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Code Issues Releases Wiki Activity

add timeout for accepting tls connections (#393)

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Co-authored-by: Rob Ede <robjtede@icloud.com>
This commit is contained in:
fakeshadow 2021-11-16 08:22:24 +08:00 committed by GitHub
parent ce8ec15eaa
commit 7e7df2f931
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 382 additions and 50 deletions
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2
.cargo/config.toml
View File

@ -14,7 +14,7 @@ ci-check = "hack --workspace --feature-powerset --exclude-features=io-uring chec
ci-check-linux = "hack --workspace --feature-powerset check --tests --examples"
# tests avoiding io-uring feature
ci-test = "hack test --workspace --exclude=actix-rt --exclude=actix-server --all-features --lib --tests --no-fail-fast -- --nocapture"
ci-test = " hack --feature-powerset --exclude=actix-rt --exclude=actix-server --exclude-features=io-uring test --workspace --lib --tests --no-fail-fast -- --nocapture"
ci-test-rt = " hack --feature-powerset --exclude-features=io-uring test --package=actix-rt --lib --tests --no-fail-fast -- --nocapture"
ci-test-server = "hack --feature-powerset --exclude-features=io-uring test --package=actix-server --lib --tests --no-fail-fast -- --nocapture"

5
actix-tls/CHANGES.md
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@ -1,6 +1,11 @@
# Changes
## Unreleased - 2021-xx-xx
* Add configurable timeout for accepting TLS connection. [#393]
* Added `TlsError::Timeout` variant. [#393]
* All TLS acceptor services now use `TlsError` for their error types. [#393]
[#393]: https://github.com/actix/actix-net/pull/393
## 3.0.0-beta.8 - 2021-11-15

3
actix-tls/Cargo.toml
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@ -47,6 +47,7 @@ derive_more = "0.99.5"
futures-core = { version = "0.3.7", default-features = false, features = ["alloc"] }
http = { version = "0.2.3", optional = true }
log = "0.4"
pin-project-lite = "0.2.7"
tokio-util = { version = "0.6.3", default-features = false }
# openssl
@ -67,7 +68,9 @@ bytes = "1"
env_logger = "0.9"
futures-util = { version = "0.3.7", default-features = false, features = ["sink"] }
log = "0.4"
rcgen = "0.8"
rustls-pemfile = "0.2.1"
tokio-rustls = { version = "0.23", features = ["dangerous_configuration"] }
trust-dns-resolver = "0.20.0"
[[example]]

18
actix-tls/src/accept/mod.rs
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@ -1,9 +1,4 @@
//! TLS acceptor services for Actix ecosystem.
//!
//! ## Crate Features
//! * `openssl` - TLS acceptor using the `openssl` crate.
//! * `rustls` - TLS acceptor using the `rustls` crate.
//! * `native-tls` - TLS acceptor using the `native-tls` crate.
//! TLS acceptor services.
use std::sync::atomic::{AtomicUsize, Ordering};
@ -20,6 +15,10 @@ pub mod native_tls;
pub(crate) static MAX_CONN: AtomicUsize = AtomicUsize::new(256);
#[cfg(any(feature = "openssl", feature = "rustls", feature = "native-tls"))]
pub(crate) const DEFAULT_TLS_HANDSHAKE_TIMEOUT: std::time::Duration =
std::time::Duration::from_secs(3);
thread_local! {
static MAX_CONN_COUNTER: Counter = Counter::new(MAX_CONN.load(Ordering::Relaxed));
}
@ -36,7 +35,8 @@ pub fn max_concurrent_tls_connect(num: usize) {
/// TLS error combined with service error.
#[derive(Debug)]
pub enum TlsError<E1, E2> {
Tls(E1),
Service(E2),
pub enum TlsError<TlsErr, SvcErr> {
Tls(TlsErr),
Timeout,
Service(SvcErr),
}

50
actix-tls/src/accept/native_tls.rs
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@ -1,20 +1,24 @@
use std::{
convert::Infallible,
io::{self, IoSlice},
ops::{Deref, DerefMut},
pin::Pin,
task::{Context, Poll},
time::Duration,
};
use actix_codec::{AsyncRead, AsyncWrite, ReadBuf};
use actix_rt::net::{ActixStream, Ready};
use actix_rt::{
net::{ActixStream, Ready},
time::timeout,
};
use actix_service::{Service, ServiceFactory};
use actix_utils::counter::Counter;
use futures_core::future::LocalBoxFuture;
pub use tokio_native_tls::native_tls::Error;
pub use tokio_native_tls::TlsAcceptor;
pub use tokio_native_tls::{native_tls::Error, TlsAcceptor};
use super::MAX_CONN_COUNTER;
use super::{TlsError, DEFAULT_TLS_HANDSHAKE_TIMEOUT, MAX_CONN_COUNTER};
/// Wrapper type for `tokio_native_tls::TlsStream` in order to impl `ActixStream` trait.
pub struct TlsStream<T>(tokio_native_tls::TlsStream<T>);
@ -94,13 +98,25 @@ impl<T: ActixStream> ActixStream for TlsStream<T> {
/// `native-tls` feature enables this `Acceptor` type.
pub struct Acceptor {
acceptor: TlsAcceptor,
handshake_timeout: Duration,
}
impl Acceptor {
/// Create `native-tls` based `Acceptor` service factory.
#[inline]
pub fn new(acceptor: TlsAcceptor) -> Self {
Acceptor { acceptor }
Acceptor {
acceptor,
handshake_timeout: DEFAULT_TLS_HANDSHAKE_TIMEOUT,
}
}
/// Limit the amount of time that the acceptor will wait for a TLS handshake to complete.
///
/// Default timeout is 3 seconds.
pub fn set_handshake_timeout(&mut self, handshake_timeout: Duration) -> &mut Self {
self.handshake_timeout = handshake_timeout;
self
}
}
@ -109,13 +125,14 @@ impl Clone for Acceptor {
fn clone(&self) -> Self {
Self {
acceptor: self.acceptor.clone(),
handshake_timeout: self.handshake_timeout,
}
}
}
impl<T: ActixStream + 'static> ServiceFactory<T> for Acceptor {
type Response = TlsStream<T>;
type Error = Error;
type Error = TlsError<Error, Infallible>;
type Config = ();
type Service = NativeTlsAcceptorService;
@ -127,8 +144,10 @@ impl<T: ActixStream + 'static> ServiceFactory<T> for Acceptor {
Ok(NativeTlsAcceptorService {
acceptor: self.acceptor.clone(),
conns: conns.clone(),
handshake_timeout: self.handshake_timeout,
})
});
Box::pin(async { res })
}
}
@ -136,12 +155,13 @@ impl<T: ActixStream + 'static> ServiceFactory<T> for Acceptor {
pub struct NativeTlsAcceptorService {
acceptor: TlsAcceptor,
conns: Counter,
handshake_timeout: Duration,
}
impl<T: ActixStream + 'static> Service<T> for NativeTlsAcceptorService {
type Response = TlsStream<T>;
type Error = Error;
type Future = LocalBoxFuture<'static, Result<TlsStream<T>, Error>>;
type Error = TlsError<Error, Infallible>;
type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
fn poll_ready(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
if self.conns.available(cx) {
@ -154,10 +174,18 @@ impl<T: ActixStream + 'static> Service<T> for NativeTlsAcceptorService {
fn call(&self, io: T) -> Self::Future {
let guard = self.conns.get();
let acceptor = self.acceptor.clone();
let dur = self.handshake_timeout;
Box::pin(async move {
let io = acceptor.accept(io).await;
drop(guard);
io.map(Into::into)
match timeout(dur, acceptor.accept(io)).await {
Ok(Ok(io)) => {
drop(guard);
Ok(TlsStream(io))
}
Ok(Err(err)) => Err(TlsError::Tls(err)),
Err(_timeout) => Err(TlsError::Timeout),
}
})
}
}

67
actix-tls/src/accept/openssl.rs
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@ -1,22 +1,28 @@
use std::{
convert::Infallible,
future::Future,
io::{self, IoSlice},
ops::{Deref, DerefMut},
pin::Pin,
task::{Context, Poll},
time::Duration,
};
use actix_codec::{AsyncRead, AsyncWrite, ReadBuf};
use actix_rt::net::{ActixStream, Ready};
use actix_rt::{
net::{ActixStream, Ready},
time::{sleep, Sleep},
};
use actix_service::{Service, ServiceFactory};
use actix_utils::counter::{Counter, CounterGuard};
use futures_core::{future::LocalBoxFuture, ready};
use futures_core::future::LocalBoxFuture;
pub use openssl::ssl::{
AlpnError, Error as SslError, HandshakeError, Ssl, SslAcceptor, SslAcceptorBuilder,
};
use pin_project_lite::pin_project;
use super::MAX_CONN_COUNTER;
use super::{TlsError, DEFAULT_TLS_HANDSHAKE_TIMEOUT, MAX_CONN_COUNTER};
/// Wrapper type for `tokio_openssl::SslStream` in order to impl `ActixStream` trait.
pub struct TlsStream<T>(tokio_openssl::SslStream<T>);
@ -96,13 +102,25 @@ impl<T: ActixStream> ActixStream for TlsStream<T> {
/// `openssl` feature enables this `Acceptor` type.
pub struct Acceptor {
acceptor: SslAcceptor,
handshake_timeout: Duration,
}
impl Acceptor {
/// Create OpenSSL based `Acceptor` service factory.
#[inline]
pub fn new(acceptor: SslAcceptor) -> Self {
Acceptor { acceptor }
Acceptor {
acceptor,
handshake_timeout: DEFAULT_TLS_HANDSHAKE_TIMEOUT,
}
}
/// Limit the amount of time that the acceptor will wait for a TLS handshake to complete.
///
/// Default timeout is 3 seconds.
pub fn set_handshake_timeout(&mut self, handshake_timeout: Duration) -> &mut Self {
self.handshake_timeout = handshake_timeout;
self
}
}
@ -111,13 +129,14 @@ impl Clone for Acceptor {
fn clone(&self) -> Self {
Self {
acceptor: self.acceptor.clone(),
handshake_timeout: self.handshake_timeout,
}
}
}
impl<T: ActixStream> ServiceFactory<T> for Acceptor {
type Response = TlsStream<T>;
type Error = SslError;
type Error = TlsError<SslError, Infallible>;
type Config = ();
type Service = AcceptorService;
type InitError = ();
@ -128,8 +147,10 @@ impl<T: ActixStream> ServiceFactory<T> for Acceptor {
Ok(AcceptorService {
acceptor: self.acceptor.clone(),
conns: conns.clone(),
handshake_timeout: self.handshake_timeout,
})
});
Box::pin(async { res })
}
}
@ -137,11 +158,12 @@ impl<T: ActixStream> ServiceFactory<T> for Acceptor {
pub struct AcceptorService {
acceptor: SslAcceptor,
conns: Counter,
handshake_timeout: Duration,
}
impl<T: ActixStream> Service<T> for AcceptorService {
type Response = TlsStream<T>;
type Error = SslError;
type Error = TlsError<SslError, Infallible>;
type Future = AcceptorServiceResponse<T>;
fn poll_ready(&self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
@ -155,27 +177,38 @@ impl<T: ActixStream> Service<T> for AcceptorService {
fn call(&self, io: T) -> Self::Future {
let ssl_ctx = self.acceptor.context();
let ssl = Ssl::new(ssl_ctx).expect("Provided SSL acceptor was invalid.");
AcceptorServiceResponse {
_guard: self.conns.get(),
timeout: sleep(self.handshake_timeout),
stream: Some(tokio_openssl::SslStream::new(ssl, io).unwrap()),
}
}
}
pub struct AcceptorServiceResponse<T: ActixStream> {
stream: Option<tokio_openssl::SslStream<T>>,
_guard: CounterGuard,
pin_project! {
pub struct AcceptorServiceResponse<T: ActixStream> {
stream: Option<tokio_openssl::SslStream<T>>,
#[pin]
timeout: Sleep,
_guard: CounterGuard,
}
}
impl<T: ActixStream> Future for AcceptorServiceResponse<T> {
type Output = Result<TlsStream<T>, SslError>;
type Output = Result<TlsStream<T>, TlsError<SslError, Infallible>>;
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
ready!(Pin::new(self.stream.as_mut().unwrap()).poll_accept(cx))?;
Poll::Ready(Ok(self
.stream
.take()
.expect("SSL connect has resolved.")
.into()))
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.project();
match Pin::new(this.stream.as_mut().unwrap()).poll_accept(cx) {
Poll::Ready(Ok(())) => Poll::Ready(Ok(this
.stream
.take()
.expect("Acceptor should not be polled after it has completed.")
.into())),
Poll::Ready(Err(err)) => Poll::Ready(Err(TlsError::Tls(err))),
Poll::Pending => this.timeout.poll(cx).map(|_| Err(TlsError::Timeout)),
}
}
}

51
actix-tls/src/accept/rustls.rs
View File

@ -1,22 +1,28 @@
use std::{
convert::Infallible,
future::Future,
io::{self, IoSlice},
ops::{Deref, DerefMut},
pin::Pin,
sync::Arc,
task::{Context, Poll},
time::Duration,
};
use actix_codec::{AsyncRead, AsyncWrite, ReadBuf};
use actix_rt::net::{ActixStream, Ready};
use actix_rt::{
net::{ActixStream, Ready},
time::{sleep, Sleep},
};
use actix_service::{Service, ServiceFactory};
use actix_utils::counter::{Counter, CounterGuard};
use futures_core::future::LocalBoxFuture;
use pin_project_lite::pin_project;
use tokio_rustls::{Accept, TlsAcceptor};
pub use tokio_rustls::rustls::ServerConfig;
use super::MAX_CONN_COUNTER;
use super::{TlsError, DEFAULT_TLS_HANDSHAKE_TIMEOUT, MAX_CONN_COUNTER};
/// Wrapper type for `tokio_openssl::SslStream` in order to impl `ActixStream` trait.
pub struct TlsStream<T>(tokio_rustls::server::TlsStream<T>);
@ -96,6 +102,7 @@ impl<T: ActixStream> ActixStream for TlsStream<T> {
/// `rustls` feature enables this `Acceptor` type.
pub struct Acceptor {
config: Arc<ServerConfig>,
handshake_timeout: Duration,
}
impl Acceptor {
@ -104,8 +111,17 @@ impl Acceptor {
pub fn new(config: ServerConfig) -> Self {
Acceptor {
config: Arc::new(config),
handshake_timeout: DEFAULT_TLS_HANDSHAKE_TIMEOUT,
}
}
/// Limit the amount of time that the acceptor will wait for a TLS handshake to complete.
///
/// Default timeout is 3 seconds.
pub fn set_handshake_timeout(&mut self, handshake_timeout: Duration) -> &mut Self {
self.handshake_timeout = handshake_timeout;
self
}
}
impl Clone for Acceptor {
@ -113,13 +129,14 @@ impl Clone for Acceptor {
fn clone(&self) -> Self {
Self {
config: self.config.clone(),
handshake_timeout: self.handshake_timeout,
}
}
}
impl<T: ActixStream> ServiceFactory<T> for Acceptor {
type Response = TlsStream<T>;
type Error = io::Error;
type Error = TlsError<io::Error, Infallible>;
type Config = ();
type Service = AcceptorService;
@ -131,8 +148,10 @@ impl<T: ActixStream> ServiceFactory<T> for Acceptor {
Ok(AcceptorService {
acceptor: self.config.clone().into(),
conns: conns.clone(),
handshake_timeout: self.handshake_timeout,
})
});
Box::pin(async { res })
}
}
@ -141,11 +160,12 @@ impl<T: ActixStream> ServiceFactory<T> for Acceptor {
pub struct AcceptorService {
acceptor: TlsAcceptor,
conns: Counter,
handshake_timeout: Duration,
}
impl<T: ActixStream> Service<T> for AcceptorService {
type Response = TlsStream<T>;
type Error = io::Error;
type Error = TlsError<io::Error, Infallible>;
type Future = AcceptorServiceFut<T>;
fn poll_ready(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
@ -158,22 +178,31 @@ impl<T: ActixStream> Service<T> for AcceptorService {
fn call(&self, req: T) -> Self::Future {
AcceptorServiceFut {
_guard: self.conns.get(),
fut: self.acceptor.accept(req),
timeout: sleep(self.handshake_timeout),
_guard: self.conns.get(),
}
}
}
pub struct AcceptorServiceFut<T: ActixStream> {
fut: Accept<T>,
_guard: CounterGuard,
pin_project! {
pub struct AcceptorServiceFut<T: ActixStream> {
fut: Accept<T>,
#[pin]
timeout: Sleep,
_guard: CounterGuard,
}
}
impl<T: ActixStream> Future for AcceptorServiceFut<T> {
type Output = Result<TlsStream<T>, io::Error>;
type Output = Result<TlsStream<T>, TlsError<io::Error, Infallible>>;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.get_mut();
Pin::new(&mut this.fut).poll(cx).map_ok(TlsStream)
let mut this = self.project();
match Pin::new(&mut this.fut).poll(cx) {
Poll::Ready(Ok(stream)) => Poll::Ready(Ok(TlsStream(stream))),
Poll::Ready(Err(err)) => Poll::Ready(Err(TlsError::Tls(err))),
Poll::Pending => this.timeout.poll(cx).map(|_| Err(TlsError::Timeout)),
}
}
}

130
actix-tls/tests/accept-openssl.rs Normal file
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@ -0,0 +1,130 @@
//! Use Rustls connector to test OpenSSL acceptor.
#![cfg(all(
feature = "accept",
feature = "connect",
feature = "rustls",
feature = "openssl"
))]
use std::{convert::TryFrom, io::Write, sync::Arc};
use actix_rt::net::TcpStream;
use actix_server::TestServer;
use actix_service::ServiceFactoryExt as _;
use actix_tls::accept::openssl::{Acceptor, TlsStream};
use actix_utils::future::ok;
use tokio_rustls::rustls::{Certificate, ClientConfig, RootCertStore, ServerName};
fn new_cert_and_key() -> (String, String) {
let cert = rcgen::generate_simple_self_signed(vec![
"127.0.0.1".to_owned(),
"localhost".to_owned(),
])
.unwrap();
let key = cert.serialize_private_key_pem();
let cert = cert.serialize_pem().unwrap();
(cert, key)
}
fn openssl_acceptor(cert: String, key: String) -> tls_openssl::ssl::SslAcceptor {
use tls_openssl::{
pkey::PKey,
ssl::{SslAcceptor, SslMethod},
x509::X509,
};
let cert = X509::from_pem(cert.as_bytes()).unwrap();
let key = PKey::private_key_from_pem(key.as_bytes()).unwrap();
let mut builder = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
builder.set_certificate(&cert).unwrap();
builder.set_private_key(&key).unwrap();
builder.set_alpn_select_callback(|_, _protocols| Ok(b"http/1.1"));
builder.set_alpn_protos(b"\x08http/1.1").unwrap();
builder.build()
}
#[allow(dead_code)]
mod danger {
use std::time::SystemTime;
use super::*;
use tokio_rustls::rustls::{
self,
client::{ServerCertVerified, ServerCertVerifier},
};
pub struct NoCertificateVerification;
impl ServerCertVerifier for NoCertificateVerification {
fn verify_server_cert(
&self,
_end_entity: &Certificate,
_intermediates: &[Certificate],
_server_name: &ServerName,
_scts: &mut dyn Iterator<Item = &[u8]>,
_ocsp_response: &[u8],
_now: SystemTime,
) -> Result<ServerCertVerified, rustls::Error> {
Ok(ServerCertVerified::assertion())
}
}
}
#[allow(dead_code)]
fn rustls_connector(_cert: String, _key: String) -> ClientConfig {
let mut config = ClientConfig::builder()
.with_safe_defaults()
.with_root_certificates(RootCertStore::empty())
.with_no_client_auth();
config
.dangerous()
.set_certificate_verifier(Arc::new(danger::NoCertificateVerification));
config.alpn_protocols = vec![b"http/1.1".to_vec()];
config
}
#[actix_rt::test]
async fn accepts_connections() {
let (cert, key) = new_cert_and_key();
let srv = TestServer::with({
let cert = cert.clone();
let key = key.clone();
move || {
let openssl_acceptor = openssl_acceptor(cert.clone(), key.clone());
let tls_acceptor = Acceptor::new(openssl_acceptor);
tls_acceptor
.map_err(|err| println!("OpenSSL error: {:?}", err))
.and_then(move |_stream: TlsStream<TcpStream>| ok(()))
}
});
let mut sock = srv
.connect()
.expect("cannot connect to test server")
.into_std()
.unwrap();
sock.set_nonblocking(false).unwrap();
let config = rustls_connector(cert, key);
let config = Arc::new(config);
let mut conn = tokio_rustls::rustls::ClientConnection::new(
config,
ServerName::try_from("localhost").unwrap(),
)
.unwrap();
let mut stream = tokio_rustls::rustls::Stream::new(&mut conn, &mut sock);
stream.flush().expect("TLS handshake failed");
}

104
actix-tls/tests/accept-rustls.rs Normal file
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@ -0,0 +1,104 @@
//! Use OpenSSL connector to test Rustls acceptor.
#![cfg(all(
feature = "accept",
feature = "connect",
feature = "rustls",
feature = "openssl"
))]
use std::io::{BufReader, Write};
use actix_rt::net::TcpStream;
use actix_server::TestServer;
use actix_service::ServiceFactoryExt as _;
use actix_tls::accept::rustls::{Acceptor, TlsStream};
use actix_tls::connect::tls::openssl::SslConnector;
use actix_utils::future::ok;
use rustls_pemfile::{certs, pkcs8_private_keys};
use tls_openssl::ssl::SslVerifyMode;
use tokio_rustls::rustls::{self, Certificate, PrivateKey, ServerConfig};
fn new_cert_and_key() -> (String, String) {
let cert = rcgen::generate_simple_self_signed(vec![
"127.0.0.1".to_owned(),
"localhost".to_owned(),
])
.unwrap();
let key = cert.serialize_private_key_pem();
let cert = cert.serialize_pem().unwrap();
(cert, key)
}
fn rustls_server_config(cert: String, key: String) -> rustls::ServerConfig {
// Load TLS key and cert files
let cert = &mut BufReader::new(cert.as_bytes());
let key = &mut BufReader::new(key.as_bytes());
let cert_chain = certs(cert).unwrap().into_iter().map(Certificate).collect();
let mut keys = pkcs8_private_keys(key).unwrap();
let mut config = ServerConfig::builder()
.with_safe_defaults()
.with_no_client_auth()
.with_single_cert(cert_chain, PrivateKey(keys.remove(0)))
.unwrap();
config.alpn_protocols = vec![b"http/1.1".to_vec()];
config
}
fn openssl_connector(cert: String, key: String) -> SslConnector {
use actix_tls::connect::tls::openssl::{SslConnector as OpensslConnector, SslMethod};
use tls_openssl::{pkey::PKey, x509::X509};
let cert = X509::from_pem(cert.as_bytes()).unwrap();
let key = PKey::private_key_from_pem(key.as_bytes()).unwrap();
let mut ssl = OpensslConnector::builder(SslMethod::tls()).unwrap();
ssl.set_verify(SslVerifyMode::NONE);
ssl.set_certificate(&cert).unwrap();
ssl.set_private_key(&key).unwrap();
ssl.set_alpn_protos(b"\x08http/1.1").unwrap();
ssl.build()
}
#[actix_rt::test]
async fn accepts_connections() {
let (cert, key) = new_cert_and_key();
let srv = TestServer::with({
let cert = cert.clone();
let key = key.clone();
move || {
let tls_acceptor = Acceptor::new(rustls_server_config(cert.clone(), key.clone()));
tls_acceptor
.map_err(|err| println!("Rustls error: {:?}", err))
.and_then(move |_stream: TlsStream<TcpStream>| ok(()))
}
});
let sock = srv
.connect()
.expect("cannot connect to test server")
.into_std()
.unwrap();
sock.set_nonblocking(false).unwrap();
let connector = openssl_connector(cert, key);
let mut stream = connector
.connect("localhost", sock)
.expect("TLS handshake failed");
stream.do_handshake().expect("TLS handshake failed");
stream.flush().expect("TLS handshake failed");
}

2
actix-utils/src/counter.rs
View File

@ -26,7 +26,7 @@ impl Counter {
CounterGuard::new(self.0.clone())
}
/// Notify current task and return true if counter is at capacity.
/// Returns true if counter is below capacity. Otherwise, register to wake task when it is.
pub fn available(&self, cx: &mut task::Context<'_>) -> bool {
self.0.available(cx)
}