <span class="prelude-ty">Option</span><Waker>, |
| |
| <span class="doccomment">/// If the connection errors, a copy is kept for any StreamRefs. |
| </span>conn_error: <span class="prelude-ty">Option</span><proto::Error>, |
| } |
| |
| <span class="doccomment">/// Contains the buffer of frames to be written to the wire. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">struct </span>SendBuffer<B> { |
| inner: Mutex<Buffer<Frame<B>>>, |
| } |
| |
| <span class="comment">// ===== impl Streams ===== |
| |
| </span><span class="kw">impl</span><B, P> Streams<B, P> |
| <span class="kw">where |
| </span>B: Buf, |
| P: Peer, |
| { |
| <span class="kw">pub fn </span>new(config: Config) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>peer = P::r#dyn(); |
| |
| Streams { |
| inner: Inner::new(peer, config), |
| send_buffer: Arc::new(SendBuffer::new()), |
| _p: ::std::marker::PhantomData, |
| } |
| } |
| |
| <span class="kw">pub fn </span>set_target_connection_window_size(<span class="kw-2">&mut </span><span class="self">self</span>, size: WindowSize) { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| me.actions |
| .recv |
| .set_target_connection_window(size, <span class="kw-2">&mut </span>me.actions.task) |
| } |
| |
| <span class="kw">pub fn </span>next_incoming(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><StreamRef<B>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| me.actions.recv.next_incoming(<span class="kw-2">&mut </span>me.store).map(|key| { |
| <span class="kw">let </span>stream = <span class="kw-2">&mut </span>me.store.resolve(key); |
| <span class="macro">tracing::trace!</span>( |
| <span class="string">"next_incoming; id={:?}, state={:?}"</span>, |
| stream.id, |
| stream.state |
| ); |
| <span class="comment">// TODO: ideally, OpaqueStreamRefs::new would do this, but we're holding |
| // the lock, so it can't. |
| </span>me.refs += <span class="number">1</span>; |
| |
| <span class="comment">// Pending-accepted remotely-reset streams are counted. |
| </span><span class="kw">if </span>stream.state.is_remote_reset() { |
| me.counts.dec_num_remote_reset_streams(); |
| } |
| |
| StreamRef { |
| opaque: OpaqueStreamRef::new(<span class="self">self</span>.inner.clone(), stream), |
| send_buffer: <span class="self">self</span>.send_buffer.clone(), |
| } |
| }) |
| } |
| |
| <span class="kw">pub fn </span>send_pending_refusal<T>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| cx: <span class="kw-2">&mut </span>Context, |
| dst: <span class="kw-2">&mut </span>Codec<T, Prioritized<B>>, |
| ) -> Poll<io::Result<()>> |
| <span class="kw">where |
| </span>T: AsyncWrite + Unpin, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| me.actions.recv.send_pending_refusal(cx, dst) |
| } |
| |
| <span class="kw">pub fn </span>clear_expired_reset_streams(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| me.actions |
| .recv |
| .clear_expired_reset_streams(<span class="kw-2">&mut </span>me.store, <span class="kw-2">&mut </span>me.counts); |
| } |
| |
| <span class="kw">pub fn </span>poll_complete<T>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| cx: <span class="kw-2">&mut </span>Context, |
| dst: <span class="kw-2">&mut </span>Codec<T, Prioritized<B>>, |
| ) -> Poll<io::Result<()>> |
| <span class="kw">where |
| </span>T: AsyncWrite + Unpin, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.poll_complete(<span class="kw-2">&</span><span class="self">self</span>.send_buffer, cx, dst) |
| } |
| |
| <span class="kw">pub fn </span>apply_remote_settings(<span class="kw-2">&mut </span><span class="self">self</span>, frame: <span class="kw-2">&</span>frame::Settings) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = <span class="self">self</span>.send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| me.counts.apply_remote_settings(frame); |
| |
| me.actions.send.apply_remote_settings( |
| frame, |
| send_buffer, |
| <span class="kw-2">&mut </span>me.store, |
| <span class="kw-2">&mut </span>me.counts, |
| <span class="kw-2">&mut </span>me.actions.task, |
| ) |
| } |
| |
| <span class="kw">pub fn </span>apply_local_settings(<span class="kw-2">&mut </span><span class="self">self</span>, frame: <span class="kw-2">&</span>frame::Settings) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| me.actions.recv.apply_local_settings(frame, <span class="kw-2">&mut </span>me.store) |
| } |
| |
| <span class="kw">pub fn </span>send_request( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| <span class="kw-2">mut </span>request: Request<()>, |
| end_of_stream: bool, |
| pending: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>OpaqueStreamRef>, |
| ) -> <span class="prelude-ty">Result</span><StreamRef<B>, SendError> { |
| <span class="kw">use </span><span class="kw">super</span>::stream::ContentLength; |
| <span class="kw">use </span>http::Method; |
| |
| <span class="kw">let </span>protocol = request.extensions_mut().remove::<Protocol>(); |
| |
| <span class="comment">// Clear before taking lock, incase extensions contain a StreamRef. |
| </span>request.extensions_mut().clear(); |
| |
| <span class="comment">// TODO: There is a hazard with assigning a stream ID before the |
| // prioritize layer. If prioritization reorders new streams, this |
| // implicitly closes the earlier stream IDs. |
| // |
| // See: hyperium/h2#11 |
| </span><span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = <span class="self">self</span>.send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| me.actions.ensure_no_conn_error()<span class="question-mark">?</span>; |
| me.actions.send.ensure_next_stream_id()<span class="question-mark">?</span>; |
| |
| <span class="comment">// The `pending` argument is provided by the `Client`, and holds |
| // a store `Key` of a `Stream` that may have been not been opened |
| // yet. |
| // |
| // If that stream is still pending, the Client isn't allowed to |
| // queue up another pending stream. They should use `poll_ready`. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(stream) = pending { |
| <span class="kw">if </span>me.store.resolve(stream.key).is_pending_open { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(UserError::Rejected.into()); |
| } |
| } |
| |
| <span class="kw">if </span>me.counts.peer().is_server() { |
| <span class="comment">// Servers cannot open streams. PushPromise must first be reserved. |
| </span><span class="kw">return </span><span class="prelude-val">Err</span>(UserError::UnexpectedFrameType.into()); |
| } |
| |
| <span class="kw">let </span>stream_id = me.actions.send.open()<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = Stream::new( |
| stream_id, |
| me.actions.send.init_window_sz(), |
| me.actions.recv.init_window_sz(), |
| ); |
| |
| <span class="kw">if </span><span class="kw-2">*</span>request.method() == Method::HEAD { |
| stream.content_length = ContentLength::Head; |
| } |
| |
| <span class="comment">// Convert the message |
| </span><span class="kw">let </span>headers = |
| client::Peer::convert_send_message(stream_id, request, protocol, end_of_stream)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.insert(stream.id, stream); |
| |
| <span class="kw">let </span>sent = me.actions.send.send_headers( |
| headers, |
| send_buffer, |
| <span class="kw-2">&mut </span>stream, |
| <span class="kw-2">&mut </span>me.counts, |
| <span class="kw-2">&mut </span>me.actions.task, |
| ); |
| |
| <span class="comment">// send_headers can return a UserError, if it does, |
| // we should forget about this stream. |
| </span><span class="kw">if let </span><span class="prelude-val">Err</span>(err) = sent { |
| stream.unlink(); |
| stream.remove(); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(err.into()); |
| } |
| |
| <span class="comment">// Given that the stream has been initialized, it should not be in the |
| // closed state. |
| </span><span class="macro">debug_assert!</span>(!stream.state.is_closed()); |
| |
| <span class="comment">// TODO: ideally, OpaqueStreamRefs::new would do this, but we're holding |
| // the lock, so it can't. |
| </span>me.refs += <span class="number">1</span>; |
| |
| <span class="prelude-val">Ok</span>(StreamRef { |
| opaque: OpaqueStreamRef::new(<span class="self">self</span>.inner.clone(), <span class="kw-2">&mut </span>stream), |
| send_buffer: <span class="self">self</span>.send_buffer.clone(), |
| }) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>is_extended_connect_protocol_enabled(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.inner |
| .lock() |
| .unwrap() |
| .actions |
| .send |
| .is_extended_connect_protocol_enabled() |
| } |
| } |
| |
| <span class="kw">impl</span><B> DynStreams<<span class="lifetime">'_</span>, B> { |
| <span class="kw">pub fn </span>recv_headers(<span class="kw-2">&mut </span><span class="self">self</span>, frame: frame::Headers) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| |
| me.recv_headers(<span class="self">self</span>.peer, <span class="self">self</span>.send_buffer, frame) |
| } |
| |
| <span class="kw">pub fn </span>recv_data(<span class="kw-2">&mut </span><span class="self">self</span>, frame: frame::Data) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.recv_data(<span class="self">self</span>.peer, <span class="self">self</span>.send_buffer, frame) |
| } |
| |
| <span class="kw">pub fn </span>recv_reset(<span class="kw-2">&mut </span><span class="self">self</span>, frame: frame::Reset) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| |
| me.recv_reset(<span class="self">self</span>.send_buffer, frame) |
| } |
| |
| <span class="doccomment">/// Notify all streams that a connection-level error happened. |
| </span><span class="kw">pub fn </span>handle_error(<span class="kw-2">&mut </span><span class="self">self</span>, err: proto::Error) -> StreamId { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.handle_error(<span class="self">self</span>.send_buffer, err) |
| } |
| |
| <span class="kw">pub fn </span>recv_go_away(<span class="kw-2">&mut </span><span class="self">self</span>, frame: <span class="kw-2">&</span>frame::GoAway) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.recv_go_away(<span class="self">self</span>.send_buffer, frame) |
| } |
| |
| <span class="kw">pub fn </span>last_processed_id(<span class="kw-2">&</span><span class="self">self</span>) -> StreamId { |
| <span class="self">self</span>.inner.lock().unwrap().actions.recv.last_processed_id() |
| } |
| |
| <span class="kw">pub fn </span>recv_window_update(<span class="kw-2">&mut </span><span class="self">self</span>, frame: frame::WindowUpdate) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.recv_window_update(<span class="self">self</span>.send_buffer, frame) |
| } |
| |
| <span class="kw">pub fn </span>recv_push_promise(<span class="kw-2">&mut </span><span class="self">self</span>, frame: frame::PushPromise) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.recv_push_promise(<span class="self">self</span>.send_buffer, frame) |
| } |
| |
| <span class="kw">pub fn </span>recv_eof(<span class="kw-2">&mut </span><span class="self">self</span>, clear_pending_accept: bool) -> <span class="prelude-ty">Result</span><(), ()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().map_err(|<span class="kw">_</span>| ())<span class="question-mark">?</span>; |
| me.recv_eof(<span class="self">self</span>.send_buffer, clear_pending_accept) |
| } |
| |
| <span class="kw">pub fn </span>send_reset(<span class="kw-2">&mut </span><span class="self">self</span>, id: StreamId, reason: Reason) { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.send_reset(<span class="self">self</span>.send_buffer, id, reason) |
| } |
| |
| <span class="kw">pub fn </span>send_go_away(<span class="kw-2">&mut </span><span class="self">self</span>, last_processed_id: StreamId) { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.actions.recv.go_away(last_processed_id); |
| } |
| } |
| |
| <span class="kw">impl </span>Inner { |
| <span class="kw">fn </span>new(peer: peer::Dyn, config: Config) -> Arc<Mutex<<span class="self">Self</span>>> { |
| Arc::new(Mutex::new(Inner { |
| counts: Counts::new(peer, <span class="kw-2">&</span>config), |
| actions: Actions { |
| recv: Recv::new(peer, <span class="kw-2">&</span>config), |
| send: Send::new(<span class="kw-2">&</span>config), |
| task: <span class="prelude-val">None</span>, |
| conn_error: <span class="prelude-val">None</span>, |
| }, |
| store: Store::new(), |
| refs: <span class="number">1</span>, |
| })) |
| } |
| |
| <span class="kw">fn </span>recv_headers<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| peer: peer::Dyn, |
| send_buffer: <span class="kw-2">&</span>SendBuffer<B>, |
| frame: frame::Headers, |
| ) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span>id = frame.stream_id(); |
| |
| <span class="comment">// The GOAWAY process has begun. All streams with a greater ID than |
| // specified as part of GOAWAY should be ignored. |
| </span><span class="kw">if </span>id > <span class="self">self</span>.actions.recv.max_stream_id() { |
| <span class="macro">tracing::trace!</span>( |
| <span class="string">"id ({:?}) > max_stream_id ({:?}), ignoring HEADERS"</span>, |
| id, |
| <span class="self">self</span>.actions.recv.max_stream_id() |
| ); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| |
| <span class="kw">let </span>key = <span class="kw">match </span><span class="self">self</span>.store.find_entry(id) { |
| Entry::Occupied(e) => e.key(), |
| Entry::Vacant(e) => { |
| <span class="comment">// Client: it's possible to send a request, and then send |
| // a RST_STREAM while the response HEADERS were in transit. |
| // |
| // Server: we can't reset a stream before having received |
| // the request headers, so don't allow. |
| </span><span class="kw">if </span>!peer.is_server() { |
| <span class="comment">// This may be response headers for a stream we've already |
| // forgotten about... |
| </span><span class="kw">if </span><span class="self">self</span>.actions.may_have_forgotten_stream(peer, id) { |
| <span class="macro">tracing::debug!</span>( |
| <span class="string">"recv_headers for old stream={:?}, sending STREAM_CLOSED"</span>, |
| id, |
| ); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Error::library_reset(id, Reason::STREAM_CLOSED)); |
| } |
| } |
| |
| <span class="kw">match </span><span class="self">self |
| </span>.actions |
| .recv |
| .open(id, Open::Headers, <span class="kw-2">&mut </span><span class="self">self</span>.counts)<span class="question-mark">? |
| </span>{ |
| <span class="prelude-val">Some</span>(stream_id) => { |
| <span class="kw">let </span>stream = Stream::new( |
| stream_id, |
| <span class="self">self</span>.actions.send.init_window_sz(), |
| <span class="self">self</span>.actions.recv.init_window_sz(), |
| ); |
| |
| e.insert(stream) |
| } |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="prelude-val">Ok</span>(()), |
| } |
| } |
| }; |
| |
| <span class="kw">let </span>stream = <span class="self">self</span>.store.resolve(key); |
| |
| <span class="kw">if </span>stream.state.is_local_error() { |
| <span class="comment">// Locally reset streams must ignore frames "for some time". |
| // This is because the remote may have sent trailers before |
| // receiving the RST_STREAM frame. |
| </span><span class="macro">tracing::trace!</span>(<span class="string">"recv_headers; ignoring trailers on {:?}"</span>, stream.id); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span><span class="self">self</span>.actions; |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="self">self</span>.counts.transition(stream, |counts, stream| { |
| <span class="macro">tracing::trace!</span>( |
| <span class="string">"recv_headers; stream={:?}; state={:?}"</span>, |
| stream.id, |
| stream.state |
| ); |
| |
| <span class="kw">let </span>res = <span class="kw">if </span>stream.state.is_recv_headers() { |
| <span class="kw">match </span>actions.recv.recv_headers(frame, stream, counts) { |
| <span class="prelude-val">Ok</span>(()) => <span class="prelude-val">Ok</span>(()), |
| <span class="prelude-val">Err</span>(RecvHeaderBlockError::Oversize(resp)) => { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(resp) = resp { |
| <span class="kw">let </span>sent = actions.send.send_headers( |
| resp, send_buffer, stream, counts, <span class="kw-2">&mut </span>actions.task); |
| <span class="macro">debug_assert!</span>(sent.is_ok(), <span class="string">"oversize response should not fail"</span>); |
| |
| actions.send.schedule_implicit_reset( |
| stream, |
| Reason::REFUSED_STREAM, |
| counts, |
| <span class="kw-2">&mut </span>actions.task); |
| |
| actions.recv.enqueue_reset_expiration(stream, counts); |
| |
| <span class="prelude-val">Ok</span>(()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(Error::library_reset(stream.id, Reason::REFUSED_STREAM)) |
| } |
| }, |
| <span class="prelude-val">Err</span>(RecvHeaderBlockError::State(err)) => <span class="prelude-val">Err</span>(err), |
| } |
| } <span class="kw">else </span>{ |
| <span class="kw">if </span>!frame.is_end_stream() { |
| <span class="comment">// Receiving trailers that don't set EOS is a "malformed" |
| // message. Malformed messages are a stream error. |
| </span><span class="macro">proto_err!</span>(stream: <span class="string">"recv_headers: trailers frame was not EOS; stream={:?}"</span>, stream.id); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Error::library_reset(stream.id, Reason::PROTOCOL_ERROR)); |
| } |
| |
| actions.recv.recv_trailers(frame, stream) |
| }; |
| |
| actions.reset_on_recv_stream_err(send_buffer, stream, counts, res) |
| }) |
| } |
| |
| <span class="kw">fn </span>recv_data<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| peer: peer::Dyn, |
| send_buffer: <span class="kw-2">&</span>SendBuffer<B>, |
| frame: frame::Data, |
| ) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span>id = frame.stream_id(); |
| |
| <span class="kw">let </span>stream = <span class="kw">match </span><span class="self">self</span>.store.find_mut(<span class="kw-2">&</span>id) { |
| <span class="prelude-val">Some</span>(stream) => stream, |
| <span class="prelude-val">None </span>=> { |
| <span class="comment">// The GOAWAY process has begun. All streams with a greater ID |
| // than specified as part of GOAWAY should be ignored. |
| </span><span class="kw">if </span>id > <span class="self">self</span>.actions.recv.max_stream_id() { |
| <span class="macro">tracing::trace!</span>( |
| <span class="string">"id ({:?}) > max_stream_id ({:?}), ignoring DATA"</span>, |
| id, |
| <span class="self">self</span>.actions.recv.max_stream_id() |
| ); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| |
| <span class="kw">if </span><span class="self">self</span>.actions.may_have_forgotten_stream(peer, id) { |
| <span class="macro">tracing::debug!</span>(<span class="string">"recv_data for old stream={:?}, sending STREAM_CLOSED"</span>, id,); |
| |
| <span class="kw">let </span>sz = frame.payload().len(); |
| <span class="comment">// This should have been enforced at the codec::FramedRead layer, so |
| // this is just a sanity check. |
| </span><span class="macro">assert!</span>(sz <= <span class="kw">super</span>::MAX_WINDOW_SIZE <span class="kw">as </span>usize); |
| <span class="kw">let </span>sz = sz <span class="kw">as </span>WindowSize; |
| |
| <span class="self">self</span>.actions.recv.ignore_data(sz)<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Error::library_reset(id, Reason::STREAM_CLOSED)); |
| } |
| |
| <span class="macro">proto_err!</span>(conn: <span class="string">"recv_data: stream not found; id={:?}"</span>, id); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Error::library_go_away(Reason::PROTOCOL_ERROR)); |
| } |
| }; |
| |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span><span class="self">self</span>.actions; |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="self">self</span>.counts.transition(stream, |counts, stream| { |
| <span class="kw">let </span>sz = frame.payload().len(); |
| <span class="kw">let </span>res = actions.recv.recv_data(frame, stream); |
| |
| <span class="comment">// Any stream error after receiving a DATA frame means |
| // we won't give the data to the user, and so they can't |
| // release the capacity. We do it automatically. |
| </span><span class="kw">if let </span><span class="prelude-val">Err</span>(Error::Reset(..)) = res { |
| actions |
| .recv |
| .release_connection_capacity(sz <span class="kw">as </span>WindowSize, <span class="kw-2">&mut </span><span class="prelude-val">None</span>); |
| } |
| actions.reset_on_recv_stream_err(send_buffer, stream, counts, res) |
| }) |
| } |
| |
| <span class="kw">fn </span>recv_reset<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| send_buffer: <span class="kw-2">&</span>SendBuffer<B>, |
| frame: frame::Reset, |
| ) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span>id = frame.stream_id(); |
| |
| <span class="kw">if </span>id.is_zero() { |
| <span class="macro">proto_err!</span>(conn: <span class="string">"recv_reset: invalid stream ID 0"</span>); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Error::library_go_away(Reason::PROTOCOL_ERROR)); |
| } |
| |
| <span class="comment">// The GOAWAY process has begun. All streams with a greater ID than |
| // specified as part of GOAWAY should be ignored. |
| </span><span class="kw">if </span>id > <span class="self">self</span>.actions.recv.max_stream_id() { |
| <span class="macro">tracing::trace!</span>( |
| <span class="string">"id ({:?}) > max_stream_id ({:?}), ignoring RST_STREAM"</span>, |
| id, |
| <span class="self">self</span>.actions.recv.max_stream_id() |
| ); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| |
| <span class="kw">let </span>stream = <span class="kw">match </span><span class="self">self</span>.store.find_mut(<span class="kw-2">&</span>id) { |
| <span class="prelude-val">Some</span>(stream) => stream, |
| <span class="prelude-val">None </span>=> { |
| <span class="comment">// TODO: Are there other error cases? |
| </span><span class="self">self</span>.actions |
| .ensure_not_idle(<span class="self">self</span>.counts.peer(), id) |
| .map_err(Error::library_go_away)<span class="question-mark">?</span>; |
| |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span><span class="self">self</span>.actions; |
| |
| <span class="self">self</span>.counts.transition(stream, |counts, stream| { |
| actions.recv.recv_reset(frame, stream, counts)<span class="question-mark">?</span>; |
| actions.send.handle_error(send_buffer, stream, counts); |
| <span class="macro">assert!</span>(stream.state.is_closed()); |
| <span class="prelude-val">Ok</span>(()) |
| }) |
| } |
| |
| <span class="kw">fn </span>recv_window_update<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| send_buffer: <span class="kw-2">&</span>SendBuffer<B>, |
| frame: frame::WindowUpdate, |
| ) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span>id = frame.stream_id(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="kw">if </span>id.is_zero() { |
| <span class="self">self</span>.actions |
| .send |
| .recv_connection_window_update(frame, <span class="kw-2">&mut </span><span class="self">self</span>.store, <span class="kw-2">&mut </span><span class="self">self</span>.counts) |
| .map_err(Error::library_go_away)<span class="question-mark">?</span>; |
| } <span class="kw">else </span>{ |
| <span class="comment">// The remote may send window updates for streams that the local now |
| // considers closed. It's ok... |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">mut </span>stream) = <span class="self">self</span>.store.find_mut(<span class="kw-2">&</span>id) { |
| <span class="comment">// This result is ignored as there is nothing to do when there |
| // is an error. The stream is reset by the function on error and |
| // the error is informational. |
| </span><span class="kw">let _ </span>= <span class="self">self</span>.actions.send.recv_stream_window_update( |
| frame.size_increment(), |
| send_buffer, |
| <span class="kw-2">&mut </span>stream, |
| <span class="kw-2">&mut </span><span class="self">self</span>.counts, |
| <span class="kw-2">&mut </span><span class="self">self</span>.actions.task, |
| ); |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.actions |
| .ensure_not_idle(<span class="self">self</span>.counts.peer(), id) |
| .map_err(Error::library_go_away)<span class="question-mark">?</span>; |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>handle_error<B>(<span class="kw-2">&mut </span><span class="self">self</span>, send_buffer: <span class="kw-2">&</span>SendBuffer<B>, err: proto::Error) -> StreamId { |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span><span class="self">self</span>.actions; |
| <span class="kw">let </span>counts = <span class="kw-2">&mut </span><span class="self">self</span>.counts; |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="kw">let </span>last_processed_id = actions.recv.last_processed_id(); |
| |
| <span class="self">self</span>.store.for_each(|stream| { |
| counts.transition(stream, |counts, stream| { |
| actions.recv.handle_error(<span class="kw-2">&</span>err, <span class="kw-2">&mut *</span>stream); |
| actions.send.handle_error(send_buffer, stream, counts); |
| }) |
| }); |
| |
| actions.conn_error = <span class="prelude-val">Some</span>(err); |
| |
| last_processed_id |
| } |
| |
| <span class="kw">fn </span>recv_go_away<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| send_buffer: <span class="kw-2">&</span>SendBuffer<B>, |
| frame: <span class="kw-2">&</span>frame::GoAway, |
| ) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span><span class="self">self</span>.actions; |
| <span class="kw">let </span>counts = <span class="kw-2">&mut </span><span class="self">self</span>.counts; |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="kw">let </span>last_stream_id = frame.last_stream_id(); |
| |
| actions.send.recv_go_away(last_stream_id)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>err = Error::remote_go_away(frame.debug_data().clone(), frame.reason()); |
| |
| <span class="self">self</span>.store.for_each(|stream| { |
| <span class="kw">if </span>stream.id > last_stream_id { |
| counts.transition(stream, |counts, stream| { |
| actions.recv.handle_error(<span class="kw-2">&</span>err, <span class="kw-2">&mut *</span>stream); |
| actions.send.handle_error(send_buffer, stream, counts); |
| }) |
| } |
| }); |
| |
| actions.conn_error = <span class="prelude-val">Some</span>(err); |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>recv_push_promise<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| send_buffer: <span class="kw-2">&</span>SendBuffer<B>, |
| frame: frame::PushPromise, |
| ) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">let </span>id = frame.stream_id(); |
| <span class="kw">let </span>promised_id = frame.promised_id(); |
| |
| <span class="comment">// First, ensure that the initiating stream is still in a valid state. |
| </span><span class="kw">let </span>parent_key = <span class="kw">match </span><span class="self">self</span>.store.find_mut(<span class="kw-2">&</span>id) { |
| <span class="prelude-val">Some</span>(stream) => { |
| <span class="comment">// The GOAWAY process has begun. All streams with a greater ID |
| // than specified as part of GOAWAY should be ignored. |
| </span><span class="kw">if </span>id > <span class="self">self</span>.actions.recv.max_stream_id() { |
| <span class="macro">tracing::trace!</span>( |
| <span class="string">"id ({:?}) > max_stream_id ({:?}), ignoring PUSH_PROMISE"</span>, |
| id, |
| <span class="self">self</span>.actions.recv.max_stream_id() |
| ); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| |
| <span class="comment">// The stream must be receive open |
| </span>stream.state.ensure_recv_open()<span class="question-mark">?</span>; |
| stream.key() |
| } |
| <span class="prelude-val">None </span>=> { |
| <span class="macro">proto_err!</span>(conn: <span class="string">"recv_push_promise: initiating stream is in an invalid state"</span>); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Error::library_go_away(Reason::PROTOCOL_ERROR)); |
| } |
| }; |
| |
| <span class="comment">// TODO: Streams in the reserved states do not count towards the concurrency |
| // limit. However, it seems like there should be a cap otherwise this |
| // could grow in memory indefinitely. |
| |
| // Ensure that we can reserve streams |
| </span><span class="self">self</span>.actions.recv.ensure_can_reserve()<span class="question-mark">?</span>; |
| |
| <span class="comment">// Next, open the stream. |
| // |
| // If `None` is returned, then the stream is being refused. There is no |
| // further work to be done. |
| </span><span class="kw">if </span><span class="self">self |
| </span>.actions |
| .recv |
| .open(promised_id, Open::PushPromise, <span class="kw-2">&mut </span><span class="self">self</span>.counts)<span class="question-mark">? |
| </span>.is_none() |
| { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| |
| <span class="comment">// Try to handle the frame and create a corresponding key for the pushed stream |
| // this requires a bit of indirection to make the borrow checker happy. |
| </span><span class="kw">let </span>child_key: <span class="prelude-ty">Option</span><store::Key> = { |
| <span class="comment">// Create state for the stream |
| </span><span class="kw">let </span>stream = <span class="self">self</span>.store.insert(promised_id, { |
| Stream::new( |
| promised_id, |
| <span class="self">self</span>.actions.send.init_window_sz(), |
| <span class="self">self</span>.actions.recv.init_window_sz(), |
| ) |
| }); |
| |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span><span class="self">self</span>.actions; |
| |
| <span class="self">self</span>.counts.transition(stream, |counts, stream| { |
| <span class="kw">let </span>stream_valid = actions.recv.recv_push_promise(frame, stream); |
| |
| <span class="kw">match </span>stream_valid { |
| <span class="prelude-val">Ok</span>(()) => <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(stream.key())), |
| <span class="kw">_ </span>=> { |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| actions |
| .reset_on_recv_stream_err( |
| <span class="kw-2">&mut *</span>send_buffer, |
| stream, |
| counts, |
| stream_valid, |
| ) |
| .map(|()| <span class="prelude-val">None</span>) |
| } |
| } |
| })<span class="question-mark">? |
| </span>}; |
| <span class="comment">// If we're successful, push the headers and stream... |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(child) = child_key { |
| <span class="kw">let </span><span class="kw-2">mut </span>ppp = <span class="self">self</span>.store[parent_key].pending_push_promises.take(); |
| ppp.push(<span class="kw-2">&mut </span><span class="self">self</span>.store.resolve(child)); |
| |
| <span class="kw">let </span>parent = <span class="kw-2">&mut </span><span class="self">self</span>.store.resolve(parent_key); |
| parent.pending_push_promises = ppp; |
| parent.notify_recv(); |
| }; |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>recv_eof<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| send_buffer: <span class="kw-2">&</span>SendBuffer<B>, |
| clear_pending_accept: bool, |
| ) -> <span class="prelude-ty">Result</span><(), ()> { |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span><span class="self">self</span>.actions; |
| <span class="kw">let </span>counts = <span class="kw-2">&mut </span><span class="self">self</span>.counts; |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="kw">if </span>actions.conn_error.is_none() { |
| actions.conn_error = <span class="prelude-val">Some</span>( |
| io::Error::new( |
| io::ErrorKind::BrokenPipe, |
| <span class="string">"connection closed because of a broken pipe"</span>, |
| ) |
| .into(), |
| ); |
| } |
| |
| <span class="macro">tracing::trace!</span>(<span class="string">"Streams::recv_eof"</span>); |
| |
| <span class="self">self</span>.store.for_each(|stream| { |
| counts.transition(stream, |counts, stream| { |
| actions.recv.recv_eof(stream); |
| |
| <span class="comment">// This handles resetting send state associated with the |
| // stream |
| </span>actions.send.handle_error(send_buffer, stream, counts); |
| }) |
| }); |
| |
| actions.clear_queues(clear_pending_accept, <span class="kw-2">&mut </span><span class="self">self</span>.store, counts); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>poll_complete<T, B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| send_buffer: <span class="kw-2">&</span>SendBuffer<B>, |
| cx: <span class="kw-2">&mut </span>Context, |
| dst: <span class="kw-2">&mut </span>Codec<T, Prioritized<B>>, |
| ) -> Poll<io::Result<()>> |
| <span class="kw">where |
| </span>T: AsyncWrite + Unpin, |
| B: Buf, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="comment">// Send WINDOW_UPDATE frames first |
| // |
| // TODO: It would probably be better to interleave updates w/ data |
| // frames. |
| </span><span class="macro">ready!</span>(<span class="self">self |
| </span>.actions |
| .recv |
| .poll_complete(cx, <span class="kw-2">&mut </span><span class="self">self</span>.store, <span class="kw-2">&mut </span><span class="self">self</span>.counts, dst))<span class="question-mark">?</span>; |
| |
| <span class="comment">// Send any other pending frames |
| </span><span class="macro">ready!</span>(<span class="self">self</span>.actions.send.poll_complete( |
| cx, |
| send_buffer, |
| <span class="kw-2">&mut </span><span class="self">self</span>.store, |
| <span class="kw-2">&mut </span><span class="self">self</span>.counts, |
| dst |
| ))<span class="question-mark">?</span>; |
| |
| <span class="comment">// Nothing else to do, track the task |
| </span><span class="self">self</span>.actions.task = <span class="prelude-val">Some</span>(cx.waker().clone()); |
| |
| Poll::Ready(<span class="prelude-val">Ok</span>(())) |
| } |
| |
| <span class="kw">fn </span>send_reset<B>(<span class="kw-2">&mut </span><span class="self">self</span>, send_buffer: <span class="kw-2">&</span>SendBuffer<B>, id: StreamId, reason: Reason) { |
| <span class="kw">let </span>key = <span class="kw">match </span><span class="self">self</span>.store.find_entry(id) { |
| Entry::Occupied(e) => e.key(), |
| Entry::Vacant(e) => { |
| <span class="comment">// Resetting a stream we don't know about? That could be OK... |
| // |
| // 1. As a server, we just received a request, but that request |
| // was bad, so we're resetting before even accepting it. |
| // This is totally fine. |
| // |
| // 2. The remote may have sent us a frame on new stream that |
| // it's *not* supposed to have done, and thus, we don't know |
| // the stream. In that case, sending a reset will "open" the |
| // stream in our store. Maybe that should be a connection |
| // error instead? At least for now, we need to update what |
| // our vision of the next stream is. |
| </span><span class="kw">if </span><span class="self">self</span>.counts.peer().is_local_init(id) { |
| <span class="comment">// We normally would open this stream, so update our |
| // next-send-id record. |
| </span><span class="self">self</span>.actions.send.maybe_reset_next_stream_id(id); |
| } <span class="kw">else </span>{ |
| <span class="comment">// We normally would recv this stream, so update our |
| // next-recv-id record. |
| </span><span class="self">self</span>.actions.recv.maybe_reset_next_stream_id(id); |
| } |
| |
| <span class="kw">let </span>stream = Stream::new(id, <span class="number">0</span>, <span class="number">0</span>); |
| |
| e.insert(stream) |
| } |
| }; |
| |
| <span class="kw">let </span>stream = <span class="self">self</span>.store.resolve(key); |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| <span class="self">self</span>.actions.send_reset( |
| stream, |
| reason, |
| Initiator::Library, |
| <span class="kw-2">&mut </span><span class="self">self</span>.counts, |
| send_buffer, |
| ); |
| } |
| } |
| |
| <span class="kw">impl</span><B> Streams<B, client::Peer> |
| <span class="kw">where |
| </span>B: Buf, |
| { |
| <span class="kw">pub fn </span>poll_pending_open( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| cx: <span class="kw-2">&</span>Context, |
| pending: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>OpaqueStreamRef>, |
| ) -> Poll<<span class="prelude-ty">Result</span><(), <span class="kw">crate</span>::Error>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| me.actions.ensure_no_conn_error()<span class="question-mark">?</span>; |
| me.actions.send.ensure_next_stream_id()<span class="question-mark">?</span>; |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(pending) = pending { |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(pending.key); |
| <span class="macro">tracing::trace!</span>(<span class="string">"poll_pending_open; stream = {:?}"</span>, stream.is_pending_open); |
| <span class="kw">if </span>stream.is_pending_open { |
| stream.wait_send(cx); |
| <span class="kw">return </span>Poll::Pending; |
| } |
| } |
| Poll::Ready(<span class="prelude-val">Ok</span>(())) |
| } |
| } |
| |
| <span class="kw">impl</span><B, P> Streams<B, P> |
| <span class="kw">where |
| </span>P: Peer, |
| { |
| <span class="kw">pub fn </span>as_dyn(<span class="kw-2">&</span><span class="self">self</span>) -> DynStreams<B> { |
| <span class="kw">let </span><span class="self">Self </span>{ |
| inner, |
| send_buffer, |
| _p, |
| } = <span class="self">self</span>; |
| DynStreams { |
| inner, |
| send_buffer, |
| peer: P::r#dyn(), |
| } |
| } |
| |
| <span class="doccomment">/// This function is safe to call multiple times. |
| /// |
| /// A `Result` is returned to avoid panicking if the mutex is poisoned. |
| </span><span class="kw">pub fn </span>recv_eof(<span class="kw-2">&mut </span><span class="self">self</span>, clear_pending_accept: bool) -> <span class="prelude-ty">Result</span><(), ()> { |
| <span class="self">self</span>.as_dyn().recv_eof(clear_pending_accept) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>max_send_streams(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.inner.lock().unwrap().counts.max_send_streams() |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>max_recv_streams(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.inner.lock().unwrap().counts.max_recv_streams() |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"unstable"</span>)] |
| </span><span class="kw">pub fn </span>num_active_streams(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">let </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.store.num_active_streams() |
| } |
| |
| <span class="kw">pub fn </span>has_streams(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">let </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.counts.has_streams() |
| } |
| |
| <span class="kw">pub fn </span>has_streams_or_other_references(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">let </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.counts.has_streams() || me.refs > <span class="number">1 |
| </span>} |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"unstable"</span>)] |
| </span><span class="kw">pub fn </span>num_wired_streams(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">let </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| me.store.num_wired_streams() |
| } |
| } |
| |
| <span class="comment">// no derive because we don't need B and P to be Clone. |
| </span><span class="kw">impl</span><B, P> Clone <span class="kw">for </span>Streams<B, P> |
| <span class="kw">where |
| </span>P: Peer, |
| { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="self">self</span>.inner.lock().unwrap().refs += <span class="number">1</span>; |
| Streams { |
| inner: <span class="self">self</span>.inner.clone(), |
| send_buffer: <span class="self">self</span>.send_buffer.clone(), |
| _p: ::std::marker::PhantomData, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><B, P> Drop <span class="kw">for </span>Streams<B, P> |
| <span class="kw">where |
| </span>P: Peer, |
| { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>inner) = <span class="self">self</span>.inner.lock() { |
| inner.refs -= <span class="number">1</span>; |
| <span class="kw">if </span>inner.refs == <span class="number">1 </span>{ |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(task) = inner.actions.task.take() { |
| task.wake(); |
| } |
| } |
| } |
| } |
| } |
| |
| <span class="comment">// ===== impl StreamRef ===== |
| |
| </span><span class="kw">impl</span><B> StreamRef<B> { |
| <span class="kw">pub fn </span>send_data(<span class="kw-2">&mut </span><span class="self">self</span>, data: B, end_stream: bool) -> <span class="prelude-ty">Result</span><(), UserError> |
| <span class="kw">where |
| </span>B: Buf, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span>me.actions; |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = <span class="self">self</span>.send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| me.counts.transition(stream, |counts, stream| { |
| <span class="comment">// Create the data frame |
| </span><span class="kw">let </span><span class="kw-2">mut </span>frame = frame::Data::new(stream.id, data); |
| frame.set_end_stream(end_stream); |
| |
| <span class="comment">// Send the data frame |
| </span>actions |
| .send |
| .send_data(frame, send_buffer, stream, counts, <span class="kw-2">&mut </span>actions.task) |
| }) |
| } |
| |
| <span class="kw">pub fn </span>send_trailers(<span class="kw-2">&mut </span><span class="self">self</span>, trailers: HeaderMap) -> <span class="prelude-ty">Result</span><(), UserError> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span>me.actions; |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = <span class="self">self</span>.send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| me.counts.transition(stream, |counts, stream| { |
| <span class="comment">// Create the trailers frame |
| </span><span class="kw">let </span>frame = frame::Headers::trailers(stream.id, trailers); |
| |
| <span class="comment">// Send the trailers frame |
| </span>actions |
| .send |
| .send_trailers(frame, send_buffer, stream, counts, <span class="kw-2">&mut </span>actions.task) |
| }) |
| } |
| |
| <span class="kw">pub fn </span>send_reset(<span class="kw-2">&mut </span><span class="self">self</span>, reason: Reason) { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = <span class="self">self</span>.send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| me.actions |
| .send_reset(stream, reason, Initiator::User, <span class="kw-2">&mut </span>me.counts, send_buffer); |
| } |
| |
| <span class="kw">pub fn </span>send_response( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| <span class="kw-2">mut </span>response: Response<()>, |
| end_of_stream: bool, |
| ) -> <span class="prelude-ty">Result</span><(), UserError> { |
| <span class="comment">// Clear before taking lock, incase extensions contain a StreamRef. |
| </span>response.extensions_mut().clear(); |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span>me.actions; |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = <span class="self">self</span>.send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| me.counts.transition(stream, |counts, stream| { |
| <span class="kw">let </span>frame = server::Peer::convert_send_message(stream.id, response, end_of_stream); |
| |
| actions |
| .send |
| .send_headers(frame, send_buffer, stream, counts, <span class="kw-2">&mut </span>actions.task) |
| }) |
| } |
| |
| <span class="kw">pub fn </span>send_push_promise( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| <span class="kw-2">mut </span>request: Request<()>, |
| ) -> <span class="prelude-ty">Result</span><StreamRef<B>, UserError> { |
| <span class="comment">// Clear before taking lock, incase extensions contain a StreamRef. |
| </span>request.extensions_mut().clear(); |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>send_buffer = <span class="self">self</span>.send_buffer.inner.lock().unwrap(); |
| <span class="kw">let </span>send_buffer = <span class="kw-2">&mut *</span>send_buffer; |
| |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span>me.actions; |
| <span class="kw">let </span>promised_id = actions.send.reserve_local()<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>child_key = { |
| <span class="kw">let </span><span class="kw-2">mut </span>child_stream = me.store.insert( |
| promised_id, |
| Stream::new( |
| promised_id, |
| actions.send.init_window_sz(), |
| actions.recv.init_window_sz(), |
| ), |
| ); |
| child_stream.state.reserve_local()<span class="question-mark">?</span>; |
| child_stream.is_pending_push = <span class="bool-val">true</span>; |
| child_stream.key() |
| }; |
| |
| <span class="kw">let </span>pushed = { |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| |
| <span class="kw">let </span>frame = <span class="kw">crate</span>::server::Peer::convert_push_message(stream.id, promised_id, request)<span class="question-mark">?</span>; |
| |
| actions |
| .send |
| .send_push_promise(frame, send_buffer, <span class="kw-2">&mut </span>stream, <span class="kw-2">&mut </span>actions.task) |
| }; |
| |
| <span class="kw">if let </span><span class="prelude-val">Err</span>(err) = pushed { |
| <span class="kw">let </span><span class="kw-2">mut </span>child_stream = me.store.resolve(child_key); |
| child_stream.unlink(); |
| child_stream.remove(); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(err); |
| } |
| |
| me.refs += <span class="number">1</span>; |
| <span class="kw">let </span>opaque = |
| OpaqueStreamRef::new(<span class="self">self</span>.opaque.inner.clone(), <span class="kw-2">&mut </span>me.store.resolve(child_key)); |
| |
| <span class="prelude-val">Ok</span>(StreamRef { |
| opaque, |
| send_buffer: <span class="self">self</span>.send_buffer.clone(), |
| }) |
| } |
| |
| <span class="doccomment">/// Called by the server after the stream is accepted. Given that clients |
| /// initialize streams by sending HEADERS, the request will always be |
| /// available. |
| /// |
| /// # Panics |
| /// |
| /// This function panics if the request isn't present. |
| </span><span class="kw">pub fn </span>take_request(<span class="kw-2">&</span><span class="self">self</span>) -> Request<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| me.actions.recv.take_request(<span class="kw-2">&mut </span>stream) |
| } |
| |
| <span class="doccomment">/// Called by a client to see if the current stream is pending open |
| </span><span class="kw">pub fn </span>is_pending_open(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| me.store.resolve(<span class="self">self</span>.opaque.key).is_pending_open |
| } |
| |
| <span class="doccomment">/// Request capacity to send data |
| </span><span class="kw">pub fn </span>reserve_capacity(<span class="kw-2">&mut </span><span class="self">self</span>, capacity: WindowSize) { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| |
| me.actions |
| .send |
| .reserve_capacity(capacity, <span class="kw-2">&mut </span>stream, <span class="kw-2">&mut </span>me.counts) |
| } |
| |
| <span class="doccomment">/// Returns the stream's current send capacity. |
| </span><span class="kw">pub fn </span>capacity(<span class="kw-2">&</span><span class="self">self</span>) -> WindowSize { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| |
| me.actions.send.capacity(<span class="kw-2">&mut </span>stream) |
| } |
| |
| <span class="doccomment">/// Request to be notified when the stream's capacity increases |
| </span><span class="kw">pub fn </span>poll_capacity(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&</span>Context) -> Poll<<span class="prelude-ty">Option</span><<span class="prelude-ty">Result</span><WindowSize, UserError>>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| |
| me.actions.send.poll_capacity(cx, <span class="kw-2">&mut </span>stream) |
| } |
| |
| <span class="doccomment">/// Request to be notified for if a `RST_STREAM` is received for this stream. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>poll_reset( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| cx: <span class="kw-2">&</span>Context, |
| mode: proto::PollReset, |
| ) -> Poll<<span class="prelude-ty">Result</span><Reason, <span class="kw">crate</span>::Error>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.opaque.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.opaque.key); |
| |
| me.actions |
| .send |
| .poll_reset(cx, <span class="kw-2">&mut </span>stream, mode) |
| .map_err(From::from) |
| } |
| |
| <span class="kw">pub fn </span>clone_to_opaque(<span class="kw-2">&</span><span class="self">self</span>) -> OpaqueStreamRef { |
| <span class="self">self</span>.opaque.clone() |
| } |
| |
| <span class="kw">pub fn </span>stream_id(<span class="kw-2">&</span><span class="self">self</span>) -> StreamId { |
| <span class="self">self</span>.opaque.stream_id() |
| } |
| } |
| |
| <span class="kw">impl</span><B> Clone <span class="kw">for </span>StreamRef<B> { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| StreamRef { |
| opaque: <span class="self">self</span>.opaque.clone(), |
| send_buffer: <span class="self">self</span>.send_buffer.clone(), |
| } |
| } |
| } |
| |
| <span class="comment">// ===== impl OpaqueStreamRef ===== |
| |
| </span><span class="kw">impl </span>OpaqueStreamRef { |
| <span class="kw">fn </span>new(inner: Arc<Mutex<Inner>>, stream: <span class="kw-2">&mut </span>store::Ptr) -> OpaqueStreamRef { |
| stream.ref_inc(); |
| OpaqueStreamRef { |
| inner, |
| key: stream.key(), |
| } |
| } |
| <span class="doccomment">/// Called by a client to check for a received response. |
| </span><span class="kw">pub fn </span>poll_response(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&</span>Context) -> Poll<<span class="prelude-ty">Result</span><Response<()>, proto::Error>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.key); |
| |
| me.actions.recv.poll_response(cx, <span class="kw-2">&mut </span>stream) |
| } |
| <span class="doccomment">/// Called by a client to check for a pushed request. |
| </span><span class="kw">pub fn </span>poll_pushed( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| cx: <span class="kw-2">&</span>Context, |
| ) -> Poll<<span class="prelude-ty">Option</span><<span class="prelude-ty">Result</span><(Request<()>, OpaqueStreamRef), proto::Error>>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.key); |
| me.actions |
| .recv |
| .poll_pushed(cx, <span class="kw-2">&mut </span>stream) |
| .map_ok(|(h, key)| { |
| me.refs += <span class="number">1</span>; |
| <span class="kw">let </span>opaque_ref = |
| OpaqueStreamRef::new(<span class="self">self</span>.inner.clone(), <span class="kw-2">&mut </span>me.store.resolve(key)); |
| (h, opaque_ref) |
| }) |
| } |
| |
| <span class="kw">pub fn </span>is_end_stream(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span>stream = me.store.resolve(<span class="self">self</span>.key); |
| |
| me.actions.recv.is_end_stream(<span class="kw-2">&</span>stream) |
| } |
| |
| <span class="kw">pub fn </span>poll_data(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&</span>Context) -> Poll<<span class="prelude-ty">Option</span><<span class="prelude-ty">Result</span><Bytes, proto::Error>>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.key); |
| |
| me.actions.recv.poll_data(cx, <span class="kw-2">&mut </span>stream) |
| } |
| |
| <span class="kw">pub fn </span>poll_trailers(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&</span>Context) -> Poll<<span class="prelude-ty">Option</span><<span class="prelude-ty">Result</span><HeaderMap, proto::Error>>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.key); |
| |
| me.actions.recv.poll_trailers(cx, <span class="kw-2">&mut </span>stream) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>available_recv_capacity(<span class="kw-2">&</span><span class="self">self</span>) -> isize { |
| <span class="kw">let </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&*</span>me; |
| |
| <span class="kw">let </span>stream = <span class="kw-2">&</span>me.store[<span class="self">self</span>.key]; |
| stream.recv_flow.available().into() |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>used_recv_capacity(<span class="kw-2">&</span><span class="self">self</span>) -> WindowSize { |
| <span class="kw">let </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&*</span>me; |
| |
| <span class="kw">let </span>stream = <span class="kw-2">&</span>me.store[<span class="self">self</span>.key]; |
| stream.in_flight_recv_data |
| } |
| |
| <span class="doccomment">/// Releases recv capacity back to the peer. This may result in sending |
| /// WINDOW_UPDATE frames on both the stream and connection. |
| </span><span class="kw">pub fn </span>release_capacity(<span class="kw-2">&mut </span><span class="self">self</span>, capacity: WindowSize) -> <span class="prelude-ty">Result</span><(), UserError> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.key); |
| |
| me.actions |
| .recv |
| .release_capacity(capacity, <span class="kw-2">&mut </span>stream, <span class="kw-2">&mut </span>me.actions.task) |
| } |
| |
| <span class="doccomment">/// Clear the receive queue and set the status to no longer receive data frames. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>clear_recv_buffer(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.inner.lock().unwrap(); |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(<span class="self">self</span>.key); |
| stream.is_recv = <span class="bool-val">false</span>; |
| me.actions.recv.clear_recv_buffer(<span class="kw-2">&mut </span>stream); |
| } |
| |
| <span class="kw">pub fn </span>stream_id(<span class="kw-2">&</span><span class="self">self</span>) -> StreamId { |
| <span class="self">self</span>.inner.lock().unwrap().store[<span class="self">self</span>.key].id |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>OpaqueStreamRef { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, fmt: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="kw">use </span>std::sync::TryLockError::<span class="kw-2">*</span>; |
| |
| <span class="kw">match </span><span class="self">self</span>.inner.try_lock() { |
| <span class="prelude-val">Ok</span>(me) => { |
| <span class="kw">let </span>stream = <span class="kw-2">&</span>me.store[<span class="self">self</span>.key]; |
| fmt.debug_struct(<span class="string">"OpaqueStreamRef"</span>) |
| .field(<span class="string">"stream_id"</span>, <span class="kw-2">&</span>stream.id) |
| .field(<span class="string">"ref_count"</span>, <span class="kw-2">&</span>stream.ref_count) |
| .finish() |
| } |
| <span class="prelude-val">Err</span>(Poisoned(<span class="kw">_</span>)) => fmt |
| .debug_struct(<span class="string">"OpaqueStreamRef"</span>) |
| .field(<span class="string">"inner"</span>, <span class="kw-2">&</span><span class="string">"<Poisoned>"</span>) |
| .finish(), |
| <span class="prelude-val">Err</span>(WouldBlock) => fmt |
| .debug_struct(<span class="string">"OpaqueStreamRef"</span>) |
| .field(<span class="string">"inner"</span>, <span class="kw-2">&</span><span class="string">"<Locked>"</span>) |
| .finish(), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Clone <span class="kw">for </span>OpaqueStreamRef { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="comment">// Increment the ref count |
| </span><span class="kw">let </span><span class="kw-2">mut </span>inner = <span class="self">self</span>.inner.lock().unwrap(); |
| inner.store.resolve(<span class="self">self</span>.key).ref_inc(); |
| inner.refs += <span class="number">1</span>; |
| |
| OpaqueStreamRef { |
| inner: <span class="self">self</span>.inner.clone(), |
| key: <span class="self">self</span>.key, |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Drop <span class="kw">for </span>OpaqueStreamRef { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| drop_stream_ref(<span class="kw-2">&</span><span class="self">self</span>.inner, <span class="self">self</span>.key); |
| } |
| } |
| |
| <span class="comment">// TODO: Move back in fn above |
| </span><span class="kw">fn </span>drop_stream_ref(inner: <span class="kw-2">&</span>Mutex<Inner>, key: store::Key) { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="kw">match </span>inner.lock() { |
| <span class="prelude-val">Ok</span>(inner) => inner, |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => { |
| <span class="kw">if </span>::std::thread::panicking() { |
| <span class="macro">tracing::trace!</span>(<span class="string">"StreamRef::drop; mutex poisoned"</span>); |
| <span class="kw">return</span>; |
| } <span class="kw">else </span>{ |
| <span class="macro">panic!</span>(<span class="string">"StreamRef::drop; mutex poisoned"</span>); |
| } |
| } |
| }; |
| |
| <span class="kw">let </span>me = <span class="kw-2">&mut *</span>me; |
| me.refs -= <span class="number">1</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>stream = me.store.resolve(key); |
| |
| <span class="macro">tracing::trace!</span>(<span class="string">"drop_stream_ref; stream={:?}"</span>, stream); |
| |
| <span class="comment">// decrement the stream's ref count by 1. |
| </span>stream.ref_dec(); |
| |
| <span class="kw">let </span>actions = <span class="kw-2">&mut </span>me.actions; |
| |
| <span class="comment">// If the stream is not referenced and it is already |
| // closed (does not have to go through logic below |
| // of canceling the stream), we should notify the task |
| // (connection) so that it can close properly |
| </span><span class="kw">if </span>stream.ref_count == <span class="number">0 </span>&& stream.is_closed() { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(task) = actions.task.take() { |
| task.wake(); |
| } |
| } |
| |
| me.counts.transition(stream, |counts, stream| { |
| maybe_cancel(stream, actions, counts); |
| |
| <span class="kw">if </span>stream.ref_count == <span class="number">0 </span>{ |
| <span class="comment">// Release any recv window back to connection, no one can access |
| // it anymore. |
| </span>actions |
| .recv |
| .release_closed_capacity(stream, <span class="kw-2">&mut </span>actions.task); |
| |
| <span class="comment">// We won't be able to reach our push promises anymore |
| </span><span class="kw">let </span><span class="kw-2">mut </span>ppp = stream.pending_push_promises.take(); |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(promise) = ppp.pop(stream.store_mut()) { |
| counts.transition(promise, |counts, stream| { |
| maybe_cancel(stream, actions, counts); |
| }); |
| } |
| } |
| }); |
| } |
| |
| <span class="kw">fn </span>maybe_cancel(stream: <span class="kw-2">&mut </span>store::Ptr, actions: <span class="kw-2">&mut </span>Actions, counts: <span class="kw-2">&mut </span>Counts) { |
| <span class="kw">if </span>stream.is_canceled_interest() { |
| <span class="comment">// Server is allowed to early respond without fully consuming the client input stream |
| // But per the RFC, must send a RST_STREAM(NO_ERROR) in such cases. https://www.rfc-editor.org/rfc/rfc7540#section-8.1 |
| // Some other http2 implementation may interpret other error code as fatal if not respected (i.e: nginx https://trac.nginx.org/nginx/ticket/2376) |
| </span><span class="kw">let </span>reason = <span class="kw">if </span>counts.peer().is_server() |
| && stream.state.is_send_closed() |
| && stream.state.is_recv_streaming() |
| { |
| Reason::NO_ERROR |
| } <span class="kw">else </span>{ |
| Reason::CANCEL |
| }; |
| |
| actions |
| .send |
| .schedule_implicit_reset(stream, reason, counts, <span class="kw-2">&mut </span>actions.task); |
| actions.recv.enqueue_reset_expiration(stream, counts); |
| } |
| } |
| |
| <span class="comment">// ===== impl SendBuffer ===== |
| |
| </span><span class="kw">impl</span><B> SendBuffer<B> { |
| <span class="kw">fn </span>new() -> <span class="self">Self </span>{ |
| <span class="kw">let </span>inner = Mutex::new(Buffer::new()); |
| SendBuffer { inner } |
| } |
| } |
| |
| <span class="comment">// ===== impl Actions ===== |
| |
| </span><span class="kw">impl </span>Actions { |
| <span class="kw">fn </span>send_reset<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| stream: store::Ptr, |
| reason: Reason, |
| initiator: Initiator, |
| counts: <span class="kw-2">&mut </span>Counts, |
| send_buffer: <span class="kw-2">&mut </span>Buffer<Frame<B>>, |
| ) { |
| counts.transition(stream, |counts, stream| { |
| <span class="self">self</span>.send.send_reset( |
| reason, |
| initiator, |
| send_buffer, |
| stream, |
| counts, |
| <span class="kw-2">&mut </span><span class="self">self</span>.task, |
| ); |
| <span class="self">self</span>.recv.enqueue_reset_expiration(stream, counts); |
| <span class="comment">// if a RecvStream is parked, ensure it's notified |
| </span>stream.notify_recv(); |
| }); |
| } |
| |
| <span class="kw">fn </span>reset_on_recv_stream_err<B>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| buffer: <span class="kw-2">&mut </span>Buffer<Frame<B>>, |
| stream: <span class="kw-2">&mut </span>store::Ptr, |
| counts: <span class="kw-2">&mut </span>Counts, |
| res: <span class="prelude-ty">Result</span><(), Error>, |
| ) -> <span class="prelude-ty">Result</span><(), Error> { |
| <span class="kw">if let </span><span class="prelude-val">Err</span>(Error::Reset(stream_id, reason, initiator)) = res { |
| <span class="macro">debug_assert_eq!</span>(stream_id, stream.id); |
| <span class="comment">// Reset the stream. |
| </span><span class="self">self</span>.send |
| .send_reset(reason, initiator, buffer, stream, counts, <span class="kw-2">&mut </span><span class="self">self</span>.task); |
| <span class="prelude-val">Ok</span>(()) |
| } <span class="kw">else </span>{ |
| res |
| } |
| } |
| |
| <span class="kw">fn </span>ensure_not_idle(<span class="kw-2">&mut </span><span class="self">self</span>, peer: peer::Dyn, id: StreamId) -> <span class="prelude-ty">Result</span><(), Reason> { |
| <span class="kw">if </span>peer.is_local_init(id) { |
| <span class="self">self</span>.send.ensure_not_idle(id) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.recv.ensure_not_idle(id) |
| } |
| } |
| |
| <span class="kw">fn </span>ensure_no_conn_error(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><(), proto::Error> { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>err) = <span class="self">self</span>.conn_error { |
| <span class="prelude-val">Err</span>(err.clone()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="doccomment">/// Check if we possibly could have processed and since forgotten this stream. |
| /// |
| /// If we send a RST_STREAM for a stream, we will eventually "forget" about |
| /// the stream to free up memory. It's possible that the remote peer had |
| /// frames in-flight, and by the time we receive them, our own state is |
| /// gone. We *could* tear everything down by sending a GOAWAY, but it |
| /// is more likely to be latency/memory constraints that caused this, |
| /// and not a bad actor. So be less catastrophic, the spec allows |
| /// us to send another RST_STREAM of STREAM_CLOSED. |
| </span><span class="kw">fn </span>may_have_forgotten_stream(<span class="kw-2">&</span><span class="self">self</span>, peer: peer::Dyn, id: StreamId) -> bool { |
| <span class="kw">if </span>id.is_zero() { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| <span class="kw">if </span>peer.is_local_init(id) { |
| <span class="self">self</span>.send.may_have_created_stream(id) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.recv.may_have_created_stream(id) |
| } |
| } |
| |
| <span class="kw">fn </span>clear_queues(<span class="kw-2">&mut </span><span class="self">self</span>, clear_pending_accept: bool, store: <span class="kw-2">&mut </span>Store, counts: <span class="kw-2">&mut </span>Counts) { |
| <span class="self">self</span>.recv.clear_queues(clear_pending_accept, store, counts); |
| <span class="self">self</span>.send.clear_queues(store, counts); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="h2" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
